Nissan Almera n15 - Engine Control System.pdf

ENGINE CONTROL SYSTEM

EC

SECTION

•

CONTENTS PRECAUTIONS AND PREPARATION Special

Service

Supplemental BAG"

4

Tools

4

Restraint

System

Supplemental

Restraint

BAG"

Air Bag System)

(Single

System

(SRS) "AIR

(Dual Air Bag System)

7

System

(SRS) "AIR 7

Diagnosis

8 8 of

Engine

9

Precautions

9

c=

~

GA

ENGINE AND EMISSION CONTROL OVERALL SYSTEM Circuit

Diagram

-

Circuit

Diagram

-

System

Diagram

Europe

and Israel

System

Diagram

System

Diagram

Europe,

Israel

System

ECCS Component ECCS Component except

for Europe,

ECCS Component ECCS Component

(at no load & high engine 28

GA15DE

-

GA 16DE except

Inspection

29

Parts Location

-

31

Inspection

32

BASIC SERVICE PROCEDURE Fuel Pressure

Release

Fuel Pressure

Check

Fuel Pressure

Regulator

Parts Location Parts Location

-

GA15DE

-

Malfunction CONSULT

33 Check

33

and Installation

34

Timing/ldle

Mixture

Ratio

,

35

Indicator

Lamp

(MIL)

.44 44 .48

TROUBLE DIAGNOSIS -

General Description

58

15

Introduction

58

16

Work Flow

59

17

Diagnostic

Description 18

Diagnostic Fail-Safe

19

Basic

for Work Flow

60

Worksheet

61

Trouble

62

Code (DTC) Chart

Chart

64

Inspection

65

Fast Idle Cam (FIC) Inspection

GA 16DE 20

Parts Location

33 33

Adjustment

14

GA 16DE

and Australia

Parts Location

Removal

13

GA 14DE,

and Israel

31

Description

ON-BOARD DIAGNOSTIC SYSTEM DESCRIPTION

for

GA 16DE for Australia

29

POSITIVE CRANKCASE VENTILATION

12

Hose Drawing

28

EVAPORATIVE EMISSION SYSTEM

For Australia

for Austral ia Vacuum

27

Cut Control

Idle Speed/lgnition

Israel

24

(01) System

Fuel Cut Control

Injector

-

ECCS Component

(MFI) System

Air Conditioning

11

GA 14DE, GA 16DE for

GA 16DE for Europe

Ignition

11

-

-

23

Fuel Injection

Except for Australia

and Australia

Diagram

Multiport

speed)

PRECAUTIONS AND PREPARATION Engine Fuel & Emission Control System for ECCS Trouble

23

Chart..

Distributor

GA,SR

Precautions

ENGINE AND EMISSION BASIC CONTROL SYSTEM DESCRiPTION

Adjustment

-

For Europe

and Israel

21

Fast Idle Cam (FIC) Inspection

22

Adjustment Symptom

Matrix

Except Chart

and 68

and

for Europe

and Israel.

68 71

CONTENTS CONSULT Reference Value in Data Monitor Mode 74 Major Sensor Reference Graph in Data Monitor Mode 76 ECM Terminals and Reference Value 78 TROUBLE DIAGNOSIS FOR POWER SUPPLY 88 Main Power Supply and Ground Circuit.. 88 TROUBLE DIAGNOSIS FOR DTC 11 94 Camshaft Position Sensor (CMPS) 94 TROUBLE DIAGNOSIS FOR DTC 12 101 Mass Air Flow Sensor (MAFS) 101 TROUBLE DIAGNOSIS FOR DTC 13 108 Engine Coolant Temperature Sensor (ECTS) 108 TROUBLE DIAGNOSIS FOR DTC 21 113 Ignition Signal 113 TROUBLE DIAGNOSIS FOR DTC 34 119 Knock Sensor (KS) 119 TROUBLE DIAGNOSIS FOR DTC 41 124 Intake Air Temperature Sensor (IATS) 124 TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS , '" .128 Throttle Position Sensor 128 Vehicle Speed Sensor (VSS) 133 Start Signal 138 Injector 141 Fuel Pump 145 Idle Air Control Valve (IACV) - Auxiliary Air Control (AAC) Valve 150 Cooling Fan Control 156 Power Steering Oil Pressure Switch 169 Park/Neutral Position Switch 173 EVAP Canister Purge Control Solenoid Valve 179 EGR Valve and EVAP Canister Purge Control Solenoid Valve 183 Heated Oxygen Sensor (H02S) 189 Oxygen Sensor (02S) 194 Valve Timing Control (VTC) 198 IACV-FICD Solenoid Valve 204 Electrical Load Signal 211 Torque Converter Clutch Solenoid Valve 219 MIL & Data Link Connectors 223 SR

ENGINE AND EMISSION CONTROL OVERALL SYSTE M Circuit Diagram System Diagram ECCS Component Parts Location Vacuum Hose Drawing System Chart...

226 226 227 228 231 232

(Cont'd.)

ENGINE AND EMISSION BASIC CONTROL SYSTEM DESCRiPTION Multipart Fuel Injection (MFI) System Distributor Ignition (01) System Air Conditioning Cut Control Fuel Cut Control (at no load & high engine speed) EVAPORATIVE EMISSION SYSTEM Description Inspection POSITIVE CRANKCASE VENTILATION Description Inspection BASIC SERVICE PROCEDURE Fuel Pressure Release Fuel Pressure Check Fuel Pressure Regulator Check Injector Removal and Installation Idle Speed/Ignition Timing/Idle Mixture Ratio Adjustment ON-BOARD DIAGNOSTIC SYSTEM DESCRIPTION Malfunction Indicator Lamp (MIL) CONSULT TROUBLE DIAGNOSIS - General Description Introduction Work Flow Description for Work Flow Diagnostic Worksheet Diagnostic Trouble Code (DTC) Chart Fail-Safe Chart Basic Inspection Symptom Matrix Chart. CONSULT Reference Value in Data Monitor Mode Major Sensor Reference Graph in Data Monitor Mode ECM"Terminals and Reference Value TROUBLE DIAGNOSIS FOR POWER SUPPLY Main Power Supply and Ground Circuit.. TROUBLE DIAGNOSIS FOR DTC 11 Camshaft Position Sensor (CMPS) TROUBLE DIAGNOSIS FOR DTC 12 Mass Air Flow Sensor (MAFS) TROUBLE DIAGNOSIS FOR DTC 13 Engine Coolant Temperature Sensor (ECTS) TROUBLE DIAGNOSIS FOR DTC 21 Ignition Signal TROUBLE DIAGNOSIS FOR DTC 34 Knock Sensor (KS)

233 233 235 236 237 238 238 238 240 240 240 241 241 241 242 242 243 ..250 250 254 264 264 265 266 267 268 270 271 274 277 279 281 286 286 289 289 293 293 297 297 301 301 306 306

CONTENTS TROUBLE

DIAGNOSIS

FOR DTC 43

Throttle Position Sensor TROUBLE

DIAGNOSIS

309 309

FUEL SYSTEM

314 314 317

CRANKCASE

FOR NON-DETECTABLE

ITEMS

Vehicle Speed Sensor (VSS) Start Signal Exhaust Gas Recirculation (EGR) Valve and EVAP Canister Purge Control Injector Fuel Pump Idle Air Control Valve (IACV)-Air Regulator Idle Air Control Valve (IACV) - Auxiliary Air Control (AAC) Valve : Idle Air Control Valve (IACV)-FICD Solenoid Valve '" Cooling Fan Control Power Steering Oil Pressure Switch Park/Neutral Position Switch Heated Oxygen Sensor (H02S) Torque Converter Clutch Solenoid Valve Malfunction Indicator Lamp (MIL) & Data Link Connector (DLC) for CONSULT

(Cont'd.) 381 381 381 382 382

CHECK

Priming Pump Check Fuel Cut Solenoid Valve VENTILATION

SYSTEM

Ventilation Hose ENGINE

AND EMISSION

CONTROL

OVERALL

SYSTEM

319 324 327 332

Component Parts Location System Diagram Circuit Diagram System Chart. TROUBLE

335 339 343 354 357 362 367 370

,

DIAGNOSES

ECM Terminals and Reference Values Quick-glow System Partial Load Advance (PLA) Control Cooling Fan Control Air Conditioner Cut Control Fuel Cut Control

383 383 384 385 386 387 387 390 399 404 413 416

GA SERVICE

DATA AND SPECIFICATIONS

(505)

.417 417 417

(505)

.418 418 .418

(505)

.419 419 419

General Specifications Inspection and Adjustment..

CD INJECTION VE.TYPE

SYSTEM INJECTION

PUMP

Removal Installation Adjustment INJECTION

NOZZLE

Removal and Installation Disassembly Inspection Cleaning Assembly Test and Adjustment

371 372 372 373 374 376 376 376 377 377 378 379

SR SERVICE


General Specifications Inspection and Adjustment..

CD SERVICE


VE-type Injection Pump Injection Nozzle

When you read wiring diagrams: • Read GI section, "HOW TO READ WIRING DIAGRAMS" . • See El section, "POWER SUPPLY ROUTING" for power distribution circuit. When you perform trouble diagnoses, read GI section, "HOW TO FOllOW FLOW CHART IN TROUBLE DIAGNOSES" and "HOW TO PERFORM EFFICIENT DIAGNOSIS FOR AN ELECTRICAL INCIDENT".

•

PRECAUTIONS AND PREPARATION Special Service Tools Engine Tool number Tool name

application

Description

EG11140000 Ignition coil adapter harness

SR

GA

x

x

Measuring engine speed

NT338

KV10117100 Heated oxygen sensor wrench

Loosening or tightening heated oxygen sensor

x NT630

KV10114400 Oxygen sensor wrench

Loosening or lightening heated oxygen sensor

x a: 22 mm (0.87 in)

NT636

FOR CD ENGINE VE- TYPE INJECTION Adjusting

PUMP

device on vehicle

Tool number Tool name

Description

KV11229352 Measuring device CD KV11229350 Holder @ KV11229360 Nut @ KV11229370 Pin @ KV11254410 Dial gauge

Measuring set length of plunger spring

NT570

KV11102900 Pulley puller

Removing injection pump sprocket

NT647

EC-4

PRECAUTIONS AND PREPARATION Special Service Tools (Cont'd) FOR CD ENGINE INJECTION NOZZLE Tool number Tool name

Description

KV11289004

Nozzle cleaning kit

CD

KV11290012

Box

@

KV11290110

Brush @ KV11290122

•

Nozzle oil sump scraper @ KV11290140 Nozzle needle tip cleaner

@

KV11290150

Nozzle seat scraper @ KV11290210 Nozzle holder !J) KV11290220 Nozzle hole cleaning needle

NT296

KV11292010

Nozzle centering device

NT293

KV11100300

Nozzle holder socket

NT563

EC-5

PRECAUTIONS AND PREPARATION NOTE

EC-6

PRECAUTIONS AND PREPARATION Supplemental Restraint System (SRS) "AIR BAG" (Dual Air Bag System) The Supplemental Restraint System "Air Bag", used along with a seat belt, helps to reduce the risk or severity of injury to the driver and front passenger in a frontal collision. The Supplemental Restraint System consists of air bag modules (located in the center of the steering wheel and on the instrument panel on the passenger side), a diagnosis sensor unit, warning lamp, wiring harness and spiral cable. Information necessary to service the system safely is included in the RS section of this Service Manual. WARNING: • To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death in the event of a collision which would result in air bag inflation, all maintenance must be performed by an authorized NISSAN dealer. • • Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal injury caused by unintentional activation of the system. • Do not use electrical test equipment ~n any circuit related to the SRS unless instructed to in this Service Manual. SRS wiring harnesses are covered with yellow insulation either just before the harness connectors or for the complete harness, for easy identification.

Supplemental Restraint System (SRS) "AIR BAG" (Single Air Bag System) The Supplemental Restraint System "Air Bag", used along with a seat belt, helps to reduce the risk or severity of injury to the driver in a frontal collision. The Supplemental Restraint System consists of an air bag module (located in the center of the steering wheel), a diagnosis sensor unit, warning lamp, wiring harness and spiral cable. Information necessary to service the system safely is included in the RS section of this Service Manual. WARNING: • To avoid rendering the SRS inoperative, which could increase the in the event of a collision which would result in air bag inflation, all by an authorized NISSAN dealer. • Improper maintenance, including incorrect removal and installation injury caused by unintentional activation of the system. • Do not use electrical test equipment on any circuit related to the Service Manual.

EC-7

risk of personal injury or death maintenance must be performed of the SRS, can lead to personal SRS unless instructed

to in this

PRECAUTIONS AND PREPARATION

I GA,

SR

Engine Fuel & Emission Control System ECM • Do not disassembly module).

EGM (EGGS control

• Do not turn diagnosis forcibly.

BATTERY • Always use a 12 volt battery as power source.

mode selector

• If a battery terminal is disconnected, the memory will return to the ECM value. The ECM will now start to self-control at its initial value. Engine operation can vary slightly when the terminal is disconnected. However, this is not an indication of a problem. Do not replace parts because of a slight variation.

• Do not attempt to disconnect battery cables while engine is running.

WIRELESS EQUIPMENT • When installing C.B. ham radio or a mobile phone, be sure to observe the following as it may adversely affect electronic control systems depending on its installation location . 1) Keep the antenna as far as possible away from the EGM. 2) Keep the antenna feeder line more than 20 em (7.9 in) away from the harness of electronic controls. Do not let them run parallel for a long distance. 3) Adjust the antenna and feeder line so that the standing-wave ratio can be kept smaller. 4) Be sure to ground the radio to vehicle body.

INJECTOR • Do not disconnect injector harness connectors with engine running . • Do not apply battery injectors.

power directly to

ECCS PARTS HANDLING • Handle mass air flow sensor carefully avoid damage. • Do not disassemble mass air flow sensor.

to

• Do not clean mass air flow sensor with any type of detergent. • Do not disassemble • Even a system • Do not position

IACV-AAC valve.

slight leak in the air intake can cause serious problems. shock or jar the camshaft sensor.

WHEN STARTING • Do not depress accelerator starting.

pedal when

• Immediately after starting, do not rev up engine unnecessarily . • Do not rev up engine just prior to shutdown.

FUEL PUMP • Do not operate fuel pump when there is no fuel in lines. • Tighten fuel hose clamps to the specified torque. ECCS HARNESS HANDLING • Securely connect EGGS harness connectors. A poor connection can cause an extremely high (surge) voltage to develop in coil and condenser, thus resulting in damage to ICs . • Keep ECGS harness at least 10 em (3.9 in) away from adjacent harnesses, to prevent an EGGS system malfunction due to receiving external noise, degraded operation of IGs, etc . • Keep EGCS parts and harnesses dry . • Before removing parts, turn off ignition switch and then disconnect battery ground cable.

SEF320R

EC-8

I

PRECAUTIONS AND PREPARATION

I GA, SR I

Precautions for ECCS Trouble Diagnosis of Engine CAUTION: • Be sure to turn the ignition switch "OFF" and disconnect the negative battery terminal before any repair or inspection work. The open/short circuit of related switches, sensors, solenoid valves, etc. will cause malfunction. • Be sure to connect and lock the connectors securely after work. A loose (unlocked) connector will cause malfunction due to the open circuit. (Be sure the connector is free from water, grease, dirt, bent terminals, etc.) • Be sure to route and clamp the harnesses properly after work. The interference of the harness with a bracket, etc. may cause malfunction due to the short circuit. • Be sure to connect rubber tubes properly after work. A misconnected or disconnected rubber tube • may cause malfunction. • Be sure to erase the unnecessary malfunction information (repairs completed) in the ECM before returning the vehicle to the customer.

Precautions •

Before connecting or disconnecting the ECM harness connector, turn ignition switch OFF and disconnect negative battery terminal. Failure to do so may damage the ECM because battery voltage is applied to ECM even if ignition switch is turned off.

•

When connecting ECM harness connector, tighten securing bolt until red projection is in line with connector face.

•

When connecting or disconnecting pin connectors into or from ECM, take care not to damage pin terminals (bend or break). Make sure that there are not any bends or breaks on ECM pin terminal, when connecting pin connectors.

SEF289H

SEF725H

Bend

Break SEF291H

EC-9

PRECAUTIONS AND PREPARATION Precautions (Cont'd)

"

/

\ -

'~/"

/

•

Before replacing ECM, perform Terminals and Reference Value inspection and make sure ECM functions properly. Refer to EC-281 for SR engine model and EC-78 for GA engine model.

•

After performing each TROUBLE DIAGNOSIS, perform "OVERALL FUNCTIONCHECK" or "DTC (Diagnostic Trouble Code) CONFIRMATIONPROCEDURE". The DTC should not be displayed in the "DTC CONFIRMATION PROCEDURE"if the repair is completed. The "OVERALL FUNCTION CHECK" should be a good result if the repair is completed.

•

When measuring ECM signals with a circuit tester, never allow the two tester probes to contact. Accidental contact of probes will cause a short circuit and damage the ECM power transistor.

MEF040D

I / CHECK-

/

,

I GA, SR I

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)

.1 SEF34BN

EC-10

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ENGINE AND EMISSION CONTROL OVERALL SYSTEM System Diagram Europe and Israel .c

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EC-13

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0

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~> ~ "0

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SEF450QA

EC-15

ENGINE AND EMISSION CONTROL OVERALL SYSTEM System Diagram -


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•

SEF121R

EC-16

ENGINE AND EMISSION CONTROL OVERALL SYSTEM ECCS Component Parts Location GA 16DE for Europe and Israel Fast idle cam

EGR valve & EVAP canister

GA 14DE,

purge control solenoid valve

Mass air flow sensor Throttle

position sensor

Power steering oil pressure switch

•

Engine coolant temperature sensor IACV-FICD solenoid valve IACV-AAC

Distributor with built-in camshaft position sensor, power transistor and ignition coil

valve

Throttle

position sensor

SEF122R

EC-17

ENGINE AND EMISSION CONTROL OVERALL SYSTEM ECCS Component Parts Location EGR valve & EVAP canister (Only M/T models)

Mass air flow sensor Throttle

position

f

sensor

Engine coolant temperature sensor IACV-AAC valve (with FICD solenoid valve)

GA 15DE

purge control solenoid

valve

EGR valve (Only M/T models)

Oxygen sensor

Fuel filter EVAP canister


Mass air flow sensor

Throttle position

sensor

SEF123R

EC-18

ENGINE AND EMISSION CONTROL OVERALL SYSTEM ECCS Component Parts Location - GA 16DE except for Europe, Israel and Australia Throttle position sensor

Engine coolant temperature sensor Power steering oil

,,,,,"to

'WI"h~~>- __

EVAP canister purge control solenoid valve (Only M/T models)

"7-_

•

VTC solenoid valve Oxygen sensor

Engine coolant temperature sensor VTC solenoid valve

Throttle position sensor

SEF451QA

EC-19

ENGINE AND EMISSION CONTROL OVERALL SYSTEM ECCS Component Parts Location Australia

Engine coolant temperature sensor

VTC solenoid

EGR valve & EVAP canister purge control solenoid valve

Throttle position

GA 16DE for

sensor

IACV-AAC valve (with FICO solenoid

valve)

valve Heated oxygen sensor (AfT models) Oxygen sensor (MfT models)


Engine coolant temperature sensor VTC solenoid valve

Throttle

position sensor

SEF124R

EC-20

ENGINE AND EMISSION CONTROL OVERALL SYSTEM

[]K]

ECCS Component Parts Location

Behind the center console

• SEF452Q

EC-21

ENGINE AND EMISSION CONTROL OVERALL SYSTEM Vacuum Hose Drawing GA 14DE, GA 16DE for Europe

~. Throttle body

10

\1--"~

EGR valve

z:

~L/ 1 5

0

~

I t~:::L

4

~

8

To EVAP canister ¥

EGR valve & EVAP canister purge

control solenoid

GA15DE

"

BPT valve

W


3-way connector

valve

MIT models

AIT models

AIT models

Pressure

regulator

SEF125R

(1) @ @ @ @

@

Pressure regulator to intake manifold EGR valve to 3-way connector 3-way connector to 3-way connector BPT valve to 3-way connector 3-way connector to EVAP canister EGR valve & EVAP canister purge control solenoid valve to 3-way connector

(j)

@

@

@l

EGR valve & EVAP canister purge control solenoid valve to air cleaner EGR valve & EVAP canister purge control solenoid valve to throttle body Pressure regulator to throttle body EGR valve & EVAP canister purge control solenoid valve to air duct

EC-22

@

@ @ @ @

Throttle body to EVAP canister EVAP canister purge control valve to throttle body EVAP canister purge control valve to EVAP canister EVAP canister purge control valve to resonator Throttle body to EVAP canister

ENGINE AND EMISSION BASIC CONTROL SYSTEM DESCRIPTION System Chart

I Camshaft position sensor Fuel injection & mixture '1

Injectors

ratio control

Knock sensor Distributor ignition system

Power transistor

Mass air flow sensor *4

Engine coolant temperature

Idle air control system

sensor

Ignition switch

IACV-AAC valve (With FICD solenoid valve)

Fuel pump control

Fuel pump relay

2 Throttle position sensor

Oxygen sensor monitor & On-board diagnostic system

Malfunction indicator lamp (On the instrument panel)

Neutral positionllnhibitor switch

Air conditioner switch

5 ECM Torque converter clutch can(ECCS cel solenoid valve control control module) (A/T models)

'5 Torque converter clutch solenoid valve

Battery voltage


I

Cooling fan control

Cooling fan relay

Air conditioner cut control during acceleration

Air conditioner relays

Vehicle speed sensor *6

6 *2

I Oxygen sensor

Valve timing control 7

EVAP canister purge control

*3

Intake air temperature sensor

EVAP canister purge control solenoid valve

'8

8 Electrical load • Rear defogger switch • Lighting switch

VTC solenoid valve

EGR & EVAP canister purge control

*1: Except for Europe and Israel *2: Heated oxygen sensor (For Europe and Israel, and Australia A/T models) Oxygen sensor (Except for Europe and Israel, and Australia A/T models) *3: For Australia *4: IACV-AAC valve and IACV-FICD solenoid valve (For Europe and Israel) IACV-AAC valve (with FICD solenoid valve) (Except for Europe and Israel) '5: Except for Europe *6: GA16DE except for Europe and Israel *7: GA 16DE MIT models except for Europe, Israel and Australia *8: For Europe and Israel and Australia, and GA15DE MIT models

EC-23


•

ENGINE AND EMISSION BASIC CONTROL SYSTEM DESCRIPTION Multipart Fuel Injection (MFI) System INPUT/OUTPUT

SIGNAL LINE

Camshaft position sensor

Engine speed and piston position


Amount of intake air



*1

Density of oxygen in exhaust gas

Oxygen sensor

Throttle position


Throttle valve idle position Neutral position/Inhibitor

switch

Vehicle speed sensor

~gnition

switch

Gear position

ECM (ECCS control module)

Injector

Vehicle speed

Start signal


Air conditioner operation


Power steering load signal

Battery

Battery voltage

*1: Heated oxygen sensor (For Europe and Israel, and Australia A/T models) Oxygen sensor (Except for Europe and Israel, and Australia A/T models)

BASIC MUL TIPORT FUEL INJECTION SYSTEM

VARIOUS FUEL INJECTION INCREASE/DECREASE COMPENSATION

The amount of fuel injected from the fuel injector is determined by the ECM. The ECM controls the length of time the valve remains open (injection pulse duration). The amount of fuel injected is a program value in the ECM memory. The program value is preset by engine operating conditions. These conditions are determined by input signals (for engine speed and intake air) from both the camshaft position sensor and the mass air flow sensor.

In addition, the amount of fuel injected is compensated to improve engine performance under various operating conditions as listed below. < Fuel increase> • During warm-up • When starting the engine • During acceleration • Hot-engine operation • When selector lever is changed from "N" to "D" (AfT models only) • High-load, high-speed operation < Fuel decrease> • During deceleration

EC-24

ENGINE AND EMISSION BASIC CONTROL SYSTEM DESCRIPTION [ill Multipart Fuel Injection (MFI) System (Cant' d) MIXTURE RATIO FEEDBACK CONTROL (CLOSED LOOP CONTROL)

CLOSED LOOP CONTROL

Feedback signal

MEF025DC

The mixture ratio feedback system provides the best air-fuel mixture ratio for driveability and emission control. The three way catalyst can then better reduce CO, HC and NOx emissions. This system uses an oxygen sensor*1 in the exhaust manifold to monitor if the engine operation is rich or lean. The ECM adjusts the injection pulse width according to the sensor voltage signal. This maintains the mixture ratio within the range of stoichiometric (ideal air-fuel mixture). This stage is referred to as the closed loop control condition .

OPEN LOOP CONTROL The open loop system condition refers to when the ECM detects any of the following conditions. Feedback control stops in order to maintain stabilized fuel combustion. • Deceleration and acceleration • High-load, high-speed operation • Engine idling • Malfunction of oxygen sensor*1 or its circuit • Insufficient activation of oxygen sensor*1 at low engine coolant temperature • High-engine coolant temperature • After shifting from "N" to "D" • During warm-up • When starting the engine

MIXTURE RATIO SELF-LEARNING

CONTROL

The mixture ratio feedback control system monitors the mixture ratio signal transmitted from the oxygen sensor*1. This feedback signal is then sent to the ECM. The ECM controls the basic mixture ratio as close to the theoretical mixture ratio as possible. However, the basic mixture ratio is not necessarily controlled as originally designed. Both manufacturing differences (i.e., mass air flow sensor hot film) and characteristic changes during operation (i.e., injector clogging) directly affect mixture ratio. Accordingly, the difference between the basic and theoretical mixture ratios is monitored in this system. This is then computed in terms of "injection pulse duration" to automatically compensate for the difference between the two ratios. * 1: Heated oxygen sensor (For Europe and Israel, and Australia AIT models) Oxygen sensor (Except for Europe and Israel, and Australia AIT models)

EC-25

•

ENGINE AND EMISSION BASIC CONTROL SYSTEM DESCRIPTION @K] Multipart Fuel Injection (MFI) System (Cont'd) No.1 cylinder

---r:T

/

Injection pUlse

_

No.2 cylinder

rL

No.3 cylinder

n.... _

n.... __

No.4 cylinder ~

1 engine cycle

Sequential multiport fuel injection system

No. 1 cylinder jl No.2 cylinder jl

FUEL INJECTION TIMING Two types of systems are used.

Sequential

multiport fuel injection system

Fuel is injected into each cylinder during each engine cycle according to the firing order. This system is used when the engine is running.

----j MEF522D

n n

nn-

No. 3 cylinder

.n

n

rL-

No.4 cylinder

j1~

n....

rL-

f---

1 engine cycle

-l

Simultaneous


Fuel is injected simultaneously into all four cylinders twice each engine cycle. In other words, pulse signals of the same width are simultaneously transmitted from the ECM. The four injectors will then receive the signals two times for each engine cycle. This system is used when the engine is being started and/or if the fail-safe system (CPU) is operating.

Simultaneous multiport fuel injection system

FUEL SHUT-OFF MEF523D

Fuel to each cylinder is cut off during deceleration or operation of the engine and the vehicle at excessively high speeds.

EC-26

ENGINE AND EMISSION BASIC CONTROL SYSTEM DESCRIPTION Distributor Ignition (DI) System INPUT/OUTPUT

SIGNAL LINE







Throttle position


Throttle valve idle position Vehicle speed


Start signal

Ignition switch

*1


Power transistor

Engine knocking

Knock sensor Gear position

Neutral position/Inhibitor switch

Battery voltage

Battery *1: Except for Europe and Israel

SYSTEM DESCRIPTION

Tp (msec)

1.75 A

~ 1.50 .~

~ 1.25 "S

0.

1.00 o .~ 0.75 C

E 600

1,000 Engine

1,400 1,800 2,200 speed

(rpm)

N

SEF742M

The ignition timing is controlled by the ECM to maintain the best air-fuel ratio for every running condition of the engine. The ignition timing data is stored in the ECM. This data forms the map shown. The ECM receives information such as the injection pulse width and camshaft position sensor signal. Computing this information, ignition signals are transmitted to the power transistor . e.g., N: 1,800 rpm, Tp: 1.50 msec AOBTDC During the following conditions, the ignition timing is revised by the ECM according to the other data stored in the ECM. • At starting • During warm-up • At idle • Hot engine operation • During acceleration • During high-load operation (VTC on) - GA 16DE except for Europe and Israel Except for Europe and Israel The knock sensor retard system is designed only for emergencies. The basic ignition timing is programmed within the antiknocking zone, if recommended fuel is used under dry conditions. The retard system does not operate under normal driving conditions. If engine knocking occurs, the knock sensor monitors the condition. The signal is transmitted to the ECM (ECCS control module). The ECM retards the ignition timing to eliminate the knocking condition.

EC-27

•

ENGINE AND EMISSION BASIC CONTROL SYSTEM DESCRIPTION

~

Air Conditioning Cut Control INPUT/OUTPUT

SIGNAL LINE Air conditioner "ON" signal



Neutral position

Throttle valve opening angle


Engine speed





Air conditioner relay

Start signal

Ignition switch

Vehicle speed




SYSTEM DESCRIPTION This system improves acceler8.tion when the air conditioner is used. When the accelerator pedal is fully depressed, the air conditioner is turned off for a few seconds.

Fuel Cut Control (at no load & high engine speed) INPUT/OUTPUT

SIGNAL LINE Vehicle speed


Neutral position/Inhibitor

switch




Neutral position

Throttle position


Injectors


Engine speed

If the engine speed is above 2,500 rpm with no load (for example, in neutral and engine speed over 2,500 rpm) fuel will be cut off after some time. The exact time when the fuel is cut off varies based on engine speed. Fuel cut will operate until the engine speed reaches 2,000 rpm, then fuel cut is cancelled. NOTE: This function is different than deceleration control listed under "Multiport Fuel Injection (MFI) System" on EC-24.

EC-28

EVAPORATIVE EMISSION SYSTEM r--- -- - ---- -- - ----- ---------, To EGR I

Throttle valve

'1 EVAP canister purge control solenoid valve or '2 EGR valve & EVAP canister purge control solenoid valve

~ I

------------,

I I

I I

Intake manifold

I

I

,

valve

I 1

1 I

I I

Vacuum signal line

: I I I I I

I I

I I I I

Fuel check valve

'-

I I --

-

-

-

--

--

------

__

....J

'1 : GA 16DE M/T models except for Europe, Israel and Australia '2 : For Europe, Israel and Australia, and GA 15DE M/T models ~

: GA 15, 16DE AlT models except for Europe, Israel and Australia ..

Fuel filler cap with vacuum relief valve

: Air

Q : Fuel

vapor

EVAP canister

SEF126R

The evaporative emission system is used to reduce hydrocarbons emitted into the atmosphere from the fuel system. This reduction of hydrocarbons is accomplished by activated charcoals in the EVAP canister. The fuel vapor from sealed fuel tank is led into the EVAP canister when the engine is off. The fuel vapor is then stored in the EVAP canister. The EVAP canister retains the fuel vapor until the EVAP canister is purged by air. When the engine is running, the air is drawn through the bottom of the EVAP canister. The fuel vapor will then be led to the intake manifold. When the engine runs at idle, the EVAP canister purge control valve is closed. Only a small amount of vapor flows into the intake manifold through the constant purge orifice. As the engine speed increases and the throttle vacuum rises, the purge control valve opens. The vapor is sucked through both main purge and constant purge orifices.

Inspection EVAP CANISTER Check EVAP canister as follows: 1. Blow air in port @ and ensure that there is no leakage. 2. Apply vacuum to port @. [Approximately -13.3 to -20.0 kPa (-133 to -200 mbar, -100 to -150 mmHg, -3.94 to -5.91 inHg)] 3. Cover port CID with hand. 4. Blow air in port @ and ensure free flow out of port CID .

@Q

@

AEC664

EC-29

•

EVAPORATIVE EMISSION SYSTEM Inspection (Cont'd)

..

FUEL CHECK VALVE Check valve operation

"?

Fuel tank side

1.

QAir ...

Fuel vapor

..

2.

EVAP canister side

3.

Blow air through connector on fuel tank side. A considerable resistance should be felt and a portion of air flow should be directed toward the EVAP canister side. Blow air through connector on EVAP canister side. Air flow should be smoothly directed toward fuel tank side. If fuel check valve is suspected of not properly functioning in steps 1 and 2 above, replace it.

MEC744B

FUEL TANK VACUUM RELIEF VALVE 1. Wipe clean valve housing. 2. Suck air through the cap. A slight resistance accompanied by valve clicks indicates that valve A is in good mechanical condition. Note also that, by further sucking air, the resistance should disappear with valve clicks. 3. Blow air on fuel tank side and ensure that continuity of air passage exists through valve B. 4. If valve is clogged or if no resistance is felt, replace cap as an assembly.

~V""B Valve A Fuel tank side

SEF427N

EC-30

POSITIVE CRANKCASE VENTILATION Description This system returns blow-by gas to the intake manifold collector. The positive crankcase ventilation (peV) valve is provided to conduct crankcase blow-by gas to the intake manifold. During partial throttle operation of the engine, the intake manifold sucks the blow-by gas through the pev valve. Normally, the capacity of the valve is sufficient to handle any blow-by and a small amount of ventilating air. The ventilating air is then drawn from the air duct

into the crankcase. In this process the air passes through the hose connecting air inlet tubes to rocker cover. Under full-throttle condition, the manifold vacuum is insufficient to draw the blow-by flow through the valve. The flow goes through the hose connection in the reverse direction. On vehicles with an excessively high blow-by, the valve does not meet the requirement. This is because some of the flow will go through the hose connection to the intake manifold collector under all conditions.

For Europe and Israel, and GA15DE Cruising

Acceleration

or high load

pcv

valve

Filter

PCV valve operation Engine not running or backfiring

~~

GA16DE except for Europe and Israel Cruising

Acceleration

Idling or decelerating

or high load

-~

..

EC-31

Q: •

.~

Cruising

Acceleration or high load

.~

Fresh air : Blow-by gas SEF127R

•

POSITIVE CRANKCASE VENTILATION Inspection PCV (Positive Crankcase

Ventilation)

VALVE

With engine running at idle, remove PCV valve from rocker cover. A properly working valve makes a hissing noise as air passes through it. A strong vacuum should be felt immediately when a finger is placed over the valve inlet.

AEC904

PCV HOSE 1. Check hoses and hose connections for leaks. 2. Disconnect all hoses and clean with compressed hose cannot be freed of obstructions, replace.

ET277

EC-32

air. If any

BASIC SERVICE PROCEDURE

• FUEL PRES RELEASE.

D

FUEL PUMP WILL STOP BY TOUCHING START DURING IDLE. CRANK A FEW TIMES AFTER ENGINE STALL

---S-T~-RT--

Fuel Pressure Release Before disconnecting fuel line, release fuel pressure from fuel line to eliminate danger. (ij\ 1. Turn ignition switch "ON". ~ 2. Perform "FUEL PRESSURE RELEASE" in "WORK SUPPORT" mode with CONSULT. 3. Start engine. 4. After engine stalls, crank it two or three times to release all fuel pressure. 5. Turn ignition switch "OFF".

SEF823K

00 ~: 3. 4.

Remove fuse for fuel pump. • Start engine. After engine stalls, crank it two or three times to release all fuel pressure. Turn ignition switch off and reconnect fuel pump fuse.

SEF921P

Fuel Pressure Check • • • • • 1. 2. 3. 4. 5.

When reconnecting fuel line, always use new clamps. Make sure that clamp screw does not contact adjacent parts. Use a torque driver to tighten clamps. Use Pressure Gauge to check fuel pressure. Do not perform fuel pressure check with system operating. Fuel pressure gauge may indicate false readings. Release fuel pressure to zero. Disconnect fuel hose between fuel filter and fuel tube (engine side). Install pressure gauge between fuel filter and fuel tube. Start engine and check for fuel leakage. Read the indication of fuel pressure gauge. At idling: With vacuum hose connected Approximately 245 kPa (2.45 bar, 2.5 kg/cm2, 36 psi) With vacuum hose disconnected Approximately 294 kPa (2.94 bar, 3.0 kg/cm2, 43 psi) If results are unsatisfactory, perform Fuel Pressure Regulator Check.

Fuel Pressure Regulator Check Vacuum

Fuel pressure

.....

LTo pressure regulator

1.

Stop engine and disconnect fuel pressure regulator vacuum hose from intake manifold. 2. Plug intake manifold with a rubber cap. 3. Connect variable vacuum source to fuel pressure regulator. 4. Start engine and read indication of fuel pressure gauge as vacuum is changed. Fuel pressure should decrease as vacuum increases. If results are unsatisfactory, replace fuel pressure regulator.

SEF7188

EC-33

@[]

BASIC SERVICE PROCEDURE Injector Removal and Installation 1. 2. 3. • •

Release fuel pressure to zero. Remove injector tube assembly with injectors manifold. Remove injectors from injector tube assembly. Push injector tail piece. Do not pull on the connector.

from intake

Loosen in numerical order

~~2.27

"l!.ti!?n ~

4. Install injectors. • Clean exterior of injector tail piece. • Use new O-rings. • Face metal plate of upper insulator to injector. CAUTION: After properly connecting injectors to fuel tube assembly, connections for fuel leakage. 5. Assemble injectors to injector tube assembly. 6. Install injector tube assembly to intake manifold.

- 3.04 N.m (0.231 - 0.310 kg-m, 20.1. 26.9 in-Ib) Injector

r;m /

J~tf /"

Upper insulator

a-ring ~ ~ . ......--: ~

\

.

~ Engine front

o

0

Lower ins~~or

~

check

MEC741B

7.

Tighten fuel tube bolts to 7.86 - 10.8 N'm (0.801 - 1.10 kg-m, 5.8 - 8.0 ft-Ib) as shown in the figure. Then tighten the bolts to 15.7 - 20.6 N'm (1.60 - 2.10 kg-m, 11.6 -15.2 ft-Ib).

EC-34

BASIC SERVICE PROCEDURE Idle Speedllgnition Adjustment PREPARATION

Timinglldle

Mixture Ratio

(12) Evaporative emission system • On models equipped with air conditioner, checks should be carried out while the air conditioner is "OFF". • On models equipped with automatic transaxle, when checking idle speed, ignition timing and mixture ratio, checks should be carried out while shift lever is in "N" position. • When measuring "CO" percentage, insert probe more than 40 cm (15.7 in) into tail pipe .• • Turn off headlamps, heater blower, rear defogger. • Keep front wheels pointed straight ahead. • Make the check after the cooling fan has stopped.

•

Make sure that the following parts are in good order. (1) Battery (2) Ignition system (3) Engine oil and coolant levels (4) Fuses (5) ECM harness connector (6) Vacuum hoses (7) Air intake system (Oil filler cap, oil level gauge, etc.) (8) Fuel pressure (9)' Engine compression (10) Throttle valve (11) EGR valve operation For Europe and Israel and Australia, and GA15DE M/T models

Overall inspection sequence INSPECTION

Perform diagnostic test mode 1/ (Self-diagnostic results).

NG

Repair or replace.

Check & adjust ignition timing.

Check & adjust idle speed.

Check oxygen sensor*1 function. OK

Check oxygen sensor*1 harness.

NG

Repair or replace harness.

Check CO%.

OK

Replace oxygen sensor* 1.

NG

Check oxygen sensor*1 function.

NG Check emission control parts and repair or replace if necessary.

INSPECTION END

*1: Heated oxygen sensor (For Europe and Israel, and Australia AfT models) Oxygen sensor (Except for Europe and Israel, and Australia AfT models)

EC-35

OK

BASIC SERVICE PROCEDURE Idle Speed/Ignition Timinglldle Adjustment (Cont'd) ADJUSTING Engine models

@K] Mixture Ratio

VALUE GA14DE, GA16DE (For Europe and Israel)

GA16DE (For Australia)

GA15DE

GA16DE (Except for Europe and Israel, and Australia)

MfT Transaxle

(With daytime light system)

(Without daytime light system)

AfT (in "N" position)

MfT


MfT


MfT


Base idle speed (rpm) Idle speed (rpm) Ignition timing

625::t50

625::t 50

725::t50

580::t50

700::t 50

625::t50

725::t50

600::1:50

750::t50

800::t50

700::t50

800::t50

630::t 50

750::t 50

675::t50

800::t50

650::1:50

800::t 50

10::t2

10::t 2

10::t2

6::t2

6::t2

8::t2

8::t2

10::t2

10::t2

CBTDC)

EC-36

BASIC SERVICE PROCEDURE Idle Speed/Ignition Timing/Idle Adjustment (Cont'd)

eM] Mixture Ratio

START

SEF455Q

Visually check the following: • Air cleaner clogging • Hoses and ducts for leaks • Electrical connectors • Gasket • Throttle valve and throttle position sensor operation

•

m Start engine and warm it up until water temperature indicator points to the middle of gauge. Ensure engine stays below 1,000 rpm.

iii SEF247F

Open engine hood and run engine at about 2,000 rpm for about 2 minutes under no-load.

[iJ Perform ECM on-board diagnostic system (Diagnostic test mode II). OK

lNG Repair or replace components as necessary.

MALFUNCTION INDICATOR LAMP SEF217M

1

I!]

Run engine at about 2,000 rpm for about 2 minutes under no-load. Race engine two or three times under no-load, then run engine for about 1 minute at idle speed.

~

SEF248F

EC-37

BASIC SERVICE PROCEDURE Idle Speed/Ignition Timing/ldle Adjustment (Cont'd)

@] Mixture Ratio

@

Ii

l 1) Turn off engine and disconnect throttle position sensor harness connector. 2) Start engine.

Race engine (2,000 - 3,000 rpm) 2 or 3 times under no-load and then run engine at idle speed.

Ii Check ignition timing with a timing light. Ignition timing: Refer to EC-36.

lNG

OK

Adjust ignition timing to the specified value by turning distributor after loosening bolts which secure distributor. Ignition timing: Refer to EC-36.

(])

@

[!1 SEF695L

l

1) Turn off engine and disconnect throttle position sensor harness connector. 2) Start engine.

~ @

EC-38


1

@KJ Mixture Ratio

I

Check base idle speed. Refer to EC-36.

NG

OK

Race engine (2,000 - 3,000 rpm) 2 or 3 times under noload and run engine at idle speed.

III .

Adjust idle speed by turning idle speed adjusting screw . Base idle speed: Refer to EC-36.

1) Turn off engine and connect throttle position sensor harness connector. 2) Start engine.

1 Start engine. Race engine (2,000 - 3,000 rpm) 2 or 3 times under noload and run engine at idle speed.

t

EC-39

•

o

1:< MONITOR

1<

CMPS.RPM(REF) MIR F/C MNT

NO FAIL

BASIC SERVICE PROCEDURE Idle Speedllgnition Timing/Idle Adjustment (Cont'd)

0

@KJ Mixture Ratio

@

2000rpm RICH Check idle speed. Refer 10 EC-36.

NG

OK

Check IACV-AAC valve and replace if necessary.

__

R_E_C_O_R_D __

I SEF515Q

Check IACV-AAC valve harness and repair if necessary.

Check ECM function- by substituting another known good ECM. - ECM may be the cause of a problem, but this is rarely the case. SEF987K

o (ij\E

_ ~~:: ~~r l~~~~V (g~ ~

mJ

-~

Data link connector for CONSULT (Connect CHK and IGN terminals with a suitable harness.)

NG 1. See "MIA F/C MNT" in "Data monitor" mode. 2. Run engine at about 2,000 rpm for about 2 minutes under no-load. 3. Maintaining engine at 2,000 rpm under no-load (engine is warmed up sufficiently.), check that the monitor fluctuates between "LEAN" and "RICH" more than 5 times during 10 seconds. 1 lime: RICH -> LEAN -> RICH 2 limes: RICH -> LEAN -> RICH ->LEAN -> RICH

SEF909P

OR

Set "Oxygen sensor monitor" in diagnostic test mode II. (See page EC-47.) 2. Run engine at about 2,000 rpm for about 2 minutes under no-load. 3. Maintaining engine at 2,000 rpm under no-load, check that the malfunction indicator lamp on the instrument panel goes ON and OFF more than 5 times during 10 seconds. MALFUNCTION INDICATOR LAMP

OK SEF217M

END

EC-40


II For Australia

II

ECM

~

CONNECTORII

CD

~ DISCONNECT

46

18

II Check oxygen sensor*1 harness: 1) Turn off engine and disconnect battery

~

ground cable. 2) Disconnect ECM harness connector from ECM. 3) Disconnect oxygen sensor*1 harness connector. Then connect harness side terminal for

SEF056PA

II


II

19'

ECM

CONNECTOR

oxygen sensor*1 to ground with a jumper wire. 4) .Check for continuity between terminal No. 46 or No. 19 of ECM harness connector and body ground.

II

19

Continuity exists ................................................ OK Continuity does not exist .................................. NG OK

ACTIVE TEST.

COOLANTTEMP

0

lNG

I

SEF194R

•

Repair or replace harness .

Connect ECM harness connector to control unit.

20°C

===MONITOR=== CMPS.RPM (REF) INJ PULSE IGN TIMING

~

Orpm O.7msec 5BTDC

III

00 AEC681

DISCONNECT

10

!;j:~:~~'~";"'" Engine coolant temperature

@

2.5 k n resistor

1) Connect battery ground cable. 2) Select "ENG COOLANT TEMP" in "ACTIVE TEST" mode. 3) Set "COOLANT TEMP" to 20°C (68°F) by touching "au" "UP", "DWN".

~

00

~ Mixture Ratio

and "ad"

and

OR 1) Disconnect engine coolant temperature sensor harness connector. 2) Connect a resistor (2.5 kQ) between terminals of engine coolant temperature sensor harness connector.

[+] SEC242BA

Start engine and warm it up until water temperature indicator points to middle of gauge.

~ @

SEF455Q

EC-41

*1: Heated oxygen sensor (For Europe and Israel, a nd Australia AIT mod els) Oxygen sensor (Except for Europe and Isra el, and Australia AI T models)

•

BASIC SERVICE PROCEDURE Idle Speed/Ignition Timinglldle Adjustment (Cont'd)

~\\~\\\\""1"'1///1.

#'

7

~

{2{

6~ 7-=1 84

?1

:;::. ~o

@

5 ~

~

1

Ii

Race engine two or three times under no-load, then run engine at idle speed.

.;f

xl000 rlmin

~ Mixture Ratio

1 Check "CO"%.

SEF248F

Idle CO: Less than 10%

[!J After checking COOJo, 1) Touch "BACK".

00 @

1) Disconnect the resistor from terminals of engine coolant temperature sensor h.arness connector. 2) Connect engine coolant temperature sensor harness connector to engine coolant temperature sensor.

SEF913J

OK

NG 1;:( MONITOR

1;:( NO FAIL

0 Replace oxygen sensor'1.

CMPS.RPM(REF) MIR FIC MNT

2000rpm RICH

m

00 __

R_E_C_O_R_D __

I SEF515Q

1. See "M/R FIC MNT" in "Data monitor" mode. 2. Maintaining engine at 2,000 rpm under no-load (engine is warmed up sufficiently.), check that the monitor fluctuates between "LEAN" and "RICH" more than 5 times during 10 seconds. 1 time : RICH -> LEAN -> RICH 2 times: RICH -> LEAN -+ RICH -> LEAN -> RICH OR

Ii)

@

1. Set "Oxygen sensor monitor" in diagnostic test .mode II. (See page EC-47.) 2. Maintaining engine at 2,000 rpm under no-load, check that the malfunction indicator lamp on the instrument panel goes ON and OFF more than 5

SEF987K

times during 10 seconds.

I NG

OK

~~~~N

l~~i~V-=~ (gJ~

@

-~


@ '1: Heated oxygen and Israel, and els) Oxygen sensor and Israel, and els)

SEF909P

EC-42

sensor (For Europe Australia AIT mod(Except for Europe Australia AIT mod-


[]KJ Mixture Ratio

@

Connect oxygen sensor harness connector to oxygen sensor.

Check fuel pressure regulator. (See page EC-33.)

. Check mass air flow sensor and its circuit. (See page EC-107.)

Check injector and its circuit. (See page EC-141.) Clean or replace if necessary.

Check engine coolant temperature sensor and its circuit. (See page EC-112.)

Check ECM function* by substituting another known good ECM.

*. ECM may be the caus e of a problem, but this is rarely the c ase.

EC-43

•

ON-BOARD DIAGNOSTIC SYSTEM DESCRIPTION Malfunction Indicator lamp (Mil)

'e/' \

-

1. The malfunction indicator lamp will light up when the ignition switch is turned ON without the engine running. This is a bulb check. • If the malfunction indicator lamp does not light up, refer to EL section ("WARNING LAMPS AND CHIME") or see

I /

CHECK-

/

.......

/

EC-223.

I \

2. When the engine is started, the malfunction indicator lamp should go off.

Malfunction indicator lamp SEF051PA

Condition

Diagnostic Test Mode I

Diagnostic Test Mode II

BULB CHECK

SELF-DIAGNOSTIC RESULTS

Engine stopped Ignition switch in "ON" position

~ Engine running

ID

~

MALFUNCTION WARNING

*1

OXYGEN SENSOR MONITOR

*1: Heated oxygen sensor (For Europe and Israel, and Australia AIT models) Oxygen sensor (Except for Europe and Israel, and Australia AIT models)

EC-44

ON-BOARD DIAGNOSTIC SYSTEM DESCRIPTION Malfunction Indicator lamp (Mil) (Cont'd) Turn ignition switch "ON". (Do not start engine.)

Diagnostic Test Mode I -

HOW TO SWITCH DIAGNOSTIC TEST MODES

BULB CHECK

Diagnostic Test Mode I - MALFUNCTION WARNING

o,~yr;;~N

•

~-~ Data link connector for CONSULT (Connect CHK and IGN terminals with a suitable harness.)

(Turn diagnostic test mode selector on ECM fully clockwise.)

Wait at least 2 seconds.

O,~/~N ~-~ Data link connector for CONSULT (Disconnect CHK and IGN terminals with a suitable harness.)

(Turn diagnostic test mode selector fully counterclockwise.)

DIAGNOSTIC TEST MODE II - SELF-DIAGNOSTIC RESULTS

Q~

~ ON

~

Diagnostic Test Mode II - OXYGEN SENSOR MONITOR*1

S art engine.

0'

~~~~~ ~~r ~!~~:V [gJ~ -~


Wait at least 2 seconds.

1

Ol

or

g2g~E;V ~~~;::

~~

W:jr

-~

Data link connector for CONSULT (Disconnect CHK and IGN terminals with a suitable harness.)

EC-45

• Switching the modes is not possible when the engine is running. • When ignition switch is turned off during diagnosis, power to ECM will drop after approx. 5 second. The diagnosis will automatically return to Diagnostic Test Mode I. • Turn back diagnostic test mode selector to the fully counterclockwise position whenever vehicle is in use. *1: Heated oxygen sensor (For Europe and Israel, and Australia AfT models) Oxygen sensor (Except for Europe and tsrael, and Australia AfT models)

ON-BOARD DIAGNOSTIC SYSTEM DESCRIPTION Malfunction Indicator lamp (Mil) (Cont'd)

@KJ

DIAGNOSTIC TEST MODE I-BULB CHECK In this mode, the MALFUNCTIONINDICATOR LAMP on the instrument panel should stay ON. If it remains OFF, check the bulb. Refer to EL section ("WARNING LAMPS AND CHIME") or see EC-223. DIAGNOSTIC

TEST MODE I-MALFUNCTION

WARNING

MALFUNCTION INDICATOR LAMP

Condition Engine coolant temperature

ON

OFF

•

sensor circuit malfunction

or overheating

is detected, or

the ECM's CPU is malfunctioning. No malfunction.

These Diagnostic Trouble Code Numbers are clarified in Diagnostic Test Mode II (SELF-DIAGNOSTIC RESULTS).

DIAGNOSTIC

TEST MODE II-SELF-DIAGNOSTIC

RESULTS

In this mode, a diagnostic trouble code is indicated by the number of blinks of the MALFUNCTION INDICATOR LAMP as shown below. Example: Diagnostic trouble code No. 12 and No. 43 0.6

03

111-'1

ON

0.3

0.6

II

OFF

~

j

~~

Q9

O~

-I.

--.1 -4--1-21 OB

'--------v------~

'--------v----'

Diagnostic trouble code No. 12

Q9

2.1


Unit: second AEC490

Long (0.6 second) blinking indicates the number of ten digits, and short (0.3 second) blinking indicates the number of single digits. For example, the malfunction indicator lamp blinks 4 times for about 2.5 seconds (0.6 sec x 4 times) and then it blinks three times for about 1 second (0.3 sec x 3 times). This indicates the DTC "43" and refers to the malfunction of the throttle position sensor. In this way, all the detected malfunctions are classified by their diagnostic trouble code numbers. The DTC "55" refers to no malfunction. (See DIAGNOSTIC TROUBLE CODE CHART, refer to EC-62.) HOW TO ERASE DIAGNOSTIC TEST MODE II (Self-diagnostic results) The diagnostic trouble code can be erased from the backup memory in the ECM when the diagnostic test mode is changed from Diagnostic Test Mode II to Diagnostic Test Mode I. (Refer to "HOW TO SWITCH DIAGNOSTIC TEST MODES" on previous page.) •

If the battery terminal is disconnected, memory within 24 hours.

•

Be careful not to erase the stored memory • SELF-DIAG RESULTS. FAILURE DETECTED NATS MALFUNCTION

•

0

TIME 0

•

•

I

ERASE

II

PRINT

I SEF288Q

the diagnostic

trouble

code will be lost from the backup

before startin~ trouble diagnoses.

If the MIL blinks or "NATS MALFUNCTION" is displayed on "SELF-OIAG RESULTS" screen, perform self-diagnostic results mode with CONSULT using NATS program card (NATS-E940). Refer to EL section. Confirm no self-diagnostic results of NATS is displayed before touching "ERASE" in "SELF-DIAG RESULTS" mode with CONSULT. When replacing ECM, initialisation of NATS V2.0 system and registration of all NATS V2.0 ignition key 10s must be carried out with CONSULT using NATS program card (NATSE940). Therefore, be sure to receive all keys from vehicle owner. Regarding the procedures of NATS initialisation and NATS ignition key 10 registration, refer to CONSULT operation manual, NA TS V2.0.

EC-46

ON-BOARD DIAGNOSTIC SYSTEM DESCRIPTION Malfunction Indicator lamp (Mil) (Cont'd) DIAGNOSTIC TEST MODE II-OXYGEN

[QKJ

SENSOR*1 MONITOR

In this mode, the MALFUNCTION INDICATOR LAMP displays rich) which is monitored by the oxygen sensor*1.

the condition


Fuel mixture condition in the exhaust gas

ON

Lean

OFF

Rich

*2 Remains ON or OFF

Any condition

of the fuel mixture

(lean or

Air fuel ratio feedback control condition Closed loop system Open loop system

*2: Maintains conditions just before switching to open loop.

To check the oxygen sensor*1 function, start engine in Diagnostic Test Mode II. Then warm it up until engine coolant temperature indicator points to middle of gauge. Next run engine at about 2,000 rpm for about 2 minutes under no-load conditions. Make sure that the MALFUNCTION INDICATOR LAMP comes ON more than 5 times within 10 seconds with engine running at 2,000 rpm under no-load. . *1: Heated oxygen sensor (For Europe and Israel, and Australia AfT models) Oxygen sensor (Except for Europe and Israel, and Australia AfT models)

EC-47

•

ON-BOARD DIAGNOSTIC SYSTEM DESCRIPTION CONSULT CONSULT INSPECTION

PROCEDURE

1. Turn off ignition switch. 2. Connect "CONSULT" to data link connector for CONSULT. (Data link connector for CONSULT is located behind the fuse box cover.)

for CONSULT

E3==/

3. Turn on ignition switch. 4. Touch "START".

NISSAN

CONSULT EE940

+: Program

card

AE930: For Australia EE940: Except for Australia

+

!DiI

II

START SUB MODE

I

I

SEF253Q

~

I

SELECT~S_Y_S_T_EM

5. Touch "ENGINE".

ENGINE----~

SEFS95K

~

SELECT

DIAG MODE

WORK SUPPORT SELF-DIAG

RESULTS

lill

I

6. Perform each diagnostic test mode according to each service procedure. For further information,

I

DATA MONITOR

I I I

ACTIVE TEST ECM PART NUMBER FUNCTION

TEST SEF136P

EC-48

see the CONSULT Operation

Manual.

ON-BOARD DIAGNOSTIC SYSTEM DESCRIPTION CONSULT (Cont'd) ECCS COMPONENT

PARTS/CONTROL

SYSTEMS APPLICATION DIAGNOSTIC

Item

WORK SUPPORT


lll:

< ~ IZ UJ

ACTIVE

MONITOR

TEST

FUNCTION TEST

X

X


X

X


X

X

Oxygen sensor'1

X

X

X

X

X

X

X

X

Intake air temperature sensor.'2

X

X

Knock sensor'3

X


I/)

DATA



INPUT

TEST MODE

X

X

Ignition switch (start signal)

X

X

Closed throttle position

X

X


X

Park/Neutral position switch

X

X X

z ~


X

Electrical load signal

X

0

Battery voltage

X

I/)

Injectors

X

X

X

X

X

X

X

X

X

Valve timing control solenoid valve

X

X

X


X X

X

X

X

X

X

X

X

X

X

X

X

0

:E

u u u UJ

OUTPUT

Power transistor (Ignition timing)

X

IACV-AAC valve

X

X

Fuel pump relay Cooling fan EVAP canister purge control solenoid valve'4 EGR valve & EVAP canister purge control solenoid valve'5

X: Applicable '1: Heated oxygen sensor (For Europe and Israel, and Australia AIT models) Oxygen sensor (Except for Europe and Israel, and Australia AIT models) '2: For Australia '3: Except for Australia '4: GA16DE MIT models except for Europe and Israel, and Australia '5: For Europe and Israel and Australia, and GA15DE MIT models

EC-49

X (Ignition signal)

•

ON-BOARD DIAGNOSTIC SYSTEM DESCRIPTION CONSULT (Cont'd) FUNCTION Diagnostic test mode

Function A technician can adjust some devices faster and more accurately by following

Work support

indications Self-diagnostic

Self-diagnostic results can be read and erased quickly.

results

Data monitor

Active

on CONSULT.

Input/Output data in the ECM can be read. CONSUL T drives some actuators apart from the ECM's and also shifts some parameters in a specified range.

test

ECM part numbers

ECM part numbers can be read.

Function test

Conducted by CONSULT instead of a technician to determine whether each system is "OK" or "NG".

WORK SUPPORT MODE WORK ITEM THRTL POS SEN ADJ

CONDITION CHECK THE THROTTLE POSITION SENSOR SIGNAL. ADJUST iT TO THE SPECIFIED VALUE BY ROTATING THE SENSOR BODY UNDER THE FOLLOWiNG CONDITIONS . • IGN SW "ON" • ENG NOT RUNNING

USAGE When adjusting throttle position sensor initial position

• ACC PEDAL NOT PRESSED IGNITION TIMING ADJ

IACV-AAC VALVE ADJ

• IGNITION TIMING FEEDBACK CONTROL WILL BE HELD BY TOUCHING "START". AFTER DOING SO, ADJUST IGNITION TIMING WITH A TIMING LIGHT BY TURNING THE CAMSHAFT POSITION SENSOR.

When adjusting

initial ignition

timing

-

SET ENGINE SPEED AT THE SPECIFIED VALUE UNDER THE FOllOWING CONDITIONS . • ENGINE WARMED UP • NO-LOAD

FUEL PRESSURE RELEASE

• FUEL PUMP Will DURING IDLING.

STOP BY TOUCHING "START"

CRANK A FEW TIMES AFTER ENGINE STALLS.

EC-50

When releasing from fuel line

fuel pressure

ON-BOARD DIAGNOSTIC SYSTEM DESCRIPTION CONSULT (ConI' d) SELF-DIAGNOSTIC

MODE

Regarding items detected Chart" (Refer to EC-62.)

DATA MONITOR Monitored item [Unit]

MAS AIR/FL SE [V] COOLAN TEMP/S ['C] or ['F]

02 SENSOR [V]

Main signals

THRTL POS SEN [V] INT/A TEMP SE ['C] or ['F]*2

START SIGNAL [ON/OFF] CLSD THLIPOSI [ON/OFF]

AIR COND SIG [ON/OFF] PIN POSI SW [ON/OFF] PW/ST SIGNAL [ON/OFF]

NOTE: Any monitored matically.

Trouble

Code (DTC)

Description

Remarks

• Indicates the engine speed computed from the REF signal (180' signal) of the camshaft position sensor.

• Accuracy becomes poor if engine speed drops below the idle rpm. • If the signal is interrupted while the engine is running, an abnormal value may be indicated .

0

0

0

• The signal voltage of the mass air flow sensor is displayed .

• When the engine is stopped, a certain value is indicated.

0

0

• The engine coolant temperature (determined by the signal voltage of the engine coolant temperature sensor) is displayed.

• When the engine coolant temperature sensor is open or short-circuited, ECM enters fail-safe mode. The engine coolant temperature determined by the ECM is displayed .

0

0

• The signal voltage of the oxygen sensor*1 is displayed .

0

• Display of oxygen sensor signal during air-fuel ratio feedback control: RICH ... means the mixture became "rich", and control is being affected toward a leaner mixture. LEAN ... means the mixture became "lean", and control is being affected toward a rich mixture .

0

BATTERY VOLT [V]

mode, refer to "Diagnostic

0

M/R F/C MNT [RICH/LEAN]

VHCL SPEED SE [km/h] or [mph]

RESULTS"

MODE ECM input signals

CMPS.RPM (REF) [rpm]

in "SELF-DIAG

0 0 0

0 0 0

0

0

0

0 0

0 0

0

• The vehicle speed computed from the vehicle speed sensor signal is displayed . • The power supply voltage of ECM is displayed . • The throttle position sensor signal voltage is displayed. • The intake air temperature determined by the signal voltage of the intake air temperature sensor is indicated.

0 0

• After turning ON the ignition switch, "RICH" is displayed until air-fuel mixture ratio feedback control begins. • When the air-fuel ratio feedback is clamped, the value just before the clamping is displayed continuously.

0

• Indicates [ON/OFF] condition from the starter signal.

• After starting the engine, [OFF] is displayed regardless of the starter signal.

• Indicates the closed throttle position [ON/OFF] determined by the throttle position sensor signal. ON: Closed throttle position OFF:Other than closed throttle position • Indicates [ON/OFF] condition of the air conditioner switch as determined by the air conditioning signal. • Indicates [ON/OFF] condition from the park/neutral position switch signal. • Indicates [ON/OFF] condition of the power steering oil pressure switch determined by the power steering oil pressure signal.

item that does not match the vehicle being diagnosed

*1: Heated oxygen sensor (For Europe and Israel, and Australia A/T models) Oxygen sensor (Except for Europe and Israel, and Australia A/T models) *2: For Australia

EC-51

is deleted from the display auto-

•

ON-BOARD DIAGNOSTIC SYSTEM DESCRIPTION CONSULT (Coni' d) Monitored item [Unit]

ECM input signals

Main signals

Description

0

• Indicates [ON/OFF] condition from the rear defogger signal and/or lighting switch. ON: Rear defogger is operating and/or lighting switch is on. OFF: Rear defogger is not operating and lighting switch is not on.

0

• Indicates the actual fuel injection pulse width compensated by ECM according to the input signals.

0

• Indicates the ignition timing computed by ECM according to the input signals.

0

• Indicates the idle air control valve (AAC valve) control value computed by ECM according to the input signals.

LOAD SIGNAL [ON/OFF]

0 INJ PULSE [msec]

IGN TIMING [BTDC]

IACV-AACIV [%]

A/F ALPHA [%]

AIR COND RLY [ON/OFF] COOLING FAN*2 [ON/OFF] or [LOW/ HI/OFF]

FUEL PUMP RLY [ON/OFF]

0

• Indicates the mean value of the airfuel ratio feedback correction factor per cycle.

0

• Indicates the air conditioner relay control condition (determined by ECM according to the input signal).

0

• Indicates the control condition of the cooling fans (determined by ECM according to the input signal). ON ... Operating LOW ... Operates at low speed HI ... Operates at high speed OFF ... Stopped

0

• Indicates the fuel pump relay control condition determined by ECM according to the input signals.

VALVE TIM SOL*1 [ON/OFF]

• The control condition of the valve timing solenoid valve (determined by ECM according to the input signal) is indicated. ON ... VTC operating OFF ... VTC not operating

EGRC SOLIV (EVAP canister purge control solenoid valve or EGR & EVAP canister purge control solenoid valve) [ON/OFF]

• Indicates the control condition of the EVAP canister purge control solenoid valve or EGR valve & EVAP canister purge control solenoid valve (determined by ECM according to the input signal). ON '" EVAP canister purge operation cut-off OFF ... EVAP canister purge operation not cut-off

0

VOLTAGE [V]

• Voltage measured by the voltage probe.

PULSE [msec] or [Hz] or [%]

• Pulse width, frequency or duty cycle measured by the pulse probe.

Remarks

• When the engine is stopped, a certain computed value is indicated.

• When the engine is stopped, a certain value is indicated. • This data also includes the data for the air-fuel ratio learning control.

• Only "#" is displayed if item is unable to be measured . • Figures with "#"s are temporary ones. They are the same figures as an actual piece of data which was just previously measured.

*1: GA16DE except for Europe and Israel *2: GA16DE engine A/T models for Europe without heavy duty kit have a 2- step control [ON/OFF] system. "LOW" and "HI" are shown on CONSULT screen to represent "ON" condition.

EC-52

ON-BOARD DIAGNOSTIC SYSTEM DESCRIPTION CONSULT (Cont'd) ACTIVE TEST MODE TEST ITEM

CONDITION

• Engine: Return to the original trouble condition FUEL INJECTION • Change the amount of fuel injection using CONSULT.

JUDGEMENT

CHECK ITEM (REMEDY)

If trouble symptom disappears, see CHECK ITEM.

• Harness and connector • Fuel injectors • Oxygen sensor*1

IACV-AACIV OPENING

• Engine: After warming up, idle the engine. • Change the IACV-AAC valve opening percent using CONSULT.

Engine speed changes according to the opening percent.

• Harness and connector • IACV-AAC valve

ENG COOLANT TEMP

• Engine: Return to the original trouble condition • Change the engine coolant . temperature indication using CONSULT.


• Harness and connector • Engine coolant temperature sensor • Fuel injectors

• Engine: Return to the original trouble condition If trouble symptom disappears, IGNITION TIMING • Timing light: Set see CHECK ITEM. • Retard the ignition timing using CONSULT.

• Adjust initial ignition timing

POWER BALANCE

• Engine: After warming up, idle the engine. • A/C switch "OFF" Engine runs rough or dies . • Shift lever "N" • Cut off each injector signal one at a time using CONSULT.

• • • • • •

Harness and connector Compression Injectors Power transistor Spark plugs Ignition coils

COOLING FAN*3

• Ignition switch: ON • Turn the cooling fan "ON" and "OFF", or "LOW" and "HI" and "OFF" using CONSULT.

Cooling fan moves and stops.

• Harness and connector • Cooling fan motor

FUEL PUMP RELAY

• Ignition switch: ON (Engine stopped) • Turn the fuel pump relay "ON" and "OFF" using CONSULT and listen to operating sound.

Fuel pump relay makes the operating sound.

• Harness and connector • Fuel pump relay

EGRC SOLENOID VALVE (EVAP canister • Ignition switch: ON purge control • Turn solenoid valve "ON" and solenoid valve or "OFF" with the CONSULT and EGR valve & listen to operating sound. EVAP canister purge control solenoid valve)

Solenoid valve makes an operating sound.

• Harness and connector • Solenoid valve

VALVE TIMING SOL*2

• Ignition switch: ON • Turn solenoid valve "ON" and "OFF" using CONSULT and listen to operating sound.



SELF-LEARNING CONT

• In this test, the coefficient of self-learning control mixture ratio returns to the original coefficient by touching "CLEAR" on the screen.

*1: Heated oxygen sensor (For Europe and Israel, and Australia A/T models) Oxygen sensor (Except for Europe and Israel, and Australia A/T models) *2: GA16DE except for Europe and Israel *3: GA16DE engine A/T models for Europe without heavy duty kit have a 2- step control [ON/OFF] system. "LOW" and "HI" are shown on CONSULT screen to represent "ON" condition.

EC-53

•

ON-BOARD DIAGNOSTIC SYSTEM DESCRIPTION CONSULT (Cont'd) FUNCTION TEST MODE FUNCTION TEST ITEM

SELF-DIAG RESULTS

CONDITION • Ignition switch: ON (Engine stopped)

• Closed throllle position is tested when throttle is opened and closed fully.

PARK/NEUT POSI SW CKT

Throttle valve: opened

Objective system

OFF

• Harness and connector • Throllle position sensor • Throllie position sensor adjustment

ON

• Throttle linkage • Verify operation in DATA MONITOR mode.

Range (Throllle valve fully opened - Throllle valve fully closed)

More than 3.DV

• Harness and connector • Throttle position sensor • Throllle position sensor adjustment • Throllie linkage • Verify operation in DATA MONITOR mode .

• Ignition switch: ON (Engine stopoed)

Out of NIP positions

OFF

• Inhibitor/NelJlral position switch circuit is tested when shift lever is manip-

In NIP positions

ON

(Closed throllie position is selected by throttle position sensor.)

THROTTLE POSI SEN CKT

CHECK ITEM (REMEDY)

-

• Displays the results of onboard diagnostic system . • Ignition switch: ON (Engine stopped)

CLOSED THROTTLE POSI

JUDGEMENT

• Ignition switch: ON (Engine stopped) • Throllle position sensor circuit is tested when throllie is opened and closed fully.

Throttle valve: closed

• Harness and connector • Neutral position switch or inhibitor switch • Linkage or inhibitor switch adjustment

ulated .

FUEL PUMP CIRCUIT

• Ignition switch: ON (Engine stopped) • Fuel pump circuit is tested by checking the pulsation in fuel pressure when fuel

There is pressure pulsation on the fuel feed hose.

tube is pinched .

EGRC SOllV CIRCUIT (EVAP canister purge control solenoid valve or

• Ignition switch: ON (Engine stopped) • EVAP canister purge control solenoid valve or EGR

EGR valve & EVAP canister purge control solenoid valve)

valve & EVAP canister purge control solenoid valve circuit is tested by checking solenoid valve operating noise .

VALVE TIMING SIV CKT*1

• Ignition switch: ON (Engine stopped) • Valve timing SIV circuit is tested by checking solenoid valve operating sound

• • • • •

Harness and connector Fuel pump Fuel pump relay Fuel filter clogging Fuel level

• Harness and connector The solenoid valve makes an operating sound every 3 seconds.

The solenoid valve makes an operating sound periodically.

'1: GA16DE except for Europe and Israel

EC-54

• EVAP canister purge control solenoid valve or EGR valve & EVAP canister purge control solenoid valve

• Harness and connector • Valve timing solenoid valve

ON-BOARD DIAGNOSTIC SYSTEM DESCRIPTION CONSULT (Conl'd) FUNCTION TEST ITEM

CONDITION

JUDGEMENT

CHECK ITEM (REMEDY)

COOLING FAN CIRCUIT

• Ignition switch: ON (Engine stopped) • Cooling fan circuit is tested when cooling fan is rotated .

The cooling fan rotates and stops every 3 seconds.

• Harness and connector • Cooling fan motor • Cooling fan relay

START SIGNAL CIRCUIT

• Ignition switch: ON -. START • Start signal circuit is tested when engine is started by operating the starter. Before cranking, battery voltage and engine coolant temperature are displayed. During cranking, average battery voltage, mass air flow sensor output voltage and cranking speed are displayed .

Start signal: OFF -. ON

• Harness and connector • Ignition switch

PW/ST SIGNAL CIRCUIT

• Ignition switch: ON (Engine running) • Power steering circuit is tested when steering wheel is rotated fully and then set to a straight line running position .

Locked position

ON

Neutral position

OFF

• Harness and connector • Power steering oil pressure switch • Power steering pump

VEHICLE SPEED SEN CKT

• Vehicle speed sensor circuit is tested when vehicle Vehicle speed sensor input signal is is running at a speed of 10 greater than 4 km/h (2 MPH) km/h (6 MPH) or higher .

• Harness and connector • Vehicle speed sensor • Electric speedometer

IGN TIMING ADJ

• After warming up, idle the engine. • Ignition timing adjustment is checked by reading ignition timing with a timing light and checking whether it agrees with specifications.

• Adjust ignition timing (by moving camshaft position sensor or distributor) • Camshaft position sensor drive mechanism

MIXTURE RATIO TEST

The timing light indicates the same value on the screen.

• Air-fuel ratio feedback circuit (injection system, ignition system, vacuum Oxygen sensor'1 COUNT: More than 5 system, etc.) is tested by times during 10 seconds examining the oxygen sensor'1 output at 2,000 rpm under non-loaded state.

'1: Heated oxygen sensor (For Europe and Israel, and Australia AIT models) Oxygen sensor (Except for Europe and Israel, and Australia A/T models)

EC-55

• INJECTION SYS (Injector, fuel pressure regulator, harness or connector) • IGNITION SYS (Spark plug, power transistor, ignition coil, harness or connector) • VACUUM SYS (Intake air leaks) • Oxygen sensor'1 circuit • Oxygen sensor'1 operation • Fuel pressure high or low • Mass air flow sensor

•

ON-BOARD DIAGNOSTIC SYSTEM DESCRIPTION CONSULT (Cont'd) FUNCTION TEST ITEM

POWER BALANCE

CONDITION • After warming up, idle the engine . • Injector operation of each cylinder is stopped one after another, and resultant change in engine rotalion is examined to evaluate combustion of each cylinder. (This is only dis-

JUDGEMENT

CHECK ITEM (REMEDY)

• Injector circuit (Injector, harness or connector) Difference in engine speed is greater than 25 rpm before and after cutting off the injector of each cylinder.

played for models where a sequential multi port fuel

• Ignition circuit (Spark plug, power transistor, ignition coil, harness or connector) • Compression • Valve timing

injection system is used.)

IACV-AACIV SYSTEM

• After warming up, idle the engine. • IACV-AAC valve system is Difference in engine speed is greater tested by detecting change than 150 rpm between when valve openin engine speed when ing is at 80% and at 20%. IACV-AAC valve opening is changed to 0%, 20% and 80%.

EC-56

• Harness and connector • IACV-AAC valve • Air passage restriction between air inlet and IACV-AAC valve • IAS (Idle adjusting screw) adjustment

[]K]

ON-BOARD DIAGNOSTIC SYSTEM DESCRIPTION CONSULT (Cont'd) REAL TIME DIAGNOSIS IN DATA MONITOR MODE

CONSULT has two kinds of triggers and they can be selected by touching "SETTING" in "DATA MONITOR" mode. 1. "AUTO TRIG" (Automatic trigger): • The malfunction will be identified on the CONSULT screen in real time. In other words, DTC and malfunction item will be displayed at the moment the malfunction is detected by ECM. DATA MONITOR can be performed continuously until a malfunction is detected. However, DATA MONITOR cannot continue any longer after the malfunction detection. 2. "MANU TRIG" (Manual trigger): • DTC and malfunction item will not be displayed automatically on CONSULT screen even though a malfunction is detected by ECM. • DATA MONITOR can be performed continuously even though a malfunction is detected. Use these triggers as follows: 1. "AUTO TRIG" • While trying to detect the DTC by performing the "DTC CONFIRMATION PROCEDURE", be sure to select to "DATA MONITOR (AUTO TRIG)" mode. You can confirm the malfunction at the moment it is detected. • While narrowing down the possible causes, CONSULT should be set in "DATA MONITOR (AUTO TRIG)" mode, especially in case the incident is intermittent. Inspect the circuit by gently shaking (or twisting) suspicious connectors, components and harness in the "DTC CONFIRMATION PROCEDURE". The moment a malfunction is found the DTC will be displayed. (Refer to GI section, "Incident Simulation Tests" in "HOW TO PERFORM EFFICIENT DIAGNOSIS FOR AN ELECTRICAL INCIDENT".) 2. "MANU TRIG" • If the malfunction is displayed as soon as "DATA MONITOR" is selected, reset CONSULT to "MANU TRIG". By selecting "MANU TRIG" you can monitor and store the data. The data can be utilized for further diagnosis, such as a comparison with the value for the normal operating condition.

I~

SELECT

MONITOR

ITEM

ECM INPUT SIGNALS

SETTING

II

FROM

SET RECORDING

AUTO TRIG HI SPEED

MAIN SIGNALS SELECTION

I~

I I

COND

MANU TRIG

MANU TRIG LONG TIME

HI SPEED

MENU

START

___ "SETTIN-G"

1__ "AUTO TRIG"

1 "MANU

TRIG"

A malfunction can be

A malfunction

displayed on "DATA

displayed on "DATA

MONITOR" screen

MONITOR"

automatically

automatically

if detected.

can not be

screen even if

detected.

SEF674Q

EC-57

TROUBLE DIAGNOSIS -

General Description

Introduction Sensors ~

ECM

Actuators

~~.~

MEF036D

The engine has an ECM to control major systems such as fuel control, ignition control, idle air control system, etc. The ECM accepts input signals from sensors and instantly drives actuators. It is essential that both input and output signals are proper and stable. At the same time, it is important that there are no problems such as vacuum leaks, fouled spark plugs, or other problems with the engine. It is much more difficult to diagnose a problem that occurs intermittently rather than continuously. Most intermittent problems are caused by poor electric connections or improper wiring. In this case, careful checking of suspected circuits may help prevent the replacement of good parts. A visual check only may not find the cause of the problems. A road test with CONSULTor a circuit tester connected should be performed. Follow the "Work Flow" on the next page. Before undertaking actual checks, take just a few minutes to talk with a customer who approaches with a driveability complaint. The customer can supply good information about such problems, especially intermittent ones. Find out what symptoms are present and under what conditions they occur. A "Diagnostic Worksheet" like the example on EC-61 should be used. Start your diagnosis by looking for "conventional" problems first. This will help troubleshoot driveability problems on an electronically controlled engine vehicle.

SEF234G

EC-58

TROUBLE DIAGNOSIS -

General Description

Work Flow CHECK IN

Listen to customer complaints.

(Get symptoms.)

................................................

Check, print out or write down, and erase Diagnostic Trouble Code (DTC). Symptoms collected.

STEP I

..

STEP II

No symptoms, but Malfunction Code exists at STEP II.

Verify the symptom by driving in the conditiOn the customer described. Normal Code (at STEP II)

.........................................................................................

*1

STEP III

Malfunction Code (at STEP II)

Verify the DTC by performing

Choose the appropriate

the "DTC CONFIRMATION PROCEDURE".

..

.

action.

*1 STEP IV

STEP V

*2

Malfunction

Code (at STEP II or IV)

Normal Code (at both STEP II and IV) BASIC INSPECTION SYMPTOM BASIS (at STEP I or III)

Perform inspections according to Symptom Matrix Chart.

STEP VI

TROUBLE DIAGNOSIS FOR DTC XX.

REPAIR/REPLACE

NG

FINAL CHECK Confirm that the incident is completely fixed by performing BASIC INSPECTION and DTC CONFIRMATION PROCEDURE (or OVERALL FUNCTION CHECK).

..........................................

STEP VII

CHECK OUT

*1: If the incident cannot be duplicated, refer to GI section ("Incident Simulation Tests", "HOW TO PERFORM EFFICIENT DIAGNOSIS FOR AN ELECTRICAL INCIDENT"). *2: If the on-board diagnostic system cannot be performed, check main power supply and ground circuit. Refer to "TROUBLE DIAGNOSIS FOR POWER SUPPLY", EC-88.

EC-59

•

TROUBLE DIAGNOSIS -

General oescrip_ti_on

I_G_A_'

Description for Work Flow STEP STEP I

DESCRIPTION Get detailed information about the conditions and the environment when the incident/symptom occurred using the "DIAGNOSTIC WORKSHEET" as shown on the next page.

STEP II

Before confirming the concern, check and write down (print out using CONSULT) the Diagnostic Trouble Code (DTC), then erase the code. The DTC can be used when duplicating the incident at STEP III & IV. Study the relationship between the cause, specified by DTC, and the symptom described by the customer. (The "Symptom Matrix Chart" will be useful. Refer to EC-72.)

STEP III

Try to confirm the symptom and under what conditions the incident occurs. The "DIAGNOSTIC WORK SHEET" is useful to verify the incident. Connect CONSULT to the vehicle in DATA MONITOR (AUTO TRIG) mode and check real time diagnosis results. If the incident cannot be verified, perform INCIDENT SIMULATION TESTS. Refer to GI section. If the malfunction code is detected, skip STEP IV and perform STEP V.

STEP IV

Try to detect the Diagnostic Trouble Code (DTC) by driving in (or performing) the "DTC CONFIRMATION PROCEDURE". Check and read the DTC by using CONSULT. During the DTC verification, be sure to connect CONSULT to the vehicle in DATA MONITOR (AUTO TRIG) mode and check real time diagnosis results. If the incident cannot be verified, perform INCIDENT SIMULATION TESTS. Refer to GI section. In case the "DTC CONFIRMATION PROCEDURE" is not available, perform the "OVERALL FUNCTION CHECK" instead. The DTC cannot be displayed by this check, however, this simplified "check" is an effective alternative. The "NG" result of the "OVERALL FUNCTION CHECK" is the same as the DTC detection.

STEP V

Take the appropriate action based on the results of STEP I through IV. If the malfunction code is indicated, proceed to TROUBLE DIAGNOSIS FOR DTC XX. If the normal code is indicated, proceed to the BASIC INSPECTION. Refer to EC-65. Then perform inspections according to the Symptom Matrix Chart. Refer to EC-72. Identify where to begin diagnosis based on the relationship study between symptom and possible causes. Inspect the system for mechanical binding, loose connectors or wiring damage using (tracing) "Harness

STEP VI

STEP VII

Layouts". Gently shake the related connectors, components or wiring harness with CONSULT set in "DATA MONITOR (AUTO TRIG)" mode. Check the voltage of the related ECM terminals or monitor the output data from the related sensors with CONSULT. Refer to EC-74. The "DIAGNOSTIC PROCEDURE" in EC section contains a description based on open circuit inspection. A short circuit inspection is also required for the circuit check in the DIAGNOSTIC PROCEDURE. For details, refer to GI section ("HOW TO PERFORM EFFICIENT DIAGNOSIS FOR AN ELECTRICAL INCIDENT", "Circuit Inspection' '). Repair or replace the malfunction parts. Once you have repaired the circuit or replaced a component, you need to run the engine in the same conditions and circumstances which resulted in the customer's initial complaint. Perform the "DTC CONFIRMATION PROCEDURE" and confirm the normal code (Diagnostic trouble code No. 55) is detected. If the incident is still detected in the final check, perform STEP VI by using a different method from the previous one. Before returning the vehicle to the customer, be sure to erase the unnecessary (already fixed) DTC in ECM. Refer to EC-46.

EC-60

TROUBLE DIAGNOSIS -

General Description

Diagnostic Worksheet KEY POINTS WHAT ..... WHEN WHERE HOW

Vehicle & engine model Date, Frequencies Road conditions Operating conditions, Weather conditions, Symptoms

There are many operating conditions that lead to the malfunction of engine components. A good grasp of such conditions can make troubleshooting faster and more accurate. In general, each customer feels differently about a problem. It is important to fully understand the symptoms or conditions for a customer complaint. Utilize a diagnostic worksheet like the one shown below in order to organize all the information for troubleshooting.

SEF907L

WORKSHEET Customer name Engine

•

SAMPLE MR/MS

#

Incident Date

Model & Year

Mileage

Manu!. Date

In Service Date

o

Startability

Idling

Symptoms

o

Driveability

[.J Engine stall

Incident occurrence Frequency Weather conditions Weather Temperature

Engine conditions

VIN

Trans.

o o

.

o o o o

o No combustion Impossible to start o Partial combustion o Partial combustion affected by throttle position LJ Partial combustion NOT affected by throttle position Possible but hard to start o Others [ o

No fast idle Others [

o o o o o o o o o o

Driving conditions

Lack of power

1

o While idling o While decelerating o While loading Just after delivery o Recently In the morning o At night o In the daytime o Under certain conditions All the time o Sometimes Not affected

o

Fine

DRaining

Hot

o Warm o During

Cold

I

o

In town

o

o

Snowing

warm-up I

I

I

o

OF

I

I

4,000

2,000

In suburbs

1

Others [

o Cold o Humid o After warm-up

Cool

I

I

6,000

o

Highway

Off road (up/down)

Not affected At starting o While idling o At racing While accelerating o While cruising o While turning (RH/LH) While decelerating

,

I

0

o

o

At the lime of start While accelerating Just after stopping

Vehicle speed

Malfunction indicator lamp

1

Low idle

1

Engine speed

o o o o o

o

High idle

Stumble o Surge o Knock i.J Intake backfire o Exhaust backfire o Others [

0 Road conditions

o

Unstable

Turned on

I

10

o

I

I

20

Not turned on

EC-61

I

I

30

I

I

40

I

I

50

I

I

60 MPH

I 8,000 rpm

TROUBLE DIAGNOSIS -

General Description

Diagnostic Trouble Code (DTC) Chart ENGINE RELATED ITEMS Detected items Diagnostic trouble code No.

Malfunction is detected when ...

(Screen terms for CONSULT, "SELF-DIAG RESULTS" mode)

11

Camshaft position sensor circuit (CAMSHAFT POSI SEN)

• Either l' or 180' signal is not detected by the ECM for the first few seconds during engine cranking . • Either l' or 180' signal is not detected by the ECM often enough while the engine speed is higher than the specified rpm . • The relation between l' and 180' signals is not in the normal range during the specified rpm .

12

Mass air flow sensor circuit (MASS AIR FLOW SEN)

• An excessively high or low voltage is entered to ECM. • Voltage sent to ECM is not practical when compared with the camshaft position sensor signal and throttle position sensor signal.

13

Engine coolant temperature sensor circuit (COOLANT TEMP SEN)

• An excessively high or low voltage from the sensor is detected by the ECM.

21

Ignition signal circuit (IGN SIGNAL-PRIMARY)

• The ignition signal in the primary circuit is not detected by the ECM during engine cranking or running .

28*1

OVER HEAT

• The engine coolant temperature sensor output voltage is below 0.35V.

34"2

Knock sensor circuit (KNOCK SENSOR)

• An excessively low or high voltage from the sensor is detected by the ECM.

41*3

Intake air temperature sensor circuit (INT AIR TEMP SEN)

• An excessively high or low voltage from the sensor is detected by the ECM. • Voltage sent to ECM is not practical when compared with the engine coolant temperature sensor signal.

55

No failure

• No malfunction is detected by the ECM.

(NO SELF DIAGNOSTIC FAILURE INDICATED...) "1: Except for Australia *2: Except for Europe and Israel "3: For Australia *4: This is Quick Reference of "DTC CONFIRMATION PROCEDURE". Details are described in each TROUBLE DIAGNOSIS FOR DTC XX Abbreviations are as follows: IGN: ON : Turning the ignition switch ON is required for the ECM to detect a malfunction (if one exists). RUNNING: Running engine is required for the ECM to detect a malfunction (if one exists). *5: • The "OVERALL FUNCTION CHECK" is a simplified and effective way to inspect a component or circuit. In some cases, the "OVERALL FUNCTION CHECK" is used rather than a "DIAGNOSTIC TROUBLE CODE CONFIRMATION PROCEDURE". When no DTC CONFIRMATION PROCEDURE is available, the "NG" result of the OVERALL FUNCTION CHECK can be considered to mean the same as a DTC detection . • During an "NG" OVERALL FUNCTION CHECK, the DTC might not be confirmed.

EC-62

TROUBLE DIAGNOSIS - General Description mJ Diagnostic Trouble Code (DTC) Chart (Cont'd) X: Applicable -: *4

"DTC

*5

Check Items

CONFIRMATION

"OVERALL FUNC-

Fail

(Possible Cause)

PROCEDURE"

TION CHECK"

Safe

Quick Ref.

Quick Ref.

System

• Harness or connectors (The sensor circuit is open or shorted.) • Camshaft position sensor

RUNNING

• Starter motor • Starting system circuit (EL section)

Not applicable

-

Reference Page

-

EC-94

X

EC-101

• Dead (Weak) battery • Harness or connectors (The sensor circuit is open or shorted.) • Mass air flow sensor • Harness or connectors (The sensor circuit is open or shorted.) • Engine coolant temperature sensor • Harness or connectors (The ignition primary circuit is open or shorted.) • Power transistor unit • Camshaft position sensor • Camshaft position sensor circuit • Harness or connector • Engine coolant temperature sensor • Harness or connectors (The sensor circuit is open or shorted.) • Knock sensor • Harness or connectors (The sensor circuit is open or shorted.) • Intake air temperature sensor

. RUNNING

RUNNING

IGN: ON

-

X

EC-108

RUNNING

-

-

EC-113

-

EC-108

-

IGN: ON (after warming up)

RUNNING

-

-

EC-119

IGN: ON

-

-

EC-124

-

-

• No failure -

EC-63

-

•

TROUBLE DIAGNOSIS -

General Description

Fail-Safe Chart The ECM enters fail-safe Detected

DTC No. 12

Mass

mode, if any of the following

items

air flow

sensor

Engine Engine

speed

will

DTCs is recorded due to the open or short circuit. operating

not rise more

than

condition

in fail-safe

3,000 rpm*1

mode

due to the fuel cut.

circuit 13

Engine perature

coolant sensor

cuit

temcir-

Engine

coolant

temperature

switch

"ON"

Except

for Europe

will

be determined

based

on the time


Just as ignition switch is turned ON or Start

BO'G (176'F)

and Israel Condition


More than 4.5 minutes after ignition ON or Start

BO'G (176'F) 35 - BO'C (95 - 176'F) (Depends on the time)

Except as shown above the fail-safe

fan operates

sensor

position circuit

Throttle

system

for engine

engine

is running.

while

position

will

be determined

coolant

based

temperature

sensor

on the injected

fuel amount

acceleration

will

the cooling

and the engine

be poor.

Driving condition

Condition

Normal

When engine is idling

Poor acceleration

When accelerating

ECM

is activated,

speed. Therefore,

-

decided

35'C (95'F)


Throttle

decided

30 - BO'C (B6 - 176'F) (Depends on the time)

Except as shown above

43

ignition

30'C (B6'F)

More than 5 minutes after ignition ON or Start

When

turning

and Israel Condition

For Europe

after

or "START".

Fail-safe system activating condition when ECM is malfunctioning The computing When

function

the fail-safe

the CPU of ECM), warn

of the ECM was judged

system

activates

(i.e.,

the MALFUNCTION

to be malfunctioning.

if the ECM detects

INDICATOR

LAMP

a malfunction

condition

on the instrument

panel

in lights

to

the driver.

Engine control, with fail-safe system, operates when ECM is malfunctioning When

the fail-safe

operation, tain

system

IACV-AAC

valve

is operating, operation

fuel injection, and cooling

ignition

fan operation

timing,

fuel pump

are controlled

under

cer-

limitations.

Operation Engine speed will not rise more than 3,000 rpm

Engine speed

Simultaneous

Fuel injection

system

Fuel pump' relay is "ON" when engine is running and "OFF" when engine stalls Full open

IACV-AAG valve Cooling fans

fuel injection

Ignition timing is fixed at the preset valve

Ignition timing Fuel pump

multipart

Cooling fan relay "ON" when engine is running, and "OFF" when engine stalls

EC-64

TROUBLE DIAGNOSIS -

General Description

Basic Inspection Precaution: Perform Basic Inspection without electrical or mechanical loads applied; • Headlamp switch is OFF, • Air conditioner switch is OFF, • Rear defogger switch is OFF, • Steering wheel is in the straight-ahead position, etc.

\\ ~

m

~ SEF1421

~use

box

~-~

vll-JIData link connector~'

BEFORE STARTING 1. Check service records for any recent repairs that may indicate a related problem, or the current need for scheduled maintenance. 2. 9pen engine hood and check the fol. lowing: • Harness connectors for improper connections • Vacuum hoses for splits, kinks, or improper connections • Wiring for improper connections, pinches, or cuts

•

CONNECT CONSULT TO THE VEHICLE. Connect "CONSULT" to the data link connector for CONSULT and select "ENGINE" from the menu. Refer to EC-36

DOES ENGINE START?

CHECK IGNITION TIMING. 1. Warm up engine sufficiently. 2. Stop engine and disconnect throttle position sensor harness connector. 3. Start engine. 4. Check ignition timing at idle using timing light. Ignition liming:

Refer to EC-36. OK

(Go to @ on next page.)

EC-65

No

NG

Go to

(J.

Adjust ignition timing by turning distributor.

TROUBLE DIAGNOSIS - General Description Basic Inspection (Coni' d) @

1

(;]

CHECK IDLE ADJ. SCREW INITIAL SET RPM. Base idle speed: Refer to EC-36.

t

NG

~

Adjust engine speed by turning idle adjusting screw.

K

II

CHECK THROTTLE POSITION SENSOR IDLE POSITION. 1. Perform ''THRTl POS SEN ADJ" in "WORK SUPPORT" mode. 2. Check that output voltage of throttle position sensor is approx. 0.35 to 0.65V (Throttle valve fully closes.) and "ClSD THlIP SW" stays "ON". OR Measure output voltage of throttle position sensor using voltmeter, and check that it is approx. 0.35 to 0.65V. (Throttle valve fully closed.)

00

NG

~

Adjust output voltage to 0.50 :l: 0.1V by rotating throttle position sensor body.

00

OK

• THRTl POSSEN ADJ.

***

ADJ MONITOR

THRTLPOSSEN

==========

RESET IDLE POSITION MEMORY. 1. Warm up engine sufficiently. 2. Turn ignition switch "OFF" and wait at least 5 seconds. 3. Disconnect throttle position sensor harness connector. 4. Start engine and wait at least 5 seconds in "N" position . 5. Reconnect throttle position sensor harness connector while running engine.

0

***

0.52V

==========

@

MONITOR CMPS.RPM (REF) Orpm CLSD THLIPOSI ON

(Go to next page)

SEF516Q

SEF12BR

EC-66

TROUBLE DIAGNOSIS - General Description Basic Inspection (Cont'd) CID CHECK IDLE SPEED Check idle speed. Refer to EC-36.

NG

Adjust idle speed. Refer EC-35.

OK

After this inspection, unnecessary diagnostic trouble code No. might be displayed. Erase the stored memory in ECM. OK

INSPECTION END

EC-67

•

TROUBLE DIAGNOSIS -

*

MONITOR

*

NO FAIL

ENG TEMP SEN

General Description

Fast Idle Cam (FIC) Inspection and Adjustment - For Europe and Israel

o

1. Start engine and warm it up. 2. See "ENG TEMP SEN" or "COOLAN TEMP/S" in ~ "DATA MONITOR" mode with CONSULT. 3. When engine coolant temperature is 80:l: 5°C (176:l:9°F), make sure that mark @ is aligned with mark ~ as shown in the figure.

80°C

(ij\

RECORD SEF214N

Cam follower lever

SEF147N

•

2. Disconnect engine coolant temperature sensor harness connector and check resistance as shown in the figure. 3. When the resistance of engine coolant temperature sensor is 0.26 to 0.39 kQ, make sure that mark @ is aligned with mark @ as shown in the figure. If NG, adjust by turning adjusting screw . Adjusting serew tightening torque: 0.98 - 1.96 N.m (10 - 20 kg-em, 8.7 - 17.4 in-Ib)

SEF536H

Fast idle earn

Cam follower lever

4. Stop engine. 5. Turn ignition switch "ON" and see "ENG TEMP ~ SEN" or "COOLAN TEMP/S" in "DATA MONITOR" mode with CONSULT. 6. When engine coolant temperature is 25:l: 5°C (77:l: 9°F), make sure that mark CID is aligned with mark @ as shown in the figure. ~ 5. When the resistance of engine coolant temperature ~ sensor is 1.65to 2.40 kQ, make sure that mark CID is aligned with mark @ as shown in the figure. • If NG, replace thermo-element and perform the above inspection and adjustment again.

rF.i\

Thermoelement

SEF148N

Fast Idle Cam (FIC) Inspection and Adjustment - Except for Europe and Israel 1. Remove throttle body from engine. 2. Wait for at least 3 hours. (This step is necessary to bring the temperature of the thermo-element to the room temperature

EC-68

TROUBLE DIAGNOSIS - General Description ~ Fast Idle Cam (FIC) Inspection and Adjustment - Except for Europe and Israel (Cont'd) 3. 4.

Thermo-element

Measure thermo-element stroke (L) and room temperature. Check thermo-element stroke (L) as shown in the figure. L: Thermo-element

stroke

Go to step 17 (0.669) 16 C (0630)

1645 1(0.6476)

"" 15 ~ (0591)

15.35 : (06043)

::J 14 -; (0.551)

'14.24 : (05610)

t5 fJi

I

13 (0.512)

2**

5*

*: Thermo-element

is normal. Adjust first idle cam only.

**: Thermo-element

is malfunctioning. inspection beginning with step 2.

Replace thermo-element,

and perform

•

I

12 11.05 (0472) (0435) 11 (0433) 10 (0.394) 9.95 (0.392)

: 1290 : I (0.508) I I I I

I I I

:

I

I

r

I

r

r

I

I I -20 0 20 25 40 HI (32) (68) (77) (104) Thermo-element temperature °C (OF)

SEF0810

Adjust clearance @ between adjusting screw to specification (8).

5.

GA15DE Adjusting screw (s) Lock nut

Engine models

Fast idle carn

GA15DE

throttle stopper and throttle by turning adjusting screw

Clearance

@ mm (in)

M/T

0.40 - 0.75 (0.0157 - 0.0295)

A/T

0.61 - 0.95 (0.0240 - 0.0374)

M/T

0.72 - 1.18 (0.0283 - 0.0465)

A/T

0.95 - 1.43 (0.0374 - 0.0563)

GA16DE SEF0820

GA16DE

6.

Z *. Clearance

@

SEF0830

Rotate adjusting screw (8) clockwise or counterclockwise by Z turns according to the following equation, then tighten the adjusting screw lock nut. L (mm) -

= -------~

Value of element Y = 0.5 0.8 • Direction (1) Positive (2) Negative

L8* (mm)

Y (mm)

L (in) -

/ Z = --------

Y (in)

the specified line (Ls) at the temperature actually measured. (GA 15DE) (GA 16DE) of adjusting screw (8) rotation (+) Z: Counterclockwise ( - ) Z: Clockwise

EC-69

L8* (IN) of thermo-

TROUBLE DIAGNOSIS - General Description []A] Fast Idle Cam (FIC) Inspection and Adjustment - Except for Europe and Israel (Cont'd) For example:

Thermo-element .C l"F) temperature

Case I

Case II

25 (77)

40 (104)

14.0 (0.551)

15.35 (0.6043)

14.5 (0.571)

14.60 (0.5748)

Thermo-element specified stroke (Ls) mm (in) Thermo-element stroke (L) mm (in) Revolutions of adjusting screw (Z) mm/in Direction of revolution

EC-70

14.5. 14.0 =0.63 I 0.80 0.571 - 0.551 = 0.63 0.0315

Z =

Counterclockwise

14.60 - 15.35 = -0.94 I 0.80 0.5748.0.6043 = -0.94 0.0315

Z =

Clockwise

TROUBLE DIAGNOSES -

General Description

Symptom Matrix Chart SYMPTOM

~

Cl.

en

~ ~

~

0::

<{

0 Z

2i

0:: I

Fuel pump circuit Fuel pressure regulator system Injector circuit Evaporative emission system

Air

Positive crankcase ventilation system Incorrect idle speed adjustment IACV-AAC valve circuit IACV-FICD solenoid valve circuit

Ignition

Incorrect ignition timing adjustment Ignition circuit

EGR

(EGR valve &) EVAP canister purge control soienoid valve circuit EGR system

Main power supply and ground circuit Cooling

I Cooling

tan circuit

Air conditioner circuit

u..

<{

~

en w

~

Fuel

-I

<{

-I -I <{

~ en W

z <3 Z

:c

w

AA

AB

0

0

0

()

z

i=

<{

0

;;:

w

~ ~

ii

:s:

0

:s: 0

-I

Q

0:: <{

<.)

<{

~

en

-I

AC

AD

()

Q

0

Cl.

[)

-I

W

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(continued on next page)

EC-71

TROUBLE DIAGNOSES - General Description Symptom Matrix Chart (Cont'd) SYMPTOM :I: C)

Z

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• • • • • • •

• •

Incorrect throttle position sensor adjustment

• • • • • •

0 0 0

• • • •

Vehicle speed sensor circuit

0

C)

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Camshaft position sensor circuit Mass air flow sensor circuit (Heated) oxygen sensor circuit Engine coolant temperature sensor circuit Throttle position sensor circuit

w

Knock sensor circuit ECM Start signal circuit

0 0

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()

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>

• • • • • • • • 0 0 •

()

0 0

0 ()

0

()

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0

0

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EC-94 EC-101 EC-189,194 EC-108 EC-128

()

EC-65

0 0 0

EC-133 EC-119 EC-64 EC-138

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Park/Neutral position switch circuit Power steering oil pressure switch circuit

• •

--l

Reference page

UJ Cl

«

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--l --l

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0 i=

a:

i==:

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0

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EC-173 EC-169 (continued on next page)

EC-72

TROUBLE DIAGNOSES - General Description Symptom Matrix Chart (Cont'd) SYMPTOM J: CJ

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~

i= « a:

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cL

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z

0:

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i=

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0

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ILU

0:

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0

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I-

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SYSTEM - Engine mechanical & other

z

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a:

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0

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AS

AC

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• • • • •

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tJ

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0 0 (J

0

0 0

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0

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-

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0

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0

(J

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U

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c:

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Exhaust valve

pump/Oil filter/

Oil level (Low)/Filthy oil filler cap

U

0

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C)

u

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U

0

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cool-

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EC-73

('

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Coolant level (low)/Contaminated ant

EL section

CL section

• • • • • • • 0 • 0 • • • • •

Cylinder head

Radiator/Hose/Radiator

LU

0

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20 «

C/J C/J LU

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C/J LU

CJ Z

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0 0

i=

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Cylinder head gasket

Lubrication

0:

CJ

LU

-'

UJ a:

z

0

i=

Poor fuel (Heavy weight gasoline, Low octane)

Cylinder block

Exhaust

«

0

Valve deposit

Flywheel

Valve mechanism

0

0

0 0

Z

U

Starter circuit

Engine

Z

~

«

I-

LU

Z

Vapor lock

Air

«

C/J

0

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«

Fuel tank

-' -'

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z

0

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a:

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a:

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0

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0

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)

-

TROUBLE DIAGNOSES -

General Description

CONSULT Reference Value in Data Monitor Mode Remarks: • Specification data are reference values . • Specification data are output/input values which are detected or supplied by the ECM at the connector. * Specification data may not be directly related to their components signals/values/operations. (Le., Adjust ignition timing with a timing light before monitoring IGN TIMING. Specification data might be displayed even when ignition timing is not adjusted to specification. This IGN TIMING monitors the data calculated by the ECM according to the input signals from the camshaft position sensor and other ignition timing related sensors.) • If the real-time diagnosis results are NG, and the on-board diagnostic system results are OK, when diagnosing the mass air flow sensor, first check to see if the fuel pump control circuit is normal. MONITOR ITEM

SPECIFICATION

CONDITION

CMPS.RPM (REF)

• Tachometer: Connect • Run engine and compare tachometer indication with the CONSULT value .

MAS AIRIFL SE

• • • •

COOLAN TEMPIS

Engine: After warming up Air conditioner switch: OFF Shift lever: "N" No-load

Idle

1.0 - 1.7V

2,000 rpm

1.5 - 2.1V More than 70°C (158°F)

• Engine: After warming up

0- 0.3V

02 SEN Maintaining rpm

• Engine: After wflrming up MIR FIC MNT

VHCL SPEED SE

• Turn drive wheels and compare speedometer value

SA TTERY VOLT

• Ignition switch: ON (Engine stopped)

THRTL POS SEN


START SIGNAL

• Ignition switch: ON

CLSD THLIPOS


AIR COND SIG

PIN POSI SW

Almost the same speed as the CONSULT value .

-->

START

-->

0.6 - 1.0V

LEAN <-+ RICH Changes more than 5 times during 10 seconds .

indication with the CONSULT

Almost the same speed as the CONSULT value 11 - 14V

Throttle valve fully closed

0.35 - 0.65V

Throttle valve fully opened

Approx. 4.0V OFF

ON

• Engine: After warming up, idle the engine

<-+

engine speed at 2,000

Throttle valve: Idle position

ON

Throttle valve: Slightly open

OFF

AIC switch "OFF"

OFF

AIC switch "ON" (Compressor operate&)

ON

Shift lever "P" or "N"

ON

Except above

OFF


EC-74

-->

ON

-->

OFF

TROUBLE DIAGNOSES - General Description @KJ CONSULT Reference Value in Data Monitor Mode (Cont'd) CONDITION

MONITOR ITEM

PW/ST SIGNAL

• Engine: After warming up. idle the engine

IGNITION SW


LOAD SIGNAL

INJ PULSE

-->

SPECIFICATION

Steering wheel in neutral position (forward direction)

OFF

The steering wheel is turned

ON

OFF

ON

-->

Rear window defogger is operating and/or lighting switch is on

ON

Rear window defogger is not operating and lighting switch is not on

OFF

Idle

2.4 - 3.2 msec.

2.000 rpm

1.9 - 3.2 msec.

Idle

6 _10' BTDC


• • • •


.

ditto

IGN TIMING

2.000 rpm

More than 25' BTDC

Idle

20 - 40%

2.000 rpm

-

Maintaining engine speed at 2.000 rpm

75 - 125%

ditto

IACV-AACIV

A/F ALPHA


AIR COND RLY

• Air conditioner switch:

ON

FUEL PUMP RLY

• Ignition switch is turned to ON (Operates for 5 seconds) • Engine running and cranking • When engine is stopped (stops in 1.0 seconds) • Except as shown above

OFF

• When cooling fan is stopped

OFF

• When cooling fan operates at low speed

LOW

• When cooling fan o!Jerates at high speed

HI

COOLING FAN

VALVE TIM SOL'1

EGRC SOLIV (EVAP canister purge control solenoid valve or EGR valve & EVAP canister purge control solenoid valve)

OFF

OFF


• • • •

Engine: After warming up Air conditioner switch: OFF Shift lever: N No-load

-->

OFF

ON

Idle

OFF

Racing engine quickly from idle to 4.000 rpm

ON

Idle

ON

Racing engine from idle to 3.000 rpm in 1st position

OFF

*1: GA16DE except for Europe and Israel

EC-75

-->

ON

•

TROUBLE DIAGNOSES -

I_G_A_'

General Descrip_ti_o_n

Major Sensor Reference Graph in Data Monitor Mode The following are the major sensor reference graphs in "DATA MONITOR" mode. (Select "HI SPEED" in "DATA MONITOR" with CONSULT.)

THRTL POS SEN, CLSD THLIPOSI Below is the data for "THRTL pas SEN" and "CLSD THLIPOSI" when depressing the accelerator pedal with the ignition switch "ON". The signal of "THRTL pas SEN" should rise gradually without any intermittent drop or rise after "CLSD THLIPOSI" is changed from "ON" to "OFF". CLSD THUPOSI 10:22 OFF Full

Release

THRTL POS SEN 10:22 XO.1V o 13 26

-00"09 +02"69 ON

~

I

{ ~

\ '

-00'09 +02'69 38

51,

..

Full Depress { SEF673Q

CMPS,RPM (REF), MAS AIR/FL SE, THRTL POS SEN, 02 SENSOR, INJ PULSE Below is the data for "CMPS.RPM (REF)", "MAS AIR/FL SE", "THRTL pas SEN", "02 SENSOR" and "'NJ PULSE" when revving quickly up to 4,800 rpm under no load after warming up engine sufficiently. Each value is for reference, the exact value may vary.

:

./

E

0-

..

.•.•.....•.,

C5 C\J LL~C? wX a: ~ co_ a.. a:

ci>

...........

o "CMPSoRPM(REF)" should increase gradually while depressing the accelerator pedal and should decrease gradually after releasing the pedal without any intermittent drop or rise.

.........

.................................... _ ....... __ ._....

...

1l)

.,_,.

a..C\J

;:a"

L.-r... ------------------

(.)~o

CO" ... OCOIt)

gg , +

CDC')

.../ ....

> ... co

.':

~C\J

W

C/) -J

~

,.. .... -

~-

... _ ••,. •••• \ •••• ,.. _ ......

~

.. _

... _-

...... "¥'.,. ... """""'... _ .... _ .. _ ...

_ .. -

.... '

.... _.

o "MAS AIRIFL SE" should increase when depressing the accelerator pedal and should decrease at the moment "THRTL POS SENu is closed (accelerator pedal is released).

< .. ..,0)0 "",,0

L.r-------------------... SEF059P

EC-76

mJ TROUBLE DIAGNOSES - General Description Major Sensor Reference Graph in Data Monitor Mode (Cont'd) cD 0

0

9

.... cD

~ 0

-

ll)

+

,.

.....

co

M

> z ~

• "THRTL

re

pas SEN"

depressing

w

should increase while

the accelerator

pedel and should

decrease while releasing it.

en en

•

M

0

0..

-'

b: :r:

-'

ll)

C\l

t-

o

a;

0

cD 0

.... cD

ll)

b ~ 9 0+

A

cD

C\l

C\l C1l

> <3 ci ><

IX)

C\l

--

v cD

z

w en C\l

0 cD 0

ll)

C\l

a; 0

.... cD

b ~ 9 0+

--._------

.~. 0

A

• ''02 SEN" may increase immediately depressing

the accelerator

after

pedel and may

decrease after releasing the pedal.

.......

0 C\l

ll)

u w en

:!

w en

-' ::>

a. ..,

z

:~.

0

• "INJ PULSE" should increase when depressing

ll)

j

'.

ll)

\

C\l

a; 0

0

I

."""\

~---

the accelerator

pedal and should decrease

when the pedal is released.

A

SEF259QA

EC-77

TROUBLE DIAGNOSES -

General Description

ECM Terminals and Reference Value PREPARATION 1.

ECM is located behind the center console panel. For this inspection, remove the center console under cover.

2.

Remove ECM harness protector.

3.

Perform all voltage measurements with the connectors connected. Extend tester probe as shown to perform tests easily.

MEF140D

~~

Tester probe

MEC4868

ECM HARNESS CONNECTOR

TERMINAL

LAYOUT

For Australia ~

101 102 03

104 105 106

107 lOB 09

110 111 112

113 114 115

116 117 lIB

1~~~~.41i i5~ @]8 ~9 . ~1 3

1

4950

51

70

SEF130R


SEF131R

EC-78

TROUBLE DIAGNOSES - General Description @K] ECM Terminals and Reference Value (Conl'd) ECM INSPECTION Specification TERMINAL NO.

TABLE -

GA16DE for Australia

data are reference

values and are measured

WIRE COLOR

ITEM

between each terminal

and @ (ECCS ground).

CONDITION [Efl9ine is running.

DATA

I 0.3 - 0.6V

1

WIB

Ignition signal

L

Idle speed

IEngine is running. I L

IEngine is running. 2

GYIR

Ignition check Idle speed

[Engine is running. LIB

I Approximately 12V

L 3

Approximately 0.9V

Engine speed is 2,000 rpm.

I

Tachometer

Approximately 0.9V L

Idle speed

IEngine is running.

I

Ilgnition switch "OFF'.' 4

WIG

ECCS relay (Self-shutoff)

L

For a few seconds after turning ignition switch "OFF"

Ilgnition switch "OFF" L

8

BIP

Fuel pump relay

Engine ground Idle speed

IEngine is running.

LG

Cooling fan relay (High speed: For AIT models)

~

Cooling fan is not operating. Cooling fan is operating at low speed.

Cooling fan relay (Low speed)

L

Cooling fan is not operating.

L Y


Approximately OV BATTERY VOLTAGE (11-14V) 0.07 - 0.30V

Cooling fan is operating.

I Engine 15

I

IEngine is running. I L_

BATTERY VOLTAGE (11-14V) .

Cooling fan is operating at high speed.

IEngine is running. LGIR

I

I Engine is running. I L

14

BATTERY VOLTAGE (11-14V)

I

ECCS ground L

13

I

More than 5 seconds after turning ignition switch "ON"

IEngine is running. BIW

0.07 - 0.20V

I

Ilgnition switch "ON"

10

BATTERY VOLTAGE (11 - 14V)

I

For 5 seconds after turning ignition switch "ON"

IEngine is running.

L

I

A few seconds passed after turning ignition switch "OFF"

Ilgnition switch "ON" L

0- 1V

is running.

I

Both AIC switch and blower switch are "ON".

IEngine is running. LAIC

I

switch is "OFF".

EC-79

0.08 - 0.2V


•

TROUBLE DIAGNOSES - General Description ~ ECM Terminals and Reference Value (Cont'd) TERMINAl NO.

WIRE COLOR

18

OR/l


19

BIW

ECCS ground

/'gnition switch "ON'"

Approximately 50mV

IEngine is running. I L Idle speed

BATTERY VOLTAGE (11.14V)

IEngine is running. I

L

BIY

Engine ground

Idle speed

I'gnition switch "ON" 20

I

Start signal I'gnition switch "5T ART"

Approximately OV

I

IEngine is running. I L Both air conditioner 21

G

DATA

CONDITION

ITEM

switch and blower switch are "ON" (Compressor operates)


IEngine is running.

L

t

I

Air conditioner switch is "OFF"


Approximately OV


I'gnition switch "ON'"

22

G/OR

Neutral position switch (M/T models) Inhibitor switch (A/T models)

Ge., po,"'on " "Ne"".1 po,ltlon" (MIT models) Gear position is "N" or "P" (A/T models)

Except the above gear position

Ilgnition switch "ON" 23

Y


AIT models: BATTERY VOLTAGE (11 - 14V)

llgnition switch "ON'"

L L

M/T models: Approximately 5V

I 0.35 - 0.65V

Accelerator pedal released

!'gnition switch "ON"

L

Approximately OV

I

Approximately 4V

Accelerator pedal fully depressed

/Engine is running.1 25

Pu/W


L

IEngine is running.1

L

26

PUIR


Approximately OV Steering wheel is being turned Approximately 5V Steering wheel is not being turned

IEngine is running. I L Front of vehicle

raised and front wheels are

Approximately 1.8 - 2.4V (AC voltage)

rotating

30

PIB

Torque converter clutch solenoid valve (A/T models only)

IEngine is running. I L Idle speed IEngine is running. I (Warm-up condition) L

Vehicle speed is 64 km/h (40 MPH) or more in "D" position

Approximately OV


I,gnition switch "ON" , 35

lG/B

Blower fan switch

L

Approximately OV Blower fan switch is "ON"

EC-80

TROUBLE DIAGNOSES - General Description ~ ECM Terminals and Reference Value (Cont'd) TERMINAL NO.

38

WIRE COLOR

BIR

ITEM

CONDITION

DATA

Ilgnition switch "OFF"1

OV

llgnition switch "ON"!


Ignition switch

IEngine is running. I 39

B

ECCS ground

40

l

Camshaft position sen-

44

l

sor (Reference signal)

L



L

(AC voltage)

Idle speed

i'gnition switch "ON'" 42

PUlW

IACV-AAC valve (Close)

I

IEngine is running. (Warm-up condition)

L



B

ECCS ground

41 45

B/W B/W

Camshaft position sensor (Position signal)

46

W

Oxygen sensor

L

BATTERY VOLTAGE (11 - 14V) Engine ground (Probe this terminal with

e

Idle speed

IEngine is running. I L

Approximately OV

tester probe when measuring.)

Idle speed


L

Approximately 2.7V

After warming up sufficiently and engine speed is 2,000 rpm.

Approximately 2.7V (AC voltage)

o - Approximately

1.0V (periodically change)

IEngine is running. I (Warm-up condition) 47

OR


L

I Engine

L 48

W

Mass air flow sensor ground

49

P/l

Throttle position sensor power supply

50

B

Sensors' ground

1.0 - 1.7V Idle speed 1.5 - 2.1V Engine speed is 2,000 rpm.

I Engine

L

is running.! (Warm-up condition)

is running. I (Warm-up condition) 0.005 - 0.02V

Idle speed

j!gnition switch "ON"I

IEngine is running. I (Warm-up condition)

51

BRIY


L

Approximately 5V

0.001 - 0.02V

Idle speed

1Engine is running.

I

0- 4.84V Output voltage varies with engine coolant temperature.

I Engine 54

W

Knock sensor

L

is running.! 2.0 - 3.0V

Idle speed

Ilgnition switch "ON'" 55

LlR

Rear defogger relay

L

Ilgnition switch "ON"I

L 56 61

W/R W/R

Power supply for ECM

Approximately OV Rear defogger is "OFF".

Rear defogger is "ON".


EC-81

BATTERY VOLTAGE (11 - 14V) BATTERY VOLTAGE (11 - 14V)

•

TROUBLE DIAGNOSES - General Description ~ ECM Terminals and Reference Value (Conl'd) TERMINAL NO.

60

WIRE COLOR

RIG

63

RIY

64

GIR

65

GY/L

68

GIW

70

W/L

ITEM

CONDITION

ILighting switch "ON"I


ILighting switch "OFF"I

Approximately OV


0- 5.0V Output voltage varies with intake air temperature.


Approximately OV

Headlamp switch

Intake air temperature sensor

Data link connector for CONSULT

Power supply (Back-up)

L

Idle speed (CONSULT is connected and turned on)

I,gnition switch "OFF"

I

SS

IACV-AAC valve (Open)

RIB

Injector No.1

104

GIS

Injector No.3

107

YIB

Injector No.2

109

LIB

Injector No.4

BATTERY VOLTAGE (11 - 14V) 0- 4V


103

106

P

BIY

ECCS ground

~

L

BIY

ECCS ground

models: Jack up front wheels and drive wheels at 16 kmlh (10 mph) Engine speed is 2,000 rpm.

IEngine is running.

L

Idle speed

L

Idle speed

YIR

VTC solenoid valve

L L

is running.

OR

L

I

I

SlY

ECCS ground

Engine ground

.

is running.


I

Approximately OV


I

Engine speed is above 3,200 rpm.

IEngine is running.

I

L

Engine speed is below 3,200 rpm.

L

Idle speed


Approximately OV

Engine ground

Idle speed



Idle speed

IEngine L

Heated oxygen sensor heater ground (A/T models)

I (Warm-up condition)



I (Warm-up condition)

MIT

IEngine 112


Engine is running

IEngine is running. EGR valve & EVAP can.ister purge control solenoid valve

Approximately 3.5V

IEngine is running. I (Warm-up condition) L

102

Approximately 4 - 9V


Ilgnition switch "ON"I 101

DATA

EC-82

BATTERY VOLTAGE (11 - 14V) Approximately OV

Engine ground

TROUBLE DIAGNOSES - General Description @K] ECM Terminals and Reference Value (Conl'd) ECM INSPECTION

TABLE -

Except GA 16DE for Australia

Specification data are reference values and are measured between each terminal and @ (ECCS ground). TERMINAL NO.

WIRE COLOR

ITEM

CONDITION

DATA

IEngine is running.1 1

WIB

Ignition signal

L

0.2 - 0.3V Idle speed

IEngine is ru~

L Tachometer 2

LIB

(Models with tachometer)

Approximately 0.7V Engine speed is 2,000 rpm.


L


jEngine is running.1 3

GYIR

Ignition check

Approximately 13V

L

Idle speed

Engine is running.'

I

Ignition switch "OFF"I 4

WIG


L

0- 1V


llgnition switch "OFF"I

L

A few seconds after turning ignition


switch "OFF" and thereafter IEngine is running.1 9

LGIR


L




L

Approximately OV Cooling fan is operating.


10

LG

Cooling fan relay (High speed)

t

BATTERY VOLTAGE Cooling fan is not operating. Cooling fan is operating at low speed.

(11 - 14V)


L

Approximately OV Cooling fan is operating at high speed.


L 11

Yor G

Both AIC switch and blower fan switch are "ON".


IEngine is running.1 LAIC

switch is "OFF".


12

YIR

VTC solenoid valve (GA16DE engine models except for Europe and Israel)

Approximately OV

L

Idle speed



L

Engine is racing quickly from idle to 4,000 rpm at 1st position.

EC-83

Approximately OV

•

TROUBLE DIAGNOSES - General Description rnJ ECM Terminals and Reference Value (Cont'd) TERMINAL NO.

WIRE COLOR

ITEM

CONDITION

DATA

IEngine is running./ (Warm-up condition) 16

OR or G Mass air flow sensor

L


IEngine is running.1 (Warm-up condition)

L 18

BR/Yor

Engine coolant temper-

GY

ature sensor

1.7-2.3V Engine speed is 2,000 rpm. 0- 5.0V Output voltage varies with engine coolant

IEngine is running.'

temperature. 19

W

Oxygen sensor (Except for Europe and Israel)


L

o - Approximately

1.0V

After warming up sufficiently

Ilgnition switch "ON"I (Warm-up condition) 20

Y


L

0.40 - 0.60V Accelerator

pedal released

jlgnition switch "ON"I

L

Approximately Accelerator

4V

pedal fully depressed For Israel

22 30

L

Camshaft position sensor (Reference signal: Except for Europe)

1.5 - 3.0V IEngine is running.1 Except for Israel 0.1 - 0.4V Ilgnition switch "ON'"

24

ORIL

Malfunction lamp

Approximately

1.5V

indicator BATIERY VOLTAGE


(11 - 14V) 27

W

L

Knock sensor (Except for Europe and Israel)


L

Approximately

2.5V

Idle speed

Camshaft position sensor (Reference signal:

1.5 - 3.0V

For Europe) 31 40 B/W

Camshaft position sensor (Position signal: Except for Europe and Israel)

IEngine is running.1 2.0 - 3.0V

t


PUIR


'S "Neu-

Eog'oe stopped aod gea, posit;oo tral position". While rotating drive wheel by hand

Varies from 0 to 5V


t

33

R

BA TIERY VOLTAGE Rear window defogger switch is "ON". Lighting switch is "ON".

(11 - 14V)

Electric load switch IEngine is running.1

t

Rear window defogger switch is "OFF". Lighting switch is "ON".

EC-84

OV

TROUBLE DIAGNOSES - General Description @K] ECM Terminals and Reference Value (Conl'd) TERMINAL NO.

WIRE COLOR

CONDITION

ITEM


BIY

DATA

Approximately OV

Start signal BATTERY VOLTAGE (11 - 14V)

pgnition switch "ST ART"I

pgnition switch "ON"I

t

35

G/OR

Neutral position switchl Inhibitor switch

"N" or "P" position (A/T) Neutral position (M/T)

OV

For Europe and Israel Approximately 5V llgnition switch "ON"1

.L Except the above gear position

Except for Europe and Israel BATTERY VOLTAGE (11 - 14V)

Ilgnition switch "OFF"! 36

B/R

Ignition switch (Except for Europe)

OV BATTERY VOLTAGE (11 • 14V)

!Ignition switch "ON"I

37

P/L



38 47

W/R



Approximately 5V BATTERY VOLTAGE (11 - 14V)


L 41

Both air conditioner switch and blower

Approximately OV

fan switch are "ON".

G or GY Air conditioner switch

!Engine is running.1

L Air conditioner

switch is "OFF".


IEngine is running.! 43

PU/W

OV

L

Steering wheel is being turned. Power steering oil pressure switch IEngine is running.1

L Steering 44

B/R

Ignition switch (For Europe)

Approximately 5V wheel is not being turned.

jlgnition switch "OFF"I

OV




44

R/L

Thermo control amp. (Except for Europe and Israel)

L Both air conditioner

switch and blower fan Approximately OV

switch are "ON". IEngine is running.1

L Air conditioner

switch is "OFF".



LG/B or G/Y

Blower fan switch

L

Approximately OV Blower fan switch is "ON".

IEngine is running.!

L

Approximately 5V Blower fan switch is "OFF".

EC-85

•

TROUBLE DIAGNOSES - General Description mJ ECM Terminals and Reference Value (Cont'd) TERMINAL NO.

WIRE COLOR

ITEM

46

WIL


101

RIB

Injector No. 1

103

GIB

Injector No.3

110

Y/B

Injector NO.2

112

LIB

Injector NO.4

CONDITION

Ilgnition switch "OFF'"


IEngine is running./


IEngine is running.1 Heated oxygen sensor 102

OR

heater ground (For Europe and Israel)

DATA

L

BATTERY VOLTAGE

Engine speed is above 3,200 rpm.

(11 - 14V)


L

Approximately OV Engine speed is below 3,200 rpm.


L 104

B/P

Fuel pump relay (Except for Europe)


Approximately OV

/Engine is running.1


L EVAP canister purge control solenoid valve (GA16DE MIT models

105

P

5 seconds after turning ignition switch "ON" and thereafter



L

Approximately OV Idle speed

except for Europe & Israel) EGR valve & EVAP canIEngine is running.1 (Warm-up condition) ister purge control solenoid valve (For Europe Engine is racing from idle to 3,000 rpm in and Israel, and GA15DE 1st position. MIT models)

L



L 106

SIP

Fuel pump relay



(For Europe)

0.7 - 0.9V

-


L

5 seconds after turning ignition switch "ON" and thereafter



L IACV-AAC valve (Open111

5B

ing signal: Except for Europe and Israel)

10 - 13V Idle speed

l

IEngine is running.1 51.."" wheel t, be'" I,med Air conditioner is operating. Rear window defogger switch is "ON". Lighting switch is "ON".

EC-86

Approximately 5.0V

TROUBLE DIAGNOSES - General Description [ill ECM Terminals and Reference Value (Cont'd) TERMINAL NO.

WIRE COLOR

CONDITION

ITEM

DATA


L

PU/W

IACV-AAC valve (Closing signal: Except for Europe and Israel)

t

~gine

7 - 13V Idle speed is running.1

Stee,'", wheel', be'", t,med Air conditioner is operating. Rear window defogger switch is "ON". Lighting switch is "ON".

11 - 14V

113 IEngine is running.1

L 5B

IACV-AAC valve (For Europe and Israel)

11 - 14V Idle speed

I~ngine is running.1

~

Steee'", wheel " be'", t,med Air conditioner is operating. Rear window defogger switch is "ON". Lighting switch is "ON".

1 - 10V


115

P/B

Torque converter clutch solenoid valve (A/T models except for Europe and Israel)

L


IEngine is running

L

I (Warm-up

condition)

Vehicle speed is 60 km/h (37 MPH) or more in "0" position.

EC-87


•

TROUBLE DIAGNOSIS FOR POWER SUPPLY Main Power Supply and Ground Circuit

7.5A

'iIi'

Refer to EL-POWER.

30A

OJ

[ill W~L

<:MID

~

0-<0- W!L ~

G

W/L ---

m

.....

Refer to EL-POWER. ST IGNITION

~

W!L

SWITCH

IE7n7\

OF

d::,~

I~I

~

EC-MAIN-01

/

JUNCTION BOX NO.2 (JOINT CONNECTORS)
"T

0-<0- W/L ~

I

__

4=Jl B/R I

W!L ~

@Jew

O--
~~

~

W/L (F4)

~~1~

•

..... -_,.-.--=--.1 I

IT ~I

tU"Affi

14~1 BATT

I

W/R

WIG

m

SSOFF

B/R

B/R

~T @4=U

@36 -:

VB

-: tcr:n\

Detectable line for DTC Non-detectable line for DTC

B/R

I

B/R

n*ll

114'71 11~1

VB

@44

~__
'-9-
I;BI

~H :

T~ 1bi=U@

B/R

lbi=Jl1!:idl

W/L

B/R

~$

ECCS ~ RELAY @

W/R

Israel

@: Except@ @: For Europe @: Except@

I

W/L

WIG

laiml ~~1~ 1$1

I

I

W/L

B/R

B/R

-
(1J: LHD models @: RHO models @: For Europe and

~

B/R

W/L ~

W/L ~


IGN SW

CRTN

em

Refer to last page (Foldout page) .

~------------------~

fJjlll~@ 3456 W

~'I'fIl@ 4567B

W

+@:mm f3T5m 2 1 L :~@~@
I L

W

W

: I

~

HEC026

EC-88

TROUBLE DIAGNOSIS FOR POWER SUPPLY []K] Main Power Supply and Ground Circuit (Cont'd) Except GA 16DE for Australia

EC-MAIN-02 -: -:

GND -C 13•91

B

GND -C 1~81 B

GND -1

.~ B/W

GND -1

~

B/W

GND -E 1 l 1 B/Y

r

GND -E 11~1 B/Y

Detectab Ie 1ine for DTC Non-detectable line for DTC


GND -E 11~61 B/Y

•

em

L. L._._._. ~

B

B/Y

L~ -!-

(F14)

<:ED L

HEC027

EC-89

TROUBLE DIAGNOSIS FOR POWER SUPPLY @KJ Main Power Supply and Ground Circuit (Cont'd) GA16DE for Australia

EC-MAIN-01 7.5A

Refer to EL-POWER.

30A

IT]

~ W/L tE77\i\ r=:b~ I~ICMID

Refer to EL-POWER.

W/L

IctJl~ =r@

ST IGNITION SWITCH ~

W/L I

e,--,,-, W/L

I4J B/R

W/L

I

IT ~I

B/R tE77\i\ r=:b~ I~I
ECCS ~ RELAY

@

lbf=n~ WIG

B/R

W/R

I "__~

W/L

WIG

m

17~1 BATT

SSOFF

W/R

W/R

1I~61

If6TI

VB

VB

tm'i'\\

cb~ '4=ll@ B/R

I

B/R ~ IGN SW

GND -C

GND -C

GND -I

GND -I

GND -E

GND -E

GND -E

13.9I

I ~31

~

~

n1~61 11~21 111:81

B

B

B/W

B/W

B/Y

B/Y

I

I

I

I

I


em

B/Y

L, I_I ,-e-e-=e---J I B

B

~..I

-!-

3456

L~ -!

ffi

CF13)

III' I 'liJ

B B/Y -: -:



(ffi W

T ~

@ L

~~

t3RIID

W

101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118

HEC062

EC-90

TROUBLE DIAGNOSIS FOR POWER SUPPLY ~ Main Power Supply and Ground Circuit (Cont'd) INSPECTION START

II

ECM 36

36

Start engine. Is engine running?

@:

@ @ :

For Europe and Israel

Yes

-=

Except for Australia and Europe and Israel : For Australia

CHECK POWER SUPPLY-I. 1. Turn ignition switch "ON". 2. Check Yoltage between ECM terminal @, @ or @ and ground with CONSULT or tester. Voltage: Battery voltage If NG, check the following . • Harness connectors

SEF132R

~i) II

ECM

GD,@orUD, @

P!CONNECTORII

46

• Harness connectors

70

OO,@)) • Harness for open or short between ECM and ignition switch If NG, repair harness or connectors.

@: Except for Australia @ : For Australia

-!.OK

SEF133R

III

Go to "CHECK GROUND CIRCUIT" on next page.

~i) ECM

E[coNNECTORII

~;~~

~

@ , @: @, @:

~FF

Except for Australia For Australia

Check the following. • Harness connectors

CHECK POWER SUPPLY-II. 1. Stop engine. 2. Check voltage between ECM terminal ~ or @) and ground with CONSULT or tester. Voltage: Battery voltage

CID, @O)ui)r UD, @or

F4,@

• Harness connectors 00, @)) or Cill,

@

OK

SEF134R


@,@))

II

• Joint connector @ • 7.5A fuse • Harness for open or short between ECM and battery If NG, repair harness or connectors.

~85 ~r5 EJ

ECM

CONNECTOR

II

~'.S~

~53

1

~

[!] @ , @: @ ,@:


SEF135R

CHECK POWER SUPPLY-III. 1. Turn ignition switch "ON" and then "OFF". 2. Check Yoltage between ECM terminals @, @, or @, i@ and ground with CONSULT or tester. After turning ignition switch "OFF", battery voltage will exist for a few seconds, then drop to approximately

av.

NG Case-2 Case-1

EC-91

~

III


Case-1: Battery voltage does not exist for a few seconds. Case-2: Battery voltage exists for more than a few seconds. Go to [!1 "CHECK ECCS RELAY" on next page.

•

TROUBLE DIAGNOSIS FOR POWER SUPPLY ffiJ Main Power Supply and Ground Circuit (Cont'd) @

1

(i]

CHECK HARNESS CONTINUITY BETWEEN ECCS RELAY AND ECM 1. Disconnect ECM harness connector. 2. Disconnect ECCS relay. 3. Check harness continuity between ECM terminals @, @, or @, @ and terminal @. Continuity should exist. If OK, check harness for short.

NG

--..

Check the following . • Harness connectors

SEF129R

OK

Ii

Repair harness or connectors.

~''fflDr~, M41 or F4 , M71 • Harness connectors ~,@IDorQD, M78

CHECK VOLTAGE BETWEEN ECCS RELA Y AND GROUND. 1. Check voltage between terminals G), @ and ground with CONSULTor tester. Voltage: Battery voltage

NG ---+-

• Harness connectors @,@ID • Joint connector

@ • Harness for open or short between ECCS relay and battery If NG, repair harness or connectors.

OK AEC6B4

Ii CHECK OUTPUT SIGNAL CIRCUIT. 1. Check harness continuity between ECM terminal @ and terminal @. ContinUity should exist. If OK, check harness for short.

NG

~


OK

[I

CHECK ECCS RELAY. 1. Apply 12V direct current between relay terminals G) and @. 2. Check continuity between relay terminals @ and @. 12V (G) - @) applied: Continuity exists. No voltage applied: No continuity OK

SEF023M

EC-92

~

Replace ECCS relay.

em

TROUBLE DIAGNOSIS FOR POWER SUPPLY Main Power Supply and Ground Circuit (Cont'd) Except for Australia

~i5~ II

ECM

B'

CONNECTOR

CHECK GROUND CIRCUIT. 1. Turn ignition switch "OFF". 2. Loosen and retighten engine ground screws. 3. Disconnect ECM harness connector. 4. Check harness continuity between ECM terminals @, @, @, @, Gill, Gill, Gill, or @), @, @, @, GID, GID, @ and engine ground. Continuity should exist. If OK, check harness for short.

II

.6-13-39-107-108-116 ,

For Australia

~i5@a II

ECM

B'

CONNECTOR

.10-19-39-43-106-112-118

OK

Che~k ECM pin terminals for damage or the connection of ECM harness connector.

II

,

INSPECTIONEND

SEF136R

EC-93

NG


•

TROUBLE DIAGNOSIS FOR DTC 11 Camshaft Position Sensor (CMPS) The camshaft position sensor is a basic component of the EGGS. It monitors engine speed and piston position. These input signals to the EGM are used to control fuel injection, ignition timing and other functions. The camshaft position sensor has a rotor plate and a waveforming circuit. The rotor plate has 360 slits for a 1 (paS) signal (except for Europe and Israel) and 4 slits for a 180 (REF) signal. The wave-forming circuit consists of Light Emitting Diodes (LED) and photo diodes. The rotor plate is positioned' between the LED and the photo diode. The LED transmits light to the photo diode. As the rotor plate turns, the slits cut the light to generate rough-shaped pulses. These pulses are converted into on-off signals by the wave-forming circuit and sent to the EGM.

Light emitting diode

0

0

Wave

formingcircuit

SEF653B

1800 signal

Diagnostic Trouble Code Malfunction is detected when .... No. 11 • Either l' or 180' signal is not entered to ECM for the first few seconds during engine cranking.

Check Items (Possible cause)

• Harness or connectors (The camshaft position sensor circuit is open or shorted.) • Either l' or 180' signal is not entered to ECM often • Camshaft position sensor enough while the engine speed is higher than the • Starter motor (Refer to EL section.) • Starting system circuit (Refer to EL section.) specified engine speed. • Dead (Weak) battery

• The relation between l' and 180' signal is not in the normal range during the specified engine speed.

EC-94

TROUBLE DIAGNOSIS FOR DTC 11 Camshaft Position Sensor (CMPS) (Cont'd)

@KJ

DIAGNOSTIC TROUBLE CODE CONFIRMATION PROCEDURE

fiii\

\JV

1) 2)

---------~ ~

1) 2) 3)

Turn ignition switch "ON" and select "DATA MONITOR" mode with CONSULT. Crank engine for at least 2 seconds. OR ----------Crank engine for at least 2 seconds. Turn ignition switch "OFF", wait for at least 5 seconds and then turn "ON". Perform "Diagnostic Test Mode II" (Self-diagnostic results) with ECM.

•

EC-95


[]KJ


EC-CMPS-01 Refer to EL-POWER.

7.5A

JUNCTION BOX No.2 (JOINT CONNECTORS)

[11] W!L

~

6-

W!L

./L ~

~

./L

<:MID

----------.....:(B)-O

W!L

I

rT

~

W!L

JOINT CONNECTOR-6

t.J 1

ffi)

:.I

:

:

I

I

GY

@

..._...--.1 ri-i

W!R WIG

I I

J

~~ REF REF

I

W!R W!R W!R WIG

~ff17n~m CRTN VB

VB SSOFF


em

ffi)

~cw

ITIIJ:IITIIill

I I I

ECCS RELAY

lbjJJ~

~=~. "

.--rq~==~

~

L (

W!L

I[XI

t

~ B

11 B

I

4n @

• W!R

~

B

@22

W!L@

m

B

@30

W!L

DISTRIBUTOR (CAMSHAFT POSITION SENSOR)

I

*2: @31

@ 40

~-==_-==~~ -----
Detectable line for OTC Non-detectable line for DTC

@

*1 :

<:MID

W!L ~

(b): LHD models @: RHO models @: For Europe @: For Israe 1

~'I'I~@ 3456 W

A@ T


L

HEC028

EC-96

mJ

TROUBLE DIAGNOSIS FOR OTC 11 Camshaft Position Sensor (CMPS) (Cont'd) Except for Europe and Israel

EC-CMPS-02 BATTERY

]

7.5A

Refer to EL-POWER.

-:

ffi]


-:

W!L

I

W/L

I

~CBID

W/R

m

W!L

I~IQMD @) W/L

I

Ti

W!L

~~~ L

W!L

IT]I

ECCS ~ RELAY

t

(

W/R

.I--_.. I

T, WIG

W/R

W/R

SSOFF VB

VB

mmIT17TI

B/W

---

I' I I I I I I I I I I I I

1bf=!J~(U) WIG

•

tE7iIT\

1FsB1~

B

, 1

... I I I I I I I I I I I

JOINT CONNECTOR-6

ern

I

l'" --- .... --iCY=_ -=~-•

iT T,

L

L

B/W

B/W

12~1';01 If31iI I 4.0 I REF

REF

POS

POS

ECM (ECCS CONTROL MODULE) (ill

8

II

B

8

t.J m1

(l=J3)


~'4

5 6 I7'~8 @) W

~
~ern

[[[[OOJOJOJD

GY

HEC029

EC-97

rn:J

TROUBLE DIAGNOSIS FOR DTC 11 Camshaft Position Sensor (CMPS) (Cont'd) GA16DE for Australia

EC-CMPS-01 Refer

to

-:

EL-POWER.

-:


W/L

I W/L

IE7iU\

r=::b'!JQ.!.,

I~I@

w!L

1m, ~ =r ern


W/L

I

T-, W!L

m

1hp~lbi=!J L

W/L

t

ECCS ~ RELAY

(

'"

I~~I U:::i=JIlbiJcrn

B/W

---

r---

.-1"I I

I I I I

WIG W/R

.I--_ .. I

"

WIG W/R W/R

I

I I I I

~.----.-.~=_~=m--•

r' "

14.0 I VB

JOINT CONNECTOR-6

l@

L

fi1=il~~ SSOFF VB

B

L

B/W

n14n ~

REF REF

....,

B/W

114'51

POS POS


em

B

3456

W

+ 2

1

5

crn L

~@ [I[illlI[!ll]

GY

B

t.... 1 (ffi)

fIJ' I 'fi) ern

B

m


101 102 103 104 105 106 107 lOB 109 110 111 112 113 114 115 116 117 118

HEC063

EC-98

TROUBLE DIAGNOSIS FOR DTC 11 Camshaft Position Sensor (CMPS) (Conl'd) Camshaft position sensor harness connector

\

PROCEDURE

INSPECTIONSTART

AEC815

SEF524Q

~i5

DIAGNOSTIC

~

@a

(i1'lmI51~

SEF463Q

CHECK POWER SUPPLY. 1. Turn ignition switch "OFF". 2. Disconnect camshaft position sensor harness connector. 3. Turn ignition switch "ON". 4. Check voltage between terminal @ and ground with CONSULT or tester. Voltage: Battery voltage

CHECK GROUND CIRCUIT. 1. Turn ignition switch "OFF". 2. Loosen and retighten engine ground screws. 3. Check harness continuity between terminal @ and engine ground. Continuity should exist. If OK, check harness for short.

NG

NG

Check the following. • Harness for open or short between camshaft position sensor and ECCS relay If NG, repair harness or connectors .



CHECK INPUT SIGNAL CIRCUIT. 1. Disconnect ECM harness connector. 2. Check harness continuity between terminal @ and ECM terminals @. @), or @, @ or @, @ terminal @ and ECM terminals @), @ or @,@. Continuity should exist. If OK, check harness for short. OK

CHECK COMPONENT (Camshaft position sensor). Refer to "COMPONENT INSPECTION" on next page. OK

Disconnect and reconnect harness connectors in the circuit. Then retest. Trouble is not fixed. Check ECM pin terminals for damage or the connection of ECM harness connector. Reconnect ECM harness connector and retest.

INSPECTIONEND

EC-99

NG

Replace camshaft position sensor.

•


~io

@]

Il

ECM ~29,

@, @: @, @:

ECONNECroRl1

@KJ

~IO ~JlI0

~

For Israel For Europe

~ IDISCO~ l41 V

~io

~~TGo[rnID

1=1

=E=CM=:!iE[il=CO=NN=EC=ro=RII

@, @ , @, @ : @,@,@,@ :


@a SEF137R

COMPONENT

INSPECTION

Camshaft position sensor 1. Start engine. 2. Check voltage between camshaft position sensor terminals CID, @ and ground with AC range. Terminal

Voltage

@ : Except for Europe and Israel

@: For Europe and Israel (180. AEC689

signal)

Tester's pointer fluctuates between 5V and OV.

@ : Except for Europe and Israel (1. signal)

3. If NG, replace distributor assembly with camshaft position sensor. 4. Remove distributor cap. Visually check signal plate for damage or dust. After this inspection, diagnostic trouble code No. 11 might be displayed with camshaft position sensor functioning properly. Erase the stored memory. SEF887K

EC-100

TROUBLE DIAGNOSIS FOR DTC 12 Mass Air Flow Sensor (MAFS)

SEF154N

The mass air flow sensor measures the intake air flow rate by taking a part of the entire flow. Measurements are made in such a manner that the ECM receives electrical output signals varied by the amount of heat emitting from the hot wire placed in the stream of the intake air. When intake air flows into the intake manifold through a route around the hot wire, the heat generated from the hot wire is taken away by the air. The amount of heat depends on the air flow. On the other hand, the temperature of the ..hot wire is automatically controlled to a certain number of degrees. Therefore, it is necessary to supply the hot wire with more • electric current in order to maintain the temperature of the hot wire. The ECM knows the air flow by means of the electric c~ange.

SEF695K

Diagnostic Trouble Code No. 12

Check Items


(Possible Cause)

• An excessively high or low voltage from the sensor • Harness or connectors is entered to ECM. (The sensor circuit is open or shorted.) • Mass air flow sensor


rif\

1)

~ 2) 3)

Turn ignition switch "ON", and wait for at least 6 seconds. Select "DATA MONITOR" mode with CONSULT. Start engine and wait for at least 3 seconds.

----------OR

r
1)

~ 2) 3) 4)

----------

Turn ignition switch "ON", and wait for at least 6 seconds. Start engine and wait for at least 3 seconds. Turn ignition switch "OFF", wait for at least 5 seconds and then turn "ON". Perform "Diagnostic Test Mode II" (Self-diagnostic results) with ECM.

EC-101

TROUBLE DIAGNOSIS FOR DTC 12 Mass Air Flow Sensor (MAFS) (Coni' d) GA14DE, 16DE engine for Europe and Israel, and GA15DE engine

EC-MAFS-01 7.5A

Refer

to

EL-POWER.

[ill W

:

i

LHD mode1s RHO models For Europe and Israe 1 Except@

@:

L

0-<:0-

W!L ~

@:

@:

W!L

_.


-:

W!L d= (EI0l) I~I CHID / ~RL

JUNCTION BOX NO.2 (JOINT CONNECTORS)

'T'

0-<:0-

I

q---~

~ W/L

W!L

W/R

@)@

O-
-

4D-

W/L ~

W/L ~

W/L ~

W/L

~cm

I

MASS AIR FLOW SENSOR

-
.-

r-'

W/L

rrh
t

lbj:n

~ B

G

W/L

It ~I WIG

W/R

@

W/R

m~rr17n VB

!t

. I I

~

I i-t-O~

SSOFF

!

I

I I

~~

W/R

1

I

ECCS ~ RELAY

WIG

;

~~ B

W/R

~

riN9n VB

CRTN

B

GND -A

G

":91

~ GND QA+ -A

ECM (ECCS

JOINT CONNECTOR -6

W

r~1 B B I..J •

Sg~GE~f -!(IT)

~1111~cm 3456

W

T.

~1111~cm 4567B W

J&Lm

= ill)


-~-@

ITIITITIITIII

ffi

B

GY

@

2

1

L

5

HEC030

EC-102

TROUBLE DIAGNOSIS FOR DTC 12 Mass Air Flow Sensor (MAFS) (Cont'd) GA 16DE engine models except for Europe and Israel

EC-MAFS-02 -:

Refer to EL-POWER.

-:


W!L

I

W!L

1$1

(~~1;

rn

IEtJI QHD

=r CfID


W!L

rn>

I

T-,

t

W!L W!L

lbiJ~ OR

W

" ....1

(

n

IT~I

ECCS RELAY

U (IT)

~~

WIG W!R

.I--_.

I' 1 1 1 1 1 1 1 I

1 1 1 1

"

WIG W!R W!R

~!

t

I

I I

I 1 1 I I

I I I

JOINT CONNECTOR

em

.....--u1

~....

,

1----

I

OR

~

W

1rf6il~

IFh~Wfl SSOFF V8

•

I

W!R

W!L

V8

QA+

QA-


em

8

I

l!jj CEID W

+ 2

1

8

t...J 1 ffi

~I 45678

II

8

ill


(IT) L

~em

~rn>

ill]]]D

8R

5

UI.ill.I.ITIIII

GY

HEC031

EC-103

TROUBLE DIAGNOSIS FOR OTC 12 Mass Air Flow Sensor (MAFS) (Conl'd) GA16DE for Australia

EC-MAFS-01 Refer to EL-POWER.

-: -:

W/L


I W /L

tETt'i7\

r=b~ I~I@)

W/R

W/L

11iJ,@

W

3MASS AIR

=r@ W/L

I

OR

W/L

t

ECCS ~ RELAY

I I I

I I I 1

"

JOINT

I I I

CONNECTOR-6 @

--.~=-

I

I ...

r,

I

-=~I--""

OR

W/R

mlf5'sil~ SSOFF VB

I.

I

W/R

W/R

,

(

.I--_ ... WIG

W

I' I I

I~~I ~U:jJJ@ WIG

SENSOR

4=!Ilbj:Jlrn>

T.

W/L

FLOW

W

II}; 1 14-81 QA+

VB

QA-


em

B

11 B

8

t...l 1 ~

~

Refer to last page

11[iJ 3456

~I

@ W

(Foldout

~@

~~

IIIIlII.IIIITJ

~BR

page) .

GY

101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118

HEC064

EC-104

TROUBLE DIAGNOSIS FOR DTC 12 Mass Air Flow Sensor (MAFS) (Conl'd) DIAGNOSTIC

For Europe ~ GA15DE engine and Israel

I~

",,~~)rl

\~\" /JJ~ ' Mass air flow sensor

PROCEDURE

INSPECTION START

connector 1 _ harness ==---,

I-

1

I

I

~ Mass air flow sensor

d.-

I

;~

~(~lr~~

SEF138R

CHECK POWER SUPPLY. 1. Turn ignition switch "OFF". 2. Disconnect mass air flow sensor harness connector. 3. Turn ignition switch "ON". 4. Check voltage between terminal @ and ground with CONSULT or tester. Voltage: Battery positive voltage

NG


OK

CHECK GROUND CIRCUIT. 1. Turn ignition switch "OFF". 2. Disconnect ECM harness connector. 3. Loosen and retighten engine ground screws. 4. Check harness continuity between terminal @ and ECM terminal @ or @ or engine ground. Continuity should exist. If OK, check harness for short.

CHECK INPUT SIGNAL CIRCUIT. Check harness continuity between terminal CD and ECM terminal @ or @. Continuity should exist. If OK, check harness for short.

NG

NG



*1 For Europe and Israel, and GA15DE engine *2 : GA16DE engine models except for Europe and Israel SEF139R CHECK COMPONENT (Mass air flow sensor). Refer to "COMPONENT INSPECTION" on page EC-107.

Disconnect and reconnect harness connectors in the circuits. Then retest. Trouble is not fixed.

Check ECM pin terminals for damage or the connection of ECM harness connector. Reconnect ECM harness connector and retest.

,~\

INSPECTION END

C/

Power steering\' tluic! reservxr ..--\

W~

/,

'"

Meo,"""

EC-105

NG

Replace mass air flow sensor.

•

TROUBLE DIAGNOSIS FOR DTC 12 Mass Air Flow Sensor (MAFS) (Cont'd) Ii)

For Europe and Israel, and GA15DE engine

~i5 cill1D GA16DE engine models except for Europe and Israel

~15 1='

=E=CM==:!iH

CONNECTOR

17

@ : @ : [!J

II

48


For Europe and Israel, and GA15DE engine models

~i5 II

SEF140R

ECM

Ef

CONNECTOR

~i5 II

c:illli:>

16

@a GA16DE engine models except for Europe and Israel

II

~io ECM

El'CONNECTORII 16

@:

~i5 ULffhD

47


47 : For Australia

SEF141R

EC-106

TROUBLE DIAGNOSIS FOR DTC 12 Mass Air Flow Sensor (MAFS) (Cont'd) COMPONENT

INSPECTION

Mass air flow sensor 1. Turn ignition switch "ON". 2. Start engine and warm it up sufficiently. 3. Check voltage between terminal CD and ground. Conditions

*

-

-

1 : For Europe and Israe( and GA 15DE engine models *2 : GA 16DE engine models except for Euro e and I rael SEF142R

4.

Voltage V

Ignition switch "ON" (Engine stopped.)

Less than 1.0

Idle (Engine is warmed-up sufficiently.)

1.2 - 1.8

If NG, remove mass air flow sensor from air duct. Check hot wire for damage or dust.

SEF154N

EC-107

•

TROUBLE DIAGNOSIS FOR DTC 13 Engine Coolant Temperature

Sensor (ECTS)

The engine coolant temperature sensor is used to detect the engine coolant temperature. The sensor modifies a voltage signal from the ECM. The modified signal returns to the ECM as the engine coolant temperature input. The sensor uses a thermistor which is sensitive to the change in temperature. The electrical resistance of the thermistor decreases as temperature increases.

SEF594K

< Reference data>

20

18

Engine coolant temperature 'C ('F)

Voltage (V)

Resistance (kQ)

-10 (14)

4.4

7.0 - 11.4

0.4

20 (68)

3.5

2.1 - 2.9

0.2

50 (122)

2.2

0.6 - 1.0

90 (194)

0.9

0.23 - 0.26

6

9

4

B Iii

2 10 1ii 0.8

'0

£

0.1

-20 0 20 40 60 80 100 (-4) (32) (68)(104)(140)(176)(212) Temperature 'C (OF)


SEF012P

Check Items (Possible Cause)


• An excessively high or low voltage from the sensor • Harness or connectors is entered to ECM.

(The sensor circuit is open or shorted.) • Engine coolant temperature sensor

DIAGNOSTIC TROUBLE CODE CONFIRMATION PROCEDURE (F.i\ 1) Turn ignition switch "ON". ~ 2) Select "DATA MONITOR" mode with CONSULT. 3) Wait for at least 5 seconds.

------------OR-----------fU\ 1) Turn ignition switch "ON" and wait for at least 5 sec~ 2) 3)

onds. Turn ignition switch "OFF", wait for at least 5 seconds and then turn "ON". Perform "Diagnostic Test Mode II" (Self-diagnostic reSUlts) with ECM.

EC-108

TROUBLE DIAGNOSIS FOR DTC 13 Engine Coolant Temperature (Cont'd)

~ Sensor (ECTS)

EC-ECTS-01

ENGINE COOLANT TEMPERATURE SENSOR

m

@:

For Europe and Israel @: Except@ *1",@

-: -:

t

B

GY, @BR!Y


B

~

~

GND

GND

-A

-A


em

lZlfll)
GY

HEC032

EC-109

•


[]K] Sensor (ECTS)


EC-ECTS-01

~ENGINE

COOLANT TEMPERATURE SENSOR (ffl)

U:iJ

BR/Y

lbi=ll

-:

B

-:


t

BR/Y

B

IT5TI

115"0 I GND

TW

-A


em

~
GY

101 102 103

104 105 106

107 108 109

110 HI H2

113 114 115

116 117 118

HEC065

EC-110

TROUBLE DIAGNOSIS FOR DTC 13 Engine Coolant Temperature (Cont'd) temperature

Engine coolant sensor harness connector

~/

DIAGNOSTIC

~ Sensor (ECTS)

PROCEDURE

INSPECTION START

m CHECK POWER SUPPLY. 1. Turn ignition switch "OFF". 2. Disconnect engine coolant tempera-

NG

ture sensor harness connector. 3. Turn ignition switch "ON" 4. Check voltage between terminal @

~Io

Check the following. • Harness for open or short between ECM and engine coolant temperature sensor If NG, repair harness or connectors.

and ground with CONSULT or tester. ~oltage: Approximately SV

Ii) ~ SEF518Q

CHECK GROUND CIRCUIT. 1. Turn ignition switch "OFF". 2. Check harness continuity between terminal G) and engine ground.

NG

Check the following. • Harness for open or short between ECM and engine coolant temperature sensor If NG, repair harness or connectors.

NG

Replace engine coolant temperature sensor.

Continuity should exist. If OK, check harness for short.

~Io

ten

CHECK COMPONENT (Engine coolant temperature sensor). Refer to "COMPONENT INSPECTION" on next page.

SEF519Q



INSPECTION END

EC-111

•

TROUBLE DIAGNOSIS FOR DTC 13 Engine Coolant Temperature , '(Cont'd) COMPONENT

@KJ Sensor (ECTS)

INSPECTION

Engine coolant temperature sensor Check resistance as shown in the figure. Temperature

SEF152P

°C (OF)

Resistance kQ

20 (68)

2.1 - 2.9

50 (122)

0.68 - 1.00

90 (194)

0.236 - 0.260

If NG, replace engine coolant temperature sensor.

EC-112

TROUBLE DIAGNOSIS FOR DTC 21 Ignition coil transistor

Ignition Signal

& power

harness connectors

COMPONENT

DESCRIPTION

Ignition coil & power transistor (Built into distributor) The ignition coil is built into distributor. The ignition signal from the ECM is sent to the power transistor. The power transistor switches on and off the ignition coil primary circuit. As the primary circuit is turned on and off, the proper high voltage is induced in the coil secondary circuit. AEC832




• The ignition signal in the primary circuit is not entered to ECM during engine cranking or running.

• Harness or connectors (The ignition primary circuit is open or shorted.) • Power transistor unit. • Resistor • Camshaft position sensor • Camshaft position sensor circuit

DIAGNOSTIC TROUBLE CODE CONFIRMATION PROCEDURE Note: If both DTC 11 and 21 are displayed, perform TROUBLE DIAGNOSIS FOR DTC 11 first. Refer to EC-94. (F.i\ 1) Turn ignition switch "ON". ~ 2) Select "DATA MONITOR" mode with CONSULT. 3) Start engine.

----------OR 1) 2) 3) 4)

----------

Turn ignition switch "ON". Start engine. Turn ignition switch "OFF", wait for at least 5 seconds and then turn "ON". Perform "Diagnostic Test Mode II" (Self-diagnostic results) with ECM.

EC-113

•

TROUBLE DIAGNOSIS FOR OTC 21 Ignition Signal (Cont'd)

EC-IGN/SG-01 :

LHD models (8): RHO models @: For Europe and Israel @: Except @ Detectable line -: for DTC Non-detectable -: line for DTC

Refer to EL-POWER.

30A

OJ G

m OFF

ST

'e-

ACC

IGNITION SWITCH @

4J B/R

~

t

•

4>1> m~ B/R

B/R

CONDENSER DISTRIBUTOR

IGNITION COIL

POWER TRANSISTOR

B/R

~@

B/R

B/R

1>J 4-'

~

~~

W/B B/W

G

I

B/R

II

t

II

.-

G

B/R

IctJ,

IrtJl @ =r CEID

(H) 9F

B/R

B/R

W

RESISTOR

SPARK PLUG ECM (ECCS CONTROL MODULE)

~--------------------~

GY/R

nB

W/B

rn IGN

m IGN

B/Y B

f.J 1 m

CK

I

, I L

I I j

W

fIll I II~

(H) W

4567BI

~I

ffi)

r---------------------,

I

W

To ECM (ECCS control module)

~

(IT)

:~@R@
-

B/Y.

2

tJ

3456

W

'le'(tiQ])

QID~

@

~

I I

~w:GY L

j


I I

'Ill <£IDW

HEC033

EC-114

TROUBLE DIAGNOSIS FOR DTC 21 Ignition Signal (Cont'd) GA16DE for Australia

EC-IGN/SG-01 Refer to EL-POWER.

30A

-:

OJ

-:

IGNITION SWITCH @

'e-

ACC


•

B/R 7

~

B/R r=b(fW

lap'CM[)

t


IGNITION COIL

B/R IUJI@

m

POWER TRANSISTOR

'9Fem B/R

~

~lkj:!J

~

W/B

G

B/W

t II

II

.-

G

W

To ECM

B/Y .. (ECCS control ~ module)

RESISTOR ~

2

GY/R

W/B

m

SPARK PLUG

m

IGN

IGN

CK


CED

B/Y

n B

B

i.J 1 ~ rn

r-------------------, I I

~@W

GImJ

I

W

1)(1

B:I! em 3456I'~ W : (11213\41516)

m GY

I

I I

1Zl~'

CZIID

GY

~-------------------~


: I

101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118

HEC066

EC-115

TROUBLE DIAGNOSIS FOR DTC 21 Ignition Signal (Cont'd) DIAGNOSTIC

PROCEDURE

INSPECTION START

Turn ignition switch "OFF", and restart engine. Is engine running?

Yes

No

AEC832

CHECK POWER SUPPL V. 1. Turn ignition switch "OFF". 2. Disconnect ignition coil harness connector. 3. Turn ignition switch "ON". 4. Check voltage between terminal (J) and ground with CONSULT or tester. Voltage: Baltery voltage

NG

QD,@orGD. @ • Harness connectors

@.
• Harness for open or short between ignition coil and ignition switch If NG, repair harness or connectors.

OK

SEF468Q

~15 @3

CHECK GROUND CIRCUIT. 1. Turn ignition switch "OFF". 2. Disconnect power transistor harness connector. 3. Check harness continuity between terminal @ and engine ground. Continuity should exist. If OK, check harness for short.


NG


OK

ill~

SEF469Q

CHECK INPUT SIGNAL CIRCUIT. 1. Disconnect ECM harness connector. 2. Check harness continuity between ECM terminal G) and power transistor terminal G). Continuity should exist. If OK, check harness for short.

NG


OK

~85 II

ECM

~CONNECTORII

~85 (tI2IffllsI6)

CHECK COMPONENTS (Ignition coil, power transistor). Refer to "COMPONENT INSPECTION", EC-118.

1

OK

•

Disconnect and reconnect harness connectors in the circuit. Then retest. SEF470Q

Trouble is not fixed. Check ECM pin terminals for damage or the connection of ECM harness connector. Reconnect ECM harness connector and retest.

INSPECTION END

EC-116

NG

Replace malfunctioning component(s).

TROUBLE DIAGNOSIS FOR DTC 21 Ignition Signal (Cont'd) @

(;J CHECK INPUT SIGNAL CIRCUIT.

NG

1. Stop engine. 2. Disconnect ignition coil harness con-


nector. 3. Strip tape covering resistor and disconnect the connector. 4. Disconnect ECM harness connector.

~io

~i8

cffiJ

dIb

5. Check harness continuity between ignition coil terminal @ and resistor terminal (!), resistor terminal @

•

and ECM terminal @ or @. Continuity should exist. If OK, check harness for short. OK CHECK COMPONENTS (Resistor). Refer to "COMPONENT INSPECTION" on next page.

~i5 1=1

=E=CM====!:E' CONNECTOR

II

Disconnect and reconnect harness connectors in the circuit. Then retest.

3

Trouble is not fixed.

@3) CD :

For Australia

@ :


SEF143R


INSPECTION END

EC-117

NG

Replace resistor.

TROUBLE DIAGNOSIS FOR DTC 21 Ignition Signal (Co nt' d) COMPONENT

INSPECTION

Ignition coil 1. Disconnect ignition coil harness connector. 2. Check resistance as shown in the figure. Resistance [at 25°C (7rF))

Terminal (j) -

CID

Approximately

(Primary coil)

(j) - secondary terminal on distrib-

Approximately

utor head (Secondary coil)

1Q 10 kQ

If NG, replace ignition coil. 3. For checking secondary coil, remove distributor cap. 4. Check resistance between ignition coil harness connector terminal q) and the secondary terminal on the distributor head. If NG, replace distributor.

Power transistor terminals

~

(615143121D

.B.. (~l..?)

Power transistor 1. Disconnect power transistor harness connector. 2. Check power transistor resistance between terminals @ and @ . Terminals @ and

Resistance

Result

NotOQ

OK

OQ

NG

CID

If NG, replace distributor. SEF473Q

Resistor 1. Disconnect resistor harness connector. 2. Check resistance between terminals CD and @. Resistance: Approximately 2.2 kQ [at 25°C (77°F)] If NG, replace resistor.

AEC841

EC-118

TROUBLE DIAGNOSIS FOR OTC 34 Knock Sensor (KS) The knock sensor is attached to the cylinder block. It senses engine knocking using a piezoelectric element. A knocking vibration from the cylinder block is sensed as vibrational pressure. This pressure is converted into a voltage signal and sent to the ECM.

PIEZO-ELEMENT SEF598K


Malfunction


is detected when ....

• An excessively low or high voltage from the knock sensor is entered to ECM.

• Harness or connectors (The knock sensor circuit is open or shorted.) • Knock sensor


rif\

1)

\J!I) 2)

Turn ignition switch "ON" and select "DATA MONITOR" mode with CONSULT. Start engine and run it for at least 5 seconds at idle speed.

----------

00

OR ---------1) 2) 3)

Start engine and run it for at least 5 seconds at idle speed. Turn ignition switch "OFF", wait for at least 5 seconds and then turn "ON". Perform "Diagnostic Test Mode II" (Self-diagnostic results) with ECM.

EC-119

•

TROUBLE DIAGNOSIS FOR DTC 34 Knock Sensor (KS) (Cont'd) Except for Europe and Israel

EC-KS-01


em

KNK 112:

-:

I

-:

w

Detectable line for DTC Non-detectable line for OTC

f .--------. I I I

I I I

I I

I I

l~ • w~ wOO f • I

I

I

I

I I

I I

I

I

I

rn

JOINT CONNECTOR-6

CW

1

I

I':

)

w

m KNOCK SENSOR

@g)

BR

~oo LL.@y B

~cw

I1IIIITITDII

GY

HEC034

EC-120

TROUBLE DIAGNOSIS FOR DTC 34 Knock Sensor (KS) (Cont'd) GA 16DE for Australia

EC-KS-01 -: -:



em

KNK

•

5 4 1 • 1

w f .------

I I I I

I I I I

I I

I I

1':- •

w

.....

w
rn

fI • I I I I I

JOINT CONNECTOR-6 (F2)

1

I I I I

!.:- j

w

m KNOCK SENSOR 0:102)

fl
\!.1.SJ

~@

rn:IIIITIIIII

GY

101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118

HEC067

EC-121

TROUBLE DIAGNOSIS FOR DTC 34 Knock Sensor (KS) (Conl'd) DIAGNOSTIC

For Europe and Israel, and GA15DE.L..l - en~ine

m\~\.Y ~:e?, Is

Eng~e ground @'~@)

1

PROCEDURE

_ INSPECTION START

J--

Loosen and retighten engine ground screws.

Fa CHECK INPUT SIGNAL CIRCUIT. 1. Turn ignition switch "OFF".

,~\

.~~


2. Disconnect ECM harness connector and knock sensor sub-harness connector. 3. Check harness continuity between terminal @ and ECM terminal @ or @. Continuity should exist. If OK, check harness for short.

C-/

Power steerin9\' fluid reservoir /' \

NG

--.

/-:

r

:,c"",

CHECK SUB.HARNESS CIRCUIT.

NG

Check the following.

1. Disconnect knock sensor harness


connector. 2. Check harness continuity

If NG, repair harness

@,@ between

connectors.

knock sensor harness connector terminal @ and knock sensor sub-harness connector terminal @. Continuity should exist. If OK, check harness for short. OK

Fa

II

~i5

CHECK COMPONENT (Knock sensor). Refer to "COMPONENT INSPECTION"

]9'CONNECTORII

ECM 27

54

on next page. OK

@: @:


For Australia Except for Australia


SEF144R

Check ECM pin terminals

for damage or

the connection of ECM harness connector. Reconnect ECM harness connector and retest.

INSPECTION END

SEF776Q

EC.122

NG

Replace knock sensor.

or

TROUBLE DIAGNOSIS FOR OTC 34 Knock Sensor (KS) (ConI' d) COMPONENT

INSPECTION

Knock sensor • Use an ohmmeter which can measure more than 10 MQ. 1. Disconnect knock sensor harness connector. 2. Check resistance between terminal @ and ground. Resistance: 500 - 620 kQ [at 25°C (77°F)] CAUTION: Discard any knock sensor which has been dropped or undergone shocks; use a new one. AEC719

•

EC-123

TROUBLE DIAGNOSIS FOR OTC 41 Intake Air Temperature

Sensor (IATS)

The intake air temperature sensor mounted to the air cleaner housing, detects intake air temperature and transmits a signal to the ECM. The temperature sensing unit uses a thermistor which is sensitive to the change in temperature. Electrical resistance of the thermistor decreases in response to the temperature rise. This sensor is not directly used to control the engine system. It is used only for the on-board diagnosis.

Diagnostic Trouble Code



No. a) An excessively low or high voltage from the sensor is entered to ECM.

41

• Harness or connectors (The sensor circuit is open or shorted.) • Intake air temperature sensor.

b) Voltage sent to ECM is not practical when compared with the engine coolant temperature sensor signal.

*

MONITOR

*

DIAGNOSTIC PROCEDURE

NO FAIL

COOLANTEMP/S

30°C

For the malfunction a) and b) 1) Wait until engine coolant temperature is less than 90°C ~ (194°F). (a) Turn ignition switch "ON". (b) Select "DATA MONITOR" mode with CONSULT. (c) Check the engine coolant temperature. (d) If the engine coolant temperature is not less than 90°C (194°F), turn ignition switch "OFF" and cool down engine. 2) Turn ignition switch "ON". 3) Select "DATA MONITOR" mode with CONSULT. 4) Wait for at least 5 seconds. ---------OR --------~ 1) Wait until engine coolant temperature is less than ~ 90°C (194°F.). (a) Turn ignition switch "ON". (b) Check voltage between ECM terminal @ and ground. Voltage: More than 1.2 (V) (c) If the voltage is not more than 1.2V, turn ignition switch "OFF" and cool down engine. 2) Turn ignition switch "ON" wait for at least 5 seconds. 3) Turn ignition switch "OFF", wait for at least 3 seconds and then turn "ON". 4) Perform "Diagnostic Test Mode II" (Self-diagnostic results) with ECM.

fF.I\

I

RECORD

SEF002P

II

ECM

a

CONNECT

CONNECTOR

~

II I) ~

51

SEF006P

TROUBLE CODE CONFIRMATION

EC-124

TROUBLE DIAGNOSIS FOR OTC 41 ~ Intake Air Temperature Sensor (IATS) (Cont'd) GA 16DE for Australia

EC-IATS-01

INTAKE AIR TEMPERATURE SENSOR ~ -: -:

•


t

R/Y ~ TA

B

15"0 I GND -A


em

@

~

GY

101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118

HEC073

EC-125

TROUBLE DIAGNOSIS FOR DTC 41 rnJ Intake Air Temperature Sensor (IATS) (Cont'd) DIAGNOSTIC

~ '" '\

--

ciili

INSPECTION START

Intake air temperature sensor harness connector

AEC550

~

PROCEDURE

CHECK POWER SUPPLY.

NG

1. Turn ignition switch "OFF". 2. Disconnect intake air temperature sensor harness connector. 3. Turn ignition switch "ON". 4. Check voltage between terminal @

between ECM and intake air temperature sensor If NG, repair harness or connectors.

and ground. Voltage: Approximately SV

DISCONNECT

10

CHECK GROUND CIRCUIT. 1. Turn ignition switch "OFF".

NG

2. Check harness continuity between terminal G) and engine ground. AEC723

Continuity should exist. OK

~i5 ~ dID

CHECK COMPONENT (Intake air temperature sensor). Refer to "COMPONENT INSPECTION" on next page. OK

AEC724


INSPECTION END

EC-126

Check the following. • Harness continuity

NG

Check the following. • Harness continuity between ECM and intake air temperature sensor If NG, repair harness or connectors Replace intake air temperature sensor.

TROUBLE DIAGNOSIS FOR DTC 41 @K] Intake Air Temperature Sensor (IATS) (Cont'd) COMPONENT

INSPECTION

Intake air temperature

sensor

Check resistance as shown in the figure.

20

Intake air temperature

19

'c

6

9

4

fl

2

ffi

10

2.1 - 2.9

50 (122)

0.68 - 1.0

'w

04 0.2 0.1 -20 0 20 40 60 80 100 (-4) (32) (68)(104)(140)(176)(212) Temperature 'c (OF)

Resistance kQ

20 (68)

iii 0.8

&

('F)

SEF012P

EC-127

•

TROUBLE DIAGNOSIS FOR NON-DETECTABLE

ITEMS

Throttle Position Sensor The throttle position sensor responds to the accelerator pedal movement. This sensor is a kind of potentiometer which transforms the throttle position into output voltage, and emits the voltage signal to the ECM. In addition, the sensor detects the opening and closing speed of the throttle valve and feeds the voltage signal to the ECM. Idle position of the throttle valve is determined by the ECM receiving the signal from the throttle position sensor. This one controls engine operation such as fuel cut. SEF089K

i

Supply voltage:

CIl

-i.~h __ ~3_

=~r--=-tfr ~N~ l ~_ r

1


45 'V

,Appl.'

b....

ffi

t~miMI, No 1 ,,'

31

I I

I

g -g '5 ::: 0.5 0'5 0 0 -----

OZ

-_.-- ------_. 0 90 Throttle valve opening angle (deg_)

EC-128

SEF520Q

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS Throttle Position Sensor (Cont'd)

~

EC-TPS-01 THROTTLE POSITION SENSOR

@: For Europe and Israe 1 _:

@

-:

fI

t


•

1 I

I

II

J J

I I

I I I

I

JOINT CONNECTOR-6

@

I:

.-.----...f~:==:P:JI---..

t P!L

Y

B

AVCC

TVO

GND -A

~~um

B

12"g I GND -A


em

JXL@

_.. ~@

IIIillITIIIIl

GY

HEC035

EC-129

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS Throttle Position Sensor (Cont'd) GA16DE for Australia

_.

THROTTLE POSITION SENSOR

-:

CEID

fI

t

EC-TPS-01 Detectable line for DTC Non-detectable line for DTC

"1

I I

I I I I

q J

I

I I I I I

I I

I I

I I I I I

I I I I I I I

I I J

I~

t

JOINT CONNECTOR-6

.-

em

rq

J y

P/L

J B

1:91 1:31

15.0 I

AVCC TVO

GND -A

-1

B


em

~CEID ~BR

~

n

B

B

!J 1

(fi3) (Fi4)

~cw

EIITIIIIIIIIJ

GY

101 102 103 104 105 106 107 lOB 109 110 111 112 113 114 115 116 117 11B

HEC068

EC-130


m

DIAGNOSTIC

GA15DE

PROCEDURE

INSPECTION START

1

m

CHECK POWER SUPPLY. 1. Turn ignition switch "OFF". 2. Disconnect throttle position sensor harness connector. 3. Turn ignition switch "ON". 4. Check voltage between terminal CD and ground with CONSULTor tester. Voltage: Approximately SV

1

NG

------.


0K

m

CHECK GROUND CIRCUIT. 1. Turn ignition switch "OFF". 2. Loosen and retighten engine ground screw. 3. Check harness continuity between terminal @ and engine ground. Continuity should exist. If OK, check harness for short.

1

NG

------.

Check the following. • Harness for open or short between ECM and throttle position sensor If NG, repair harness or connectors.

0K

[!J

CHECK INPUT SIGNAL CIRCUIT. 1. Disconnect ECM harness connector. 2. Check harness continuity between ECM terminal @) or @ and terminal

NG

------.


@. Continuity should exist. If OK, check harness for short. ~OK SEF480Q

ADJUST THROTTLE POSITION SENSOR. Perform "Basic Inspection", EC-65.

~ CHECK COMPONENT (Throttle position sensor). Refer to "COMPONENT INSPECTION" on next page. ~OK Disconnect and reconnect harness connectors in the circuit. Then retest. ~Trouble is not fixed. Check ECM pin terminals for damage or the connection of ECM harness connector. Reconnect ECM harness connector and retest.

i ,~\

C/

Power steering)\

INSPECTION END

~

EC-131

NG

------.

Replace throttle position sensor. To adjust it, perform "Basic Inspection", EC-65.

•


~io ~ SEF461Q

~i8 II

E

ECM

CONNECTOR

20

@: @:

II

23


SEF229R

COMPONENT

INSPECTION

Throttle position sensor 1. Disconnect throttle position sensor harness connector. 2. Make sure that resistance between terminals @ and @ changes when opening throttle valve manually. Throttle valve conditions Completely closed Partially open SEF146R

Completely open

Resistance (at 25'C (77'F)J Approximately 0.5 0.5 - 4.0

kn

kn

Approximately 4.0

kn

If NG, replace throttle position sensor. To adjust it, perform "Basic Inspection", EC-65.

EC-132


ITEMS

Vehicle Speed Sensor (VSS) LHD models

EC-VSS-01

FUSE BLOCK (JIB)

Refer

to

EL-POWER.

•

~

COMBINATION METER (SPEEDOMETER)

~ ~

~

R/Y

-illfr R/Y -lliW~ R

rITO)l~

0:@..; I~

~

R

~ ~

~I~

~

R/Y

-Ia~

I~

~ ~

R

VEHICLE ) SPEED (SENSOR

@ID

~

1*.51 PU/R

I

PUIR

IG"An\

d:::,~

@: Models with tachometer @: Models without tachometer

I~ICEID PU/R

I

*1... @30 , @40 *2"'@12 @33 *3... @10 '@15 *4"'@ 9 '@31 , *5... @ 13 , @32 -: Detectable line for DTC -: Non-detectable line for DTC

PU/R

~ VSP


ill)

B/R

-!~

Refer to last page (Foldout page) . L

~

~~

tIDID11ID

~@ID B

tID

GY

em L HEC036

EC-133

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS Vehicle Speed Sensor (VSS) (Cont'd) RHO models

EC-VSS-02 IGNITION SWITCH ON or START FUSE BLOCK (JIB)

10A

[]]

Refer

to

EL-POWER.

~


~ ~

R/Y .j~

~

rTIO\llE7iIT\

~

~

R

R/Y .j ~ 1E"n\1~

I'l:1Q.y

.j1IDJ-

~

R

I~

.j ~

R/Y~ ..gVEHICLE ) SPEED (SENSOR R

~

~

1*151 PUIR

I

PU/RtG7?l\

@: Models with

r=b~

tachometer without tachometer *1 @30 @40 *2 @ 12 '@33 *3 @ 10 '@ 15 *4 @ 9 '@31 , *5... @13 , @32 -: Detectable line for DTC -: Non-detectable line for aTC

I~I@ PU/R

@: Models

I

PU/R 1

13 21 VSP


em

B/R

-!
Refer to last page (Foldout page) . L

~

~~

tmm:lID

B

~WID

tgj

GY

em L

HEC037

EC-134

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS Vehicle Speed Sensor (VSS) (Conl'd) GA 16DE for Australia

EC-VSS-01 IGNITION SWITCH ON or START


-: -:

Refer to EL-PDWER.

FUSE BLOCK

10A

[]]

(JIB) (M15)

• COMBINATION METER (SPEEDOMETER)

~

R/Y ~~ ~I~ ~

~

~

U'U-

R/Y ,

R/Y~{1VEHICLE

~I~

I 'l::.!Q!, ~

R ,~

R

)

C

J ~

R

{]

SPEED SENSOR ~

@ ~

PU/R

I

PU/RIGM'l\ r=b,~ I~I@

PU/R

I

PU/R

1~61 VSP


B/R

-!-

(ill

~

~---------------------------------, Refer to last page (Foldout page) .

~~ ~ L

GY

~

@

w

Fff2T3T4j

IID:illIID

(E202) B

101 102 103 104 105 106 107 10B 109 110 111 112 113 114 115 116 117 11B

HEC069

EC-135

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS Vehicle Speed Sensor (VSS) (Conl'd)


@!J

The vehicle speed sensor is installed in the transaxle. It contains a pulse generator which provides a vehicle speed signal to the speedometer. The speedometer then sends a signal to the ECM.

AEC110

DIAGNOSTIC .V~HICLE

INSPECTION START

AFTER TOUCH START. DRIVE VEHICLE AT 10km/h (6mph) OR MORE WITHIN 15 see

l----

__

-N-EX-T

PROCEDURE

SPEED SEN CKT.

,~--'

-II

STA-RTMEF559D

-(;( MONITOR

-(;( NO FAIL

VHCL SPEED SE PIN POSI SW

0

20km/h OFF

CHECK OVERALL FUNCTION. 1. Jack up drive wheels. (ij\ 2. Perform "CAR SPEED SEN ~ CIRCUIT" or "VEHICLE SPEED SEN CKT'" in "FUNCTION TEST'" mode with CONSULT

OK

INSPECTION END

OR

2. Read "CAR SPEED SEN"' or "VHCL SPEED SE" signal in "DATA MONITOR" mode with CONSULT. CONSULT value should be the same as the speedometer indication. OR

RECORD SEF941N

fijf.....

CONNECT

1A1£) II

19'

ECM

CONNECTOR

32

26

fIr:J:J:. ~

~~ II

2. Turn ignition switch "ON". 3. Rotate drive whe'el by hand. 4. Check voltage between ECM terminal @ or @ and body ground. Voltage should vary between approx. 0 - 5V.

~ ~l

NG CHECK SPEEDOMETER FUNCTION. Make sure that speedometer functions properly. OK

@: @:


SEF230R

EC-136

NG

Check vehicle speed sensor and circuil. (Refer to "Inspectionl Speedometer and Vehicle Speed Sensor" of "METER AND GAUGES" in EL section.)

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS Vehicle Speed Sensor (VSS) (Cont'd)

m

Models with tachometer

II

ECM

@

CHECK INPUT SIGNAL CIRCUIT. 1. Turn ignition switch "OFF". 2. Disconnect ECM harness connector and combination meter harness connector. 3. Check harness continuity between ECM terminal @ and terminal @ or @, ECM terminal @ and terminal

@ : For Australia @ : Except for Australia

@. Continuity should exist. If OK, check harness for short.

Models without tachometer

OK

II


ECM


SEF147R


INSPECTION END

EC-137

NG


GD,@ • Harness for open or short between ECM and combination meter If NG, repair harness or connectors.

•


ITEMS

Start Signal

EC-S/SIG-01 Refer to EL-POWER.

_.

@: For Europe and Israle @: Except for Europe and

IGNITION ST SWITCH OF

~

7.5A

1261

-:

Israle Detectable line for DTC Non-detectable line for DTC

FUSE BLOCK (JIB)

~ UN•411

0:106)

B/Y

I

B/Y r::b@

I[QJI CEID B/Y

I

B/Y ~ ST

SW

ECM (ECCS

CONTROL MODULE) (IT)

r--------------------, I

IFmfl

: rmm
L

W


I

~

W

I :

~

HEC038

EC-138

TROUBLE DIAGNOSIS FOR NON-DETECTABLE Start Signal (Cont'd)

ITEMS


EC-S/SIG-01 Refer to EL-POWER.

30A

OJ -: -: ST

IGNITION SWITCH ~

7.5A

1261


FUSE BLOCK (JIB)

IN.41 SlY

CE106)

I

BIY

r.::b@ l/¥ll@)

SlY

I

SlY ~ STSW


ern

Refer to last page (Foldout paglil).

~~

tmI

W

101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118

HEC070

EC-139

•

TROUBLE DIAGNOSIS FOR NON-DETECTABLE Start Signal (Cont'd) DIAGNOSTIC

ITEMS

PROCEDURE

• STARTSIGNAL CKT. INSPECTION START

CLOSETHROTTLE.SHIFT TO P OR N RANGE. 2. TOUCH STARTAND START ENGINE IMMEDIATELY.

I

NEXT

MONITOR

*

NO FAIL

START SIGNAL CLSDTH/PSW AIR COND SIG PIN POSI SW

~

0

OFF ON OFF ON

OFF

IGN "ON"

__ RE_C_O_R_D_---,l

~I)~ID B II

ECM

INSPECTION END

00

IGN "START"

SEF111P

II

OK

00

II START MEF481B

m *

CHECK OVERALL FUNCTION. 1. Turn ignition switch "ON". 2. Perform "START SIGNAL CKT" in "FUNCTION TEST" mode with CONSULT. OR 2. Check "START SIGNAL" in "DATA MONITOR" mode with CONSULT.

ON

I

OR 1. Turn ignition switch to "START". 2. Check voltage between ECM terminal @ or @l and ground. Voltage: Ignition switch "START" Battery voltage Except above Approximately OV

CONNECTOR

34

NG

20

Check if 7.5A fuse is OK.

NG

Replace 7.5A fuse.

OK

@: 34 :


~Io II

ECM

ET

CONNECTOR

SEF231R

II

34 20

CHECK INPUT SIGNAL CIRCUIT. 1. Turn ignition switch "OFF". 2. Disconnect ECM harness connector and 7.5A fuse. 3. Check harness continuity between ECM terminal @ or @l and fuse block. Continuity should exist. If OK, check harness f<;>rshort. OK

@: @:



SEF232R


INSPECTION END

EC-140

NG


(ID,@ • Harness for open or short between ECM and fuse block If NG, repair harness or connectors.


ITEMS

Injector

EC-INJECT-01 Refer to EL-POWER. (b): @: @: @:

G

rh OFF

ST

'e-

IGNITION SWITCH

-:

~

ACC

-:

4J SIR

LHO models RHO models For Europe and Israel Except for Europe and Israle Detectable line for DTC Non-detectable line for DTC

•

I

~$

SIR m r=b

<:BID

SIR

t=

I~I

~

SIR

SiR

(EiOt)

<:BID

1;>-1>

.-----'.-----.----I I I

~. I

SIR

~m ernl4=Jl SIR

SIR

t

SIR IG7'A\

rn~ l!::i=Jl@ SIR

BIR

BIR 2

INJECTOR INJECTOR INJECTOR NO.1 NO.2 NO.3 2(EJ]) ~2rn rn fi1=i1 ~ rn

rn4=B

4=B Y/B

RIS

U

BIR

I

4JJ GIB

I

I

4=B LIB

(F21)

I

RIB

Y/B

G/B

LIB

rmru

In10iJ

11~31

11~21

INJ #2

INJ #3

INJ #4

INJ #1

INJECTOR NO.4

ECM (ECCS CONTROL MODULE) ill)

~------------------~ , ,

'FITm ~ :rnrnID@~@@: :

L

W

rn'3456I 'fil ernW

W

I

Refer to last page (Foldout page;J .

1&1 (EJ]),rn,@,~ @B

B

B

B

<:BID ~

:

~

I

~I ,1f.I)@ 87654 W

HEC039

EC-141

TROUBLE DIAGNOSIS FOR NON-DETECTABLE Injector (Cont'd)

ITEMS


EC-IN0ECT-01 -:


-:

Refer to EL-POWER.

IGNITION SWITCH

'e-

tEi7A\

AGG

ON

~

~

BIR

1r$1~ BIR <:BID

4J@ B/R@

I

e----e----e----I I I I

BIR

BIR

( ~ :1 No.1 INJECTOR

OCI NO.2 INJECTOR

~

@

L4J RIB

I

4J Y/B

I

m BIR

I4=!J

m BIR

INJECTOR No.3 @

GIB

I

L4J LIB

Y/B

GIB

LIB

~

11~71

11~41

h1~1

INJ

INJ

INJ

INJ

#2

#3

m

I

RIB #1

INJECTOR NO.4

#4

ECM (EGGS

CONTROL MODULE) (ED

~~

rmrn

W

101 102 103

104 105 106

107 108 109

110 111 112

113 114 115

116 117 118

(![~lifilCIT> ~ 3456 W ~

~,m,@,m B B B B


HEC071

EC-142

TROUBLE DIAGNOSIS FOR NON-DETECTABLE Injector (Cont'd) COMPONENT

ITEMS

DESCRIPTION

The fuel injector is a small, precise solenoid valve. When the ECM supplies a ground to the injector circuit, the coil in the injector is energized. The energized coil pulls the needle valve back and allows fuel to flow through the injector into the intake manifold. The amount of fuel injected depends upon the injection pulse duration. Pulse duration is the length of time the injector remains open. The ECM controls the injection pulse duration based on engine fuel needs. SEF596K

•

ACTIVE TEST.

DIAGNOSTIC

D

==

•

INSPECTION START

••• POWER BALANCE •••

===

PROCEDURE

=

MONITOR CMPS.RPM(REF) 737rpm MAS AIR/FL SEN 098V IACV-AAC/V 41%

CHECK OVERALL FUNCTION. 1. Start engine. ~ 2. Perform "POWER BALANCE" in "ACTIVE TEST" mode with CONSULT. 3. Make sure that each circuit produces a momentary engine speed drop.

OK

INSPECTION END

(F.I\

110Q]Q]~

DDDDc:J

MEF354F

OR

~7~

~

fff\ \)drJ At idle

/~~

~

Click

Ct. '~.+

--

/I

SEF730L

Fuel injector harness connector II

1. Start engine. 2. Listen to each injector operating sound. Clicking noise should be heard.

CHECK POWER SUPPLY. 1. Stop engine. 2. Disconnect injector harness connector. 3. Turn ignition switch "ON". 4. Check voltage between terminal @ and ground with CONSULT or tester. Voltage: Battery voltage

AEC872

AEC755

EC-143

NG


@,@or@, @ • Harness connectors

@,CillD • Harness for open or short between injector and ignition switch If NG, repair harness or connectors.

TROUBLE DIAGNOSIS FOR NON-DETECTABLE Injector (Cont'd) For Australia

r.ii3I

@

~ ~15 1='

=E=CM=Ef

.102 • 107.

CONNECTOR 104.

1

II

CHECK

109,


~io 'g

ECM

.101.110.

CONNECTOR

OUTPUT

SIGNAL

CIRCUIT.

NG

1. Turn ignition switch "OFF". 2. Disconnect ECM harness connector. 3. Check harness continuity between injector harness connector terminal QLand ECM terminals GID, @, @, CTID or 00, CIID, Gill, @). Continuity should exist. If OK, check harness for short.

(@:No.1 cylinder @:No.3cylinder @: No.2cylinder @: No.4cylinder

II

ITEMS

Check the following. • Harness for open or short between ECM and injector If NG, repair harness or connectors.

OK CHECK COMPONENT (Injector). Refer to "COMPONENT INSPECTION" below.

II

103.112 ,

NG

Replace injector.

OK


@ :NO.1cylinder @: No.3cylinder @:No.2cylinder

@:No.4cylinder


SEF148R


INSPECTION END

COMPONENT

INSPECTION

Injector 1. 2.

Disconnect injector harness connector. Check resistance between terminals as shown in the figure. Resistance: 10 - 140 [at 25°C (77°F)] If NG, replace injector.

AEC559

EC-144


ITEMS

Fuel Pump SYSTEM DESCRIPTION Engine speed Camshaft position sensor


Start signal Ignition switch

The ECM activates the fuel pump for several seconds after the ignition switch is turned on to improve engine startability. If the ECM receives a 180 signal from the camshaft position sensor, it knows that the engine is rotating, and causes the pump to perform. If the 180 signal is not received when the ignition switch is on, the engine stalls. The ECM stops pump operation and prevents battery discharging, thereby improving safety. The ECM does not directly drive the fuel pump. It controls the ON/OFF fuel pump relay, which in turn controls the fuel pump. 0

Condition Ignition switch is turned to ON. Engine running and cranking

Fuel pump relay

Fuel pump operation Operates for 5 seconds Operates

0

When engine is stopped

Stops in 1 second


Stops

COMPONENT

DESCRIPTION

A turbine type design fuel pump is used in the fuel tank.

AEC801

EC-145

•

TROUBLE DIAGNOSIS FOR NON-DETECTABLE Fuel Pump (Co nt' d)

ITEMS

EC-F/PUMP-01 IGNITION SWITCH ON or START FUSE BLOCK

15A

ITZJ

Refer to EL-POWER.

(JIB)

@: For Europe @: Except for Europe

*1 :

/IN•61

-:

I N.61

IT

BIL B/W

-:

@ 106 , @ 104 Detectable line for DTC Non-detectable line for DTC

n PUMP I~IFUEL U RELAY

Ibi=JI~CMD B/P

B/Y

aID@)

I

------

B/Y

~

I-

B/Y

------1 B/Y

m

lbi=Jl~ B 1

M

B/P IG":4rn r::b~

~

IIlJI CEID

lbi=Jl B

m~

I

lbi=Jl

B/P

wrn FPR

,-, B

I


B

-::!:-

em

L

FUEL TANK GAUGE UNIT

~

B/P

ACMD T

FUEL PUMP

~@

rnrn

~~

~~

W

B

~

w.g;

rQ,~ L!J.gj

GY

Refer to last page (Foldout

page) .

HEC040

EC-146

TROUBLE DIAGNOSIS FOR NON-DETECTABLE Fuel Pump (Conl'd)

ITEMS


EC-F/PUMP-01 IGNITION SWITCH ON or START

-:

Detectable line for oTC Non-detectable line for oTC

-: FUSE BLOCK

Refer to EL-POWER.

(J/B)

~

•

UN•51 I ~51

slL

B/W

II!'I~In (UEL

PUMP U RELAY

~1bi=Jl@) s/P s/Y

1

s/Y

-if] r

s/Y

-----1

(@ ([D

s/Y

ITil ~~ S 1

M

s/P~ r=:b~

~

I

FUEL TANK GAUGE UNIT ~

~

s

ITil~

S/P

~

m

,. B

FPR

I


L

PUMP

~

'Ill' CEID B/P

AQID T

FUEL

~(@

tmJ

W

@

~ GY

~~

\J.l.SI

rQ,~

W£.J

B

S

-:!:

..L..

(J311)

@ Refer to last page (Foldout page) .

101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118

HEC072

EC-147

TROUBLE DIAGNOSIS FOR NON-DETECTABLE Fuel Pump (Cont'd) DIAGNOSTIC

ITEMS

PROCEDURE

INSPECTION START

m CHECK OVERALL FUNCTION. 1. Turn ignition switch "ON".

AEC884

~

INSPECTION END

2. Pinch fuel feed hose with fingers. Fuel pressure pulsation should be felt on the fuel feed hose for 5 seconds after ignition switch is turned "ON".

Driver's dash lower

NG

Ii)

MEC266B

~

NG Check the following. CHECK POWER SUPPLY. --+ 1. Turn ignition switch "OFF". • 15A fuse • Harness for open or 2. Disconnect fuel pump relay from relay short between fuse and box. fuel pump relay 3. Turn ignition switch "ON". 4. Check voltage between terminals G), If NG, repair harness or connectors. @ and ground with CONSULTor tester. Voltage: Battery voltage

DISCONNECT

~ E~D

OK

[!] CHECK POWER GROUND CIRCUIT. 1. Turn ignition switch "OFF".

SEF479P

NG

--..


@,CID

2. Disconnect fuel pump harness connector. 3. Check harness continuity between terminal @ and body ground, terminal G) and fuel pump relay connector


@,@) • Harness for open or short between fuel pump and body ground • Harness for open or short between fuel

terminal CID. Continuity should exist. If OK, check harness for short.

pump and fuel pump relay If NG, repair harness or connectors .

OK

.

IE CHECK OUTPUT SIGNAL CIRCUIT. 1. Disconnect ECM harness connector.

Fuel pump harnessconnector

0111

~

MEC267BA

2. Check harness continuity between ECM terminal @, @ or @ and fuel pump relay connector terminal

@. Continuity should exist. If OK, check harness for short. OK

SEF4B7Q

EC-148

NG


CID,@ • Harness for open or short between ECM and fuel pump relay If NG, repair harness or connectors.

TROUBLE DIAGNOSIS FOR NON-DETECTABLE Fuel Pump (Cont'd)

~i5 II

8

@

Ej'coNNECTORII

ECM

ITEMS

CHECK

104 108

COMPONENT

1

NG

Replace fuel pump relay.

NG

Replace fuel pump.

(Fuel pump relay). Refer to "Component Inspection" below. OK 104

:

Except for Europe and Australia

106

:

For Europe SEF149R

8 : For Australia

Ii

• ACTIVE

D

TEST.

FUEL PUMP RELAY

ON

= = = MONITOR

--Orpm

CMPS.RPM(REFj

I ON

I_I

CHECK COMPONENT (Fuel pump). Refer to "COMPONENT INSPECTION" below.

OFF

•

OK

Di!?connect and reconnect harness connectors in the circuit. Then retest. Trouble is not fixed.

I


MEF309F

INSPECTION END

COMPONENT

=

INSPECTION

Fuel pump relay Check continuity between terminals CID and CID. Conditions 12V direct current supply between terminals CD and @ No current supply

Continuity

Yes No

If NG, replace relay. SEF511P

-Fuel pump 1. Disconnect fuel pump harness connector. 2. Check resistance between terminals CD and @. Resistance: 0.2 - 5.0n [at 25°C (77°F)] If NG, replace fuel pump.

EC-149


ITEMS

Idle Air Control Valve (IACV) Control (AAC) Valve

SYSTEM DESCRIPTION

Auxiliary Air

Engine speed



I Mass air flow sensor

I



~

I

Start signal

Ignition switch I

Throttle position


~

I

Inhibitor switch (A/T models)/ Neutral position switch (M/T models)




Cooling fan relay

Load switch'

Blower fan switch


!

IACV-AAC valve

I



I Battery

Park/Neutral position

~

Battery voltage

Vehicle speed

Cooling fan operation

Electrical load

Blower fan operation

': Rear window defogger switch and headlamp switch.

This system automatically controls engine idle speed to a specified level. Idle speed is controlled through fine adjustment of the amount of air which bypasses the throttle valve via IACV-AAC valve. The IACV-AAC valve opens and closes (except for Europe and Israel), or repeats ON/OFF operation (for Europe and Israel), according to the signal sent from the ECM. The camshaft position sensor detects the actual engine speed and sends a signal to the ECM. The ECM then controls the IACV-AAC valve so that engine speed coincides with the target value memorized in ECM. The target engine speed is the lowest speed at which the engine can operate steadily. The optimum value stored in the ECM is determined by taking into consideration various engine conditions, such as during warm up, deceleration, and engine load (air conditioner, power steering and cooling fan operation).

COMPONENT

DESCRIPTION

IACV-AAC valve -

Except for Europe and Israel

The IACV-AAC valve is moved by open and close signals from the ECM. When the open signal is sent to the valve, the amount of air that will flow through the valve increases. The more air that flows through the valve, the higher the idle speed. When the close signal is sent to the valve. the amount of air decreases.

EC-150

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS ~ Idle Air Control Valve (IACV) - Auxiliary Air Control (AAC) Valve (Cont'd) IACV-AAC valve -


The IACV-AAC valve is moved by ON/OFF pulses from the ECM. The longer the ON pulse, the greater the amount of air that will flow through the valve. The more air that flows through the valve, the higher the idle speed.

•

EC-151

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS [EJ Idle Air Control Valve (IACV) - Auxiliary Air Control (AAC) Valve (Cont'd)

EC-AAC/V-01

10A

1251 IIN~91

FUSE

Refer

to EL-POWER.

BLOCK (JIB)

~

@: For Europe and Israel @: Except for @

BR I

~-------~ BR

-:


-:

BR

~T

T@

@~

~@ BR

BR

m

IACVAAC VALVE

~

flQ): @

BR

BR

3

IACVAAC VALVE

QID:@

~1!4J

~

SB

SB

Ii1t3n I5C

PU/W

5B

PU/W

5B

Ii1t3nffiru ISC

ISC

-C

-0


(IT)


rn' 11fi] @ 3456

W

(ill II~ 4567B

@ W

~rn

@ BR

~@ ~BR

HEC043

EC-152

TROUBLE DIAGNOSIS FOR NO~-DETECTABLE ITEMS []K] Idle Air Control Valve (IACV) - Auxiliary Air Control (AAC) Valve (Cont'd) GA 16DE for Australia

EC-AAC/V-01

FUSE BLOCK (JIB)

lOA

1251

Refer

to EL-POWER.

•

~

IIN;91 BR

.I

_.

Detectable

line

for DTC -:

BR

Non-detectable line for DTC

IrfJl@

em

BR

I

BR 3

IACVAAC

VALVE

CEID

4=Uli4=ll

~

PU/W

58

PU/W

58

~~ ISC

ISC

-c

-0


em

fIjl I I~ (IT) 3456

W


~CEID ~8R

101 102 103 104 105 106 107 lOB 109 110 111 112 113 114 115 116 117 l1B

HEC075

EC-153

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS ffiJ Idle Air Control Valve (IACV) - Auxiliary Air Control (AAC) Valve (Cont'd) DIAGNOSTIC

PROCEDURE

INSPECTION START

CHECK OVERALL FUNCTION. 1. Start engine and warm it up sufficiently. 2. Check idle speed. If NG, adjust idle speed. ~ 3.• Perform "AAC VALVE ~ ADJ" or "IACV-AACIV ADJ" in "WORK SUPPORT" mode with CONSULT. • Disconnect throttle position sensor harness connector. 4. Make sure that idle speed drops.

~

SEF142NC

Ii)

~i5~i5 dfu

CillffuID

CHECK POWER SUPPLY. 1. Stop engine. 2. Disconnect IACV-AAC valve harness connector. 3. Turn ignition switch "ON". 4. Check voltage between terminal @ or G) and ground. Voltage: Battery voltage

OK

NG

CD :

For Europe and Israel for Europe and Israel

SEF233R

• IACV-AACNSYSTEM. LET ENGINEIDLE THEN TOUCHSTART (AiC SW-UGHT SW OFF)

OR

~

I

I

MEF176E

o

M ~

3. Perform "IACV-AACIV OPENING" in "ACTIVE TEST" mode with CONSULT. OR 2. Disconnect ECM harness connectar. 3. Check harness continuity between ECM terminal (ill) or @ and terminal @, ECM terminal or @ and terminal @. Continuity should exist. If OK, check harness for short.

GID

IACV-AACN 34% OPENING MONITOR CMPS-RPM(REF) 712rpm MASAIRIFLSE 1.13V COOLANTEMPtS 92°C

==========

(ij\

(F.I\

!:::=====mul=== NEXT" START

• ACTIVETEST.

CHECK OUTPUT SIGNAL CIRCUIT. 1. Turn ignition switch "OFF". 2. Reconnect IACV-AAC valve ~ harness connector and then start engine. 3. Perform "IACV-AACIV SYSTEM" in "FUNCTION TEST" mode with CONSULT.

==========

OK @

illU--illU

~[]fl[OOWN][Qill SEF484Q

EC-154


QD,@orQD, @ • 10A fuse • Harness for open or short between IACV-AAC valve and fuse If NG, repair harness or connectors.

OK

@ : Except

INSPECTION END

NG


TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS [ill Idle Air Control Valve (IACV) - Auxiliary Air Control (AAC) Valve (Cont'd) [!J For Europe and Israel

~io 1=1

=E=CM=19'CONNECTORII

~io cffu

@

CHECK COMPONENT (IACV-AAC valve). Refer to "COMPONENT INSPECTION" below.

113

NG

Replace IACV-AAC valve.

OK


~io

•


II


SEF150R

COMPONENT

INSPECTION

IACV-AAC valve -


Disconnect IACV-AAC valve harness connector. • Check resistance between terminals @ and @. Resistance: 50 - 1000 [at 25°C (7rF)]

AEC845

IACV-AAC VALVE -


•

Check IACV-AAC valve resistance. Resistance: Approximately 100 [at 25°C (77°F))

•

Check plunger for seizing or sticking.

EC-155

CID, CID and


ITEMS

Cooling Fan Control SYSTEM DESCRIPTION Vehicle speed


EGM Engine coolant temperature

Air conditioner

(EGGS control module)


sensor

Air conditioner

switch

Gooling fan relay(s)

"ON" signal

MIT MODELS The ECM controls the cooling fan corresponding to the vehicle speed, engine coolant temperature, air conditioner ON signal. The control system has 2-step control [ON/OFF].

and

Operation For Europe with daytime light system E~ ::J

Air conditioner switch Is "OFF".

0

~Z; 2io E ~ ~

~ iL

/,

:v () 0.0

E

~

95 (203)

95 (203)

o Gl

c

w

/'/"

!~~ 11'l1/1~~~

100 (212)

'0 o

c '0>

Air conditioner switch Is "ON".

r

r

20

80

.~

(12) (50) Vehicle speed km/h (MPH) D :Cooling fans do not operate.

20 80 (12) (50) Vehicle speed km/h (MPH)

ill

EZ2l : Cooling

fans operate. SEF902P

For Europe without daytime light system and Australia Gl_

2~ ., :v0.0()

E

~ ~

'0 o o

Air conditioner switch Is "OFF",

Air conditioner switch Is "ON",

105 (221) 95 (203)

100 (212)

91 (196)

Gl

c '0> c

w

20 (12)

80 (50)

Vehicle speed km/h (MPH)

D :Cooling

20

80

(12)

(50)

Vehicle speed km/h (MPH)

fans do not operate.

EC-156

~

: Cooling fans operate.

SEF649MB

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS Cooling Fan Control (Cont'd) AIT MODELS The ECM controls the cooling fan corresponding to thevehicle speed, engine coolant temperature, air conditioner ON signal. The control system has 3-step control [HIGH/LOW/OFF],

and

Operation For Europe with daytime light system Air conditioner switch Is "OFF".

~ iL ::J

e;-

105 (221)


0

105 (221)

~o

100 (212)

C

95 (203)

E

~

100 (212)

C

95 (203)

'0 o

•

'0 o

()

()

Q)

Q)

c '0> c

i

~

~ 00 00 (12) (50) tD (12) (50) UJ Vehicle speed km/h (MPH) Vehicle speed km/h (MPH) Cooling fans do not operate. ~: Cooling fans operate at "Low" speed. ~: Cooling fans operate at "High" speed.

o:

SEF904P

For Europe without daytime

light system and Australia


~~ ::J

~

'0 o () Q)

c

Air conditioner switch is "ON",

0

105 (221)

(;j.... 0 105 (221) ~o

100 (212)

E 2

100 (212)

95 (203)

C

95 (203)

91 (196)

'0 o ()

Q)

i

~

~ 00 00 (12) (50) tD (12) (50) UJ Vehicle speed km/h (MPH) Vehicle speed km/h (MPH) Cooling fans do not operate. l22a: Cooling fans operate at "Low" speed. ~: Cooling fans operate at "High" speed. '0> c

o:

SEF905P

EC-157

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS Cooling Fan Control (Cont'd)

EC-COOL/F-01 IGNITION SWITCH ON or START

BATTERY (Via fusible link)

FUSE BLOCK (JIB) (E106)

10A

1251

(1):

(8):

Refer to EL-POWER.

30A

@:

IT]

IQ~OI

@:

LHD models RHO models LHD AIT models for Europe without daytime light system Except @

GY

t:} 9-I--@------------I!' '$1 I -----0--<\])----------

BR

GY

BR

SR

Next

page

~

GY

nU

FAN COOLING RELAY-1

lki=U~rn>

LG/R

I

00 L~

G/B

' --------0--<1»------..

1I1¥J1
(E10t)

G~B

~ ~

L

~

"t

M

0

~

Iml '-i-'@

~

M

I------~-= -@> -I9>}

-~@----------_

•.. LG

RFRL

RFRH

ldoll

B

LG

-:


-:

Ne x t page

E



+ 1

@:@

B

I -----------CED

2

COOLING FAN MOTOR-2

ll4JI

B

LG/R

m

m COOLING FAN MOTOR-1

m:@

I

LG/R~g r:::!::, 'l:!::!3'

page

G!B

rFh

I~I LG/R

-i9> Next

T---

1$ ~

G/B

@

L

@) W

5

@

@~ GY ,

GY

HEC044

EC-158


Preceding {: page

::

EC-COOL/F-02

~L:..

@: LHD A/T models for Europe without daytime light system @: Except@ -: Detectable line for DTC -: Non-detectable line for DTC

_

<&SR~ SR

GY LG/S

II!II~II:!

COOLING ~~~AY-2

~

rI I4J

•

~

IGCB_ -j--T=====I,

rn:@

~

(E10f)

~

n l!F Ii

CHIDLG

GIS

t

I

(M49)

@

IcP~- ~$I :~~~ GIS

G/Y

m

Hi

COOLING

(+)

FAN

La

MOTOR-1 (E303): /LA'

6

Hi

LG

G/Y

GIS

La (+)

II : II

GIS

IcP~- t~1 :~~~

rt=n

LG

G/Y

H

~ LG/B

(-)

~

~

IYJr - -1$1(E3Ot) ~

.!_! LG/B

rm m

La (+)

S

Hi

COOLING

(+)

FAN

MOTOR-2 Hi

L

H

~

(~

~ B

G/Y

~:

/i'"A'..

~

~

LG/B

B

iCiJr- i$1

LG/B

B

(E302)

I ~

----0------0-'. B -!~

B

-!(E51)


lmf

2

57

3 6

rn BR

~

\mJ

@ GY ,

@Z) GY ,

(E303)

GY ,

(E304)

GY

HEC045

EC-159

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS Cooling Fan Control (Cant' d) GA16DE for Australia

EC-COOL/F-01 BATTERY (Via fusible link)

IGNITION SWITCH ON or START

@: AIT models 10A

1251

Refer

FUSE BLOCK (JIB) (Ei06)

IQ~OI

to EL-POWER.

30A

o

M/T modeIs Models with air conditioner

GY

BR

I O--cF)---------

-

<}- I-(A)--------------

II!I~ I BR

:

::t}

Next page

GY

n

u

FAN COOLING

RELAY-1

~~~

I ..'--------0---<:£)-------

LG/R G/B

2rL CHID

(~II (il G/B

LG1/R

G/B

FAN COOLING MOTOR-1 ~:
M

LG/R

U4=!J

Iml (M49)

+@

LG1/R

1r@1 RFRH

I

B

I

~ :

104 105 106

113 114 115

B LG

!:} V

Next

page

-:

Oetectab Ie line for DTC Non-detectable line for OTC

<:ED Refer to last page (Foldout page) .

clli:>

5

110 111 112 116 117 118

_.


L

101 102 103

~:

U4=!J
LG

rIT4iJ

107 108 109

FAN COOLING MOTOR-2

."-...-:(£))01-----------

RFRL

1

M

B

~ + 2

page

~

Utili (Ei0!)

------------

Next

~

'-----1

LG/R

LG/R

G/B

GY ,

,

@ (EIOn

~~ GY

~

HEC076

EC-160

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS Cooling Fan Control (Cont'd) GA 16DE for Australia

EC-COOL/F-02

Preceding page

{:

::

~A

_• @: @: @:

~SR~ SR

GY

LG/S

II!I~nII~n I

COOLING FAN

U

RELAY-2

@: @

I!4=Jl Ibi=Jl LG

G/Y

-:

U

4J

-:

8

I L

I!I

~r=b, LG

CBID

Models with air conditioner Detectable line for DTC Non-detectable line for DTC

,

I

_

A/T models MIT models

1- -----

It

GIS

G/Y

mm

LG

@ r=b, @1'4J1 LG

La

Hi

(+)

(+)

COOLING FAN MOTOR-1

COOLING FAN MOTOR-2

~:<:D

~:<:D @

<€}-

LG

A

Preceding page

S

-
.....

-

A

A

A

0

0

0

,-, 1

S

8

-!- ~
if 57 36

ID

~~,~ 3 4 GY

SR

CHID , (ElOO GY

HEeD??

EC-161

•

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS Cooling Fan Control (Cant' d)

m

DIAGNOSTIC

With air conditioner

PROCEDURE

Coolingfan INSPECTION START

CHECK COOLING FAN LOW SPEED OPERATION.

I With air

conditioner 1. Start engine.

Without air conditioner Coolingfan

I

conditioner 1. Start engine.

Coolingfan

~

~

~~ ~ ~

Engine coolant

eN

~ ~

I PROCEDURE A I.)

I

2. Keep engine speed at about 2,000 rpm until engine is warmed up sufficiently. 3. Make sure that cooling fan begins to operate at low speed during warmup.

~a~~:;:t:a::;'~~' Q

OK

lDoo

150n Resistor

SEF492Q

Check cooling fan low speed control circuit. (Go to

2. Set temperature lever at full cold position. 3. Turn air conditioner switch "ON". 4. Turn blower fan switch "ON". 5. Run engine at idle for a few minutes with air conditioner operating. 6. Make sure that cooling fan operates at low speed.

I Without air MEC340B

NG

CHECK COOLING FAN HIGH SPEED OPERATION. 1. Turn air conditioner switch "OFF". 2. Turn blower fan switch "OFF". (Steps 1) and 2) are only performed for models with air conditioner.) 3. Stop engine. 4. Disconnect engine coolant temperature sensor harness connector. 5. Connect 1500 resistor to engine coolant temperature sensor. harness connector. 6. Restart engine and make sure that cooling fan operates at high speed. OK INSPECTION END

EC-162

NG

Check cooling fan high speed control circuit. (Go to PROCEDURE B

I

I.)

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS Cooling Fan Control (Cont'd) DIAGNOSTIC

PROCEDURE

PROCEDURE A

INSPECTIONSTART

CHECK POWER SUPPLY. SEF193R

NG

1. Stop engine. 2. Disconnect cooling fan relay-1. 3. Turn ignition switch "ON". 4. Check voltage between terminals G), @ and ground. Voltage: Battery voltage OK

Check the following. • 10A fuse • 30A fusible link • Harness for open or short between cooling fan relay-1 and fuse • Harness for open or short between cooling fan relay-1 and battery If NG, repair harness or connectors.

MEC342B

CHECK GROUND CIRCUIT. 1. Turn ignition switch "OFF". 2. Disconnect cooling fan motor-1 harness connector and cooling fan motor-2 harness connector. 3. Check harness continuity between terminal CD and terminal @. Continuity should exist. If OK, check harness for short. 4. Check harness continuity between terminal @ and body ground or terminal @ and body

I!l

Ii

ground. Continuity should exist. If OK, check harness for short. OK

@

EC-163

NG


•

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS Cooling Fan Control (Cont'd) @

1

Ii

CHECK OUTPUT SIGNAL CIRCUIT. 1. Disconnect ECM harness connector. 2. Check harness continuity between ECM terminal @ or @ and terminal @. Continuity should exist.

NG

~

aD,@ • Harness connectors

@,@D • Harness for open or short between cooling Ian relay-1 and ECM If NG, repair harness or connectors.

OK

CHECK COMPONENT (Cooling fan relay-1). Refer to "COMPONENT INSPECTION". (See page EC-167.)


NG

---+

Replace cooling fan relay.

OK

[!1

* *

1 : 2-step control 2 : 3-step control

models models

SEF195R

CHECK COMPONENTS (Cooling fan motors-1 and -2). 1. Reconnect cooling fan relay-1, cooling fan motor harness connectors and ECM harness connector. 2. Turn ignition switch "ON". 3. Perform "COOLING FAN CIRCUIT" in "FUNCTION TEST" mode with CONSULT. OR 3. Perform "COOLING FAN" in "ACTIVE TEST" mode with CONSULT. OR Refer to " COMPONENT INSPECTION". (See page EC-167.)

00

*

*

1 : 2-step control

models

2 : 3-step control

models

Ii

00 SEF175R

@

~i5 II

ECONNEc@1

ECM 9

OK

14

Disconnect and reconnect harness connectors in the circuit. Then. retest. Trouble is not fixed.

@:

For Australia

(2):

Except lor Australia

SEF234R

• COOLING FAN CIRCUIT.

Check ECM pin terminals for damage or the connection 01 ECM harness connector. Reconnect ECM harness connector and retest.

DOES INSPECTION END

COOLING FAN ROTATE AND STOP EVERY 3 SECONDS ? NEXT

II

NO

11

YES

I MEF311F

EC-164

NG

---+

Replace cooling fan motors.

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS Cooling Fan Control (Cont'd) • ACTIVE TEST. COOLING FAN

o

PROCEDURE B

OFF INSPECTIONSTART

= = = MONITOR = = = COOLAN TEMP/S

88°C

1:1 CHECK POWER SUPPLY. 1. Stop engine. 2. Disconnect cooling fan relay-2. 3. Turn ignition switch "ON". 4. Check voltage between terminals G), @ and ground. Voltage: Battery voltage

.

NG

----..

Check the following. • Harness for open or short between cooling fan relay-2 and fuse • Harness for open or short between cooling fan relay-2 and fusible link

OK

If NG, repair harness or

connectors.

CHECK GROUND CIRCUIT. 1. Turn ignition switch "OFF". 2. Disconnect cooling fan motor-1 harness connector and cooling fan motor-2 harness connector. 3. Check harness continuity between terminal @ and terminal @. Continuity should exist. If OK, check harness for short. 4. Check harness continuity between terminal @ and terminal @, terminal (!) and body


o

1:1

~i5 3

7 5 ~2

NG ----..

1

II

ground. Continuity should exist. If OK, check harness for short.

MEC346B

OK

II CHECK OUTPUT SIGNAL CIRCUIT. 1. Disconnect ECM harness connector. 2. Check harness continuity between ECM terminal @ or @l and terminal @. Continuity should exist. If OK, check harness for short. OK

EC-165

NG

----..


@,@ • Harness connectors

@,@D • Harness for open or short between ECM and cooling fan relay-2 If NG, repair harness or connectors.

•


o

@

~i5

CHECK COMPONENT (Cooling fan relay-2). Refer to "COMPONENT INSPECTION" on next page.

~-

m=m

NG


NG


OK

SEF226R

~

~i5

IDlsco~

I...s1

:~

0

~

rn=m

II CHECK COMPONENTS (Cooling fan motors-1 and -2).

~ \J!}

QW

1. Rec~nnect cooling fan relay-2, cooling fan motor harness connectors, engine coolant temperature sensor harness connector and ECM harness connector. 2. Turn ignition switch "ON". 3. Perform "COOLING FAN CIRCUIT" in "FUNCTION TEST" mode with CONSULT.

SEF227R

OR

~i5 II

~i5 00 Jm1 3

El'CONNECTORII

ECM 13

7 5

2

10

1

~ ~

3. Perform "COOLING FAN" in "ACTIVE TEST" mode with CONSULT. OR Refer to " COMPONENT INSPECTION" on next page. OK

@: @:

II

For Australia SEF196R


Trouble is not fixed .

• COOLING FAN CIRCUIT. DOES


COOLING FAN ROTATE AND STOP EVERY 3 SECONDS

NEXT

II


II

NO

II

7

YES

I

INSPECTION END

MEF311F

• ACTIVE TEST. COOLING FAN

== =

MONITOR COOLAN TEMPjS

CJ5_N_I~

OFF

--ggoC

MEF312F

EC-166

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS Cooling Fan Control (Cant' d) COMPONENT

=

INSPECTION

Cooling fan relay-1 Check continuity

between terminals

@ and

CID.

Conditions

SEF511P

Continuity

12V direct current supply between terminals G) and @

Yes

No current supply

No

If NG, replace relay.

Cooling fan relay-2 Check continuity

between terminals

@ and

CID, @

Conditions

and (f).

Continuity


Yes

No current supply

No

If NG, replace relay. SEC2028

Cooling fan motors-1 and -2 MIl models: 1. Disconnect cooling fan motor harness connectors. 2. Supply cooling fan motor terminals with battery voltage and check operation. Terminals (EB)

SEF499QA

Cooling fan motor

Cooling fan motor should operate. If NG, replace cooling fan motor.

EC-167

(8)

•

@]

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS Cooling Fan Control (Cant' d)

~

IDISCD~

~

c'J

AfT models for Australia and LHD AfT models for Europe without daytime light system

1. Disconnect cooling fan motor harness connectors. 2. Supply cooling fan motor terminals with battery voltage and check operation. Terminals Speed

SEF500QA

(EB)

(8)

Cooling fan motor-1

Low

G)

@

High

@

@

Cooling fan motor-2

Low

G)

@

High

@

@

Cooling fan motor should operate.

If NG, replace cooling fan motor.

EC-168


ITEMS

Power Steering Oil Pressure Switch

EC-PST/SW-01 ECM (ECCS CONTROL MODULE)

(0: LHD models @: RHO models @: LHD models with ABS or dual air bag or rear door power window
em

PWST

1~31 PU/W

I

PU/W

14J1
PU/W

+~--------~'-@--------I I

PU/W

PU/W

1$11 (El0n CHID

1c}J1~(8113)

PU/W

PU/W

rh

rh ON

POWER STEERING OIL PRESSURE SWITCH @:@

ON OFF.....--

~

POWER STEERING OIL PRESSURE SWITCH

~:

ON OFF.....--

~ B

B

~

m

~ B

B

+

J

O~

I ,.

,. B

B

~

~ @~

(E51)

,..Q...

~ W

UJ.g)

POWER STEERING OIL PRESSURE SWITCH (8102): @

B

~

@ ~ (8102) GY , GY , GY

ffiIl' I lfij 45678

Refer to last page (Foldout page) . (8113) W

CHID , (El0n

HEC046

EC-169

•

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS @J Power Steering Oil Pressure Switch (Cont'd) GA16DE for Australia

EC-PST/SW-01 ECM (ECCS CONTROL MODULE)

(IT)

PWST 12•51

-: -:


PU/W

I

PU/W Iml@

=r~

PU/W

I

PU/W

1$11
PU/W

I ON OFF'---

POWER STEERING OIL PRESSURE SWITCH @

~ B

I ,-, B

B

..L.

..L.

do

~1)


~@ W,g)

GY

101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118

HEC078

EC.170

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS @[] Power Steering Oil Pressure Switch (Cont'd) Power steering oil ___ pressure switch

-

~

to

COMPONENT

DESCRIPTION

The power steering oil pressure switch is attached to the power steering high-pressure tube and detects a power steering load. When a power steering load is detected, it signals the ECM. The ECM adjusts the IACV-AAC valve to increase the idle speed and adjust for the increased load.

DIAGNOSTIC

•

PROCEDURE

• PW/ST SIGNAL CIRCUIT.

INSPECTION START HOLD STEERING WHEEL IN A FULL

LOCKED

POSITION

CHECK OVERALL FUNCTION.

THEN

fiii\

TOUCH START

II

NEXT

~

START MEF023E

1. Turn ignition switch "ON". 2. Perform "PW/ST SIGNAL CIRCUIT" in "FUNCTION TEST" mode with CONSULT. OR

(F.i\

* MONITOR * NO FAIL 0 PW/ST SIGNAL

~

OFF

CONSULT. Steering is in neutral position: OFF Steering is turned: ON

RECORD

OR SEF591I

~i)~ II

Ef

ECM 43

CONNECTOR

1. Start engine. 2. Check "PW/ST SIGNAL" in "DATA MONITOR" mode with

1. Start engine. 2. Check voltage between ECM terminal @ or @ and ground. Voltage: When steering wheel is turned quickly. Approximately OV Except above Approximately 5V

II

25

NG

@):

For Australia

@:


SEF235R

EC-171

OK

INSPECTION END

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS @K] Power Steering Oil Pressure Switch (Cont'd) @

1

AEC760

~i5 II

Ef

ECM 43

CONNECTOR

II

~i5 c:ITb

25


CHECK GROUND CIRCUIT. 1. Turn ignition switch "OFF". 2. Disconnect power steering oil pressure switch harness connector. 3. Check harness continuity between terminal @ and engine ground. Continuity should exist. If OK, check harness for short.

[i CHECK INPUT SIGNAL CIRCUIT. 1. Disconnect ECM harness connector. 2. Check harness continuity between ECM terminal @ or @ and terminal

NG

......---..

aD,

G).

For Australia

OK


SEF176R

CHECK COMPONENT (Power steering oil pressure switch). Refer to "COMPONENT INSPECTION" below.

(MID

• Harness connectors @,@or@,


@: @:

Check the following . • Harness connectors

NG --...

Replace power steering oil pressure switch.

OK Disconnect and reconnect harness connectors in the circuit. Then retest. Trouble is not fixed. Check ECM pin terminals for damage or the connection of ECM harness connector. Reconnect ECM harness connector and retest.

INSPECTION END

COMPONENT

[At

IV ID

INSPECTION

Power steering oil pressure switch 1. Disconnect power steering oil pressure switch harness connector then start engine. 2. Check continuity between terminals
~

Steering wheel is not being turned AEC762

Continuity Yes No

If NG, replace power steering oil pressure switch.

EC-172

TROUBLE DIAGNOSIS FOR NON-DETECTABLE Park/Neutral

Position Switch

EC-PNP/SW-01

reM NEUT

I~I

(ECCS CONTROL MODULE)

CED

:

G/OR

I¥J'@

<:A>:

G/OR

@: @: @:

:

~

I

G/OR

1$1 ~~~1) 1$1~~~1)

-:

G/OR

*_.I _T O--
t

•

, @2 , @6


-: ~(E201)

G/DR ~

G/OR ---

G/DR

I[b (E23)

• ..

=r='@QD G/DR

m

LHD models RHO mode1s A/T mode1s M/T models For Europe and Israel Except @ A/T models except for Europe and Israel Except @

@: *1"'@1 *2"'@1

G/OR

G/OR

ITEMS

N

...-

0

INHIBITOR 1 SWITCH

W>: <:A>

2

l4=Jl B

NEUTRAL

POSITION SWITCH OTHER - ~

@:

4J B

A (E20f) ~

I--------(H)-O-

B

~

B

,. B

~

B

~

@rn Refer to last page (Foldout page) . ~ ~

(E20t) B

~

(E222)

~

GY

HEC047

EC-173

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS Park/Neutral Position Switch (Cont'd) GA 16DE for Australia

EC-PNP/SW-01 ECM

NEUT

(ECCS CONTROL MODULE) (IT)

ill : AIT models @: MIT models Detectable line -: fa/"'DTC -: Non-detectable line for DTC

12•21

G/OR

I

G/OR

1$11 @ CEID G/OR

1$1 ~
G/OR

I

~@D

O-
t

G/OR

-ca

G/OR ---

G/OR

[b,~ =r@D

R

G/OR

I

OTHER --

N--D

2

ill

~:

l4=Jl B

G/OR

m

• INHIBITOR .. 1 SWITCH

P __

I

Qj:

NEUTRAL POSITION SWITCH (E220): @

B

B

--O--'-, B ~ ~

B ~ @D Refer to last page (Foldout page) .

~

(222)

~

GY

fTIffiI
CHID ,(E10t)

101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118

HEC079

EC-174

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS Park/Neutral Position Switch (Co nt' d)

@J

When the gear position is "P" (A/T models only) or "N", parkl neutral position switch is "ON", ECM detects the park/neutral position when continuity with ground exists,

DIAGNOSTIC •

•

PROCEDURE

NEUTRAL SW CIRCUIT.

Neutral position switch

SHIFT OUT OF

NIP-RANGE

INSPECTION START THEN TOUCH START

__

II

START SEF206L

i,MONITOR

*NO

START SIGNAL CLOSED TH/POS /lIR COND SIG NEUT POSI SW

FAIL

0

CHECK OVERALL FUNCTION. (ijJ\ 1. Turn ignition switch "ON". ~ 2. Perform "NEUTRAL SW CIRCUIT" or "NEUTRAL POSI SW CKT" in "FUNCTION TEST" mode with CONSULT.

rF.I\

ON ON OFF ON

~

OK

INSPECTION END

OR

2. Check "NEUTRAL SW" or "NEUT POSI SW" signal in "DATA MONITOR" mode with CONSULT. Neutral position: ON Except above: OFF OR

[

fff\

RECORD

~ MEF983E

~

CONNECT

~

JA

L41E)~~ 1=1

=E=CM~ECONNECTOR!' 35

1. Set shift lever to the neutral position. 2. Disconnect ECM harness connector. 3. Check harness continuity between ECM terminal @ or @ and body ground. Continuity should exist. If OK, check harness for short.

22

NG

Turn ignition switch "OFF".

@: @:

Fo' Australia Except for Australia

SEF236R

r:'I

.;, CHECK GROUND CIRCUIT. 1. Disconnect neutral position switch harness connector. 2. Check harness continuity between terminal @ and body ground. Continuity should exist. If OK, check harness for short. OK

SEF5020

EC-175

NG


@,(@) • Harness for open or short between neutral position switch and body ground If NG, repair harness or connectors.

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS Park/Neutral Position Switch (Cont'd)

~io Il

ECM 35

@:

E[coNNECTORII

~iV

@

m

Disconnect ECM harness connector.

22

For Australia

35 : Except for Australia

SEF177R

CHECK INPUT SIGNAL CIRCUIT. 1. Check harness continuity between ECM terminal @ or @ and terminal

NG


@,@

CD.




@,@!) @),CmD

OK

CHECK COMPONENT (Neutral position switch). Refer to "Check of Position Switch" of "ON-VEHICLE SERVICE" in MT section. OK Disconnect and reconnect harness connectors in the circuit. Then retest. Trouble is not fixed. Check ECM pin terminals for damage or the connection of ECM harness connector. Reconnect ECM harness connector and retest.

INSPECTION END

EC-176

• Harness for open or short between ECM and neutral position switch " NG, repair harness or connectors. NG

Replace neutral position switch.

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS Park/Neutral Position Switch (Cont'd) Inhibitor switch

• PARKJNEUTPOSI SW CKT • SHIFT

INSPECTION START

OUT OF NIP-POSITION THEN

1!1

TOUCH START

CHECK OVERALL FUNCTION. 1. Turn ignition switch "ON". ~ 2. Perform "NEUTRAL POSI SW CKT" in "FUNCTION TEST" mode with CONSULT.

OK

INSPECTION END

(ij\

I NEXT II__

I

ST:_A_RT __

MEC7318

~rMONITOR

~NO

SlART SIGNAL CLOSED TH/POS '!\IR COND SIG NEUT POSI SW

FAIL

•

OR

0

rF.I\ ~

ON ON OFF ON

2. Check "NEUTRAL SW" or "NEUT POSI SW" signal in "DATA MONITOR" mode with CONSULT. "N" or "P": ON Except above: OFF OR

[

RECORD MEF983E

~i5@a G ...._

II

19'

ECM

CD

CONNECTOR

TI

35 22

~~ @ : @ :


1. Shift selector lever to "P" position. 2. Disconnect ECM harness connector. 3. Check harness continuity between ECM terminal @ or @ and body ground. Continuity should exist. If OK, check harness for short 4. Shift selector lever to "N" position. 5. Check harness continuity between ECM terminal @ or @ and body ground. Continuity should exist. If OK, check harness for short

SEF178R

NG

~io@a

Turn ignition switch "OFF"

6iB SEF228R

CHECK GROUND CIRCUIT. 1. Disconnect inhibitor switch harness connector. 2. Check harness continuity between terminal G) and body ground. Continuity should exist. If OK, check harness for short. OK

Disconnect ECM harness connector.

EC-177

NG


@D,@]) • Harness for open or short between inhibitor switch and body ground If NG, repair harness or connectors.


iii

~i5 ~i5 II

ECM 35

@: @:

E

CONNECTOR

II

Effij

CHECK INPUT SIGNAL CIRCUIT. 1. Check harness continuity between ECM terminal @ or @ and terminal

22


iii NG


QD,@)

@.




@,@D @),@D

OK

SEF237R

CHECK COMPONENT (Inhibitor switch). Refer to "Electrical Components Inspection" of "TROUBLE DIAGNOSES" in AT section. OK Disconnect and reconnect harness connectors in the circuit. Then retest. Trouble is not fixed. Check ECMpin terminals for damage or the connection of ECM harness connector. Reconnect ECM harness connector and retest.

INSPECTION END

EC-178

• Harness for open or short between ECM and inhibitor switch If NG, repair harness or connectors. NG

Replace inhibitor switch.


ITEMS

EVAP Canister Purge Control Solenoid Valve GA16DE MIT models except for Europe, Israel and Australia

SYSTEM DESCRIPTION Camshaft position sensor

Engine speed






Throttle position

Ignition switch

Start signal


Vehicle speed


This system cuts and controls the port vacuum applied to the EVAP canister purge control solenoid valve to suit engine operating conditions. This cut-and-control operation is accomplished through the ECM. When the ECM detects any of the following conditions, current flows through the solenoid valve in the EVAP canister purge control solenoid valve control vacuum line.

Vacuum signal

solenoid valve

This causes the port vacuum to be discharged into the atmosphere so that the EVAP canister purge line remains closed. • Engine starting • Closed throttle position • Low and high engine coolant temperature • During deceleration • Engine stopped • Vehicle speed: below 10 km/h (6 MPH) • Mass air flow sensor malfunction

COMPONENT

W>

EVAP canister purge control

DESCRIPTION

The EVAP canister purge control solenoid valve responds to signals from the ECM. When the ECM sends an ON (ground) signal, the coil in the solenoid valve is energized. A plunger will then move to cut the vacuum signal (from the intake manifc,ld to the EVAP canister purge control solenoid valve). When the ECM sends an OFF signal, the vacuum signal passes through the solenoid valve. The signal then reaches the EVAP canister purge control solenoid valve.

SEF240PG

EC-179

•

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS ~ EVAP Canister Purge Control Solenoid Valve (Cont'd) MIl models except for Europe and Israel

EC-PGC/V-01 IGNITION SWITCH ON or START 10A

1251

FUSE BLOCK

Refer to EL-POWER.

(JIB)

~

_. -:


BR

IlIDl
I

BR

OCIEVAP PURGE CANISTER CONTROL

SOLENOID VALVE

'4=JlCW P

I

P

~

PURGE

~cm

a:IID

G

fmjl

45678

ECM (ECCS CONTROL MODULE) . (ill


I

I~

CEID W

HEC041

EC-180

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS [ill EVAP Canister Purge Control Solenoid Valve (Cont'd) DIAGNOSTIC

PROCEDURE

INSPECTION START

m MEC296BB

~i5 B

ECM

II

~VV1

ister.

At Idle: Vacuum should not exist. Racing engine from Idle to 3,000 rpm: Vacuum should exist. NG

Crack

Ii)

[!J

CHECK CONTROL FUNCTION. 1. Check voltage between ECM terminal @ and ground with CONSULTor

Clogging

=:5---

~

CHECK COMPONENT (EVAP canister). (See page EC-29.) If NG, replace EVAP can-

9iagnostic trouble code No. 55 is displayed. 4. Disconnect vacuum hose to EVAP canister. 5. Set shift lever to 1st position. 6. Make sure that vacuum exists under the following conditions.

MEC325B

~

OK

L---.

ciently. 3. Perform diagnostic test mode II (Selfdiagnostic results). Make sure that

CONNECTOR

'f

CHECK VACUUM SOURCE TO EVAP CANISTER. 1. Jack up drive wheels. 2. Start engine and warm it up suffi-

OK --..

Check vacuum hose for clogging, cracks or improper connection.

tester under the following conditions. Voltage: At idle Approximately OV Engine speed is about 2,000 rpm

Improper connection SEF816F

Battery voltage

~i5

NG

I!l CHECK POWER SUPPLY. 1. Stop engine. 2. Disconnect EVAP canister purge control solenoid valve harness connector. 3. Turn ignition switch "ON".

~ SEF488Q

4. Check voltage between terminal @ and ground with CONSULTor tester. Voltage: Battery voltage

r

K

@

EC-181

NG

I-----.


QD,@ • 10A fuse • Harness for open or short between EVAP canister purge control solenoid valve and fuse If NG, repair harness or connectors.

•

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS [ill EVAP Canister Purge Control Solenoid Valve (Cont'd) @

~io

~io II

ECM

E

CONNECTOR

II

dfu

105

SEF489Q

1

CHECK OUTPUT SIGNAL CIRCUIT. 1. Turn ignition switch "OFF". 2. Disconnect ECM harness connector. 3. Check harness continuity between ECM terminal Gill and terminal G). Continuity should exist. If OK, check harness for short.

NG


NG

Replace EVAP canister purge control solenoid valve.

OK

CHECK COMPONENT (EVAP canister purge control solenoid valve). Refer to "COMPONENT INSPECTION". OK


INSPECTION END

COMPONENT

INSPECTION

EVAP canister purge control solenoid valve Check air passage continuity.

Condition

MEC488B

.

Air passage continuity between @ and

CID

Air passage continuity between @ and @


Yes

No

No supply

No

Yes

If NG, replace solenoid valve.

EC-182


ITEMS

EGR Valve and EVAP Canister Purge Control Solenoid Valve For Europe, Israel and Australia, models

and GA 15DE MIT

SYSTEM DESCRIPTION Camshaft position sensor

Engine speed






Throttle position

Ignition switch

Start signal


Vehicle speed

This system cuts and controls the port vacuum applied to the EGR valve and EVAP canister purge control solenoid valve to suit engine operating conditions. This cut-and-control operation is accomplished through the ECM. When the ECM detects any of the following conditions, current flows through the solenoid valve in the EGR valve and EVAP canister purge control solenoid valve control vacuum line.



This causes the port vacuum to be discharged into the atmosphere so that the EGR valve and EVAP canister purge line remains closed. • Engine starting • Closed throttle position • Low and high engine coolant temperature • During deceleration • Engine stopped • Vehicle speed: below 10 km/h (6 MPH) • Mass air flow sensor malfunction

COMPONENT

DESCRIPTION

Exhaust gas recirculation

(EGR) valve

The EGR valve controls the amount of exhaust gas routed to the intake manifold. Vacuum is applied to the EGR valve in response to throttle valve opening. The vacuum controls the movement of a taper valve connected to the vacuum diaphragm in the EGR valve.

SEF783K

EGR valve and EVAP canister purge control solenoid valve

l# Intake manifold vacuum signal

The EGR valve and EVAP canister purge control solenoid valve responds to signals from the ECM. When the ECM sends an ON (ground) signal, the coil in the solenoid valve is energized. A plunger will then move to cut the vacuum signal (from the throttle body to the EGR valve and EVAP canister purge valve). When the ECM sends an OFF signal, the vacuum signal passes through the solenoid valve. The signal then reaches the EGR valve and EVAP canister.

SEF240PF

EC-183

•

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS ~ EGR Valve and EVAP Canister Purge Control Solenoid Valve (Cont'd) For Europe and Israel

EC-EGRC/V-01

FUSE BLOCK

Refer to EL-POWER.

(JIB)

~

IN~91 BR

I

-: -:

SR

dJ~


~Cffi SR

I

BR

([) EGR VALVE & EVAP CANISTER PURGE CONTROL SOLENOID VALVE

I4=!ICW P

I

p

~

EGR


em

~CW

(ill)

B


B1~II(ij @ 3456 W

HEC042

EC-184

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS @K] EGR Valve and EVAP Canister Purge Control Solenoid Valve (Cont'd) GA 16DE for Australia

EC-EGRC/V-01 IGNITION SWITCH ON or START

10A

1251

FUSE BLOCK

Refer to EL-POWER.

•

(JIB)

~

-:

BR

-:

IITJ,@

Detectable 1ine for DTC Non-detectable line for DTC

=r='@

BR

I

I!i BR

EGR & EVAP VALVE CANISTER

PURGE CONTROL SOLENOID II111 VALVE =r='
I

P

~ EGR


em

till I Ifij em 3456

W

101 102 103

104 105 106

107 108 109

110 111 112

113 114 115

116 117 118


~(ffi

G

HEC074

EC-185

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS []K] EGR Valve and EVAP Canister Purge Control Solenoid Valve (Cont'd) DIAGNOSTIC

PROCEDURE

INSPECTION START

m Cf~H MEF51BE

CHECK OVERALL FUNCTION. 1) Jack up drive wheels. 2) Start engine and warm it up sufficiently. 3) Perform diagnostic test mode II (Selfdiagnostic results). Make sure that diagnostic trouble code No. 55 is displayed. 4) Set the shift lever to 1st position. 5) Make sure that EGR valve spring moves up and down (Use your finger) under the following conditions. At idle: SprIng does not move. RacIng engIne from idle to 3,000 rpm: Spring moves up and down.

INSPECTION END

~

NG

l!1

~I) II

ECM

~ID

-gcoNNEcTORII 103 105

~

~.1

CHECK VACUUM SOURCES TO EGR VALVE AND EVAP CANISTER. 1) Disconnect vacuum hoses to EGR valve and EVAP canister. 2) Make sure that vacuum exists under the following conditions. At idle: Vacuum should not exist. Racing engine from idle to 3,000 rpm: Vacuum should exist.

SEF179R

~=.

lNG Replace malfunctioning component(s).

I!l

[!J CHECK CONTROL FUNCTION. 1) Check voltage between ECM terminal @ or and ground under the following conditions. Voltage: At Idle Approximately OV Engine speed is 2,500 rpm Battery voltage

Crack

~NG

Clogging

~ ~

CHECK COMPONENTS (EGR valve, EGRC-BPT valve and activated EVAP canister). Refer to "COMPONENT INSPECTION". (See page EC-188.)

NG

GID

@ : For Australia @ : Except for Australia

OK -----...

Improper connection SEFB16F

EC-186

OK

----..

CHECK VACUUM HOSE. 1) Check vacuum hose for clogging, cracks or improper connection.

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS [QK] EGR Valve and EVAP Canister Purge Control Solenoid Valve (Cont'd)

~i8

@

CHECK POWER SUPPLY. 1) Stop engine. 2) Disconnect EGR valve & EVAP canister purge control solenoid valve har-

~ SEF488Q

Ii

~i5 II

ECM 103

]gCONNECTORII

~i8

NG

@,@ • 10A fuse

ness connector. 3) Turn ignition switch "ON". 4) Check voltage between terminal @ and ground.

• Harness continuity between EGR valve & EVAP canister purge control solenoid valve

Voltage: Battery voltage

dfu

and fuse If NG, repair harness or

OK

105


connectors.

Ii CHECK OUTPUT SIGNAL CIRCUIT.

@: For Australia @: Except for Australia

SEF238R

NG

1) Turn ignition switch "OFF". 2) Disconnect ECM harness connector. 3) Check harness continuity between ECM terminal Gill or @ and terminal G). Continuity should exist.


OK

CHECK COMPONENT (EGR valve & EVAP canister purge control solenoid valve). Refer to "COMPONENT INSPECTION". OK


INSPECTION END

EC-187

NG

Replace EGR valve & EVAP canister purge control solenoid valve.

•

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS @KJ EGR Valve and EVAP Canister Purge Control Solenoid Valve (Cont'd) COMPONENT INSPECTION EGR valve Apply vacuum to EGR vacuum port with a hand vacuum pump. EGR valve spring should lift. If NG, replace EGR valve.

MEF137D

EGRC-BPT valve 1) Plug one of two ports of EGRC-BPT valve. 2) Vacuum from the other port and check for leakage while applying a pressure above 0.981 kPa (100 mmH20, 3.94 inH20) from under EGRC-BPT valve. 3) If a leakage is noted, replace the valve.

+

Apply pressure SEF083P

EGR valve and EVAP canister purge control solenoid valve Check air passage continuity. Air passage

Air passage

continuity between @ and @


ply between terminals G) and @

Yes

No

No supply

No

Yes

Condition

12V direct current sup-

MEC4888

If NG, replace solenoid valve.

EC-188


ITEMS

Heated Oxygen Sensor (H02S) For Europe and Israel

EC-H02S-01 IGNITION SWITCH ON or START

10A

mJ

FUSE BLOCK

Refer to EL-POWER.

(J/B)

~

IN~OI -:

BR/Y

.I


-:

BR/Y

I[~]I~ '=r='@ BR/Y

I

BR/Y

rn

I4=Jl -

OR

HEATED OXYGEN SENSOR

I4=Jl W

F -;

tl

I I I I

W.~-~In I I

:

OR ~ 02H

mn 02S

JOINT CONNECTOR-6

@

ECM

B

8

I

(Eg~iROL MODULE)

(IT)

Bjl Illjj @ 3456 W

~

~GY

~cw

[I[I]1]I[ill]

..J

...1.. __

1 8

(ffi)(ffi)

Refer to last page (Foldout page) . GY

HEC048

EC-189

•

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS Heated Oxygen Sensor (H02S) (Co nt' d) GA16DE for Australia

(A/T models)

EC-H02S-01 IGNITION SWITCH ON or START 10A

rnJ

FUSE BLOCK (J/B)

Refer to EL-POWER.

~

IN~OI BR/Y

-:

Detectable

I

-:

Non-detectable

BR/Y

for DTC

line

line for DTC

I$I~ @

BR/Y

I

BR/Y

rn

-

~

OR

HEATEO OXYGEN SENSOR

<0

Ibi=ll W

~

;

tl

I I I I I I

W.~~~ :

OR

uil5il

rr16il

02H

02S

JOINT

CONNECTOR-6

CW

ECM

In

B B B

,_I.J

(~g~¥ROL MODULE)

1_

-L

~

(IT)

Refer to last page

~III'ti} 3456

@ W

~cw IIITIIII[ll!]

(Foldout

page) .

GY

101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 HEeDBD

EC-190

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS Heated Oxygen Sensor (H02S) (Cont'd) The heated oxygen sensor is placed into the exhaust manifold. It detects the amount of oxygen in the exhaust gas compared to the outside air. The heated oxygen sensor has a closed-end tube made of ceramic zirconia. The zirconia generates voltage from approximately 1V in richer conditions to in leaner conditions. The heated oxygen sensor signal is sent to the ECM. The ECM adjusts the injection pulse duration to achieve the ideal air-fuel ratio. The ideal air-fuel ratio occurs near the radical change from 1V to

av

L

av.

Healer pad Zirconia tube

Isolalion bearing

SEF406H

2: :>

•

1

Q)

Ol

~

0 >

::; c. ::; 0

,,"-0

Rich-

Ideal ratio

_

Lean

Mixlure ratio SEF288D

m

DIAGNOSTIC •

INSPECTION START

ACCELERATE TO 2000 RPM AND HOLD THEN TOUCH START

I£J

1800

2200

2000

II

NEXT

START

~J SEF815L

m *

PROCEDURE

MIXTURE RATIO TEST.

CHECK OXYGEN SENSOR CIRCUIT. 1) Start engine and warm it up sufficiently. (F.i\ 2) Perform "MIXTURE RATIO ~ TEST" in "FUNCTION TEST" mode with CONSULT. OR

MONITOR

*

NO FAIL

CMPS.RPM (REF) MIR FIC MNT

(F.i\

D

~

2000rpm RICH

fti>\ ~

I

RECORD

SEF522Q

........ e",/ \

-

I /

CHECK-

",/

2) Make sure that "M/R FIC MNT" in "DATA MONITOR" mode indicates "RICH" and "LEAN" periodically more than 5 times during 10 seconds at 2,000 rpm. OR

2) Stop engine and set ECM Diagnostic Test Mode /I (Heated oxygen sensor monitor). 3) Restart engine and run it at about 2,000 rpm for about 2 minutes under no-load. 4) Keep engine speed at 2,000 rpm and make sure that the malfunction indicator lamp on the instrument panel goes on and off more than 5 times during 10 seconds. NG

........

/

I \

@


EC-191

OK

INSPECTION END

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS Heated Oxygen Sensor (H02S) (Cont'd) @

1

I;)

CHECK INPUT SIGNAL CIRCUIT. 1. Stop engine. 2. Disconnect ECM harness connector and heated oxygen sensor harness connector. 3. Check harness continuity between ECM terminal @ or @ and terminal

~ ~

~i5 Il

46

@: @:


~i5 cilltD

'QcoNNECTORII

ECM

19

For Australia NT models SEF181R



@.

SEF180R

I;)

NG

--.

1

0K

CHECK HEATED OXYGEN SENSOR HEATER CIRCUIT. 1. Reconnect harness connectors. 2. Start engine. 3. Check voltage between ECM terminal @ (For Europe and Israel) or @ (For Australia AfT models) and ground with CONSULTor tester under the following conditions. Voltage: Engine speed is below 3,200 rpm Approximately OV Engine speed is above 3,200 rpm Battery voltage

OK

--.

Go to "CHECK COMPONENT".

NG

[!J

SEF646P

For Europe and Israel, and GA15DE.L.J engine models Engine ground @, @ \ ~ ~

CHECK POWER SUPPLY. 1. Stop engine. 2. Disconnect heated oxygen sensor harness connector. 3. Turn ignition switch "ON". 4. Check voltage between terminal @ and ground. Voltage: Battery voltage

-----

\


aD,@ • 10A fuse • Harness for open or short between heated oxygen sensor and fuse If NG, repair harness or connectors.

OK

'1

.~

CHECK OUTPUT SIGNAL CIRCUIT. 1. Turn ignition switch "OFF". 2. Disconnect ECM harness connector. 3, Check harness continuity between terminal G) and ECM terminal @ (For Europe and Israel) or Gill (For Australia AfT models) . Continuity should exist. If OK, check harness for short.

t

OK

,~\

NG

~

C/

Power steering", fluid reservoir __\

W~

~

:'C"",, EC-192

NG

-----...


TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS Heated Oxygen Sensor (H02S) (Cont'd) @

Loosen and retighten engine ground screws. OK

CHECK COMPONENT (Heated oxygen sensor heater). Refer to "COMPONENT INSPECTION" below.

NG

Replace heated oxygen sensor.

OK

Disconnect and reconnect harness conne~tors in the circuit. Then retest. Trouble is not fixed. Check ECM pin terminals for damage or the connection of ECM harness connector. Reconnect ECM harness connector and retest. Trouble is not fixed. Replace heated oxygen sensor.

COMPONENT

INSPECTION

Heated oxygen sensor heater

DISCONNECT

I~J

00 SEF586Q

Check resistance between terminals @ and CD. Resistance: 2.3 - 4.3Q at 25°C (77°F) Check continuity between terminals @ and CD, @ and @. Continuity should not exist. If NG, replace the heated oxygen sensor. CAUTION: • Discard any oxygen sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a hard surface such as a concrete floor; use a new one.

EC-193

•


ITEMS

Oxygen Sensor (02S) Except for Europe and Israel

EC-02S-01 _.


line

for DTC -:


em

02S

~

Detectable

w

~,-----....

(-

1 1 I

I I 1 1

I I I 1 1 I

1 I I 1 I I I I I I I

rn

JOINT

CONNECTOR-6 @

1

I I 1

I I

-

_I -)

w

rn

8

OXYGEN SENSOR @

n

8

8

i.J 1 m m

~@

rn:II.ITIIillJ

GY

HEC049

EC-194

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS Oxygen Sensor (02S) (Coni' d) GA16DE for Australia

(M/T

models)

EC-02S-01

Detectable line for OTC Non-detectable line for OTC

-:


-:

•

02S 1~61

w

-

~ ~1 1 I

I

I 1 1 1 I 1 1 I

I 1

I 1

I I I

I I I I 1 1 1 I I 1 I 1 1 1 I I 1 1 I 1r

rn

JOINT CONNECTOR-6 @

1

_I

w m

~

I I I

)

B

OXYGEN SENSOR ~

n

B

~...J

-!-

(F13)

B

1

(F14)

-

~cw

ITIIIITill.IIJ

GY

101 102 103 104 105 106 107 10B 109 110 111 112 113 114 115 116 117 llB

HEC081

EC-195

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS Oxygen Sensor (02S) (Cont'd) Oxygen

sensor

Louver Zirconia

tube

r

Holder

Connector bushing

Isolation Contact

The 028 is placed into the exhaust manifold. It detects the amount of oxygen in the exhaust gas compared to the outside air. The sensor has a closed-end tube made of ceramic zirconia. The zirconia generates voltage from approximately 1V in richer conditions to OVin leaner conditions. The sensor signal is sent to the ECM. The ECM adjusts the injection pulse duration to achieve the ideal air-fuel ratio. The ideal air-fuel ratio occurs near the radical change from 1V to OV.

plate AEC854

~ :> Q)

OJ

.!!1

~ '5

0-

'5

o

,'--

o Rich

---

_

Ideal ratio Mixture

Lean

ratio SEF288D

m

DIAGNOSTIC

INSPECTION START

ACCELERATETO 2CXXJ RPM AND HOLD THEN TOUCH START

~

2CXXJ 2200

1800

II

NEXT

START

~J SEF815L

m

PROCEDURE

• MIXTURE RATIOTEST.

1;{

MONITOR

1;{

NO FAIL

CMPS.RPM (REF) MIR FICMNT

\..!!J

D

2000rpm RICH

I

RECORD

SEF522Q

\ -

'~/'

/

CHECK OXYGEN SENSOR CIRCUIT. 1. Start engine and warm it up sufficiently. (F.i\ 2. Perform "MIXTURE RATIO ~ TEST" in "FUNCTION TEST" mode with CONSULT. OR (F.i\ 2. Make sure that "M/R FIC MNT" in "DATA MONITOR" mode indicates "RICH" and "LEAN" periodically more than 5 times during 10 seconds at 2,000 rpm. OR ~ 2. Stop engine and'set ECM ~ Diagnostic Test Mode II (Oxygen sensor monitor). 3. Restart engine and run it at about 2,000 rpm for about 2 minutes under no-load. 4. Keep engine speed at 2,000 rpm and make sure that the malfunction indicator lamp on the instrument panel goes on and off more than 5 times during 10 seconds.

I / CHECK-

I I \

Malfunction lamp

NG

"-

@

indicator SEF051PA

EC-196

OK

INSPECTION END

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS Oxygen Sensor (02S) (Conl'd) @

CHECK INPUT SIGNAL CIRCUIT. 1. Stop engine. 2. Disconnect ECM harness connector and oxygen sensor harness connector. 3. Check harness continuity between ECM terminal @ or @ and terminal

NG


CD.

II

~Io 19'

ECM

46

CONNECTOR


II

~iV @

19

OK

Loosen and retighten engine ground screws. OK


@:

For Australia M/T models

@:


Trouble is not fixed. SEF182R

Check ECM pin terminals for damage or the connection of ECM harness connector. Reconnect ECM harness connector and retest. Trouble is not fixed. Replace oxygen sensor.

CAUTION: • Discard any oxygen sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a hard surface such as a concrete floor; use a new one.

EC-197

•


ITEMS

Valve Timing Control (VTC) SYSTEM DESCRIPTION Mass air flow sensor



Engine speed




Throttle position


Valve timing control solenoid valve

The valve timing control system is utilized to increase engine performance. Intake valve opening and closing time is controlled, according to the engine operating conditions, by the ECM. Engine coolant temperature signals, engine speed, amount of intake air, throttle position, vehicle speed and gear position are used to determine intake valve timing. The intake camshaft pulley position is regulated by oil pressure, which is controlled by the valve timing control solenoid valve. Valve timing control ~

'o'""oid ,,',"

»

Ii Intake air signal (From mass air flow sensor) EGM (EGGS control module)

Engine speed signal (From camshaft position sensor) Engine coolant temperature (From engine coolant temperature sensor) Throttle valve idle position (From throttle position sensor) Vehicle speed (From vehicle speed sensor)

Drain .. Piston

"'- Camshaft (Intake side)

/ Return spring

/

Camshaft sprocket MEF572DA

EC-198

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS Valve Timing Control (VTC) (Co nt' d) OPERATION

•

Engine

operating

Engine

coolant

Valve

condition

timing

solenoid

control

Intake

valve

valve

opening

and closing

time

Valve

overlap

Engine

torque

curve

temperature

is 70"C (158"F) or more . •

Engine

load

•

Engine

speed

is high . is between

ON

Advance

Increased

@

OFF

Normal

Normal

CD

1,500 rpm and 5,100 rpm . •

Engine

speed

is 6,800 rpm or

more. Those

other

than

above

CD Valve

(VTC) solenoid valve is OFF.

@

Valve timing control

(VTC) solenoid valve is ON.

f __~

t

Effr Torque

timing control

~

L__

_

Engine speed

--+-

Except for Australia Overlap

(18°)

Intake valve open lime

Exhaust valve open time Intake closes

BOC

@

CD For Australia I~

TOC

Overlap (-12°)

, Intake opens

Intake valve open time

Exhaust valve open time intake cioses

BOC

CD

@

EC-199

SEF183R

•

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS Valve Timing Control (VTC) (Cont'd) GA16DE engine models except for Europe and Israel

EC-VTC-01 IGNITION SWITCH ON or START 10A

1251

FUSE BLOCK

Refer to EL-POWER.

(JIB)

IN~91 BR

Irn@)

-: -:

8R

U4Jl@

Oetectable line for DTC Non-detectable line for DTC

BR

I

BR

VTC

SOLENOID VALVE

14=JJ~

~ Y/R

I

Y/R ~ VTC

ECM (ECCS CONTROL MODULE) ill)

fill I

45678,~@W


~
B

HEC050

EC-200

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS Valve Timing Control (VTC) (Cont'd) GA 16DE for Australia

EC-VTC-01 IGNITION ON

or

SWITCH

START

10A

1251

FUSE BLOCK

Refer to EL-POWER.

•

(JIB)

~

IN~gl BR

I

-: -:

BR

dJ@

Detectable line for DTC Non-detectable line for DTe

lkfdI cru SR

I

SR

VTC

SOLENOID

VALVE

l4=JI(ffi)

~

Y!R

I

Y/R

nffin VTC

ECM (ECCS

CONTROL MODULE)

(ill

fIll I I~ em 3456

W


~ffi) ll..!.@jJ

B

104 105 106

101 102 103 107 108 to9

110 111 112

113 114 115

116 117 118

HEC082

EC-201

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS Valve Timing Control (VTC) (Cant' d) DIAGNOSTIC

0

• ACTIVETEST.

PROCEDURE

INSPECTION START

OFF

VALVE TIMING SOL

==========

m

==========

MONITOR CMPS.RPM(REF) 800rpm AAC VALVE 16%

IION/OFF IEDI

ON

CHECK OVERALL FUNCTION. 1. Start engine and run it at idle. 2. Perform "VALVE TIMING SOL" in "ACTIVE TEST"

00

00

~CONNECTORII

ECM

12

114

INSPECTION END

mode with CONSULT and make sure that improper idle condition occurs. OR

SEF523Q

~£) II

~

1. Connect a suitable jumper wire between ECM terminal @ or @ and body ground. 2. Start engine and make sure that improper idle condition occurs.

~

NG

@): For Australia 12

: Except

for Australia

SEF184R

CHECK ELECTRICAL CONTROL FUNCTION. 1. Stop engine.

~i)~ID~ II

ECM

NCONNECTORII

A~fl"'" @:

@@

CHECK COMPONENTS (VTC solenoid valve and VTC valve). Refer to "COMPONENT INSPECTION" on next

3. Start engine and warm it up sufficiently.

page.

4. Shift gear to 1st position. 5. Check voltage between ECM terminal @ or @ and ground under the

NG

following conditions. Voltage: Racing engine quickly from idle to 4,000 rpm Approximately OV


OK

-+

2. Jack up drive wheels. M/T
~ @):

iii

SEF185R


At idle Battery voltage NG

.

[!J CHECK POWER SUPPLY. 1. Stop engine. 2. Disconnect VTC solenoid valve harness connector. 3. Turn ignition switch "ON". 4. Check voltage between terminal @ and ground. Voltage: Battery voltage

~r5

OK

~ SEF507Q

EC-202

NG

~

Check the following. • Harness connectors QD,@or@,

@ • 10A fuse • Harness for open or short between VTC solenoid valve and fuse If NG, repair harness or connectors.

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS Valve Timing Control (VTC) (Cont'd)

~i5 II

E

ECM

CONNECTOR

12

114

:

@:

II

~i5 I!]

~

114

CHECK OUTPUT SIGNAL CIRCUIT. 1. Turn ignition switch "OFF". 2. Disconnect ECM harness connector. 3. Check harness continuity between ECM terminal @ or (ill) and termi-


NG

~


nal CD. Conlinuity should exist.

SEF186R

If OK, check harness for short. • VALVE TIMING SN CKT.

OK

DOES THE SOLENOID

(I

VALVE MAKE

CHECK COMPONENT (VTC solenoid valve). Perform "VALVE TIMING SIV CKT" in "FUNCTION TEST"

AN OPERATING SOUND

II

NO

II

YES

NG

~

Replace VTC solenoid valve.

@)

EVERY 3 SECONDS?

NEXT

.

I MEF813D

@

mode with CONSULT. OR Refer to "COMPONENT INSPECTION" below. OK

Disconnect and reconnect harness connectors in the circuit. Then retest. Trouble is not fixed.


INSPECTION END

COMPONENT

Valvetiming control solenoidvalve Plunger

VTC solenoid valve 1. 2.

i

Supply VTC solenoid valve terminals with battery voltage. Make sure that inside plunger protrudes. If NG, replace VTC solenoid valve.

~ ~

INSPECTION

AEC889

EC-203

•


ITEMS

IACV-FICD Solenoid Valve LHD models

EC-FICD-01 FUSE BLOCK

Aefer

(JIB)

~

to

EL-POWEA.

-:

L/Y

-:

(E106)

1QlI

LHD models RHO models Detectable line for DTC Non-detectable line for DTC

LIS

I

LIB

LG/A

-B> Next

L/A

+ (Aefer to HA-A/C.)

page

L/Y

1_~_1

I~_!_~I~~~TIONER

dJ

~~

Y

L/R

•1

I

I O--

o~ ..

~L

k

l

():100 (MID ~

I~I

Y

Y

tElOO

CMID

~

To compressor

(HOt)

CHID

-
L/A ~

L/A

L/R ~

L/R ~

(E100

L/R ~9

qJ CEID

CHID

r.l~ ~OL

m~ L/R

R

~~2~SOLENOID

~

I

VALVE

Ibi=!lffi

Y d::,~

B

Y

.--

ICiJI @

1

IfTI;J

I ~ I I

ECM

ACRLY

~________

(

To ECM

B/Y

SlY

B

tl...1


em

ill

+ (ECCS control module)

1 B

(F13)

Aefer to last page

+ 2

1

(Foldout

IZlffi CITID PU

L

5

page) .

CHID , (~fo})

,

HEC051

EC-204

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS IACV-FICD Solenoid Valve (Cont'd)

EC-FICD-02 Preceding

~

page

~

LGIR

_

: *1 ... -:

THERMISTOR

,
GY


-:

THERMO CONTROL AMPLIFIER

LHO models RHO models G/B

•

Q1W

...

(El0n

CHID

-l@}- SB
;:--

SB

0/

0-
SB

~

*1

+

To AIC (Refer

switch to HA-AlC.)

SB

I

SB

rm

--

LOW

HIGH

.... ...,

NORMAL

OUALPRESSURE SWITCH

~

~ G

I

0-<1>-

L ~

G

~

(El0l) G

~

G

CHID G

~

~@

~

-
G

-[D

G

it G

fi4TI ARCON

(ECCS IEeM CONTROL MODULE)

em

Refer to (Foldout

~ 2 ~3

last page page) .

CHID , (ElM

W

HEC052

EC-205

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS IACV-FICD Solenoid Valve (Cont'd) RHO models

EC-FICD-03 FUSE BLOCK -:

Refer to EL-POWER.

(JIB)


-:

~

L/Y

I

(EI06)

IN.21 LG/R

L/Y

AIR ~I~~~~~TIONER ~ ~ru>

Ir---------

L

L

THERMO CONTROL AMPLIFIER <8[D

L/R •

I

m

THERMISTOR

~

... .......

LOW

HIGH

~

NORMAL

DUALPRESSURE SWITCH

m

~

G.Y

L/R

r=!:::,@

IqJlcm

I ,

-

To A/C

I

switch

_

HA-A/C.)

r.:::b,@

....

G

....

d=~

~

•

RIL

GY

14.41

Ii4TI

THAMP

ARCON

----

T 2

5

1

L

B

•

tt----

I

cgw W

~3

B/Y +

r-1

B/Y B

1~C~~M control module)

B

t...l 1 m


2

IACVFICO SOLENOID VALVE

~CfID

@)

I~I

ill)

U])

m L/R

GY

Ir~'Rll(Elan ~
wm ACRLY

~CBID

tt- GY + (Refer to

1f6"1~1 ~R/L

G

•

L/R

ukll (EIOn

~

R IL

~r.:::b,

1C4Jlcm

+TO compressor (Refer to HA-A/C.)

L/R

fG"A'i"\\

l4JJ G

tt-- ...- L/R

0:13)

~

<:!IillHIID

CfID BR


HEC053

EC-206

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS IACV-FICD Solenoid Valve (Cont'd) GA 16DE for Australia

_. -:

EC-FICD-01 Detectable line for DlC Non-detectable line for DTC

FUSE BLOCK ~

L!Y

CE106)

IN.21

I .... .

HIGH

....

--

NORMAL

Y

L/R

+TO

compressor (Refer to HA-A/e.)

ukll CE101)

11i=!l;ll (El0!) ~CBID

~CBID

L/R r=b~

Y

I

L/R

It I

Y

r=b~

Il4Jl <£[) Y

~CHID

d:,~

ICiJI <£[) G

Y

IDilt

Irfffil

ARCON

ACRLY

FICO lACVSOLENOID VALVE

~@

I

G

B

•1-

B/Y

I n

ECM (ECCS CONTROL MODULE) (IT)

------------------ I L

i-

IqJ'cru L/R •

1r!R1I CE101)

T

~12~~~VIONER ~....... I@

L/R •1 --1 L!R

OUALPRESSURE SWITCH

lk¥J G

A,@

•

AIR

-------I

To A/e SWitch + (Refer to HA-A/C .J

I

L!Y

~G/R ~

THERMO CONTROL AMPLIFIER ~

LOW

Refer to EL-POWER.

(J/B)

B/Y

B

t-J ill

+~~CE~M control module)

B

1
~ 2 ~3

~

W

~BR

CEID

(Foldout

page) .

CHID , (El0!)

cH:W

, CE106)

101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118

HEC083

EC-207

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS IACV-FICD Solenoid Valve (Cont'd) COMPONENT

DESCRIPTION

When the air conditioner is on, the IACV-FICD solenoid supplies additional air to adjust to the increased load.

valve

MEC289BA

GA 6DE except for Europe and Israel

DIAGNOSTIC

'""k, mM,o"l\

PROCEDURE

INSPECTION START

m '

~ valve (with

[ {

~.

iAcv-AAC / IACV-FICD solenoid valve)

harness connector

MEC286BA

GA14DE, GA16DE for Europe an Israel

~'IACV_FIICI~'~O~~'d~

(\ ~

~valve harness~ connector

CHECK

OVERALL

FUNCTION.

O~L.- __

I_N_S_P_E_CT_I_O_N_E_N_D __

1. Start engine and warm it up sufficiently. 2. Check idle speed. Refer to EC-36. If NG, adjust idle speed. 3. Turn air conditioner switch and blower fan switch "ON". 4. Recheck idle speed. 900 rpm or more (AIT in "N" posi-

/

tion)

NG Check if air conditioner functions normally.

compressor

NG

Refer to "TROUBLE DIAGNOSES" in HA section.

NG


OK

CHECK

POWER

SUPPLY.

1. Turn air conditioner switch "OFF" and stop engine. 2. Disconnect IACV-AAC valve or IACVFICO solenoid valve harness connector. 3. Restart engine, then turn air condiMEF634E

tioner switch and blower fan switch "ON". 4. Check voltage between terminal (1) and ground with CONSULTor tester. Voltage:

Battery

voltage

OK

* 1 : For Europe and Israel

* 2:

~n t

~ Except for Europe and Israel

SEF187R

EC-208

QD,@ • Harness connectors

@,@ • Harness for open or short between IACVAAC valve or IACVFICO solenoid valve harness connector and air conditioner relay If NG, repair harness or connectors.

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS IACV-FICD Solenoid Valve (Cont'd) [!J

~i5~i5 dfu

o.

J

@a

c:illffiID

E",0p, "d ,,,,~

o : Except for Europe and Israel

SEF239R

NG

CHECK GROUND CIRCUIT. 1. Turn ignition switch "OFF". 2. Check harness continuity between terminal @ or @ and body ground. Continuity should exist. If OK, check harness for short.

Repair harness ~ nectors.

_J

OK

NG

CHECK COMPONENT (IA"CV-FICD solenoid valve). Refer to "COMPONENT INSPECTION"

Replace IACV-FICD solenoid valve.

below. OK

Disconnect and reconnect harness connectors in the circuit. Then retest. Trouble is not fixed. Check ECM pin terminals for damage or the connection of ECM harness connector. Reconnect ECM harness connector. Then retest.

INSPECTION END

COMPONENT

r14 10

INSPECTION

IACV-FICD solenoid valve Israel

CITfl:B

1. 2.

Except for Europe and

Disconnect IACV-AAC valve harness connector. Check resistance between terminals G) and CID. Resistance: 75 - 125Q [at 25°C (77°F)] If NG. replace the solenoid valve.

AEC896

IACV-FICD solenoid valve •

Check for clicking to terminals.

EC-209

Europe and Israel

sound when applying

12V direct current

•

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS IACV-FICD Solenoid Valve (Cont'd) • •

•

Check plunger for seizing or sticking . Check for broken spring.

~ho~

a::?\SPriOg [PlUnger SEF163N

EC-210


ITEMS

Electrical Load Signal

LHD MODELS

EC-LOAD-01 ECM (ECCS CONTROL MODULE)

75A

m

Refer

to

W

H/FAN

EL-POWER.

1~51

BIR

G/Y

•

CEID

~O-(QD-~

I$I

I

G/Y@

*1

rrffil

~

I

G/Y 2ND LIGHTING SWITCH

~T

I

rn

(E107)

OFF'-

~

JUNCTION

BOX NO.2 (JOINT CONNECTORS)

4=U~

*2 I

G/Y

O-
r.l.

RIL

BIR

~

r=:b,

r=:b,

TAIL/L

TAIL

111111

WIR 10A

SW

1451

~

II 1 II

6

FAN

DAYTIME LIGHT

FUSE

TAIL/L L..-.,.,:..,OU;,.,...T....-

R/Y

I

G/Y

ON

UNIT

--' ~

OFF-~

~

~

RIB

O-----l *3

I Q(E106) 3 1

FUSE

l4dJ B

*2 .. '@RIL

BLOCK (JIB)

RIG RIG

'@W/R

*3 ...
I~BI ~ 1

@

I

(I)

SWITCH

.fA-. Next ~page


~
~

~GY

, CE106)

~

~@ ~w

HEC054

EC-211

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS Electrical Load Signal (Cont'd)

EC-LOAD-02

.-----20A

20A

m

[[] Pl'

rn!

IQ~OI

LIB

BR

.,=

L/R

G/R

m

IrJPl CHID
I

In

REAR ~1~ WINDOW DEFOGGER ONU SWITCH OFF-@:@ 11211

FUSE BLOCK

1251

~

(JIB)

Refer to EL-POWER.

(106) ~120)

REAR I ~~r~~GER WINDOW

-1-i~'---I-i"""""l m:@)

L/R

~g~~~CTOR-2 @)

10A

L/R

~

L

..J

L/R

I.4=JI

To rear window G/R ~~~~~~~e~otimer

EL-DEF .)

~ L/R

DIOOE-1 ~

~

~

@: With daytime light

-.m@ R

OIOOE-2~

Preceding ---At- RIG ~ page ~

2

R

I

@:

I

-:

R

-:

!!4Jl@

system Without daytime light system Detectable line for OTC Non-detectable line for OTC

R

13'31 LOAD

ECM (ECeS CONTROL MODULE) (fD

f1Till1~

1m

W

rrrITrl@ ~~ ITlIl] GY W,gJ'

~

+ 2

1

5


m (!IIII~ L 3 4 5 6

@ W

CHID , m ~

, (106) , @Q)

HEC055

EC-212


RHO MODELS

EC-LOAD-03

FUSE BLOCK

Refer to EL-POWER.

(JIB)

~ ~

LIB 1

~

@: For Europe @: Except@ Detectable line -:

2ND LIGHTING SWITCH

REAR WINDOW ON DEFOGGER SWITCH OFF-- , ~

(E10?)

~

~

L~R DIODE-1 ~

OO e-

~R:~ ~ FUSE BLOCK (JIB)

UN.BI ~

2

R

6~

<$> R

DIODE-2 ~ R

{#Jjf{I}

RIG RIG

..J LG/B 6

I R

rn~ rn~ O~

LG/BIGA"?i\ r=b~

I

It

LG/B

rI

1@5J1 H/FAN

LOAD


------------------- I ~---------------------~ ~@ ~w

F1Tffi~ L

l4=!J B

LG/B

I IT3n

W

~

IU/JI@

R

rn:rn:rn

FAN SWITCH ~

ON OFF--

~R em I!4=lJ @ R

~

for DTC Non-detectable line for DTC

-:

B B

I

B B

L~ L~ -!-

(M68)

-!-

I

B

1

(M60) CM28)

Refer to last page (Foldout page') . ~

, (E106)

~

HEC056

EC-213

•

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS Electrical Load Signal (Cont'd) GA 16DE for Australia

EC-LOAD-01 lOA

FUSE

1361

m 20A

BIR

I

BLOCK (JIB)

Refer to EL-POWER.

~

~

LIB

I

BIR

LIB

rrffil

l

2ND LIGHTING SWITCH

~

OFF ...._1ST

l1JJ ON


-:

OFF--

-:

REAR WINDOW DEFOGGER SWITCH ~

lbi=ll

~

L/R

RIL

I

R/L Q'3

I (EiOS) FUSE BLOCK (JIB)

LG/B

~IN181~

6

RIG

I

RIG

FAN SWITCH @

ON OFF-IU"ArI\

r=:b,~

'RIG Uil' CEID

LIR

LG/B

I$I@

IlJlll CEID

L/R

LGIB

r::::b@

@

I

L/R

LG/B

~

115'51

1351

R/DEF

H/FAN


em

~~

tiliIiI

W

lll' III~~ 3456

I4J B

It

I

RIG H!LMP

~

W

B B

I

B B

B

L~ L~ -!-

~

-!-

(M60)

1

@

Refer to last page

~@ ~W

(Foldout

page) .

101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118

HEC084

EC-214


*

MONITOR

*

NO FAIL

LOADSIGNAL

0

DIAGNOSTIC

PROCEDURE

INSPECTION START

OFF

m ___

I

RE_C_O_R_D __

MEC212B

CHECK OVERALL FUNCTION-I. 1) Turn ignition switch "ON", 2) Check "LOAD SIGNAL" in "DATA MONITOR" mode with

00

ECM

.

ECONNECTORII 33 55

@ @: 33 :

*

Ii]


MONITOR

*

(Go to

I

Procedure A

I,)

•

Rear window defogger switch is "OFF": OFF OR 2) Check voltage between ECM terminal @ or @ and ground under the following conditions. Voltage: Rear window defogger switch is "ON". Battery voltage Rear window defogger switch is "OFF".

SEF240R

NO FAIL

LOADSIGNAL

Check rear window defogger circuit.

CONSULT. Rear window defogger switch is "ON": ON

~15@a0 II

NG

----+

0

OFF

Approximately OV OK

Ii]

L,__

R_E_CO_R_D__

I MEC212B

~15~ II

€I'

ECM 33

CONNECTOR

CHECK OVERALL FUNCTION-II. 1) Turn rear window defogger switch "OFF",

00 II

60

@ @: 33 :


~15~ II

ECM 45

E

CONNECTOR

SEF241R

II

2) Check "LOAD SIGNAL" in "DATA MONITOR" mode with CONSULT. Lighting switch is "ON": ON Lighting switch is "OFF": OFF OR 2) Turn ignition switch "OFF" 3) Check voltage between ECM terminal i@J or @ and ground under the following cond itions. Voltage: Lighting switch is "ON". Battery voltage Lighting switch is "OFF". Approximately OV

r-

35

(A)

@: 45 ,


SEF197R

EC-215

NG

----+

Check lighting switch circuit. (Go to

I

Proceduffil?J)

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS Electrical Load Signal (Cont'd) @

CHECK POWER AND GROUND CIRCUIT 1. Turn ignition switch "OFF". 2. Check continuity between ECM terminal @ or @ and ground. Blower fan switch "ON" Continuity should exist. Blower fan switch "OFF" Continuity should not exist. OK

Disconnect and reconnect harness connectors in the circuit. Then retest. Trouble is not fixed. Check ECM pin terminals for damage or loose connection of ECM harness connector. Reconnect ECM harness connector and retest

INSPECTION END

EC-216

NG


QD,@ • Joint connector

@ • Harness continuity between ECM and fan switch, fan switch and ground If NG, repair harness or connectors.


~ 15 ECM 55

~ 15 I

P_RO_CE_DU_RE_A

II

_

INSPECTION START

ECON NECTOR 33

Check if rear window defogger functions normally.

@:

For Australia

@:


NG

Check rear window defogger circuit. (Refer to "REAR WINDOW DEFOGGER" in EL section.)

NG


OK SEF19SR

I;J CHECK INPUT SIGNAL CIRCUIT. 1. Turn rear window defogger switch "OFF". 2. Turn ignition switch "OFF". 3. Disconnect ECM harness connector and rear window defogger switch harness connector. 4. Check harness continuity between ECM terminal @ or @ and terminal @. Continuity should exist. If OK, check harness for short. OK


INSPECTION END

EC-217

@,@orQI), @ • Diode@ • Joint connector

@ • Harness for open or short between ECM and rear window defogger switch If NG, repair harness or connectors.

•


II Except

for Australia

~Io

II

ECM

E!'CON NECTOR

I

PROCEDURE B

~io ----~

INSPECTION START

II

33

Check if lamps light when lighting switch is turned "ON".

NG

-----..--..

NATION SWITCH" in EL section.)

OK

II

~15 ECM

19"

CONNECTOR

II

~i5

33

* 1 : LHD models and RHD models for Europe

* 2 : RHD models except for Europe

SEF188R

II

1='

Ii CHECK INPUT SIGNAL CIRCUIT. 1. Turn ignition switch "OFF". 2. Disconnect ECM harness connector and lighting switch harness connector. 3. Check harness continuity between ECM terminal @ or @ and terminal @. Continuity should exist. If OK, check harness for short. OK

For Australia

~&5 =E=CM===IE[

CONNECTOR

II

~15 Disconnect and reconnect harness connectors in the circuit. Then retest.

60


SEF199R

Check lighting switch circui!. (Refer to "COMBI-


INSPECTION END

EC-218

NG

-----..--..

Check the following. • Harness connectors CID,@or@, @orQD,@ • Harness connectors

@,@ID .Diode@ • 10A fuse • Daytime light unit • Harness for open or short between lighting switch and diode If NG, repair harness or connectors.


ITEMS

Torque Converter Clutch Solenoid Valve

EC-LKUP-01 -:


-: FUSE BLOCK

10A

rn

Refer

to


EL-POWER.

•

(JIB) (Ef06)

IQ.61 y

I

y

1l1J1 ffi =r (E202) y

I

y

r::b, TORQUE

3

CONVERTER CLUTCH SOLENOID II 111 VALVE ~

=r

(E223)

PIB

I

PIS r::b,@i)

Il4Jlm PIB

L

(E10!)

PiS ~

CHID

(M49)

PIS -- PIS ~~

CEID P/S"""l PIS

Ii1N LKUP


em


~~

~~~~ ~

S

w.g@>

S

~S

HEeD5?

EC-219

em

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS Torque Converter Clutch Solenoid Valve (Cont'd) GA16DE for Australia

(A IT models)

EC-LKUP-01 IGNITION SWITCH ON 01" START Refel"

FUSE BLOCK (JIB)

10A

rn

to

EL-POWER.

_.

Detectable fol" DTC

line

-:

Non-detectable line fol" DTC

UQj611

y

$= I

y

y

I

y

r=!::,

3

TORQUE CONVERTER CLUTCH SOLENOID

~ ~~E

P/B

I

P/B r=!::,

CE201)

1C4J1~ P/B

L

@@

~CM8)

PIS ~

PIS -- PIS ~~

PiS ~ P/B

Ii3tiJ LKUP


em

~~ lIDIDZIID

~~

B

w.g@)


FmB1~ B

~

B

101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118

HEC085

EC-220

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS ~ Torque Converter Clutch Solenoid Valve (Cont'd) SYSTEM DESCRIPTION Throttle valve opening angle





Vehicle speed

The AfT lock-up is controlled by the ECM through the torque converter clutch solenoid valve. When the ECM detects any of the following conditions, the ECM switches the torque converter clutch solenoid valve OFF to accomplish lock-up Dperation. While the vehicle is in conditions other than below, the torque converter clutch solenoid valve is always set to ON, releasing the lock-up operation.

~

i3~

ECM

HCONNECTORII

m II

30

DIAGNOSTIC

E

CONNECTOR

30

valve

Throttle position is open . Engine coolant temperature is 60°C (140°F) or • more. Vehicle speed is 58 kmfh (36 MPH) or more .

PROCEDURE

115

CHECK CONTROL FUNCTION. 1. Jack up drive wheels. 2. Start engine and warm it up sufficiently. 3. Shift selector lever to "D" position. 4. Check voltage between ECM terminal or @ and ground under the

~i3~ ECM

Torque converter clutch solenoid

INSPECTION START

ID cf6~H II

• • •


GID

II

following conditions.

115

iIJ

ID cf6~H

@> :

AIT models for Australia @: AlT models except for Europe and Israel, and Australia

SEF189R

Voltage: Accelerator pedal is depressed [Vehicle speed is above 58 km/h (36 MPH).] Battery voltage Accelerator pedal is fully released ApprOXimately OV NG

MEC279BA

EC-221

OK

CHECK COMPONENT (Torque converter clutch solenoid valve). Refer to "Electrical Components Inspection" in AT section. If NG, replace torque converter clutch solenoid valve. OK

INSPECTION END

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS @] Torque Converter Clutch Solenoid Valve (Cont'd) @

~i5 ~ SEF513Q

II

115

CHECK OUTPUT SIGNAL CIRCUIT. 1. Turn ignition switch "OFF". 2. Disconnect ECM harness connector. 3. Check harness continuity between ECM terminal (ill) or @ and terminal (D. Continuity should exist. " OK, check harness for short.

30

@ : AIT @:

NG --.--..

Check the fol/owing. • Harness connectors

@),
[;J

HCONNECTORII

models for Australia NT models except for Europe and Israel, and Australia

CHECK POWER SUPPLY. 1. Stop engine. 2. Disconnect torque converter clutch solenoid valve harness connector. 3. Turn ignition switch "ON". 4. Check voltage between terminal @ and ground. Voltage: Battery voltage OK

rilio ECM

1

I!J

SEF190R

NG --.--..

aD,@ • Harness connectors

@,@!) • Harness connectors

@),@D • Harness for open or short between ECM and torque converter clutch solenoid valve If NG, repair harness or connectors.

OK

CHECK COMPONENT (Torque converter clutch solenoid valve). Refer to "Electrical Components Inspection" in AT section. OK Disconnect and reconnect harness connectors in the circuit. Then retest. Trouble is not fixed. Check ECM pin terminals for damage or the connection of ECM harness connector. Reconnect ECM harness connector and retest.

.

INSPECTION END

EC-222


NG

~

Replace torque converter clutch solenoid valve.


ITEMS

MIL & Data Link Connectors LHD models

EC-MIL-01 IGNITION SWITCH ON or START

7.5A

IT]

FUSE BLOCK

Refer

to EL-POWER.

@: @:

Models with tachometer Models without tachometer *1"'@30 , @40 *2' .. @32 ,@ B

(JIB)

~

-:

I

-:

I~ G

COMBINATION METER

(MALFUNCTION INDICATOR LAMP)

1*.21

@) @

L+J G/B

ORIL

Detectable 1ine for DTC Non-detectable line for DTC

I L-iJ G/W

Li-J

GY/L

I~ GY/L It

l4-J G/R

I~

G/B

DATA LINK CONNECTOR

FOR CONSULT
~ B

~

G/W

~3~~~~~~ (t~1 II;~I 'D~I CONNECTORS)

(ffi])

_

ORIL @)

~ G/B

GY IL

~

~ G/W

G/R

ORIL

G/B

GY IL

G/W

G/R

I$~ (F~9)- - - - - - - - - - ~$J --~$~ --~$~ --~$I I

ORIL

u*iI LCHK R

I G/B

m SCI ~

GY IL

I

I

I

G/W

G/R

rrf5n

u=!4fl

SCI U

SCI Q

~ CHECK ECM (ECCS CONTROL MODULE)

CID


HEC058

EC-223

•

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS MIL & Data Link Connectors (Cont'd) RHO models

EC-MIL-02

Refer

FUSE BLOCK

to

EL-POWER.

@: @:

(JIB)

*1... @30 *2... @32 -:

i

-:

G

m

COMBINATION METER (MALFUNCTION INDICATOR LAMP)

~

1*.21

@

ORIL

1

Models Models

with tachometer without tachometer

, @40

,@

8

Detectable 1 ine for DTC Non-detectable line for DTC

I

DATA LINK CONNECTOR FOR CONSULT

.~

LiJ!4J G/B GYIL

~LiJ G/R

I~GY/LIt

~

G/W

~

tt 'DJOINT G/B

B

~

l

CONNECTOR-5

~~~

ORIL

@

G/B

G/R

GYIL

G/W

1~~{F~5----------~~~-~~~---------~qp~-~~1 ORIL

G/B

GYIL

G/R

I

I

I

I

ORIL

~

LCHK

R

G/R

G/W

I

G/B

GY/L

SCI

SCI

CHECK SCI

RX

TX

CL

mum

G/W

~wrn


em Refer to last page (Foldout page) .

~~ ~OR

HECOS9

EC-224

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS MIL & Data Link Connectors (Cont'd) GA 16DE for Australia


EC-MIL-01 7.5A

m

Refer to EL-POWER.

FUSE BLOCK

-:

(JIB)

-:

~

Detectable line for OTC Non-detectable line for OTC

• G

Y

m

1;01 COMBINATION METER (MALFUNCTION INDICATOR LAMP) @ 13•21

ORIL

1

I

DATA LINK CONNECTOR

FOR CONSULT ~

Li-JL4J

LiJ G!W

GY/L

G/B

I~GYIL It

tt 'D

l4J B

~

G/B

l

CONNECTOR-5 JOINT

lbi=U~~

ORIL

G/B

GYIL

G!W

1~~~F~~----------4~~-~~~---------4~1 ORIL c:E.ID

G/B

I

I

OR!L

G/B

!rOO

~~

LED-R

GYIL

G!W

I

GY!L

SCI

SCI

RX

TX

I

G!W

m

SCI CL

ECM

(ECCS CONTROL MODULE) (ill

@

Refer to last page (Foldout pagel.

W

~(@) ~OR

101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118

HEC086

EC-225

ENGINE AND EMISSION CONTROL OVERALL SYSTEM Circuit Diagram ~U

'"I"

U fH 3:f(f]0:
COOLING F~LAY-1

fH 3: (f]

--ttt

ZZ SO fH Z (!) H

,I'

0

"'"'

REf"

E 0

I

COOLING FAN RELAY-3

0

'"a

L

r Z(!) ru H 0: -' 0 oz~@ 8i1~ «

r=-1

f-

~

H>-

0.

A

-@---11'

OD~~O

::E
HO: f-O

~

@

CLc5

c--OZO: WWO f-(!)(f] -Z WXW IO(f)

W-' 0 "'0: fWZ >0 -'U UW >WW cll-> "'> 0::::>--1 0:0:-' O--l wo.> wo f-H 0:0 WZ >w Z-' 00 U(f]

ILH -'0
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...

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~

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I-

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8it ~

~

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U

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r

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;:::

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0

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III

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U
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u

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0

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wo:a:

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-'0 I-Ha: I-f-O OH(f) a:(/)Z IOW f-o.(/)

f-Z u.o
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r=-1

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COOLING FAN RELAY-2

~

r-

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0:

HEC001

EC-226

ENGINE AND EMISSION CONTROL OVERALL SYSTEM System Diagram ~

o

Q;

(/)

C

0

.0

C Ql

.3

o

0

C

::J

(/)~

o

.tl_

"

Ql.o

en .~ C

tl

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0

g'5

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Ql

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C

Ql CD C.

0

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~

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«

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tl Q;

~

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0 c.. .0

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C CD Ol

~ o

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<;; Ql

I

tl

~ ~ 0 (/) (/)

li1

c..

~

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~

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<;; 0

::J Ol

>-

Ctl

~ CD Ql

.c f-

Qi ::J

LL

SEF306R

EC-227

ENGINE AND EMISSION CONTROL OVERALL SYSTEM ECCS Component Parts Location IACV.air regulator

EGR valve EGRC-BPT

valve

Injector IACV.AAC valve IACV.FICD

Pressure regulator

solenoid valve


sensor Knock sensor

Heated oxygen sensor

Camshaft position sensor, ignition coil and power transistor built into distributor

SEF307R

EC-228

ENGINE AND EMISSION CONTROL OVERALL SYSTEM ECCS Component Parts Location (Cont'd) Engine coolant temperature

~

sensor

IACV.FICD

•

solenoid valve

IACV.air regulator

Knock sensor

SEF308R

EC-229

ENGINE AND EMISSION CONTROL OVERALL SYSTEM ECCS Component Parts Location (Cont'd)

L


Metal tip of ignition coil tower (Terminal of secondary coil circuit)

Terminal for ignition coil

NOTE: Power transistor, camshaft position sensor, and ignition coil have to be replaced as a distributor assembly. SEF853NA

EC-230

ENGINE AND EMISSION CONTROL OVERALL SYSTEM Vacuum Hose Drawing

EGR valve

Pressure

•

regulator

VIEW A

VIEW B /-

Vacuum gallery

A Throttle body ~

EGR valve

5 EGR valve & EVAP canister purge control solenoid valve

SEF309R

(1)

@ @ @

Pressure gallery

regulator

Air duct to vacuum

to vacuum

Throttle body to EGR valve & EVAP canister purge control solenoid valve

@

EGR valve & EVAP canister purge control solenoid valve vacuum gallery

to

EGR valve & EVAP canister purge control solenoid valve vacuum gallery

to

gallery

EVAP canister (vacuum vacuum gallery EVAP canister intake manifold

@

line) to

(purge line) to collector

(J)

EC-231

@

@ @ @

Intake manifold vacuum gallery

collector

to

EGRC-BPT

valve

to EGR tube

EGRC-BPT gallery

valve

to vacuum

EGR valve

to EGRC-BPT

valve

ENGINE AND EMISSION CONTROL OVERALL SYSTEM System Chart Camshaft position sensor


Fuel injection control

I

Idle air control system





IACV-AAC valve and IACV-FICD solenoid valve

~--..j

IACV-air regulator

Fuel pump relay

Fuel pump control

~-+

.


Heated oxygen sensor monitor & on-board diagnostic system

~-+

Malfunction indicator lamp (On the instrument panel)

EGR valve & EVAP canister purge control

1---+


t~ .....

Knock sensor

Battery voltage

I

I


I

~1Power transistor

I IACV-air regulator control

I

r

.


Ignition switch

Injectors

I Distributor ignition system


• I

& mixture ratio

I

.

~

.

Cooling fan control

.....

Front heated oxygen sensor heater

Front heated oxygen sensor heater control

Air conditioning cut control

EC-232

--

Cooling fan relay


I

ENGINE AND EMISSION BASIC CONTROL SYSTEM DESCRIPTION Multiport Fuel Injection (MFI) System INPUT/OUTPUT

SIGNAL LINE Engine speed and piston position





Front heated oxygen sensor


Neutral position/lnhibitor

I Vehicle speed sensor Ignition switch


Battery

BASIC MULTIPORT SYSTEM

switch


•

Density of oxygen in exhaust gas

Throttle position

ECM

Throttle valve idle position

(ECCS control module)

Gear position

Injector

I Vehicle speed Start signal


Battery voltage

VARIOUS FUEL INJECTION INCREASE/DECREASE COMPENSATION

FUEL INJECTION

The amount of fuel injected from the fuel injector is determined by the ECM. The ECM controls the length of time the valve remains open (injection pulse duration). The amount of fuel injected is a program value in the ECM memory. The program value is preset by engine operating conditions. These conditions are determined by input signals (for engine speed and intake air) from both the camshaft position sensor and the mass air flow sensor.

In addition, the amount of fuel injected is compensated to improve engine performance under various operating conditions as listed below. < Fuel increase> • During warm-up • When starting the engine • During acceleration • Hot-engine operation • When selector lever is changed from "N" to "0" (AfT models only) • High-load operation < Fuel decrease> • During deceleration

EC-233

ENGINE AND EMISSION BASIC CONTROL SYSTEM DESCRIPTION [][] Multiport Fuel Injection (MFI) System (Cont'd) MIXTURE RATIO FEEDBACK CONTROL (CLOSED LOOP CONTROL)

CLOSED LOOP CONTROL

Feedback signal

MEF025DD

The mixture ratio feedback system provides the best air-fuel mixture ratio for driveability and emission control. The three way catalyst can then better reduce CO, HC and NOx emissions. This system uses a heated oxygen sensor in the exhaust manifold to monitor if the engine operation is rich or lean. The ECM adjusts the injection pulse width according to the sensor voltage signal. For more information about the heated oxygen sensor, refer to EC-362. This maintains the mixture ratio within the range of stoichiometric (ideal air-fuel mixture). This stage is referred to as the closed loop control condition. OPEN LOOP CONTROL The open loop system condition refers to when the ECM detects any of the following conditions. Feedback control stops in order to maintain stabilized fuel combustion. • Deceleration and acceleration • High-load, high-speed operation • Engine idling • Malfunction of heated oxygen sensor or its circuit • Insufficient activation of heated oxygen sensor at low engine coolant temperature • High-engine coolant temperature • After shifting from "N" to "0" • During warm-up • When starting the engine MIXTURE RATIO SELF-LEARNING CONTROL The mixture ratio feedback control system monitors the mixture ratio signal transmitted from the heated oxygen sensor. This feedback signal is then sent to the ECM. The ECM controls the basic mixture ratio as close to the theoretical mixture ratio as possible. However, the basic mixture ratio is not necessarily controlled as originally designed. Both manufacturing differences (Le., mass air flow sensor hot wire) and characteristic changes during operation (Le., injector clogging) directly affect mixture ratio. Accordingly, the difference between the basic and theoretical mixture ratios is monitored in this system. This is then computed in terms of "injection pulse duration" to automatically compensate for the difference between the two ratios.

EC-234

ENGINE AND EMISSION BASIC CONTROL SYSTEM DESCRIPTION ~ Multiport Fuel Injection (MFI) System (Cont'd) ..--./ NO.1 cylinder

FUEL INJECTION TIMING

Injection pulse

---1 0/1

_

Two types of systems are used.

Sequential

rL

No.2 cylinder

~n~ _ ~n~ _

NO.3 cylinder

NO.4 cylinder ~


Fuel is injected into each cylinder during each engine cycle according to the firing order. This system is used when the engine is running.

----j

1 engine cycle

Sequential multiport fuel injection system

MEF522D

Simultaneous rL-

No. 2 cylinder jl

n n

No. 3 cylinder ]l

n

rL-

n

fL-.

No. 1 cylinder jl

NO.4 cylinder

D ~-

1 engine cycle

multipart fuel injection system

Fuel is injected simultaneously into all four cylinders twice each engine cycle. In other words, pulse signals of the same width are simultaneously transmitted from the ECM. The four injectors will then receive the signals two times for each engine cycle. This system is used when the engine is being started and/or if the fail-safe system (CPU) is operating.

rL-

---1

Simultaneous multi port fuel injection system

FUEL SHUT-OFF MEF523D

Fuel to each cylinder is cut off during deceleration of the engine at excessively high speeds.

or operation

Distributor Ignition (DI) System INPUT/OUTPUT

SIGNAL LINE



Amount of intake air Mass air flow sensor Engine coolant temperature


Throttle position


I Vehicle speed sensor Ignition switch

Knock sensor


Battery

I

Throttle valve idle position Vehicle speed

Start signal

Engine knocking

Gear position

Battery voltage

EC-235


Power transistor

•

ENGINE AND EMISSION BASIC CONTROL SYSTEM DESCRIPTION Distributor Ignition (01) System (Cont'd) SYSTEM DESCRIPTION

Tp (msec) 1.75 ~

A

1.50

.~

3l

:; a.

1.25

c: 1.00 .Q

~ 0.75

E 600

N 1,000 1,400 1,800 2,200 Engine speed (rpm) SEF742M

The ignition timing is controlled by the ECM to maintain the best air-fuel ratio for every running condition of the engine. The ignition timing data is stored in the ECM. This data forms the map shown. The ECM receives information such as the injection pulse width and camshaft position sensor signal. Computing this information, ignition signals are transmitted to the power transistor. e.g., N: 1,800 rpm, Tp: 1.50 msec AOBTDC During the following conditions, the ignition timing is revised by the ECM according to the other data stored in the ECM. • At starting • During warm-up • At idle • Hot engine operation • During acceleration The knock sensor retard system is designed only for emergencies. The basic ignition timing is programmed within the antiknocking zone, if recommended fuel is used under dry conditions. The retard system does not operate under normal driving conditions. If engine knocking occurs, the knock sensor monitors the condition. The signal is transmitted to the ECM (ECCScontrol module). The ECM retards the ignition timing to eliminate the k.nocking condition.

Air Conditioning Cut Control INPUT/OUTPUT SIGNAL LINE Air conditioner switch




Ignition switch

Air conditioner "ON" signal

Throttle valve opening angle

Engine speed




Start signal

SYSTEM DESCRIPTION This system improves acceleration when the air conditioner is used. When the accelerator pedal is fully depressed, the air conditioner is turned off for a few seconds. When engine coolant temperature becomes excessively high, the air conditioner is turned off. This continues until the coolant temperature returns to normal.

EC-236

ENGINE AND EMISSION BASIC CONTROL SYSTEM DESCRIPTION Fuel Cut Control (at no load & high engine speed) INPUT/OUTPUT

SIGNAL LINE Vehicle speed


Neutral position/lnhibitor

switch

Throllle position sensor


Neutral position

Throllle position


Injectors


. Camshaft position sensor

Engine speed

If the engine speed is above 3,950 rpm with no load (for example, in neutral and engine speed over 3,950 rpm) fuel will be cut off after some time. The exact time when the fuel is cut off varies based on engine speed. Fuel cut will operate until the engine speed reaches 1,150 rpm, then fuel cut is cancelled.

NOTE: This function is different than deceleration control listed under "Multipart Fuel Injection (MFI) System" on EC-233.

EC-237

•

EVAPORATIVE EMISSION SYSTEM Description EGR valve & EVAP canister purge control solenoid valve

-

Vapor vent line

t

-

Fuel filler cap with vacuum relief valve Fuel tank

EVAP canister

yAir ..

Fuel vapor MEF609DC

The evaporative emission system is used to reduce hydrocarbons emitted into the atmosphere from the fuel system. This reduction of hydrocarbons is accomplished by activated charcoals in the EVAP canister. The fuel vapor from sealed fuel tank is led into the EVAP canister when the engine is off. The fuel vapor is then stored in the EVAP canister. The EVAP canister retains the fuel vapor until the EVAP canister is purged by air. When the engine is running, the air is drawn through the bottom of the EVAP canister. The fuel vapor will then be led to the intake manifold. When the engine runs at idle, the purge control valve is closed. Only a small amount of vapor flows into the intake manifold through the constant purge orifice. As the engine speed increases and the throttle vacuum rises, the purge control valve opens. The vapor is sucked through both main purge and .constant purge orifices.

Inspection EVAP CANISTER Check EVAP canister as follows: 1. Blow air in port @ and ensure that there is no leakage. 2. • Apply vacuum to port @. [Approximately -13.3 to -20.0 kPa (-133 to -200 mbar, -100 to -150 mmHg, -3.94 to -5.91 inHg)] • Cover port CID with hand. • Blow air in port @ and ensure free flow out of port @. SEF312N

EC-238

EVAPORATIVE EMISSION SYSTEM Inspection (Conl'd) FUEL CHECK VALVE +

Check valve operation

0:>

Fuel lank side

1.

QAir ..

Fuel vapor

..

2.

EVAP canister side

3.

Blow air through connector on fuel tank side. A considerable resistance should be felt and a portion of air flow should be directed toward the EVAP canister side . Blow air through connector on EVAP canister side. Air flow should be smoothly directed toward fuel tank side. If fuel check valve is suspected of not properly functioning in steps 1 and 2 above, replace it.

MEC744B

FUEL TANK VACUUM

1. Wipe clean valve housing. Suck air through the cap. A slight resistance accompanied by valve clicks indicates that valve A is in good mechanical condition. Note also that, by further sucking air, the resistance should disappear with valve clicks. 3. Blow air on fuel tank side and ensure that continuity of air passage exists through valve B. 4. If valve is clogged or if no resistance is felt, replace cap as an assembly.

4.

Fuel tank side

RELIEF VALVE

SEF427N

EC-239

•

POSITIVE CRANKCASE VENTILATION Description This system returns blow-by gas to the intake manifold collector. The positive crankcase ventilation (PCV) valve is provided to conduct crankcase blow-by gas to the intake manifold. During partial throttle operation of the engine, the intake manifold sucks the blow-by gas through the pev valve. Normally, the capacity of the valve is sufficient to handle any blow-by and a small amount of ventilating air. The ventilating air is then drawn from the air duct

into the crankcase. In this process the air passes through the hose connecting air inlet tubes to rocker cover. Under full-throttle condition, the manifold vacuum is insufficient to draw the blow-by flow through the valve. The flow goes through the hose connection in the reverse direction. On vehicles with an excessively high blow-by, the valve does not meet the requirement. This is because some of the flow will go through the hose connection to the intake manifold collector under all conditions.

PCV valve operation Oil separator

~~

Baffle plate

q ..

ct>

Engine not running or backfiring

Idling or decelerating

Fresh air Blow-by gas

-~--

Blow-by gas during high-load operation

Cruising

.0

.~

Acceleration or high load

AEC923

Inspection PCV (Positive Crankcase

Ventilation)

With engine running at idle, remove PCV valve from rocker cover. A properly working valve makes a hissing noise as air passes through it. A strong vacuum should be felt immediately when a finger is placed over the valve inlet.

AEC911

VENTILATION

HOSE

1. Check hoses and hose connections for leaks. 2. Disconnect all hoses and clean with compressed hose cannot be freed of obstructions, replace.

ET277

EC-240

air. If any

BASIC SERVICE PROCEDURE

~U5e

Fuel Pressure Release

box

Before disconnecting fuel line, release fuel pressure from fuel line to eliminate danger. ~ 1. Turn ignition switch "ON". \J!I} 2. Perform "FUEL PRESSURE RELEASE" in "WORK SUPPORT" mode with CONSULT. 3. Start engine. 4. After engine stalls, crank it two or three times to release all fuel pressure. 5. Turn ignition switch "OFF".

~~~

~11~1-

Data link connector ~"

for CONSULT

t=====/ • FUEL PRES RELEASE.

•

D

FUEL PUMP Will STOP BY TOUCHING START DURING IDLE. CRANK A FEW TIMES AFTER ENGINE STALL

---S-T~-RT-SEF823K

Remove fuse for fuel @ ~: Start engine. 3. 4.

pump.

After engine stalls, crank it two or three times to release all fuel pressure. Turn ignition switch off and reconnect fuel pump fuse.

SEF921P

Fuel Pressure Check • • • • • 1. 2. 3. 4. 5.

When reconnecting fuel line, always use new clamps. Make sure that clamp screw does not contact adjacent parts. Use a torque driver to tighten clamps. Use Pressure Gauge to check fuel pressure. Do not perform fuel pressure check with system operating. Fuel pressure gauge may indicate false readings. Release fuel pressure to zero. Disconnect fuel hose between fuel filter and fuel tube (engine side). Install pressure gauge between fuel filter and fuel tube. Start engine and check for fuel leakage. Read the indication of fuel pressure gauge. At idling: With vacuum hose connected Approximately 235 kPa (2.35 bar, 2.4 kg/cm2, 34 psi) With vacuum hose disconnected Approximately 294 kPa (2.94 bar, 3.0 kg/cm2, 43 psi) If results are unsatisfactory, perform Fuel Pressure Regulator Check.

SEF034K

EC-241

BASIC SERVICE PROCEDURE Fuel Pressure Regulator Check Vacuum

Fuel pressure

.... LTo

pressure regulator

1. Stop engine and disconnect fuel pressure regulator vacuum hose from intake manifold. 2. Plug intake manifold with a rubber cap. 3. Connect variable vacuum source to fuel pressure regulator. 4. Start engine and read indication of fuel pressure gauge as vacuum is changed. Fuel pressure should decrease as vacuum increases. are unsatisfactory, replace fuel pressure regulator.

If results

SEF718B

Injector Removal and Installation 1. 2. 3. 4. 5.

Release fuel pressure to zero. Disconnect vacuum hose from pressure regulator. Disconnect fuel hoses from fuel tube assembly. Disconnect injector harness connectors. Remove injectors with fuel tube assembly.

• •

Push injector tail piece. Do not pull on the connector.

'nsu'a,or~7

a-ring~1~OJ'

~>

~

InsUlalor~7

Om~riJ$

_. ~lnjeCIOr SEF310R

Insulator

6. Install injectors. • Clean exterior of injector tail piece. • Use new O-rings.

kJ 11+-

1

'I"

•. a-ring

.

~

FuellUbe~i assembly

,

'.

I

Locale plate on this side.

.

~'nsulator I

SEF616N

7. Install injectors with fuel tube assembly to intake manifold. 8. Install fuel hoses to fuel tube assembly. 9. Reinstall any parts removed in reverse order of removal. CAUTION: After properly connecting fuel hose to injector assembly, check connection for fuel leakage.

MEC710B

EC-242

and fuel tube

BASIC SERVICE PROCEDURE Idle Speedllgnition Adjustment

•

PREPARATION •

Make sure that the following parts are in good order. (1) Battery (2) Ignition system (3) Engine oil and coolant levels (4) Fuses (5) ECM harness connector (6) Vacuum hoses (7) Air intake system (Oil filler cap, oil level gauge, etc.) (8) Fuel pressure (9) Engine compression (10) Throttle valve

• • • • •

Timinglldle

Mixture Ratio

On models equipped with air conditioner, checks should be carried out while the air conditioner is "OFF". On models equipped with automatic transaxle, when checking idle speed, ignition timing and mixture ratio, checks should be carried out while shift lever is in "N" position. When measuring "CO" percentage, insert probe more than 40 cm (15.7 in) into tail pipe. Turn off headlamps, heater blower, rear defogger. Keep front wheels pointed straight ahead. Make the check after the cooling fan has stopped.

Overall inspection sequence INSPECTION

Perform diagnostic test mode II (Self-diagnostic results).

NG

Repair or replace.

NG

Check heated oxygen sensor harness.

OK

Check & adjust ignition timing.

Check & adjust idle speed.

Check heated oxygen sensor function. OK

NG


OK


NG

Check heated oxygen sensor

OK

Check CO%. NG

Check emission control parts and repair or replace if necessary.

INSPECTION END

EC-243

function.

OK

•

BASIC SERVICE PROCEDURE Idle Speedllgnition Timinglldle Adjustment (Cont'd)

Em Mixture Ratio

START

Visually check the following: • Air cleaner clogging • Hoses and duct for leaks • Electrical connectors • Gasket (intake manifold, cylinder head, exhaust system) • Throttle valve and throttle position sensor operation SEF455Q

\ -

'~,,/

m

I /

Start engine and warm it up until engine coolant temperature indicator points to the middle of gauge. Ensure engine speed stays below 1,000 rpm.

CHECK-

,,/

1

........

/

I \

Open engine hood and run engine at about 2,000 rpm for about 2 minutes under no-load.


Ii] Perform the Diagnostic Test Mode 1\ (Self-diagnostic results). OK

~NG Repair or replace components as necessary.

[!J SEF248F

Ii]

•

IGN TIMING ADJ.

D

IGNITION TIMING FEEDBACK CONTROL WILL BE HELD BY TOUCHING START. AFTER DOING SO, ADJUST IGNITION TIMING WITH A TIMING LIGHT BY TURNING THE CAMSHAFT POSITION SENSOR.

I

START

Run engine at about 2,000 rpm for about 2 minutes under no-load. Rev engine two or three times under no-load, then run engine at idle speed for about 1 minute .

li]1!I

I

00 00

1. Select "IGNITION TIMING ADJ" in WORK SUPPORT mode. 2. Touch "START" . . OR 1. Turn off engine and disconnect throttle position sensor harness connector. 2. Start engine.

SEF546N

Rev engine (2,000 - 3,000 rpm) 2 or 3 times under no-load, then run engine at idle speed.

t @

Throttle position sensor harness connector SEF785KA

EC-244

[]K]


Ii

Mixture Ratio

@

Ii

L

Check ignition timing with a timing light. M/T: 15°::l:2° BTDC A/T: 15°::l:2° BTDC (in UN" position) NG Adjust ignition timing to the specified value by turning distributor after loosening bolts which secure distributor.

AEC804

•

0

IGN TIMING ADJ.

IGNITION TIMING FEEDBACK CONTROL WILL BE HELD BY TOUCHING START AFTER DOING SO, ADJUST IGNITION TIMING WITH A TIMING LIGHT BY TURNING THE CAMSHAFT POSITION SENSOR

M/T: 15°::l:2° BTDC A/T: 15°::l:2° BTDC (in UN" position)

.

@

~IIJ

00

START

@

SEF546N

~ 1. Select "IGN TIMING ADJ" in "WORK SUPPORT" mode. 2. Touch "START". OR 1. Stop engine and disconnect throttle position sensor harness connector. 2. Start engine.

0 Check idle speed.

@

Read idle speed in "IGN TIMING ADJ" in "WORK SUPPORT" mode. OR Check idle speed.

@

M/T: 750::l:50 rprn A/T: 750::l:50 rprn (in UN" position) OK

o

• I- -

IGN TIMING ADJ.

0

CONDITION SETIING -

-

IGN/T FEEDBACK

NG Rev engine (2,000 - 3,000 rpm) 2 or 3 times under no-load, then run engine at idle speed.

1.1

HOLD

Adjust idle speed by turning idle speed adjusting screw.

===

===

MONITOR CMPS.RPM (REF) 762rpm IGN TIMING 15BTDC CLOSED TH/POS ON

M/T: 750::l:50 rpm A/T: 750::l:50 rprn (in UN" position)

SEF548N

II

00 @

Touch "BACK". OR 1. Turn off engine and connect throttle position sensor harness connector. 2. Start engine.

L /

/

Rev engine (2,000 - 3,000 rpm) 2 or 3 times under no-load, then run engine at idle speed.

I

-.

Throttle position sensorharness connector / I \

\

SEF788LA

EC-245

•


mJ Mixture Ratio

@

1

II Check idle speed.

00 SEF913J

II

~MONITOR CAS-RPM

~NO

0

FAIL

(REF)

@

Read idle speed in "DATA MONITOR" mode with CONSULT. OR Check idle speed.

M/T: 800:l: 50 rpm A/T: 800:l: 50 rpm (in uN" position)

825rpm

~NG

OK

Check IACV-AAC valve and replace if necessary.

~ Check IACV-AAC valve harness and repair if necessary.

RECORD SEF135K

1<

MONITOR

1<

NO FAIL

~ Check ECM function- by substituting another known good ECM.

D

CMPS.RPM (REF)

2000rpm

MIR FIC MNT

RICH

- ECM may be the cau se of a pro blem, but this is r arely the case

1II111[!]

(j) I

RECORD

MEC7118

~ ~~r ~~V @~ -~

-

Data link connector for CONSULT (Connect CHK and IGN terminals with a suitable harness)

SEF909P

\ -

I /

(j)

1. See "M/R FIC MNT" in "DATA MONITOR" mode. 2. Run engine at about 2,000 rpm for about 2 minutes under no-load. 3. Maintain engine at 2,000 rpm under no-load (engine is warmed up sufficiently). Check that the monitor fluctuates between "LEAN" and "RICH" more than 5 times during 10 seconds. 1 cycle: RICH -> LEAN -> RICH 2 cycles: RICH -> LEAN -> RICH ->LEAN -> RICH OR 1. Set "Heated oxygen sensor monitor" in the Diagnostic Test Mode II. (See page EC-252.) 2. Run engine at about 2,000 rpm for about 2 minutes under no-load. 3. Maintain engine at 2,000 rpm under no-load. Check that the malfunction indicator lamp goes on and off more than 5 times during 10 seconds.

......... ~/"

CHECK-

/

~OK END

......

/

I \ SEF051P

EC-246

NG

~@

BASIC SERVICE PROCEDURE Idle Speed/Ignition Timing/Idle Adjustment (Cont'd) Heated oxygen sensor harness connector

[][] Mixture Ratio

@

Check heated oxygen sensor harness: 1. Turn off engine and disconnect battery ground cable.

MEF031DB

4. Check for continuity between terminal @ of ECM harness connector and body ground.

~io II

ECM

2. Disconnect ECM harness connector from ECM. 3. Disconnect heated oxygen sensor harness connector. Then connect harness side terminal for heated oxygen sensor to ground with a jumper wire.

Continuity exists Continuity does not exist

TIcoNNECTORl1 19

LEn

OK


MEC712B

•

Connect ECM harness connector to ECM.

0

ACTIVE TEST.

COOLANT TEMP

20°C

1. Connect battery ground cable. 2. Select "ENG COOLANT TEMP" in "ACTIVE TEST" mode. 3. Set "COOLANT TEMP" to 20"C (68"F) by touching "Qu" and "Qd" and "UP", "DWN".

===MONITOR=== CMPS.RPM (REF) INJ PULSE IGN TIMING

OK NG

Orpm O.7msec

5BTDC

OR

Disconnect engine coolant temperature sensor harness connector. 2. Connect a resistor (2.5 kQ) between termi-

AEC681

DISCONNFCT

10

nals of engine coolant temperature sensor harness connector. 3. Connect battery ground cable.

Engine coolant temperature sensor harness connector

~

00 '--

Ii ~ 2.5 k 0 resistor A_E_C6_8-l2

Start engine and warm it up until engine coolant temperature indicator points to middle of gauge. (Be sure to start engine after setting "COOLANT TEMP" or installing a 2.5 kQ resistor.)

Ii

SEF455Q

EC-247

•

BASIC SERVICE PROCEDURE Idle Speed/Ignition Timing/ldle Adjustment (Cont'd)

mJ Mixture Ratio

CID

1

m

Rev engine two or three times under no-load, then run engine at idle speed.

m SEF248F

Check "CO"%. Idle CO: Less than 10% and engine runs smoothly. After checking CO%. 1. Touch "BACK".

00 (j) SEF913J

*

MONITOR

*

NO FAIL

D

CMPS.RPM (REF)

2000rpm

MIR F/C MNT

RICH

OR 1. Disconnect the resistor from terminals of engine coolant temperature sensor harness connector. 2. Connect engine coolant temperature sensor harness connector to engine coolant temperature sensor.

1

NG

0K


fa

an

00 I

RECORD

MEC7118

~~:?_-~

.

w=jr

~~~~"v

~~ -~

(j)

Data link connector for CONSULT (Connect CHK and IGN terminals with a suitable harness)

SEF909P

1. See "MIR FIC MNT" in "Data monitor" mode. 2. Maintain engine at 2,000 rpm under no-load (engine is warmed up sufficiently.). Check that the monitor fluctuates between "LEAN" and "RICH" more than 5 times during 10 seconds. 1 cycle: RICH --> LEAN -. RICH 2 cycles: RICH --> LEAN --> RICH -->LEAN --> RICH OR 1. Set "Heated oxygen sensor monitor" in the Diagnostic Test Mode II. (Refef'to EC-253) 2. Maintain engine at 2,000 rpm under no-load. Check that the malfunction indicator lamp goes ON and OFF more than 5 times during 10 seconds.

I NG \ -

......... ~/'

I / CHECK-

/

.......

/

I \ SEF051P

EC-248

OK

,$

BASIC SERVICE PROCEDURE Idle Speedllgnition Timinglldle Adjustment (Cont'd)

[]K] Mixture Ratio

CD

1 Connect heated oxygen sensor harness connector to heated oxygen sensor.

Check fuel pressure regulator. (Refer to EC-242.)

Check mass air flow sensor and its circuit. Refer to TROUBLE DIAGNOSIS FOR DTC 12. (Refer to EC-293.)

Check injector and its circuit. Refer to TROUBLE DIAGNOSIS FOR NON DETECTABLE ITEMS. (Refer to EC-324.) Clean or replace if necessary.

Check engine coolant temperature sensor and its circuit. Refer to TROUBLE DIAGNOSIS FOR DTC 13. (Refer to EC-297.)

Check ECM function' known good ECM

by substituting

another

•. ECM may be the c ause of a problem, but It1IS

EC-249

IS

rarely the case.

•

ON-BOARD DIAGNOSTIC SYSTEM DESCRIPTION Malfunction Indicator lamp (Mil)

\ -

'~/'

1. The malfunction indicator lamp will light up when the ignition switch is turned ON without the engine running. This is a bulb check. • If the malfunction indicator lamp does not light up, refer to EL section ("WARNING LAMPS AND CHIME") or see

I / CHECK-

/

EC-370.

.......

/

I \

2. When the engine is started, the malfunction indicator lamp should go off. SEF051P

Diagnostic Test Mode I

Condition Engine stopped Ignition switch in "ON" position

0 Engine running

ID

~

EC-250

BULB CHECK

MALFUNCTION WARNING

Diagnostic Test Mode II


HEATED OXYGEN SENSOR MONITOR

ON-BOARD DIAGNOSTIC SYSTEM DESCRIPTION Malfunction Indicator Lamp (MIL) (Cont'd) HOW TO SWITCH DIAGNOSTIC

~

Turn

ignition

~

start

engine.)

switch

"ON".

TEST MODES

(Do not

~

Diagnostic

Test Mode

I-

BULB

CHECK

Diagnostic I

1

Start

engine.

Test

MALFUNCTION

Mode

I -

WARNING

•

~yW~r ~-~


Wait at least

2 seconds.

CHK

IGN

~J/~l ~-~ Data link connector for CONSULT (Disconnect CHK and IGN terminals with a suitable harness.)

DIAGNOSTIC -

TEST MODE

SELF-DIAGNOSTIC

II

Diagnostic

RESULTS

-

:~~-~ l~mv f!i~ Start

~

engine.

Test

Mode

HEATED

OXYGEN

SENSOR

MONITOR

II

w;ir

-~


Wait at least

2 seconds.

~

• SWitching the diagnostic test mode is not possible when the engine is running. • When ignition switch is turned off during diagnosis, power to ECM will drop after approx. 1 second. The diagnosis will automatically return to Diagnostic Test Mode I.

~/~~N ~-~

Data link connector for CONSULT (Disconnect CHK and IGN terminals with a suitable harness.)

EC-251

ON-BOARD DIAGNOSTIC SYSTEM DESCRIPTION Malfunction Indicator Lamp (MIL) (Cont'd) DIAGNOSTIC TEST MODE I-BULB

~

CHECK

In this mode, the MALFUNCTION INDICATOR LAMP on the instrument panel should stay ON. If it remains OFF, check the bulb. Refer to EL section ("WARNING LAMPS AND CHIME") or see EC-370.

DIAGNOSTIC TEST MODE I-MALFUNCTION

WARNING


•

Condition

ON

Engine coolant temperature is malfunctioning.

OFF

No malfunction.

sensor circuit malfunction

is detected, or the ECM's CPU

These Diagnostic Trouble Code Numbers are clarified in Diagnostic Test Mode II (SELF-DIAGNOSTIC RESULTS).

DIAGNOSTIC TEST MODE II-SELF-DIAGNOSTIC

RESULTS

In this mode, a diagnostic trouble code is indicated by the number of blinks of the MALFUNCTION INDICATOR LAMP as shown below. Example: Diagnostic trouble code No. 12 and No. 43 0.6

0.3

0.3

0.6

1111

ON

OFF

~ 0.9

0.3

--I~ 2.1

Unit: second

0.9

0.6



AEC490

Long (0.6 second) blinking indicates the number of ten digits, and short (0.3 second) blinking indicates the number of single digits. For example, the malfunction indicator lamp blinks 4 times for about 2.5 seconds (0.6 sec x 4 times) and then it blinks three times for about 1 second (0.3 sec x 3 times). This indicates the DTC "43" and refers to the malfunction of the throttle position sensor. In this way, all the detected malfunctions are classified by their diagnostic trouble code numbers. The DTC "55" refers to no malfunction. (See DIAGNOSTIC TROUBLE CODE CHART, refer to EC-268.)

HOW TO ERASE DIAGNOSTIC TEST MODE II (Self-diagnostic

results)

The diagnostic trouble code can be erased from the backup memory in the ECM when the diagnostic test mode is changed from Diagnostic Test Mode II to Diagnostic Test Mode I. (Refer to "HOW TO SWITCH DIAGNOSTIC TEST MODES" on previous page.) • If the battery terminal is disconnected, the diagnostic trouble code will be lost from the backup memory within 24 hours. • Be careful not to erase the stored memory before starting- trouble diagnoses. • If the MIL blinks or "NATS MALFUNCTION" is displayed on • SELF-DIAG RESULTS. 0 "SELF-OIAG RESULTS" screen, perform self-diagnostic FAILURE DETECTED TIME results mode with CONSULT using NATS program card NATS MALFUNCTION 0 (NATS-E940). Refer to EL section. • Confirm no self-diagnostic results of NATS is displayed before touching "ERASE" in "SELF-DiAG RESULTS" mode with CONSULT. • When replacing ECM, inltialisation of NATS V2.0 system and registration of all NATS V2.0 Ignition key IDs must be carried out with CONSULT using NATS program card (NATSPRINT ERASE E940). SEF288Q Therefore, be sure to receive all keys from vehicle owner. Regarding the procedures of NATS initialisation and NATS ignition key 10 registration, refer to CONSULT operation manual, NATS V2.0.

I

II

I

EC-252

ON-BOARD DIAGNOSTIC SYSTEM DESCRIPTION Malfunction Indicator lamp (Mil) (Cont'd) DIAGNOSTIC TEST MODE II-HEATED

[]K]

OXYGEN SENSOR MONITOR

In this mode, the MALFUNCTION INDICATOR LAMP displays the condition of the fuel mixture (lean or rich) which is monitored by the heated oxygen sensor. MALFUNCTION INDICATOR LAMP

Fuel mixture condition in the exhaust gas

ON

Lean

OFF

Rich

Remains ON or OFF

Any condition

Air fuel ratio feedback control condition Closed loop system Open loop system

To check the heated oxygen sensor function, start engine in Diagnostic Test Mode II. Then warm it up until engine coolant temperature indicator points to middle of gauge. Next run engine at about 2,000 rpm for about 2 minutes under no-load conditions. Make sure that the • MALFUNCTION INDICATOR LAMP comes ON more than 5 times within 10 seconds with engine running at 2,000 rpm under no-load.

EC-253

ON-BOARD DIAGNOSTIC SYSTEM DESCRIPTION CONSULT CONSULT INSPECTION

PROCEDURE

1. 2.

Turn off ignition switch. Connect "CONSULT" to Data link connector for CONSULT. (Data link connector for CONSULT is located behind the fuse box cover.)

3. 4.

Turn on ignition switch. Touch "START". Program card AE930: For Australia

5.

Touch "ENGINE",

for CONSULT

t======/ NISSAN

+:

CONSULT EE940

+

~

START

I

I

SUB MODE

I

I

SEF253Q

~

SELECT~S=Y=S=TE=M====

ENGINE

SEF895K

~

SELECT

DIAG

MODE

[i]

WORK SUPPORT SELF-DIAG

6.

Perform each diagnostic test mode according to each service procedure. For further information, see the CONSULT Operation Manual.

RESULTS

DATA MONITOR ACTIVE TEST ECM PART NUMBER FUNCTION

TEST SEF136P

EC-254

ON-BOARD DIAGNOSTIC SYSTEM DESCRIPTION CONSULT (Coni' d) ECCS COMPONENT

PARTS/CONTROL

SYSTEMS APPLICATION DIAGNOSTIC TEST MODE

Item

WORK SUPPORT

SELF. DlAG. NOSTIC RESULTS

DATA MONITOR


X

X


X

X

X

X


sensor

ACTIVE TEST

FUNCTION TEST

X


X

X


X

X

X

X

Ignition switch (start signal)

X

X

Air conditioner

X


X

X

INPUT X

Knock sensor lJ)

~ a: < 0~ z w z

switch

X

X


X

X

0 0

Battery voltage

X

lJ)

Injectors

X

X

X

X

X

X

X

X

X

X

X

X

Cooling fan

X

X

X


X

X

X

Park/Neutral

0

0-

:!

0 0

w

position switch

Power transistor

(Iynition timing)

X

IACV-AAC valve OUTPUT

Air conditioner

X

X

relay

Fuel pump relay

X (Ignition signal)

X

X: Applicable

EC-255

•

ON-BOARD DIAGNOSTIC SYSTEM DESCRIPTION CONSULT (Cont'd) FUNCTION Diagnostic test mode

A technician can adjust some devices faster and more accurately by following indications on CONSULT.

Work support

Self-diagnostic

Function

results

Self-diagnostic results can be read and erased quickly.

Data monitor

Input/Output data in the ECM can be read.

Active test

CONSULT drives some actuators apart from the ECM's and also shifts some parameters in a specified range.

ECM part numbers

ECM part numbers can be read.

Function test

Conducted by CONSULT instead of a technician to determine whether each system is "OK" or "NG".

WORK SUPPORT MODE WORK ITEM

CONDITION

USAGE

THRTL POS SEN ADJ

CHECK THE THROTTLE POSITION SENSOR SIGNAL. ADJUST IT TO THE SPECIFIED VALUE BY ROTATING THE SENSOR BODY UNDER THE FOLLOWING CONDITIONS . • IGN SW "ON" • ENG NOT RUNNING • ACC PEDAL NOT PRESSED

When adjusting throttle position sensor initial position

IGNITION TIMING ADJ

• IGNITION TIMING FEEDBACK CONTROL WILL BE

When adjusting timing

initial ignition

HELD BY TOUCHING "START". AFTER DOING SO, ADJUST IGNITION TIMING WITH A TIMING LIGHT BY TURNING THE CAMSHAFT POSITION SENSOR. IACV-AAC VALVE ADJ

SET ENGINE SPEED AT THE SPECIFIED VALUE UNDER THE FOLLOWING CONDITIONS . • ENGINE WARMED UP • NO-LOAD

When adjusting

idle speed

FUEL PRESSURE RELEASE

• FUEL PUMP WILL STOP BY TOUCHING "START" DURING IDLING.

When releasing from fuel line

fuel pressure

CRANK A FEW TIMES AFTER ENGINE STALLS

EC-256

ON-BOARD DIAGNOSTIC SYSTEM DESCRIPTION CONSULT (Cont'd) SELF-DIAGNOSTIC

MODE

Regarding items detected in "SELF-DiAG Chart". (See page EC-268.)

DATA MONITOR Monitored item [Unit]

Main signals

CMPS.RPM (REF) [rpm]

0

0

0

0

COOLAN TEMP/S rOC]or rF]

02 SEN [V]

0

0

0

0

0

VHCL SPEED SE [km/h] or [mph]

SATTERY VOLT [V]

THRTL POS SEN [V]

0

0

0

0 0

0 0

Code (DTC)

Remarks

• Indicates the engine speed computed from the REF signal (180' signal) of

• Accuracy becomes poor if engine speed drops below the idle rpm. • If the signal is interrupted while the engine is running, an abnormal value may be indicated .

the camshaft position sensor.

• The sig~al voltage of the mass air flow sensor is displayed.

• When the engine is stopped, a certain value is indicated .

• The engine coolant temperature (determined by the signal voltage of the engine coolant temperature sensor) is displayed.

• When the engine coolant temperature sensor is open or short-circuited,

0

0

ECM enters fail-safe mode. The engine coolant temperature determined by the ECM is displayed .

• The signal voltage of the heated oxygen sensor is displayed.

"rich", and control is being affected toward a leaner mixture. LEAN ... means the mixture became "lean", and control is being affected toward a rich mixture .

• After turning ON the ignition switch, "RICH" is displayed until air-fuel mixture ratio feedback control begins. • When the air-fuel ratio feedback is clamped, the value just before the clamping is displayed continuously.

• The vehicle speed computed from the vehicle speed sensor signal is displayed . • The power supply voltage of ECM is displayed . • The throttle position sensor signal voltage is displayed. • Indicates [ON/OFF] condition from the

• After starting the engine, [OFF] is displayed regardless of the starter signal.

starter signal.

• Indicates the closed throttle position

CLSD THLIPOSI [ON/OFF]

0 NOTE: Any monitored matically.

Trouble

Description

• Display of heated oxygen sensor signal during air-fuel ratio feedback control: RICH ... means the mixture became

M/R F/C MNT [RICH/LEAN]

START SIGNAL [ON/OFF]

mode, refer to "Diagnostic

MODE ECM input signals

MAS AIR/FL SE [V]

RESULTS"

0

[ON/OFF] determined by the throttle position sensor signal. ON: Closed throttle position OFF: Other than closed throttle position

item that does not match the vehicle

being diagnosed

EC-257

is deleted from the display auto-

•

ON-BOARD DIAGNOSTIC SYSTEM DESCRIPTION CONSULT (Conl'd) Monitored item [Unit] AIR COND SIG [ON/OFF] PIN POSI SW [ON/OFF] PW/ST SIGNAL [ON/OFF]

INJ PULSE [msec]

IGN TIMING [BTDC]

ECM input signals

Main signals

0

0

• Indicates [ON/OFF] condition of the air conditioner switch as determined by the air conditioning signal.

0

0

• Indicates [ON/OFF] condition from the park/neutral position switch signal.

0

• Indicates [ON/OFF] condition of the power steering oil pressure switch determined by the power steering oil pressure signal.

0

• Indicates the actual fuel injection pulse width compensated by ECM according to the input signals.

0

• Indicates the ignition timing computed by ECM according to the input signals.

0

• Indicates the idle air control valve (AAC valve) control value computed by ECM according to the input signals.

0

IACV-AACIV [%]

A/F ALPHA [%J

0 AIR COND RLY [ON/OFF] FUEL PUMP RLY [ON/OFFJ

Description

• Indicates the mean value of the airfuel ratio feedback correction factor per cycle.

0

• Indicates the air conditioner relay control condition (determined by ECM according to the input signal).

0

• Indicates the fuel pump relay control condition determined by ECM according to the input signals.

0

• Indicates the control condition of the cooling fans (determined by ECM according to the input signal). HI ... High speed operation LOW ... Low speed operation OFF ... Stopped

0

• Indicates the control condition of the EGR valve & EVAP canister Purge control solenoid valve (determined by ECM according to the input signal). ON ... EGR and EVAP canister purge operation cut-off OFF ... EGR and EVAP canister purge operation not cut-off

COOLING FAN [HI/LOW/OFFJ

EGRC SOLIV [ON/OFFJ

VOLTAGE [V]

• Voltage measured by the voltage probe.

PULSE [msec] or [Hz] or [%]

• Pulse width, frequency or duty cycle measured by the pulse probe.

EC-258

Remarks

• When the engine is stopped, a certain computed value is indicated.

• When the engine is stopped, a certain value is indicated. • This data also includes the data for the air-fuel ratio learning control.

• Only "#" is displayed if item is unable to be measured. • Figures with "#"s are temporary ones. They are the same figures as an actual piece of data which was just previously measured.

ON-BOARD DIAGNOSTIC SYSTEM DESCRIPTION CONSULT (Conl'd) ACTIVE TEST MODE TEST ITEM

CONDITION

• Engine: Return to the original trouble condition FUEL INJECTION • Change the amount of fuel

JUDGEMENT

CHECK ITEM (REMEDY)


• Harness and connector • Fuel injectors • Heated oxygen sensor

Engine speed changes according to the opening percent.

• Harness and connector • IACV-AAC valve


• Harness and connector • Engine coolant temperature sensor • Fuel injectors

• Engine: Return to the original trouble condition If trouble symptom disappears, IGNITION TIMING • Timing light: Set see CHECK ITEM. • Retard the ignition timing using CONSULT.

• Adjust initial ignition timing

injection using CONSULT.

IACV-AACIV OPENING

• Engine: After warming up, idle the engine. • Change the IACV-AAC valve opening percent using CONSULT.

ENG COOLANT TEMP

POWER BALANCE

COOLING FAN

FUEL PUMP RELAY

• Engine: Return to the original trouble condition • Change the engine coolant . temperature indication using CONSULT.

• Engine: After warming up, idle the engine. • AIC switch "OFF" • Shift lever "N" • Cut off each injector signal one at a time using CONSULT. • Ignition switch: ON • Turn the cooling fan "ON" and "OFF" using CONSULT. • Ignition switch: ON (Engine stopped) • Turn the fuel pump relay "ON" and "OFF" using CONSULT

Engine runs rough or dies.

• • • • • •

Cooling fan moves and stops.

• Harness and connector • Cooling fan motor

Fuel pump relay makes the operating sound.

Harness and connector Compression Injectors Power transistor Spark plugs Ignition coils

• Harness and connector • Fuel pump relay

and listen to operating sound . EGRC SOLENOID VALVE SELF-LEARNING CONT

• Ignition switch: ON • Turn solenoid valve "ON" and "OFF" with the CONSULT and



listen to operating sound . • In this test, the coefficient of self-learning control mixture ratio returns to the original coefficient by touching "CLEAR" on the screen.

EC-259

•

ON-BOARD DIAGNOSTIC SYSTEM DESCRIPTION CONSULT (Conl'd) FUNCTION

TEST MODE

FUNCTION TEST ITEM

SELF-DIAG RESULTS

CONDITION

JUDGEMENT

• Ignition switch: ON (Engine stopped) • Displays the results of on-

CHECK ITEM (REMEDY)

-

Objective system

board diagnostic system . • Ignition switch: ON (Engine stopped) • Closed throttle position is CLOSED THROTTLE POSI

Throttle valve: opened

OFF

Throttle valve: closed

ON

tested when throttle is opened and closed fully. (Closed throttle position is selected by throttle position sensor.)

THROTTLE POSI SEN CKT

• Ignition switch: ON (Engine stopped) • Throttle position sensor circuit is tested when throttle is opened and closed fully.

PARK/NEUT POSI

• Ignition switch: ON (Engine stopped) • Inhibitor/Neutral position switch circuit is tested when shift lever is manip-

SW CKT

FUEL PUMP CIRCUIT

by checking the pulsation in fuel pressure when fuel tube is pinched .

Range (Throttle valve fully opened - Throttle valve fully closed)

More than 3.QV

Out of N/P positions

OFF

• Harness and connector • Neutral position switch or

In N/P positions

ON

There is pressure pulsation on the fuel feed hose.

• EGR valve & EVAP canister purge control solenoid valve circuit is tested by

The solenoid valve makes an operating sound every 3 seconds.

.

checking solenoid valve operating noise .

COOLING FAN CIRCUIT

• Ignition switch: ON (Engine stopped) • Cooling fan circuit is tested when coaling fan is rotated.

inhibitor switch • Linkage or inhibitor switch adjustment

• Harness and connector • Fuel pump • Fuel pump relay • Fuel filter clogging • Fuel level

• Ignition switch: ON (Engine stopped) EGRC SOLIV CIRCUIT

• Verify operation in DATA MONITOR mode. • Harness and connector • Throttle position sensor • Throttle position sensor adjustment • Throttle linkage • Verify operation in DATA MONITOR mode .

ulated . • Ignition. switch: ON (Engine stopped) • Fuel pump circuit is tested

• Harness and connector • Throttle position sensor • Throttle position sensor adjustment • Throttle linkage

The cooling fan rotates and stops every 3 seconds.

EC-260

• Harness and connector • EGR valve & EVAP canister purge control solenoid valve

• Harness and connector • Cooling fan motor • Cooling fan relay


CONDITION • Ignition switch: ON START

START SIGNAL CIRCUIT

JUDGEMENT

CHECK ITEM (REMEDY)

->

• Start signal circuit is tested when engine is started by operating the starter. Before cranking, battery voltage and engine coolant temperature are displayed. During cranking, average battery voltage, mass air flow

Start signal: OFF

->

• Harness and connector • Ignition switch

ON

•

sensor output voltage and . cranking speed are displayed .

PW/ST SIGNAL CIRCUIT

VEHICLE SPEED SEN CKT

• Ignition switch: ON (Engine running) • Power steering circuit is tested when steering wheel is rotated fully and then set to a straight line running position .

Locked position

ON

Neutral position

OFF

• Vehicle speed sensor circuit is tested when vehicle Vehicle speed sensor input signal is is running at a speed of 10 greater than 4 km/h (2 MPH) km/h (6 MPH) or higher . • After warming up, idle the engine.

IGN TIMING ADJ

• Ignition timing adjustment is checked by reading ignition timing with a tim-

• Harness and connector • Power steering oil pressure switch • Power steering oil pump

• Harness and connector • Vehicle speed sensor • Electric speedometer

• Adjust ignition timing (by The timing light indicates the same value on the screen.

ing light and checking whether it agrees with

moving crankshaft position sensor or distributor) • Camshaft position sensor drive mechanism

specifications.

MIXTURE RATIO TEST

• Air-fuel ratio feedback circuit (injection system, ignition system, vacuum system, etc.) is tested by Heated oxygen sensor COUNT: More examining the heated oxy- than 5 times during 10 seconds gen sensor output at 2,000 rpm under non-loaded state.

• INJECTION SYS (Injector, fuel pressure regulator, harness or connector) • IGNITION SYS (Spark plug, power transistor, ignition coil, harness or connector) • VACUUM SYS (Intake air leaks) • Heated oxygen sensor circuit • Heated oxygen sensor operation • Fuel pressure high or low • Mass air flow sensor

EC-261


CONDITION

JUDGEMENT

• After warming up, idle the engine. • Injector operation of each cylinder is stopped one

POWER BALANCE

after another, and resultant change in engine rotation is examined to evaluate combustion of each cylinder. (This is only displayed for models where a sequential multi port fuel injection system is used.)

• Injector circuit (Injector, harness or connector) Difference in engine speed is greater than 25 rpm before and after cutting off the injector of each cylinder.

• Ignition circuit (Spark plug, power transistor, ignition coil, harness or connector) • Compression • Valve timing

• After warming up, idle the engine. • IACV-AAC valve system is IACV-AACIV SYSTEM

CHECK ITEM (REMEDY)

Difference in engine speed is greater tested by detecting change than 150 rpm between when valve openin engine speed when ing is at 80% and at 20%. IACV-AAC valve opening is changed to 0%,20% and 80%.

EC-262

• Harness and connector • IACV-AAC valve • Air passage restriction between air inlet and IACV-AAC valve • IAS (Idle adjusting screw) adjustment

ON-BOARD DIAGNOSTIC SYSTEM DESCRIPTION CONSULT (Cont'd) REAL TIME DIAGNOSIS IN DATA MONITOR MODE CONSULT has two kinds of triggers and they can be selected by touching "SETTING" in "DATA MONITOR" mode. 1. "AUTO TRIG" (Automatic trigger): • The malfunction will be identified on the CONSULT screen in real time. In other words, DTC and malfunction item will be displayed at the moment the malfunction is detected by ECM. DATA MONITOR can be performed continuously until a malfunction is detected. However, DATA MONITOR cannot continue any longer after the malfunction detection. 2. "MANU TRIG" (Manual trigger): • DTC and malfunction item will not be displayed automatically on CONSULT screen even though a malfunction is detected by ECM. • DATA MONITOR can be performed continuously even though a malfunction is detected. Use these triggers as follows: 1. "AUTO TRIG" • While trying to detect the DTC by performing the "DTC CONFIRMATION PROCEDURE", be sure to select to "DATA MONITOR (AUTO TRIG)" mode. You can confirm the malfunction at the moment it is detected . • While narrowing down the possible causes, CONSULT should be set in "DATA MONITOR (AUTO TRIG)" mode, especially in case the incident is intermittent. Inspect the circuit by gently shaking (or twisting) suspicious connectors, components and harness in the "DTC CONFIRMATION PROCEDURE". The moment a malfunction is found the DTC will be displayed. (Refer to GI section, "Incident Simulation Tests" in "HOW TO PERFORM EFFICIENT DIAGNOSIS FOR AN ELECTRICAL INCIDENT".) 2. "MANU TRIG" • If the malfunction is displayed as soon as "DATA MONITOR" is selected, reset CONSULT to "MANU TRIG". By selecting MANU TRIG you can monitor and store the data. The data can be utilized for further diagnosis, such as a comparison with the value for the normal operating condition.

I~

SELECT

MONITOR

ECM INPUT

I

I

ITEM

1

FROM

SET RECORDING

AUTO TRIG

SIGNALS

HI SPEED

MAIN SIGNALS SELECTION

I~

I I

COND

MANU

MANU TRIG

TRIG

LONG TIME

HI SPEED

MENU

_

1======== __ l-SE-TI-IN-G

ll--S-T.-AR-T--

"SETIING"

1__ "AUTO TRIG"

J "MANU

TRIG"

A malfunction can be

A malfunction

displayed on "DATA

displayed on "DATA

MONITOR" screen

MONITOR"

automatically

automatically

if detected.

can not be

screen even if

detected.

SEF6740

EC-263

TROUBLE DIAGNOSIS -

General Description

Introduction Sensors ~

ECM

Actuators

~~.~

MEF036D

The engine has an ECM to control major systems such as fuel control, ignition control, idle air control system, etc. The ECM accepts input signals from sensors and instantly drives actuators. It is essential that both input and output signals are proper and stable. At the same time, it is important that there are no problems such as vacuum leaks, fouled spark plugs, or other problems with the engine. It is much more difficult to diagnose a problem that occurs intermittently rather than continuously. Most intermittent problems are caused by poor electric connections or improper wiring. In this case, careful checking of suspected circuits may help prevent the replacement of good parts. A visual check only may not find the cause of the problems. A road test with CONSULTor a circuit tester connected should be performed. Follow the "Work Flow" on the next page. Before undertaking actual checks, take just a few minutes to talk with a customer who approaches with a driveability complaint. The customer can supply good information about such problems, especially intermittent ones. Find out what symptoms are present and under what conditions they occur. A "Diagnostic Worksheet" like the example on EC-267 should be used. Start your diagnosis by looking for "conventional" problems first. This will help troubleshoot driveability problems on an electronically controlled engine vehicle.

SEF234G

EC-264

TROUBLE DIAGNOSIS -

General Description

Work Flow CHECK IN

Listen to customer complaints.

(Get symptoms.)

...............................................

Check, print out or write down, and erase Diagnostic Trouble Code (DTC). Symptoms collected.

STEP I

..

STEP II

No symptoms but Malfunction Code exists at STEP II.

Verify the symptom by driving in the condition the customer described. Normal Code (at STEP II)

'1

.....................................

STEP III

Malfunction Code (at STEP II)

Verify the DTC by performing

Choose the appropriate

'1 ...... STEP IV

the "DTC CONFIRMATION PROCEDURE"

. '2

action.

Malfunction Code (at STEP II or IV)

STEP V

Normal Code (at both STEP II and IV) BASIC INSPECTION SYMPTOM BASIS (at STEP I or III)

Perform inspections according to Symptom Matrix Chart.

STEP VI

TROUBLE DIAGNOSIS FOR DTC XXX.

REPAIR/REPLACE

NG

FINAL CHECK Confirm that the incident is completely fixed by performing BASIC INSPECTION and DTC CONFIRMATION PROCEDURE (or OVERALL FUNCTION CHECK).

......................................

STEP VII

OK

CHECK OUT

*1: If the incident cannot be duplicated, refer 10 GI section ("Incident Simulation Tesls", "HOW TO PERFORM EFFICIENT DIAGNOSIS FOR AN ELECTRICAL *2: If the on-board DIAGNOSIS

diagnostic

INCIDENT").

system cannot be performed,

FOR POWER SUPPLY",

check main power supply and ground circuit. Refer 10 "TROUBLE

EC-286.

EC-265

•

TROUBLE DIAGNOSIS -

General Description

Description for Work Flow DESCRIPTION

STEP STEP I

STEP II

STEP III

Get detailed information about the conditions and the environment when the incident/symptom using the "DIAGNOSTIC WORKSHEET" as shown on the next page.

occurred

Before confirming the concern, check and write down (print out using CONSULT) the Diagnostic Trouble Code (DTC), then erase the code. The DTC can be used when duplicating the incident at STEP 1/1 & IV. Study the relationship between the cause, specified by DTC, and the symptom described by the customer. (The "Symptom Matrix Chart" will be useful. Refer to EC-274.) Try to confirm the symptom and under what conditions the incident occurs. The "DIAGNOSTIC WORK SHEET" is useful to verify the incident. Connect CONSULT to the vehicle in DATA MONITOR (AUTO TRIG) mode and check real time diagnosis results. If the incident cannot be verified, perform INCIDENT SIMULATION TESTS. Refer to GI section. If the malfunction code is detected, skip STEP IV and perform STEP V. Try to detect the Diagnostic Trouble Code (DTC) by driving in (or performing) the "DTC CONFIRMATION PROCEDURE". Check and read the DTC by using CONSULT. During the DTC verification, be sure to connect CONSULT to the vehicle in DATA MONITOR (AUTO TRIG) mode and check real time diagnosis results.

STEP IV

If the incident cannot be verified, perform INCIDENT SIMULATION TESTS. Refer to GI section. In case the "DTC CONFIRMATION PROCEDURE" is not available, perform the "OVERALL FUNCTION CHECK" instead. The DTC cannot be displayed by this check, however, this simplified "check" is an effective alternative. The "NG" result of the "OVERALL FUNCTION CHECK" is the same as the DTC detection.

STEP V

Take the appropriate action based on the results of STEP I through IV. If the malfunction code is indicated, proceed to TROUBLE DIAGNOSIS FOR DTC XX. If the normal code is indicated, proceed to the BASIC INSPECTION. Refer to EC-271. Then perform inspections according to the Symptom Matrix Chart. Refer to EC-274.

STEP VI

Identify where to begin diagnosis based on the relationship study between symptom and possible causes. Inspect the system for mechanical binding, loose connectors or wiring damage using (tracing) "Harness Layouts". Gently shake the related connectors, components or wiring harness with CONSULT set in "DATA MONITOR (AUTO TRIG)" mode. Check the voltage of the related ECM terminals or monitor the output data from the related sensors with CONSULT. Refer to EC-277. The "DIAGNOSTIC PROCEDURE" in EC section contains a description based on open circuit inspection. A short circuit inspection is also required for the circuit check in the DIAGNOSTIC PROCEDURE. For details, refer to GI section ("HOW TO PERFORM EFFICIENT DIAGNOSIS FOR AN ELECTRICAL INCIDENT", "Circuit Inspection"). Repair or replace the malfunction parts.

.

Once you have repaired the circuit or replaced a component, you need to run the engine in the same conditions and circumstances which resulted in the customer's initial complaint. Perform the "DTC CONFIRMATION PROCEDURE" and confirm the normal code (Diagnostic trouble code No. STEP VII

55) is detected. If the incident is still detected in the final check, perform STEP VI by using a different method from the previous one. Before returning the vehicle to the customer, be sure to erase the unnecessary (already fixed) DTC in ECM. (Refer to EC-252.)

EC-266

TROUBLE DIAGNOSIS -

General Description

Diagnostic Worksheet There are many operating conditions that lead to the malfunction of engine components. A good grasp of such conditions can make troubleshooting faster and more accurate. In general, each customer feels differently about a problem. It is important to fully understand the symptoms or conditions for a customer complaint. Utilize a diagnostic worksheet like the one shown below in order to organize all the information for troubleshooting.

KEY POINTS

WHAT WHEN

..... Vehicle

& engine model Date, Frequencies Road conditions Operating conditions, Weather conditions, Symptoms

WHERE HOW

SEF907L

WORKSHEET Customer name Engine

•

SAMPLE MR/MS

#

Incident Date

Model & Year

VIN

Trans.

Mileage

Manuf. Date

In Service Date

o o

Startability

[J Idling

Symptoms

o

Driveability

o

Engine stall

Incident occurrence Frequency Weather conditions Weather Temperature

Engine conditions

o o o

Impossible to start o No combustion o Partial combustion o Partial combustion affected by throttle position

o Partial combustion NOT affected by throttle position Possible but hard to start o Others [ o

No fast idle Others [

Driving conditions

Engine speed

o o o o o

In town

Low idle

I

I

I

o

I

4,000

o

In suburbs

I

0

o

I

I

2,000

o

Highway

I 6,000

Turned on

o

I

I

10

I

I

20

Not turned on

EC-267

I

I

30

I

I

40

I

]

of

I

Off road (up/down)

Not affected At starting o While idling o At racing While accelerating o While cruising While decelerating o While turning (RH/LH)

Vehicle speed


o

High idle ]

[J Stumble o Surge o Knock o Lack of power o Intake backfire o Exhaust backfire o Others [ ] o At the time of start o While idling o While accelerating o While decelerating o Just after stopping o While loading o Just after delivery o Recently o In the morning o At night o In the daytime o All the time o Under certain conditions o Sometimes o Not affected o Fine DRaining o Snowing o Others [ o Hot o Warm o Cool o Cold o Humid o During warm-up o Cold o After warm-up

0 Road conditions

o

Unstable

]

I

50

I

I

60 MPH

I

8,000 rpm

TROUBLE DIAGNOSIS -

General Description

Diagnostic Trouble Code (DTC) Chart ENGINE RELATED ITEMS Diagnostic trouble code No. MIL 11

Detected items Malfunction is detected when ...

(Screen terms for CONSULT, "SELF-DIAG RESULTS" mode) Camshaft position sensor circuit (CAMSHAFT POSI SEN)

0

• Either 1 or 180 signal is not detected by the ECM for the first few seconds during engine cranking . • Either 1 or 180 signal is not detected by the ECM often enough while the engine speed is higher than the specified rpm . • The relation between 1" and 180" signals is not in the normal range during the specified rpm . 0

0

12

Mass air flow sensor circuit (MASS AIR FLOW SEN)

0

• An excessively high or low voltage is entered to ECM. • Voltage sent to ECM is not practical when compared with the camshaft position sensor signal and throttle position sensor signal.

13

Engine coolant temperature sensor circuit (COOLANT TEMP SEN)

• An excessively high or low voltage from the sensor is detected by the ECM.

21

Ignition signal circuit (IGN SIGNAL-PRIMARY)

• The ignition signal in the primary circuit is not detected by the ECM during engine cranking or running.

34

Knock sensor circuit (KNOCK SENSOR)

• An excessively low or high voltage from the sensor is detected by the ECM.

43

Throttle position sensor circuit (THROTTLE POSI SEN)

• An excessively low or high voltage from the sensor is detected by

No failure (NO SELF DIAGNOSTIC FAILURE INDICATED...)

• No malfunction related to OBD system is detected by either ECM or AIT control unit.

55

the ECM. • Voltage sent to ECM is not practical when compared with the mass air flow sensor and camshaft position sensor signals .

*1: This is Quick Reference of "DTC CONFIRMATION PROCEDURE". Details are described in each TROUBLE DIAGNOSIS FOR DTC XX. Abbreviations are as follows: IGN: ON : Turning the ignition switch ON is required for the ECM to detect a malfunction (if one exists). RUNNING: Running engine is required for the ECM to detect a malfunctiQn (if one eXists).

EC-268

TROUBLE DIAGNOSIS - General Description ill] Diagnostic Trouble Code (DTC) Chart (Cont'd)

x:

-: *1

"DTC

Applicable Not applicable

*2

Check Items

CONFIRMATION

"OVERALL FUNC-

Fail

(Possible Cause)

PROCEDURE"

TION CHECK"

Safe

Quick Ref.

Quick Ref.

System

Reference Page

• Harness or connectors (The sensor circuit is open or shorted.) • Camshaft position sensor • Starter motor • Starting system circuit (EL section) • Dead (Weak) battery • Harness or connectors (The sensor circuit is open or shorted.) • Mass air flow sensor • Harness or connectors (The sensor circuit is open or shorted.) • Engine coolant temperature sensor • Harness or connectors (The ignition primary circuit is open or shorted.) • Power transistor unit • Camshaft position sensor • Camshaft position sensor circuit

RUNNING

-

-

EC-289

RUNNING

RUNNING

X

EC-293

-

IGN: ON

-

X

EC-297

RUNNING

-

-

EC-301

RUNNING

-

-

EC-306

-

IGN: ON

X

EC-309

• Harness or connectors (The sensor circuit is open or shorted.) • Knock sensor • Harness or connectors (The sensor circuit is open or shorted.) • Throttle position sensor • No failure -

-

-

-

*2: • The "OVERALL FUNCTION CHECK" is a simplified and effective way to inspect a component or circuit. In some cases, the "OVERALL FUNCTION CHECK" is used rather than a "DIAGNOSTIC TROUBLE CODE CONFIRMATION PROCEDURE". When no DTC CONFIRMATION PROCEDURE is available, the "NG" result of the OVERALL FUNCTION CHECK can be considered to mean the same as a DTC detection . • During an "NG" OVERALL FUNCTION CHECK, the DTC might not be confirmed.

EC-269

•

TROUBLE DIAGNOSIS -

General Description

Fail-Safe Chart The ECM enters fail-safe

mode, if any of the following

DTCs is recorded due to the open or short circuit.

DTC No. MIL

Detected items

Engine operating condition

in fail-safe mode

12

Mass air flow sensor circuit

Engine speed will not rise more than 2,400 rpm due to the fuel cut.

13

Engine coolant temperature sensor circuit

Engine coolant temperature switch "ON" or "START".

will be determined

Condition

based on the time after turning ignition

Engine coolant temperature decided


30'C (86'F)

More than 4 minutes after ignition ON or Start Except as shown above

43

Throttle position sensor circuit

80'C (176'F) 30 - 80'C (86 - 176'F) (Depends on the time)

Throttle position will be determined based on the injected fuel amount and the engine speed. Therefore, acceleration will be poor. Condition

Driving condition

When engine i$ idling

Normal

When accelerating

-

Start signal circuit

Poor acceleration

If the ECM always receives a start signal, the ECM will judge the start signal "OFF" when engine speed is above 1,000 rpm. This prevents extra enrichment. After the engine speed is below 200 rpm, start-up enrichment engine speed reaches 1,000 rpm.

-

ECM

will be allowed until the

Fail-safe system activating condition when ECM is malfunctioning The computing function of the ECM was judged to be malfunctioning. When the fail-safe system activates (i.e., if the ECM detects a malfunction condition in the CPU of ECM), the MALFUNCTION INDICATOR LAMP on the instrument panel lights to warn the driver. Engine control, with fail-safe system, operates when ECM is malfunctioning When the fail-safe system is operating, fuel injection, ignition timing, fuel pump operation, IACV-AAC valve operation tain limitations.

and cooling fan operation

are controlled

under cer-

Operation Engine speed

Engine speed will not rise more than 3,000 rpm

Fuel injection

Simultaneous multi port fuel injection system

Ignition timing

Ignition timing is fixed at the preset valve

Fuel pump

Fuel pump relay is "ON" when engine is running and "OFF" when engine stalls

IACV-AAC valve Cooling fans

Full open Cooling fan relay "ON" (High speed condition) when engine is running, and "OFF" when engine stalls

EC-270

TROUBLE DIAGNOSIS -

General

Descrip_ti_on

1

S_R_'

Basic Inspection Precaution: Perform Basic Inspection without electrical or mechanical loads applied; • Headlamp switch is OFF, • Air conditioner switch is OFF, • Rear defogger switch is OFF, • Steering wheel is in the straight-ahead position, etc.

\\ ~

m

~ SEF1421

BEFORE

STARTING

1. Check service records for any recent repairs that may indicate a related problem, or the current need for scheduled maintenance. 2. Open engine hood and check the following: • Harness connectors for improper connections • Vacuum hoses for splits, kinks, or improper connections • Wiring for improper connections, pinches, or cuts

•

IGN TIMING ADJ.

•

0 CONNECT

IGNITION TIMING FEEDBACK CONTROL WILL BE HELD BY TOUCHING START AFTER DOING SO, ADJUST IGNITION TIMING WITH A TIMING LIGHT BY TURNING THE CAMSHAFT POSITION SENSOR.

CONSULT

TO THE VEHICLE.

Connect "CONSULT" to the data link connector for CONSULT and select "ENGINE" from the menu. Refer to EC-254.

DOES ENGINE

START

START?

No

Go to

(I.

Yes

SEF555N

CHECK

(ij\ ~

IGNITION

TIMING.

1. Warm up engine sufficiently. 2. Select "IGN TIMING ADJ" in "WORK SUPPORT" mode. 3. Touch "START". 4. Check ignition timing at idle using timing light. Ignition timing: 15°::f:2° BTDC

~

~

1 Warm up engine sufficiently. Stop engine and disconnect throttle position sensor harness connector. 3. Start engine. 4. Check ignition timing at idle using timing light.

2:

Ignition timing: 15°::f:2° BTDC OK

(Go to @ on next page.)

EC-271

Adjust ignition timing by turning distributor.

TROUBLE DIAGNOSIS - General Description Basic Inspection (Cont'd) I!]

•

IGN TIMING ADJ.

IGNITION TIMING FEEDBACK CONTROL WILL BE HELD BY TOUCHING START AFTER DOING SO, ADJUST IGNITION TIMING WITH A TIMING LIGHT BY TURNING THE CAMSHAFT POSITION SENSOR

I Ii

@

0 I!]

CHECK IDLE ADJ. SCREW INITIAL SET RPM. 1. Select "IGN TIMING ADJ" in

00 I

START

• THRTL POS SEN ADJ .0

00

ADJ MONITOR •••

THRTL POS SEN

========

MONITOR

CMPS.RPM(REF) CLSDTHUP

NG

Adjust engine speed by turning idle adjusting screw.

NG ---..

Adjust output voltage to 0.50V by rotating throttle position sensor body.

"WORK SUPPORT" mode. 2. When touching "START", does engine speed fall to 750:!: 50 rpm (AfT in "N" position)?

SEF546N

•••

---..

OR Does engine run at 750:!: 50 rpm (AfT In "N" position)?

O,52V

OK

======== Reconnect throttle position sensor har-

Orpm ON

ness connector.

SEF165P

Ii CHECK THROTTLE POSITION SENSOR IDLE POSITION. 1. Perform ''THRTL POS SEN ADJ" in "WORK SUPPORT"

00

mode. 2. Check that output voltage of

00

throttle position sensor is approx. 0.35 to 0.65V (Throttle valve fully closes.) and "CLSD THLIPOSI" stays "ON". OR Measure output voltage of throttie position sensor using voltmeter, and check that it is approx. 0.35 to O.65V.(Throttle valve fully closed.) OK •

~

, CID (Go to next page)

EC-272

1 RESET IDLE POSITION MEMORY. 1. Warm up engine sufficiently. 2. Turn ignition switch "OFF" and wait at least 5 seconds. 3. Disconnect throttle position sensor harness connector. 4. Start engine and wait at least 5 seconds in "N" position. 5. Reconnect throttle position sensor harness connector while running engine.

1

TROUBLE DIAGNOSIS - General Description Basic Inspection (Conl'd) @

CHECK

(ij\ ~

fiY\ ~

IDLE SPEED Read the engine idle speed in "DATA MONITOR" mode with CONSULT. MfT = 800:1: 50 rpm AfT = 800:1: 50 rpm (in uN" position) OR Check idle speed. MfT = 800:1:50 rpm AfT = 800:1: 50 rpm (in uN" posillon) OK

After this inspection, unnecessary diagnostic trouble code No. might be displayed. Erase the stored memory in ECM. OK INSPECTION

EC-273

END

NG

Adjust idle speed. to EC-243.

Refer

•

TROUBLE DIAGNOSIS -

General Description

Symptom Matrix Chart SYMPTOM

z

0

i=
w

(!J

0::

::>

i='

SYSTEM - Basic engine control system

l/)

6' 0 ;S ....J

0

S?III:

j:::: 0 e..

l-

l/)

0::
l-

l/)

uJ

l/)

II:

W ....J

0

0

Q

z

z

0 0

II:

:r:

II:

:r:

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w

z B z w

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Z

0

i=

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w

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0 0
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c.. ii: w

~

0

c..

u. 0 :>::: 0
-l

0

-l

i= (9 c.. z ::2: :J ::> w l/) l/) w z 0

Q

:r: Q :r:

(9

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Z

Q 0

:>:::

iJJ

IZ II:

::>

I-

w

II:

0

z

ill

Z

w

z

a

~

II:

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0

0

::>

z

0

0 Z :>::: :>:::

9W

W II:

z

::>

....J

w

(!)

Z

0::
0

i= c..

:r:

0 0::

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w

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0

z

0 0

(!)

z

-l

U.

(5

W

W

l/)

l/)

l/)

I-

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B

II:

> ::: O' ~ B 0 0 w w w u.. Z >< >< > > >
z 2-

Reference page

0
w

0

>II: w

r:
co

1A 18 1C 1F 1H 1R 1S 1M 1J 1L 1K 1T 1V 1N 1P 1X 1Y Fuel

Fuel pump circuit Fuel pressure regulator system Injector circuit Evaporative emission system

Air

Positive crankcase ventilation system IACV-Air regulator Incorrect idle speed adjustment IACV-AAC valve circuit IACV-FICD solenoid valve circuit

Ignition

Incorrect ignition timing adjustment Ignition circuit

EGR

EGR valve & EVAP canister purge control solenoid valve circuit EGR system

Main power supply and ground circuit Cooling

Cooling fan circuit

Air conditioner circuit

• • • • • • 0 00 00 0 • • • • • • •0 0• 0• 0• 0• 0• 0 00 0 0 0 • 0 • 0 0 0 0 • 0• • 0• • • 0• • • • • • • • • 0 0 0 0 0 0 0 0 0 0 0 0 • 0 • • • 0 0 • • • • • • • • • • 0 • 0 0 • • • 00 0 0• 00 0 0 0 0 0

0

0

0

0

0

0

0

()

C)

0 0 0 0

0 0

0 0

0 0


0 0 0 0

0 0

0

• • •

0 EC-327 EC-241 EC-324 EC-238

0

0 0 0

EC-240

0

EC-332 EC-243

•

0 EC-335

C)

EC-339

• • •

EC-243 EC-301 EC-319 EC-319

0 0

0 0

0 0

0

0 EC-286 0 EC-343 0 HA section (continued on next page)

EC-274

TROUBLE DIAGNOSIS - General Description Symptom Matrix Chart (Cont'd) SYMPTOM

z

0

1=
w CJ 0:: ::::>

en

i='

is'

;:::

0

~ 0 .... ~ 0::
0

..J

SYSTEM - ECCS system

Q.

en

0

2i 2i 0::

I CJ ::::>

Z

0::
Z

..J W () ()

0 0

Q.

....
0

w

0

0::

..J ..J

..J

u-

en

Z W

w

I

5

9

9

a:

::.:::

U

u0 ::.:::

0:: ::::>

Z

::.:::

0::

0

::.::: 0::
() ..J

z

.... W Z

0

Q. (/)

0

Z

Q.

1= Q.

1=

:2

::; ::::> w en en z w 0

5 z e; W Z ..J

:r:

s: ....0 0

Q.

z

I CJ

W

9-

Z

0 W

0::

w

0::

z

::::> 0::

()

..J W

::::>

Camshaft position sensor circuit Mass air flow sensor circuit Heated oxygen sensor circuit Engine coolant temperature sensor circuit Throttle position sensor circuit Incorrect fhrottle position sensor adjustment

• • • • • • • • • • • • • • 0 • 0

0

0

Vehicle speed sensor circuit Knock sensor circuit ECM Start signal circuit Park/Neutral

position switch circuit

Power steering oil pressure switch circuit

0 0

0

0

0

• • • • • 0

0

• •

• •

0

()

:2

0::

::::>

w

en

0 Z

z

0

U

CJ

..J

....

(/)

en

..J

0 0

2-

z

0
0::
0

e;

Reference page

w

en en WI () () w0::>u: u: w en 0:: z 0:: 0:: 0:: w W w e; u u w w w 1= .... > >
::.:::

()

0 0 0

0 0 0 0 0 0

0

0

• • 0 •

0 0 0 0 0 0

CJ 0::
0

u- 0 w w > >

11\ 18 1C 1F 1H 1R 1S 1M 1J 1L 1K 1T ECCS

W

Z

W ..J

0 0 0

1V 1N 1P 1X 1Y

0

EC-289

• • • •

0

EC-293 EC-362 EC-297 EC-309

0

0

EC-272

EC-306

0

0 0 0

0

0

EC-314

0

EC-270 EC-317

0 0

0 0


0

0

EC-357 EC-354 (continued on next page)

EC-275

•

TROUBLE DIAGNOSIS - General Descrip_tio_n Symptom Matrix Chart (Cont'd)

1

s_R_1

SYMPTOM

z

0 i=

«

i='

w a: ::J en

~

f:::. 0

CJ

Q 0 ....J

SYSTEM - Engine mechanical & other

0

S:?I-

a:

«

a:

«

I-

~

en

a:

0

0

Z

Z

Ci Ci a: a: « «

:I:

:I:

w

....J

....J ....J

«

I-

9 en :I:

CJ :J

0

a:

W

Z

u.

Z

0 i=

«

I-

a wen

z w

w

«

:I:

(.) (.)

a:

9 CJ

8 z

8

:I:

0

0..

u..

0

0

e-

(.)

0

w :J u..

Z

0

:J l-

:.:::

«

0

....J

a: w

z

w a:

(.)

:2

z

Z

:.::: :.::: a:

W

a:

ii:

:.:::

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(.)

en

(l)

0..

«

a:

ii:

a: w Iu..

«

:J

a: w

z

a

Z

w

en

0

....J

W

>

Fuel tank Fuel piping Vapor lock Valve deposit

Air

Poor fuel (Heavy weight gasoline. Low octane) Air duct

0

0

0

0

0

Cranking

0

0 0

0

Throttle body. Throttle wire

•

• • • • •

0 0

0

•

0 0

0 0 0 0

0 0

0 0

0 0 0 0

Air leakage from intake manifoldl Coliector/Gasket Battery Alternator circuit

0

0

Inhibitor switch Cylinder head Cylinder head gasket

Connecting rod Bearing Crankshaft Timing chain

0 0

Exhaust

Exhaust manifoldlTube/Mulfler/Gasket Three way catalyst

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

Lubrication

Oil pan/Oil strainer/Oil pump/Oil filterl Oil gallery Oil level (Low)/Filthy oil

• • • •

Camshaft Intake valve Exhaust valve Hydraulic lash adjuster

Radiator/Hose/Radiator Thermostat

filler cap

Water pump Water gallery Cooling fan Coolant level (low)/Contaminated coolant

•

0

0 0

0

•

0 0 0 0 0 0

0 0 0 0

0 0 0 0 0 0

0

0

0

0

0 0


EC-276

0 0 0 0 0 0

~

-

0

0 0 0 0 0 0

0 0 0 0 0 0

0

0

0

0 0 0 0 0 0 0 0 0 0 0 0

0

« > > > (l)

FE section

0

0 0 0 0 0 0

0

>-

a: w

0

0

0 0 0 0 0 0

0 0

0

0 0

•

a: w

•

•

•

0 0 0 0 0

•

:I:

a: w

(.)

«

Cl

-

0 0 0 0 0 0 0

0

0

0

0 0

0 0 0 0

0 0 0 0

«

(.)

Cl

w

1V 1N 1P 1X 1Y

0 0 0 0 0 0 0 0 0 0 '0 0 0 0 0 0 0 0

• • 0•

0 0

a a:

Reference page

0 0 EL section AT section

• • 0•

•

x

....J

0 0

()

Piston Piston ring

Cooling

0

()

Cylinder block

Valve mechanism

0

• • •0 00 • 00 • • 0• • • 0 0• 0 0• • • 00 00 0• 00 00 • 0 0 0 0 0 0

Flywheel

w

en

z 2-

0 0

Air leakage from air duct (Mass air flow sensor - throttle body)

Starter circuit

Engine

0 0 0 0

«

0

0

0 0 0 0

I-

w

0

Air cleaner

W

en

(.)

0

0 0

CJ Z

....J

0

(.)

x

0 0

0

(.)

w

0

0

Cl

z

w :I: a: w

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

:J

en enen>

en w

1A 1B 1C 1F 1H 1R 1S 1M 1J 1L 1K 1T Fuel

«

:I:

en

0

z

0 i=

z

:.:::

a:

:2

:J

I-

W

0..

(.)

w en w

(.)

i=

CJ

Z 0..

:J

0 0

~

W a:

z

0

....J

:E z az en 0.. W ....J l9 ii. ~ « w ....J 0..

I-

a: w ....J w

0

0

0

0 0

0 0 -

0 0 0 0 0 0 0 0

TROUBLE DIAGNOSIS -

General Description

CONSULT Reference Value in Data Monitor Mode Remarks: • Specification data are reference values . • Specification data are output/input values which are detected or supplied by the ECM at the connector. * Specification data may not be directly related to their components signals/values/operations. (Le., Adjust ignition timing with a timing light before monitoring IGN TIMING. Specification data might be displayed even when ignition timing is not adjusted to specification. This IGN TIMING monitors the data calculated by the ECM according to the input signals from the camshaft position sensor and other ignition timing related sensors.) • If the real-time diagnosis results are NG, and the on-board diagnostic system results are OK, when diagnosing the mass air flow sensor, first check to see if the fuel pump control circuit is normal. CONDITION

MONITOR ITEM CMPS.RPM (REF)

• Tachometer: Connect • Run engine and compare tachometer indication with the CONSULT value.

MAS AIR/FL SE

• • • •

COOLAN TEMPIS


SPECIFICATION Almost the same speed as the CONSULT value .

Idle

1.3 - 1.7V

2,000 rpm

1.7 - 2.1V More than 70°C (15S0F)


0- 0.3V .....0.6 - 1.0V

02 SEN Maintaining engine speed at 2,000 rpm

• Engine: After warming up MIR FIC MNT

LEAN +--> RICH Changes more than 5 times during 10 seconds.

VHCL SPEED SE

• Turn drive wheels and compare speedometer indication with the CONSULT value

Almost the same speed as the CONSULT value

BATTERY VOLT


11 - 14V

THRTL

pas

SEN


START SIGNAL


CLSD THLIPOSI


AIR COND SIG

PIN POSI SW

->

START

->

Throttle valve fully closed

0.35 - 0.65V

Throttle valve fully opened

Approx. 4.0V OFF

ON


Throttle valve: Idle position

ON

Throttle valve: Slightly open

OFF

Air conditioner switch: OFF

OFF

Air conditioner switch: ON (Compressor operates)

ON

Shift lever "P" or "N"

ON

Except above

OFF


EC-277

->

ON

->

OFF

•

TROUBLE DIAGNOSIS - General Description CONSULT Reference Value in Data Monitor Mode (Cont'd) MONITOR ITEM

PW/ST SIGNAL

INJ PULSE

CONDITION


• • • •


IGN TIMING

SPECIFICATION Steering wheel in neutral position (forward direction)

OFF

The steering wheel is turned

ON

Idle

2.5 - 3.7 msec .

2,000 rpm

1.9 - 2.8 msec .

Idle

13 - 15° BTDC

2,000 rpm

More than 25° BTDC

Idle

20 - 40%

2,000 rpm

-

Maintaining engine speed at 2.000 rpm

53 - 155%

ditto

IACV-AACIV

ditto

A/F ALPHA


AIR COND RLY

• Air conditioner switch:

ON

FUEL PUMP RLY

• Ignition switch is ~urned to ON (Operates for 5 seconds) • Engine running and cranking • When engine is stopped (stops in 1.0 seconds) • Except as shown above

OFF

COOLING FAN

EGRC SOLIV

OFF

-+

ON

OFF

• After warming up engine. idle the engine. • Air conditioner switch: OFF • Vehicle stopped

• • • •


EC-278

[]K]

-+

Engine coolant temperature is 94°C (201°F) or less for AfT models. and 99°C (210°F) or less for M/T models

OFF

Engine coolant temperature is between 95°C (203°F) and 104°C (219°F) for A/T models only

LOW

Engine coolant temperature is 105°C (221°F) or more for A/T models. and 100°C (212°F) or more for M/T models

HIGH

Idle

ON

2.000 rpm

OFF

ON

TROUBLE DIAGNOSIS -

General Description

Major Sensor Reference Graph in Data Monitor Mode The following are the major sensor reference graphs in "DATA MONITOR" mode. (Select "HI SPEED" in "DATA MONITOR" with CONSULT.)

THRTL POS SEN, CLSD THLIPOSI Below is the data for "THRTL pas SEN" and "CLSD THLIPOSI" when depressing the accelerator pedal with the ignition switch "ON". The signal of "THRTL pas SEN" should rise gradually without any intermittent drop or rise after "CLSD THLIPOSI" is changed from "ON" to "OFF". -00"09 +02"69

CLSD THUPOSI 10:22

ON

OfF Full { Release

I

~

THRTL 10:22

.

o ~

POS SEN xO.1V

13

•

-00"09 +02"69

38

2,6

51,

\

Full Depress { SEF673Q

CMPS.RPM

(REF), MAS AIR/FL SE, THRTL POS SEN, 02 SEN, INJ PULSE

Below is the data for "CMPS.RPM (REF)", "MAS AIR/FL SE", "THRTL pas SEN", "02 SEN" and "INJ PULSE" when revving quickly up to 4,800 rpm under no load after warming up engine sufficiently. Each value is for reference, the exact value may vary .

....

,

. .....

E

c.

'"

-8~ u..~

• "CMPS'RPM{REF)"

,... ..."" .. ,

w><

should increase gradually

the accelerator

the pedal without any intermittent

co_

o:

<',••""", ..,..'

~ lO

pedal and

should decrease gradually after releasing

............

0:

~ Q.

en

while depressing

,

,

d

_

drop or rise,

.

..... ,..

Q.C\j

:EOio

()o

•

/

> w

:;re><

(J)

-" !o!:: 0:

....

.0"

.':

• "MAS AIRIFL SE" should increase when depressing

....•

"'-

", ••'\o,

""

,

.".

~

_ ••••_

_

.

the accelerator

pedal and should

decrease at the moment "THRTL POS SEN" is

C')_

~

closed (accelerator

pedal is released),

C{LO (J)C\j
"",0>0 ",,0

It.

SEF059P

EC-279

m:J TROUBLE DIAGNOSIS - General Description Major Sensor Reference Graph in Data Monitor Mode (Cont'd) <0

0

,... <0

0 ~ 9 0 +

..lO

"

l')

> ..z

w

0 x

pedel and should

l')

~

...J

0

SEN" should increase while

the accelerator

...

a..

<0

pas

depressing

decrease while releasing it.

en en 0 I0: :I: I-

• "THRTL

<0 C\l

lO C\l

Oi

0

,...

m.

0

<0

~ ~+

A

C\l

C\l 0>

> 0 ci

X

to

C\l

.----v-. <0 """

z

w

en C\l

_...:------.

lO C\l

0

Oi

<0

,...

0

0

<0

9

0

b ~

0

---....

I-A

• ''02 SEN" may increase immediately depressing

the accelerator

after

pedel and may

decrease after releasing the pedal .

---

0 C\l

+ II)

c..> w en ;!~

:~. • "INJ PULSE" should increase when depressing

w

II)

en

...J

::>

a..

~ z

j

'.\

lO C\l

Oi

0

0

.

.-'\

~-

the accelerator

pedal and should decrease

when the pedal is released .

A

SEF259QA

EC-280

TROUBLE DIAGNOSIS -

General Description

ECM Terminals and Reference Value PREPARATION 1. ECM is located behind the center console. For this inspection, remove the front passenger center console panel.

•

2.


3.

Perform all voltage measurements with the connectors connected. Extend tester probe as shown to perform tests eas-

MEF505D

ily.

!~ Thin wire

Tester probeJ

SEF3671


TERMINAL

LAYOUT

SEF877K

EC-281

TROUBLE DIAGNOSIS - General Description [![] ECM Terminals and Reference Value (Cont'd) ECM inspection table *Data are reference values. TERMINAL NO.

WIRE COLOR

ITEM

CONDITION

'DATA

[Engine is runninQ] 0.2 - 0.3V L 1

W/B

Idle speed

Ignition signal IEngine is running.1 Approximately 0.7V L


IEngine is running] 2

LlOR

Tachometer

Approximately 0.9V L

Idle speed

!Engine is running.1 3

GY/R

Ignition check

Approximately 13V L

Idle speed


I

Ilgnition switch "OFF"I 4

WIG


L

0- 1V


Ilgnition switch "OFF"I L

A few seconds after turning ignition switch "OFF" and thereafter



B/W

ECCS ground

Engine ground L

7

G/B

14

G/W

15

GY/L

23

G/R

Idle speed Approximately 13.5V

Data link connector for CONSULT

IEngine is running.1 L

Idle speed

LG/R

Approximately 2.5V Approximately OV


Approximately OV


L



IEngine is running.1 Approximately OV L



10

LG


t



IEngine is running.1 Approximately OV L

Cooling fan is operating at high speed.

IEngine is running.1 L 11

Y


Both A/C switch and blower fan switch are "ON".


switch is "OFF".

Approximately OV



B/W

Engine ground

ECCS ground L

Idle speed

EC-282

TROUBLE DIAGNOSIS - General Description [ill ECM Terminals and Reference Value (Conl'd) *Data are reference values. TERMINAL NO.

WIRE

ITEM

COLOR

*DATA

CONDITION IEngine is running.1 (Warm-up condition)

16

OR


L



L 17

W

Mass air flow sensor ground

1.7-2.1V Engine speed is 2,000 rpm.


L

Approximately OV Idle speed 0- 5.0V

18

BRIY


19

W



Output voltage varies with engine coolant temperature.


L

0- Approximately

1.OV

After warming up sufficiently

Ilgnition switch "ON"I (Warm-up condition) 20

Y


L

0.35 - 0.65V Accelerator pedal released


L

Approximately 4V Accelerator pedal fully depressed


22 30

B

Sensor's ground

L


Camshaft position L

sensor (Reference signal)


jlgnition switch "ON"! 24

ORIL

0.1 - O.4V

Approximately 1.5V





W

Knock sensor

L

Approximately 2.5V Idle speed


31 40

B

S/W

Sensor's ground Camshaft position sensor (Position sig-

L



2.0 - 3.0V

nal)

t


PUIR


Eng;ne "opped and ge., po,;!;on ;, "Neotral position". While rotating drive wheel by hand

Ilgnition switch "ON"! 34

BIY

Varies from 0 to 5V

Approximately OV

Start signal Ilgnition switch "START"I

EC-283

SATTERY VOLTAGE (11 - 14V)

•

TROUBLE DIAGNOSIS - General Description []:KJ ECM Terminals and Reference Value (Cont'd) *Data are reference values. TERMINAL NO.

WIRE COLOR

ITEM

*DATA

CONDITION /Ignition switch "ON'"

35

G/OR

t

Neutral position switch/lnhibitor

"N" or "P" position (A/T) Neutral position (M/T)

switch I'gnition switch "ON"I

L

Except the above gear position

I'gnition switch "OFF"I 36

B/R

OV

BATTERY VOLTAGE (11 - 14V) OV

Ignition switch BATTERY VOLTAGE


(11 - 14V) 37

P/L



38 47

W/R



39

B

ECCS ground

Approximately

5V

BATTERY VOL TAGE (11 - 14V)


L



L 41

G

Air conditioner

switch

Both air conditioner switch are "ON".

switch and blower fan


L

Air conditioner

switch is "OFF".

Approximately

OV



PUlW


L


L 46

W/L


48

B

ECCS ground

OV Steering wheel is being turned. 7 - 9V Steering wheel is not being turned.

I'gnition switch

"0FFj



109

W/L

Current return

101

RIB

Injector No. 1

103

G/B

Injector No.3

110

Y/B

Injector NO.2

112

LIB

Injector NO.4

L


Ilgnition switch "OFF"I




EC-284

TROUBLE DIAGNOSIS - General Description []K] ECM Terminals and Reference Value (Cont'd) 'Data are reference values. TERMINAL NO.

WIRE COLOR

CONDITION

ITEM

'DATA


L


Approximately OV


B/P

Fuel pump relay Ilgnition switch "ON"I

L 5 seconds

after turning ignition switch


"ON" and thereafter IEngine is running.1 105

P


. L Engine speed

0.6 - 0.8V is 4,000 rpm.


L


Idle speed

IEngine is running.j

107 B/Y

ECCS ground

108

L



OR


L

Approximately 0.2V Engine speed is below 3,200 rpm.


L Engine speed

is above 3,200 rpm.


IEngine is running.\

L

11 - 14V Idle speed

lEngine is running.1 113

SB

IACV-AAC valve ~

Sle«;ng wheel ;, be;ng I"med Air conditioner is operating. Rear window defogger switch is "ON". Lighting switch is "ON".

2 - 11V

!Engine is running.1

115

P/B

Torque converter clutch solenoid valve (A/T models)

L



L Vehicle

speed is 60 km/h (37 MPH) or more in "D" position



BIY

ECCS ground

L


EC-285

•

TROUBLE DIAGNOSIS FOR POWER SUPPL V Main Power Supply and Ground Circuit

EC-MAIN-01 7.5A

Refer to EL-POWER.

30A

OJ

[ill W!L d:::. (E10n I~I (MS)

Refer to EL-POWER.

W!L

*@

ST IGNITION SWITCH

~@ W!L

~

I

e----'--,

~

W/L

B/R

W/L

I

IT ]1

B/R

ECCS ~ RELAY

Ibi=Jl

Ibi=Jl

WIG

W/R

I

'--I W/L

W/L

WIG

14'61

h1~1

BATT

CRTN

m

SSOFF

d:::.(llii) I~I(]ID

B/R

@

+--~

ICDI@ =r@

B/R

I

W/R

W/R

B/R

';sl

\171

~

VB

VB

IGN SW

ECM (ECCS CONTROL

GNO

GNO

GND

GND

GND

GND

GND

-C

-C

-E

-E

-E

-I

-I

13.91 I~SI B

B

11~71 1I1~1

11~61

~

B/Y

B/Y

B/W

B/Y

MODULE)

em

~ B/W

L , I--i '-e-e-=e----lI I

I

I

.~ L, + * B

B

ill

CF13)

Acrn ~IIIllij @ T 3456

W

L

B B/Y

I

I

-: -:


Refer to last page (Foldout page) . ~

[mJID

(E114) W

em L

HEC002

EC-286

TROUBLE DIAGNOSIS FOR POWER SUPPLY []K] Main Power Supply and Ground Circuit (Co nt' d)

~i) Il

ECM

Er

CONNECTOR

INSPECTION START

II

36

No

Start engine. Is engine running?

--+

CHECK PL V-I.

POWER

SUP-

1. Turn ignition switch "ON".

Yes

2. Check voltage between ECM terminal @ and ground with CONSULT or tester. Voltage: Battery voltage If NG, check the following . • Harness connectors

MEC746B

~i) II

ECM

@,@

EfCONNECTORI!


~$

Lwt

OO,@l) • Harness for open or short between ECM and ignition switch If NG, repair harness or connectors. MEC714B

~OK

III


Il

ECM

~

CONNECTOR

II

38' 47

CHECK

"--.--'

POWER

SUPPL V.II.

1. Stop engine. 2. Check voltage between ECM terminals @l , (ill) and ground with CONSULT or tester. Voltage: Battery voltage MEC747BI

MEC748B



OO,@l) • 7.5A fuse • Harness for open or short between ECM and battery If NG, repair harness or connectors.

OK

CHECK

@

NG

--+ Check the following.

POWER

SUPPL V-III.

1. Turn ignition switch "ON" and then "OFF". 2. Check voltage between ECM terminals @, @ and ground with CONSULT or tester. Voltage: After turning ignition switch "OFF", battery voltage will exist for a few seconds, then drop to approximately QV.

OK

--+ Go to

III

"CHECK GROUND CIRCUIT" on next page.

Case-1: Battery voltage does not exist. Case-2: Battery voltage exists for more than a few seconds.

NG

Case-2 Case-1

EC-287

Go to [it "CHECK ECCS RELA Y" on next page.

•

TROUBLE DIAGNOSIS FOR POWER SUPPLY [gJ Main Power Supply and Ground Circuit (Cont'd) @

Ie

~IV ECM

~i5

E!'CONNECTORI!

+3

38.47

1 5

~

SEF460Q

I!] CHECK HARNESS CONTINUITY BETWEEN ECCS RELAY AND ECM 1. Disconnect ECM harness connector. 2. Disconnect ECCS relay harness connector. 3. Check harness continuity between ECM terminals @, @ and terminal @. Continuity should exist. If OK, check harness for short.

NG


@,@

OK

ts 2

CHECK VOLTAGE BETWEEN ECCS RELAY AND GROUND. Check voltage between terminals (!), @ and ground with CONSULT or tester. Voltage: Battery voltage

1

5

3

Ii

~i5 ECM

JO[CONNECTOR

•

II

4

AEC492

CHECK OUTPUT SIGNAL CIRCUIT. Check harness continuity between ECM terminal @ and terminal @. Continuity should exist. If OK, check harness for short.

CHECK ECCS RELAY. 1. Apply 12V direct current between relay terminals (!) and @. 2. Check continuity between relay terminals @ and @. 12V «(!) . @) applied: Continuity exists. No voltage applied: No continuity

COO, GID

SEF090M

II

ECM

.

~

OK Check ECM pin terminals for damage and check the connection of ECM harness connector.

II

CONNECTOR

6'13'39048'107'108'116

INSPECTION END

.

LEn

@,

• Harness for open or short between ECCS relay and battery If NG, repair harness or connectors.

NG


NG

Replace ECCS relay.

OK

CHECK GROUND CIRCUIT. 1. Turn ignition switch "OFF". 2. Loosen and retighten engine ground screws. 3. Disconnect ECM harness connector. 4. Check harness continulty between ECM terminals @, @, @, @, @, and engine ground. Continuity should exist. . If OK, check harness for short.

~15@a

NG

OK

[!1

III

III


OK

Ii AEC684


SEF461Q

EC-288

NG


TROUBLE DIAGNOSIS FOR OTC 11 Camshaft Position Sensor (CMPS) The camshaft position sensor is a basic component of the ECCS. It monitors engine speed and piston position. These input signals to the ECM are used to control fuel injection, ignition timing and other functions. The camshaft position sensor has a rotor plate and a waveforming circuit. The rotor plate has 360 slits for a 1" (POS) signal and 4 slits for a 180 (REF) signal. The wave-forming circuit consists of Light Emitting Diodes (LED) and photo diodes. The rotor plate is positioned between the LED and the photo diode. The LED transmits light to the photo diode. As the rotor plate turns, the slits cut the light to generate rough-shaped • pulses. These pulses are converted into on-off signals by the wave-forming circuit and sent to the ECM. 0

Rotor plate SEF6138

:£

1800 signal slit for NO.1 cylinder 10 signal slit

\\\\""I"~'11111

\\\\\

d'"

';\'0\

#'

I//..;:

/%

$

f

/11;

o 0

~ %

1800 signal slit

Rotor plate


SEF8638


Malfunction is detected when ....

No. 11

0

0

• Either 1 or 180 signal is not sent to ECM for the first few seconds during engine cranking. • Either r or 180" signal is not sent to ECM often enough while the engine speed is higher than the specified engine speed.

~

• Harness or connectors (The camshaft position sensor circuit is open or shorted.) • Camshaft position sensor • Starter motor (Refer to EL section.) • Starting system circuit (Refer to EL section.) • Dead (Weak) battery

• The relation between rand 180 signal is not in the normal range during the specified engine speed. 0


rif\

1)

~ 2) ----------

@

1) 2)

3)


Turn ignition switch "ON" and select "DATA MONITOR" mode with CONSULT. Start engine and run it for at least 2 seconds at idle speed. OR ---------Start engine and run it for at least 2 seconds at idle speed. Turn ignition switch "OFF", wait at least 7 seconds and then turn "ON". Perform "Diagnostic Test Mode II" (Self-diagnostic results) with ECM.

EC-289


[][]

EC-CMPS-01 Refer'

to

_.

EL-POWER.

Detectable line for' DTC Non-detectab Ie line for' DTC

-: W!L

I W!L Ifii'ii\ r=b\!JQ!, I~I

(MB)

W!L

,rID'@ =r='@


W!L

I

T-, W!L

u,,;J~1!.i=ll L

W!L

---

t

ECCS ~ RELAY

I!~I !bi=UI!.i=U

B!W

ern>

B

..."'J.

CEID

WIG W!R

.I--_. I

"

WIG W!R

@

l'" --- ....

rT

L

W!R

rhU3'sn~ SSOFF VB

JOINT CONNECTOR-6

VB

L

"

B!W

~==~--• B!W

12~1 13.01

Ii3'n1 1:0 I

REF REF

POS POS


em

(Ill I I~ 3456

@ W

T ~5

1

CF

3)

L

~

(11213415\6)

rn> ~@ GY ITIIIIIIIillI

B

...

B

B

1..1 J m m Refer to last page (Foldout page) .

GY

em L

HEC003

EC-290

TROUBLE DIAGNOSIS FOR OTC 11 Camshaft Position Sensor (CMPS) (Cont'd) DIAGNOSTIC

PROCEDURE

(DETECTABLE

[][]

CIRCUIT)

INSPECTIONSTART

CHECK POWER SUPPLY. 1. Turn ignition switch "OFF".

NG

2. Disconnect camshaft position sensor harness connector. 3. Turn ignition switch "ON".

If NG, repair harness or connectors.

4. Check voltage between terminal @ and ground with CONSULT or tester. Voltage: Battery voltage

SEF524Q

~i5

CHECK GROUND CIRCUIT. 1. Turn ignition switch "OFF". 2. Loosen and retighten engine ground screws. 3. Check harness continuity between terminal @ and engine ground. Continuity should exist. If OK, check harness for short.

NG

Repair harness or connector.

CHECK INPUT SIGNAL CIRCUIT. 1. Disconnect ECM harness connector.

NG

Repair harness or con-

@a

( 1121\'ij151~

SEF463Q

nectors.

2. Check harness continuity between terminal @ and ECM terminals @, @l, terminal @ and ECM terminals @,@. Continuity should exist. If OK, check harness for short.

[!J

~15 II

Check the following. • Harness for open or short between camshaft position sensor and ECCS relay

ECM 31.40 '-.,-J

ECONNECTORII

f

~15

mmJili) ~Q~

OK

CHECK COMPONENT (Camshaft position sensor). Refer to "COMPONENT INSPECTION" on next page.

~

OK

.---

[fiJ

.. -

SEF462Q

Disconnect and reconnect harness connectors in the circuit. Then retest. Trouble is not fixed. Check ECM pin terminals for damage and check the connection of ECM harness connector. Reconnect ECM harness connector and retest.

INSPECTIONEND

EC-291

NG

Replace camshaft position sensor.

•

TROUBLE DIAGNOSIS FOR DTC 11 Camshaft Position Sensor (CMPS) (Cont'd) COMPONENT

~i)ID

[][]

INSPECTION

Camshaft position sensor 1. Start engine. 2. Check voltage between camshaft position sensor terminals CID, @ and ground with AC range.

dID

AEC689

Condition

Terminal

Voltage (AC range)

Engine running at idle

@and ground @and ground

Approximately 2.7V'

*: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)

3. If NG, replace distributor assembly with camshaft position sensor. 4. Remove distributor cap. Visually check signal plate for damage or dust. After this inspection, diagnostic trouble code No. 11 might be displayed with camshaft position sensor functioning properly. Erase the stored memory.

SEF887K

EC.292

TROUBLE DIAGNOSIS FOR OTe 12 Mass Air Flow Sensor (MAFS)

SEF781K


The mass air flow sensor is placed in the stream of intake air. It measures the intake flow rate by measuring a part of the entire intake flow. It consists of a hot wire that is supplied with electric current from the ECM. The temperature of the hot wire is controlled by the ECM a certain amount. The heat generated by the hot wire is reduced as the intake air flows around it. The more air, the greater the heat loss. Therefore, the ECM must supply more electric current to maintain the temperature of the hot wire as air flow increases. The ECM detects the air flow by means of this current change .

Check Items


(Possible Cause)

• An excessively high or low voltage from the sensor • Harness or connectors is sent to ECM. (The sensor circuit is open or shorted.) • Mass air flow sensor


fiii\

1)

~ 2) 3)

Turn ignition switch "ON", and wait at least 6 seconds. Select "DATA MONITOR" mode with CONSULT. Start engine and wait at least 3 seconds.

----------

rR\


OR ----------

1)

~ 2) 3) 4)

Turn ignition switch "ON", and wait at least 6 seconds. Start engine and wait at least 3 seconds. Turn ignition switch "OFF", wait at least 7 seconds and then turn "ON". Perform "Diagnostic Test Mode II" (Self-diagnostic results) with ECM.

EC-293

•

TROUBLE DIAGNOSIS FOR DTC 12 Mass Air Flow Sensor (MAFS) (Coni' d)

[][]

EC-MAFS-01 Refer to EL-POWER.

-:

Oetectable line for DTG Non-detectable line for DTC

-: W!L

I

W!L

iETtITI

1Fst11~ ~@

W!R

W/L

,ctJ,@

W

3MASS AIR FLOW SENSOR

=r(ffi

W!L

I

T-,

lbjdJlbj:Jlm OR

W!L W!L

W

t

EGGS ~ RELAY

"

...1

I!~I 1ki=JI1'=i=!'@ WIG W!R

.I--_.... I

"

JOINT CONNEGTOR-6

( ....-m=_ ~=P:1 @

WIG W!R W!R

OR

wtilli1Bnd7n SSOFF VB

W

w=IT5il~

VB

QA+

QA-

ECM (EGCS CONTROL MODULE)

em

B

t...J 1

~III'fil em 3456

W

~

cn.g:oo

CDODDDJDJJJD

(ffi)


~@

BR

11 B

B

GY

em L

HEC004

EC-294

TROUBLE DIAGNOSIS FOR OTC 12 Mass Air Flow Sensor (MAFS) (Cont'd) DIAGNOSTIC

PROCEDURE

INSPECTION START

CHECK POWER SUPPLY. 1. Turn ignition switch "OFF". 2. Disconnect mass air flow sensor harness connector. 3. Turn ignition switch "ON". 4. Check voltage between terminal @ and ground with CONSULT or tester. Voltage: Battery positive voltage

~i5~0

NG


•

c:u:ffiD

MEC749B

CHECK GROUND CIRCUIT. 1. Turn ignition switch "OFF" 2. Disconnect ECM harness connector. 3. Loosen and retighten engine ground screws. 4. Check harness continuity between terminal @ and ECM terminal @. Continuity should exist. If OK. check harness for short.

CHECK INPUT SIGNAL CIRCUIT. Check harness continuity between terminal CD and ECM terminal @. Continuity should exist. if OK, check harness for short.

~I() ~Io 1='

II

=E=CM=B

CONNECTOR

CIIfJ1D

CHECK COMPONENT (Mass air flow sensor). Refer to "COMPONENT iNSPECTION" on next page.

17

OK


MEC751B

~i() II

ECM

'ECONNECTORII

~io (TIffiJ::J

Check ECM pin terminals for damage and check the connection of ECM harness connector. Reconnect ECM harness connector and retest.

16

INSPECTION END

MEC752B

EC-295

NG

NG

NG



Replace mass air flow sensor.

TROUBLE DIAGNOSIS FOR DTC 12 Mass Air Flow Sensor (MAFS) (Cont'd) ,

COMPONENT

INSPECTION

Mass air flow sensor 1, Turn ignition switch "ON", 2, Start engine and warm it up sufficiently, 3, Check voltage between terminal CD and ground, Conditions

MEC753B

Voltage V

Ignition switch "ON" (Engine stopped.)

Less than 1.0

Idle (Engine is warmed-up sufficiently.)

1.3 - 1.7

4, If NG, remove mass air flow sensor from air duct. Check hot wire for damage or dust.

SEF881K

EC-296

TROUBLE DIAGNOSIS FOR OTC 13 Engine Coolant Temperature

Sensor (ECTS)

The engine coolant temperature sensor is used to detect the engine coolant temperature. The sensor modifies a voltage signal from the ECM. The modified signal returns to the ECM as the engine coolant temperature input. The sensor uses a thermistor which is sensitive to the change in temperature. The electrical resistance of the thermistor decreases as temperature increases.

SEF594K

< Reference data>

20

19 9

6 4

~

2

~

1.0 0.8

1ij

'w

8!

Engine coolant temper-

Voltage (V)

Resistance (kQ)

-10 (14)

4.4

7.0-11.4

20 (68)

3.5

2.1 - 2.9

ature 'C ("F)

.

04 0.2 0.1

.20 0 20 40 60 80 100 (-4) (32) (68) (104)(140)(176)(212) Temperature 'C (OF)


Malfunction

50 (122)

2.2

0.68 - 1.00

90 (194)

0.9

0.236 - 0.260

SEF012P


is detected when ...

No. 13

• An excessively high or low voltage from the sensor is sent to ECM.


rF.i\

1) 2) 3) ---------1) ~ 2) ~

rm

3)

• Harness or connectors (The sensor circuit is open or shorted.) • Engine coolant temperature sensor


Turn ignition switch "ON". Select "DATA MONITOR" mode with Wait at least 5 seconds. OR ---------Turn ignition switch "ON" and wait at Turn ignition switch "OFF", wait at and then turn "ON". Perform "Diagnostic Test Mode II" results) with ECM.

EC-297

CONSULT.

least 5 seconds. least 7 seconds (Self-diagnostic

•


~ Sensor (ECTS)

EC-ECTS-01

~ENGlNE

COOLANT TEMPERATURE SENSOR @lID

4=U

Il:j.JJ BR/Y

B

I I

BR/Y ~

_.


-:

B

$--1--$ B

BR/Y U])

• t BR/Y

Ii1'sH TW

B

B

~

12-91

GND -A

GND -A


em

~

~~

@

L

~

GY

em L

HEC005

EC-298

TROUBLE DIAGNOSIS FOR DTC 13 Engine Coolant Temperature (Cont'd) DIAGNOSTIC

mJ Sensor (ECTS)

PROCEDURE

INSPECTIONSTART

m MEC7188A

CHECK POWER SUPPLY. 1. Turn ignition switch "OFF". 2. Disconnect engine coolant temperature sensor harness connector. 3. Turn ignition switch "ON".

NG

4. Check voltage between terminal @ and ground with CONSULT or tester. Voltage: . Approximately 5V

~io ~ SEF518Q

CHECK GROUND CIRCUIT. 1. Turn ignition switch "OFF". 2. Check harness continuity between terminal CD and engine ground. Continuity should exist. If OK, check harness for short.

~i5

OK

~

Check the following. • Harness for open or short between ECM and engine coolant temperature sensor • Harness connectors

@D,@) If NG, repair harness or connectors.

NG

Check the following. • Harness for open or short between ECM and engine coolant temperature sensor • Harness connectors

@D.@) If NG. repair harness or connectors.

CHECK COMPONENT

Replace engine coolant

(Engine coolant temperature sensor). Refer to "COMPONENT INSPECTION" on next page.

temperature sensor.

SEF519Q

OK



INSPECTIONEND

EC-299

•

TROUBLE DIAGNOSIS FOR DTC 13 Engine Coolant Temperature (Cont'd) COMPONENT

~ Sensor (ECTS)

INSPECTION

Engine coolant temperature sensor Check resistance as shown in the figure.

SEF152P

Temperature °C (OF)

Resistance kQ

20 (68)

2.1 - 2.9

50 (122)

0.68 - 1.00

90 (194)

0.236 - 0.260

If NG, replace engine coolant temperature sensor.

EC-300

TROUBLE DIAGNOSIS FOR DTC 21 Ignition Signal COMPONENT

DESCRIPTION

Ignition coil & power transistor (Built into distributor) The ignition coil is a small molded type. The ignition signal from the ECM is sent to the power transistor. The power transistor switches on and off the ignition coil primary circuit. As the primary circuit is turned on and off, the proper high voltage is induced in the coil secondary circuit.




• The ignition signal in the primary circuit is not sent • Harness or connectors to ECM during engine cranking or running. (The ignition primary circuit is open or shorted.) • Power transistor unit. • Resistor • Camshaft position sensor • Camshaft position sensor circuit



Note: If both DTC 11 and 21 are displayed, perform TROUBLE DIAGNOSIS FOR DTC 11 first. Refer to EC-289. (F.I\ 1) Turn ignition switch "ON". ~ 2) Select "DATA MONITOR" mode with CONSULT. 3) Start engine. (If engine does not run, turn ignition switch to "START" for at least 5 seconds.) ---------OR ---------~ 1) Turn ignition switch "ON". ~ 2) Start engine. (If engine does not run, turn ignition switch to "START" for at least 5 seconds.) 3) Turn ignition switch "OFF", wait at least 7 seconds and then turn "ON". 4) Perform "Diagnostic Test Mode II" (Self-diagnostic results) with ECM.

EC-301

•

TROUBLE DIAGNOSIS FOR DTC 21 Ignition Signal (Co nt' d)

EC-IGN/SG-01 Refer to EL-POWER.

30A

-:

OJ


-:

G

OFF

m ' ....

ST

IGNITION SWITCH
ACG

BIR

w+fl

~

BIR

t

db~ I~ICMID


IGNITION COIL

BIR IUJI@ =r
m

POWER TRANSISTOR

BIR

@

~~

~

W/B

G

I'

t

G

W

B/W

I'

.-

~

BIY

+

To EC"

(EGGS contra 1 module)

RESISTOR ~

2

GY/R

SPARK PLUG

W/B

m IGN

m IGN

ECM (EGCS CONTROL MODULE)

CK

L-

---l

r--------------------~ I I

~

tmIID

(E114)

W

fill I lfi] Cffi 3456

W

I

I:XI

CED

I I

BIY

n

B

B

t.J ! m m


m~@1

: (11213141516) I

GY

L

CZIID

GY

: I

~

(IT) L

HEC006

EC-302

TROUBLE DIAGNOSIS FOR DTe 21 Ignition Signal (Cont'd) DIAGNOSTIC

PROCEDURE

INSPECTION START

Turn ignition switch "OFF". and restart engine. Is engine running?

SEF010P

CHECK POWER SUPPLY. 1. Turn ignition switch "OFF". 2. Disconnect ignition coil harness connector. 3. Turn ignition switch "ON". 4. Check voltage between terminal (J) and ground with CONSULT or tester. Voltage: Battery voltage

Yes

NG



@,@D • Harness for open or short between ignition coil and ignition switch If NG, repair harness or connectors.

OK

AEC69a

~i5

@a

~ SEF4690

~iv II

ECM 'gCONNECTORII

CHECK GROUND CIRCUIT. 1. Turn ignition switch "OFF". 2. Disconnect power transistor harness connector. 3. Check harness continuity between terminal @ and engine ground. Continuity should exist. If OK. check harness for short.

CHECK INPUT SIGNAL CIRCUIT. 1. Disconnect ECM harness connector. 2. Check harness continuity between ECM terminal G) and power transistor terminal G). Continuity should exist. If OK. check harness for short.

~i5 (1!2IffllsI6)

NG



OK

CHECK COMPONENTS (Ignition coil, power transistor). Refer to "COMPONENT INSPECTION". EC-305. OK

SEF4700

NG


INSPECTION END

EC-303

NG


•

TROUBLE DIAGNOSIS FOR DTC 21 Ignition Signal (Cont'd) @

CHECK INPUT SIGNAL CIRCUIT. 1. Stop engine.

NG


NG

Replace resistor.

2. Disconnect ignition coil harness connector. 3. Strip tape covering resistor. 4. Disconnect ECM harness connector. 5. Check harness continuity between

(;J~i5

1

~~Q~ LllJ

ignition coil terminal CID and resistor terminal (!). resistor terminal @ and ECM terminal @. Continuity should exist.

~i5

If OK, check harness for short.

'Cf

~ OONNlliOR~

~i5 cffu

[ill SEF471Q

OK CHECK COMPONENT (Resistor). Refer to "COMPONENT INSPECTION" on next page.



INSPECTION END

EC-304

TROUBLE DIAGNOSIS FOR DTC 21 Ignition Signal (Cont'd) COMPONENT

INSPECTION

Ignition coil 1. 2.

meta/tip

Terminal

Resistance [at 25'C (77'F)]

(J) - @ (Primary coil)

0.5 - 1.0Q

(J) - @ (Secondary coil)

Approximately 25 kQ

For checking secondary coil, remove distributor cap and measure resistance between coil tower metal tip @ and terminal (f). If NG, replace distributor assembly as a unit.

AEC902

LCoiltower

Disconnect ignition coil harness connector. Check resistance as shown in the figure.

MEC719B

Power transistor 1. 2.

Disconnect camshaft position sensor & power transistor harness connector and ignition coil harness connector. Check power transistor resistance between terminals CID and @. Terminals

@ and @ If NG, replace

distributor

Resistance

Result

NotOQ

OK

on

NG

assembly.

Resistor 1. Disconnect resistor harness connector. 2. Check resistance between terminals CD and CID Resistance: Approximately 2.2 kQ [at 25°C (77°F» If NG, replace resistor.

EC-305

•

TROUBLE DIAGNOSIS FOR DTC 34 Knock Sensor (KS) The knock sensor is attached to the cylinder block. It senses engine knocking using a piezoelectric element. A knocking vibration from the cylinder block is sensed as vibrational pressure. This pressure is converted into a voltage signal and sent to the ECM.

PIEZO-ELEMENT SEF598K



Malfunction is detected when ....

• An excessively low or high voltage from the knock sensor is sent to ECM.


fiii\

• Harness or connectors (The knock sensor circuit is open or shorted.) • Knock sensor


1) Turn ignition switch "ON" and select "DATA MONITOR" mode with CONSULT. 2) Start engine and run it for at least 5 seconds at idle speed. ----------OR ----------1) Start engine and run it for at least 5 seconds at idle speed. 2) Turn ignition switch "OFF", wait at least 7 seconds and then turn "ON". 3) Perform "Diagnostic Test Mode II" (Self-diagnostic results) with ECM.

\J!}

EC-306

TROUBLE DIAGNOSIS FOR DTC 34 Knock Sensor (KS) (Cont'd)

EC-KS-01 -: -:

ECM (ECCS CONTROL MOOULE) (IT)

KNK 12'; I


•

W

f .--------. I I

I I I

I ,,:"

. I I

I

I I

I

w~ w @Z)

rn

fI • I I I I I I

I:: )

JOINT CONNECTOR-6 @

1

I I I I I

KNOCK SENSOR ~

~m> ~GY

~@

I.IIIIIIII1lII

GY

em L

HEC007

EC-307

TROUBLE DIAGNOSIS FOR DTC 34 Knock Sensor (KS) (Cont'd)

r\r~\ //\ \AY

,,~n~(

..("'~Inlake

DIAGNOSTIC

manifold

PROCEDURE

INSPECTION START

~

~ Loosen and retighten engine ground screws.

fa CHECK

INPUT SIGNAL


CIRCUIT.

1. Turn ignition switch "OFF". 2. Disconnect ECM harness connector and knock sensor harness connector. 3. Disconnect sub-harness connectors

@,@D. 4. Check harness continuity between terminal CD and ECM terminal @ . Continuity should exist. If OK, check harness for shorl. OK

m CHECK

\

MEC7568

fa

II

~15 ~15 ..

ECM

BCONNECTORII 27

~

SUB.HARNESS


CIRCUIT.

1. Disconnect knock sensor harness connector. 2. Check harness continuity between knock sensor harness connector terminal @ and knock sensor sub-harness connector terminal CD. Continuity should exist. If OK, check harness for shorl.

\ili:tV

OK CHECK COMPONENT (Knock sensor). Refer to "COMPONENT INSPECTION" below.

NG

Replace knock sensor.

OK

MEC757B


~~

Check ECM pin terminals for damage and check the connection of ECM harness connector. Reconnect ECM harness connector and retest,

\tiiliJ

INSPECTION END

COMPONENT

INSPECTION

Knock sensor • Use an ohmmeter which can measure more than 10 MO. 1. Disconnect knock sensor harness connector. 2. Check resistance between terminal @ and ground. Resistance: 500 - 620 kO [at 25°C (77°F)) CAUTION:

Do not use any knock sensors that have been dropped or physically damaged. Use only new ones. AEC719

EC-308

TROUBLE DIAGNOSIS FOR DTC 43 Throttle Position Sensor The throttle position sensor responds to the accelerator pedal movement. This sensor is a kind of potentiometer which transforms the throttle position into output voltage, and emits the voltage signal to the ECM. In addition, the sensor detects the opening and closing speed of the throttle valve and feeds the voltage signal to the ECM. Idle position of the throttle valve is determined by the ECM receiving the signal from the throttle position sensor. This one controls engine operation such as fuel cut. SEF089K

VI

~

.~

•

Supply voltage: 4.55V (Applied be~VoIee~_terminalsNO.1 and 3)

2

~L [f~.. L 1

~


&c

~M

g -g :; ~ 0.5

8~ 0.

00

-~---_.

90

Throttle valve opening angle (deg.)

Diagnostic Trouble Code No.

43


SEF520Q


• An excessively low or high voltage from the sensor • Harness or connectors is sent to ECM. (The sensor circuit is open or shorted.) • Throttle position sensor

EC-309

TROUBLE DIAGNOSIS FOR DTC 43 Throttle Position Sensor (Cont'd)

"*

*

MONITOR

THRTL pas SEN

I-

0

NO FAIL

0.48V

I~-----..l

~-R-E-CO-R-D-~I SEF477Q

THFm.

NG data pos SEN

'~U.'3

•

00"00

~v

~:'

OK data pos SEN

~~~'3. 1

•...•..•..• 1 THRTl ~~~

THRTL 15:38

~~~ (V)

(V) 00"36 00"37 00"38 00"39 00"41 00"42 00"43

OO~

'g;v :":'

................. 1

")

15:38

THRTL

214 2.20 2.26 2.32 2.26 2.20 2.58

00"46 00"47 00"48 00"49 00"50 00"51 00"52

2.88 3.00 3.12 3.24 3.34 3.46 3.56

SEF267Q

~i)

II

LelJ

ECM

El'coNNEcTORII

OVERALL FUNCTION CHECK Use this procedure to check the overall function of the throttle position sensor. During this check, a DTC might not be confirmed. rij\ 1) Turn ignition switch "ON". ~ 2) Select "MANU TRIG" and "HI SPEED" in "DATA MONITOR" mode with CONSULT. 3) Select "THRTL POS SEN" in "DATA MONITOR" mode with CONSULT. 4) Press RECORD on CONSULT SCREEN at the same time accelerator pedal is depressed. 5) Print out the recorded data and check the following: • The voltage when accelerator pedal fully released is approximately 0.35 - 0.65V . • The voltage rise is linear in response to accelerator pedal depression . • The voltage when accelerator pedal fully depressed is approximately 4V. ---------OR ---------1) Turn ignition switch "ON", 2) Check the voltage between ECM terminals @J and @, @ (ground) and check the follOWing: • The voltage when accelerator pedal fully released is approximately 0.35 - 0.65V. • The voltage rise is linear in response to accelerator pedal depression. • The voltage when accelerator pedal fully depressed is approximately 4V,

(9"oodl

MEC7228

EC-310

TROUBLE DIAGNOSIS FOR DTC 43 Throttle Position Sensor (Cont'd)

EC-TPS-01

--

THROTTLE POSITION SENSOR @

-:


•

1I

(

I

t

I~ I

~

I I I I I

I

I I I I I I I I I I I I I I I I

I

I

I

'::::

t P/L

.i~.

JOINT CONNECTOR-6 @ ~

~

~

Y

B

B

13-71 12.01

~

12-91

AVCC

GND -A

GND -A

TVO

B


CED

tJ m1

0:13)

~@

~@

n

B B

BR

IIIillIIIIIIl

GY

CED L

HECOOB

EC-311

TROUBLE DIAGNOSIS FOR DTC 43 Throttle Position Sensor (Cont'd) DIAGNOSTIC

PROCEDURE

INSPECTION START

MEC723B

CHECK POWER SUPPLY. 1. Turn ignition switch "OFF". 2. Disconnect throttle position sensor harness connector. 3. Turn ignition switch "ON". 4. Check voltage between terminal (1) and ground with CONSULT or tester. Voltage: Approximately 5V

NG


OK

CHECK GROUND CIRCUIT. 1. Turn ignition switch "OFF". 2. Loosen and retighten engine ground screw. 3. Check harness continuity between terminal @ and engine ground. Continuity should exist. If OK, check harness for short.

NG

Check the following. • Harness for open or short between ECM and throttle position sensor If NG, repair harness or connectors.

SEF480Q

OK

,,~n~7 r~r~ \ n\ \!Y -z~lntake

[L~

CHECK INPUT SIGNAL CIRCUIT. 1. Disconnect ECM harness connector. 2. Check harness continuity between ECM terminal @) and terminal @. Continuity should exist. If OK, check harness for short.

manifold

NG

Repair harness or connectors

OK

ADJUST THROTTLE POSITION SENSOR.

Perform "Basic Inspection", EC-271. OK

CHECK COMPONENT (Throttle position sensor). Refer to "COMPONENT INSPECTION" on next page.

~io

OK

•


~


SEF481Q

~io II

ECM

~CONNECTORII

~i5


o::fl\]) INSPECTION END

20

SEF482Q

EC-312

NG

Replace throttle position sensor. To adjust it, perform "Basic Inspection", EC-271.

TROUBLE DIAGNOSIS FOR DTC 43 Throttle Position Sensor (Cont'd) COMPONENT

INSPECTION

Throttle position sensor 1. 2.

Disconnect throttle position sensor harness connector. Make sure that resistance between terminals @ and changes when opening throttle valve manually. Throttle valve conditions

Completely closed

Resistance [at 25'C (77'Fl) Approximately

Partially open MEC7248

Completely open

1 kQ

1 - 10 kQ Approximately

If NG, replace throttle position sensor. To adjust it, perform "Basic Inspection",

EC-313

CID

10 kQ

EC-271.

•


ITEMS

[][]

Vehicle Speed Sensor (VSS)

_.

IGNITION SWITCH ON 01" START

-:

Refer to EL-POWER.

FUSE BLOCK

10A

[]]

EC-VSS-01 Detectable line for DTC Non-detectable line for DTC

(,JIB)

~


~

,!1J-

R/Y .j~ R/Y 1'TIO\1iETt\i\ ~11E:w'l\ ~

@r

@

R

R/Y i4~VEHICLE ) SPEED I 'C!Qy ~ I\Ee!6I (SENSOR ,~ R , [iJ- R ~ @@

@) ~

PU/R

I

PU/R/U"Arn r=:b~ I~I@

PUIR

I

PU/R

13'21 VSP


BIR

em

-!@

r---------------------------------~ Refer to last page (Foldout page) .

~@@

tW

GY

~---------------------------------~ ~~

mz:rnJ

B

CID L

HEC009

EC-314

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS Vehicle Speed Sensor (VSS) (Conl'd) COMPONENT

Vehiclespeed sensor

DESCRIPTION

The vehicle speed sensor is installed in the transaxle. It contains a pulse generator which provides a vehicle speed signal to the speedometer. The speedometer then sends a signal to the ECM.

AEC110

DIAGNOSTIC

• V~HICLE SPEED SEN CKT. AFTER TOUCH START. DRIVE VEHICLE AT lOkm!h (6mph) OR MORE WITHIN 15 see

L---

__

INSPECTION START

'~----'

-1I=~_s-T_A~R=T==

-N-EX-T

MEF559D

*

MONITOR

*

VHCL SPEED SE PIN POSI SW

•

PROCEDURE

NO FAIL

0

20kmlh OFF

CHECK OVERALL FUNCTION. 1. Jack up drive wheels. 2. Perform "VEHICLE SPEED ~ SEN CKT" in "FUNCTION

OK

INSPECTION END

fi\

rif\ ~

TEST" mode with CONSULT. OR 2. Read "VHCl SPEED SE" signal in "DATA MONITOR" mode with CONSULT. CONSULT value should be the same as the speedometer indication. OR

2. Turn ignition switch "ON".

RECORD SEF941N

~

~£) 1='

=E=CM=-g 32

terminal @ and body ground. Voltage should vary between

f?Ft::J:. ~

CONNECT

~~ CONNECTOR

II

3. Rotate drive wheel by hand. 4. Check voltage between ECM

approx. 0 - 5V.

~ ~l

NG

CHECK SPEEDOMETER FUNCTION. Make sure that speedometer functions properly. OK MEC3238

NG

Check vehicle speed sensor and circuit. (Refer to "Inspection! Speedometer and Vehicle Speed Sensor" of "METER AND GAUGES" in El section.)

@

EC-315

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS Vehicle Speed Sensor (VSS) (Cont'd) @

ECM

@I CONNECTOR I 32

CHECK INPUT SIGNAL CIRCUIT. 1. Turn ignition switch "OFF". 2. Disconnect ECM harness connector

MEC7598

and combination meter harness connector. 3. Check harness continuity between ECM terminal @ and terminal @. Continuity should exist. If OK, check harness for short. OK


INSPECTION END

EC-316

NG


CID,@ • Harness for open or short between ECM and combination meter If NG, repair harness or connectors.


ITEMS

Start Signal

EC-S/SIG-01

Refer

to

EL-POWER.

-:


-: ST

IGNITION SWITCH (E114)

7.5A

1261

•

FUSE BLOCK

(JIB)

~

IN.41

(E106)

BIY

I

BIY r=:b (M49)

I!¥JI CEID BIY

I

SlY ~ ST MTR


em

@15f1l

(E114)

@gN]

w


em L

HEC010

EC-317

TROUBLE DIAGNOSIS FOR NON-DETECTABLE Start Signal (Cont'd) DIAGNOSTIC •

START

SIGNAL

ITEMS

PROCEDURE

CKT •

INSPECTION START 1 2

CLOSE THROTILE, SHIFT TO P OR N RANGE TOUCH START AND

fa

START ENGINE IMMEDIATELY

CHECK OVERALL FUNCTION. 1, Turn ignition switch "ON", ~ 2, Perform "START SIGNAL CKT" in "FUNCTION TEST" mode with CONSULT,

OK

INSPECTION END

(ij\

II

NEXT

START SEF191L

fa

-(:( MONITOR

-(:( NO FAIL

STARTSIGNAL CLSDTH/PSW

___

~

0

OFF ON OFF ON

AfRCONDSIG PIN POSI SW

I

RE_C_O_R_D __

SEF111P

~i3 II

ECM

E[CONNECTORII

OR

1, Turn ignition switch "ON", 2, Check "START SIGNAL" in "DATA MONITOR" mode with CONSULT, IGN "ON"

OFF

IGN "START"

ON

OR 1, Turn ignition switch to "START", 2 Check voltage between ECM terminal @ and ground, Voltage: Ignition switch "START" Battery voltage Exceplabove Approximately OV

34

~ MEC725B

~15 ECM

rif\

~CONNECTORI 34

~

CHECK INPUT SIGNAL CIRCUIT. 1, Turn ignition switch "OFF", 2, Disconnect ECM harness connector and ignition switch harness connector, 3, Check harness continuity between ECM terminal @ and terminal @, Continuity should exist. If OK, check harness for short

t:1tlliJ

OK

Disconnect and reconnect-harness connectors in the circuit Then retest Trouble is not fixed, MEC760B

Check ECM pin terminals for damage and check the connection of ECM harness connector, Reconnect ECM harness connector and retest

INSPECTION END

EC-318

NG

Check the following, • Harness connectors

@,@ • 7,5A fuse • Harness for open or short between ECM and ignition switch If NG, repair harness or connectors,


ITEMS

Exhaust Gas Recirculation (EGR) Valve and EVAP Canister Purge Control SYSTEM DESCRIPTION

I I I


I Engine speed


I Amount of intake air


~Engine coolant temperature

I Start signal

I Ignition switch



I

This system cuts and controls vacuum applied to EGR valve and EVAP canister to suit engine operating conditions. This cut-and-control operation is accomplished through the ECM and the EGR valve & EVAP canister purge control solenoid valve. When the ECM detects any of the following conditions, current flows through the solenoid valve. This causes the port vacuum to be discharged into the atmosphere. The EGR valve and EVAP canister remain closed.

•

•

• • •

•

COMPONENT

Low engine coolant temperature Engine starting High-speed engine operation Engine idling Excessively high engine coolant temperature Mass air flow sensor malfunction

DESCRIPTION

EGR valve The EGR valve controls the amount of exhaust gas routed to the intake manifold. Vacuum is applied to the EGR valve in response to throttle valve opening. The vacuum controls the movement of a taper valve connected to the vacuum diaphragm in the EGR valve.

SEF783K

EGRC-BPT valve The EGRC-BPT valve monitors exhaust pressure to activate the diaphragm, controlling throttle body vacuum applied to the EGR valve. In other words, recirculated exhaust gas is controlled in response to positioning of the EGR valve or to engine operation.

Exhaust pressure

SEF529K

EGR valve & EVAP canister purge control solenoid valve The EGR valve & EVAP canister purge control solenoid valve

~ Vacuum signal

responds to signals from the ECM. When the ECM sends an ON (ground) signal, the coil in the solenoid valve is energized. A plunger will then move to cut the vacuum signal (from the throttle body to the EGR valve and EVAP canister purge valve). When the ECM sends an OFF signal, the vacuum signal passes through the solenoid valve. The signal then reaches the EGR valve and EVAP canister.

SEF240PE

EC-319

•

[ill

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS Exhaust Gas Recirculation (EGR) Valve and EVAP Canister Purge Control (Cont'd)

EC-EGRC/V-01

FUSE BLOCK

Refer to EL-POWER.

(JIB)

SR

1[~]1 @

=r= BR

-:

Detectable

-:


for DTC

em

line

I

1!1~~~p v~k~iS~EA BR

PURGE CONTROL SOLENOID

II 111VALVE

=r=
I

P

rrfo5u EGR


em

[!j

3456I I

'fil

(ffi W


~
Cill L

HECD14

EC-320

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS Exhaust Gas Recirculation (EGR) Valve and EVAP Canister Purge Control (Cont'd) DIAGNOSTIC

[1[J

PROCEDURE

INSPECTION START

m MEF637B

CHECK OVERALL FUNCTION. 1. Start engine and warm it up sufficiently. 2. Perform diagnostic test mode II (Self-

INSPECTION END

~

•

diagnostic results). Make sure that Diagnostic trouble code No. 12 is not displayed. 3. Keep engine speed at about 2,000 rpm. Make sure that EGR valve spring moves up and down when engine is raced to about 4,000 rpm.

~)5

(Use your finger.)

~~II

EGRC-BPT valve ~~uu~

NG

hose

connected to EGR valve~ (

~

'

MEC761B

m CHECK VACUUM SOURCE TO EGR VALVE. 1. Disconnect vacuum hose to EGR valve. 2. Disconnect vacuum hose to EVAP

OK

----..

canister. 3. Check vacuum existence under the following conditions. Engine speed is 4,000 rpm: Vacuum should not exist. Engine speed is 2,000 rpm: Vacuum should exist.

CHECK COMPONENTS (EGR valve and EGRCBPT valve). Refer to "COMPONENT INSPECTION", EC-323 NG


NG

[!J r----,

II

ECM

~

~ CONNECTORIIl.imJ

CONNECT

£)

CHECK CONTROL FUNCTION. Check voltage between ECM terminal @ and ground under the following conditions. Engine speed is 4,000 rpm

105

+

(!]

[!J

-

MEF955D

0.6 - O.BV Engine speed is 2,000 rpm Battery voltage ~NG

Clogging

::::.S.-

~P"P"

'00","'00 MEF521E

EC-321

OK

-----.-

CHECK VACUUM HOSE. Check vacuum hose for clogging, cracks or improper connection.

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS Exhaust Gas Recirculation (EGR) Valve and

_~

~EVAPcanis:r

\

~GR valve & EVAP canister control solenoid valve harness connector

------

,----,

-----

I

I

\

.

\

\ MEC7638

Purge Control (Cont'd)

CHECK POWER SUPPLY. 1. Stop engine. 2. Disconnect EGR valve & EVAP canister purge control solenoid valve harness connector. 3. Turn ignition switch "ON". 4. Check voltage between terminal @ and ground. Voltage: Battery voltage

CHECK OUTPUT SIGNAL CIRCUIT. 1. Turn ignition switch "OFF". 2. Disconnect ECM harness connector. 3. Check harness continuity between ECM terminal (ill) and terminal CD. Continuity should exist. If OK, check harness for short. MEC7648

~i5 1=1 =E=CM=-g 105

MEC7658

OR

(F./) ~ •

EGR CONT S/V CIRCUIT. DOES THE SOLENOID VALVE MAKE

~ ~

AN OPERATING SOUND

3. Turn EGR valve & EVAP canister purge control solenoid valve "ON" and "OFF" in "ACTIVE TEST" mode with CONSULT and check operating sound. OR Refer to "COMPONENT INSPECTION" on next page.

EVERY 3 SECONDS? OK NEXT

II

NO

II

I

YES

MEF5698

•

ACTIVE TEST.

EGRC SOL/V

Disconnect and reconnect harness connectors in the circuit. Then retest. Trouble is not fixed .

0

0N

== = MONITOR = Orpm == CMPS.RPM (REF)


INSPECTION END

ON

I_I


QD,@ • 10A fuse • Harness open or short between EGR valve & EVAP canister purge control solenoid valve and fuse If NG, repair harness or connectors.

NG


OK

CHECK COMPONENT (EGR valve & EVAP canister purge control solenoid valve). (ij\ 1. Reconnect ECM harness con~ nector and EGR valve & EVAP canister purge control solenoid valve harness connector. 2. Turn ignition switch "ON". 3. Perform "EGRC SOLIV CIRCUIT" in "FUNCTION TEST" mode with CONSULT.

CONNECTOR II

NG

OFFl clEF353F

EC-322

NG

Replace EGR valve & EVAP canister purge control solenoid valve.

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS []:[] Exhaust Gas Recirculation (EGR) Valve and EVAP Canister Purge Control (Cont'd) COMPONENT

o

INSPECTION

EGR valve & EVAP canister purge control solenoid valve 1. 2.

Disconnect EGR valve & EVAP canister purge control solenoid valve harness connector. Check solenoid valve, following the table as shown below:

Conditions NEF071

Air passage

Air passage



Yes

No

No

Yes


.

No supply

If NG, replace EGR valve solenoid valve.

& EVAP canister

purge control

EGR valve Apply vacuum to EGR vacuum EGR valve spring should lift. If NG, replace EGR valve.

port with a hand vacuum pump.

SEF820FB

EGRC-BPT valve Plug one of two ports of EGRC-BPT valve. Apply a pressure above 0.490 kPa (4.90 mbar, 50 mmH20, 1.97 inH20) to check for leakage. If a leak is noted, replace valve.

t SEF807K

EC-323

•


[]B]

ITEMS

Injector

EC-INJECT-01 -:


-:

Refer to EL-POWER. G

m OFF

ST

'e-

IGNITION SWITCH

ACC

~

BIR

1~I(E101)

BIR (][)

i4J@ B/R@

I

e,----e----e----I I I I

BIR

BIR

(~:1 ~I INJECTOR NO.1 (ffi)

I4=JJ

I4=JJ

RIB

tm:lID

W

INJECTOR NO.2

rn

BIR

(€ :1 ~I INJECTOR NO.3 @

I4=JJ

Y/B

I

~~

BIR

I4=JJ

GIB

I

I

I

Y/B

GIB

LIB

~

11~ol

11~31

11~21

INJ

INJ

INJ

INJ

#1

#2

#3

#4

3456

ffi

LIB

RIB

f!l' I IfiJ

NO.4 INJECTOR


Refer to last page @

W

~ (ffi) ffi) •~

@

B

I

B

B

I

(Foldout page) .

ffi B

em L

HEC011

EC-324

TROUBLE DIAGNOSIS FOR NON-DETECTABLE Injector {Co nt' d) COMPONENT

ITEMS

DESCRIPTION

The fuel injector is a small, precise solenoid valve. When the ECM supplies a ground to the injector circuit, the coil in the injector is energized. The energized coil pulls the needle valve back and allows fuel to flow through the injector into the intake manifold. The amount of fuel injected depends upon the injection pulse duration. Pulse duration is the length of time the injector remains open. The ECM controls the injection pulse duration based on engine fuel needs. SEF596K

•

ACTIVE TEST.

0

DIAGNOSTIC

•

INSPECTIONSTART

••• POWER BALANCE •••

===

PROCEDURE

= ==

MONITOR CMPS.RPM(REF) 737rpm MAS AIR/FL SEN O.98V IACV-AACjV 41%

CHECK OVERALL FUNCTION. 1. Start engine. ~ 2. Perform "POWER BALANCE" in "ACTIVE TEST" mode with CONSULT. 3. Make sure that each circuit produces a momentary engine speed drop. OR ~ 1. Start engine. ~ 2. Listen to each injector operating sound. Clicking noise should be heard.

OK

CHECK POWER SUPPLY. 1. Stop engine. 2. Disconnect injector harness connector. 3. Turn ignition switch "ON". 4. Check voltage between injector harness connector terminal @ and ground with CONSULT or tester. Voltage: Battery voltage

NG

INSPECTION END

(ij\

110Q]~~ DDDDL:::J

MEF354F

I~~

Click

Ct.

I~-+

--

/1 SEF730L

OK

@

MEF960A

AEC755

EC-325



@, • Harness for open or short between injector and ignition switch If NG, repair harness or connectors.

TROUBLE DIAGNOSIS FOR NON-DETECTABLE Injector (Cont'd)

ITEMS

@

~i5 II

ECM

-g

CONNECTOR

II

~i5 illb

\101'110:103'112,

@: NO.1 cylinder @ :No.3cylinder <::DQ): No.2cylinder @): No.4cylinder

1

CHECK OUTPUT SIGNAL CIRCUIT. 1. Turn ignition switch "OFF". 2. Disconnect ECM harness connector. 3. Check harness continuity between injector harness connector terminal G) and ECM terminals @. Gill,


GID. Gill. SEF485Q

Continuity should exist. If OK, check harness for short. OK

NG

CHECK COMPONENT (Injector). Refer to "COMPONENT INSPECTION" below.

Replace injector.

OK

Disconnect and reconnect harness connectors in the circuit. Then retest. ~ Trouble is not fixed. Check ECM pin terminals for damage and check the connection of ECM harness connector. Reconnect ECM harness connector and retest.

INSPECTION END

COMPONENT

INSPECTION

Injector 1. Disconnect injector harness connector. 2. Check resistance between terminals as shown in the figure. Resistance: 10 - 140 [at 25 (77°F)] If NG, replace injector. 0

AEC559

EC-326


ITEMS

Fuel Pump SYSTEM DESCRIPTION

I Camshaft position sensor

I Engine speed

~ ECM (ECCS control module)

Start signal !,gnition

switch

I

The ECM activates the fuel pump for several seconds after the ignition switch is turned on to improve engine startability. If the ECM receives a 180 signal from the camshaft position sensor, it knows that the engine is rotating, and causes the pump to perform. If the 180 signal is not received when the ignition switch is on, the engine stalls. The ECM stops pump operation and prevents battery discharging, thereby improving safety. The ECM does not directly drive the fuel pump. It controls the ON/OFF fuel pump relay, which in turn controls the fuel pump. 0

Fuel pump relay

Condition

Fuel pump operation

Ignition switch is turned to "ON"

Operates for 5 seconds

Engine running and cranking

Operates

0


Stops in 1 second


Stops

COMPONENT

DESCRIPTION

The fuel pump with a fuel damper is an in-tank type (the pump and damper are located in the fuel tank).

AECB01

EC-327

•

TROUBLE DIAGNOSIS FOR NON-DETECTABLE Fuel Pump (Cont'd)

[]K]

ITEMS

EC-F/PUMP-01 IGNITION SWITCH ON 01"' START

-:

Detectable line tal"' DTC Non-detectable line tal"' DTC

-:

15A

FUSE BLOCK

IJI)

ReteI"'

to

EL-POWER.

(JIB) (M15)

UN•61 I N.61

II!]I(UEL B/L

B/W

n

U

PUMP RELAY

Ibi=JlIbiJCHD B/P

B/Y

1

B/Y

~

~ B/Y

----_1

(@ (]I) B/Y

m ~@ B

1

M

B/P r=b~ ~

~

B/P

m@ B

I

B/P

~

,-, B

~ FPR

I


(ffi

L

TANK

GAUGE UNIT (B17)

~

I~I@

A
FUEL FUEL PUMP

FillJ@

m

w

B

B

...L

...L

(811) (832)

~@ 0.J.g)


~@ I..!.@J

(ffi L

HEC012

EC-328

TROUBLE DIAGNOSIS FOR NON-DETECTABLE Fuel Pump (Conl'd) DIAGNOSTIC

ITEMS

PROCEDURE

INSPECTION START

CHECK OVERALL FUNCTION. 1. Turn ignition switch "ON". 2. Pinch fuel feed hose with fingers. Fuel pressure pulsation should be felt on the fuel feed hose for 5 seconds aller ignition switch is turned "ON".

~

INSPECTION END

NG

m

.

CHECK POWER SUPPLY. 1. Turn ignition switch "OFF". 2. Disconnect fuel pump relay. 3. Turn ignition switch "ON". 4. Check voltage between terminals @ and ground with CONSULTor

NG

~

CD,

tester. Voltage: Battery voltage

Check the following. • 15A fuse • Harness for open or short between fuse and fuel pump relay If NG, repair harness or connectors.

OK

[!l CHECK POWER AND GROUND CIRCUIT. 1. Turn ignition switch "OFF".

SEF479P

Under the rear seat

NG

~

@,Cill

2. Disconnect fuel pump harness connector. 3 Check harness continuity between terminal @ and body ground, terminal CD and fuel pump relay connector terminal @. Continuity should exist. If OK, check harness for short.

"---

Check the following. • Harness connectors • Harness for open or short between fuel pump and body ground • Harness for open or short between fuel pump and fuel pump relay If NG, repair harness or connectors.

OK

I!]

o

MEC267BA

CHECK OUTPUT SIGNAL CIRCUIT. 1. Disconnect ECM harness connector. 2. Check harness continuity between ECM terminal Gill and fuel pump relay connector terminal @. Continuity should exist. If OK, check harness for short. ~OK

EC-329

NG

~


@,QD • Harness for open or short between ECM and fuel pump relay If NG, repair harness or connectors.

•

TROUBLE DIAGNOSIS FOR NON-DETECTABLE Fuel Pump (Coni' d)

~i5 II

ECM

B

CONNECTOR

ITEMS

@

1

II

CHECK COMPONENT (Fuel pump relay).

104

(ij\ ~

MEC332B

D

• ACTIVE TEST. FUEL PUMP RELAY

NG

Replace fuel pump relay.

NG

Replace fuel pump.

1. Reconnect fuel pump relay, fuel pump harness connector and ECM harness connector. 2. Turn ignition switch "ON". 3. Turn fuel pump relay "ON" and "OFF" in "ACTIVE TEST" mode with CONSULT and check operating sound.

ON

OR

fti>\

=CMPS.RPM(REFj = = MONITOR ---

~

Orpm

Refer to "COMPONENT INSPECTION" on next page. OK

_o_N_I_'

OFF

I

MEF309F

CHECK COMPONENT (Fuel pump). Refer to "COMPONENT INSPECTION" on next page. OK Disconnect and reconnect harness connectors in the circuit. Then retest. Trouble is not fixed. Check ECM pin terminals for damage and check the connection of ECM harness connector. Reconnect ECM harness connector and retest.

INSPECTION END

EC-330

TROUBLE DIAGNOSIS FOR NON-DETECTABLE Fuel Pump (Conl'd) COMPONENT

=

ITEMS

INSPECTION

Fuel pump relay Check continuity

between terminals Conditions

CID and @.). Continuity


Yes

No current supply

No

If NG, replace

relay.

SEF511P

Fuel pump 1. Disconnect fuel pump harness connector. 2. Check resistance between terminals CD and @. . Resistance: 0.2 - 5.0n [at 25°C (77°F)] If NG, replace fuel pump.

EC-331

•


ITEMS

Idle Air Control Valve (IACV)-Air Regulator SYSTEM

DESCRIPTION Engine speed

Camshaft

position sensor ECM (ECCS control module)

Start signal Ignition switch

The IACV-air regulator is controlled by the ECM at the same time as fuel pump ON-OFF control.

Condition

IACV-air regulator operation

Ignition switch is turned to "ON"

Operates for 5 seconds

Engine running and cranking

COMPONENT Bimetal

...

Air flow

IACV-air regulator

Operates


OFF in 1 second


OFF

DESCRIPTION

IACV-air regulator provides an air bypass when the engine ;s cold for a fast idle during warm-up. A bimetal, heater and rotary shutter are built into the IACV-air regulator. When the bimetal temperature is low, the air bypass port opens. As the engine starts and electric current flows through a heater, the bimetal begins to turn the shutter to close the bypass port. The air passage remains closed until the engine stops and the bimetal temperature drops.

SEF095K

EC-332

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS Idle Air Control Valve (IACV)-Air Regulator (Cont'd)

[]:[]

EC-AIRREG-01 IGNITION SWITCH ON or START 15A

[ill

<:E>: :

FUSE BLOCK

AIT models MIT models ... : Detectable line for DTC ---: Non-detectable line for DTC

Refer to EL-POWER.

(JIB)

IN.61IN•61 B/L

I I

IT B/L

•

14> ~

B/W

B/W

n PUMP I~IIFCEL U RELAY

B/Y

r=b@})

B/Y

r-!-,

I~ICHID

~(E203)

~(E20t)

B/Y

B/Y

B/Y

IbJdlIbiJlCBD B/P B/Y

t

B/Y

@

,..-!-,

@

t_f I

B/Y

BIP

rn B

I

IllJl C£[)

B

1$1(ffi)

B/P

(E227)

I

B

B/P ~

FPR


ffiill@W

~(E203) L

rnrn:tzlID

Clli:4)

1

~

tG"Ai'\\

d:::,~

ACBD T

IACV-AIR REGULATOR

GY

~B

In fJ 1 mm B B B


.r.'T;:;,.. (Eli 4) LJ...1J£p GY

CHID , (EJon ~

~@ ~GY

em L

HEC013

EC-333

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS Idle Air Control Valve (IACV)-Air Regulator (Cont'd) DIAGNOSTIC

~

PROCEDURE

INSPECTION START

I

CHECK CONTROL FUNCTION. 1. Turn ignition switch "ON". 2. Pinch fuel feed hose with fingers. Fuel pressure pulsation should be felt on the fuel feed hose for 5 seconds after ignition switch is turned "ON".

1

NG

~

Check fuel pump control circuit. (See page EC-327.)

0K

I;)

CHECK POWER SUPPLY. 1. Turn ignition switch "OFF". 2. Disconnect IACV-air regulator harness connector. 3. Turn ignition switch "ON". 4. Check voltage between terminal G) and ground. Battery voltage should exist for 5 sec. onds after ignition switch is turned "ON".

I

NG

~

@,@}) • Harness connectors @D, (M/T models) • Harness connectors @, @ (A/T models) • Harness for open or short between IACV-air regulator and fuel pump relay If NG, repair harness or connectors.

OK

~15

CHECK GROUND CIRCUIT. 1. Turn ignition switch "OFF". 2. Check harness continuity between terminal @ and body ground. Continuity should exist. If OK, check harness for short.

~

OK

MEC7368

~

~15

CHECK COMPONENT (IACV-air regulator). Refer to "COMPONENT INSPECTION" below.


NG


Cill), @ID • Harness for open or short between IACV-air regulator and body ground If NG, repair harness or connectors.

Replace IACV-air regulator.

OK. INSPECTION END

~ ~

MEC7378

COMPONENT IACV-air

INSPECTION

regulator

Disconnect IACV-air regulator harness connector. • Check IACV-air regulator resistance. Resistance: Approximately 70 • 80n [at 25°C (77°F)) • Check IACV-air regulator for clogging.

EC-334


ITEMS

Idle Air Control Valve (IACV) Control (AAC) Valve

SYSTEM DESCRIPTION

Engine speed


Auxiliary Air

~

I Amount of intake air


I Engine coolant temperature


I

•

Start signal

Ignition switch

I Throttle "position

Throttle position sensor I

Park/Neutral position

Inhibitor switch (A/T models)/ Neutral position switch (M/T models)


!

IACV-AAC valve

I





I Battery

Battery voltage

Vehicle speed


I

l

Cooling fan operation

Cooling fan

I

This system automatically controls engine idle speed to a specified level. Idle speed is controlled through fine adjustment of the amount of air which bypasses the throttle valve via IACV-AAC valve. The IACV-AAC valve repeats ON/OFF operation according to the signal sent from the ECM. The camshaft position sensor detects the actual engine speed and sends a signal to the ECM. The ECM then controls the ON/OFF time of the IACV-AAC valve so that engine speed coincides with the target value memorized in ECM. The target engine speed is the lowest speed at which the engine can operate steadily. The optimum value stored in the ECM is determined by taking into consideration various engine conditions, such as during warm up, deceleration, and engine load (air conditioner, power steering and cooling fan operation).

COMPONENT DESCRIPTION IACV-AAC valve The IACV-AAC valve is moved by ON/OFF pulses from the ECM. The longer the ON pulse, the greater the amount of air that will flow through the valve. The more air that flows through the valve, the higher the idle speed.

Air

SEF040E

EC-335

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS ~ Idle Air Control Valve (IACV) - Auxiliary Air Control (AAC) Valve (Cont'd)

EC-AAC/V-01

Refer to EL-POWER.

BR

I

$-~ BR

BR

1r.fJ1@) 1$1 (E203)

rn> (E201)

@:

AlT models MIT models ... : Detectable line for DTC ---: Non-detectable line for DTC

:

*_1 BR

SR

I

~I BR

IACV-AAC VALVE

(E213)

~ SB

I SB

14J1

(E227) (F12)

SB

I SB

~ ISC

~
~

~~

GIIDID

S

@

(E213) SR

ECM (ECCS CONTROL MODULE) C£I)

~@ ~GY

C£I) L

HEC015

EC-336

• --

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS [ill Idle Air Control Valve (IACV) - Auxiliary Air Control (AAC) Valve (Cont'd)

IGN TIMING

CONDITION

IGN/T

0

ADJ.

SETIING

FEEDBACK

===

MONITOR CAS. RPM (REF) IGN TIMING IDLE POSITION

DIAGNOSTIC

PROCEDURE

-INSPECTION

HOLD

START

-----

Drops

800rpm 15BTDC ON SEF786KA

INSPECTION

CHECK OVERALL FUNCTION. 1. Start engine and warm it up sufficiently. 2. Check idle speed. 800::1:50 rpm If NG, adjust idle speed. (Refer to eEC-243.) 3. .. • Perform "IGN TIMING ADJ" I!I in "WORK SUPPORT" mode with CONSULT. • Disconnect IACV-AAC valve harness connector. 4. Ma ~ e sure that idle speed drops.

END

•

(l) 5

Does

not drop

CHECK POWER SUPPLY. 1. Stop engine. 2. Disconnect IACV-AAC valve harness connector. 3. Turn ignition switch "ON". 4. Check voltage between terminal G) and ground with CONSULT or tester. Voltage: Battery voltage

NG

OK

Check the following . • Harness connectors @D, ([ill) (M/T models) • Harness connectors @, @ (A/T models) • 7.5A fuse • Harness for open or short between IACVAAC valve harness connector and fuse If NG, repair harness or con nectors.

[!1

MEC768B

~i5 ECM

E[CONNECTORII 113

CHECK OUTPUT SIGNAL CIRCUIT. 1. Disconnect ECM harness connector. 2. Check harness continuity between ECM terminal and terminal (2). Continuity should exist. If OK, check harness for short

• Harness for open or short between ECM and IACV-AAC valve If NG, repair harness or connectors.

OK NG

CHECK COMPONENT (IACV-AAC valve). Refer to "COMPONENT on next page.

INSPECTION"

OK Disconnect and reconnect harness nectors in the circuit Then retest Trouble

con-

is not fixed.

Check ECM pin terminals for damage and check the connection of ECM harness connector. Reconnect ECM harness connector and retest

INSPECTION

EC-337

END


@,@D

CTID

~i5 cffb

NG

Replace

IACV-AAC

valve.

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS Idle Air Control Valve (IACV) - Auxiliary Control (AAC) Valve (Cont'd) COMPONENT INSPECTION IACV-AAC valve Disconnect IACV-AAC valve harness connector. • Check IACV-AAC valve resistance. Resistance: Approximately 100 [at 25°C (77°F)] • Check plunger for seizing or sticking. • Check for broken spring. MEC770B

EC-338

[ill Air


[]K]

ITEMS

Idle Air Control Valve (IACV)-FICD Solenoid Valve

EC-FICD-01 FUSE BLOCK

Refer to EL-POWER.

(JIB)

@ (El06)

I

L/Y

•

~ ! ~

LIB

L!Y

rn~

AIR ~12g~~~TIONER -I ........ ~ -I --~I-~~I«@

I THERMO CONTROL AMPLIFIER

THERMISTOR

Y

L/R

I.

lMW

~

I

I Y

L/R

JA---.. Next .",........page

m 1$l(E202) L/R

I

To compressor

.-

I

GY

....~r-.

LOW

L/R

A/C switch + To(Refer to HA-A/C. )

IACV-

lbi=Jl ~

~t

HIGH

OUALPRESSURE SWITCH

NORMAL

+ (Refer to HA-A/C.)

L/R

FICO SOLENOID VALVE CE212)

B

1$1(E227) ([g)

@

~

•-

~ G

1

_. -:

L

JS2L~

G

~Next

page

B/Y

Detectable line for oTC Non-detectable line for oTC

A«@ T w.g)

_

I

B/Y

+ contro 1

r-J B

t.J ill)

TO ECM (ECCS

module)

B

1
~

rIDm:IID

(E202) B

~ (E212) UJ.g) GY

~ ~

([g) GY

~ 2 ~3

W

CHID , {EtOn @

, (El06)

B

EC-339

HEC021

[]K]

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS Idle Air Control Valve (IACV)-FICD Solenoid Valve (Co nt' d)

EC-FICD-02 Preceding page

<@-6

-:

<&Y


-:

Y

6

r=bCE101)

~

'-T"' eM[)

'T'

116Al~- - - - - - - - - - ~f38l1 Y

Y

6

@

6

II~~-~~-------~rihl

T

~@

t

Y

6

din

rF41i1

ACRLY

AIR CON


em

Refer to last page (Foldout page) . (MS)

,
em L HEC022

EC-340

Idle adjusting screw

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS []liJ Idle Air Control Valve (IACV)-FICD Solenoid Valve (Cont'd) COMPONENT

DESCRIPTION

When the air conditioner is on, the IACV-FICD solenoid supplies additional air to adjust to the increased load.

valve

MEF023D

DIAGNOSTIC

•

PROCEDURE

INSPECTION START

MEF634E

CHECK OVERALL FUNCTION. 1. Start engine and warm it up sufficiently. 2. Check idle speed. 800:1::50 rpm

OK

INSPECTION END

If NG, adjust idle speed. 3. Turn air conditioner switch and blower fan switch "ON". 4. Recheck idle speed. 850 rpm or more

NG Check if air conditioner compressor functions normally.

NG

Refer to "TROUBLE DIAGNOSES" i!1 HA section.

NG


OK

CHECK POWER SUPPLY. 1. Stop engine. 2. Disconnect IACV-FICD solenoid valve harness connector. 3. Start engine, then turn air conditioner switch and blower fan "ON".

AEC765

4. Check voltage between terminal CD and ground with CONSULT or tester. Voltage: Battery voltage OK

EC-341

@D,@!) • Harness for open or short between IACVFICO solenoid valve harness connector and air conditioner relay If NG, repair harness or connectors.

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS Idle Air Control Valve (IACV)-FICD Solenoid Valve (Cont'd)

~i5

@

cf0 CHECK GROUND CIRCUIT. 1. Turn ignition switch "OFF". 2. Check harness continuity between terminal @ and body ground. Continuity should exist. If OK, check harness for short.

NG

cmD,@ • Harness for open or short between IACVFICO solenoid valve and engine ground If NG, repair harness or connectors.

AEC766

OK

CHECK COMPONENT (IACV-FICD solenoid valve). Refer to "COMPONENT INSPECTION" below.


NG

Replace IACV-FICD solenoid valve.

OK

Disconnect and reconnect harness connectors in the circuit. Then retest. Trouble is not fixed. Check ECM pin terminals for damage and check the connection of ECM harness connector. Reconnect ECM harness connector. Then retest.

INSPECTION END

COMPONENT

~i5@d

INSPECTION

IACV-FICD solenoid valve Disconnect IACV-F1CD solenoid valve harness connector. • Check for clicking sound when applying 12V direct current to terminals.

~

SEF721Q

• •

\ Washer

Check plunger for seizing or sticking. Check for broken spring.

~~v err ~S~log

Plunger SEF097K:

EC-342


ITEMS

Cooling Fan Control SYSTEM DESCRIPTION Cooling fan control

I

I Vehicle speed


EGM (EGGS control module)

Engine coolant temperature Engine coolant temperature sensor

I Air conditioner

I Air

I

~ Goaling fan relay(s)

conditio~er "ON" signal

switch

The ECM controls the cooling fan corresponding to the vehicle speed, engine coolant temperature, air conditioner ON signal. The control system has 3-step control [HIGH/LOW/OFF] on A/T models 2-step control [ON/OFF] on M/T models.

and and

Operation For AIT models ~u:

~LL .3 ?- 105 (221)

~o 2i 0

2i

0

100 (212)

E

2

95 (203)

95 (203)

C

o'"o

o'"o

o

o


OJ

c:

.0,

c

w

0: Cooling

switch is "ON".

~ ?- 105 (221) ~0

100 (212)

E

2 C

Air conditioner

fans do not operate.

~:


OJ

.~ ~

Cooling fans operate at "Low" speed.

m!lll:

Cooling fans operate at "High" speed. MEC772B

For MIT models ~u: 1il ;::J

0

OJ

0

~

Air conditioner 105 (221)

C

OJ

c

.0,

c ill

1il

Z;

OJ

0

Air conditioner

switch is "ON".

0

105 (221) 100 (212)

OJ

-

95 (203)

oo '" o

::J

E

100 (212)

<1>

-

~ u:

switch is "OFF".

C

o'"o

I

o


0: COOling fans

95 (203)

OJ

c 0,

c

ill

m:

do not operate.

EC-343

20

80

(12) (50) Vehicle speed km/h (MPH)

Cooling fans operate at "High" speed.

MEC773B

•


M/T models

~

EC-COOL/F-01 BATTERY (Via fusible link) Refer to EL-POWER.

FUSE BLOCK

30A

o

(JIB) (El06)

IIQ~OI BR

I

GY

1--

II!]1 BR

I

GY

n

@: Models with air conditioner ... : Detectable line for DIC -: Non-detectable line for Ole

COOLING FAN

u 1 RELAY-1

1biJ1bi=Jl@ LG/R G/B

I

1----0-1

LG/R

r=::!=
I

m

m

G/B

LG/R

~

I

G/B

COOLING FAN

LG/R

+@ R Lr

~

-

------

COOLING FAN MOTOR-2

rn @

~

B

B

l-------6

I

LG/R

m

M

(E45)

II-t-JI(M49)

RFRL

~

M MOTOR-l


I

e.1

B

..L_

..L_

ern>

@D

B

em


+ 2

1

L

@ , (El0t)

~@~ lJ.l.g)

GY , GY

(El06)

5

em L

HEC016

EC-344


AIT models

[][]

EC-COOL/F-02

IGNITION SWITCH ON or STAAT

i0A

~.jffil

FUSE

~~9~f

I 25 I

(El06)

30A

30A

IT]

IT]

GY

@:

Models with air conditioner ... : Detectable line for DTC -: Non-detectable line for DTC

Refer to EL-POWEA.

G/W

•

•--1

-~-,-I-FO~=-_I I SR

COOLINGII:!:I ~~~AY-i

(ffi)

GY

:!i'

~

~

~

~

LG/R

G/8

G/A

LG ~LG/R r:::::k,{jQj;r:::::k,

SR

'I :}:'

:]JII COOLING

~

I~ 114.J I~-

G/W

rn

LG/S

~

~

~ lbiJ U+!J

-tr=- !-.JI LG

G/Y

8

_I

- - -l13.J II

SA

~~~AY-3

~

~iC8)

lbiJ ~

~

@

LG

RFRL

S

I--~t

_

~~~LING

MOTOR-1 ~

~)

t

COOLING FAN

MOTOR-2

rn

t t

@

LG/R

AFAH

G/OR

wT1

I I 1t!J~CEID -F6- ~cPl I~ 1 ~ rrToi1 rm LG/R

~

G/R

LG (M49) LG/R

LG

G/W LG/R

':f]1 I:[]II COOLING/I:!:I 1:f]1 ':[]II

~~~AY-2

LG ~LG/R

LG

GY

____r~-,

ECM (ECCS CONTROL

MODULE) (IT)

S

S

-!-

-!-

~

Refer to last page (Foldout page) . ~ ~

(Ei2), SR

(Ei7), SR

(Ei8) SR

~

t::mJ

(E40), GY

(E46) GY

~

, (El0!)

(El06)

em L

HEC017

EC-345

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS Cooling Fan Control (Cont'd) • COOLING FAN CIRCUIT.

M/T models

DOES INSPECTION START COOLING FAN ROTATE AND STOP EVERY3 SECONDS

NEXT

II

II

NO

===

I

YES

MEF311F

0


7

OK

INSPECTION END

(ij\

rij\

\J!V

OFF

MONITOR

CHECK OVERALL FUNCTION. 1. Turn ignition switch "ON". ~ 2. Perform "COOLING FAN CIRCUIT" in "FUNCTION TEST" mode with CONSULT. OR 1. Turn ignition switch "ON". 2. Select "COOLING FAN" in "ACTIVE TEST" mode with CONSULT. OR

===

COOLAN TEMP/S

I With air

HI

k

With air conditioner

C 00lin9fan

I

conditioner 1. Start engine. 2. Set temperature lever at full cold position. 3. Turn air conditioner switch "ON". 4. Turn blower fan switch "ON". 5. Run engine at idle for a few minutes with air conditioner operating. 6. Make sure that cooling fan operates. Without air conditioner 1. Start engine. 2. Keep engine speed at about 2,000 rpm until engine is warmed up sufficiently. 3. Make sure that cooling fan begins to operate during warm-up.

I

Q ~ID~

I

NG

MEF277G

CHECK POWER SUPPLY. 1. Turn air conditioner switch "OFF". 2. Turn blower fan switch "OFF" (Step 1 and 2 are only performed for models with air conditi.oner.) 3. Stop engine. 4. Disconnect cooling fan relay. 5. Turn ignition switch "ON". 6. Check voltage between terminals G), @ and ground. Voltage: Battery voltage OK

@

EC-346

NG

Check the following. • 30A fusible link • 10A fuse • Harness for open or short between fuse and cooling fan relay • Harness for open or short between battery and cooling fan relay If NG, repair harness or connectors.

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS Cooling Fan Control (Cont'd) @

SEF777P

CHECK GROUND CIRCUIT. 1. Turn ignition switch "OFF". 2. Disconnect cooling fan motor-1 harness connector and cooling fan motor-2 harness connector. 3. Check harness continuity between terminal G) and terminal @, terminal @ and body ground. Continuity should exist.

NG


(!] CHECK OUTPUT SIGNAL CIRCUIT. 1. Disconnect ECM harness connector. 2. Check harness continuity between ECM terminal @ and terminal @. Continuity should exist. If OK, check harness for short.

NG

(]D,@ • Harness connectors

@,@D • Harness for open or short between ECM and cooling fan relay If NG, repair harness or connectors.

OK MEC775B

~io

1=1

=EC=M=W CONNECTOR

~i5 II

~

CHECK COMPONENT (Cooling fan relay). Refer to "COMPONENT INSPECTION", EC-353.


NG


OK

SEF332Q

CHECK COMPONENTS (Cooling fan motors). Refer to "COMPONENT INSPECTION", EC-353.



INSPECTION END

EC-347

NG


•

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS Cooling Fan Control (Cont'd) AlT models

INSPECTION START

CHECK COOLING FAN LOW SPEED OPERATION. 1. Disconnect cooling fan re/ays-2 and -3. 2. Turn ignition switch "ON". 3. Perform "COOLING FAN CIRCUIT" in "FUNCTION

00

• COOLING FAN CIRCUIT. DOES

TEST" mode with CONSULT. OR

COOLING FAN

2. Turn ignition switch "ON". 3. Perform "COOLING FAN" in "ACTIVE TEST" mode with CONSULT.

ROTATE AND STOP EVERY 3 SECONDS

I

OR

NEXT

II

II

NO

YES

0


===

OFF ===

MONITOR

COOLAN TEMPjS

88°C

==H=I=11 L~W

I

With air conditioner lCOOtingfan

@l

JF311F

(j) I With

air conditioner 2. Start engine.

I

3. Set temperature lever at full cold position. 4. Turn air conditioner switch "ON". 5. Turn blower fan switch "ON". 6. Run engine at idle for a few minutes with air conditioner operating. 7. Make sure that cooling fan operates at low speed. Without air conditioner 1 2. Start engine. 3. Keep engine speed at about 2,000 rpm until engine is warmed up sufficiently. 4. Make sure that cooling fan begins to I

operate at low speed during warmup. OK

~ID~

EC-348

NG

Check cooling fan low speed control circuit. (Go to

I

PROCEDURE A EC-350.)

I,

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS Cooling Fan Control (Cont'd) • COOLING FAN CIRCUIT. DOES

Ii

COOLING FAN ROTATE AND STOP EVERY 3 SECONDS

II

NEXT

Ii

•

II

NO

ACTIVE TEST.

COOLING FAN

===

"I

I

YES

MEF311F

D

CHECK COOLING FAN HIGH SPEED OPERATION. 1. Turn ignition switch "OFF". 2. Reconnect cooling fan relays-2 and -3. 3. Disconnect cooling fan relay-1. 4. Turn ignition switch "ON". ~ 5. Perform "COOLING FAN

(ij\

CIRCUIT" in "FUNCTION TEST" mode with CONSULT.

OFF

MONITOR

fiii\

---

~ COOLAN TEMP/S

clTJI Ii

LOW

1.1-

MEF314F

Cooling fan

OR

4. Turn ignition switch "ON". 5. Perform "COOLING FAN" in "ACTIVE TEST" mode with CONSULT. OR 4. Turn air conditioner switch and blower fan switch "OFF" (Models with air conditioner). 5. Disconnect engine coolant temperature sensor harness connector. 6. Connect 150Q resistor to engine coolant temperature sensor harness connector.

150(1 resistor

7. Restart engine and make sure that cooling fan operates at higher speed than low speed. OK

MEC475B

INSPECTION END

EC-349

NG

Check cooling fan high speed control circuit. (Go to

I

PROCEDURE B EC-351.)

I.

•

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS Cooling Fan Control (Cont'd) PROCEDURE A INSPECTION START

IJ;

3

~

7 5

2

I CHECK POWER SUPPLY. 1. Turn ignition switch "OFF".

1

Cooling fan relay-1

SEF725QB

NG

2. Disconnect cooling fan relay-1. 3. Turn ignition switch "ON". 4. Check voltage between terminals CD, @, @ and ground with CONSULT or tester. Voltage: Battery voltage OK

Check the following. • 10A fuse • 30A fusible link • Harness for open or short between cooling fan relay-1 and fuse • Harness for open or short between cooling fan relay-1 and battery If NG, repair harness or connectors.


CHECK GROUND CIRCUIT. 1. Turn ignition switch "OFF". 2. Disconnect cooling fan motor-1 harness connector and cooling fan rnotor-2 harness connector. 3. Check harness continuity between cooling fan relay-1 terminal @ and cooling fan motor-1 terminal CD, cooling fan relay-1 terminal (J) and cooling fan motor-2 terminal CD. Continuity should exist. If OK, check harness for short. 4. Check harness continuity between terminal @ and body ground. Continuity should exist. If OK, check harness for short.

/ 0

~io~io~io.-fT1 3

.~

7 5

~21.

. C00 ,Ing f an re Iay- 1

~ ~ Cooling Cooling fan motor-1 fan motor-2

~ SEF723QA

CHECK OUTPUT SIGNAL CIRCUIT. 1. Disconnect ECM harness connector. 2. Check harness continuity between ECM terminal @ and terminal @. Continuity should exist. If OK, check harness for short.

CHECK COMPONENT (Cooling fan relay-1). Refer to "COMPONENT INSPECTION", EC-353.

@

S S

\lliJ

Cooling fan ~motor-2

SEF727QA

EC-350


@D,@ • Harness connectors

@,QD • Harness for open or short between cooling fan relay-1 and ECM If NG, repair harness or connectors.

OK

OK

Cooling.fan motor-1

NG

NG



o

~15 II

ECM

~CONNECTORII 9

~

INNEer

@

~

Cooling

CHECK COMPONENT (Cooling fan motors-1 and -2). Refer to "COMPONENT INSPECTION", EC-353.

fan relay-1

illi

3

7 5

2

1


OK


•

Trouble is not fixed. Check ECM pin terminals for damage and check the connection of ECM harne&s connector. Reconnect ECM harness connector and retest.

[

INSPECTION END

PROCEDURE B INSPECTION START

CHECK POWER SUPPLY. 1. Turn ignition switch "OFF" 2. Disconnect cooling fan relays-2 and -3.

3. Turn ignition switch "ON". 4. Check voltage between cooling fan relay-2 terminals CD, @ and ground, and between cooling fan relay-3 terminals CD, @ and ground with CONSULT or tester. Voltage: Battery voltage

~i5 ~-

clf:tb

Coolingfan relay-2

OK

~-

@

ffi:b Coolingfan relay-3

SEF781P

EC-351

NG

Check the following. • 10A fuse • 30A fusible link • Harness for open or short between cooling fan relays-2, -3 and fuse • Harness for open or short between cooling fan relays-2, -3 and battery If NG, repair harness or connectors.

TROUBLE DIAGNOSIS FOR NON';DETECTABLE ITEMS Cooling Fan Control (Cont'd) @

1

~ iiO

Cooling fan relay-2

6 3 7 5

2

1

1f,

2

CHECK GROUND CIRCUIT. 1. Turn ignition switch "OFF". 2. Disconnect cooling fan motor-1 harness connector and cooling fan motor-2 harness connector. 3. Check harness continuity between terminal @ and terminal @, terminal @ and terminal @, terminal CV and body ground. Continuity should exist. If OK, check harness for short. 4. Check harness continuity between terminal @ and terminal @, terminal @ and terminal @, terminal CV and body ground. Continuity should exist. If OK, check harness for short.

NG


NG


Ia

3 4

Cooling fan motor-1 harness connector

II

111 SEF782PA

II

~ iifO

6 3 7 5

2

CHECK OUTPUT SIGNAL CIRCUIT. 1. Disconnect ECM harness connector. 2. Check harness continuity between ECM terminal @J and terminal @. Continuity should exist. If OK, check harness for short.

Cooling fan relay-3

CID.@ • Harness connectors

@,@ • Harness for open or short between cooling fan relays-2. 3 and ECM If NG. repair harness or connectors.

OK

1

tllii

It


CHECK COMPONENT (Cooling fan relays-2, 3). Refer to "COMPONENT INSPECTION" on next page.

NG

Replace cooling fan relays.

OK

CHECK COMPONENTS (Cooling fan motors). Refer to "COMPONENT INSPECTION" on next page. OK

SEF783PA

II

~15 I ~Io f,:j!

ECM

ElCONNECTORI 10

Cooling fan relay-2, -3

Disconnect and reconnect harness connectars in the circuit. Then retest. Trouble is not fixed. Check ECM pin terminals for damage and check the connection of ECM harness connector. Reconnect ECM harness connector and retest.

~

[?Ffu INSPECTION END

MEC7788

EC-352


TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS Cooling Fan Control (Cont'd) COMPONENT

MIT models

INSPECTION

Cooling fan relay (M/T models)

=

Check continuity

between

terminals

@ and

Continuity

Conditions 12V direct

current

supply

terminals

CD

@

No current

and

CID.

between

Yes

No

supply

SEF511PA

If NG, replace

•

relay.

Cooling fan relays-1, -2 and -3 (A/T models) Check continuity between terminals @ and CID, @ and (j).

AlT models

Continuity

Conditions 12V direct

current

terminals

CD

No current

supply

between

Yes

and @

No

supply

If NG, replace

relay.

SEC202BA

Cooling fan motors-1 and -2

For AIT Models

1. 2. Cooling fan motor harness connector

Disconnect cooling fan motor harness connectors. Supply cooling fan motor terminals with battery voltage check operation. Terminals Speed

Low (A/T AEC715

Cooling

fan

High (A/T

motor For MIT models

models)

models)

High (M/T models)

Cooling fan motor should operate. If NG, replace cooling fan motor.

AEC,81

EC-353

(Ee)

(8)

CD

@

CD,@

@,@

CD

@

and


ITEMS

~

Power Steering Oil Pressure Switch

EC-PST/SW-01 ECM


em

PWST

-:

Detectable

-:


for DTC

1~31

line

PU/W

IIrnl

PU/W

CfID

=r@

PU/W

I

PU/W

I$J'C~MID

pu/w

I POWER STEERING OIL PRESSURE SWITCH

ON OFF.....--

(g) ~ B

I ,-, B

B

-L

-L

@

<1;51)


~@ U@ GY

CHID ,m

em L

HEC018

EC-354

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS [][] Power Steering Oil Pressure Switch (Cont'd) COMPONENT

DESCRIPTION

The power steering oil pressure switch is attached to the power steering high-pressure tube and detects a power steering load. When a power steering load is detected, it signals the ECM. The ECM adjusts the IACV-AAC valve to increase the idle speed and adjust for the increased load.

Hoodledge RH ~ MEC730B

DIAGNOSTIC

•

PROCEDURE

• PW/ST SIGNAL CIRCUIT.

INSPECTION START HOLD STEERING WHEEL IN A FULL

LOCKED

POSITION

THEN

CHECK OVERALL FUNCTION. 1. Start engine and warm it up sufficiently.

TOUCH START

II

NEXT

START MEF023E

-crMONITOR

0

-crNO FAIL

PW/ST SIGNAL

00 @

OFF

2. Perform "PW/ST SIGNAL CIRCUIT" in "FUNCTION TEST" mode with CONSULT. OR 2. Check "PW/ST SIGNAL" in "DATA MONITOR" mode with CONSULT. Steering is in neutral position: OFF Steering is turned: ON

RECORD SEF5911

m

1='

=EC=M

=.,~

CONNECTORII ~

43

is

00

When steering wheel is turned quickly. Approximately OV Except above Approximately 8 - 10V

[Y] +

@

OR 2. Check voltage between ECM terminal @ and ground. Voltage:

-

~NG

.". MEF315F

EC-355

~

INSPECTION END

I

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS Power Steering Oil Pressure Switch (Co nt' d)

mJ

@

1 CHECK GROUND CIRCUIT. 1. Turn ignition switch "OFF". 2. Disconnect power steering oil pressure switch harness connector.

--..

NG


NG


3. Check harness continuity between terminal @ and engine ground. Continuity should exist.

AEC760

If OK, check harness for short. OK

~i5 II

ECM

~CONNECTORII

~i5 dIb

43

[!J CHECK INPUT SIGNAL CIRCUIT. 1. Disconnect ECM harness connector. 2. Check harness continuity between ECM terminal @ and terminal CD. Continuity should exist. If OK, check harness for short.

--..

CID,@ • Harness connectors

@,@D • Harness for open or short between ECM and power steering oil pressure switch If NG, repair harness or connectors.

OK SEF501Q

NG

CHECK COMPONENT (Power steering oil pressure switch).

Replace power steering oil pressure switch.

Refer to "COMPONENT INSPECTION" below. OK


INSPECTION END

COMPONENT

~ to ID

INSPECTION

Power steering oil pressure switch 1. Disconnect power steering oil pressure switch harness connector then start engine. 2. Check continuity between terminals CD and @. Conditions

~ AEC762

Continuity

Steering wheel is being turned

Yes

Steering wheel is not being turned

No

If NG, replace power steering oil pressure switch.

EC-356

TROUBLE DIAGNOSIS FOR NON-DETECTABLE Park/Neutral

ITEMS

~

Position Switch

EC-PNP/SW-01 ECM (ECCS CONTROL MODULE) ill)

NEUT

(A): A/T models @: MlT models Detectable line -: for DTC -: Non-detectable line for DTC

13•51

G/OR

I

G/OR

I$I@ @ G/OR

1$1 CMID ~

G/OR

I

O---a>---

t

~~Qr

G/OR.j

G/OR --

G/OR

•

IdJl~ =r (£201)

P ..... R

G/OR

.. N-D

INHIBITOR 1 SWITCH 2 (W):(A)

I

G/OR

m

OTHER --

NEUTRAL POSITION SWITCH @ID: @

tIDIDZIID ~

tgJ

(E220)

~

«222)

B

~

GY


fITilll~

~~

GY

~

(][)

B

,(E10t)

(IT) L

HEC019

EC-357

•


[ill

When the gear position is in "P" (A/T models only) or "N", park/neutral position is "ON". ECM detects the position because the continuity of the line (the "ON" signal) exists.

m

DIAGNOSTIC

PROCEDURE

• PARKINEUTPOSI SW CKT •

Neutral position switch (M/T models)

SHIFT

NIP -POSITION

OUT OF

INSPECTION 8T ART

THEN TOUCH START

I NEXT II

I

START

MEC731B

m * MONITOR * NO FAIL 0

CHECK OVERALL FUNCTION. 1 Turn ignition switch "ON".

(Iii'" ~

ON

PIN POSI SW

(F.i\

\J!J

RECORD

2. Perform "PARK/NEUT POSI SW CKT" in "FUNCTION TEST" mode with CONSULT. OR 2. Select "PIN POSI SW" in "DATA MONITOR" mode with CONSULT. 3. Check "PIN POSI SW" signal under the following conditions. Neutral position: ON Except neulral posllion: OFF OR

SEF963N

m ~

CONNECT

~

~ ~

~

lAID£)~~ II

ECM

EcoNNECTORl1 35

2. Check vo~ge between ECM terminal ~ and ground under the following conditions. Voltage: Neutral position Approximately OV Excepl neutral position Ballery voltage NG

MEC779B

EC-3S8

OK

INSPECTION END

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS Park/Neutral Position Switch (Cont'd) @

1

CHECK GROUND CIRCUIT. 1. Turn ignition switch "OFF". 2. Disconnect neutral position switch harness connector. 3. Check harness continuity between terminal @ and body ground. AEC750

NG

--..

(ill1), (ill) • Harness for open or short between neutral position switch and body ground If NG, repair harness or


connectors.

OK

II

~Io ECM

Ef

CONNECTOR

II

~Io illDJ

35


[!] . CHECK INPUT SIGNAL CIRCUIT. 1. Disconnect ECM harness connector. 2. Check harness continuity between ECM terminal @ and terminal CD. Continuity should exist. If OK, check harness for short.

NG

f-----



@,@D • Harness connectors

@),@

OK

SEF503Q


• Harness for open or short between ECM and neutral position switch If NG, repair harness or connectors. NG

CHECK COMPONENT (Neutral position switch). Refer to MT section. OK Disconnect and reconnect harness connectors in the circuit. Then retest. Trouble is not fixed. Check ECM pin terminals for damage and check the connection of ECM harness connector. Reconnect ECM harness connector and retest.

INSPECTION END

EC-359

~

Replace neutral position switch.

•


m

•

I Inhibitor switch

PARKINEUTPOSI SW CKT • SHIFT

(AIr

models)

J

INSPECTION START

OUT OF NIP-POSITION THEN TOUCH START

CHECK OVERALL FUNCTION.

fiii\ I

NEXT

II

I

START

~

SW CKT" in "FUNCTION TEST" mode with CONSULT.

MEC7318

m * MONITOR * NO FAIL PIN POSI SW

0

ON

1. Turn ignition switch "ON". 2. Perform "PARK/NEUT POSI

rif1 ~

OR

1. Turn ignition switch "ON". 2. Select "PIN POSI SW" in "DATA MONITOR" mode with CONSULT. 3. Check "PIN POSI SW" signal under the following conditions. "N" or "P" position: ON Except above position: OFF

RECORD

OR SEF963N

m~i)~0 II

ECM

~CONNECTORII

1. Make sure that inhibitor switch circuit functions properly. (Refer to AT section.) 2. Turn ignition switch "ON". 3. Check voltage between ECM terminal @ and ground under the following conditions. Voltage: UN" or uP" position

30

Approximately OV Except above position Battery voltage MEC7798

NG

EC-360

OK

INSPECTION END

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS Park/Neutral Position Switch (Cont'd) @

1

CHECK GROUND CIRCUIT. 1. Disconnect inhibitor switch harness connector. 2. Check harness continuity between terminals CD and body ground. Continuity should exist. If OK, check harness for short.

NG

f----+

@ill,@ • Harness for open or short between inhibitor switch and body ground If NG, repair harness or connectors.

OK

MEF791EA


[i

~i5

CHECK INPUT SIGNAL CIRCUIT. 1. Disconnect ECM harness connector. 2. Gheck harness continuity between ECM terminal @ and terminal @. Continuity should exist. If OK, check harness for short.

@B

NG

----.


@,@[!) • Harness connectors

@,@

OK

• Harness for open or short between ECM and inhibitor switch If NG, repair harness or connectors.

MEC780B

ECM

~CONNECTORI 35

NG

CHECK COMPONENT (Inhibitor switch). Refer to AT section.

~. \:lliJ

OK Disconnect and reconnect harness connectors in the circuit. Then retest. Trouble is not fixed. MEC781B


INSPECTION END

EC-361


Replace inhibitor switch.

•


ITEMS

[]K]

Heated Oxygen Sensor (H02S)

EC-H02S-01 IGNITION SWITCH ON or START 10A

[l[J

FUSE

Refer to EL-POWER.

BLOCK (JIB)

~

IN:OI BR!Y

-:

I

-:

BR/Y


,cID,@

=r@

BR/Y

I

BR/Y

m

I4=!J -

OR

HEATED OXYGEN SENSOR

~

W

F 4

tl

I I I

I I

I

I

JOINT CONNECTOR-6

em

W .~.....--~

OR

urtru

u=f9l1

02H

025

ECM

(~g~~ROL MODULE)

cw.

!Il' I'I~ 3456

@ W

~ U@..@)

GY

In

8

B

,_I

-I

-L

m~

~em

CDODJDJDJDJD

1 8

Refe~ to last page (Foldout page) .

GY

CED L

HEC020

EC-362

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS Heated Oxygen Sensor (H02S) (Cont'd) SYSTEM DESCRIPTION Heated oxygen sensor heater control ECM (ECCS ~ control module)

I Engine speed

I Crankshaft position sensor

The ECM performs ON/OFF control of the heated oxygen sensor heater corresponding to the engine speed.

Heated

~ oxygen sensor heater

OPERATION

--~-

COMPONENT

•

Engine speed rpm


Above 3,200

OFF

Below 3,200

ON

DESCRIPTION

The heated oxygen sensor is placed into the front tube. It detects the amount of oxygen in the exhaust gas compared to the outside air. The heated oxygen sensor has a closed-end tube made of ceramic zirconia. The zirconia generates voltage from approximately 1V in richer conditions to in leaner conditions. The heated oxygen sensor signal is sent to the ECM. The ECM adjusts the injection pulse duration to achieve the ideal air-fuel ratio. The ideal air-fuel ratio occurs near the radical change from 1V to

av

i

Heater pad Zirconia tube

Isolation bearing

i

av.

SEF406H

2 ::>

1

~

(5

>

"5 c. "5

0

0

Rich ---

:'-Ideal ratio

_

Lean

Mixture ratio SEF288D

EC-363

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS Heated Oxygen Sensor (H02S) (Cont'd) DIAGNOSTIC •

INSPECTION START

ACCELERATE TO 2000 RPM AND HOLD THEN TOUCH START.

II=] 1800

2000

II

NEXT

ij J

2200

START

MONITOR

*

NO FAIL

CMPSoRPM(REF) M/RFIC MNT

CHECK HEATED OXYGEN SENSOR CIRCUIT. 1. Start engine and warm it up sufficiently. 2. Perform "MIXTURE RATIO TEST" in "FUNCTION TEST" mode with CONSULT.

OK

INSPECTION END

rF.i\

SEF815L

*.

PROCEDURE

MIXTURE RATIO TEST.

0

\J!J

OR

rF.i\

\J!J

2. Make sure that "M/R FIC MNT" in "DATA MONITOR" mode indicates "RICH" and "LEAN" periodically more than 5 times during 10 seconds at 2,000 rpm.

~ ~

2. Stop engine and set ECM Diagnostic Test Mode II (Heated oxygen sensor monitor). 3. Restart engine and run it at about 2,000 rpm for about 2 minutes under no-load. 4. Keep engine speed at 2,000 rpm and make sure that the malfunction indicator lamp on the instrument panel goes on and off more than 5 times during 10 seconds.

2000rpm RICH

OR

I

RECORD

MEC782B

\ -

'~/'

I / CHECK-

/

......

/

NG

I \


'-------------------'

~ Heated oxygen ' ~~ sensor harness connector ij ~I 1-''--\

CHECK INPUT SIGNAL CIRCUIT. 1. Turn ignition switch "OFF". 2. Disconnect heated oxygen sensor harness connector and ECM harness connector. 3. Check harness continuity between ECM terminal @ and terminal @. Continuity should exist. 4. Check harness continuity between ECM terminal @ (or terminal @) and ground. Continuity should not exist. if OK, check harness for short.

\

OK SEF089PA

~i5 II

ECM

-er

CONNECTOR

@

~i5 II

~

19

MEC735B

EC-364

NG


TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS Heated Oxygen Sensor (H02S) (Cont'd) @J

~i)~ID II

J9"

ECM

CONNECTOR

@

II

111

MEC783B

SEF646P

~i5 ECM

J9" CONNECTOR II

CHECK HEATED OXYGEN SENSOR HEATER CIRCUIT. 1. Reconnect harness connectors. 2. Start engine. 3. Check voltage between ECM terminal Gill and ground with CONSULT or tester under the following conditions. Voltage: Engine speed is below 3,200 rpm Approximately OV Engine speed is above 3,200 rpm Battery voltage

CHECK POWER SUPPLY. 1. Stop engine. 2. Disconnect heated oxygen sensor harness connector. 3. Turn ignition switch "ON". 4. Check voltage between terminal @ and ground. Voltage: Battery voltage

~i5

OK

Go to "CHECK COMPONENT".

• NG


aD,@ • 10A fuse • Harness for open or short between heated oxygen sensor and fuse If NG, repair harness or connectors.

OK

cillID

111

CHECK OUTPUT SIGNAL CIRCUIT. 1. Turn ignition switch "OFF". 2. Disconnect ECM harness connector. 3. Check harness continuity between terminal G) and ECM terminal Gill. Continuity should exist. If OK, check harness for short.

NG


MEC784B

OK

Loosen and retighten engine ground screws.

CHECK COMPONENT (Heated oxygen sensor heater). Refer to "COMPONENT INSPECTION" on next page. OK

Disconnect and reconnect harness connectors in the circuit. Then retest. Trouble is not fixed Check ECM pin terminals for damage and check the connection of ECM harness connector. Reconnect ECM harness connector and retest.

INSPECTION END

EC-365

NG


TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS Heated Oxygen Sensor (H02S) (Cont'd) COMPONENT

INSPECTION

Heated oxygen sensor heater Check resistance between terminals CD and Resistance: 3.3 • 6.30 [at 25°C (77°F)] If NG, replace the heated oxygen sensor.

AEC745

EC-366

CID.

[][]


ITEMS

~

Torque Converter Clutch Solenoid Valve

EC-LKUP-01 IGNITION SWITCH ON or START

10A

[]]

FUSE SLOCK

Refer to EL-POWER.

-:

Detectable for DTC

-:


(J/S)

line

•

I Q.61 Y

I

Y

1[~]Im

=r=~ Y

I Y

r=b TORQUE

3

CONVERTER CLUTCH SOLENOID 11111VALVE ~ =r=@ID PIS

I

PIS r=bm

1~1@g) PIS

L

PIS

~

~(][)

PIS

-

PIS

iJJ-

@@

PIS

l PIS

IF1I5n LKUP


em

~~,m ~

Refer to last page (Foldout page) . S

GY

(IT) L

HEC023

EC-367

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS ~ Torque Converter Clutch Solenoid Valve (Cont'd) SYSTEM DESCRIPTION Throttle valve opening angle



ECM (ECCS control


Torque converter clutch solenoid valve

module) Vehicle speed


The AfT lock-up is controlled by the ECM through the torque converter clutch solenoid valve. When the ECM detects any of the following conditions, the ECM switches the torque converter clutch solenoid valve OFF to accomplish lock-up operation. While the vehicle is in conditions other than below, the torque converter clutch solenoid valve is always set to ON, relea'sing the lock-up operation.

• Throttle position is open . • Engine coolant temperature is 70°C (158°F) or more . • Vehicle speed is 58 kmfh (36 MPH) or more.

DIAGNOSTIC

~i3~ II

ECM

PROCEDURE

INSPECTION START

E[CONNECTORII 115

CHECK CONTROL FUNCTION. 1. Jack up drive wheels. 2. Start engine and warm it up sufficiently. 3. Shift selector lever to "0" position. 4. Check voltage between ECM terminal and ground under the following conditions. Voltage: Accelerator pedal Is depressed [Vehicle speed is above 58 km/h (36 MPH).] Battery voltage Accelerator pedal is fully released Approximately OV

OK

GID

II

ECM

Ef

CONNECTOR

II

115

~~

ID

cf8~-H

-

MEC785B

CHECK POWER SUPPLY. 1. Stop engine. 2. Disconnect torque converter clutch solenoid valve harness connector. 3. Turn ignition switch "ON". 4. Check voltage between terminal @ and ground. Voltage: Battery voltage OK

@ MEC279BA

EC-368

CHECK COMPONENT (Torque converter clutch solenoid valve). Refer to "Electrical Components Inspection" in AT section. If NG, replace torque converter clutch solenoid valve. OK

INSPECTION END

NG


@,
TROUBLE DIAGNOSIS FuR NON-DETECTABLE ITEMS [![] Torque Converter Clutch Solenoid Valve (Cont'd) @

~i5 CHECK OUTPUT SIGNAL CIRCUIT. 1. Turn ignition switch "OFF". 2. Disconnect ECM harness connector. 3. Check harness continuity between ECM terminal @ and terminal G). Continuity should exist. If OK, check harness for short.

~

~i5 ECM

Ef

CONNECTOR

II

CHECK COMPONENT (Torque converter clutch solenoid valve). Refer to "Electrical Components Inspection" in AT section.

115

OK

~ SEF514Q

Disconnect and reconnect harness connectors in the circuit. Then retest. Trouble is not fixed Check ECM pin terminals for damage and check the connection of ECM harness connector. Reconnect ECM harness connector and retest.

INSPECTION END

EC-369


@@,@ • Harness connectors

@D,@ • Harness connectors

@,CID • Harness for open or short between ECM and torque converter clutch solenoid valve If NG, repair harness or connectors.

OK

SEF513Q

II

NG

NG

Replace torque converter clutch solenoid valve.

•


[![J

ITEMS

Malfunction Indicator lamp (Mil) Connector (DlC) for CONSULT IGNITION SWITCH ON or START

& Data Link

EC-MIL-01 7.5A

ITJ

Refer to EL-POWER.

FUSE BLOCK

-:


(JIB)

-:

~

Y

G

m

13'01 COMBINATION METER (MALFUNCTION INDICATOR LAMP) @

I

DATA LIN< CONNECTOR

FOR CONSULT (fill)

1

LiJLiJ~LiJ GIS GY IL G/R

U3.211 ORIL

I~GYIL It

tt

l

~ ORIL~

I$~

-F~- - - - - - - - - - -

ORIL CEID

S

~ ~

GIS

JOINT CONNECTOR-5

~ G/W

I~

1bi=H~ G/B GY IL G/R G/W ~$~-~$~-~$~-~$I

I

GIS

GYIL

G/R

I

I

I

ORIL

G/S GY/L G/R

~

mrr15il~rrtru

LED-R

SCI

G/W

I

G/W

SCI CHECK SCI

RX

TX

(In)

(Out)

CL


em


~~ ~OR

em L HEC024

EC-370

INJECTION SYSTEM

By-pass passage (Fuel temperature is cold)

Fuel return passage

Fuel return control valve (Only models for frigid areas)

•

Injection nozzle

Fuel temperature: Cold To fuel tank-

From injection pump

SEF151R

SEF152R

EC-371

VE-TVPE INJECTION PUMP

G)

@ @

Engine slinger Rear back cover Injection pump sprocket

@ @ @

Injection pump bracket Bracket Bracket

(J)

@ @

Water hoses Injection pump Key

Removal 1. Put a matchmark across injection pump and injection pump bracket. 2. Disconnect battery cable, electrical connectors and accelerator wire.

e

3. Set No.1 piston at TDe on its compression stroke. TOC: Crankshaft

pulley notch without painted mark

4. Disconnect water hoses for cold start device. 5. Remove fuel hoses (supply, return and spill) and injection tubes. 6. Remove air duct and injection pump timing belt cover. 7. Remove injection pump timing belt. Refer to EM section ("Injection Pump Timing. Belt").

EC-372

VE-TVPE INJECTION PUMP Removal (Cont'd)

~

8. •

Remove injection pump sprocket with Tool. Remove key from injection pump shaft and store safely .

9.

Remove injection

•

pump assembly.

Installation 1. With matchmarks

2. • 3.

aligned,

install injection

Install key on injection pump shaft, then install injectiol pump sprocket. Use mark "A" on sprocket. Install injection pump timing belt. Refer to EM section ("Injection Pump Timing Belt").

SEF155R

4. 5.

pump.

Adjust injection timing. Refer to "Adjustment" on the next page. Install all parts removed.

EC-373

VE- TYPE INJECTION PUMP Adjustment INJECTION TIMING ADJUSTMENT (Plunger lift adjustment) Preparation

of cold start device

1. Turn cold start device linkage clockwise. 2. Set a suitable block [Thickness: about 15 mm (0.59 in)] between cold start device plunger and linkage rod. 3. Turn crankshaft 2 turns clockwise to set the device to normal position.

Checking 1. 2. 3. 4.

5. 6.

Set NO.1 piston at TDC on its compression stroke. TDC: Without painted mark Remove injection tubes and air bleeder on the back of injection pump. Set dial gauge so its indicator points to somewhere between 1.0 and 2.0 mm (0.039 and 0.079 in) on the scale. Turn crankshaft 1 turn clockwise and check that dial gauge indicates the same value again.

Turn crankshaft counterclockwise about 20 to 25 degrees, then set dial gauge indicator to 0 mm (0 in). Turn crankshaft clockwise and set the pump timing mark to the mark on the crankshaft pulley. Pump timing mark: Yellow painted mark Injection timing: 8 BTDC Read plunger lift. Plunger lift: 0.79 - 0.85 mm (0.0311 - 0.0335 in) at pump timing mark When repeating the checking, start with step 5. 0

7.

•

Adjusting 1. • •

If plunger lift is not within the specified value, adjust by turning injection pump. If indication is smaller than the specified value, turn pump body away from engine. If indication is larger than the specified value, turn pump body towards engine.

2.

SEF779A

Tighten injection pump securing bolts and nuts. Nut: ~: 13 - 18 N.m (1.3 - 1.8 kg-m, 9 - 13 ft-Ib) Bolt: ~: 49 - 59 N.m (5.0 - 6.0 kg-m, 36 - 43 ft-Ib) 3. Remove dial gauge and install air bleeder with new washer. 4. Install injection tubes. Flare nut: ~: 22 - 25 N.m (2.2 - 2.5 kg-m, 16 - 18 ft-Ib) 5. Bleed air from fuel system. Refer to "Water Draining, Fuel Filter Check and Replacement" of "ENGINE MAINTENANCE" in MA section.

EC-374

VE-TVPE INJECTION PUMP Adjustment (Cont'd) IDLE SPEED AND MAXIMUM

~ SPEED ADJUSTMENT

CAUTION: • Do not remove sealing caps unless absolutely necessary. • Never disturb full-load adjusting screw because this alters the mixture ratio and may result in serious engine problems. • Do not adjust maximum speed adjusting screw to a point exceeding specifications, because exceeding the maximum speed may cause engine damage. • When attaching tachometer pickup, remove fuel tUbe clamps. (Refer to tachometer instructions.)

Idle speed adjustment •

Refer to MA section. Idle speed: 700~ ~o rpm

SEF156R

Maximum 1. 2. • 3.

4. 5.

speed adjustment

Start engine and warm it up until coolant temperature indicator points to middle of gauge. Connect tachometer pickup to NO.1 fuel injection tube. Refer to the instructions on tachometer. Depress accelerator pedal fully under no-load and read the tachometer indication. Maximum engine speed (Under no-load): 5,400 rpm If indication is lower than specified maximum engine speed, adjust using maximum speed adjusting screw. After adjustment, tighten lock nut securely and plug it with a sealing cap.

Dash pot adjustment 1. 2.

Warm up engine to normal operating temperature. Attach tachometer and adjust touch speed using adjusting screw. Touch speed: 1,300 rpm

EC-375

•

INJECTION NOZZLE CAUTION: Plug flare nut with a cap or rag so that no dust enters the nozzle. Cover nozzle tip for protection of needle.

Nozzle side

Combustion chamber side

SEF668A

Removal and Installation 1. Remove fuel injection tube and spill tube. 2. Remove injection nozzle assembly. Also remove washers from nozzle end. 3. Install injection nozzle in the reverse order of removal. Injection nozzle to engine: ~: 59 - 69 N'm (6.0 - 7.0 kg-m, 43 - 51 ft-Ib) Injection nozzle to tube: ~: 22 - 25 N'm (2.2 - 2.5 kg-m, 16 - 18 ft-Ib) Spill tube: ~: 39 - 49 N'm (4.0 - 5.0 kg-m, 29 - 36 ft-Ib) a. Always clean the nozzle holes. b. Always use new injection nozzle gasket. c. Note that small washer should be installed in specified direction. d. Bleed air from fuel system.

SEF781A

Disassembly 1.

Loosen nozzle nut while preventing

2.

Arrange all disassembled

nozzle top from turning.

SEF669A

older

:S

Adiusting

c:,

shim

Nozzle spring

~ '~[;{~I:,""' pi,", ~

Nozzle needle ~~(''''Nozzle bOdyr Nozzle nut)

~ SEF670A

EC-376

parts in the order shown at left.

INJECTION NOZZLE Inspection Thoroughly clean all disassembled parts with fresh kerosene or solvent. • If nozzle needle is damaged or fused, replace nozzle assembly with a new one. • If end of nozzle needle is seized or excessively discolored, replace nozzle assembly. • Check nozzle body and distance piece for proper contact. If excessively worn or damaged, replace nozzle assembly or distance piece. • Check distance piece and nozzle holder for proper contact. If excessively worn or damaged, replace distance piece or • nozzle holder. • Check nozzle spring for excessive wear or damage. If excessively worn or damaged, replace it with a new spring.

Cleaning a. b.

Do not touch the nozzle mating surface with your fingers. To wash the nozzles, use a wooden stick and brass brush with clean diesel fuel. 1. Remove any carbon from exterior of nozzle body (except wrapping angle portion) by using Tool.

SEF830

2.

Clean oil sump of nozzle body using Tool.

SEF831

3. Clean nozzle seat by using Tool. This job should be performed with extra precautions, since efficiency of nozzle depends greatly on a good nozzle seat.

KV11290150

SEF832

EC-377

INJECTION NOZZLE Cleaning (Coni' d)

~

4. Clean spray hole of nozzle body by using Tool. To prevent spray hole from canting, always clean it by starting with inner side and working towards outside.

KV11290220

SEF833

5. Decarbonate nozzle needle tip by using Tool.

SEF834

6. Check needle sinking. (1) Pull needle about halfway out from body and then release it. (2) Needle should sink into body very smoothly from just its own weight. (3) Repeat this test and rotate needle slightly each time. If needle fails to sink smoothly from any position, replace both needle and body as a unit.

SEF835

Assembly Assemble in the reverse order of disassembly, observing the following. KV11292010

SEF671A

If nozzle body is not installed properly, Tool cannot be removed and nozzle body may be damaged. Holder to nozzle nut: (OJ: 78 - 98 N'm (8.0 - 10.0 kg-m, 58 - 72 ft-Ib)

EC-378

INJECTION NOZZLE Test and Adjustment WARNING: When using nozzle tester, be careful not to allow diesel fuel sprayed from nozzle to contact your hands or body, and make sure your eyes are properly protected with goggles .

INJECTION 1.

PRESSURE TEST

Install nozzle to injection flare nut.

nozzle tester and bleed air from

EF791A

2.

SEF672A

Pump the tester handle slowly (one time per second) and watch the pressure gauge. 3. Read the pressure gauge when the injection pressure just starts dropping. Initial injection pressure: Used 12,259 - 13,239 kPa (122.6 - 132.4 bar, 125 - 135 kg/cm2, 1,778 • 1,920 psi) New 12,749 - 13,534 kPa (127.5 - 135.3 bar, 130 - 138 kg/cm2, 1,849 • 1,962 psi) Always check initial injection pressure using a new nozzle.

4. a.

To adjust injection pressure, change adjusting shims. Increasing the thickness of adjusting shims increases initial injection pressure. Decreasing thickness reduces initial pressure. b. A shim thickness of 0.04 mm (0.0016 in) corresponds approximately to a difference of 471 kPa (4.71 bar, 4.8 kg/cm2, 68 psi) in initial injection pressure. Refer to SDS for adjusting shim (EC-419).

Adjusting shim

SEF673A

EC-379

•

INJECTION NOZZLE Test and Adjustment (Cont'd)

~

LEAKAGE TEST 1.

2.

Good

Maintain the pressure at about 981 to 1,961 kPa (9.8 to 19.6 bar, 10 to 20 kg/cm2, 142 to 284 psi) below initial injection pressure. Check that there is no dripping from the nozzle tip or around the body.

Faulty SEF674A

3.

If there is leakage, clean, overhaul

or replace nozzle.

SPRAY PATTERN TEST 1. Pump the tester handle one time per second. 2. Check the spray pattern .

• Good

I Wrong

EF794

3.

If the spray pattern is not correct, clean or replace nozzle.

EC-380

FUEL SYSTEM CHECK Priming Pump Check Before checking priming pump, make sure that fuel filter is filled with fuel. 1. Disconnect fuel return hose. Place a suitable container beneath hose end. 2. Pump priming pump and check that the fuel overflows from the hose end. If not, replace priming pump .

Fuel Cut Solenoid Valve 1.

2. 3.

Disconnect fuel cut solenoid check voltage.

valve harness connector

Ignition switch

Voltage

OFF

OV

ON

Battery voltage

and

Check fuel cut solenoid valve for circuit continuity. Remove fuel cut solenoid valve and check that plunger moves smoothly and that spring is normal.

EC-381

•

CRANKCASE VENTILATION SYSTEM

Q Fresh ~

air

Blow-by gas

l

J SEF157R

Ventilation Hose 1. 2.

Check hoses and hose connections for leaks. Disconnect all hoses and clean with compressed air. If any hose cannot be freed of obstructions, replace.

SEC692

EC-382

ENGINE AND EMISSION CONTROL OVERALL SYSTEM Component Parts Location


• relay-2

Glow plugs

SEF159R

EC-383

ENGINE AND EMISSION CONTROL OVERALL SYSTEM System Diagram ~

/

~

__

//

/'

OlCii 0"'0 0

OJ

g

I

I

~

I

(/)

I

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I I I

~

I

OJ

"5,

I

Jj

I c: o

:+=:a.

~ E '-

E ::l c.

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c: -c: OJ (/)
"0 ~

o

0_

::l

g

.- c. OlE

c:

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c: OJ w_

f/)

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OJ C. f/)

OJ

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Ol ::l

0.

,:

Ii

.

I

$

C.

E ~
0

i.~ _

"0

(9.S

SEF160R

EC-384

ENGINE AND EMISSION CONTROL OVERALL SYSTEM Circuit Diagram --:cU

-

~

U IH 3: Ul

lH 3:1UlIT 4 ZIOul H I-L HO Z CDZ HO

I

-

D Q

.Y.

roc .rl

Z ZO 0 HL 1-0 H ZU CDU H4

.M

> .....

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soL -0

I U IH 3: Ul

~

U

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>-ill

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Z 4 LL

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(T)

-.J 00 :LIT ITIWZOIO:L I-U4

ill

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0 I-

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----y-

L

'---11'

0 0

Ql

C

0 -rl ....,

>-

-rl

D C 0

4 U-.J "'-W 4IT

u

=

L

GLI,

I~Ivvv

-rl

ro

L::::::::::J

.c ....,

0

uo

0-

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lIT OW WI-

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---11'

81t5 ==0 ;: '--

LO

r-0'1

~

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0-

:L ::J

WW

0-

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W -.J IT UOO HWUl IWZ WO-W >Ulul

3: 0 -.J CD

~

IZ 4 -.JW OIT O::J UI4 WITIT ZWO HO-Ul CD:LZ ZWW WI-Ul

.-1-0 =>H UO ZW -.JW> W-.J-.J ::J04 LLUl>

0 H 0 ZIT

W

-.J:L OH Ull-

HWUJ CDWZ ZO-W WUlUl

zoo

ww

,-11'

IT

I'

~

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~

s:

ECM(ENGINE

Ul

.....

.c

Ql TI

....,

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r--

OJ

~

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rl

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W IT ::JI lUlU -.JUlI4 WI-< =>IT3: OO-ul

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0'1

(D

0'1

(\j

....

OJ

0'1

r-(\j

....I

T LO

S S

H

CONTROL MODULE)

(\j (D

OJ

0

0'1

(\j

.... 0

OJ 0'1

010

(D (\j

I

....

01 0'1

j

CD I Z H >-.J
~0

~-

= I U IH

3:

~= z

UJ

ZI HU II-

0

Z

u

o

>-1-<

U
H

IH

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CD (\j Z I H >-.J
tUl

W3: 'Y.UJ

LL LL 0

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~

6 6 6

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W

-.J ill H

Ul

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~~

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>-

~

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L..:..'J

IT:

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I'

2:

~~ -f-o = 0- ~I' - f-o ~= (Y] CD I Z H >-.J
8L;':~

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=

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:11

....

CD Z I H IT -.J 0 OZI040 ULL:L

m CD (\j I Z H IT: -.J 0 OZI-

8L;':~

I'

(g) 4

I~~I'

ill

HEeD8?

EC-385

•

ENGINE AND EMISSION CONTROL OVERALL SYSTEM System Chart Ignition key

Quick-glow system

Glow relay & glow lamp

Partial load advance (PLA) control

Solenoid timer

Cooling fan control

Cooling fan relay

Air conditioner cut control

Air conditioner relays


Engine speed sensor


ECM (Engine control module)

Battery voltage


EC-386

TROUBLE DIAGNOSES ECM Terminals and Reference Values PREPARATION 1.

ECM is located behind the center console panel. For this inspection, remove the center console under cover .

2.


3.

Perform all voltage measurements with the connectors connected. Extend tester probe as shown to perform tests easily.

•

MEF603D

!~ Thin wire

Tester probeJ

SEF3671


TERMINAL

LAYOUT

SEF162R

EC-387

TROUBLE DIAGNOSES ~ ECM Terminals and Reference Values (Coni' d) ECM INSPECTION

TABLE -Data are reference values.

TERMINAL NO.

-DATA

CONDITION

ITEM

IEngine is running.1 L 8


Both AIC switch and blower fan switch are "ON".



switch is "OFF".


9


L

L

BATTERY VOLTAGE


IEngine is running

Approximately OV

I

(11-14V)

1V



10


t




L 15

25 37



1V Cooling fan is operating at high speed.


0- 5.0V Output voltage varies with engine coolant temperature.



jlgnition switch "ON"I 28

Approximately OV

Start signal SATTERY VOLTAGE (11 - 14V)

llgnition switch "START"I

Ilgnition key is not inserted.1

OV BATTERY VOLTAGE (11 -

30

Key-in switch Ilgnition key is inserted.1

-

14V) [for 3 seconds at engine coolant temperature of approx. 60°C (140°F) or less)


L 31


Both air conditioner switch and blower fan switch are "ON".


L 38

Power supply

106

Glow relay

Air conditioner switch is "OFF".

Ilgnition switch "OFF"I

Refer to "Quick-glow System".

EC-388

Approximately

OV


TROUBLE DIAGNOSES ~ ECM Terminals and Reference Values (Cont'd) *Data are reference values. TERMINAL NO.

CONDITION

ITEM

*DATA


L 108

Engine coolant temperature (50'F).

is lower than


is higher than

Approximately

we

Solenoid timer

/Engine is running.1

L


we

(50'F).

EC-389

OV

•

TROUBLE DIAGNOSES Quick-glow System SYSTEM DESCRIPTION Key-in switch and key position

Ignition key



Ignition switch Key switch Key timer

START[~

~~ [ -IIn Ir1 ..Lfl

OUT

T,

~

OFF ON [

Lamp

o~~ Relay

OFF

I I-.J TL I

[j

L-

I_ T.

"'I Normal operation

=

UL I I-l TL

r--L

II

I-l

I

.1"l....!:.1LHTo

HT'o

I I

I I

.f"l.-.JL

I

II I

II

Glow plug temperature

TL T, - T, when T, - 0.5 T, TL = T, when T, - 0.5 ~ T,

~

Glow lamp

~

JTl-

Hn

I

To

Operation after key timer is OFF

=.

TL T, when To

>

Leaving key in ON position

Repeating key IN and OUT T'o ~ 80% of To when T. 5': 3 sec.

< T,

Glow plugs

Glow relay

I

11 I !

I

ONe


1iI ~

I HTL

I-l T'L

~

~

1r;,1 ,

I

Repeating key ON and OFF T',

T',

=.

=.

T,

T,

;a; To SEC550B

When the ignition key is inserted into the key cylinder, the engine control module turns on the relay and the "high-level" electric current flows through the glow plugs and heats them up quickly. When the ignition switch is turned on, the control module turns on the indicator. After T1 seconds have passed from key in, the control module turns off the indicator.

While cranking, the relay remains on. The relay automatically turns off after T4 seconds have passed from the engine start.

Engine coolant temperature sensor Second

To

3.1 - 3.9 5.0 - 7.0

T,

1.8 - 3.2

Engine coolant tempera-' ture 'C ('F) -25(-13)

Remarks Resistance (kQ)

19.7

20 (68)

2.5

0.8 - 2.2

60 (140)

0.6

17.0 - 23.0

Lower than 60 (140)

More than 0.6

Higher than 60 (140)

Less than 0.6

255 - 345

Lower than 60 (140)

More than 0.6

Less than 10


Less than 0.6

15 - 25

Lower than 60 (140)

More than 0.6

3 - 7


Less than 0.6

0.1 - 0.9

-

-

T3 40

- 6.0

T4

(T4)

T5

EC-390

When alternator working When alternator working

is

is not

TROUBLE DIAGNOSES Quick-glow System (Cont'd) DESCRIPTION Engine coolant temperature

sensor (ECTS)

The engine coolant temperature sensor detects engine coolant temperature and transmits a signal to the ECM. Electrical resistance of the thermistor decreases in response to the temperature rise.

Key-in switch The key-in switch is built into the key cylinder. The ECM detects the key position and controls the key-in glow system.

SEF938P

EC-391

•

TROUBLE DIAGNOSES Quick-glow System (Co nt' d)

EC-GLOW-01 IGNITION SWITCH START


7.5A

10A

10A

1261

1251

IT]

IN.41 B/Y

1Ni91

1Ni91

1I~11

BR

BR

Y

FUSE BLOCK

Refer to EL-POWER.

(JIB)

@:ID

: <£D:

LHD models RHO models

I

I!i

(GLOW LAMP)

113•31

@

Y

METER COMBINATION

OR

I

B/Y

BR

BR

~ START

~ IGN

~ IGN

GNO-A 11~11 B

GNO-A 11~51 B

GNO-C 12.6I B

GNO-C 113•9 I B

I----.-_-.-I

I

OR

m GIL

ECM (ENGINE CONTROL MODULE)

@

TW ~ G/B

I

__ 1.I

.-o-ee-°l I -------..

I

<;

B

-!-!

A

To engine coolant temperature sensor (Refer to EC-COOL/F.)

;>

1---.1 .

B

-!-


HEC088

EC-392

TROUBLE DIAGNOSES Quick-glow System (Cont'd)

I

EC-GLDW-02

.------.

BATTERY

•

I

Refer

FUSE BLOCK

7.5A

1241

(JIB) (106)

~ffij

10.91

W!L

KEY-IN

~

SWITCH

@

OUT--

~

W/R

+f ~1

BR/Y ~ (EiOf)

I~I

R

I

~~

BR/Y

B/R

~

I

CHID I~I

m W/L

CHID

CHID I~I

I~I

W/L

BR/Y

W/R

W/L ~(E10f)

rA,

CHID

W/R

W!L

W/R

~ (E10!) I~ICHID W/R

t-t tJ tJ I

I

I

W/L

W/R

00

1001

IL@JI

KEY

BATT

G/R

BR/Y

!'e"

(ENGINE CONTROL MODULE) (M39)

~---------------~ :Fnm>~~~~: I

~

[IIg]

(E115) W

LHD models RHO models

1!:i=Jll!:i=!J~

BR/Y

BR/Y (E10f) . ~

(b):

:

11!11~II~e~y ~m>

1 IN

•

B/R

1--~ I

I P

EL-POWER.

IT]

W/L

P

to

75A

:rnJ ,

G

@J

W

l.9J

-----------------

W

I

R

ctJ@ ~~ R

I

R

Q GLOW PLUG

(E213)


: ,

HEC089

EC-393

TROUBLE DIAGNOSES Quick-glow System (Cont'd) -"-.....

'y;-----...

Connectingplate nut:J ~1.0 • 1.5 N.mr"(0.1 • 0.15 kg-m,8.7 - 13.0 in-Ib)

"" ~

.

INSPECTION START ""'-

'-----~

Check fuel level, fuel supplying starter motor, etc.

system,

~

Correct.

~

Install properly.

OK

m Check that all glow plug connecting plate nuts are installed properly. OK CHECK OVERALL FUNCTION. Check entire quick-glow system. (Refer to "System Operation Check" on next

OK

---..

CHECK COMPONENT (Glow plug). See page EC-397.

NG ---..

Repair harness or connector.

NG ---..


page.) NG

SEF939P

(!]

~io

CHECK POWER SUPPLY AND GROUND CIRCUIT. (Refer to "Power Supply and ground circuit for ECM", EC-396). OK

(!] CHECK VOLTAGE BETWEEN GLOW RELA Y AND GROUND. 1) Check voltage between terminals G), @ and ground with tester.

• Harness continuity between glow relay

Voltage: Battery voltage

~

II

ECM

and fuse If NG, repair harness or connectors.

OK

SEF940P

• 7.5A fuse • 75A fusible link

[!1

E1

CONNECTOR

II

CHECK OUTPUT SIGNAL CIRCUIT. 1) Check harness continuity between ECM terminal @ and terminal @.

106

NG

---+


Continuity should exist.

ill]

OK

Ii]

~ SEF941P

Ii]

~i5 Eill~ @]Q]

2

CHECK HARNESS CONTINUITY BETWEEN GLOW RELAY AND GLOW PLUG. 1) Disconnect ECM harness connector. 2) Disconnect glow relay. 3) Check harness continuity between glow relay terminal @ and glow

Glow plug

0

plug. Continuity should exist.

[ill

~OK

~ SEF942P

EC-394

NG

---+


TROUBLE DIAGNOSES Quick-glow System (Cont'd) @

CHECK COMPONENTS

NG

(Glow relay, Glow plug, Engine coolant temperature sensor, Key-in switch, Ignition switch). Refer to "Component Inspection" (EC-


397). OK

•


SYSTEM OPERATION Set voltmeter

ON

key

IN [ OUT

BATIERY [ Voltage

OV

between glow plug and engine body.

1. Key-in glow system • Read voltage when ignition key is inserted switch. Voltage: Battery voltage for about 3 seconds

START [ Ignition

CHECK

,, , I ,

into ignition

JL

SEC5558

2. Quick-glow (Pre-glow) system 1) Turn ignition switch "ON" 3 or more seconds after key-in. 2) Read voltage. Voltage: Battery voltage for about 20* seconds * Coolant temperature is lower than 60°C (140°F). * Repeating ignition key "ON" and "OFF" may change the time.

Ignition

key

BATIERY [ Voltage

OV SEC5568

EC-395


J

F: vo,,:TIERYlJlfr START[

Ignition

ON

key

IN r-

j

L

:

OUT

I I I

oV

SEC557B

r:JL

STA:~[ Ignition key

3. Quick-glow (Cranking) system 1) Disconnect "S" terminal for starter motor to prevent engine from cranking. 2) Read voltage when ignition key is turned to "8T ART". Voltage: Battery voltage * * For about 20 seconds after returning ignition switch to "ON".

IN

:

Engine running

!

OUT [

I I

4. After-glow system 1) Connect "8" terminal to starter motor. 2) Start engine and read voltage. Voltage: Battery voltage for 5* minutes * Coolant temperature is lower than 60°C (140°F).

Jlfi= ,

, I

votta;ATIERY

[

oV

II

SEC558B

POWER SUPPLY AND GROUND CIRCUIT FOR ECM

~i5 ECM

1.

E

CONNECTOR

II

2. 3.

26-39101-105

•

Disconnect "S" terminal for starter motor to prevent engine from cranking. Disconnect ECM harness connector. Check terminals @, @. Gill. @ for ground continuity. Continuity should exist (On). If NG, check ground harness.

SEF943P

~i5 (D

II

ECM

B

CONNECTOR

•5-25-28-30-37-38-106,

4.

II

Check voltage chart. Terminal

at each terminal

No .

Ignition switch position

@

GID

according

to the following

Voltage

OFF (Not inserted)

.

Battery voltage OFF (Not inserted) OFF (Not inserted)

OV

OFF (Inserted)

Battery voltage

OFF

OV

@

@,@ ON

START OFF

Battery voltage OV

@ ON

START

Battery voltage

OFF

ON

OV

@ START

EC-396

Battery voltage


~

If NG. check component parts and their according to the following chart.

•

related

harness

Parts which should be checked Terminal No.

Battery

Fuse IFusible link

@

X

X

Glow relay

Key-in switch

Ignition switch

Harness

X

@

X

X

@

X

X

@,@

X

X

X

@

X

X

X

@

X

X

X

COMPONENT

Glow indicator bulb

X

X X

X X X

X

INSPECTION

Glow relay 1. 2.

Check relay for coil continuity. Continuity should exist. Check relay for proper operation. Coil voltage

Continuity

Contact point

OV

No

OFF

12V

Yes

ON

Ohmmeter SEC5648

Glow plug 1. 2.

•

Remove glow plug connecting plate. Check each glow plug for continuity. Continuity should exist: Approximately 0.650 If NG, replace glow plug.

SEF630K

EC-397

X

•

TROUBLE DIAGNOSES Quick-glow System (Cont'd) 3.

~GIOwnut

Install glow plug connecting

plate securely.

Glow harness Connecting plate

Spring washer

SEC5658


sensor

Check engine coolant temperature Coolant temp. °C ('F) -15

sensor resistance. Resistance kfl 11.5

(5)

0(32)

5.6

10 (50)

3.7

40 (104)

1.2

Key-in switch Check continuity

between terminals

of key-in switch connector.

Ignition key

Continuity

Not inserted

No continuity

Inserted

Continuity should exist.

Alternator Refer to "CHARGING

EC-398

SYSTEM" in EL section.

TROUBLE DIAGNOSES Partial Load Advance (PLA) Control SYSTEM DESCRIPTION Engine coolant temperature sensor

Engine speed sensor


Engine speed


Solenoid timer

This system switches the solenoid timer on and off corresponding to the engine coolant temperature and engine speed. The solenoid timer operation advances and retards the fuel injection timing as follows: • The injection timing advances when the timer is ON, while it retards when the timer is OFF. • When the engine stalls or the ignition switch is in the START position, the solenoid timer is set to OFF. • When the engine coolant temperature is lower than 10°C (50°F), the timer is set to ON.

DESCRIPTION Solenoid timer The solenoid timer switches on and off in accordance with a signal from the ECM. This timer operation changes the pressure in the injection pump, thereby controlling the fuel injection timing.

Engine speed sensor The engine speed sensor detects engine speed by monitoring the rotation of drive shaft gear in the injection pump. The sensor sends a signal of 37 pulses per drive shaft rotation to the ECM.

EC-399

•

TROUBLE DIAGNOSES ~ Partial Load Advance (PLA) Control (Cont'd) LHD models

EC-PLA-01

~~~~K

Refer to EL-POWER.

(JIB)

IN;91

IIN•41

BR

B/Y

I

I

BR

B/Y

~ IGN

START

Iffsn

PLR

REV

11~81

~

Y

L!Y

GND-S /12.311 B/W

ECM (ENGINE CONTROL MODULE) GND-S 13.61 B/W

I I f-t_I t Y ~

L!Y

B!W

Y

L!Y

B!W

TW

@

~

G!B

1

._--~.

To engine coolant temperature sensor (Refer to EC-COOL!F.)

IrlsJ~ - M.-B - ~I&~ - -- ~r;]ID1 'T' (E101) L:jf' "T'

1c!J~~ ~cL~ - -- ~c!J1 =r'

=r'

Y

L!Y

B!W

!

L~Y

B~Wt

<=j= (E231)

rrh

m

m

INJECTION PUMP ENGINE SPEED SENSOR

SOLENOID TIMER

(E214)

Refer to last page (Foldout page) . ~

~~ ~

GY

\ill)

(E214) GY

HEC090

EC-400

TROUBLE DIAGNOSES ~ Partial Load Advance (PLA) Control (Cont'd) RHO models

EC-PLA-02

FUSE BLOCK

Refer to EL-POWER.

(JIB)

~

IN;91 BR

•

IN.41 B/Y

I

I

B/Y

BR

Wail

~

IGN


START

PLR 11~BI Y

REV ~ L/Y

GND-S 112•31 B/w

I I fY

~

I$t~

_M~-

Y

L/Y

B/W

L/Y

B/W

GND-S 13.,61 B/W

t-, t

TW

~

~ G/B

I

To engine coolant .......... ~. temperature sensor (Refer to EC-COOL/F.)

~t~ ---~$I

4r=~~t---~ Y

L/Y

B/W

! m

L~Y

B~Wt

m

rn

INJECTION PUMP SOLENOID TIMER

ENGINE SPEED SENSOR

(E214)


M\

~(E203)

rn:rn:tIlID

GY

t:]lV

(~!4) GY

HECC91

EC-401

TROUBLE DIAGNOSES ~ Partial Load Advance (PLA) Control (Cont'd) INSPECTION START

~i5 D~CONNECTORII lOB

CHECK OVERALL FUNCTION. 1) Start engine. 2) Check voltage between ECM terminal

OK

INSPECTION END

COO SEF040Q

and ground. Voltage: Engine coolant temperature is lower than 10'C (50' F) Battery voltage Engine coolant temperature is higher than 60'C (140'F)

OV

~i5 II

ECM

M

CHECK INPUT SIGNAL CIRCUIT. 1) Disconnect ECM harness connector. 2) Disconnect injection pump harness connector. 3) Check harness continuity between ECM terminal COO and terminal @.

NG


NG

Replace solenoid timer, engine speed sensor.

Continuity should exist. OK

II

CONNECTOR

10B

CHECK COMPONENT (Solenoid timer, engine speed sensor). Refer to "COMPONENT INSPECTION" on next page. OK SEF949P

Disconnect and reconnect harness connectors in the circuit. Then retest. Trouble is not fixed. Check ECM pin terminals for damage or the connection of ECM harness connector. Reconnect ECM h~rness connector and retest.

EC-402

TROUBLE DIAGNOSES ~ Partial Load Advance (PLA) Control (Cont'd) COMPONENT

INSPECTION

Solenoid timer 1. Disconnect solenoid timer harness connector. 2. Apply battery voltage to solenoid timer terminals for operating sound. Condition

and listen

Operating sound

With battery voltage applied

Yes

Without battery voltage applied

No

If NG, replace power steering

oil pressure

switch.

Engine speed sensor 1. 2.

Disconnect engine speed sensor harness connector. Check resistance between terminals @ and CID. Resistance: Approximately 1.6Q If NG, replace fuel pump.

EC-403

•

TROUBLE DIAGNOSES Cooling Fan Control SYSTEM DESCRIPTION Vehicle speed



ECM (Engine


control module)

Cooling fan relay(s)

Air conditioner "ON" signal


The ECM controls the cooling fan corresponding to the vehicle speed, engine coolant temperature, air conditioner system pressure and air conditioner ON signal. The control system has 3-step control [HIGH/LOW/OFF]. Operation Q>

...LL :J


~LL :J

0

~~

eZ;

100 (212)

E 2

95 (203)

c

90 (194)

E

95 (203)

C

90 (194)

2

'"

'"

'0 o

'0 o

U

U

Q>

Q>

o:

100 (212)

~o

~o

c '5> c: w


0

c '5> c w

20 80 (12) (50) Vehicle speed kmfh (MPH)

Cooling fans do not operate.

1222l:

Cooling fans operate at "Low"

speed.

20 80 (12) (50) Vehicle speed kmfh (MPH) ~ : Cooling fans operate at "High"

speed. SEF953P

EC-404

TROUBLE DIAGNOSES Cooling Fan Control (Cont'd)

EC-COOL/F-01


FUSE BLOCK 10A

1251

Refer

(JIB)

to

:

EL-POWER.

LHD mode 1s RHO models

... ------------.


@ @

1~

R

1~

R/Y

~

B/R

BR

----I

I

PU/R

B;

CHID R Iu)~&~1)~u)J1

~

R/Y~

PUlA

R/Y

R/Y


VSP

LG/R

It

L

I0--t

R

A

R/FAN1

~

o

~

LG

R

1$~~i~1

rrT6TI

~

EC-COOLlF-03

-----------0 ---------I~-LI.

~

R/FAN2

~TO

O~LG/R

~LG/R;l

C:

CHID: (EiOt)

-ea::::-

LG

L

LG/R.

L

~

LG LG/R

=1 I(C:-

~~

rv R/Y

(J

VEHICLE SPEED SENSOR

@lID

.0- .... -- LG/R~}

CHID:~ LG.

R

To EC-COOL/F-03 LG

--O-_ .... _.

LG

-@>: Refer to last page (Foldout page) .

~~

~~

~B

~B

~~

tW

GY

HEC092

EC-405

•


EC-COOL/F-02

iJ

_

ENGINE COOLANT TEMPERATURE SENSOR ~

(6): LHD models (B): RHO models

lLj:U GIS

S/W

It
I

o

~

(E203) ~

~11lJ1 GIS

S/W ~

IciJl
GIS

S/W

GIS

@QD~

:>

S/W

d!b:. ~ d!b:. Icpt (ES-) - -1~1

S/W

I

I <:BID

L

GIS ~

t'ETr\'i\

db ~

I

I

S/W I~I@QD

S/W ,.,.b

;,:@

1~~-M8--~ GIS @ S/W

I~I

GIS

t

L

o

o

I

iTlJ

t

S/W

GIS

I@I

S/W

100'

1l@1

GND-S

TW

GND-S

I

(ENGINE EeM

CONTROL MODULE)

@


~~ @GY

~(E203)

rnmz:mI

~~ GY

~GY

HEC093

EC-406


EC-COOL/F-03

rt~30A LVffi ~[]] GY

G/W

I

~g,COOL/F ~

8R

GY

I

,1=

e

=,-I-F

BA

Refer to EL-POWER.

G/W

GY LG/8

COOLING I I:!:' I:!r FAN n 1:1]1n ~OOLINGI:~:I FAN RELAY-1 U U RELAY-2

IJjI n 1:1]1n

COOLING

lbi=Jl ~

U

1

IbjJJ lbj.JJ ~

(ill)

LG/R G/8

To

EC-COOL/F -01

I

8R

{~LG/R:J * _--I~~

....

LG

~

bl=l-J -

G/R

LG •

G/Y

U1

COOLING FAN MOTOR-1

~~~AY-3 I

8

I ....

----

:!: 8R

•

I

G/W LG/R

1:1]' 1:1]1 ~

~1

IbjJJ lbi=Jl ~ LG G/OR

8

I--~t

t

COOLING FAN MOTOR-2 ~

rn

i

" S

8

-!-

-!-

m CE51) ~ ~

(ill), (ffi) , (ffi) 8R

8R

8R

~@,rn ~GY

GY

HEC094

EC-407

TROUBLE DIAGNOSES Cooling Fan Control (Cont'd) INSPECTION START

CHECK COOLING FAN LOW SPEED OPERATION. 1) Turn ignition switch "OFF".

NG

Check cooling fan low speed control circuit.

I

(Go to PROCEDURE C

P

2) Disconnect engine coolant temperature sensor connector. SEF168R

3) Disconnect cooling fan relays 1, 2 and 3. 4) Turn ignition switch "ON". 5) Reconnect cooling fan relay 1. 6) Make sure that cooling fan operates at low speed. OK

CHECK COOLING FAN HIGH SPEED

SEC163BA

OPERATION. 1) Turn ignition switch "OFF". 2) Reconnect cooling fan relay-2 and cooling fan relay-3. 3) Turn ignition switch "ON". 4) Make sure that cooling fan operates at high speed. OK INSPECTION END

EC-408

NG

Check cooling fan high speed control circuit. (Go to PROCEDURE D

I

I.)


~i5

PROCEDURE C

3 7 5 1 ~2

INSPECTION START

[!]

SEF956P

~~---Cooling fan motor-2

CHECK POWER SUPPLY. 1) Turn ignition switch "OFF". 2) Disconnect cooling fan relay-1. 3) Turn ignition switch "ON". 4) Check voltage between terminals G), @, @ and ground. Voltage: Battery voltage

NG

--.-.

~ • • • •

10A fuse 30A fusible links 75A fusible link Harness continuity between cooling fan relay-1 and fuse • Harness continuity between cooling fan relay-1 and battery If NG, repair harness or connectors.

OK

-----~_._----------

--------------------

o SEF857P

~i5

~i5 A

I!l

7 5

2

.~

Cooling fan motor-1

.~

Cooling fan motor-2

\nY

3

1

\nY

CHECK GROUND CIRCUIT. 1) Turn ignition switch "OFF". 2) Disconnect cooling fan motor-1 harness connector and cooling fan motor-2 harness connector. I!] 3) Check harness continuity between terminal (J) and terminal G) , terminal @ and terminal G) . Continuity should exist. 4) Check harness continuity between terminal @ and body ground. Continuity should exist.

Check the following. • Harness connector

NG

--.-.


II

SEF041Q

OK

[j

~

CHECK OUTPUT SIGNAL CIRCUIT. 1) Disconnect ECM harness connector. 2) Check harness continuity between ECM terminal @ and terminal (?). Continuity should exist.

~

\WI

\ttV Cooling fan motor-2

Cooling fan motor-1

NG

f--..-

@D,@ • Harness continuity between cooling fan relay-1 and ECM If NG, repair harness or connectors.

OK

SEF042Q

~i5 ECM

E

CONNECTOR

CHECK COMPONENT (Cooling fan relay-1). Refer to "COMPONENT INSPECTION". (See page EC-412.) ~OK

II

9

SEF958P

EC-409


NG

f--..-


•

TROUBLE DIAGNOSES Cooling Fan Control (Co nt' d) @

CHECK COMPONENT (Cooling fan motors). Refer to "COMPONENT INSPECTION". (See page EC-412.)

NG


OK Disconnect and reconnect harness connectors in the circuit. Then retest. Trouble is not fixed. Check ECM pin terminals for damage or the connection of ECM harness connector. Reconnect ECM harness connector and retest.

I PROCEDURE D INSPECTION START

SEF168R

~i5

CHECK POWER SUPPLY. 1) Turn ignition switch "OFF". 2) Disconnect cooling fan relay-2 and cooling fan relay-3. 3) Turn ignition switch "ON". 4) Check voltage between cooling fan relay-2, 3 terminals (!J, @ and ground. Voltage: Battery voltage

~

rntJ

OK

Coolingfan relay. 2,3

SEF959P

EC-41 0

NG


(ill!) • • • •

10A fuse 30A fusible links 75A fusible link Harness continuity between cooling fan relay-2, 3 and fuse • Harness continuity between cooling fan relay-2, 3 and battery If NG, repair harness or connectors.

TROUBLE DIAGNOSES Cooling Fan Control (Cont'd) @

1:1

1

~i5 :~[W=ill

Coolingfan relay-2

AG<

\lliJ

Cooling fan motor -2,3

harness connector

CHECK GROUND CIRCUIT. 1) Turn ignition switch "OFF". 2) Disconnect cooling fan motor-1 harness connector and cooling fan motor-2, 3 harness connectors. 3) Check harness continuity between terminal @ and terminal @, terminal @ and terminal @, terminal iJ) and body ground. Continuity should exisl.

ECM

~

CONNECTOR

CHECK COMPONENT (Cooling fan relay-2, 3). Refer to "COMPONENT INSPECTION" on next page.

II

10

NG

---..


@!D,@ • Harness continuity between cooling fan relay-2, 3 and ECM If NG, repair harness or connectors.

OK

SEF960P

II

•

OK

-

CHECK OUTPUT SIGNAL CIRCUIT 1) Disconnect ECM harness connector. 2) Check harness continuity between ECM terminal @ and terminal @. Continuity should exisl.

~i5


1:1

0

o

NG

---...

NG

f----+

Replace cooling fan relays.

OK

SEF043Q

CHECK COMPONENTS (Cooling fan motors). Refer to "COMPONENT INSPECTION" on next page. OK Disconnect and reconnect harness connectors in the circuit. Then retest. Trouble is not fixed. Check ECM pin terminals for damage or the connection of ECM harness connector. Reconnect ECM harness connector and retest.

EC-411

NG

f----+


TROUBLE DIAGNOSES Cooling Fan Control (Cant' d) COMPONENT

INSPECTION

Cooling fan relays-1, -2 and -3 Check continuity between terminals @ and

CID, CID and (l).

Conditions

Continuity

12V direct current supply between

Yes

terminals G) and @ No current supply

No

SEC202B

If NG, replace relay.

Cooling fan motors-1 and -2 Cooling fan motor-1 harness connector

1. Disconnect cooling fan motor harness connectors. 2. Supply cooling fan motor terminals with battery voltage and check operation. Terminals


Speed (EB)

(8)

Cooling fan motor-1

Low

G)

@

High

@,e!)

@,@

Cooling fan motor-2

Low

e!)

@

@,e!)

@,@

SEF044Q

High

Cooling fan motor should operate.

If NG, replace cooling fan motor.

EC-412

TROUBLE DIAGNOSES Air Conditioner Cut Control SYSTEM DESCRIPTION Air conditioner switch


A/C ON signal



The air conditioner is turned off under the following conditions: RHO models . • Engine coolant temperature is higher than grC (20rF) LHD models • Engine coolant temperature is higher than 105°C (221°F) For trouble diagnoses, refer to "TROUBLE DIAGNOSES" in HA section.

EC-413


•

TROUBLE DIAGNOSES Air Conditioner Cut Control (Cont'd) LHD models

EC-A/CCUT-01 FUSE BLOCK

Refer to EL-POWEA.

(JIB)

L/Y

~ (BOO)

1~11I~211~1 LIB LG/R LG/R

II-~ -IT ~IA/C ~L

OFF

,

I I I I

m

~

~~_.

...

n

HIGH

THERMISTOR

I

._

I

G/B

L/R.

I

DUALPRESSURE SWITCH

NORMAL

._-~--_. rn ~

G/B

rn LOW

ON

~

U UID

4=JJ~ L L/R

I!4Jl G

~~1;1$1 m COMP

t

B

IriDl


A/C

----------

I

?iJ

OFF--

~~~TCH

~

~ B

• ..,

1~

mm

@

I

(E64) (E65)

I

R/L

G

BOX NO.2 (JOINT CONNECTORS) ~

G/Y

VALVE

IkjJ

G/Y

m JUNCTION

To compressor (Refer to HA-A/C.) ~

00 ~E~N~~gD

~

A/C SWITCH @

ON OFF

THERMO CONTROL AMP.

RIL ~

RELAY

I I

LG/R

LIB L/Y

n

LG/R~

I 1 i....l ~~ r1 B B

B


IQl@

~(E16)

T

L

~-----------.,

JS4.ffi

(tiS)

~

B

CMID , (El0n lf1@

I

I

L I

~I

:ITl~ ~~:

W

, (E106)

~

HEC095

EC-414

TROUBLE DIAGNOSES Air Conditioner Cut Control (Cont'd) RHO models

EC-A/CCUT-02 FUSE BLOCK (JIB)

Refer

to

EL-POWER.

@g)

UQ-lil I N.21 I N.21

II IT ]/,/c LIB

OFF

LG/R LG/R

---Im

I

LIB

I I I I I I

THERMO LG R CONTROL AMP.~

L/Y

n

LG/R~

_e

NORMAL

OUALPRESSURE SWITCH

(E101) (BID -

L/R

~

L/R

-e=~Y, B

'-B~ •

To compressor

L/R.

(~~~~/Ctf

~

m

~~:CTOR-4

OFF-- ON

~


B

B

B

1

I ~---------@

L'Ql@

[[[g@]

B

L

B

~

(BID , (E101) ~ ,
W

r----------., C!J.S)

B


L

I I~ I

B

t..l t..l

@

A~ T J

~~;CH

+--, n I

Irfnl A/C

I

~~

B

R/L

COMP

LG/B

W

t

G

LG/B

@!QD ~

. ffi

db (E101) I~I(][)

~

IACV-FICD SOLENOID VALVE

THERMISTOR

-

ffi

4=U G

1Ql ~

@

ON

r L.. m L

...

OFF

~GY~

RELAY

~lbi=ll L L/R

HIGH

SWITCH

~

R/L ~

U~

LOW

A/C

ON

I

F.1 (B10n B (B102) I ITI:illIIITIIII B

~

B

I~ I

@ P

~ 123456

~ W

.J

HEC096

EC-415

•

TROUBLE DIAGNOSES Fuel Cut Control

EC-FCUT-01 IGNITION SWITCH ON or START

10A

1251

FUSE BLOCK

Refer to EL-POWER.

(JIB)
(b):

:

BR

LHO mode Is RHD models

SR

liJ~ 1!:iJl@

~@)

~m» BR

BR

t o

I

BR

m

INJECTION PUMP FUEL CUT SOLENOID VALVE

~


~~ ~S

~~

m:zm

~~

GY

\IDZJ

EC-416

GY

HEe09?

SERVICE DATA AND SPECIFICATIONS

(SOS)

General Specifications PRESSURE REGULATOR Regulated pressure kPa (bar, kg/cm2, psi)

299 (2.99, 3.05, 43.4)

Inspection and Adjustment Idle speed'1

rpm

No-load'2

GA14DE, GA16DE for Europe and Israel AIT: 800:1:50 Models with daytime light system MIT: 800:1:50 Models without daytime light system M/T: 700:1:50 GA15DE M/T: 630:1:50 A/T: 750:1:50 GA16DE for Australia M/T: 675:1:50 A/T: 800:1:50 GA16DE except for Europe and Israel, and Australia M/T: 650:1:50 A/T: 800:1:50

Ignition timing

GA 14DE, GA 16DE for Europe and Israel and GA16DE except for Australia 10':1:2' BTDC GA15DE 6':1:2' BTDC GA16DE for Australia 8':1:2' BTDC

Throttle position sensor idle position'3 V

Temperature

'c

('F)

Resistance kn

20 (68)

2.1 - 2.9

90 (194)

0.24 - 0.26

110 (230)

0.14-0.15

•

FUEL PUMP Resistance [at 25'C (77'F)]

n

Approximately

0.2 - 5

IACV-AAC VALVE

900 or more

Air conditioner: ON

ENGINE COOLANT TEMPERATURE SENSOR

Resistance [at 25'C (77'F))

n

Approximately 10 (For Europe and Israel) 50 - 100 (Except for Europe and Israel)

INJECTOR

0.40. 0.60

'1: Feedback controlled and needs no adjustments '2: Under the following conditions: • Air conditioner switch: OFF • Electric load: OFF (Lights, heater, fan & rear defogger) • A/T models: in "N" position '3: Engine is warmed up SUfficiently.

Resistance [at 25'C (77'F))

n

Approximately

10. 14

RESISTOR Resistance [at 25'C (77'F)]

kn

Approximately

2.2

IGNITION COIL Primary voltage Primary resistance [at 20'C (68'F)] Secondary resistance [at 20'C (68'F)]

V

12

n

Approximately 0.5 - 1.0

kn

Approximately

THROTTLE POSITION SENSOR

12

Accelerator pedal conditions Completely released Partially released Completely depressed ': Engine is warmed up sufficiently.

MASS AIR FLOW SENSOR Supply voltage

V

Battery voltage

Output voltage

V

1.2 - 1.8'

': Engine is warmed up SUfficiently and idling under no-load.

EC-417

Resistance kn [at 25'C (77'F)) Approximately

0.5'

0.5 - 4 Approximately

4

SERVICE DATA AND SPECIFICATIONS

(SOS)

General Specifications PRESSURE REGULATOR Fuel pressure at idling kPa (bar, kg/cm2, psi) Vacuum hose is connected

Approximately 235 (2.35. 2.4. 34)

Vacuum hose is disconnected

Approxi mately 294 (2.94, 3.0, 43)

Inspection and Adjustment Idle speed'1

FUEL PUMP

rpm

Resistance [at 25'C (77'F)]

No-load'2

Air conditioner: ON (in "N" position)

Approximately

0.2 - 5.0

850 or more

IACV-AAC VALVE

Ignition timing

15':1:2' BTDC Resistance [at 25'C (77'F)]

Throttle position sensor idle position

V

COIL

Approximately

10.0

INJECTOR Resistance [at 25'C (77'F))

n '

1_0_-_1_4

_

RESISTOR

Primary voltage

V

12 Resistance [at 25'C (77'F))

Primary resistance [at 25'C (77'F))

kn

ApproXimately 2.2

0.5 - 1.0

Secondary resistance [at 25'C (77'F))

Approximately 25

kn

THROTTLE

POSITION SENSOR

Throttle valve conditions


Completely closed

Supply voltage

V

Battery voltage (11 - 14)

Output voltage

V

1.3 - 1.7'

Partially open Completely open

': Engine is warmed up sufficiently and idling under no-load.

ENGINE COOLANT TEMPERATURE SENSOR Temperature

n

0.35 - 0.65

'1: Feedback controlled and needs no adjustments '2: Under the following conditions: • Air conditioner switch: OFF • Electric load: OFF (Lights, heater fan & rear defogger)

IGNITION

n

800:1:50

(in "N" position)

'c

('F)

Resistance kn

20 (68)

2.1-2.9

50 (122)

0.68 - 1.00

90 (194)

0.236 - 0.260

HEATED OXYGEN SENSOR HEATER Resistance [at 25'C (77'F)]

n

I

3.3 - 6.3

EC-418

Resistance kn [at 25'C (77'F)] Approximately

1

1 - 10 Approximately

10

SERVICE OATA AND SPECIFICATIONS

(SOS)

VE-type Injection Pump Pump numbers

GENERAL SPECIFICATIONS Unit: Engine

rpm

CD20

Idle speed

FICO: OFF

700~~O

FICO: ON

800

Dash pot touch speed

1,300

Maximum

5,400

engine speed

INSPECTION

Engine

Part number

Pump assembly number

CD20

16700-75J01

104740-2610

Pump data is not yet available. (Pump data will be given by Technical Bulletin, or refer to CALIBRATION STANDARD published by ZEXEL.)

•

AND ADJUSTMENT

Installation of injection pump Engine Plunger lift (Injection timing)

CD20 mm (in)

0.79 - 0.85 (0.0311 - 0.0335) (equivalent to 8' BTDC)

Injection Nozzle INSPECTION

AND ADJUSTMENT

Adjusting shims

Injection nozzle assembly

Thickness Unit: kPa (bar, kg/em', psi)

Initial injection pressure New

Used

12,749 - 13,534 (127.5 - 135.3, 130 - 138,1,849 - 1,962) 12,259 - 13,239 (122.6 - 132.4, 125 - 135, 1,778 - 1,920)

EC-419

mm (in)

Parts No.

0.50 (0.0197)

16613-V0700

0.54 (0.0213)

16613-V0702

0.58 (0.0228)

16613-V0704

062 (0.0244)

16613-V0706

0.66 (0.0260)

16613-V0708

0.70 (0.0276)

16613-V0710

0.74 (0.0291)

16613-V0712

0.78 (0.0307)

16613-V0714

0.82 (0.0323)

16613-V0716

0.86 (0.0339)

16613-V0718

0.90 (0.0354)

16613-V0720

0.94 (0.0370)

16613-V0722

0.98 (0.0386)

16613-V0724

1.00 (0.0394)

16613-V0760

Nissan Almera n15 - Engine Control System.pdf

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