DIAGNOSTICS ENGINE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DI–1
HOW TO PROCEED W ITHTROUBLESHOOTING . . . . . . . . . . . . . .
DI–1
CUSTOMER PROBLEM ANALYSIS CHECK . . .
DI–2
PRE–CHECK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DIAGNOSTIC TROUBLE CODE CHART . . . . . .
DI–3 DI–14
PARTS LOCATION
.......... .......... .....
TERMINALS OF ECU
PROBLEMSYMPTOMSTABLE CIRCUITINSPECTION
DI–18
. . . . . . . . . . . . . . . . . . . . . . DI–20 .......... ...
DI–24
......... ........... .
DI–26
DI–1 DIAGNOSTICS –
ENGINE
ENGINE DI4DW–10
HOW TO PROCEED WITH TROUBLESHOOTING Troubleshooting in accordance with the procedure on the following pages. Titles inside are the titles of pages in this manual with the page number indicated in the bottom portion. See the indicated pages for detailed explanations.
Vehicle Brought to Workshop 1
2
Customer Problem Analysis P. DI–2
Connect hand–held tester to DLC3 P. DI–3 If display indicates a communication fault in tool, inspect DLC3 P. DI–3
3
Check DTC and Freezed Frame Data (Pre–check) Record or Print DTC and Freezed Frame Data P. DI–3
4
Clear DTC and Freezed Frame Data P. DI–3
5
Visual Inspection
6
Setting Check (Test) Mode Diagnosis P. DI–3
7
Problem Symptom Confirmation If engine does not start, perform steps 10 and 12 first Malfunction does not occur. Malfunction 8 Symptom Simulation P IN–10. occurs.
9
DTC Check P. DI–3 Normal
10
Malfunctioncode.
Basic Inspection P. DI–3 12
14
16
Adjustment, Repair
17
Confirmation Test
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
13
Circuit Inspection P. DI–26
Check for Intermittent Problems P. DI–3
Identification of Problem
End
DTC Chart P. DI–14
Problem Symptoms Table P. DI–24
Parts Inspection 15
11
DI–2 DIAGNOSTICS –
ENGINE DI4DX–04
CUSTOMER PROBLEM ANALYSIS CHECK ENGINE CONTROL SYSTEM Check Sheet
Inspector’s Name
Customer’s Name
Model and Model Year
Driver’s Name
Frame No.
Data Vehicle Brought in
Engine Model
License No.
Odometer Reading
s m o t p m y S m le b o r P
km miles
Engine does not Start
E n g i n e d o e s n o tc r an k
Difficult to Start
Engine cranks slowly Other
Poor Idling
I n c o r re c t f i rs t i d l e I d l i n g r p m i s a b n o rm a l R o u g hi d l i n g O the r
Poor Drivability
He s it at io n Kn o c k i n g
Engine Stall
So o n a f t e r s t a r t i n g A f t e r ac c e le r ato r p e d a l d e p re s se d Af te r ac cel erat or pe da l rel ease d Du rin g A/C op erat io n S hif ting f r om N to D O the r
N oi n i t i a l c o m b u s t i o n
B ac kf i re O the r
Noc o m p le t ec o m b u s t i o n
Hi g h (
rp m )
L ow (
M u f f l e rex p l o s i o n( af t er – f i re )
Sur ging
Others
Data Problem Occurred Cons ta nt Other
Problem Frequency
n rs e u hc Wc nO o it m i e d lb no or CP
S o m et i m e s (
tim e s pe r
d a y /m onth)
Weather
Fine
Cloud y
Rainy
Snowy
Outdoor Temperature
Ho t
Wa r m
Cool
Co ld( a p p r o x .
Place
Hi g h w a y R o u g hro a d
Engine Temp.
Cold
Engine Operation
S t a rt in g J u s ta f t e rs t a rt i n g( D r i vi n g C o n s t a n ts p e e d A / Cs w i t c h O N /O F F O the r
Condition of check engine warning light (CHK ENG) Normal mode DTC Inspection
Sub urb s O t h er Wa r m i n gu p
R em a i n so n N o rm a l
(Pre–check) Check Mode
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
N o rm a l
I n n e rC i t y
m in.)
Va r i o u s/ O t h er F/
Up h i l l
A f t erWa r m in gu p
O n ce o n l y
An yt em p .
I d li n g A cc e l er a ti o n
S o m e t i m esl ig h t su p
C)
Downhill
O the r Racing D ec e l er a ti o n
D o e sn o tl i g h tu p
Ma lf unc tion c od e (s ) (c od e
)
Freezed frame data (
)
Ma lf unc tion c od e (s ) (c od e Freezed frame data (
) )
rpm )
DI–3 DIAGNOSTICS –
ENGINE DI80S–01
PRE–CHECK 1. (a)
A13822
DIAGNOSIS SYSTEM Description When troubleshooting Euro–OBD vehicles, the only difference from the usual troubleshooting procedure is that you need to connect the vehicle to the OBD scan tool complying with ISO 15031–4 or hand–held tester, and read off various data output from the vehicle’s engine ECU.
Euro–OBD regulations require that the vehicle’s on–board computer lights up the Check Engine Warning Light (Malfunction Indicator Lamp)/CHK ENG (MIL) on the instrument panel when the computer detects a malfunction in the emission control system/components or in the powertrain control components which affect vehicle emissions, or a malfunction in the computer. In addition to CHK ENG (MIL) lighting up when a malfunction is detected, the applicable Diagnostic Trouble Codes (DTCs) prescribed by ISO15031–6 are recorded in the engine ECU memory (See page DI–14). If the malfunction is not detected in 3 consecutive trips, CHK ENG (MIL) goes off automatically but the DTCs remain recorded in the engine ECU memory.
Hand–held Tester
DLC3
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
A14194
To check the DTCs, connect the OBD scan tool or hand–held tester to the Data Link Connector 3 (DLC3) on the vehicle. The OBD scan tool or hand– held tester also enables you to erase the DTCs and check freeze frame data and various forms of engine data. (For operating instructions, see the OBD scan tool’s instruction book.) DTCs include ISO controlled codes and manufacturer controlled codes. ISO controlled codes must be set as prescribed by the ISO, while manufacturer controlled codes can be set freely by the manufacturer within the prescribed limits (See DTC chart on page DI–14).
DI–4 DIAGNOSTICS –
ENGINE
The diagnosis system operates in the normal mode during normal vehicle use. It also has a check mode for technicians to simulate malfunction symptoms and troubleshoot. Most DTCs use 2 trip detection logic* to prevent erroneous detection, which ensures the malfunction detection. By switching the engine ECU to the check mode when troubleshooting, the technician can cause the CHK ENG (MIL) to light up for a malfunction that is only detected once or momentarily (Hand–held tester only) (See step 2). *2 trip detection logic: When a malfunction is first detected, the malfunction code is temporarily stored in the engine ECU memory (1st trip). If the same malfunction is detected again during the second drive test, this second detection causes the CHK ENG (MIL) to light up (2nd trip) (However, the ignition switch must be turned OFF between the 1st trip and the 2nd trip.). Freeze frame data: Freeze frame data records the engine condition when a misfire (DTCs P0300 – P0304) or fuel trim malfunction (DTCs P0171, P0172, P0174 and P0175, however, P0174 and P0175 are only for 1ZZ–FE engine.) or other malfunction (first malfunction only) is detected. Freeze frame data records the engine conditions (fuel system, calculated load, engine coolant temperature, fuel trim, engine speed, vehicle speed, etc.) when the malfunction is detected. When troubleshooting, it is useful to determine whether the vehicle was running or stopped, the engine was warmed up or not, the air–fuel ratio was lean or rich, etc. at the time of the malfunction. Priorities for troubleshooting: If troubleshooting priorities for multiple DTCs are given in the applicable DTC chart, these should be followed. If no instructions are given, troubleshoot the DTCs according to the following priorities. (1) DTC s other than fuel tri m malf unct ion (DT Cs P0171, P0172, P0174 and P0175, however, P0174 and P0175 are only for 1ZZ–FE engine) and misfire (DTCs P0300 – P0304). (2) Fuel trim malfunction (DTCs P0171, P0172, P0174 and P0175, however, P0174 and P0175 are only for 1ZZ–FE engine). (3) Misfire (DTCs P0300 – P0304).
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
DI–5 DIAGNOSTICS –
(b)
12345678 9 1011121 3141 516
ENGINE
Check the DLC3. The vehicle’s engine ECU uses the ISO 9141–2 communication protocol. The terminal arrangement of DLC3 complies with ISO 15031–3 and matches the ISO 9141–2 format.
DLC3 A04550
TerminalNo.
Connection/VoltageorResistance
7
Bus L ine/Pulsegeneration
4
ChassisGround–BodyGround/1 oΩ
16
Condition Duringtransmission less r
BatteryPositive–BodyGround/9–14V
Always Always
HINT: If your display shows UNABLE TO CONNECT TO VEHICLE when you have connected the cable of the hand–held tester to the DLC3, turned the ignition switch ON and operated the scan tool, there is a problem on the vehicle side or tool side. If the communication is normal when the tool is connected to another vehicle, inspect the DLC3 on the srcinal vehicle. If the communication is still not possible when the tool is connected to another vehicle, the problem is probably in the tool itself, so consult the Service Department listed in the tool’s instruction manual. 2. Normal Mode: INSPECT DIAGNOSIS (a) Check the DTC. NOTICE: Hand–held tester only: When the diagnosis system is switched from the normal mode to the check mode, it erases all DTCs and freeze frame data recorded in the normal mode will be erased. So before switching modes, always check the DTCs and freeze frame data, and note them down.
(1) (2) (3) (4) (5) A13822
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
The CHK ENG (MIL) comes on when the ignition switch is turned ON and the engine is not running. Prepare the hand–held tester. Connect the hand–held tester to the DLC3. Turn the i gnition switch ON and push the hand–held tester main switch ON. Use the hand–held tester to check the DTCs and freeze frame data, and note them down. (For operating instructions, see the hand–held tester instruction book.)
DI–6 DIAGNOSTICS –
(6)
ENGINE
See page DI–14 to confirm the details of the DTCs. (b) Clear the DTC. The DTCs and freeze frame data will be erased by either actions. (1) Operating the han d–held tester to erase the codes. (See the hand–held tester’s instruction book for operating instructions.) (2) Disconnecting the battery terminals or EFI fuse. NOTICE: If the hand–held tester switches the engine ECU from the normal mode to the check mode or vice–versa, or if the ignition switch is turned from ON to ACC or OFF during the check mode, the DTCs and frozen frame data will be erased. 3. Check ( Test) m Mode: INSPECT DIAGNOSIS HINT: Compared to the normal mode, the check mode has an increased sensitivity to detect malfunctions.Furthermore, the same diagnostic items which are detected in the normal mode can also be detected in the check (test) mode. (a) Check the DTC. (1) Initial conditions Battery voltage 11 V or more Throttle valve fully closed Transmission in P or N position A/C switched OFF (2) Turn the ignition switch OFF. (3) Prepare the hand–held tester. (4) Connect the hand–held tester to the DLC3. (5) Turn the i gnition switch ON and push the hand–held tester main switch ON. (6) Switch the hand–held tester from the normal mode to the check (test) mode. (7) Check if the CHK ENG (MIL) blinks. NOTICE: If the hand–held tester switches the engine ECU from the normal mode to the check mode or vice–versa, or if the ignition switch is turned from ON to ACC or OFF during the check mode, the DTCs and freezed frame data will be erased. (8) Start the engine. (9) Simulat e the condi tions of the malfunc tion described by the customer. NOTICE: Leave the ignition switch ON until you have checked the DTCs, etc.
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
DI–7 DIAGNOSTICS –
ENGINE
(10) After simulating the malfunction conditions, use the hand–held tester diagnosis selector to check the DTCs and freeze frame data, etc. HINT: Take care not to turn the ignition switch OFF. Turning the ignition switch OFF switches the diagnosis system from the check (test) mode to the normal mode. so all the DTCs, etc. are erased. (11) After checking the DTC, inspect the applicable circuit. (b)
Vehicle Harness Hand–held Tester
Interface Box
Toyota Break–out–box
N09348
Using break–out–box and hand–held tester, mesure the engine ECU terminal values. (1) Hook up the break–out–box and hand–held tester to the vehicle. (2) Read the en gine ECU input/output values by following the prompts on the tester screen. HINT: Hand–held tester has a ”Snapshot” function.This records the measured values and is effective in the diagnosis of intermittent problems. Please refer to the hand–held tester/break–out–box op erator’s manual for further details.
4. FAIL–SAFE CHART If any of the following codes are recorded, the engine ECU enters fail–safe mode. DTCNo. P0100
Fail–safeOperation Ignition timingisfixed at
Fail–safeDeactivationConditions Returned to normal condition
P0110
Intake air temperature is fixed at 20 C (68F)
Returnedtonormalcondition
P0115
Water temperature is fixed at 80
Returned to normal condition
P0120
VTA is fixed at 0
The following condition must be repeated at least 2 times consecutively when closed throttle position switch is OFF: VTA 0.1 V and 0.95 V P0135 P0141 P0155 P0325
The heater circuit in which an abnormality is detected is turned off
Ignition switch OFF
Max.timingretardation
IgnitionswitchOFF
Fuel cut
Returned to normal condition
P1300 P1305 P1310 P1315 It cut electrically the circuit in which an abnormality is deP1656
tected
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
Returned to normal condition
DI–8 DIAGNOSTICS –
ENGINE
5. CHECK FOR INTERMITTENT PROBLEMS HINT: By putting the vehicle’s engine ECU in the check (test) mode, 1 trip detection logic is possible instead of 2 trip detection logic and sensitivity to detect open circuits is increased. This makes it easier to detect intermittent problems. (a) Clear the DTCs (See step 2). (b) Set the check (Test) mode (See step 3). (c) Perform a simulation test (See page IN–10). (d) Check the connector and terminal (See page IN–20). (e) Handle the connector (See page IN–20). 6. BASIC INSPECTION When the malfunction code is not confirmed in the DTC check, troubleshooting should be performed in all the possible circuits considered as the causes of the problems. In many cases, by carrying out the basic engine check shown in the following flow chart, the location causing the problem can be found quickly and efficiently. Therefore, use of this check is essential in the engine troubleshooting.
1
Is battery voltage 11 V or more when engine is stopped?
NO
Charge o r r eplace b attery.
NO
Proceed to p roblems table on page DI–24.
NO
Go to step 7.
YES
2
Is engine cranked?
YES
3
Does engine start?
YES
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
DI–9 DIAGNOSTICS –
4
ENGINE
Check air filter. PREPARATION: Remove the air filter. CHECK: Visually check that the air filter is not dirty or excessive oily. HINT: If necessary, clean the air filter with compressed air. First blow from inside thoroughly, then blow from outside of the air filter.
Outside
Inside A12619
NG
Repair or replace
OK
5
Check idle speed. TAC Tachometer
PREPARATION: (a) Warm up the engine to the normal operating temperature. (b) Switch off all the accessories. (c) Switch off the A/C. (d) (e) (f)
DLC3
SST
Battery
A14195
Shift the the transmission the Ntoposition. Connect h and–heldintester the DLC3 on th e vehicle. If you have no hand–held tester, connect tachometer tester prove to terminal TAC of the DLC3. SST 09843–18030 NOTICE: As some tachometers are not compatible with this ignition system, it is recommend to confirm the compatibility of your unit before use. CHECK: Check the idle speed. OK: Idle speed (w/ Cooling fan OFF and A/C OFF): 700 50 rpm
NG
OK
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
Proceed t o p roblem s ymptoms table on page DI–24.
DI–10 DIAGNOSTICS –
6
ENGINE
Check i gnition timing.
TC
SST DLC3
PREPARATION: (a) Warm up the engine to the normal operating temperature. (b) Shift the transmission in the N position. (c) Keep the engine speed at idle. (d) Using SST, connect terminals TC and CG of the DLC3. SST 09843–18040
CG A14196
(e)
Using a timing light, connect the tester to the ignition coil connector wire (See page EM–10). CHECK: Check the ignition timing. OK: Ignition timing: 1ZZ–FE
18 10 –
BTDC @ idle
3ZZ–FE
12 –8
BTDC @ idle
B00272
NG
Proceed to page IG–1 and continue to troubleshoot.
OK
Proceed to problem symptoms table on page DI–24.
7
Check f uel p ressure.
B10046
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
PREPARATION: (a) Be sure that enough fuel is in the tank. (b) Connect the hand–held tester to the DLC3. (c) Turn the i gnition switch ON and push hand–held tester main switch ON. (d) Use the ACTIVE TEST mode to operate the fuel pump. (e) Please refer to the hand–held tester operator’s manual for further details. (f) If you have no hand–held tester, connect the positive (+) and negative (–) leads from the battery to the fuel pump connector (See page FI–7, FI–13). CHECK: Check that pulsation damper screw rises up when the fuel pump operates.
DI–11 DIAGNOSTICS –
ENGINE
HINT: At this time, you will hear the fuel flowing noise. NG
Proceed to p age FI–7, FI–13 a nd continue t o troubleshoot.
OK
8
Check for spark.
PREPARATION: (a) Remove the air filter assembly. (b) Remove the ignition coil. (c) Remove the spark plug. (d) Install the spark plug to the ignition coil. (e) Disconnect 4 injector connectors. (f) Ground the spark plug. CHECK: Check if spark occurs while the engine is being cranked. NOTICE: Do not crash the electrode gap. To prevent excess fuel being injected from the injectors during this test, don’t crank the engine for more than 5 – 10 seconds at one time. NG
Proceed to page IG–1 and continue to troubleshoot.
OK
Proceed to problem symptoms table on page DI–24. 7. ENGINE O PERATING C ONDITION NOTICE: The values given below for ”Normal Condition” are representative values, so a vehicle may still be normal even if its value varies differ from those listed here. So do not depend solely on the ”Normal Condition” hera when deciding whether the part is faulty or not. Hand–heldtesterdisplay
MeasurementItem
NormalCondition*
Fuel System Bank 1 FUEL SYS #1
OPEN: Air–fuel ratio feedback stopped
Idling after warming up: CLOSED
CLOSED: Air–fuel ratio feedback operating Fuel System Bank 2 FUEL SYS #2
OPEN: Air–fuel ratio feedback stopped CLOSED: Air–fuel ratio feedback operating
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
Idling after warming up: CLOSED
DI–12 DIAGNOSTICS –
CALC LOAD COOLANTTEMP
ENGINE
Calculator Load: Current intake air volume as a
Idling: 25.7 – 46.4 %
proportion of max. intake air volume
Racing without load (2,500rpm): 19.7 – 40.5 %
WaterTemp.SensorValue
Afterwarmingup:80–
SHORTFT#1
Short–termFuelTrimBank1
0
20 %
LONGFT#1
Long–termFuelTrimBank1
0
20 %
SHORTFT#2
Short–termFuelTrimBank2
0
20 %
LONGFT#2
Long–termFuelTrimBank2
0
ENGINESPD
EngineSpeed
VEHICLESPD
VehicleSpeed
IGN ADVANCE
INTAKEAIR THROTTLE POS
O2S B1 S1
O2S B2 S1
O2S B1 S2
O2FT B1 S1
O2FT B2 S1
MIL ON RUN DIST INJECTOR MISFIRERPM MISFIRELOAD STARTERSIG A/C SIG PNPSW ELCTRCLLOADSIG CTP STOPLIGHTSW PS OIL PRESS SW
20 % Idling: 700 50 rpm (N position) Vehiclestopped:0km/h(0mph) Idling:
Ignition Advance: Ignition Timing of Cylinder No.
BTDC10 – 18 (1ZZ–FE)
1
BTDC 8 – 12 (3ZZ–FE)
IntakeAirTemp.SensorValue
Equivalenttoambienttemp.
Voltage Output of Throttle Position Sensor Calcu-
Throttle fully closed: 8 – 20 %
lated as a percentage: 0 V → 0 %, 5 V
Throttle fully open: 64 – 96 %
→
100 %
Voltage Output of Oxygen Sensor Bank 1 Sensor 1 Voltage Output of Oxygen Sensor Bank 2 Sensor 1 Voltage Output of Oxygen Sensor Bank 1 Sensor 2 Oxygen Sensor Fuel Trim Bank 1 Sensor 1
Idling: 0.1 – 0.9 V
Idling: 0.1 – 0.9 V
Driving (50 km/h, 31 mph): 0.1 – 0.9 V 0 20 %
(Same as SHORT FT #1)
0 20 %
Oxygen Sensor Fuel Trim Bank 2 Sensor 1 (Same as SHORT FT #1) Distance since activation of check engine warning light FuelinjectiontimeforcylinderNo.1
When there is no DTC: 0 km/h (0 mph) Idling:1.92–3.37ms
EngineRPMforfirstmisfirerange
Misfire0:0rpm
Engineloadforfirstmisfirerange
Misfire0:0g/r
Starter Signal
Cranking: ON
A/C Switch Signal
A/C ON: ON
Park/NeutralPositionSwitchSignal
PorNposition:ON
ElectricalLoadSignal
DefoggerswitchON:ON
ClosedThrottlePosition
Throttlefullyclosed:ON
StopLightSwitchSignal
StoplightswitchON:ON
Power Steering Oil Pressure Switch Signal
Turn steering wheel: ON
Fuel Cut Idle: Fuel cut when throttle valve fully FC IDL FC TAU CYL#1 – CYL#4 IGNITION INTAKECTRL VSV A/CCUTSIG
Fuel cut operating: ON
closed, during deceleration Fuel Cut TAU:Fuel cut during very light load
Fuelcutoperating:ON
Abnormalrevolution variation foreach cylinder
0%
Total number of ignition for every 1,000 revolutions IntakeAirControlValveVSVSignal A/C Cut Signal
0 – 400 VSVoperating:ON
A/CS/W OFF: ON
FUEL PUMP
Fuel Pump Signal
Idling: ON
EVAP(PURGE)VSV
EVAPVSVSignal
VSVoperating:ON
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
95C (176 – 203
DI–13 DIAGNOSTICS –
TOTAL FT B1
TOTAL FT B2
ENGINE
Total Fuel Trim Bank 1: Average value for fuel trim system of bank 1 Total Fuel Trim Bank 1: Average value for fuel trim system of bank 2
Idling: 0.5 – 1.4
Idling: 0.5 – 1.4
Oxygen Sensor Lean Rich Bank 1 Sensor 1: O2 LR B1 S1
Response time for oxygen sensor output to
Idling after warming up: 0 – 1,000 msec.
switch from lean to rich Oxygen Sensor Lean Rich Bank 2 Sensor 1: O2 LR B2 S1
Response time for oxygen sensor output to
Idling after warming up: 0 – 1,000 msec.
switch from lean to rich Oxygen Sensor Rich Lean Bank 1 Sensor 1: O2 RL B1 S1
Response time for oxygen sensor output to
Idling after warming up: 0 – 1,000 msec.
switch from rich to lean Oxygen Sensor Rich Lean Bank 2 Sensor 1: O2 RL B2 S1
Response time for oxygen sensor output to
Idling after warming up: 0 – 1,000 msec.
switch from rich to lean ∗
: If no conditions are specifically stated for ”ldling”, it means the shift lever is at the N or P position, the A/C switch is OFF and all accessory switches are OFF.
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
DI–14 DIAGNOSTICS –
ENGINE DI12C–20
DIAGNOSTIC TROUBLE CODE CHART HINT: Parameters listed in the chart may not be exactly the same as your reading due to the type of instrument or other factors. If a malfunction code is displayed during the DTC check in the check mode, check the circuit for the codes listed in the table below. For details of each code, refer to the ’’See page’’ under the respective ’’DTC No.’’ in the DTC chart. *1
DTC No.
Detection Item
(See page)
TroubleArea
CHK ENG
Memory
(MIL) P0100
Air Flow Meter Circuit Malfunc-
(DI–26)
tion
P0101
Air Flow Meter Circuit Range/
(DI–30)
PerformanceProblem
P0110
Intake Air Temp. Circuit Malfunc-
(DI–31)
tion
P0115 (DI–36)
Open or short in air flow meter circuit Air flow meter
Engine ECU Air flow meter Open or short in intake air temp. sensor circuit Intake air temp. sensor (built into air flow meter) Engine ECU Open or short in water temp. sensor circuit
Water Temp. Circuit Malfunction
Water temp. sensor Engine ECU
P0120
Throttle Position Sensor Circuit
(DI–40)
Malfunction
Open or short in throttle position sensor circuit Throttle position sensor Engine ECU Open or short in A/F sensor (bank 1, 2 sensor 1) circuit
A/F sensor (bank 1, 2 sensor 1)
P0125
Insufficient Water Temp. for
(DI–44)
Closed Loop Fuel Control
Air induction system Fuel pressure Injector
Gas leakage on exhaust system Engine ECU Air induction system
P0130
Oxygen Sensor Circuit Malfunc-
(DI–49)
tion (Bank 1 Sensor 1)
Fuel pressure Injectorinjection Open or short in heated oxygen sensor circuit Heated oxygen sensor Open or short in oxygen sensor circuit Oxygen sensor
P0133
Oxygen Sensor Circuit Slow Re-
Air induction system
(DI–53)
sponse (Bank 1 Sensor 1)
Fuel pressure Injector Engine ECU
P0135 (DI–56)
Oxygen Sensor Heater Circuit Malfunction (Bank 1 Sensor 1)
Oxygen sensor heater
Open or short in heater circuit of oxygen sensor
Engine ECU
P0136
Oxygen Sensor Circuit Malfunc-
Open or short in oxygen sensor circuit
(DI–58)
tion (Bank 1 Sensor 2)
Oxygen sensor
P0141
Oxygen Sensor Heater Circuit
(DI–56)
Malfunction (Bank 1 Sensor 2)
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
Open or short in heater circuit of oxygen sensor Oxygen sensor heater Engine ECU
DI–15 DIAGNOSTICS –
ENGINE
Air induction system
P0150*2
Oxygen Sensor Circuit Malfunc-
(DI–49)
tion (Bank 2 Sensor 1)
Fuel pressure Injectorinjection
Open or short in heated oxygen sensor circuit Heated oxygen sensor Open or short in oxygen sensor circuit Oxygen sensor
P0153*2
Oxygen Sensor Circuit Slow Re-
Air induction system
(DI–53)
sponse (Bank 2 Sensor 1)
Fuel pressure Injector Engine ECU
P0155*2
Oxygen Sensor Heater Circuit
(DI–56)
Malfunction (Bank 2 Sensor 1)
Open or short in heater circuit of oxygen sensor Oxygen sensor heater Engine ECU Air induction system Injector blockage Air flow meter
P0171
System too Lean (A/F Lean Mal-
Water temp. sensor
(DI–60)
function, Bank 1)
Fuel pressure Open or short in A/F sensor (bank 1 sensor 1) circuit A/F sensor (bank 1 sensor 1) Engine ECU Injector leak, blockage Air flow meter Water temp. sensor
P0172
System too Rich (A/F Rich Mal-
(DI–60)
function, Bank 1)
Ignition system Fuel pressure Open or short in A/F sensor (bank 1 sensor 1) circuit Gas leakage on exhaust system A/F sensor (bank 1 sensor 1) Engine ECU Air induction system Injector blockage Air flow meter
P0174*2
System too Lean (A/F Lean Mal-
Water temp. sensor
(DI–60)
function, Bank 2)
Fuel pressure Open or short in A/F sensor (bank 2 sensor 1) circuit A/F sensor (bank 2 sensor 1) Engine ECU Injector leak, blockage Air flow meter Water temp. sensor
P0175*2
System too Rich (A/F Rich Mal-
(DI–60)
function, Bank 2)
Ignition system Fuel pressure Open or short in A/F sensor (bank 2 sensor 1) circuit Gas leakage on exhaust system A/F sensor (bank 2 sensor 1) Engine ECU
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
DI–16 DIAGNOSTICS –
ENGINE
P0300
Random/MultipleCylinderMisfire
Open or short in engine wire
(DI–64)
Detected
Connectorconnection
P0301 (DI–64) P0302 (DI–64) P0303 (DI–64) P0304
Vacuum hose connection
Cylinder 1 Misfire Detected
Ignition system
Cylinder 2 Misfire Detected
Fuel pressure Air flow meter
Water temp. sensor
Cylinder 3 Misfire Detected
Compressionpressure Valve clearance
Cylinder 4 Misfire Detected
(DI–64)
Valve timing Engine ECU Open or short in knock sensor circuit
P0325
Knock Sensor 1 Circuit Malfunc-
(DI–69)
tion (Bank 1)
P0335
Crankshaft Position Sensor Cir-
Crankshaft position sensor
(DI–73)
cuit Malfunction (NE Signal)
Crank angle sensor plate
Knock sensor (looseness) Engine ECU Open or short in crankshaft position sensor circuit
Engine ECU Open or short in camshaft position sensor circuit
P0340
Camshaft Position Sensor Circuit
Camshaft position sensor
(DI–75)
Malfunction (G Signal)
Intake camshaft Engine ECU
P0420
Catalyst System Efficiency Be-
(DI–77)
low Threshold (Bank 1)
P0443
Evaporative Emission Control
Gas leakage on exhaust system Oxygen sensor Three–way catalytic converter Open or short in VSV circuit for EVAP
(DI–80)
System Purge Control Vent Con- VSV for EVAP trolMalfunction Engine ECU
P0500
Vehicle Speed Sensor Malfunc-
Open or short in vehicle speed sensor circuit
(DI–82)
tion
Vehicle speed sensor
Combinatonmeter
Engine ECU Open or short in ISC valve circuit
P0505 (DI–85)
ISC valve is stick or closed
Idle Control System Malfunction
A/C switch circuit Air induction system Engine ECU Ignition system
P1300 (DI–88)
Open or short in IGF or IGT1 circuit from No. 1 ignition coil
Igniter Circuit Malfunction (No. 1)
with igniter to engine ECU No. 1 ignition coil with igniter Engine ECU Ignition system
P1305 (DI–88)
Open or short in IGF or IGT2 circuit from No. 2 ignition coil
Igniter Circuit Malfunction (No. 2)
with igniter to engine ECU No. 2 ignition coil with igniter Engine ECU Ignition system
P1310 (DI–88)
Open or short in IGF or IGT3 circuit from No. 3 ignition coil
Igniter Circuit Malfunction (No. 3)
with igniter to engine ECU No. 3 ignition coil with igniter Engine ECU
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
DI–17 DIAGNOSTICS –
ENGINE
Ignition system
P1315 (DI–88)
Open or short in IGF or IGT4 circuit from No. 4 ignition coil
Igniter Circuit Malfunction (No. 4)
with igniter to engine ECU
–
No. 4 ignition coil with igniter Engine ECU
P1335 (DI–95)
Crankshaft Position Sensor Circuit Malfunction (During engine running)
Open or short in crankshaft position sensor circuit Crankshaft position sensor Crank angle sensor plate Engine ECU
VVT Sensor/Camshaft Position
Mechanical system (Jumping teeth of timing chain, chain
(DI–96)
Sensor Circuit Range/Performance Problem (Bank 1)
Engine ECU
P1349
VVT System Malfunction (Bank
OCV
(DI–97)
1)
VVT controller assembly
P1346
stretched)
Valve timing
Engine ECU
P1520*3 (DI–100) P1600 (DI–104) P1656 (DI–106) P1780*3 (DI–108)
Open or short in stop light switch signal circuit
Stop Light Switch Signal Circuit
Stop light switch Engine ECU
Engine ECU BATTMalfunction
OCV Circuit Malfunction (Bank 1)
Open in back up power source circuit Engine ECU Open or short in OCV circuit OCV Engine ECU Short in neutral start switch circuit
Neutral Start Switch Malfunction
Neutral start switch Engine ECU
*1: ... CHK ENG (MIL) lights up. – ... CHK ENG (MIL) does not light up. *2: Only for 1ZZ–FE engine vehicle. *3: Only for A/T models.
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
DI–18 DIAGNOSTICS –
ENGINE DI80T–01
PARTS LOCATION 1ZZ–FE Engine
Engine ECU
Water Temp. Sensor
Circuit Opening Relay
VSV for EVAP Combination Meter
Oxygen Sensor (Bank 1 Sensor 1)
DLC3
Ignition Coil with Igniter Oxygen Sensor (Bank 1 Sensor 2)
OCV Injector Crankshaft Position Sensor
Air Flow Meter
Knock Sensor
Three–Way Catalytic Converter
Camshaft Position Sensor Throttle Position Sensor
Engine Room J/B, R/B Idle Speed Control (ISC) Valve Neutral Start Switch Fuel Pump
Charcoal Canister
Oxygen Sensor (Bank 2 Sensor 1)
Engine Room J/B, R/B A/C Magnetic Clutch Relay (Marking: MG CLT)
EFI Main Relay (Marking: EFI)
Starter Relay
A14593
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
DI–19 DIAGNOSTICS –
ENGINE
3ZZ–FE Engine Engine ECU
Circuit Opening Relay
VSV for EVAP
Combination Meter
DLC3
Ignition Coil with Igniter Oxygen Sensor (Bank 1 Sensor 2)
Injector OCV
Air Flow Meter Crankshaft Position Sensor Knock Sensor
Three–Way Catalytic Converter
Camshaft Position Sensor Throttle Position Sensor
Engine Room J/B, R/B
Idle Speed Control (ISC) Valve Oxygen Sensor (Bank 1 Sensor 1) Neutral Start Switch Water Temp. Sensor Engine Room J/B, R/B Fuel Pump
Charcoal Canistar
A/C Magnetic Clutch Relay (Marking: MG CLT)
EFI Main Relay (Marking: EFI)
Starter Relay
A13820
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
DI–20 DIAGNOSTICS –
ENGINE DI80U–01
TERMINALS OF ECU M/T: E18
E19
13 12 11 10 9 8 7 6 5 4 3 2 1 26 25 24 23 22 21 20 19 18 17 16 15 14
8 7
6
5
4
E20
3
2 1
16 15 14 13 12 11 10 9
11 10 9 8
7
6
5
4
3
2 1
22 21 20 19 18 17 16 15 14 13 12
P19559
Symbols(Terminal No.) BATT (E20–1) E1 –(E18–14)
WiringColor B–Y – BR
IGSW (E20–15) – E1 (E18–14)
Condition 14 –9
B–R – BR
+B (E20–12) – E1 (E18–14)
STDVoltage(V)
Always switch IG ON
14 – 9
B–R–B R
VC (E19–1) E2 –(E19–9)
R – BR
VTA (E19–11) – E2 (E19–9)
IG switch ON B–W – BR
4.5 5.5 – IGswitchON,Acceleratorpedalfullyclosed
0.4–1.0
IGswitchON,Acceleratorpedalfullyopen
3.2–4.8
THA (E19–3) – E2 (E19–9)
Y–B – BR
Idling, Intake air temp. 20
THW (E19–4) – E2 (E19–9)
W–G – BR
Idling,Water temp. 80
STA(E20–11)–E1(E18–14)
R–G–BR
#10 (E18–12) – E01 (E18–13)
3.4–0.5 0.2 – 1.0
Shiftleverpositionneutral,IGswitchSTART
W–L – BR
#20 (E18–11) – E01 (E18–13)
C (68F)
switch IG ON
6.0ormore 14 – 9
R – BR
#30 (E18–25) – E01 (E18–13)
R–L – BR
#40 (E18–24) – E01 (E18–13)
R–W – BR
IGT1 (E18–20) – E1 (E18–14)
L–R – BR
IGT2 (E18–21) – E1 (E18–14)
L–W – BR
IGT3 (E18–22) – E1 (E18–14)
B – BR
IGT4 (E18–23) – E1 (E18–14)
B – BR
Pulsegeneration (See page DI–64)
Idling
Pulsegeneration
Idling
(See page DI–88)
switch IGON IGF (E18–3) – E1 (E18–14)
B–W – BR
G2(E19–12)– NE–(E19–13)
L –W
NE+(E19–5)–NE–(E19–13)
B –W
MREL (E20–16) E1 –(E18–14) FC (E20–14) E1 –(E18–14)
B BR –
STP (E20–4) – E1 (E18–14)
Pulsegeneration
Idling
(See page DI–88) Pulsegeneration
Idling
IG switch ON
G–R – BR
5.5 – 4.5
(See page DI–73) 14 – 9
IG switch ON
G–W – BR
14 – 9
Brake pedal is depressed
7.5 14 –
Brake pedal is released OX1A (E19–6) – E1 (E18–14)
OX1B (E19–14) – E1 (E18–14)
W – BR
W–R – BR
OX2A (E18–6) – E1 (E18–14)
B – BR
HT1A (E19–7) – E1 (E18–14)
G – BR
HT1B (E19–15) – E1 (E18–14)
L–R – BR
HT2A (E19–16) – E1 (E18–14)
LG – BR
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
Below 1.5
Maintain engine speed at 2,500 rpm for 1 min. and 30 sec. after
Pulsegeneration
warming up
(See page DI–44)
Maintain engine speed at 2,500 rpm for 3 min. after warming up
Pulsegeneration (See page DI–44)
Maintain engine speed at 2,500 rpm for 1 min. and 30 sec. after
Pulsegeneration
warming up
(See page DI–44)
Idling switch IG ON
Below 3.0 14 – 9
DI–21 DIAGNOSTICS –
KNK1 (E18–18) – E1 (E18–14)
W –BR
TC (E20–6) – E1 (E18–14)
LG–R – BR
W (E20–5)– E1 (E18–14)
switch IG ON
R–W
– OCV– (E18–1)
P – BR
(See page DI–69) 14 – 9
Idling
14
switch IG ON
9
Pulsegeneration (See page DI–97) 14– 9
A/C switch OFF
Below 2.0 V
EVP1 (E18–7) E1 – (E18–14)
B–L BR –
IG switch ON
14 – 9
RSO (E18–15) E1 – (E18–14)
B–Y BR –
IG switch ON
14 – 9
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
– Below 3.0
IGswitchON A/C switch ON
ACT (E20–21) – E1 (E18–14)
Pulsegeneration
Maintain engine speed at 4,000 rpm after warming up
Y–B –B R
OCV+ (E18–2)
ENGINE
DI–22 DIAGNOSTICS –
ENGINE
A/T: E18
9 8
7 6 5
E19
4 3
2
7 6 5 4 3
1
E20
2 1
21 20 19 18 17 16 15 14 13 12 11 10
16 15 14 13 12 11 10 9 8
313 0 29
24 23 22
282 7
26 25 24 23 22
9
21 20 19 18 17
8 7
6 5 4
E21
3 2 1
7
6
5 4 3 2 1
19 18 17 16 15 14 13 12 11 10
15 14 13 12 11 10 9 8
28 27 26 25 24 23
22 21 20 19 18
22 21 20
17 16
A10774
Symbols(Terminal No.) BATT (E21–1) E1 –(E19–17)
WiringColor B–Y – BR
IGSW (E21–8) – E1 (E19–17)
Condition
STDVoltage(V)
Always
14 –9
B–R – BR
+B (E21–16) – E1 (E19–17)
switch IG ON
B–R– BR
VC (E19–2) E2 –(E19–18)
R – BR
VTA (E19–23) – E2 (E19–18)
14 – 9
IG switch ON
B–W – BR
4.5 5.5 – IGswitchON,Acceleratorpedalfullyclosed
0.4–1.0
IGswitchON,Acceleratorpedalfullyopen
3.2–4.8
C (68F)
THA (E19–22) – E2 (E19–18)
Y–B – BR
Idling, Intake air temp. 20
THW (E19–14) – E2 (E19–18)
W–G – BR
Idling, Water temp. 80
STA(E20–11)–E1(E19–17)
R–G–BR
#10 (E18–1) – E01 (E18–21)
0.2 – 1.0
ShiftleverpositionPorN,IGswitchSTART
W–L – BR
#20 (E18–2) – E01 (E18–21)
3.4–0.5
switch IG ON
6.0ormore 14 – 9
R – BR
#30 (E18–3) – E01 (E18–21)
R–L – BR
#40 (E18–4) – E01 (E18–21)
R–W – BR
IGT1 (E18–10) – E1 (E19–17)
L–R – BR
IGT2 (E18–11) – E1 (E19–17)
L–W – BR
IGT3 (E18–12) – E1 (E19–17)
B – BR
IGT4 (E18–13) – E1 (E19–17)
B – BR
Pulsegeneration Idling
(See page DI–64)
Pulsegeneration
Idling
(See page DI–88)
switch IGON IGF (E18–25) – E1 (E19–17)
B–W – BR
G2(E19–15)– NE–(E19–24)
L –W
NE+ (E19–16) – NE– (E19–24)
B –W
MREL (E20–21) E1 –(E19–17) FC (E21–3) E1 –(E19–17)
B BR –
Pulsegeneration
Idling
(See page DI–88) Pulsegeneration
Idling
IG switch ON
G–R – BR
5.5 – 4.5
(See page DI–73) 14 – 9
IG switch ON
14 – 9 Brake pedal is depressed
7.5 14 –
STP (E20–6) – E1 (E19–17)
G–W – BR
OX1A (E19–12) – E1 (E19–17)
W – BR
Maintain engine speed at 2,500 rpm for 90 sec. after warming up
OX1B (E19–20) – E1 (E19–17)
W–R – BR
Maintain engine speed at 2,500 rpm for 3 min. after warming up
OX2A (E19–21) – E1 (E19–17)
B – BR
Maintain engine speed at 2,500 rpm for 90 sec. after warming up
HT1A (E19–3) – E1 (E19–17)
G – BR
HT1B (E19–6) – E1 (E19–17)
L–R – BR
Brake pedal is released
Below 1.5 Pulsegeneration
HT2A (E19–5) – E1 (E19–17) KNK1 (E18–27) – E1 (E19–17)
Idling
LG – BR
switch IG ON
W –BR
Maintain engine speed at 4,000 rpm after warming up
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
(See page DI–44) Pulsegeneration (See page DI–44) Pulsegeneration (See page DI–44) Below 3.0
14 – 9 Pulsegeneration (See page DI–69)
DI–23 DIAGNOSTICS –
TC (E20–5) – E1 (E19–17)
LG–R – BR
W (E21–15)– E1 (E19–17)
Y–B –B R
OCV+ (E18–24)
R–W
– OCV– (E18–23) AC(E21–18) – E1 (E19–17) ACT (E21–12) E1 – (E19–17)
switch IG ON
L–B–BR P BR –
ENGINE 14 – 9
Idling
14
switch IG ON
A/CswitchON A/C switch OFF
9
Pulsegeneration
IGswitchON
(See page DI–97) Below 1.5 14 – 5
EVP1 (E19–4) E1 – (E19–17)
B–L BR –
IG switch ON
14 – 9
RSO (E18–18) E1 – (E19–17)
B–Y BR –
IG switch ON
14 – 9
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
– Below 3.0
DI–24 DIAGNOSTICS –
ENGINE DI1IA–22
PROBLEM SYMPTOMS TABLE When the malfunction is not confirmed in the diagnostic trouble code check and the problem still can not be confirmed in the basic inspection, proceed to this problem symptoms table and troubleshoot according to the numbered order given below. Symptom
Engine does not crank (Does not start)
Suspected Area
ST–4
2. Starter relay
ST–12
3. Body ECU
No initial combustion (Does not start)
No complete combustion (Does not start)
Engine cranks normally (Difficult to start)
Cold engine (Difficult to start)
Hot engine (Difficult to start)
Low engine idle speed (Poor idling)
Rough idling (Poor idling)
Hunting (Poor idling)
Hesitation/Pooracceleration (Poor driveability)
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
–
1. Engine ECU power source circuit
DI–113
2. Ignition coil with igniter 3. Fuel control circuit
DI–88 DI–124
4. Injector circuit
DI–64
1. Ignition coil with igniter
DI–88
2. Fuel control circuit
DI–124
3. Injector circuit
DI–64
1. Starter signal circuit
DI–111
2. Ignition coil with igniter
DI–88
3. Spark plug
IG–1
4. Compression
EM–4
5. Injector circuit
DI–64
6. Fuel control circuit
DI–124
7. ISC valve circuit
DI–85
1. Starter signal circuit
DI–111
2. Injector circuit
DI–64
3. Ignition coil with igniter
DI–88
4. Spark plug
IG–1
5. Fuel control circuit 6. ISC valve circuit
DI–124 DI–85
1. Starter signal circuit
DI–111
2. Injector circuit
DI–64
3. Ignition coil with igniter
DI–88
4. Spark plug 5. Fuel control circuit
High engine idle speed (Poor idling)
See page
1. Starter
IG–1 DI–124
6. ISC valve circuit
DI–85
1. Engine ECU power source circuit
DI–113
2. Back up power source circuit
DI–104
3. ISC valve circuit
DI–85
1. Injector circuit
DI–64
2. Back up power source circuit
DI–104
3. Fuel control circuit
DI–124
4. ISC valve circuit
DI–85
1. ISC valve circuit
DI–85
2. Injector circuit
DI–64
3. Fuel control circuit 4. Ignition coil with igniter
DI–124 DI–88
5. Compression
EM–4
1. Engine ECU power source circuit
DI–113
2. Fuel control circuit
DI–124
3. ISC valve circuit
DI–85
1. Injector circuit
DI–64
2. Ignition coil with igniter
DI–88
3. Fuel control circuit
DI–124
DI–25 DIAGNOSTICS –
ENGINE
1. Ignition coil with igniter Muffler explosion, after fire (Poor driveability)
Surging (Poor driveability)
Engine stall (Soon after starting)
Engine stall (After accelerator pedal depressed)
Engine stall (After accelerator pedal released)
Engine stall (During A/C operation)
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
DI–88
2. Spark plug
IG–1
3. Injector circuit
DI–64
1. Spark plug
IG–1
2. Injector circuit
DI–64
1. Fuel control circuit
DI–124
2. ISC valve circuit
DI–85
1. Injector circuit
DI–64
2. ISC valve circuit
DI–85
3. Engine ECU
DI–113
1. Engine ECU
DI–113
2. ISC valve circuit
DI–85
1. A/C signal circuit (Compressor circuit)
DI–129
2. Engine ECU
DI–113
DI–26 DIAGNOSTICS –
ENGINE DI7GR–05
CIRCUIT INSPECTION D TC
P 0 10 0
Air Flow Meter Circuit Malfunction
CIRCUIT DESCRIPTION The air flow meter uses a platinum hot wire. The hot wire air flow meter consists of a platinum hot wire, thermistor and a control circuit installed in a plastic housing. The hot wire air flow meter works in principle that the hot wire and thermistor located in the intake air bypass of the housing detect any changes in the intake air temperature. The hot wire is maintained at the set temperature by controlling the current flow through the hot wire. This current flow is then measured as the output voltage of the air flow meter. The circuit is constructed so that the platinum hot wire and thermistor can provide a bridge circuit with the power transistor, and controlled so that the potential of A and B remains equal in order to maintain the set temperature. B+
Thermistor
Air Flow Meter Power Transistor
Platinum Hot Wire
A
B
Output Voltage
Intake Air Temp. Sensor
Thermistor Platinum Hot Wire
DTC No.
P0100
A12542
DTC Detection Condition
Trouble Area
Open or short in air flow meter circuit with more than 3 sec.. and engine speed is less than 3,000 rpm
Open or short in air flow meter circuit Air flow meter Engine ECU
HINT: After confirming DTC P0100, use the hand–held tester to confirm the air flow ratio from the CURRENT DATA. Air Flow Value (gm/sec.)
Malfunction Air flow meter power source circuit open
Approx. 0.0 271.0 or more
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
VG circuit open or short EVG circuit open
DI–27 DIAGNOSTICS –
ENGINE
WIRING DIAGRAM
From Terminal 3 of EFI Relay (See page DI–113)
A28 Air Flow Meter
B–R 1
E2G
+B
Engine ECU
V
10*1, 1*2 E19 EVG
V–R
2*1, 11*2 E19 VG
BR
9*1, 18*2 E19 E2
2
VG 3 E2
5
*1: M/T *2: A/T A14231
INSPECTION PROCEDURE HINT: Read freeze frame data using the hand–held tester, as freeze frame data records the engine conditions when the malfunction is detected. When troubleshooting, it is useful for determining whether the vehicle was running or stopped, the engine was warmed up or not, the air–fuel ratio was lean or rich, etc. at the time of the malfunction.
1
Connect ha nd–held te ster, and read value of air flow rate.
PREPARATION: (a) Connect the hand–held tester to the DLC3. (b) Turn the ignition switch ON and push the hand–held tester main switch ON. (c) Start the engine. CHECK: Read the air flow rate on the hand–held tester. RESULT: Type I Air Flow Rate (gm/sec.)
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
Type II
0.0
271.0 or more
Type I
Go to step 2.
Type II
Go to step 5.
DI–28 DIAGNOSTICS –
2
ENGINE
Check voltage of air flow meter power source. PREPARATION: (a) Disconnect the air flow meter connector. (b) Turn the ignition switch ON. CHECK: Measure the voltage between terminal 1 of the air flow meter connector and the body ground. OK: Voltage: 9 – 14 V
ON
1 (+) (–)
A00099
NG
Check for open in harness and connector between EFI main relay (Marking: EFI) and air flow meter (See page IN–20).
OK
3
Check voltage between terminals VG of engine ECU connector and body ground. PREPARATION: (a) Remove the glove compartment (See page FI–58). (b) Start the engine. CHECK: Measure the voltage between terminal VG of the engine ECU connector and the body ground while the engine is idling. OK: Voltage: 0.2 – 4.9 V (P or N position and A/C switch OFF)
START VG
M/T
(–)
A/T
(+)
VG
(+)
(–)
OK
Check and replace engine ECU (See page IN–20).
A11707
NG
4
Check for open and short in harness and connector between air flow meter and engine ECU (See page IN–20).
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
DI–29 DIAGNOSTICS –
NG
ENGINE
Repair or replace harness or connector.
OK
Replace air flow meter.
5
Check continuity between terminal EVG of engine ECU connector and body ground. PREPARATION: Remove the glove compartment (See page FI–58). CHECK: Check the continuity between terminal EVG of the engine ECU connector and the body ground. OK: Continuity (1 Ω or less)
M/T EVG
A/T
EVG
NG
Check and replace engine ECU (See page IN–20).
A11708
OK
6
Check for open in harness and connector between air flow meter and engine ECU (See page IN–20).
NG
OK
Replace air flow meter. 1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
Repair or replace harness or connector.
DI–30 DIAGNOSTICS –
ENGINE DI1LC–12
D TC
P 0 10 1
Air Flow Meter Circuit Range/Performance Problem
CIRCUIT DESCRIPTION Refer to DTC P0100 on page DI–26. DTC No.
DTC Detection Condition
Trouble Area
After engine is warmed up, conditions (a) and (b) continue for more than 10 sec. at engine speed 900 rpm or less: (2 trip detection logic) (a) Throttle valve fully closed P0101
(b) Air flow meter output 2.2 V
Air flow meter
Conditions (a) and (b) continue for more than 10 sec. at engine speed 1,500 rpm or more: (2 trip detection logic) (a) VTA 0.63 V (b) Air flow meter output 1.06 V
INSPECTION PROCEDURE HINT: Read freeze frame data using the hand–held tester, as freeze frame data records the engine conditions when the malfunction is detected. When troubleshooting, it is useful for determining whether the vehicle was running or stopped, the engine was warmed up or not, the air–fuel ratio was lean or rich, etc. at the time of the malfunction.
1
Are there any other codes (besides DTC P0101) being output?
NO
YES
Go to relevant DTC chart (See page DI–14).
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
Replace air flow m eter.
DI–31 DIAGNOSTICS –
ENGINE DI7GU–04
D TC
P0110
Intake Air Temp. Circuit Malfunction
CIRCUIT DESCRIPTION The intake air temperature sensor is built in the air flow meter (See page DI–26) and senses the intake air temperature. A thermistor built in the sensor changes the resistance value according to the intake air temperature.
Fig. 1 30 20
The lower the intake air temperature, the greater the thermistor resistance value, and the higher the intake air temperature, the lower the thermistor resistance value (See Fig. 1). The intake air temperature sensor is connected to the engine ECU (See below). The 5 V power source voltage in the engine ECU is applied to the intake air temperature sensor from terminal THA via resistor R. That is, resistor R and the intake air temperature sensor are connected in series. When the resistance value of the intake air temperature sensor changes in accordance with changes in the intake air temperature, the potential at terminal THA also changes. Based on this signal, the engine ECU increases the fuel injection volume to improve driveability during the cold engine operation.
10
5
Acceptable
Ω 3
k e 2 c n ta 1 s i s 0.5 e R0.3 0.2 0.1
20 – (–4)
0 32
20 68
40 104
60 140
80 176
100 212
temperature C (F) FI4741
DTC No.
P0110
DTC Detection Condition Open or short in intake air temp. sensor circuit for 0.5 sec. or more.
Trouble Area Open or short in intake air temp. sensor circuit Intake air temp. sensor (built in air flow meter) Engine ECU
HINT: After confirming DTC P0110, use the hand–held tester to confirm the intake air temperature from the CURRENT DATA. Temperature Displayed –40C (–40) 140C (284 more or)
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
Malfunction Open circuit Short circuit
DI–32 DIAGNOSTICS –
ENGINE
WIRING DIAGRAM A28 Intake Air Temp. Sensor (Built in Air Flow Meter)
Engine ECU 5V
THA
Y–B 4
3*1,
22*2 E19
THA
R
9*1, 18*2 E2
BR 5
E19 E2
E1
*1: M/T *2: A/T A10940
INSPECTION PROCEDURE HINT: If DTCs P0100, P0110, P0115 and P0120 are output simultaneously, E2 (sensor ground) may be open. Read freeze frame data using the hand–held tester, as freeze frame data records the engine condi tions when the malfunction is detected. When troubleshooting, it is useful for determining whether the vehicle was running or stopped, the engine was warmed up or not, the air–fuel ratio was lean or rich, etc. at the time of the malfunction.
1
Connect hand–held tester, and read value of intake air temperature.
PREPARATION: (a) Connect the hand–held tester to the DLC3. (b) Turn the ignition switch ON and push the hand–held tester main switch ON. CHECK: Read the temperature value on the hand–held tester. OK: Same value as the actual intake air temperature. HINT: If there is open circuit, hand–held tester indicates –40C (–40 F). If there is short circuit, hand–held tester indicates 140 C (284 F) NG
OK
Check for intermittent problems (See page DI–3).
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
–40 C (–40) ... Go to step 2 140C (284) or more ... Go to step 4.
DI–33 DIAGNOSTICS –
2
ENGINE
Check for o pen in harness or engine ECU. ON Engine ECU
Intake Air Temp. Sensor
5V 1 2 4 3* , 22* THA E19
9*1, 18*2 E2 E19
E1
5
PREPARATION: (a) Disconnect the air flow meter connector. (b) Connect the sensor wire harness terminals together. (c) Turn the ignition switch ON. CHECK: Read the temperature value on the hand–held tester. OK: Temperature value: 140°C (284°F) or more
A12237
OK
Confirm good connection at sensor. If OK, replace air flow meter.
NG
3
Check for open in harness or engine ECU connector. PREPARATION: (a) Remove the glove compartment (See page FI–58). (b) Connect between terminals THA and E2 of the engine
ON
Engine ECU
Intake Air Temp. Sensor
3*1, 22*2
4
THA E19 9*1, 18*2 E19E2
5 M/T
A/T
THA
THA
*1: M/T *2: A/T
5V
E1
E2
ECU connector. HINT: The air flow meter connector is disconnected. Before checking, do a visual and contact pressure check for the engine ECU connector (See page IN–20). CHECK: Read the temperature value on the hand–held tester. OK: Temperature value: 140°C (284°F) or more
E2
OK A11709
NG
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
Open in harness between terminals E2 or THA, repair or replace harness.
DI–34 DIAGNOSTICS –
ENGINE
Confirm good connection at engine ECU. If OK, check and replace engine ECU (See page IN–20).
4
Check for short in harness and engine ECU. ON Engine ECU
Intake Air Temp. Sensor 4
3*1, 22*2 E19
9*1, 18*2 E19
5
5V THA
E2 E1
*1: M/T *2: A/T A12238
PREPARATION: (a) Disconnect the air flow meter connector. (b) Turn the ignition switch ON. CHECK: Read the temperature value on the hand–held tester. OK: Temperature value: –40°C (–40°F) OK
Replace air flow m eter.
NG
5
Check for short in harness or engine ECU. ON Intake Air Temp. Sensor
Engine ECU 5V
4
THA
E2 E1
5 M/T
PREPARATION: (a) Remove the glove compartment (See page FI–58). (b) Disconnect the E19 c onnector from the engine ECU (See page FI–58). HINT: The air flow meter connector is disconnected. (c) Turn the ignition switch ON. CHECK: Read the temperature value on the hand–held tester. OK: Temperature value: –40°C (–40°F)
E19 Connector A/T
E19 Connector A11713
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
OK
Repair or replace harness or connector.
DI–35 DIAGNOSTICS –
NG
Check and replace engine ECU (See page IN–20).
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
ENGINE
DI–36 DIAGNOSTICS –
ENGINE DI7GV–04
D TC
P0115
Water Temp. Circuit Malfunction
CIRCUIT DESCRIPTION A thermistor built in the water temperature sensor changes the resistance value according to the water temperature. The structure of the sensor and connection to the engine ECU is the same as in the DTC P0110 shown on page DI–31. DTC No.
DTC Detection Condition
P0115
Trouble Area
Open or short in water temp. sensor circuit for 0.5 sec. or
Open or short in water temp. sensor circuit
condition below continues for 0.5 sec. or more:
Water temp. sensor
THW out put 0.1 (V) or 4.9 (V) THW out put
Engine ECU
HINT: After confirming DTC P0115, use the hand–held tester to confirm the water temperature from the CURRENT DATA. Temperature Displayed
Malfunction
–40C (–40F)
Open circuit
140C (284
Short circuit
WIRING DIAGRAM Engine ECU W2 Water Temp. Sensor
5V 4*1,
THW 2
W–G
BR
E2
14*2 E19
THW
9*1, 18*2 E19
E2
1
E2
*1: M/T *2: A/T
A10940
INSPECTION PROCEDURE HINT: If DTCs P0100, P0110, P0115 and P0120 are output simultaneously, E2 (sensor ground) may be open. Read freeze frame data using the hand–held tester, as freeze frame data records the engine condi tions when the malfunction is detected. When troubleshooting, it is useful for determining whether the vehicle was running or stopped, the engine was warmed up or not, the air–fuel ratio was lean or rich, etc. at the time of the malfunction.
1
Connect han d–held te ster, an d read value of wa ter te mperature.
PREPARATION: (a) Connect the hand–held tester to the DLC3. 1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
DI–37 DIAGNOSTICS –
ENGINE
(b) Turn the ignition switch ON and push the hand–held tester main switch ON. CHECK: Read the temperature value on the hand–held tester. OK: Same value as the actual water temperature. HINT: If there is open circuit, hand–held tester indicates –40C (–40F). If there is short circuit, hand–held tester indicates 140 C (284 F) or more. NG
–40 C (–40F) ... Go to step 2. 140C (284F) or more ... Go to step 4.
OK
Check for intermittent problems (See page DI–3).
2
Check for o pen i n h arness o r e ngine E CU. ON Water Temp.
Engine ECU
Sensor 2
E19
9*1, 18*2 E19
1
5V
4*1, 14*2 THW E2
E1
*1: M/T *2: A/T
PREPARATION: (a) Disconnect the water temperature sensor connector. (b) Connect the sensor wire harness terminals together. (c) Turn the ignition switch ON. CHECK: Read the temperature value on the hand–held tester. OK: Temperature value: 140°C (284°F) or more
A12237
OK
NG
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
Confirm good connection at sensor. If OK, replace water temperature sensor.
DI–38 DIAGNOSTICS –
3
ENGINE
Check for o pen in harness or engine ECU. ON
Water Temp. Sensor
Engine ECU
2
4*1,1 4*2 E19
1
M/T
*1: M/T *2: A/T
THW
E2
THW
A/T
E19 9*1, 18*2
PREPARATION: (a) Remove the glove compartment (See page FI–58). (b) Connect betw een terminals THW and E2 of the engine ECU connector. HINT: The water temperature sensor connector is disconnected. Before checking, do a visual and contact pressure check for the engine ECU connector (See page IN–20). (c) Turn the ignition switch ON. CHECK: Read the temperature value on the hand–held tester. OK: Temperature value: 140°C (284°F) or more
E2
OK
Open in harness between terminals E2 or THW, repair or replace harness.
A11712
NG
Confirm good connection at engine ECU. If OK, check and replace engine ECU (See page IN–20).
4
Check for short in harness and engine ECU.
ON Engine ECU Water Temp. Sensor
5V 4*1, 14*2
2
E19
THW
9*1, 18*2 E2 E19
1
E1
PREPARATION: (a) Disconnect the water temperature sensor connector. (b) Turn the ignition switch ON. CHECK: Read the temperature value on the hand–held tester. OK: Temperature value: –40°C (–40°F)
*1: M/T *2: A/T
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
A12238
OK
Replace water temperature sensor.
DI–39 DIAGNOSTICS –
ENGINE
NG
5
Check for short in harness or engine ECU. ON Engine ECU
Water temp.sensor
PREPARATION: (a) Disconnect the E19 c onnector from the engine ECU (See page FI–58). HINT: The water temperature sensor connector is disconnected. (b) Turn the ignition switch ON. CHECK: Read the temperature value on the hand–held tester. OK: Temperature value: –40°C (–40°F)
E19 Connector
E19 Connector
OK A11713
NG
Check and replace engine ECU (See page IN–20).
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
Repair or replace harness or connector.
DI–40 DIAGNOSTICS –
ENGINE DI7GY–04
D TC
P 0 12 0
Throttle Position Sensor Circuit Malfunction
CIRCUIT DESCRIPTION Throttle Position Sensor
The throttle position sensor is mounted in the throttle body and detects the throttle valve opening angle. When the throttle valve is fully closed, the voltage of approximately 0.4 – 0.8 V is applied to terminal VTA of the engine ECU.
Engine ECU 5V
VC VTA
E2 E1
P24296
DTC No.
P0120
The voltage applied to the terminals VTA of the engine ECU increases in proportion to the opening angle of the throttle valve and becomes approximately 4.4 – 4.8 V when the throttle valve is fully opened. The engine ECU judges the vehicle driving conditions by these signals input in terminal VTA and uses them as one of the conditions for deciding the air–fuel ratio correction, power increase correction and fuel–cut control etc.
DTC Detection Condition
Trouble Area
Open or short in throttle position sensor circuit for 5 sec. or
Open or short in throttle position sensor circuit
condition below continues for 5 sec. or more:
Throttle position sensor
VTA 0.1 V or VTA 4.9 V
Engine ECU
HINT: After confirming DTC P0120, use the hand–held tester to confirm the throttle valve opening percentage and closed throttle position switch condition. Throttle valve opening position expressed as percentage Throttlevalvefullyclosed %
Trouble Area
Throttlevalvefullyopen
0
%
VC circuit open
0
Approx. 100%
VTA circuit open or short
Approx.100%
E2 circuit open
WIRING DIAGRAM T2 Throttle Position Sensor
Engine ECU 5V 1*1, 2*2 VC E19
R
VC 1
VTA
B–W
11*1, 23*2 E19 VTA
BR
9*1, 18*2 E19 E2
3
E2 2
*1: M/T *2: A/T
E1 A12544
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
DI–41 DIAGNOSTICS –
ENGINE
INSPECTION PROCEDURE HINT: If DTCs P0100, P0110, P0115 and P0120 are output simultaneously, E2 (sensor ground) may be open. Read freeze frame data using the hand–held tester, as freeze frame data records the engine condi tions when the malfunction is detected. When troubleshooting, it is useful for determining whether the vehicle was running or stopped, the engine was warmed up or not, the air–fuel ratio was lean or rich, etc. at the time of the malfunction.
1
Connect hand–held tester and read throttle valve opening percentage. PREPARATION: (a) Connect the hand–held tester to the DLC3. (b) Turn the ignition switch ON and push the hand–held tester main switch ON. CHECK: Read the throttle valve opening percentage. OK: Throttle Valve
FI7052
OK
Throttle valve opening position expressed as percentage
Fully open
Approx. 70 %
Fully closed
Approx.10%
Check for intermittent problems (See page DI–3).
NG
2
Check voltage between terminal 1 of wire harness side connector and body ground. PREPARATION: (a) Disconnect the throttle position sensor connector. (b) Turn the ignition switch ON. CHECK: Measure the voltage between terminal 1 of the wire harness side connector and body ground. OK: Voltage: 4.5 – 5.5 V
ON 1 (+) (–)
A05445
NG
OK
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
Go to step 5.
DI–42 DIAGNOSTICS –
3
ENGINE
Check th rottle p osition s ensor (S ee page F I–32).
NG
Replace throttle position sensor.
OK
4
Check voltage between terminals VTA and E2 of engine ECU connector. ON
VTA
(+)
VTA
E2
M/T
(–)
E2
PREPARATION: (a) Remove the glove compartment (See page FI–58). (b) Turn the ignition switch ON. CHECK: Measure the voltage between terminals VTA and E2 of the engine ECU connector. OK:
A/T
Throttle Valve Fully closed Fully open
(+)
(–)
OK
Voltage 0.3 – 1.0 V 2.7 5.2 –V
Check and replace engine ECU (See page IN–20).
A11716
NG
Check for open and short in harness and connector in VTA or E2 circuit between engine ECU and throttle position sensor (See page IN–20).
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
DI–43 DIAGNOSTICS –
5
ENGINE
Check vol tage b etween t erminals V C an d E2 o f en gine E CU c onnector. VC
ON
(+)
VC
E2
(+)
(–)
E2
M/T
(–)
A/T
PREPARATION: (a) Remove the glove compartment (See page FI–58). (b) Turn the ignition switch ON. CHECK: Measure the voltage between terminals VC and E2 of the engine ECU connector. OK: Voltage: 4.5 – 5.5 V
NG
Check and replace engine ECU (See page IN–20).
A11715
OK
Check for open and short in harness and connector in VC circuit between engine ECU and throttle position sensor (See page IN–20).
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
DI–44 DIAGNOSTICS –
ENGINE DI7GZ–04
D TC
P 0 12 5
Insufficient Water Temp. for Closed Loop Fuel Control
CIRCUIT DESCRIPTION To obtain a high purification rate of the CO, HC and NOx components of the exhaust gas, a three–way catalytic converter is used. For the most efficient use of the three–way catalytic converter, the air–fuel ratio must be precisely controlled so that it is always close to the stoichiometric air–fuel ratio. The oxygen sensor (bank 1, 2 sensor 1) is characterized that its output voltage changes suddenly in the vicinity of the stoichiometric air–fuel ratio. This character is used to detect the oxygen concentration in the exhaust gas and provide the engine ECU with feedback to control the air–fuel ratio. When the air–fuel ratio becomes LEAN, the oxygen concentration in the exhaust gas increases and the oxygen sensor informs the engine ECU of the LEAN condition (small electromotive force: < 0.45 V). When the air–fuel ratio is RICHER than the stoichiometric air–fuel ratio, the oxygen concentration in the exhaust gas is reduced and the oxygen sensor informs the engine ECU of the RICH condition (large electromotive force: > 0.45 V). The engine ECU judges by the electromotive force from the oxygen sensor whether the air–fuel ratio is RICH or LEAN and controls the injection time accordingly. However, if malfunction of the oxygen sensor causes output of abnormal electromotive force, the engine ECU is unable to perform accurate air–fuel ratio control. The oxygen sensors include a heater which heats the zirconia element. The heater is controlled by the engine ECU. When the intake air volume is low (the temperature of the exhaust gas is low), current flows to the heater to heat the sensor for accurate oxygen concentration detection. Atmosphere Ideal Air–Fuel Mixture
Housing Platinum Electrode Solid Electrolyte (Zirconia Element)
Platinum Electrode Heater Coating (Ceramic)
Richer – Air–Fuel Ratio – Leaner
Cover
DTC No.
P0125
e g a lt o V t u tp u O
Exhaust Gas
A00798
DTC Detection Condition
Trouble Area
After engine is warmed up, oxygen sensors (bank 1, 2 sensor
Open or short in oxygen sensor (bank 1, 2 sensor 1) circuit
1) does not output RICH (0.45 V) even once when condi-
Oxygen sensor (bank 1, 2 sensor 1)
tions (a), (b), (c) and (d) continue for at least 90 sec.:
Air induction system
(a) Engine speed: 1,400 rpm or more
Fuel pressure
(b) Vehicle speed: 40 – 100 km/h (25 – 62 mph)
Injector
(c) Throttle valve does not fully closed
Gas leakage on exhaust system
(d) 180 sec. or more after starting engine
Engine ECU
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
DI–45 DIAGNOSTICS –
ENGINE
HINT:
WIRING DIAGRAM H17 Oxygen Sensor
Engine ECU
(Bank 1 Sensor 1) B–R 2 BR 4 From Terminal 3 of EFI Main Relay (See page DI–113)
W–B
+B
OX
E1
HT
W
B–R
G
7*1, 3*2 E19 HT1A
B
6*1, 21*2 E19 OX2A
1
2
+B
OX
E1
HT
3
A J39 J/C BR 4
B–R
1
12*2 E19 OX1A
3
H19 Oxygen Sensor (Bank 2 Sensor 1)
A J38 A A J38 J39
6*1,
16*1, 5*2 LG E19 HT2A
H18 Oxygen Sensor2) (Bank Sensor
BR
2 A BR J38
J/C
+B
A BR J39 4 E1
OX
W 3
HT 1
EX
L–R
5 5 IF2 IE2 (LHD)(RHD) 3 3 IF1 IE1 (LHD)(RHD)
14*1, 20*2 W–R E19 OX1B 15*1, 6*2 L–R E19 HT1B *1: M/T *2: A/T A14587
INSPECTION PROCEDURE HINT: If the vehicle runs out of fuel, the air–fuel ratio is LEAN and DTC P0125 is recorded. The CHK ENG (MIL) then comes on. Read freeze frame data using the hand–held tester, as freeze frame data records the engine conditions when the malfunction is detected. When troubleshooting, it is useful for determining whether the vehicle was running or stopped, the engine was warmed up or not, the air–fuel ratio was lean or rich, etc. at the time of the malfunction.
1
Are there any other codes (besides DTC P0125) being output?
YES 1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
Go to relevant DTC chart (See page DI–14).
DI–46 DIAGNOSTICS –
ENGINE
NO
2
Connect hand –held tester, and read value for output voltage of oxygen sensor (bank 1, 2 sensor 1).
PREPARATION: (a) Connect the hand–held tester to the DLC3. (b) Warm up the engine to the normal operating temperature (above 75 C (167F)). CHECK: Read the output voltage of the oxygen sensors when the engine is suddenly raced. HINT: Perform quick racing to 4,000 rpm 3 times using the accelerator pedal. OK: Oxygen sensor output a RICH signal (0.45 V or more) at least once. OK
Go to step 9.
NG
3
Check for open and short in harness and connector between engine ECU and oxygen sensor (bank 1, 2 sensor 1) (See page IN–20).
NG
Repair or replace harness or connector.
OK
4
Check whether misfire has occurred or not by monitoring DTC and data list.
NG
Perform troubleshooting for misfire (See page DI–24).
OK
5
Check air induction system (See page FI–1).
NG 1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
Repair or replace.
DI–47 DIAGNOSTICS –
ENGINE
OK
6
Check fuel pressure (See page FI–7, FI–13).
NG
Check an d r epair fuel pu mp, pr essure regulator, fuel pipe line and filter.
OK
7
Check injector injection (See page FI–22).
NG
Replace i njector.
OK
8
Check gas leakage on exhaust system.
NG
Repair or replace.
OK
Replace oxygen sensor (bank 1, 2 sensor 1).
9
Perform confirmed driving pattern (See page DI–49).
GO
10
Is there D TC P0125 being o utput a gain?
YES
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
Check and replace engine ECU (See page IN–20).
DI–48 DIAGNOSTICS –
ENGINE
NO
11
Did vehicle run out of fuel in past?
NO
YES
DTC P0125 is caused by shortage of fuel.
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
Check for intermittent problems (See page DI–3).
DI–49 DIAGNOSTICS –
ENGINE DI63V–05
D TC
P 0 13 0
Oxygen Sensor Circuit Malfunction (Bank 1 Sensor 1)
D TC
P 0 15 0
Oxygen Sensor Circuit Malfunction (Bank 2 Sensor 1)*
*: Only for 1ZZ–FE engine.
CIRCUIT DESCRIPTION DTC No.
DTC Detection Condition
Trouble Area Open or short in oxygen sensor circuit
P0130 P0150
Output voltage of oxygen sensor remains at 0.4 V or more, or 0.55 V or less, during idling after engine is warmed up (2 trip detection logic)
Oxygen sensor Air induction system Fuel pressure Injector Engine ECU
HINT:
WIRING DIAGRAM
CONFIRMATION DRIVING PATTERN
Vehicle speed 30 km/h 19 mph)
15 sec. or more
15 sec. or more
15 sec. or more
(d)
(d)
(d)
Idling(c)
(e)
(e)
(e)
100 sec. or more
20 sec. or more
20 sec. or more
30 sec.
IG SW OFF (a)(b)
A09299
(a) (b) (c) (d)
Connect the hand–held tester to the DLC3. Switch the hand–held tester from the normal mode to the che ck (test) mode (See page DI–3). Start the engine and let the engine idle for 100 seconds or more. Drive the vehicle at 30 km/h (19 mph) or more for 15 seconds or more.
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
DI–50 DIAGNOSTICS –
ENGINE
(e) Let the engine idle for 20 seconds or more. (f) Let the engine idle for 30 seconds. HINT: If a malfunction exists, the CHK ENG (MIL) is indicated on the combination meter in step (f). NOTICE: If the conditions in this test are not strictly followed, detection of the malfunction is impossible. If you do not have a hand–held tester, turn the ignition switch OFF after performing steps (c) to (f) once, then perform steps (c) to (f) again.
INSPECTION PROCEDURE HINT: Read freeze frame data using the hand–held tester, as freeze frame data records the engine conditions when the malfunction is detected. When troubleshooting, it is useful for determining whether the vehicle was running or stopped, the engine was warmed up or not, the air–fuel ratio was lean or rich, etc. at the time of the malfunction.
1
Are there any other codes (besides DTC P0130 or P0150) being output?
YES
Go to relevant DTC chart (See page DI–14).
NO
2
Check output voltage of oxygen sensor during idling.
PREPARATION: Warm up the oxygen sensor with the engine speed at 2,500 rpm for approx. 90 sec. CHECK: Use the hand–held tester to read the output voltage of the oxygen sensor during idling. OK: Oxygen sensor output voltage: Alternates repeatedly between less than 0.4 V and more than 0.55 V (See the following table). NG
OK
NG
NG
1V 0.55 V 0.4 V 0V A00292
OK
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
Go to step 7.
DI–51 DIAGNOSTICS –
ENGINE
NG
3
Check for open and short in harness and connector between engine ECU and oxygen sensor (See page IN–20).
NG
Repair or replace harness or connector.
OK
4
Check air induction system (See page FI–1).
NG
Repair or replace.
OK
5
Check fuel pressure (See page FI–7, FI–13).
NG
Check an d r epair fuel pu mp, pr essure regulator, fuel pipe line and filter.
OK
6
Check injector injection (See page FI–22).
NG
OK
Replace oxygen sensor.
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
Replace i njector.
DI–52 DIAGNOSTICS –
7
ENGINE
Perform confirmed driving pattern.
Go
8
Is there DTC P0130 or P0150 being output again?
NO
YES
Check and replace engine ECU (See page IN–20).
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
Check for intermittent problems (See page DI–3).
DI–53 DIAGNOSTICS –
ENGINE DI563–07
D TC
P 0 13 3
Oxygen Sensor Circuit Slow Response (Bank 1 Sensor 1)
D TC
P 0 15 3
Oxygen Sensor Circuit Slow Response (Bank 2 Sensor 1)*
*: Only for 1ZZ–FE engine.
CIRCUIT DESCRIPTION Refer to DTC P0125 on page DI–44. DTC No.
DTC Detection Condition
Trouble Area Open or short in oxygen sensor circuit
P0133 P0153
Response time for oxygen sensor’s output voltage to change from rich to lean, or vise–versa, is 1 sec. or more during idling after engine is warmed up (2 trip detection logic)
Oxygen sensor Air induction system Fuel pressure Injector Engine ECU
HINT:
WIRING DIAGRAM Refer to DTC P0125 on page DI–44.
INSPECTION PROCEDURE HINT: Read freeze frame data using the hand–held tester, as freeze frame data records the engine conditions when the malfunction is detected. When troubleshooting, it is useful for determining whether the vehicle was running or stopped, the engine was warmed up or not, the air–fuel ratio was lean or rich, etc. at the time of the malfunction.
1
Are there any other codes (besides DTC P0133 or P0153) being output?
YES
Go to relevant DTC chart (See page DI–14).
NO
2
Check output voltage of oxygen sensor during idling.
PREPARATION: Warm up the oxygen sensor with the engine speed at 2,500 rpm for approx. 90 sec. 1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
DI–54 DIAGNOSTICS –
ENGINE
CHECK: Use the hand–held tester to read the output voltage of the oxygen sensor during idling. OK: Oxygen sensor output voltage: Alternates repeatedly between less than 0.4 V and more than 0.55 V (See the following table).
P18349
OK
Go to step 7.
NG
3
Check for open and short in harness and connector between engine ECU and oxygen sensor (See page IN–20).
NG
Repair or replace harness or connector.
OK
4
Check air induction system (See page FI–1).
NG
Repair or replace.
OK
5
Check fuel pressure (See page FI–7, FI–13).
NG
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
Check an d r epair fuel pu mp, pr essure regulator, fuel pipe line and filter (See page FI–1).
DI–55 DIAGNOSTICS –
ENGINE
OK
6
Check injector injection (See page FI–22).
NG
Replace i njector.
OK
Replace oxygen sensor.
7
Perform confirmation driving pattern (See page DI–49).
GO
8
Is there DTC P0133 or P0153 being output again?
NO
YES
Check and replace engine ECU (See page IN–20).
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
Check for intermittent problems (See page DI–3).
DI–56 DIAGNOSTICS –
ENGINE DI2S8–13
D TC
P 0 13 5
Oxygen Sensor Heater Circuit Malfunction (Bank 1 Sensor 1)
D TC
P 0 14 1
Oxygen Sensor Heater Circuit Malfunction (Bank 1 Sensor 2)
D TC
P 0 15 5
Oxygen Sensor Heater Circuit Malfunction (Bank 2 Sensor 1)*
*: Only for 1ZZ–FE engine.
CIRCUIT DESCRIPTION Refer to DTC P0125 on page DI–44. DTC No.
DTC Detection Condition
Trouble Area
P0135
When heater operates, heater current exceeds 2 A (1ZZ–FE
Open or short in heater circuit of oxygen sensor
P0141
engine, Sensor 1: 3.5A)
Oxygen sensor heater
P0155
Heater current is 0.2 A or less when heater operates
Engine ECU
HINT: Bank 1 refers to bank that includes cylinder No. 1. Bank 2 refers to bank that excludes cylinder No. 1.
WIRING DIAGRAM Refer to DTC P0125 on page DI–44.
INSPECTION PROCEDURE HINT: Read freeze frame data using the hand–held tester, as freeze frame data records the engine conditions when the malfunction is detected. When troubleshooting, it is useful for determining whether the vehicle was running or stopped, the engine was warmed up or not, the air–fuel ratio was lean or rich, etc. at the time of the malfunction.
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
DI–57 DIAGNOSTICS –
1
Check voltage between terminals HT1A, HT1B, HT2A of engine ECU connector and body ground. PREPARATION: (a) Remove the glove compartment (See page FI–58). (b) Turn the ignition switch ON. CHECK: Measure the voltage between terminals HT1A, HT1B, HT2A of the engine ECU connector and the body ground. HINT: Connect terminal HT1A to bank 1 sensor 1. Connect terminal HT2A to bank 2 sensor 1. Connect terminal HT1B to bank 1 sensor 2. OK: Voltage: 9 – 14 V
ON HT1B
HT1A M/T
(+)
A/T
ENGINE
HT1B HT2A
(+)
(–)
HT1A
(–)
OK A14598
Check and replace engine ECU (See page IN–20).
NG
2
Check resistance of oxygen sensor heater (See page FI–56).
NG
Replace o xygen s ensor.
OK
Check and repair harness or connector between EFI main relay (Marking: EFI) and oxygen sensor, and oxygen sensor and engine ECU (See page IN–20).
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
DI–58 DIAGNOSTICS –
ENGINE DI68O–09
D TC
P 0 13 6
Oxygen Sensor Circuit Malfunction (Bank 1 Sensor 2)
CIRCUIT DESCRIPTION Refer to DTC P0125 on page DI–44. DTC No.
DTC Detection Condition
Trouble Area
Output voltage of oxygen sensor remains at 0.4 V or more or 0.5 V or less when vehicle is driven at 40 km/h (25 mph) or P0136
more after engine is warmed up and water temperature is 40C (96 F) or more and engine speed is 1,400rpm or more (2 trip
Open or short in oxygen sensor circuit Oxygen sensor
detection logic)
HINT: Bank 1 refers to bank that includes cylinder No. 1.
WIRING DIAGRAM Refer to DTC P0125 on page DI–44.
CONFIRMATION DRIVING PATTERN
Vehicle speed 30 km/h (19 mph) Idling(c) IG SW OFF (a) (b)
60 sec. or more
Once 40 sec. or more
Twice 40 sec. or more
Nine times 40 sec. or more
(d)
(d)
(d)
(e) 10sec.
(e) 10sec.
(e) 10 sec.
A09300
(a)
Connect the hand–held tester to the DLC3.
(b) Switch the hand–held tester from the normal mode to the che ck (test) mode (See page DI–3). (c) Start the engine and let the engine idle for 60 seconds or more. (d) Drive the vehicle at 30 km/h (19 mph) or more for 40 seconds or more. (e) Let the engine idle for 10 seconds or more. (f) Preform steps (d) to (e) 9 times. NOTICE: If the conditions in this test are not strictly followed, detection of the malfunction is impossible. If you do not have a hand–held tester, turn the ignition switch OFF after performing steps (c) to (f) once, then perform steps (c) to (f) again. 1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
DI–59 DIAGNOSTICS –
ENGINE
INSPECTION PROCEDURE HINT: Read freeze frame data using the hand–held tester,as freeze frame data records the engine conditions when the malfunction is detected. When troubleshooting, it is useful for determining whether the vehicle was running or stopped, the engine was warmed up or not, the air–fuel ratio was lean or rich, etc. at the time of the malfunction.
1
Are there any other codes (besides DTC P0136) being output?
YES
Go to relevant DTC chart (See page DI–14).
NO
2
Check for open and short in harness and connector between engine ECU and oxygen sensor (See page IN–20).
NG
Repair or replace harness or connector.
OK
3
Check output voltage of oxygen sensor.
PREPARATION: (a) Connect the hand–held tester to the DLC3. (b) After warming up the engine, race the engine at 2,500 rpm for 3 min. CHECK: Read the output voltage of the oxygen sensor when the engine is suddenly raced. HINT: Perform quick racing to 4,000 rpm for 3 min. by using the accelerator pedal. OK: Oxygen sensor output voltage: Alternates from 0.4 V or less to 0.5 V or more. OK
NG
Replace oxygen sensor.
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
Ch eck that each connector is properly connected.
DI–60 DIAGNOSTICS –
ENGINE DI6TT–06
D TC
P 0 17 1
System too Lean (A/F Lean Malfunction, Bank 1)
D TC
P 0 17 2
System too Rich (A/F Rich Malfunction, Bank 1)
D TC
P 0 17 4
System too Lean (A/F Lean Malfunction, Bank 2)*
D TC
P 0 17 5
System too Rich (A/F Rich Malfunction, Bank 2)*
*: Only for 1ZZ–FE engine.
CIRCUIT DESCRIPTION Fuel trim isa related to the feedback compensation value, not to the basic injection time. Fuel trim includes short–term fuel trim and long–term fuel trim. Short–term fuel trim is the short–term fuel compensation used to maintain the air–fuel ratio at its ideal theoretical value. The signal from the oxygen sensor indicates whether the air–fuel ratio is RICH or LEAN compared to the ideal theoretical value, triggering a reduction in fuel volume if the air–fuel ratio is rich, and an increase in fuel volume if it is lean. Long–term fuel trim is overall fuel compensation carried out in long–term to compensate for continual deviation of the short–term fuel trim. It forms the central value by the individual engine differences and worn out by overtime and changes in the use of environment. If both the short–term fuel trim and long–term fuel trim are LEAN or RICH beyond a certain value, it is detected as a malfunction and the CHK ENG (MIL) lights on the combination meter. DTC No.
P0171 P0174
DTC Detection Condition When air–fuel ratio feedback is stable after warming up engine, fuel trim is considerably in error on RICH side (2 trip detection logic)
Trouble Area Air induction system Injector blockage Air flow meter Water temp. sensor Fuel pressure
P0172 P0175
When air–fuel ratio feedback is stable after warming up engine, fuel trim is considerably in error on LEAN side (2 trip detection logic)
Gas leakage on exhaust system Open or short in oxygen sensor (bank 1, 2 sensor 1) circuit Oxygen sensor (bank 1, 2 sensor 1) Engine ECU
HINT: When the DTC P0171 or P0174 is recorded, the actual air–fuel ratio is on the LEAN side. When DTC P0172 or P0175 is recorded, the actual air–fuel ratio is on the RICH side. If the vehicle runs out of fuel, the air–fuel ratio is lean and DTC P0171 and P0174 are recorded. The CHK ENG (MIL) then comes on. If the total of the short–term fuel trim value and long–term fuel trim value is within 38 %, the system is functioning normally. 1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
DI–61 DIAGNOSTICS –
ENGINE
The oxygen sensor (bank 1, 2 sensor 1) output voltage and the short–term fuel trim value can be read by using the hand–held tester.
WIRING DIAGRAM Refer to DTC P0125 on page DI–44.
INSPECTION PROCEDURE HINT: Read freeze frame data using the hand–held tester, as freeze frame data records the engine conditions when the malfunction is detected. When troubleshooting, it is useful for determining whether the vehicle was running or stopped, the engine was warmed up or not, the air–fuel ratio was lean or rich, etc. at the time of the malfunction.
1
Check air induction system (See page FI–1).
NG
Repair or replace.
OK
2
Check injector injection (See page FI–22).
NG
Replace i njector.
OK
3
Check air flow meter (See page FI–30) and water temperature sensor (See page FI–50).
NG
Repair or replace.
OK
4
Check for spark and ignition (See page IG–1).
NG
OK 1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
Repair or replace.
DI–62 DIAGNOSTICS –
5
ENGINE
Check fuel pressure (See page FI–7, FI–13).
NG
Check an d r epair fuel pu mp, pr essure regulator, fuel pipe line and filter.
OK
6
Check gas leakage on exhaust system (Seepage EC–8).
NG
Repair or replace.
OK
7
Check output voltage of oxygen sensor (bank 1, 2 sensor 1) during idling.
PREPARATION: Warm up the oxygen sensor with the engine speed at 2,500 rpm for approx. 90 sec. CHECK: Use the hand–held tester to read the output voltage of the oxygen sensor during idling. OK: Oxygen sensor output voltage: Alternates repeatedly between less than 0.4 V and more than 0.55 V (See the following table). NG
OK
NG
NG
1V 0.55 V 0.4 V 0V A00292
OK
NG
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
Go to step 9.
DI–63 DIAGNOSTICS –
8
ENGINE
Check for open and short in harness and connector between engine ECU and oxygen sensor (bank 1, 2 sensor 1) (See page IN–20).
NG
Perform co nfirmation driving pattern (See page DI–49).
OK
Replace oxygen sensor.
9
Perform confirmation driving pattern (See page DI–49).
Go
10
Is there D TC P0171, P0 172, P 0174 or P0 175 being output again?
YES
Check and replace engine ECU (See page IN–20).
NO
11
Did vehicle run out of fuel in past?
NO
YES
DTC P0171, P0172, P0174 or P0175 is caused by shortage of fuel.
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
Check for intermittent problems (See page DI–24).
DI–64 DIAGNOSTICS –
ENGINE DI7H0–05
D TC
P 0 30 0
Random/Multiple Cylinder Misfire Detected
D TC
P 0 30 1
Cylinder 1 Misfire Detected
D TC
P 0 30 2
Cylinder 2 Misfire Detected
D TC
P 0 30 3
Cylinder 3 Misfire Detected
D TC
P 0 30 4
Cylinder 4 Misfire Detected
CIRCUIT DESCRIPTION Misfire: The engine ECU uses the crankshaft position sensor and camshaft position sensor to monitor changes in the crankshaft rotation for each cylinder. The engine ECU counts the number of times the engine speed change rate, indicating that misfire has occurred. And when the misfire rate lights equalsup. to or exceeds the count indicating that the engine condition has deteriorated, the CHK ENG (MIL) If the misfire rate is high enough and the driving conditions causes the catalyst to overheat, the CHK ENG (MIL) blinks when the misfire occurs. DTC No.
P0300
DTC Detection Condition
Trouble Area
Misfire of random cylinders is detected during any particular
Open or short in engine wire
200 or 1,000 revolutions
Connectorconnection
1 trip detection logic: CHK ENG to brink
Vaccum hose connection
2 trip detection logic: CHK ENG to light up
Ignition system Injector
P0301 P0302 P0303 P0304
For any particular 200 revolutions of engine, misfire is detected
Fuel pressure
which can cause catalyst to overheat
Air flow meter
(This causes CHK ENG to blink)
Water temp. sensor Compressionpressure
For any particular 1,000 revolutions of engine, misfire is de-
Valve clearance
tected which causes a deterioration in emissions
Valve timing
(2 trip detection logic)
Engine ECU
HINT: When codes of the misfire cylinder are recorded repeatedly but no random misfire code is recorded, it is indicated that the misfires were detected and recorded at different times.
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
DI–65 DIAGNOSTICS –
ENGINE
WIRING DIAGRAM Engine ECU
I7 Injector No. 1
4 4 B IF1 IE1 (LHD)(RHD)
B 2
B
11*1, 2*2 E18 #20
R–L
25*1, 3*2 E18 #30
R–W
24*1, 4*2 E18 #40
2 1 I9 Injector No. 3
B B From Terminal 1 of Ignition SW (See page DI–113)
R
1
I8 Injector No. 2
B B
W–L
12*1, 1*2 E18 #10
2
1
I10 Injector No. 4 B 2
1
*1: M/T *2: A/T A14584
CONFIRMATION DRIVING PATTERN (a) (b)
Connect the hand–held tester to the DLC3. Record the DTC and the freeze frame data.
(c) (d)
Use the hand–held tester to set to the check (test) mode (See page DI–3). Drive the vehicle several times with the engine speed, load and its surrounding range shown with ENGINE SPD, CALC LOAD in the freeze frame data or MISFIRE RPM, MISFIRE LOAD in the data list. If you have no hand–held tester, turn the ignition switch OFF after the symptom is simulated for the first time. Then repeat the simulation process again. HINT: In order to memorize the DTC of the misfire, it is necessary to drive around MISFIRE RPM, MISFIRE LOAD in the following data list. Engine Speed
Time
Idling
5 minutes and 45 seconds or more
1,000 rpm
minutes 4 more or
2,000 rpm
2minutesand30secondsormore
3,000 rpm
1minute and20 seconds or more
(e)
Check whether there is misfire or not by monitoring DTC and the freeze frame data, and then record
(f)
them. Turn the ignition switch OFF and wait at least 5 seconds.
INSPECTION PROCEDURE HINT: If the other DTCs besides misfire is memorized simultaneously, first perform the troubleshooting for them.
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
DI–66 DIAGNOSTICS –
ENGINE
Read freeze frame data using the hand–held tester, as freeze frame data records the engine conditions when the malfunction is detected. When troubleshooting, it is useful for determining whether the vehicle was running or stopped, the engine was warmed up or not, the air–fuel ratio was lean or rich, etc. at the time of the malfunction. If the misfire does not occured when the vehicle is brought to the workshop, misfire can be confirmed by reproducing the condition of the freeze frame data. Also, after finishing the repair, confirm that there is no misfire (See confirmation driving pattern). When either of SHORT FT #1, LONG FT #1, SHORT FT #2 or LONG FT #2 in the freeze frame data is out of the range of 20 %, there is a possibility that the air–fuel ratio is inclining either to RICH (–20 % or less) or LEAN (+20 % or more). When WATER TEMP in the freeze frame data is less than 80C (176F), there is a possibility of misfire only during warming up. In the case that the misfire cannot be reproduced, this may be because of the driving with the shortage of fuel, the use of improper fuel, a stain of the ignition plug and etc.
1
Check w ire harness and c onnector i n e ngine room.
CHECK: Check the connection conditions of the wire harness and connector. NG
Repair o r replace, then confirm that there is no misfire (See confirmation driving pattern).
OK
2
Check sp ark plug and spark o f misfire cylinder (S ee page FI–22).
NG
OK
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
Replace or check ignition system (See page IG–1).
DI–67 DIAGNOSTICS –
3
Check voltage of engine ECU terminals for injector of faulty cylinder. PREPARATION: (a) Remove the glove compartment (See page FI–58). (b) Turn the ignition switch ON. CHECK: Measure the voltage between appli cable terminals #10 – #40 of the engine ECU connector and body ground. OK: Voltage: 9 – 14 V
ON #20 M/T #10
#30
#40 (+)
A/T
ENGINE
#40 #30
(–)
#20 #10
(+)
(–)
A11717
Reference: INSPECTION USING OSCILLOSCOPE With the engine idling, check the waveform between terminals #10 – #40 and E01 of the engine ECU connector. HINT: The correct waveform is as shown. Injector Signal Waveform 20 V/ Division
20 V/ Division
GND
GND
(Magnification)
50 msec./Division (Idling)
1 msec./Division (Idling) Injection duration
OK
NG
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
Go to step 5.
A12490
DI–68 DIAGNOSTICS –
4
ENGINE
Check res istance of i njector of m isfire c ylinder (S ee page FI–22).
NG
Replace i njector.
OK
Check for open and short in harness and connector between injector and engine ECU (See page IN–20).
5
Check fuel pressure (See page FI–7, FI–13).
NG
Check an d r epair fuel pu mp, pr essure regulator, fuel pipe line and filter (See page FI–1).
OK
6
Check injector injection (See page FI–22).
NG
Replace i njector.
OK
7
Check air flow meter (See page FI–30) and water temperature sensor (See page FI–50).
NG OK
Check compression pressure (See page EM–4) and valve clearance (See page EM–5). 1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
Repair or replace.
DI–69 DIAGNOSTICS –
ENGINE DI80K–01
D TC
P 0 32 5
Knock Sensor 1 Circuit Malfunction (Bank 1)
CIRCUIT DESCRIPTION The knock sensor is fitted behind the cylinder block to detect the engine knocking. This sensor contains a piezoelectric element which generates a voltage when it becomes deformed. This occurs when the cylinder block vibrates due to knocking. If the engine knocking occurs, ignition timing is delyed to suppress it. DTC No.
P0325
DTC Detection Condition
Trouble Area
No knock sensor 1 signal to engine ECU with engine speed between 2,000 rpm and 6,000 rpm for 10 sec. or more
Open or short in knock sensor circuit Knock sensor (looseness) Engine ECU
WIRING DIAGRAM Engine ECU K1 Knock Sensor B 1
1 EJ1
W
18*1, 27*2 KNK1 E18 *1: M/T *2: A/T
E2
A11751
INSPECTION PROCEDURE HINT: Read freeze frame data using the hand–held tester, as freeze frame data records the engine conditions when the malfunction is detected. When troubleshooting, it is useful for determining whether the vehicle was running or stopped, the engine was warmed up or not, the air–fuel ratio was lean or rich, etc. at the time of the malfunction.
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
DI–70 DIAGNOSTICS –
1
ENGINE
Check continuity between terminal KNK1 of engine ECU connector and body ground. PREPARATION: (a) Remove the glove compartment (See page FI–58). (b) Disconnect the E18 connector from the engine ECU. CHECK: Measure the resistance between terminal KNK1 of the engine ECU connector and body ground. OK: Resistance: 1 MΩ or higher
M/T
KNK1 E18 Connector A/T E18 Connector
KNK1
A11720
Reference: INSPECTION USING OSCILLOSCOPE FOR 1ZZ–FE ENGINE With the engine racing at 4,000 rpm, check the waveform between terminal KNK1 of the engine ECU connector and body ground. HINT: The correct waveform is as shown in the illustration.
KNK Signal Waveform 0.5V/Division
0V
5 msec./Division 0.5V/Division
Spread the time on the horizontal axis, and confirm that the period of the wave is 0.08 msec. (Normal mode vibration frequency of knock sensor: 12.5 kHz) HINT: If the vibration frequency in the normal mode is not 12.5 kHz, the sensor is out of order.
0V
0.05 msec./Division A00406
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
DI–71 DIAGNOSTICS –
ENGINE
Reference: INSPECTION USING OSCILLOSCOPE FOR 3ZZ–FE ENGINE With the engine racing at 4,000 rpm, check the waveform between terminal KNK1 of the engine ECU connector and body ground. HINT: The correct waveform is as shown in the illustration.
KNK Signal Waveform 0.5V/Division
0V
5 msec./Division 0.5V/Division
Spread the time on the horizontal axis, and confirm that the period of the wave is 0.14 msec. (Normal mode vibration frequency of knock sensor: 7.1 kHz) HINT: If normal mode vibration frequency is not 7.1 kHz, the sensor is malfunctioning.
0V
0.1 msec./Division A00406
OK
Go to step 3.
NG
2
Check knock sensor ( See page FI–53).
NG
Replace knock sensor.
OK
3
Check for open and short in harness and connector between engine ECU and knock sensor (See page IN–20).
NG
OK
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
Repair or replace harness or connector.
DI–72 DIAGNOSTICS –
4
ENGINE
Is m alfunction de tected a gain w hen a go od knock s ensor is in stalled?
YES
NO
Check and replace engine ECU (See page IN–20).
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
Replace k nock sensor.
DI–73 DIAGNOSTICS –
ENGINE DI4EB–12
D TC
P 0 33 5
Crankshaft Position Sensor Circuit Malfunction (NE Signal)
CIRCUIT DESCRIPTION The crankshaft position sensor detects the engine speed and crankshaft angle signal (NE signal). It is installed on the timing chain cover. The NE signal plate (crank angle sensor plate) has 34 teeth. The NE signal sensor generates 34 signals of every engine revolution. The engine ECU detects the standard crankshaft angle based on the G signal, the actual crankshaft angle and the engine speed by the NE signal. DTC No.
DTC Detection Condition
Trouble Area
No crankshaft position sensor signal to engine ECU during
Open or short in crankshaft position sensor circuit
cranking for 4.7 sec. or more (2 trip detection logic)
Crankshaft position sensor
No crankshaft position sensor signal to engine ECU with en-
Crank angle sensor plate
gine speed 600 rpm or more (2 trip detection logic)
Engine ECU
P0335
WIRING DIAGRAM Engine ECU
C1 Camshaft Position Sensor L 1
12*1, 15*2 E19
G2
5*1, 16*2 E19
NE+
13*1, 24*2 E19
NE–
B–W Signal Rotor on 2 Intake Camshaft C3 Crankshaft Position Sensor B 1 W Crank Angle Sensor Plate
2
W
*1: M/T *2: A/T A12484
INSPECTION PROCEDURE HINT: Perform troubleshooting of DTC P0335 first. If no trouble is found, troubleshoot the following mechani cal systems. Read freeze frame data using the hand–held tester, as freeze frame data records the engine condi tions when the malfunction is detected. When troubleshooting, it is useful for determining whether the vehicle was running or stopped, the engine was warmed up or not, the air–fuel ratio was lean or rich, etc. at the time of the malfunction.
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
DI–74 DIAGNOSTICS –
1
ENGINE
Check res istance of c rankshaft po sition s ensor (Se e pa ge IG–1). G and NE Signal Waveforms 5V /Division
G
NE
Reference: INSPECTION USING OSCILLOSCOPE During cranking or idling, check the waveforms between terminals G2 and NE–, and NE+ and NE– of the engine ECU connector. HINT: The correct waveforms are as shown in the illustration. NG
50 msec./Division (Idling)
Replace c rankshaft p osition s ensor.
A14583
OK
2
Check for open and short in harness and connector between engine ECU and crankshaft position sensor (See page IN–20).
NG
Repair or replace harness or connector.
OK
3
Inspect sensor installation and signal plate teeth of crank angle sensor plate.
NG
OK
Check and replace engine ECU (See page IN–20).
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
Tighten sensor securely. Replace crank angle sensor plate.
DI–75 DIAGNOSTICS –
ENGINE DI6TU–07
D TC
P 0 34 0
Camshaft Position Sensor Circuit Malfunction (G Signal)
CIRCUIT DESCRIPTION Camshaft position sensor (G signal) consists of a magnet, an iron core and pickup coil. The G signal rotor has 3 teeth. It is installed on the intake camshaft. When the camshafts rotates, the protrusion on the signal rotor and the air gap on the pickup coil change. It causes fluctuations in the magnetic field and generates an electromotive force in the pickup coil. DTC No.
DTC Detection Condition
Trouble Area
No camshaft position sensor signal to engine ECU during
Open or short in camshaft position sensor circuit
cranking for 5 sec. or more (2 trip detection logic)
Camshaft position sensor
No camshaft position sensor signal to engine ECU with engine
Intake camshaft
speed 600 rpm or more
Engine ECU
P0340
WIRING DIAGRAM Refer to DTC P0335 on page DI–73.
INSPECTION PROCEDURE HINT: Read freeze frame data using the hand–held tester,as freeze frame data records the engine conditions when the malfunction is detected. When troubleshooting, it is useful for determining whether the vehicle was running or stopped, the engine was warmed up or not, the air–fuel ratio was lean or rich, etc. at the time of the malfunction.
1
Check re sistance of camshaft p osition sensor (See page IG–1).
Reference: INSPECTION USING OSCILLOSCOPE Refer to DTC P0335 on page DI–73. NG
Replace camshaft position sensor.
OK
2
Check for open and short in harness and connector between engine ECU and camshaft position sensor (See page IN–20). NG
OK
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
Repair or replace harness or connector.
DI–76 DIAGNOSTICS –
3
ENGINE
Inspect sensor installation and signal rotor teeth of intake camshaft.
NG
OK
Check and replace engine ECU (See page IN–20).
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
Tighten sensor scurely. Replace intake camshaft.
DI–77 DIAGNOSTICS –
ENGINE DI1EE–14
D TC
P 0 42 0
Catalyst System Efficiency Below Threshold (Bank 1)
CIRCUIT DESCRIPTION The engine ECU compares the waveform of the oxygen sensor located in front of the catalyst with the waveform of the oxygen sensor located behind the catalyst to determine whether or not the catalyst performance has deteriorated. Air–fuel ratio feedback compensation keeps the waveform of the oxygen sensor repeatedly changing back and forth from rich to lean. If the catalyst is functioning normally, the waveform of the oxygen sensor switches back and forth between rich and lean much more slowly than the waveform of the oxygen sensor. But when both waveforms change at a similar rate, it indicates that the catalyst performance has deteriorated. Waveform of Oxygen Sensor
Normal Catalyst
Waveform of Oxygen Sensor
FI7081
DTC No.
P0420
DTC Detection Condition
Trouble Area
After engine and catalyst are warmed up while vehicle is driven
Gas leakage on exhaust system
within set vehicle and engine speed range, waveform of A/F
Open or short in A/f sensor and oxygen sensor circuit
sensor and oxygen sensor have same amplitude (2 trip detec-
Oxygen sensor
tion logic)
Three–way catalytic converter
CONFIRMATION ENGINE RACING PATTERN Engine Speed (c)
2,500 – 3,000 rpm
Idling IG SW OFF
(d)
(b) (a) Warmedup
3min.orso
Check
Time FI7132
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
DI–78 DIAGNOSTICS –
ENGINE
(a)
Connect the hand–held tester to the DLC3, or connect the probe of the oscilloscope between terminals OX1A and E1, OX1B and E1, and OX2A and E1 of the engine ECU connectors. (b) Start the engine and warm it up with all the accessories switched OFF until the engine coolant temperature is stable. (c) Race the engine at 2,500 – 3,000 rpm for about 3 min. (d) After confirming that the waveform of the oxygen sensor (bank 1, 2 sensor 1 (OX1A, OX2A)), oscillate around 0.5 V during feedback to the engine ECU, check the waveform of the oxygen sensor (bank 1 sensor 2 (OX1B)). HINT: OX Signal Waveform (Oscilloscope) If there is a malfunction in this system, the waveform of the oxy1.0 V gen sensor (bank 1 sensor 2 (OX1B)) is almost the same as that of the oxygen sensor (bank 1, 2 sensor 1 (OX1A, OX2A)) on the left.There are some cases when the CHK ENG (MIL) may either light up or not, even through a malfunction exists. 0V
200 msec./Division
FI6514
INSPECTION PROCEDURE HINT: Read freeze frame data using the hand–held tester, as freeze frame data records the engine conditions when the malfunction is detected. When troubleshooting, it is useful for determining whether the vehicle was running or stopped, the engine was warmed up or not, the air–fuel ratio was lean or rich, etc. at the time of the malfunction.
1
Are there any other codes (besides P0420) being output?
YES
Go to relevant DTC chart (See page DI–14).
NO
2
Check gas leakage on exhaust system.
NG
Repair or replace.
OK
3
Check oxygen sensor (bank 1, 2 sensor 1) (See page FI–56).
NG 1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
Repair or replace.
DI–79 DIAGNOSTICS –
ENGINE
OK
4
Check oxygen sensor (bank 1 sensor 2) (See page FI–56).
NG
OK
Replace three–way catalytic converter.
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
Repair or replace.
DI–80 DIAGNOSTICS –
ENGINE DI7H1–03
D TC
P 0 44 3
Evaporative Emission Control System Purge Control Vent Control Malfunction
CIRCUIT DESCRIPTION To reduce HC emissions, evaporated fuel from the fuel tank goes through the charcoal canister to the intake manifold for combustion in the cylinders. The engine ECU changes the duty signal to the VSV for the EVAP so that the intake quantity of HC emissions becomes appropriate for the driving conditions (engine load, engine speed, vehicle speed, etc.) after the engine is wamed up. DTC No.
DTC Detection Condition
Trouble Area Open or short in VSV circuit for EVAP
P0443
Proper response to engine ECU command does not occur
VSV for EVAP Engine ECU
WIRING DIAGRAM Engine ECU
From Terminal 3 of EFI Relay (See page DI–113)
V11 VSV for EVAP B–R
B–L 2
7*1 4*2 E18 E19 EVP1
1
*1: M/T *2: A/T
A12064
INSPECTION PROCEDURE HINT: Read freeze frame data using the hand–held tester, as freeze frame data records the engine conditions when the malfunction is detected. When troubleshooting, it is useful for determining whether the vehicle was running or stopped, the engine was warmed up or not, the air–fuel ratio was lean or rich, etc. at the time of the malfunction.
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
DI–81 DIAGNOSTICS –
1
ENGINE
Check operation of VSV for EVAP.
ON
E F
E F
VSV is ON
VSV is OFF A14233
PREPARATION: (a) Connect the hand–held tester to the DLC3. (b) Turn the ignition switch ON and push the hand–held tester main switch ON. (c) Select the A CTIVE TEST mode on the h and–held tester. CHECK: Check the operation of the VSV when the VSV is operated by the hand–held tester. OK: VSV is ON: Air from port E flows out through port F. VSV is OFF: Air from port E flows out through port F with a little difficult. OK
Check for intermittent problems (See page DI–3).
NG
2
Check VSV for EVAP (See page FI–48).
NG
Replace VSV for EVAP.
OK
3
Check for open and short in harness and connector between EFI main relay (Marking: EFI) and engine ECU (See page IN–20).
NG
OK
Check and replace engine ECU (See page IN–20).
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
Repair or replace harness or connector.
DI–82 DIAGNOSTICS –
ENGINE DI4ED–11
D TC
P 0 50 0
Vehicle Speed Sensor Malfunction
CIRCUIT DESCRIPTION The speed sensor for ABS detects the wheel speed and sends the appropriate signals to the ABS ECU. The ECU converts these signals into a 4–pulse signal and outputs it to the combination meter. After this signal is converted into a more precise rectangular waveform by the waveform shaping circuit inside the combination meter, it is then transmitted to the engine ECU. The engine ECU determines the vehicle speed based on the frequency of these pulse signals. 4–pulse
4–pulse
From Vehicle Speed Sensor
Engine ECU
ABS ECU
Combination Meter
A00022
DTC No.
DTC Detection Condition
Trouble Area
For M/T vehicles, no vehicle speed sensor signal to engine ECU under following condition (2 trip detection logic) (a) Water temp. 70C (158F)
P0500
(b) Engine speed is more than 2,000 rpm and less than 5,000 rpm (2 trip detection logic)
Combinationmeter
For A/T vehicles, no vehicle speed sensor signal to engine
Open or short in vehicle speed sensor circuit
ECU under following condition (2 trip detection logic)
Speed sensor
(a) Neutral position switch OFF
Engine ECU
(b) Vehicle is being driven Any of following conditions: Engine speed more than 1,900 rpm with throttle position angle
13 or less
WIRING DIAGRAM Combination Meter
Engine ECU
J44 18 C10
J/C
G D
G D
9*1, 22*2 SPD E20
*1: M/T *2: A/T
A14619
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
DI–83 DIAGNOSTICS –
ENGINE
INSPECTION PROCEDURE HINT: Read freeze frame data using the hand–held tester, as freeze frame data records the engine conditions when the malfunction is detected. When troubleshooting, it is useful for determining whether the vehicle was running or stopped, the engine was warmed up or not, the air–fuel ratio was lean or rich, etc. at the time of the malfunction.
1
Connect hand–held tester and read value of vehicle speed.
PREPARATION: (a) Connect the hand–held tester to the DLC3. (b) Start the engine and push the hand–held tester main switch ON. CHECK: Drive the vehicle and read the value of the vehicle speed. OK: Vehicle speed matches the value displayed in the tester. HINT: The vehicle speed sensor is operating normally if the speedometer display is normal. NG
Check s peedometer c ircuit.
OK
2
Check voltage between terminal SPD of engine ECU connector and body ground. PREPARATION: (a) Remove the glove compartment (See page FI–58). (b) Shift the shift lever to the N or n eutral position. (c) Jack up the behicle. (d) Turn the ignition switch ON. CHECK: Measure the voltage between terminal SPD of the engine ECU connector and body ground by turning the wheel slowly. OK: Voltage is generated imtermittently.
ON SPD
(–)
(+)
SPD 5V
(–)
(+) A14622
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
0
Turn Wheel AT7809
DI–84 DIAGNOSTICS –
NG
OK
Check and replace engine ECU (See page IN–20).
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
ENGINE
Check for open in harness and connector between combination meter and engine ECU (See page IN–20).
DI–85 DIAGNOSTICS –
ENGINE DI7H2–04
D TC
P 0 50 5
Idle Control System Malfunction
CIRCUIT DESCRIPTION Throttle Valve
The rotary of solenoid type ISC valve is located in front of the intake air chamber and intake air bypassing the throttle valve goes to the ISC valve through a passage. In this way, the intake air volume bypassing the throttle valve is
Intake Air Chamber
From Air Cleaner
regulated and it controls controlling the engine speed. The engine ECU operates only the ISC valve to perform idle–up and provide the target idling speed for feed back operation.
Valve Signal Engine ECU
ISC Valve To Cylinders P01559
DTC No.
DTC Detection Condition
Trouble Area Open or short in ISC valve circuit ISC valve is stuck or closed
P0505
Open or short in ISC valve circuit
A/C signal circuit Air induction system Engine ECU
WIRING DIAGRAM From Terminal 3 of EFI Relay (See page DI–113)
A J39
I12 ISC Valve
J/C
A J38
B–R 2
DUTY
+B
GND
Engine ECU 15*1, 18*2 E18 RSO
B–Y 1
BR
*1: M/T *2: A/T
3 EX
A14585
INSPECTION PROCEDURE HINT: Read freeze frame data using the hand–held tester, as freeze frame data records the engine conditions when the malfunction is detected. When troubleshooting, it is useful for determining whether the vehicle was running or stopped, the engine was warmed up or not, the air–fuel ratio was lean or rich, etc. at the time of the malfunction.
1
Are there any other codes (besides P0505) being output?
YES 1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
Go to relevant DTC chart (See page DI–14).
DI–86 DIAGNOSTICS –
ENGINE
NO
2
Check ISC valve (See page FI–41).
NG
Replace ISC valve.
OK
3
Check voltage between terminal RS O of e ngine EC U connector an d body ground. PREPARATION: (a) Remove the glove compartment (See page FI–58). (b) Disconnect the E18 connector from the engine ECU. (c) Turn the ignition switch ON. CHECK: Measure the voltage between terminal RSD of the engine ECU connector and body ground.
ON
M/T
RSO (+)
OK: Voltage: 9 – 14 V
(–)
E18 Connector
A/T
E18 Connector
RSO (+)
(–)
OK
Check and replace engine ECU (See page IN–20).
A11722
NG
4
Check operation of ISC valve.
PREPARATION: (a) Connect the hand–held tester to the DLC3. (b) Turn the ignition switch ON and push the hand–held tester main switch ON. (c) Select the ACTIVE TEST mode on the hand–held tester. CHECK: Check the engine speed when the ISC valve is operated by the hand–held tester. 1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
DI–87 DIAGNOSTICS –
ENGINE
OK: Engine speed is increased and decreased in according to the change of ISC duty ratio. OK
Go to step 4.
NG
Check for open and short in harness and connector between ISC valve and engine ECU (See page IN–20).
5
Check air induction system (See page FI–1).
NG
Repair or replace.
OK
6
Check for A/C signal circuit (See page DI–129).
NG
OK
Check and replace engine ECU (See page IN–20).
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
Repair or replace.
DI–88 DIAGNOSTICS –
ENGINE DI7H4–05
D TC
P 1 30 0
Igniter Circuit Malfunction (No. 1)
D TC
P 1 30 5
Igniter Circuit Malfunction (No. 2)
D TC
P 1 31 0
Igniter Circuit Malfunction (No. 3)
D TC
P 1 31 5
Igniter Circuit Malfunction (No. 4)
CIRCUIT DESCRIPTION A Direct Ignition System (DIS) has been adopted. The DIS improves the ignition timing accuracy, reduces high–voltage loss and enhances overall reliability of the ignition system by eliminating the distributor. The DIS is a 1–cylinder ignition system which ignites one cylinder with one ignition coil. In the 1–cylinder ignition system, the spark plug is connected to the end of the secondary winding. High voltage generated in the secondary winding is applied directly to the spark plug. The spark of the spark plug passes from the center electrode to the ground electrode. The engine ECU determines ignition timing and outputs the ignition signals (IGT) for each cylinder. Based on the IGT signals, the power transistors in the igniter cut the current off to the primary coil in the ignition coil is supplied to the spark plug connected to the end of the secondary coil. At the same time, the igniter also sends an ignition confirmation signal (IGF) as a fail–safe measure to the engine ECU.
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
DI–89 DIAGNOSTICS –
ENGINE
From Battery
Engine ECU Igniter
IGT1 Crankshaft Position Sensor
Spark Plug Ignition Coil No. 1 Ignition Coil with Igniter
IGT2
No. 1 Cylinder
No. 2 Ignition Coil with Igniter
No. 2 Cylinder IGT3 Camshaft Position Sensor
No. 3 Ignition Coil with Igniter
No. 3 Cylinder IGT4
No. 4 Ignition Coil with Igniter
No. 4 Cylinder IGF TAC
To Tachometer A12051
DTC No.
DTC Detection Condition
P1300 P1305 P1310
Trouble Area Ignition system Open or short in IGF or IGT circuit from ignition coil with ignit-
No IGF signal to engine ECU while engine is running
P1315
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
er to engine ECU Ignition coil with igniter Engine ECU
DI–90 DIAGNOSTICS –
ENGINE
WIRING DIAGRAM
Engine ECU Spark Plug B
I2 1 No. 1 Ignition Coil with Igniter 3 B–R
L–R
20*1, 10*2 E18
IGT1
B–W
4
2 Spark Plug
B
From Terminal 1 of Ignition SW (See page DI–113)
B–R
I3 1 No. 2 Ignition Coil with Igniter 3 4
B
B
B–R
B–R N2 Noise Filter
22*1, 12*2 IGT3 E18
B
2 Spark Plug
B–R
2
B–W
B–W 4
B
B–W
2
I16 1 No. 3 Ignition Coil with Igniter 3
B
B
21*1, 11*2 IGT2 E18
Spark Plug
B–R
B
L–W
B–W I17 1 No. 4 Ignition Coil with Igniter 3
B
4
B–W
2
23*1, 13*2 IGT4 E18 3*1, 25*2 B–W E18 IGF
B–R EX
*1: M/T *2: A/T
A13782
INSPECTION PROCEDURE HINT: If If If If
DTC DTC DTC DTC
P1300 P1305 P1310 P1315
is is is is
displayed, displayed, displayed, displayed,
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
check check check check
No. No. No. No.
1 2 3 4
ignition ignition ignition ignition
coil coil coil coil
with with with with
igniter igniter igniter igniter
circuit. circuit. circuit. circuit.
DI–91 DIAGNOSTICS –
ENGINE
Read freeze frame data using the hand–held tester, as freeze frame records the engine conditions when the malfunction is detected. When troubleshooting, it is useful for determining whether the vehicle was running or stopped, the engine was warmed up or not, the air–fuel ratio was lean or rich, etc. at the time of the malfunction.
1
Check fo r sp ark pl ug a nd spark f or m isfiring cy linder (S ee p age IG –1).
NG
Go to step 3.
OK
2
Check for open and short in harness and connector in IGF signal circuit between engine ECU and ignition coil with igniter (See page IN–20).
NG
Repair or replace harness or connector.
OK
3
Disconnect ignition coil with igniter connector and check voltage between terminals IGF of engine ECU connector and body ground. PREPARATION: (a) Remove the glove compartment (See page FI–58). (b) Disconnect the ignition coil with igniter connector. (c) Turn the ignition switch ON. CHECK: Measure the voltage between terminal IGF of the engine ECU connector and the body ground. OK: Voltage: 4.5 – 5.5 V
ON IGF M/T
(+)
A/T
(–)
IGF
(+)
(–)
A11731
NG 1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
OK
Replace ignition coil with igniter.
DI–92 DIAGNOSTICS –
ENGINE
Check and replace engine ECU (See page IN–20).
4
Check for open and short in harness and connector in IGT signal circuit between engine ECU and ignition coil with igniter (See page IN–20).
NG
Repair or replace harness or connector.
OK
5
Check voltage between terminals IGT1 – IGT4 of engine ECU connector and body ground. PREPARATION: (a) Remove the glove compartment (See page FI–58). (b) Turn the ignition switch ON. CHECK: Measure the voltage between terminals IGT1 – IGT4 of the engine ECU connector and body ground when the engine is
ON IGT4 IGT3 IGT2 IGT1 M/T
(+)
A/T
cranked. OK: Voltage: More than 0.1 V and less than 4.5 V
(–)
IGT4 IGT3 IGT2 IGT1
(+)
(–)
A11732
Reference: INSPECTION USING OSCILLOSCOPE
IGT and IGF Signal Waveforms 2 V/Division
IGT GND IGF GND 20 msec./Division
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
A03401
During cranking or idling, check the waveforms between terminals IGT1 – IGT4 and E1, and IGF and E1 of the engine ECU connector. HINT: The correct waveform is as shown in the illustration, with rectangle waves. NG
Check and replace engine ECU (See page IN–20).
DI–93 DIAGNOSTICS –
ENGINE
OK
6
Disconnect igni tion coil with igniter connector and check voltage between terminals IGT1 – IGT4 of engine ECU connector and body ground. PREPARATION: (a) Remove the glove compartment (See page FI–58).
ON IGT4 IGT3 IGT2 IGT1
M/T
(+)
A/T
(b) Disconnect the ignition coil with igniter connector. CHECK: Measure the voltage between terminals IGT1 – IGT4 of the engine ECU connector and body ground when the engine is cranked. OK: Voltage: More than 0.1 V and less than 4.5 V
(–)
IGT4 IGT3 IGT2 IGT1
(+)
(–)
NG
A11732
Replace ignition coil with igniter (See page IN–20).
OK
7
Check ignition coil with igniter power source circuit. PREPARATION: Disconnect the ignition coil with igniter connector. CHECK: Measure the voltage between terminal 1 of the ignition coil with igniter connector and body ground when the ignition switch is turned to ON and START position. OK: Voltage: 9 – 14 V
ON 1 START (–) (+)
A01861
OK
NG
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
Repair ignition coil with igniter power source circuit.
DI–94 DIAGNOSTICS –
8
ENGINE
Check for open and short in harness and connector between ignition switch and ignition coil with igniter (See page IN–20).
NG
OK
Replace ignition coil with igniter.
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
Repair or replace harness or connector.
DI–95 DIAGNOSTICS –
ENGINE DI1EH–12
D TC
P 1 33 5
Crankshaft Position Sensor Circuit Malfunction (During engine running)
CIRCUIT DESCRIPTION Refer to DTC P0335 on page DI–73. DTC No.
DTC Detection Condition
Trouble Area Open or short in crankshaft position sensor circuit
P1335
3 sec. after from engine starting, no crankshaft position sensor signal to engine ECU with engine speed 1,000 rpm or more for 0.05 sec.
WIRING DIAGRAM Refer to DTC P0335 on page DI–73.
INSPECTION PROCEDURE Refer to DTC P0335 on page DI–73.
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
Crankshaft position sensor Crank angle sensor plate Engine ECU
DI–96 DIAGNOSTICS –
ENGINE DI7H5–05
D TC
P 1 34 6
VVT Sensor/Camshaft Position Sensor Circuit Range/Performance Problem (Bank 1)
CIRCUIT DESCRIPTION Refer to DTC P0335 on page DI–73. DTC No.
DTC Detection Condition
Trouble Area Mechanical system (Jumping teeth of timing chain, chain
P1346
Deviation in crankshaft position sensor signal and camshaft position sensor signal (2 trip detection logic)
stretched) Engine ECU
WIRING DIAGRAM Refer to DTC P0335 on page DI–73.
INSPECTION PROCEDURE HINT: Perform the troubleshooting of DTC P0335 first. If no trouble is found, troubleshoot the following me chanical systems. Read freeze frame data using the hand–held tester, as freeze frame data records the engine condi tions when the malfunction is detected. When troubleshooting, it is useful for determining whether the vehicle was running or stopped, the engine was warmed up or not, the air–fuel ratio was lean or rich, etc. at the time of the malfunction.
1
Check valve timing (Check for loose and jumping teeth of timing chain) (See page EM–16).
NG
OK
Check and replace engine ECU (See page IN–20).
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
Adjust valve timing (Repair or replace timing chain).
DI–97 DIAGNOSTICS –
ENGINE DI80L–01
D TC
P 1 34 9
VVT System Malfunction (Bank 1)
CIRCUIT DESCRIPTION The VVT system controls the intake valve timing properly according to the driving condition. The engine ECU controls the OCV (Oil Control Valve) to make the intake valve timing properly and the oil pressure controlled by the OCV is supplied to the VVT controller, which changes the relative position between the camshaft and the crankshaft. DTC No.
DTC Detection Condition
Trouble Area
Condition (a) or (b) continues for 5 sec. or more under condition of water temp. is between 80 C (176F) and 110C P1349
OCV
(230F) and engine speed is 400 – 4,000 rpm: (a) Valve timing does not change from current valve timing (b) Current valve timing is fixed
Valve timing VVT controller assembly Engine ECU
WIRING DIAGRAM Engine ECU C17 OCV R
2*1, 24*2 E18 OCV+
W
1*1, 23*2 E18 OCV–
1
2
*1: M/T *2: A/T A12069
INSPECTION PROCEDURE HINT: If DTC P1349 is displayed, check the VVT system circuit. Read freeze frame data using the hand–held tester, as freeze data frame records the engine condi tions when the malfunction is detected. When troubleshooting, it is useful for determining whether the vehicle was running or stopped, the engine was warmed up or not, the air–fuel ratio was lean or rich, etc. at the time of the malfunction.
1
Check valve timing (See page EM–13).
NG
OK
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
Adjust valve timing.
DI–98 DIAGNOSTICS –
2
ENGINE
Check o peration of O CV f or V VT.
PREPARATION: (a) Start the engine and warmed it up. (b) Connect the hand–held tester and select the VVT in the ACTIVE TEST menu. CHECK: Check the engine speed when the VVT active test is impossible. OK: OCV is in the OFF state: Normal engine speed OCV is in the ON state: Rough idle or engine stall OK
VVT system is OK.*
*: DTC P1349 is also output when the foreign object is detected in some parts of the system in the engine oil, and then the system returns to normal in a short time. As the engine ECU is controled to eject the foreign objects, there is no problem on the VVT. There is also no problemon the VVT as the oil filter should catch the foreign object in the engine oil. NG
3
Check voltage between terminals OCV+ and OCV– of engine ECU connector. OCV Signal Waveform 5 V/Div. (A)
(A)
(A)
GND
1 msec./Division
A02397
Reference: INSPECTION USING OSCILLOSCOPE Turn the ignition switch ON, check the waveform between terminals OCV+ and OCV– of the engine ECU connector. HINT: The correct waveform is as shown in the illustration. The waveform frequency (A) becomes longer as the en gine speed becomes higher. NG
Check and replace engine ECU (See page IN–20).
OK
4
Check VV T c ontroller as sembly ( See p age E M–32).
NG
OK 1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
Replace VVT controller assembly, and then go to step 5.
DI–99 DIAGNOSTICS –
5
ENGINE
Check O CV (See page FI–40).
NG
Replace O CV, a nd then go to s tep 6 .
OK
6
Check blockage of OCV and oil hole.
NG
Repair or replace.
OK
7
Check whether or not DTC P1349 is stored.
PREPARATION: (a) Clear the DTC (See page DI–3). (b) Perform simulation test. CHECK: Check whether or not DTC P1349 is stored (See page DI–3). OK: DTC P1349 is not stored. OK
VVT system is OK.*
*: DTC P1349 is also output when the foreign object is detected in some parts of the system in the engine oil, and then the system returns to normal in a short time. As the engine ECU is controled to eject the foreign objects, there is no problem on the VVT. There is also no problemon the VVT as the oil filter should catch the foreign object in the engine oil. NG
Check and replace engine ECU (See page IN–20).
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
DI–100 DIAGNOSTICS –
ENGINE DI80M–01
D TC
P 1 52 0
Stop Light Switch Signal Circuit (Only for A/T models)
CIRCUIT DESCRIPTION The purpose of this circuit is to prevent the engine from stalling while driving in lock–up condition, when brakes are suddenly hit. When the brake pedal is depressed, this switch sends a signal to the engine ECU. Then the Engine ECU cancels the operation of the lock–up clutch while the braking is in progress. DTC No.
P1520
DTC Detection Condition
Trouble Area
After vehicle speed has been exceeded in 30km/h even once,
Open or short in stop light switch signal circuit
stop light switch does not turn off even once (2 trip detection
Stop light switch
logic)
Engine ECU
WIRING DIAGRAM Sedan S11 Stop Light Switch W /B J l 10 e n a P tn e m u tr s 1 n I
Center J/B
G–W 1
2
21 3F
8 3D
IG
8
Engine ECU 4*5, 6*6 G–W E20 STP
3C
P O T S
G–W
IA
W–R*5 W*6
*1: J12 (LHD), J28 (RHD) *2: J13 (LHD), J29 (RHD) *3: J10 (LHD), J30 (RHD) *4: J11 (LHD), J31 (RHD) *5: LHD *6: RHD *7: M/T G–W *8: A/T
6 5
G–W F *1
D *2
F17 T L A
ID1 *5 II1 *6
*2
D FL Block
6
2
1 R8 Stop Light RH
4
B–G
H8 High Mounted Stop Light
4
A
*4
A
*4
2 W–B
W–B
FL Main
G–W
G–W
R7 Stop Light LH
F15
F *1 J/C
A
*4
W–B A
*3
A
*3
J/C Battery
W–B
W–B
BM BL*5, BN*6 1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
A14588
DI–101 DIAGNOSTICS –
ENGINE
Wagon S11 Stop Light Switch W /B J l 10 e n a P t n e m tru s 1 n I
2
Center J/B 21 3F
G–W 1
8 3D
IG
8
Engine ECU 4*3, 6*4 G–W E20 STP
3C
P O T S
G–W 6
IA
5
*1: *2: *3: *4:
G–W
W–R*3 W*4 G–W
B C *2
*1
C
*2
F17 T L A
ID1 *3 II1 *4
FL Block
2
2
H8 High Mounted Stop Light
4
A
*2
A
*2
2 W–B
W–B
FL Main
1
R8 Stop Light RH
4
B–G
G–W
G–W
R7 Stop Light LH
F15
C *2 J/C
A
J16 (LHD), J34 (RHD) J17 (LHD), J35 (RHD) LHD RHD
*2
W–B A
*2
A
*2
J/C Battery
W–B BR
W–B BS
A14588
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
DI–102 DIAGNOSTICS –
ENGINE
Lift Back S11 Stop Light Switch W /B J l 10 e n a P t n e m rs u t 1 In
Center J/B
G–W 2
21 3F
8 3D
Engine ECU 4*1, 6*2 G–W E20 STP
1
IG
8
P O T S
3C G–W
ID1 1 II1 **2 G–W D J14 *1 B J32 *2
6 5
IA *1: LHD *2: RHD
W–R*1 W*2
D
C
J14 *1 F J15 *1 2 C J33 * 2 G–W
J33 *2
G–W
F J15 *1 C J33 *2 2 G–W 1 R7 R8 H8 Stop Light Stop Light High Mounted LH RH Stop Light W–B*2 4 2 4 W–B*1 W–B*1
F17 T L A
J/C
FL Block
F15 B–G
B J15
FL Main
E J15
E J14 B J14 W–B*1 W–B*1
Battery
E J15
J/C
E J33 J/C
W–B*2 B
B BO
BP
W–B
J14 W–B*1
W–B*2 W–B*2
W–B*2
W–B*2 BQ
A14623
INSPECTION PROCEDURE HINT: Read freeze frame data using the hand–held tester,as freeze frame data records the engine conditions when the malfunction is detected. When troubleshooting, it is useful for determining whether the vehicle was running or stopped, the engine was warmed up or not, the air–fuel ratio was lean or rich, etc. at the time of the malfunction.
1
Check operation of stop light.
CHECK: Check if the stop lights go on and off normally when the brake pedal is depressed and released. NG
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
Check and repair stop light circuit.
DI–103 DIAGNOSTICS –
ENGINE
OK
2
Check STP signal. PREPARATION: (a) Connect the hand–held tester to the DLC3. (b) Turn the ignition switch ON and push the hand–held tes-
ON
Brake Pedal Depressed
Brake Pedal Released
ter main switch ON. CHECK: Read the STP signal on the hand–held tester. OK: Brake Pedal
A14580
OK
STP signal
Depressed
ON
Released
OFF
Check for intermittent problems (See page DI–3).
NG
3
Check harness and connector between engine ECU and stop light switch (See page IN–10).
NG
OK
Check and replace engine ECU.
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
Repair or replace harness or connector.
DI–104 DIAGNOSTICS –
ENGINE DI1ME–16
D TC
P 1 60 0
Engine ECU BATT Malfunction
CIRCUIT DESCRIPTION Battery voltage is supplied to terminal BATT of the engine ECU even when the ignition switch is OFF for use by the DTC memory and air–fuel ratio adaptive control value memory, etc. DTC No.
DTC Detection Condition
Trouble Area Open in back up power source circuit
P1600
Open or short in back up power source circuit for 3 sec.
Engine ECU
HINT: If DTC P1600 is displayed, the engine ECU does not store another DTC.
WIRING DIAGRAM Engine ECU
Engine Room J/B FL Main
W
1 2H
EFI
2 2B
B–Y
1
1
E20 E21 *1 *2
BATT
Battery *1: M/T *2: A/T
A12071
INSPECTION PROCEDURE HINT: Read freeze frame data using the hand–held tester,as freeze frame data records the engine conditions when the malfunction is detected. When troubleshooting, it is useful for determining whether the vehicle was running or stopped, the engine was warmed up or not, the air–fuel ratio was lean or rich, etc. at the time of the malfunction.
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
DI–105 DIAGNOSTICS –
1
ENGINE
Check voltage between terminal BATT of engine ECU connector and body ground. PREPARATION: Remove the glove compartment (See page FI–58). CHECK: Measure the voltage between terminal BATT of the engine ECU connector and body ground. OK: Voltage: 9 – 14 V
LOCK BATT
M/T
(+) (–)
A/T
BATT
(+)
(–)
OK A11749
Check and replace engine ECU (See page IN–20).
NG
2
Check EFI fuse. PREPARATION: Remove the EFI fuse from the engine room J/B. CHECK: Check the continuity of the EFI fuse. OK: Continuity
Engine Room J/B
NG
EFI Fuse A05531
Check for short in all harness and components connected to EFI fuse.
OK
Check and repair harness or connector between battery and EFI fuse, and EFI fuse and engine ECU.
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
DI–106 DIAGNOSTICS –
ENGINE DI7H7–02
D TC
P 1 65 6
OCV Circuit Malfunction (Bank 1)
CIRCUIT DESCRIPTION Refer to DTC P1349 on page DI–97. DTC No.
DTC Detection Condition
Trouble Area Open or short in OCV circuit
P1656
OCV
Open or short in OCV circuit
Engine ECU
WIRING DIAGRAM Refer to DTC P1349 on page DI–97.
INSPECTION PROCEDURE HINT: Read freeze frame data using the hand–held tester, as freeze frame data records the engine conditions when the malfunction is detected. When troubleshooting, it is useful for determining whether the vehicle was running or stopped, the engine was warmed up or not, the air–fuel ratio was lean or rich, etc. at the time of the malfunction.
1
Check OCV circuit.
PREPARATION: (a) Start the engine and warm it up. (b) Connect the hand–held tester and select the VVT on the ACTIVE TEST menu. CHECK: Check the engine speed when operating the OCV by the hand–held tester. OK: VVT system is OFF (OCV is OFF): Normal engine speed VVT system is ON (OCV is ON): Rough idle or engine stalled OK
NG
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
Check for intermittent problems (See page DI–3).
DI–107 DIAGNOSTICS –
2
ENGINE
Check operation of OCV. PREPARATION: (a) Start the engine and warm it up. (b) Disconnect the OCV connector. (c) Apply battery voltage between the terminals of the OCV. CHECK: Check the engine speed. OK: Rough idle or engine stalled.
START
A13813
NG
Replace OCV.
OK
3
Check voltage between terminals OCV+ and OCV– of engine ECU connector (See page DI–97, step 3).
NG
Check and replace engine ECU (See page IN–20).
OK
4
Check for open and short in harness and connector between OCV and engine ECU (See page IN–20).
NG
OK
Check for intermittent problems (See page DI–3).
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
Repair or replace.
DI–108 DIAGNOSTICS –
ENGINE DI80N–01
D TC
1 78 0
Neutral Start Switch Malfunction (Only for A/T)
CIRCUIT DESCRIPTION The neutral start switch detects the shift lever range and sends signals to the engine ECU. The engine ECU receives signals (NSW, R, 2 and L) from the neutral start switch. When the signal is not sent to the engine ECU from the neutral start switch, the engine ECU judges that the shift lever is in D range. DTC No.
DTC Detection Condition
Trouble Area
2 or more switches are ON simultaneously for N, 2, L and R positions (2 trip detection logic) P1780
When driving under conditions (a) and (b) for 30 seconds or
Short in neutral start switch circuit
more neutral start switch is ON (N position): (2 trip detec-
Neutral start switch
tion logic)
Engine ECU
(a) Vehicle speed: 70 km/h (44 mph) or more (b) Engine speed: 1,500 – 2,500 rpm
WIRING DIAGRAM N1 Neutral Start Switch
Center J/B
W–B
B–W
20 3D
R–B
3 3C
3 3D
R–L
10 3C
9
6
2 3
Engine ECU
7 3E
B–W
R–B
13 E20 NSW 2 E20 R
10 3A R–L O
3 E20 2
Y–G
12 E20 L
4 8 J9 (LHD) J20 (RHD) J/C
A
W FL Main
Battery
FL Block 2*1, 1*2 ALT W F15 F17 1
R–L Instrument Panel J/B I13 IF 10 Ignition SW GAUGE 5 B–Y IC 8 5 2 IA
AM1 1
2
3 IC
W *1: LHD *2: RHD
IJ*1, II*2 A14589
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
DI–109 DIAGNOSTICS –
ENGINE
INSPECTION PROCEDURE HINT: Read freeze frame data using the hand–held tester, as freeze frame data records the engine conditions when the malfunction is detected. When troubleshooting, it is useful for determining whether the vehicle was running or stopped, the engine was warmed up or not, the air–fuel ratio was lean or rich, etc. at the time of the malfunction.
1
Read NSW, REVERSE, 2ND and LOW signals.
PREPARATION: (a) Connect the hand–held tester to the DLC3. (b) Turn the ignition switch ON and push the hand–held tester main switch ON. CHECK: Shift the shift lever into the P, R, N, 2 and L ranges, and read the NSW, REVERSE, 2ND and LOW signals on the hand–held tester. OK: Shift Range
N
Signal
2
OFF2ND
→
L
OFF LOW
→
R
REVERSE OFF
P,
OFF NSW
OK
ON ON →
→
ON
ON
Check and replace engine ECU (See page IN–20).
NG
2
Check n eutral s tart s witch. PREPARATION: Remove the neutral start switch. CHECK: Check the continuity between each terminal shown below when the shift lever is shifted to each range. Shiftrange P R D06601
TerminalNo.toContinuity 3
3
N
– –
5
91 2
–
93
–
6
– –
D
7
–
3
–
2
4
–
3
–
L
8
–
3
–
6
OK: There is continuity. NG 1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
Replace neutral start switch.
DI–110 DIAGNOSTICS –
ENGINE
OK
3
Check harness and connector between battery and neutral start switch, and neutral start switch and engine ECU (See page IN–10).
NG
OK
Check and replace engine ECU (See page IN–10).
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
Repair or replace harness or connector.
DI–111 DIAGNOSTICS –
ENGINE DI7H9–03
Starter Signal Circuit CIRCUIT DESCRIPTION When the engine is cranked, the intake air flow is slow, so fuel vaporization is poor. A rich mixture is therefore necessary in order to achieve good startability. While the engine is being cranked, the battery voltage is applied to terminal STA of the engine ECU. The starter signal is mainly used to increase the fuel injection volume for the starting injection control and after–start injection control.
WIRING DIAGRAM
Instrument Panel J/B
I13 Ignition SW
1
ID
4
3
4
ST
2
Engine ECU
W–R
ID
R
IC
6 IE W–B
W–R 6 2C
B–W Engine Room J/B 3 2A STARTER Relay 6 1
AM2
2
1
B–W (A/T)
2A 1
MAIN 2 5
3
(M/T)
Center J/B 20 3E
STA
B
2D
7 3E R–G
1 2 F24 Fuse Box
1 2H B
W
1 1
N1 Neutral Start Switch IF1 (LHD) IE1 (RHD)
11 E20 STA
B–W (A/T) 9
6 B–W (A/T)
B–R FL Main
B Battery
1
1 S5 Starter
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
J9 (LHD) J20 (RHD) J/C
S6
IJ (LHD) II (RHD) A14590
DI–112 DIAGNOSTICS –
ENGINE
INSPECTION PROCEDURE HINT: This diagnostic chart is based on the premise that the engine is cranked normally. If the engine is not cranked, proceed to the problem symptoms table on page DI–24.
1
Check STA signal.
PREPARATION: (a) Connect the hand–held tester to the DLC3. (b) Turn the ignition switch ON and push the hand–held tester main switch ON. CHECK: Read the STA signal on the hand–held tester while the starter is operating. OK: Ignition Switch Position Signal STA
ON OFF
OK
START ON
Proceed to next circuit inspection shown on problem symptoms table (See page DI–24).
NG
2
Check for open in harness and connector between engine ECU and starter relay (See page IN–20).
NG
OK
Check and replace engine ECU.
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
Repair or replace harness or connector.
DI–113 DIAGNOSTICS –
ENGINE DI7HA–05
Engine ECU Power Source Circuit CIRCUIT DESCRIPTION When the ignition switch is turned ON, battery voltage is applied to terminal IGSW of the engine ECU and the EFI main relay (Marking: EFI MAIN) control circuit in the engine ECU sends a signal to the terminal MREL of the engine ECU switching on the EFI main relay. This signal causes current to flow to the coil, closing the contacts of the EFI main relay and supplying power to terminals +B of the engine ECU. If the ignition switch is turned off, the engine ECU continues to switch on the EFI main relay for a maximum of 2 seconds for the initial setting of the ISC valve.
WIRING DIAGRAM Engine Room J/B Engine ECU EFI Main Relay EFI 5
3
2
1
5 2B
12
B–R
4 B
2B
15
6
AM2
2C 1
1 2F
2H
W–B
W–B
W
/B J l e n a P t n e m u tr s n I
2 IG
2 ID
IGN 1
2
ID
4
W–B
EA
EB
*1: M/T *2: A/T
L–R
1 BR
W–B Battery
IC
I13 Ignition SW
W–R FL Main
8
E20 E21 IGSW *1 *2 B–R
W–R
3 2F
16
E20 E21 +B *1 *2 16*1, 21*2 E20 MREL
14 17 E18 E19 E1 *1
*2
EX
A14620
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
DI–114 DIAGNOSTICS –
ENGINE
INSPECTION PROCEDURE 1
Check voltage between terminals
+B
and E1 of engine ECU connectors.
PREPARATION: (a) Remove the glove compartment (See page FI–58). (b) Turn the ignition switch ON. CHECK: Measure the voltage between terminals +B and E1 of the en-
ON
M/T
gine ECU connectors. OK: Voltage: 9 – 14 V E1
(–)
(+)
A/T
+B
+B
E1
(–)
(+)
OK
Proceed to next circuit inspection shown in problem symptoms table (See page DI–24).
A11723
NG
2
Check for open in harness and connector between terminal E1 of engine ECU and body ground (See page IN–20).
NG
OK
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
Repair or replace harness or connector.
DI–115 DIAGNOSTICS –
3
ENGINE
Check vol tage b etween terminal IG SW o f en gine E CU c onnector a nd b ody ground. PREPARATION: (a) Remove the glove compartment (See page FI–58). (b) Turn the ignition switch ON. CHECK: Measure the voltage between terminal IGSW of the engine ECU connector and the body ground. OK: Voltage: 9 – 14 V
ON IGSW M/T
(–)
(+) IGSW
A/T
(–)
(+)
OK
Go to step 7.
A11724
NG
4
Check AM2 fuse. PREPARATION: Remove the AM2 fuse from the engine room J/B. CHECK: Check the continuity of the AM2 fuse. OK: Continuity
Engine Room J/B
NG AM2 Fuse
OK
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
A05531
Replace AM2 fuse.
DI–116 DIAGNOSTICS –
5
ENGINE
Check IGN fuse.
Instrument Panel J/B IGN Fuse
PREPARATION: Remove the IGN fuse from the instrument panel J/B. CHECK: Check the continuity of the IGN fuse. OK: Continuity NG
Replace IGN fuse.
A05532
OK
6
Check ignition switch (See Pub. No. RM781E, BE section).
NG
OK
Check and repair harness and connector between battery and ignition switch, and ignition switch and engine ECU.
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
Replace ignition switch.
DI–117 DIAGNOSTICS –
7
ENGINE
Check vol tage b etween t erminal MR EL o f en gine E CU c onnector an d bo dy ground. PREPARATION: (a) Remove the glove compartment (See page FI–58). (b) Turn the ignition switch ON. CHECK: Measure the voltage between terminal MREL of the engine ECU connector and body ground. OK: Voltage: 9 – 14 V
ON MREL
M/T
(–)
(+) MREL
A/T
(–)
(+)
NG A11727
Check and replace engine ECU (See page IN–20).
OK
8
Check EFI fuse. PREPARATION: Remove the EFI fuse from the engine room J/B. CHECK: Check the continuity of the EFI fuse. OK: Continuity
Engine Room J/B
NG EFI Fuse
A05531
Check for short in all harness and components connected to EFI fuse.
OK
9
Check EFI main relay (Marking: EFI) (See page FI–45).
NG
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
Replace EFI m ain r elay.
DI–118 DIAGNOSTICS –
ENGINE
OK
10
Check for open and short in harness and connector between terminal MREL of engine ECU and body ground (See page IN–20).
NG OK
Check and repair harness or connector between EFI fuse and battery.
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
Repair and replace harness or connector.
DI–119 DIAGNOSTICS –
ENGINE DI80Q–01
Injector Circuit CIRCUIT DESCRIPTION Misfire: The engine ECU uses the crankshaft position sensor and camshaft position sensor to monitor changes in the crankshaft rotation for each cylinder. The engine ECU counts the number of times the engine speed change rate, indicating that misfire has occurred. And when the misfire rate equals or exceeds the count indicating that the engine condition has deteriorated, the CHK ENG (MIL) lights up. If the misfire rate is high enough and the driving conditions causes catalyst overheating, the CHK ENG (MIL) blinks when misfiring occurs.
WIRING DIAGRAM Refer to DTC No. P0300 on page DI–64.
INSPECTION PROCEDURE 1
Check wi re harness, connector and vacuum hose in engine room.
CHECK: (a) Check the connection conditions of the wire harness and connector. (b) Check the disconnection, piping and break of the vacuum hose. NG
Repair o r replace, then confirm that there is no misfire (See confirmation driving pattern).
OK
2
Check sp ark plug and spark of mi sfiring cylinder (S ee page FI–22).
NG
OK
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
Replace or check i gnition s ystem (See page IG–1).
DI–120 DIAGNOSTICS –
3
Check voltage of engine ECU terminals for injector of faulty cylinder. PREPARATION: (a) Remove the glove compartment (See page FI–58). (b) Turn the ignition switch ON. CHECK: Measure the voltage between appli cable terminals #10 – #40 of the engine ECU connector and body ground. OK: Voltage: 9 – 14 V
ON #20 M/T #10
#30
#40 (+)
A/T
ENGINE
#40 #30
(–)
#20 #10
(+)
(–)
A11717
Reference: INSPECTION USING OSCILLOSCOPE With the engine idling, check the waveform between terminals #10 – #40 and E01 of the engine ECU connector. HINT: The correct waveform is as shown. Injector Signal Waveform 20 V/ Division
20 V/ Division
GND
GND
(Magnification)
50 msec./Division (Idling)
1 msec./Division (Idling) Injection duration
OK
NG
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
Go to step 5.
A12490
DI–121 DIAGNOSTICS –
4
ENGINE
Check res istance of in jector o f mis firing cy linder (S ee p age FI –22).
NG
Replace i njector.
OK
Check for open and short in harness and connector between injector and engine ECU (See page IN–20).
5
Check fuel pressure (See page FI–7, FI–13).
NG
Check an d r epair fuel pu mp, pr essure regulator, fuel pipe line and filter (See page FI–1).
OK
6
Check injector injection (See page FI–22).
NG
Replace i njector.
OK
7
Check air flow meter (See page FI–30) and water temperature sensor (See page FI–50).
NG OK
Check compression pressure (See page EM–4) and valve clearance (See page EM–5). 1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
Repair or replace.
DI–122 DIAGNOSTICS –
ENGINE DI80R–01
Stop Light Switch Signal Circuit (Only for M/T Models) CIRCUIT DESCRIPTION Refer to DTC No. P1520 on page DI–100
WIRING DIAGRAM Refer to DTC No. P1520 on page DI–100
INSPECTION PROCEDURE 1
Check voltage vetween terminal STP of engine ECU conector and body ground. ON
Brake Pedal Released
Brake Pedal Depressed
PREPARATION: (a) Remove the glove compartment (See page FI–58). (b) Turn the ignition switch ON. CHECK: Check the voltage between terminal STP of the engine ECU connector and body ground. OK: Brake Pedal
M/T
Depressed Released
Voltage 7.5 14 –V Below 1.5 V
(+)
(–)
A/T
STP
(–)
STP
(+)
OK
Check f or intermittent problems (See page DI–3).
A12480
NG
2
Check harness and connector between engine ECU and stop light switch (See page IN–20).
NG 1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
Repair or replace harness or connector.
DI–123 DIAGNOSTICS –
OK
Check and replace engine ECU (See page IN–20).
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
ENGINE
DI–124 DIAGNOSTICS –
ENGINE DI80O–01
Fuel Pump Control Circuit CIRCUIT DESCRIPTION In the below diagram, when the engine is cranked, current flows from terminal ST of the ignition switch to the starter relay coil and also current flows to terminal STA of engine ECU (STA signal). When the STA signal and NE signal are input to the engine ECU, Tr is turned ON, current flows to coil of the circuit opening relay, the relay switches on, power is supplied to the fuel pump and the fuel pump operates. While the NE signal is generated (engine running), the engine ECU keeps Tr ON (circuit opening relay ON) and the fuel pump also keeps operating.
WIRING DIAGRAM From Terminal 3 of EFI Relay
C9 Circuit Opening Relay B–R B–R 1 2 L–B
B–R 3
5
W–B
J9 (LHD) J20(RHD) J/C W–B A
Engine ECU 14 3 E20 E21 FC *1 *2
G–R
F27 Fuel Pump 5 3 L–B ID1 IC1 4 5 (LHD)(RHD)
13 IC1 8 ID1 (LHD)(RHD)
W–B *1: M/T *2: A/T
IJ (LHD) II (RHD) A14621
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
DI–125 DIAGNOSTICS –
ENGINE
INSPECTION PROCEDURE 1
Check voltage between terminal FC of engine ECU connector and body ground. PREPARATION: (a) Remove the glove compartment (See page FI–58). (b) Turn the ignition switch ON. CHECK: Measure the voltage between terminal FC of the engine ECU
ON FC M/T
connector and the body ground. OK: Voltage: 9 – 14 V (–)
(+) FC
A/T
(–)
(+)
OK
Go to step 2
A11725
NG
Check for open in harness and connector between EFI m ain relay (Marking: EFI) and circuit opening relay, circuit opening relay and engine ECU.
2
Check for en gine ECU power source circuit (S ee page DI–113).
NG
Repair or replace.
OK
3
Check circuit opening relay (See page FI–46).
NG
OK 1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
Replace c ircuit opening r elay.
DI–126 DIAGNOSTICS –
4
ENGINE
Check fuel p ump (See p age FI–7, FI–13).
NG
Repair o r replace fuel p ump.
OK
5
Check f uel p ump operation. ON
PREPARATION: (a) Remove the glove compartment (See page FI–58). (b) Connect the hand held tester to the DLC3. (c) Turn the i gnition switch ON and push the h and–held tester main switch ON. (d) Select the ACTIVE TEST mode on the hand–held tester. (e) If you have no hand–held tester, connect the positive (+) and negative (–) leads from the battery to the fuel pump connector (See page FI–7, FI–13). CHECK: Check that the pulsation damper screw rises up when the fuel pump operates.
FC
FC
OFF ON
Fuel Inlet Hose
OK:
OFF ON
The pulsation damper screw rises up. A12055
A12055
OK
Proceed to next circuit inspection shown on problem symptoms table (See page DI–24).
NG
6
Check for open in harness and connector between circuit opening relay and fuel pump, and fuel pump and body ground (See page IN–20).
NG
OK
Check and replace engine ECU (See page IN–20). 1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
Repair or replace harness or connector.
DI–127 DIAGNOSTICS –
ENGINE DI6SV–07
Diagnostic Connector (DLC3) Circuit CIRCUIT DESCRIPTION Terminals TC and CG are located in the DLC3. When connecting these terminals, DTCs in normal mode or test mode can be read through the CHK ENG (MIL) flashing in the combination meter.
WIRING DIAGRAM J1 (LHD) D8 J27 (RHD) DLC3 J/C W–B LG–R CG TC A 4 13
J44 J/C
Engine ECU LG–R
F
F
6*1, 5*2 E20
TC
*1: M/T *2: A/T II (LHD) IJ (RHD) A14586
INSPECTION PROCEDURE HINT: Even though terminal TC is not connected with terminal CG, the CHK ENG (MIL) blinks. An open or a short in the wire harness, or malfunction inside the engine ECU is the likely cause of the above the phenomenon.
1
Check vo ltage b etween terminals T C an d C G of D LC3. ON CG (–)
(+) TC
F08565
PREPARATION: Turn the ignition switch ON. CHECK: Measure the voltage between terminals TC and CG of the DLC3. OK: Voltage: 9 – 14 V OK
Check and replace engine ECU (See page IN–20).
NG
2
Check continuity b etween terminal CG o f DLC3 and body ground.
NG
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
Repair or replace harness or connector.
DI–128 DIAGNOSTICS –
ENGINE
OK
3
Check for open and short circuit in harness and connector between engine ECU and DLC3, and DLC3 and body ground (See page IN–20).
NG
OK
Check and replace engine ECU (See page IN–20).
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
Repair or replace harness or connector.
DI–129 DIAGNOSTICS –
ENGINE DI80P–01
A/C Cut Control Circuit CIRCUIT DESCRIPTION This circuit cuts A/C operation during vehicle acceleration in order to increase acceleration performance. During acceleration with the vehicle speed at 25 km/h (16 mph) (A/T model), at 40 km/h (25 mph) (M/T model) or less, engine speed at 1,200 rpm (A/T model),at 1,600 rpm (M/T model) or less and throttle valve opening angle at 60 or more, the A/C magnet switch is turned OFF for several seconds.
WIRING DIAGRAM A15 A/C Amplifier
Engine ECU
ACT
P 15
21 12 E20 E21 *1 *2 *1: M/T *2: A/T
AC1
L–B 5
ACT
+B
10 18 E20 E21 *1 *2 AC
A14618
INSPECTION PROCEDURE 1
Connect han d–held tester and check operation of A/C cut control.
PREPARATION: (a) Connect the hand–held tester to the DLC3. (b) Turn the ignition switch ON and push the hand–held tester main switch ON. (c) Start the engine and switch the A/C switch ON. HINT: The A/C magnet clutch is turned ON. (d) Select the ACTIVE TEST mode on the hand–held tester. CHECK: Check the operation of the A/C magnet clutch cut when the A/C cut control is operated by the hand–held tester. OK: A/C magnet clutch is turned OFF. OK
NG
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
Proceed to next circuit inspection shown in problem symptoms table (See page DI–24).
DI–130 DIAGNOSTICS –
2
ENGINE
Check for open and short in harness and connector between engine ECU and A/C amplifier (See page IN–20).
NG
Repair or replace harness or connector.
OK
3
Check voltage between terminal ACT of engine engine ECU conector and body ground. PREPARATION: (a) Remove the glove compartment (See page FI–58). (b) Start the engine. CHECK: Measure the voltage between terminal ACT of the engine ECU connector and the body ground when the A/C switch is turned to ON and OFF. OK:
START ACT
M/T
(–) (+)
A/CSwitchCondition ON
ACT A/T
OFF
(–)
Voltage V 14 –
5 Below 2.0 V
(+)
NG A12054
OK
Check and replace engine ECU (See page IN–20).
1ZZ–FE, 3ZZ–FE ENGINE (RM782E)
Check a nd r eplace A /C a mplifier.