volvo fh12 Mid 144 Vehicle Ecu

Service Manual Trucks

D

36 Fault Codes Vehicle ECU MID 144 Volvo or Cummins Engine VN, VHD VERSION 2

20175578

Group

Foreword

D

The descriptions and service procedures contained in this manual are based on designs and methods studies carried out up to March 2006. The products are under continuous development. Vehicles and components produced after the above date may therefore have different specifications and repair methods. When this is believed believed to have have a significant significant bearing on this manual, manual, supplementary supplementary service bulletins will be issued to cover the changes. The new edition of this manual will update the changes.

In service procedures where the title incorporates an operation number, this is a reference to an V.S.T. (Volvo Standard Times). Service procedures which do not include an operation number in the title are for general information and no reference is made to an V.S.T. Each section of this manual contains specific safety information and warnings which must be reviewed before performing any procedure. If a printed copy of a procedure is made, be sure to also make a printed copy of the safety information and warnings that relate to that procedure. The following levels of observations, cautions and warnings are used in this Service Documentation Documentation::

Note: Indicates a procedure, practice, or condition that must be followed in order to have the vehicle or component function in the manner intended. Caution: Indicates an unsafe practice where damage to the product could occur. Warning: Indicates an unsafe practice where personal injury or severe damage to the product could occur. Indicates an unsafe unsafe practice where where serious personal personal injury or death could occur. occur. Danger: Indicates

Volvo Trucks North America, Inc. Greensboro, NC USA

Order number: number: 20175578 Repl: 20033671, 20042091 20042091

© 2006 Volvo Trucks North America, Inc., Greensboro, NC USA

All rights reserved. reserved. No part of this publication publication may be reproduced reproduced,, stored in retrieval system, or transmitted in any forms by any means, electronic, mechanical, photocopying, recording or otherwise, without the prior written permission of Volvo Trucks North America, Inc.. USA20715.ihval

Contents Specifications ............................................................. 3 Vehicle ECU ............................................................... 3 Tools .......................................................................... 15 Special Tools ............................................................ 15 Troubleshooting ........................................................ MID 144 Vehicle Control Unit, Fault Codes .............. MID 144 PID 84 Vehicle Speed ................................ MID 144 PID 84 Vehicle Speed, Check .................... MID 144 PID 91 Accelerator Pedal Position (Percentage) ............................................................. MID 144 PID 91 Accelerator Pedal Position (Percentage), Check ................................................. MID 144 PID 150 PTO Output .................................. MID 144 PID 150 PTO Output, Check ...................... MID 144 PID 152 VECU, Number of Resets ............ MID 144 PID 191 Output Shaft Speed ..................... MID 144 PID 191 Output Shaft Speed, Check ......... MID 144 PPID 61 Engine Brake Switch ................... MID 144 PPID 61 Engine Brake Switch, Check ....... MID 144 PPID 69 Buffered Idle Validation Switch .... MID 144 PPID 69 Buffered Idle Validation Switch, Check ....................................................................... MID 144 PPID 70 Pedal Switches, Supply ............... MID 144 PPID 70 Pedal Switches, Supply, Check ... MID 144 PPID 71 Cruise Control and Engine Brake, Switch Supply ................................................ MID 144 PPID 71 Cruise Control and Engine Brake, Switch Supply, Check ....................................

19 19 21 23 27 28 32 34 36 37 40 44 45 48 49 51 52 58 60

D

MID 144 PPID 72 Accelerator Pedal and Engine Brake, Sensors Supply ............................................. 68 MID 144 PPID 72 Accelerator Pedal and Engine Brake, Sensors Supply, Check ................................. 69 MID 144 PPID 74 VECU Power Supply .................... 76 MID 144 PPID 74 Power Supply EECU/VECU, Check ....................................................................... 77 MID 144 SID 230 Idle Validation Switch 1 ................ 79 MID 144 SID 230 Idle Validation Switch 1, Check .... 80 MID 144 SID 231 J1939 Control Link ....................... 82 MID 144 SID 240 Program Memory ......................... 83 MID 144 SID 243 Cruise Control Set Switch ............ 84 MID 144 SID 243 Cruise Control Set Switch, Check 85 MID 144 SID 250 J1587/J1708 Information Data Link ........................................................................... 88 MID 144 SID 253 Calibration Memory EEPROM ..... 89 MID 144 PSID 4 Engine Brake Stalk Lever .............. 90 MID 144 PSID 4 Engine Brake Stalk Lever, Check .. 91 MID 144 PSID 200 Data Link, Engine Control Unit .. 95 MID 144 PSID 202 Data Link, Instrument Control Unit ........................................................................... 96 MID 144 PSID 204 Data Link, Brake Control Unit .... 97 MID 144 PSID 210 J1939 Control Data Link Interruption, Lighting Control Module (LCM) ............ 98 MID 144 PSID 214 Data Link, Bodybuilder Control Unit ........................................................................... 99 MID 144 SID 231 J1939 Control Link ..................... 100

Operation Numbers

1

D

2

Group 36 Fault Codes, VECU, MID 144, Volvo or Cummins Engine

Specifications

Specifications Vehicle ECU Component Locations

D W3005048

A17 VECU PA

Connector, PA1 - 30 (green)

PB

Connector, PB1 - 30 (blue)

PC

Connector (green), J1587/1708 Information Data Link, and J1939 Control Data Link

Note: See corresponding (P)PID/(P)SID for location of components.

3


Description of Signals

Specifications

D

VECU, measurement box connected between VECU and wiring harness, connector PA Prerequisites: • Measurement box 9998699 and adapter 9813194 connected between VECU connector PA and wiring harness. VECU connected. • • Ignition key in DRIVE position. • Engine OFF. • Measure voltage using multimeter.

T0008364

B+ = battery voltage Connection

Signal type

Measuring points

Expected value

PA1

Cruise control SET-/COAST

PA1 - PA12

0V B+ (SET- active)

PA2

Cruise control SET+/ACCEL

PA2 - PA12

0V B+ (SET+ active)

PA3

Cruise control, ON/OFF

PA3 - PA12

0 V (OFF) B+ (ON)

PA4

Fuel priming

PA4 - PA12

0 V (OFF) B+ (ON)

PA5

Brake pedal

PA5 - PA12

B+ 0 V (brake pedal depressed)

PA6

Starting switch, start position

PA6 - PA12

0V B+ (ignition key in START position)

PA7

Starting switch, preheating position

PA7 - PA12

0V B+ (ignition key in preheat position)

PA8

Clutch pedal

PA8 - PA12

B+ 0 V (clutch pedal depressed)

PA9

not used

PA10

not used

PA11

not used

PA12

Ground connection, VECU

PA12 - ground

0V

PA13

Supply voltage, control unit

PA13 - PA12

0 V (ignition key in OFF position) B+ (ignition key in DRIVE position)

PA14

Starting switch, drive position

PA14 - PA12

0 V (ignition key in OFF position) B+ (ignition key in DRIVE position)

PA15

not used

PA16

not used

PA17

not used

PA18

not used

PA19

Manual fan switch

PA19 - PA12

0V B+ (manual fan switch ON)

4

Other

VOLVO only

VOLVO only


Specifications

D

Connection

Signal type

Measuring points

Expected value

PA20

Engine brake, switch no. 1

PA20 - PA12

0 V (ignition key in OFF position) See “Engine Brake Variants” page 13 (ignition key in ON position)

PA21

Engine brake, switch no. 2

PA21 - PA12

0 V (ignition key in OFF position) See “Engine Brake Variants” page 13 (ignition key in ON position)

PA22

reserved

PA22 - PA12

PA23

Idle validation switch 1

PA23 - PA12

0V B+ (accelerator pedal depressed)

PA24

Air conditioning, status switch

PA24 - PA12

0 V (no fan request from A/C) B+ (fan requested by A/C)

PA25

not used

PA26

not used

PA27

not used

PA28

not used

PA29

Power Take-Off, PTO switch

PA29 - PA12

0 V (switch OFF) B+ (switch ON)

PA30

Cruise control, RESUME

PA30 - PA12

0 V (RESUME inactive) B+ (RESUME active)

Other

VOLVO only

5


Specifications

VECU, measurement box connected between VECU and wiring harness, connector PB

D

Prerequisites: • Measurement box 9998699 and adapter 9998533 connected between VECU connector PB and wiring harness. • Measurement box 9998699 and adapter 9813194 connected between VECU connector PA and wiring harness. VECU connected. • Ignition key in DRIVE position. • • Engine OFF. • Measure voltage using multimeter.

T0008363


Signal type

PB1

not used

PB2

not used

PB3

Idle validation switch signal to EECU (redundant)

PB4

not used

PB5

Voltage supply:

Measuring points

Expected value

PB3 - PA12

0 V (accelerator pedal depressed) 4.0 - 6.0 V (accelerator pedal at idle)

PB5 - PA12

≈ B+

PB6 - PB20

0.3 - 9.5 V

PB8 - PA12

0.4 - 0.6 V (no acceleration) 2.6 - 3.8 V (full acceleration) 3.0 - 4.4 V (kickdown)

PB10 - PA12

4.7 - 5.3 V

PB11 - PA12

B+ (parking brake released) 0 V (parking brake applied)

Other

Cummins only

• Cruise control switch

• Engine brake switch

PB6

Vehicle speed sensor (+)

PB7

not used

PB8

Accelerator pedal, position

PB9

not used

PB10

Voltage supply:

• Accelerator

pedal sensor

• Engine brake stalk switch

PB11

Parking brake, status

PB12

not used

PB13

not used

PB14

not used

6

Measurement requires that the output shaft from the gearbox is rotating. Measure the voltage of the signal’s minimum and maximum values.

Engine brake stalk switch - used only for Cummins EBR-CBJ6


D

Specifications

Connection

Signal type

Measuring points

Expected value

PB15

Relay voltage supply,

PB15 - PA12

B+ (ignition key in OFF position) 0 - 1 V (ignition key in DRIVE position)

• VECU, EMS (Volvo)

• VECU

(Cummins)

Other

PB16

PTO output

PB16 - PA12

B+ (inactive) 0 V (active)

VOLVO only

PB17

Buffered idle validation switch

PB17 - PA12

0V B+ (accelerator pedal depressed)

VOLVO only

PB18

not used

PB19

Voltage supply:

PB19 - PA12

≈ B+

PB20 - PB6

0.3 - 9.5 V

Measurement requires that the output shaft from the gearbox is rotating. Measure the voltage of the signal’s minimum and maximum values.

PB22 - PA12

0V

Engine brake stalk switch - used only for Cummins EBR-CBJ6

PB24 - PA12

0.3 - 0.7 V (pos 1) 1.0 - 1.6 V (pos 2) 1.7 - 2.5 V (pos 3) 2.3 - 3.5 V (pos 4) 2.9 - 4.4 V (pos 5) 3.6 - 5.4 V (pos 6)

Cummins ISX with EBR-CBJ6 only; see “Engine Brake Variants” page 13.

PB27 - PA12

B+ (brake pedal released) 0 V (brake pedal depressed)

•

Pedal switches

PB20

Vehicle speed sensor (-)

PB21

not used

PB22

Ground connection:

• Accelerator

pedal Engine brake • stalk switch PB23

not used

PB24

Engine brake stalk switch position sensor

PB25

not used

PB26

not used

PB27

Brake pressure switch

PB28

not used

PB29

not used

PB30

not used

7


Specifications

VECU, measurement box connected to wiring harness, connector PA Prerequisites: • Measurement box 9998699 and adapter 9813194 connected to connector PB on the wiring harness. Measurement box 9998699 and adapter 9998533 • connected to connector PA on the wiring harness. Ignition key in OFF position (unless otherwise stated • in the table). • Measuring resistance using the multimeter (unless otherwise stated in the table).

D

T0008365


Signal type

Measuring points

PA1

Cruise control, SET-/COAST

PA1 - PB5

Cruise control, SET+/ACCEL

PA2 - PB5

Cruise control, ON/OFF

PA3 - PB5

Fuelprimingswitch

PA4 - PA12

PA2 PA3 PA4

Expected value

Brake pedal

(SET-active)

∞

0 ∞

0

PA5 - PB19

Other

∞

0

∞

0 PA5

(SET+ active) (OFF) (ON) (OFF) (ON)

VOLVO only

0 ∞

(brake pedal depressed)

PA6

Starting switch, start position

PA6 - PA12

0 V (ignition key in DRIVE position) B+ (ignition key in START position)

Measure voltage using multimeter.

PA7

Starting switch, preheating position (II 1 / 2)

PA7 - PA12

0 V (ignition key in DRIVE position) B+ (ignition key in preheat position)

VOLVO only; measure voltage using multimeter.

PA8

Clutch pedal

PA8 - PB19

0 ∞

(clutch pedal depressed)

PA9

not used

PA10

not used

PA11

not used

PA12

Ground connection, VECU

PA12 - ground

0

PA13

Supply voltage, VECU

PA13 - PA12

0V B+ (Connect PB15 to ground)


PA14

Starting switch, drive position

PA14 - PA12

0V B+ (ignition key in DRIVE position)


PA15

not used

PA16

not used

PA17

not used

PA18

not used

PA19

Manual fan switch

PA19 - PA12

0V B+ (manual fan switch ON)

8


D

Connection

Signal type

Measuring points

Expected value

PA20

Exhaust brake, switch VCB / retarder, switch SET+

PA20 - PB5

∞

Exhaust brake, switch EPG / retarder, switch SET-

PA21 - PB5

PA21

Specifications

0 (switch, exhaust brake in position 2 (VCB) or switch retarder, SET+ active) ∞

0 (switch, exhaust brake in position 1 (EPG) or switch retarder, SET-active)

PA22

reserved

PA23


PA23 - PB19

PA24

Air conditioning, status switch

PA24 - PA12

0 (no fan request from A/C) > 100 k (fan requested by A/C)

PA25

not used

PA26

not used

PA27

not used

PA28

not used

PA29

Power Take-Off, PTO switch

PA29 - PA12

0 V (switch OFF) B+ (switch ON)

PA30

Cruise control, RESUME

PA30 - PB5

Other See “Engine Brake Variants” page 13.

See “Engine Brake Variants” page 13.

∞

20 - 90 (accelerator pedal depressed)

VOLVO only

∞

0

(RESUME active)

9


Specifications

VECU, measurement box connected to wiring harness, connector PB

D

Prerequisites: • Measurement box 9998699 and adapter 9998533 connected to connector PB on the wiring harness. Measurement box 9998699 and adapter 9813194 • connected to connector PA on the wiring harness. Ignition key in OFF position (unless otherwise stated • in the table). • Measure resistance using multimeter (unless otherwise stated in the table).

T0008365

B+ = battery voltage Connec tion

Signal type

PB1

not used

PB2

not used

PB3

Idle validation switch signal to EECU (redundant)

PB4

not used

PB5

Voltage supply:

• Switch cruise •

control Switch exhaust brake/retarder (SET+/-)

Measuring points

1 PB5 - PA1

1

2 PB5 - PA2

2

3 PB5 - PA3 4 PB5 - PA20

6 PB5 - PA30

Vehicle speed sensor

Other

Cummins only; no relevant measurement.

5 PB5 - PA21

PB6

Expected value

PB6 - PB20

∞

0

(SET-active)

∞

0

(SET+ active) (OFF) 0 (ON) 4 See “Engine Brake Variants” page 13 5 See “Engine Brake Variants” page 13 6 ∞ 0 (RESUME active) 3

∞

2.0 - 4.0 k

(magnetic VSS)

Verify VSS installed; with auto trans (Autoshift, Lightning, Freedom Line), VECU might receive VSS info over datalink instead.

PB7

not used

PB8

Accelerator pedal, position

PB9

not used

PB10

Voltage supply:

• Accelerator

pedal sensor Engine brake • stalk switch

10

PB8 - PB22¹

1.0 - 2.0 k

(no acceleration)

PB10 - PB22

Measurement at accelerator pedal¹: 3.2 - 4.8 k Measurement at engine brake stalk switch²: 1.7 - 2.5 k (pos 1) 1.3 - 2.0 k (pos 2) 1.1 - 1.7 k (pos 3) 0.9 - 1.4 k (pos 4) 0.8 - 1.2 k (pos 5) 0.7 - 1.1 k (pos 6)

See “Engine Brake Variants” page 13.


Specifications

D

Connec tion

Signal type

Measuring points

Expected value

PB11

Parking brake, status

PB11 - PA12

∞

PB12

not used

PB13

not used

PB14

not used

PB15

Relay, voltage supply

0

Other

(parking brake released) (parking brake applied)

PB15 - PA12

B+ 0 V (ground PB15, and listen for relay clicking sound)

Ignition key in DRIVE position

• VECU, EMS (VOLVO)

• VECU,

(Cummins)

PB16

PTO output

PB16 - PA12

Ignition key in DRIVE position, switch PTO active, connect PB 16 to ground, listen for clicking sound from solenoid valve

VOLVO only

PB17

Buffered idle validation switch

PB17 - PA12

2.3 - 3.5 k

VOLVO only

PB18

not used

PB19

Voltage supply:

1 PB19 - PA5

1 0

2 PB19 - PA8

2 0

•

Pedal switches

3 PB19 - PA23

∞ ∞

3

(brake pedal depressed) (clutch pedal depressed)

∞

20 - 90 (accelerator pedal depressed) PB20

Vehicle speed sensor (-)

PB20 - PB6

2.0 - 4.0 k

(magnetic VSS)

Verify VSS installed; with auto trans (Autoshift, Lightning, Freedom Line), VECU might receive VSS info over datalink instead.

PB21

not used

PB22

Ground connection:

1 PB22 - PB8¹

• Accelerator

2 PB22 - PB10

pedal Engine brake • stalk switch position sensor (Cummins ISX)

PB23

not used

PB24

Engine brake stalk switch position sensor

PB25

not used

PB26

not used

PB24 - PB22²

1 1.0 - 2.0 k (no acceleration) 2 Measurement at accelerator pedal¹: 3.2 - 4.8 k Measurement at engine brake stalk switch²: 1.7 - 2.5 k (pos 1) 1.3 - 2.0 k (pos 2) 1.1 - 1.7 k (pos 3) 0.9 - 1.4 k (pos 4) 0.8 - 1.2 k (pos 5) 0.7 - 1.1 k (pos 6)

1.0 - 1.4 k 0.9 - 1.3 k 0.8 - 1.2 k 0.8 - 1.1 k 0.7 - 1.1 k 0.7 - 1.0 k

(pos 1) (pos 2) (pos 3) (pos 4) (pos 5) (pos 6)

See “Engine Brake Variants” page 13

Cummins EBR-CBJ6 only

11


Specifications

D

Connec tion

Signal type

Measuring points

Expected value

PB27

Brake pressure switch

PB27 - PA12

3.5 V - B+ (brake pedal released) 0 V (brake pedal depressed)

PB28

not used

PB29

not used

PB30

not used

Table Notes 1 2

12

Connector to engine brake stalk switch disconnected. Connector to accelerator pedal disconnected.

Other



Engine Brake Variants EBR Variant

Voltage

Stalk

(A)

(A)

Voltage (A)

Pos

Pos

PA20 -

PA21 -

PB24 - PA12

PA12

PA12

0 V

0 V

0 V

B+

0 V

0 V

0 V

B+

B+

B+

0 V

0 V

0 V

B+

0 V

0 V

OFF

(EBR-EPG)

ON

D12D (EBR-VEB)

n/a

OFF LOW

n/a

HIGH

ISL/ISC

OFF

(EBR-EXH)

ON

n/a

OFF

ISL (EBR-CBJ2)

D

Voltage Switch

D12D

LOW

n/a

n/a

n/a

Resistance

(B)

(B)

PA20 - PB5

PA21 - PB5

∞

∞

∞

0

∞

∞

∞

0

0

0

∞

∞

∞

0

∞

∞

Resistance (B) PB24- PB22 (1)

% EBR (Parameter Code)

n/a

n/a

n/a

n/a

n/a

0 (ATC) 100 (ATD)

B+

∞

0

B+

0 V

0

∞

100 (ATE)

OFF

0 V

0 V

∞

∞

0 (ATC)

LOW MED

n/a

HIGH

B+

0 V

0 V

B+

B+

B+

n/a

0

∞

∞

0

0

0

n/a

n/a

50 (ATD)

33 (ATE) 66 (ATD)

OFF

ANY

0 V

—

∞

ON

1

B+

0.3 - 0.7 V

0

—

(EBR-

ON

2

B+

1.0 - 1.6 V

0

CBJ6; with

ON

3

B+

1.7 - 2.5 V

0

6-position

ON

4

B+

2.3 - 3.5 V

0

0.8 - 1.1 k

67 (ATF)

stalk lever)

ON

5

B+

2.9 - 4.4 V

0

0.7 - 1.1 k

83 (ATG)

ON

6

B+

3.6 - 5.4 V

0

0.7 - 1.0 k

100 (ATH)

n/a

(2)

(2)

(2)

100 (ATF)

ISX

n/a

“Notes” page 13

0 (ATC)

0 V

(EBR-CBJ3)

n/a

Resistance

HIGH

ISX

n/a

Specifications

0

1.0 - 1.4 k

17 (ATC)

0.9 - 1.3 k

33 (ATD)

0.8 - 1.2 k

50 (ATE)

(2) (3)

Notes (A) (B) (1) (2)

Voltage measurements (VECU connected) Resistance measurements (VECU disconnected) Connector to accelerator pedal disconnected Parameter codes ATC through ATH correspond to parameter names CUMMINS_engine brake_SWITCH_POS1 through _POS6, and are used by the VECU to relate engine brake switch input(s) to the requested

engine brake % sent to the engine. These are Level 3 Programmable by the customer using VCADS Pro (with network connection). (3) EBR function is 0% whenever ON/OFF switch is OFF. When ON/OFF switch is ON, EBR function % is determined by stalk position.

13

D

14


Tools

Tools Special Tools

D

The following special tools are used to carry out fault tracing of components. For ordering instructions for special tools, refer to tool information, group 08.

9990014

9990020

9990062

62-pin cable adapter

Cruise control switch adapter

Extension cable (for 9990014)

9990151

9998533

9998534

Adapter between VECU, connector PB, and measurement box

Adapter for DIN connector

9990008

9998699

9998604

Set of testpins

Measurement box 62-unit

Adapter

Adapter, vehicle speed sensor

15


Tools

D 88890016 Accelerator pedal switch

Overlay Part Numbers

85104406

85104407

85104409

Overlay (used with adapter 9998533)



85108489 Overlay (Used with adapter 88890016)

16


Other Special Equipment

J39200 Multimeter

Tools

D 9813194 Adapter between VECU, connector PA, and measurement box 9998699

17

D

18


Troubleshooting

Troubleshooting

D

MID 144 Vehicle Control Unit, Fault Codes MID: Message Identification Description (identification of control unit). PID: Parameter Identification Description (identification of parameter (value)). PPID: Proprietary Parameter Identification Description (Volvo unique identification of parameter (value)). Fault code

SID: Subsystem Identification Description (identification of component). PSID: Proprietary Subsystem Identification Description (Volvo unique identification of component). FMI: Failure Mode Identifier (identification of error type).

Component

FMI

MID 144 PID 84

Vehicle speed

2, 5, 6

“MID 144 PID 84 Vehicle Speed” page 21

MID 144 PID 91

Accelerator pedal, percentage position

3, 4

“MID 144 PID 91 Accelerator Pedal Position (Percentage)” page 27

MID 144 PID 150

PTO output (Volvo only)

4

“MID 144 PID 150 PTO Output” page 32

MID 144 PID 152

VECU, number of resets

12

“MID 144 PID 152 VECU, Number of Resets” page 36

MID 144 PID 191

Output shaft speed

2, 5, 6

“MID 144 PID 191 Output Shaft Speed” page 37

MID 144 PPID 61

Retarder switches (Volvo only)

7

“MID 144 PPID 61 Engine Brake Switch” page 44

MID 144 PPID 69

Buffered idle validation switch (Volvo only)

4

“MID 144 PPID 69 Buffered Idle Validation Switch” page 48

MID 144 PPID 70

Pedal switches, supply

4

“MID 144 PPID 70 Pedal Switches, Supply” page 51

MID 144 PPID 71

Cruise control and engine brake, switch supply

4

“MID 144 PPID 71 Cruise Control and Engine Brake, Switch Supply” page 58

MID 144 PPID 72

Accelerator pedal and engine brake, sensors supply

3, 4

“MID 144 PPID 72 Accelerator Pedal and Engine Brake, Sensors Supply” page 68

MID 144 PPID 74

VECU power supply

3, 4

“MID 144 PPID 74 VECU Power Supply” page 76

MID 144 SID 230


7

“MID 144 SID 230 Idle Validation Switch 1” page 79

MID 144 SID 231

Control link SAE J1939

2

“MID 144 SID 231 J1939 Control Link” page 82

MID 144 SID 240

Program memory

2

“MID 144 SID 240 Program Memory” page 83

MID 144 SID 243

Cruise control, set switch

7

“MID 144 SID 243 Cruise Control Set Switch” page 84

MID 144 SID 250

Information link SAE J1708

2

“MID 144 SID 250 J1587/J1708 Information Data Link” page 88

MID 144 SID 253

Calibration memory EEPROM

2, 13

“MID 144 SID 253 Calibration Memory EEPROM” page 89

MID 144 PSID 4

Engine brake stalk lever (Cummins EBR-CBJ6 only)

3, 4

“MID 144 PSID 4 Engine Brake Stalk Lever” page 90

MID 144 PSID 200

Engine timeout

9

“MID 144 PSID 200 Data Link, Engine Control Unit” page 95

MID 144 PSID 202

Instrument timeout

9

“MID 144 PSID 202 Data Link, Instrument Control Unit” page 96

MID 144 PSID 204

ABS/EBS timeout

9

“MID 144 PSID 204 Data Link, Brake Control Unit” page 97

Section

19


Fault code

Troubleshooting

D

Component

FMI

MID 144 PSID 210

LCM timeout

9

“MID 144 PSID 210 J1939 Control Data Link Interruption, Lighting Control Module (LCM) ” page 98

MID 144 PSID 214

BBM timeout (VOLVO only, vehicles equipped with BBM)

9

“MID 144 PSID 214 Data Link, Bodybuilder Control Unit” page 99

FMI Table SAE standard FMI

Display text

Section

SAE text

0 Value too high

Data valid, but above normal operating range.

1 Value too low

Data valid, but under normal operating range

2

Incorrect data

Intermittent or incorrect data.

3

Electrical faults

Abnormally high voltage or short circuit to higher voltage.

4

Electrical faults

Abnormally low voltage or short circuit to lower voltage.

5 Electrical faults

Abnormally low current or open circuit.

6

Abnormally high current or short circuit to ground.

Electrical faults

7 Mechanical fault

Incorrect response from mechanical system.

8

Abnormal frequency.

Mech. or electrical faults

9 Communication fault

20

Abnormal updating rate.

10

Mech. or electrical faults

Abnormally large variations.

11

Unknown fault

Unidentifiable error.

12 Component fault

Faulty unit or component.

13

Incorrect calibration

Calibration values outside the limits.

14

Unknown fault

Special instr uctions.

15

Unknown fault

Reser ved for future use.


MID 144 PID 84 Vehicle Speed

Troubleshooting

D

W3006058

W3006059

General The Vehicle Speed Signal arrives at the VECU from one of three sources, depending on vehicle / transmission configuration:

• Eaton-type Vehicle Speed Sensor (VSS) • Automated Transmission without extra sensor • Allison Transmission In all cases, the origin of the Vehicle Speed Signal is a VSS sensor in the output shaft (tailshaft) of the transmission.

Component: A17, VECU; B68 speedometer sensor.

21


Fault code

Troubleshooting

D

FMI 2

FMI 6


Abnormally high current or short circuit.

Conditions for fault code: • The VECU can receive vehicle speed information over the J1939 Control Data Link from certain transmissions. This FMI will occur if the VECU is expecting such data but does not receive it.

Conditions for fault code: • If the VECU registers a current higher than 140 µA on any of the signal wires from the speed sensor, the VECU interprets this as a fault and a fault code is set.

Note: First read and correct fault codes from the transmission ECU, if applicable. Possible cause: • Fault in wiring harness, control link. • Fault in vehicle speed sensor or VSS wiring to transmission ECU.

Possible cause:

• • • •

Signal wire short-circuited to higher voltage. Signal wire short-circuited to ground. Signal wires short-circuited to each other. Fault in sensor.

Reaction from VECU: • Fault code is set. • Yellow lamp is requested.

Reaction from the VECU:

Noticeable external symptom: • Yellow lamp lights up. • No vehicle speed in gauge. • No PTO or cruise control.

Noticeable external symptom:

Action: • Troubleshoot J1939 Control Data Link; refer to Service Information, group 37. • “MID 144 PID 84 Vehicle Speed, Check” page 23.

FMI 5 Abnormally low current or open circuit. Conditions for fault code: • If the VECU registers a current lower than 90 µA on any of the signal wires from the speed sensor the VECU interprets this as a fault and a fault code is set. Possible cause:

• • • •

Poor contact, sensor connection. Switch resistance and oxidation. Break, signal wire. Fault in sensor.


•

Yellow lamp lights up.


• No vehicle speed on gauge. • No PTO. • No cruise control. Action:

•

22

“MID 144 PID 84 Vehicle Speed, Check” page 23.

•



•

Troubleshoot J1939 Control Data Link; refer to Service Information, group 37.

•

“MID 144 PID 84 Vehicle Speed, Check” page 23.


Troubleshooting

3649-21-03-08 MID 144 PID 84 Vehicle Speed, Check

D

Special tools: 9990151, 9998533, 9998699 Other special equipment: J39200

NOTE! fault codes for the VECU, VECU, • Read off the other fault • •

speedometer, and brake control unit. Switch Switch off the current current in the vehicle vehicle before the connectors are disconnected. Check for loose connections, connections, switch resistance, resistance, and oxidation. For information concerning fault tracing of wires and connectors, refer to Service Information, group 37.

Tests Using PC Tool The following tests are useful for closely examining the component’s function:

•

“Cruise control switch, switch, test”

The test allows you to read the speed signal from the VECU.

Determination of Vehicle Speed Sensor Configuration The appropriate check of the system will depend on the configuration of the Vehicle Speed sensor and circuits. Use the following information to determine which system the vehicle has:

•

Eaton-Type Eaton-Type Vehicle Speed Sensor Use this check whenever FMI 5 or 6 is present. This type of Vehicle Speed Sensor (VSS) will be found on the tailshaft of manual transmissions. It may also be found on some automated transmissions (Eaton Autoshift, Eaton Lightning) when two VSS are present in the tailshaft - one VSS will be wired directly to the Transmission ECU, the other will be wired to the VECU (circuits 550/551).

•

Automated Transmission Transmission without Extra Sensor If only one VSS is found on an automated transmission (Eaton Autoshift, Eaton Lightning) the VECU is receiving Outputshaft Outputshaft Speed information from the Transmission ECU over the J1939 datalink. All Meritor / ZF FreedomLine transmissions fall into this category.

• Allison Transmission Use this section if the vehicle is equipped with an Allison MD or HD transmission.

23


Troubleshooting

Measurement at component connector to VECU

D

Note: Faults in the wiring harness to the VECU can damage the component. component. Therefore Therefore,, a check of the component should also be made if any of the measurement values deviate.

•

Eaton-type Vehicle Vehicle Speed Sensor (VSS)

For this type of VSS, 3 checks can be performed: 1 Prerequisites:

• • • •

Ignition key in OFF position. Measurement Measurement box inserted at VECU VECU (disconnected at VECU side). Vehicle Vehicle Speed Sensor Sensor at transmission connected. Measure resistance, harness side of PB6 – PB20, “looking toward” VSS.

• Measuring points

Expected value

PB6 - PB20

2. 0 - 4. 0 k 2 Prerequisites:

• • • •

Ignition key in OFF position. Measurement Measurement box inserted at VECU VECU (disconnected at VECU side). Vehicle Vehicle Speed Sensor at transmission transmission disconnected. Make sure PB6 PB6 and PB20 PB20 are are not shorted shorted to ground, power, or each other.


Expected value

PB6 - PB20

OL

PB6 - ground

OL

PB20 - ground

OL 3 Prerequisites:

• • • • •

Ignition key in ON position. Measurement box inserted at VECU (connected at VECU). Vehicle Vehicle Speed Sensor Sensor at transmission connected. Vehicle Vehicle must be stationary. stationary. Measure Measure voltage voltage across across PB6 – PB20. PB20.

Measuring points

Expected value

PB6 - PB20

1.25 - 1.75 Vdc (average) varying varying between approx. approx. 1.0 and 2.0 V

24


Troubleshooting

D •

Automated Transmission Transmission without Extra Sensor 1

If two two Vehi Vehicle cle Speed Speed Sens Sensors ors (VSS) (VSS) are are prese present nt in the transmission’s tailshaft and the PID 84 fault code set by the VECU is FMI 5 or 6, use the troubleshooting for the Eaton-type Vehicle Speed Sensor (above).

2

If only only one one VSS VSS is presen presentt in the tail tailsha shaft ft (or (or ifif none are visible, as is the case with the Meritor / ZF FreedomLine), then the VECU is receiving its information over the J1939 Control Data Link. Another Another way to tell that the VECU is receiving the information over the Data Link is by the FMI that the VECU is using. For example example,, if the fault code is PID 84 FMI 2, this indicates that the VECU is expecting the data over the J1939 Control Data Link but is not receiving it.

3

In tthese hese cases, cases, troubl troubleshoo eshoott an any y fault fault codes in the transmission ECU first. If the trouble remains, refer to troubleshooting information for the SAE J1939 Control Data Link, group 37.

• Allison Transmission 1

The Vehicle ehicle Speed Speed inf informa ormatio tion n from from Alli Allison son Transmissions can be obtained one of two ways:

•

A hardwire hardwire connection from the Allison ECU (Black connector, pin 30, circuit A215) to the VECU (PB6, circuit 550). This signal is a square-wave reproduction of the VSS located in the Allison’s tailshaft.

•

Over the J1939 Control Data Link. (NOTE: even if obtaining the information over the Data Link, the hardwire connection may still be in place.) In either case, troubleshoot any fault codes in the Allison transmission ECU first.

2

If the the PID PID 84 84 faul faultt code code in in the the VECU VECU is is FMI FMI 2, this this indicates that the VECU is configured to receive the VSS information over the J1939 Control Data Link. If the problem remains, remains, refer to troubleshooting information for the SAE J1939 Control Data Link, group 37.

3

If FMI 2 is not not indicated, indicated, or there there are no fault fault codes codes present in the VECU but a speed-related problem still exists, troubleshoot the hardwire connection between the Allison Transmission ECU and the VECU. Refer to Service Information, group 37.

25


Troubleshooting

Check of Component

D

Note: Faults in the component can be caused by faults in the wiring harness of the control unit. Therefore, a check of the wiring harness should also be made before connecting a new component.

•

Eaton-Type Vehicle Speed Sensor (VSS)

For the Eaton-type VSS, one check can be performed at the VSS:

Prerequisites: • Vehicle Speed Sensor at transmission disconnected. • Measure resistance of sensor using tool 9990151. Measuring points

Expected value

A-B

2.0 - 4.0 k

•

Automated Transmission without Extra Sensor

No relevant measurements; refer to the appropriate service literature for the transmission manufacturer.

• Allison Transmission No relevant measurements; refer to the appropriate service literature for the transmission manufacturer.

Verification Using the PC tool, check that the fault has been corrected (see “Tests Using PC Tool” page 23).

26


Troubleshooting

MID 144 PID 91 Accelerator Pedal Position (Percentage)

D

W3006772

W3006776

General Information Component: B25 sensor, accelerator pedal; A17, VECU

Fault Codes FMI 3

FMI 4



Conditions for fault code: • If the VECU receives a signal from the sensor that is higher than 4.3 V, the control unit interprets this as a fault and a fault code is set.

Conditions for fault code: • If the VECU receives a signal from the sensor that is lower than 0.4 V, the control unit interprets this as a fault and a fault code is set.

Possible cause: • Open circuit, ground cable. • Signal wire short-circuited to higher voltage. • Faulty sensor. • Idle switch 1 faulty. • Switch resistance and oxidation.

Possible cause: • Open circuit, supply cable. • Open circuit, signal cable. • Signal wire short-circuited to ground. • Faulty sensor. • Switch resistance and oxidation.



Noticeable external symptom: • Yellow lamp lights up. • Engine/system does not respond to full acceleration.

Noticeable external symptom: • Yellow lamp lights up. • Engine/system does not respond to full acceleration.

Action: • “MID 144 PID 91 Accelerator Pedal Position (Percentage), Check” page 28.

Action: • “MID 144 PID 91 Accelerator Pedal Position (Percentage), Check” page 28.

27


Troubleshooting

3649-21-03-09 MID 144 PID 91 Accelerator Pedal Position (Percentage), Check

D

Special tools: 85108489, 9998533, 85104406, 88890016, 9998699 Other special equipment: J39200

NOTE! • Read off the other fault codes for the VECU. • Switch off the current in the vehicle before the connectors are disconnected.

•

Check for loose connections, switch resistance, and oxidation. For information concerning fault tracing of wires and connectors, refer to Service Information, group 37.

Tests Using PC Tool The following tests are useful to check component function:

• •

Accelerator pedal switches and sensors, test MID 144, pinout test

Measurement at the component’s connector to VECU Note: Faults in the wiring harness to the VECU can damage the component. Therefore, a check of the component should also be made if any of the measurement values deviate.

Ground wire 1 Prerequisites: • Connector to the accelerator pedal sensor disconnected. Connector to engine brake switch disconnected (if • equipped). Measure resistance using multimeter. • • VECU connected. • Ignition key in OFF position. • Measurement to the VECU. Measuring points

Expected value

4 - alt ground

0

88890016 , 85108489 J39200

28


Troubleshooting

Supply wire

D 2

Prerequisites: • Connector to the accelerator pedal sensor disconnected. Connector to engine brake switch disconnected (if • equipped). • Measure voltage using multimeter. • VECU connected. • Ignition key in DRIVE position. • Measurement to the VECU.

Measuring points

Expected value

6-4

4.3 - 6.5 V

88890016 , 85108489 J39200

Signal wire 3 Prerequisites: • Connector to the accelerator pedal sensor disconnected. Connector to engine brake switch disconnected (if • equipped). Measure resistance using multimeter. • • VECU connected. • Ignition key in OFF position. • Measurement to the VECU. Measuring points

Expected value

5-4

80 - 120 k

88890016 , 85108489 J39200

Wiring harness 4 Check the wiring harness; refer to Service Information, group 37.

29


Troubleshooting

Check of component

D


Accelerator pedal sensor 1

Prerequisites: • Connector to the accelerator pedal sensor disconnected. • Measurement box with adapter connected to the accelerator pedal sensor. • Measure resistance using multimeter. • Ignition key in OFF position. • Measurement at the accelerator pedal sensor. Measuring points

Expected value

6-4

3.2 - 4.8 k

6-5

1.0 - 2.0 k

(no acceleration)

88890016 , 85108489 J39200

Check of subsystem Ground wire 1 Prerequisites: • Measurement box with adapter connected between VECU connector PB (blue) and wiring harness. Measuring the resistance using the multimeter. • • VECU connected. • Ignition key in OFF position. Measuring points

Expected value

PB22 - ground

0

9998533 , 85104406 , 9998699 J39200

30


Troubleshooting

Supply wire

D 2

Prerequisites: • Measurement box with adapter connected between VECU connector PB (blue) and wiring harness. Measure voltage using multimeter. • VECU connected. • • Ignition key in DRIVE position.

Measuring points PB10 - PB22

Expected value

4-6V

9998533 , 85104406 , 9998699 J39200

Signal wire 3 Prerequisites: • Measurement box with adapter connected between VECU connector PB (blue) and wiring harness. Measure voltage using multimeter. • • VECU connected. • Ignition key in DRIVE position. Measuring points

Expected value

PB8 - PB22

0.4 - 0.6V (no acceleration) 2.6 - 3.8 V (full acceleration)

9998533 , 85104406 , 9998699 J39200

Verification Using the PC tool, check that the fault has been corrected (see “Tests Using PC Tool” page 28 ).

31


MID 144 PID 150 PTO Output (Volvo engines only)

Troubleshooting

D W3005531

W3005549

General Information Note: Parameters are set by bodybuilders in aftermarket. Component: A17, VECU; K07 relay, PTO; S28 dash switch, PTO; Y18A solenoid, PTO.

Fault code FMI 4 Abnormally low voltage or short circuit to lower voltage. Conditions for fault code: • If the VECU registers a voltage lower than 2.3 V when the function is inactive, the control unit interprets this as a fault and a fault code is set. Possible cause: • Open circuit, supply cable forward to relay. • Cable between relay and control unit short-circuited to ground. Open circuit, cable between relay and control unit. • • Faulty relay. • Switch resistance and oxidation. Reaction from VECU: • Fault code is set. • Yellow lamp is requested. Noticeable external symptom: • Yellow lamp lights up. Action: • “MID 144 PID 150 PTO Output, Check” page 34 .

32


General Information Note: Parameters are set by bodybuilders in aftermarket. Component: A17, VECU; K07 relay, PTO; S28 dash switch, PTO; Y18A solenoid, PTO.

Fault code FMI 4 Abnormally low voltage or short circuit to lower voltage. Conditions for fault code: • If the VECU registers a voltage lower than 2.3 V when the function is inactive, the control unit interprets this as a fault and a fault code is set.

Troubleshooting

D

Possible cause: • Open circuit, supply cable forward to relay. • Cable between relay and control unit short-circuited to ground. • Open circuit, cable between relay and control unit. • Faulty relay. • Switch resistance and oxidation. Reaction from VECU: • Fault code is set. • Yellow lamp is requested. Noticeable external symptom: • Yellow lamp lights up. Action: • “MID 144 PID 150 PTO Output, Check” page 34.

33


Troubleshooting

3649-21-03-01 MID 144 PID 150 PTO Output, Check

D

(Volvo engines only)

Special tools: 9998533, 9998699 Other special equipment: J39200


•


Measurement at component connector to VECU Note: Faults in the wiring harness to the VECU can damage the component. Therefore, a check of the component should also be made if any of the measurement values deviate.

Ground wire 1 Prerequisites: • Connector to relay K07 removed. • Adapter connected to the VECU. • Measure resistance using multimeter. • VECU connected. • Ignition key in OFF position. • Measurement to the VECU. Measuring points

Expected value

PB16 - ground

3.4 M

998533 , 9998699 J39200


34


Troubleshooting

Check of component

D


Relay 1

Prerequisites: • Measurement box with adapter connected between VECU connector PB and wiring harness. • Ignition key in DRIVE position. • Switch PTO active. • Check of the solenoid valve.

Earth PB16 - ground

Checks Listen for sound from the relay

9998533 , 9998699 J39200

Check of subsystem Ground wire 1 Prerequisites: • Measurement box with adapter connected between VECU connector PB and wiring harness. Measure voltage using multimeter. • VECU connected. • • Ignition key in DRIVE position. • Switch PTO active. Measuring points

Expected value

PB16 - PB19

B+ (relay inactive) 0 V (relay active)

9998533 , 9998699 J39200

35


MID 144 PID 152 VECU, Number of Resets

D

W3005048

General Information The software in the VECU contains an internal checking function that restarts the control unit when there is a fault in the execution of the software. PID 152 contains information about how many such restarts that have been made.

Component: A17, VECU.

Fault code FMI 12 Faulty unit or component. Conditions for fault code: • If an internal software fault occurs an info code is set. Possible cause: • The system has been restarted due to an internal software fault. Reaction from VECU: • Fault code is set. • The system is restarted.

36

Troubleshooting


Troubleshooting

MID 144 PID 191 Output Shaft Speed

D

W3006058

W3006059

General The Output Shaft Speed Signal arrives at the VECU from one of three sources, depending on vehicle / transmission configuration:

• Eaton-type Vehicle Speed Sensor (VSS) • Automated Transmission without extra sensor • Allison Transmission In all cases, the origin of the Output Shaft Speed Signal is a VSS sensor in the output shaft (tailshaft) of the transmission.

Component: A17, VECU; B68 speedometer sensor.

37


Fault code FMI 2 Intermittent or incorrect data. Conditions for fault code: • The VECU can receive vehicle speed information over the J1939 Control Data Link from certain transmissions. This FMI will occur if the VECU is expecting such data but does not receive it.

Note: First read and correct fault codes from the transmission ECU, if applicable. Possible cause: • Fault in wiring harness, control link. • Fault in vehicle speed sensor or VSS wiring to transmission ECU. Reaction from VECU: • Fault code is set. • Yellow lamp is requested. Noticeable external symptom: • Yellow lamp lights up. • No vehicle speed in gauge. • No PTO or cruise control. Action: • Troubleshoot J1939 Control Data Link; refer to Service Information, group 37. • “MID 144 PID 191 Output Shaft Speed, Check” page 40.

FMI 5 Abnormally low current or open circuit. Conditions for fault code: • If the VECU registers a current lower than 90 µA on any of the signal wires from the speed sensor the VECU interprets this as a fault and a fault code is set. Possible cause:

• • • •

Poor contact, sensor connection. Switch resistance and oxidation. Break, signal wire. Fault in sensor.


•




•

38

“MID 144 PID 191 Output Shaft Speed, Check” page 40.

D

Troubleshooting


FMI 6 Abnormally high current or short circuit. Conditions for fault code: • If the VECU registers a current higher than 140 µA on any of the signal wires from the speed sensor, the VECU interprets this as a fault and a fault code is set. Possible cause:

• • • •

Signal wire short-circuited to higher voltage. Signal wire short-circuited to ground.

Troubleshooting

D

Signal wires short-circuited to each other. Fault in sensor.


•



• • •

No vehicle speed on gauge. No PTO. No cruise control.

Action:

•

Troubleshoot J1939 Control Data Link; refer to Service Information, group 37.

•

“MID 144 PID 191 Output Shaft Speed, Check” page 40.

39


Troubleshooting

3649-21-03-28 MID 144 PID 191 Output Shaft Speed, Check

D


NOTE! • Read off the other fault codes for the VECU, • •

speedometer, and brake control unit. Switch off the current in the vehicle before the connectors are disconnected. Check for loose connections, switch resistance, and oxidation. For information concerning fault tracing of wires and connectors, refer to Service Information, group 37.


•

“Cruise control switch, test”

The test allows you to read the speed signal from the VECU.

Determination of Output Shaft Speed Sensor Configuration The appropriate check of the system will depend on the configuration of the Vehicle Speed sensor and circuits. Use the following information to determine which system the vehicle has:

•

Eaton-Type Vehicle Speed Sensor Use this check whenever FMI 5 or 6 is present. This type of Vehicle Speed Sensor (VSS) will be found on the tailshaft of manual transmissions. It may also be found on some automated transmissions (Eaton Autoshift, Eaton Lightning) when two VSS are present in the tailshaft - one VSS will be wired directly to the Transmission ECU, the other will be wired to the VECU (circuits 550/551).

•

Automated Transmission without Extra Sensor If only one VSS is found on an automated transmission (Eaton Autoshift, Eaton Lightning) the VECU is receiving Outputshaft Speed information from the Transmission ECU over the J1939 datalink. All Meritor / ZF FreedomLine transmissions fall into this category.

•

Allison Transmission Use this section if the vehicle is equipped with an Allison MD or HD transmission.

40


Troubleshooting

Measurement at component connector to VECU

D

Note: Faults in the wiring harness to the VECU can damage the component. Therefore, a check of the component should also be made if any of the measurement values deviate.

•

Eaton-type Vehicle Speed Sensor (VSS)

For this type of VSS, 3 checks can be performed: 1 Prerequisites:

• • • •

Ignition key in OFF position. Measurement box inserted at VECU (disconnected at VECU side). Vehicle Speed Sensor at transmission connected. Measure resistance, harness side of PB6 – PB20, “looking toward” VSS.


Expected value

PB6 - PB20

2.0 - 4.0 k 2 Prerequisites:

• • • •

Ignition key in OFF position. Measurement box inserted at VECU (disconnected at VECU side). Vehicle Speed Sensor at transmission disconnected. Make sure PB6 and PB20 are not shorted to ground, power, or each other.


Expected value

PB6 - PB20

OL

PB6 - ground

OL

PB20 - ground

OL 3 Prerequisites:

• • • • •

Ignition key in ON position. Measurement box inserted at VECU (connected at VECU). Vehicle Speed Sensor at transmission connected. Vehicle must be stationary. Measure voltage across PB6 – PB20.

Measuring points

Expected value

PB6 - PB20

1.25 - 1.75 Vdc (average) varying between approx. 1.0 and 2.0 V

41


Troubleshooting

D

•

Automated Transmission without Extra Sensor 1

If two Vehicle Speed Sensors (VSS) are present in the transmission’s tailshaft and the PID 191 fault code set by the VECU is FMI 5 or 6, use the troubleshooting for the Eaton-type Vehicle Speed Sensor (above).

2

If only one VSS is present in the tailshaft (or if none are visible, as is the case with the Meritor / ZF FreedomLine), then the VECU is receiving its information over the J1939 Control Data Link. Another way to tell that the VECU is receiving the information over the Data Link is by the FMI that the VECU is using - if the fault code is PID 191 FMI 2, this indicates that the VECU is expecting the data over the J1939 Control Data Link but is not receiving it.

3

In these cases, troubleshoot any fault codes in the transmission ECU first. If the trouble remains, refer to troubleshooting information for the SAE J1939 Control Data Link, group 37.

• Allison Transmission 1

The Output Shaft Speed information from Allison Transmissions will be obtained one of two ways:

•

A hardwire connection from the Allison ECU (Black connector, pin 30, circuit A215) to the VECU (PB6, circuit 550). This signal is a square-wave reproduction of the VSS located in the Allison’s tailshaft.

•

Over the J1939 Control Data Link. (NOTE: even if obtaining the information over the Data Link, the hardwire connection may still be in place.) In either case, troubleshoot any fault codes in the Allison transmission ECU first.

42

2

If the PID 191 fault code in the VECU is FMI 2, this indicates that the VECU is configured to receive the VSS information over the J1939 Control Data Link. If the problem remains, refer to troubleshooting information for the SAE J1939 Control Data Link, group 37.

3

If FMI 2 is not indicated, or there are no fault codes present in the VECU but a speed-related problem still exists, troubleshoot the hardwire connection between the Allison Transmission ECU and the VECU. Refer to Service Information, group 37.


Troubleshooting

Check of Component

D


•

Eaton-Type Vehicle Speed Sensor (VSS)

For the Eaton-type VSS, one check can be performed at the VSS:

Prerequisites: • Vehicle Speed Sensor at transmission disconnected. • Measure resistance of sensor using tool 9990151.

Measuring points

Expected value

A-B

2.0 - 4.0 k

•

Automated Transmission without Extra Sensor

No relevant measurements; refer to the appropriate service literature for the transmission manufacturer.

• Allison Transmission No relevant measurements; refer to the appropriate service literature for the transmission manufacturer.


43


Troubleshooting

MID 144 PPID 61 Engine Brake Switch

D


W3005532

W3005545

General Information Component: A17, VECU; S07, engine brake switch, selector type. EPG 2-position Volvo Engine Brake (OFF/ON) VEB 3-position Volvo Engine Brake (OFF/50%/100%)

Fault code FMI 7 Incorrect response from mecanical system. Conditions for fault code: • If the VECU receives signals for PA20 active and PA21 inactive at the same time, the control unit will interpret it as a fault and a fault code will be set. Possible cause: • Faulty switch. • Fault in wiring harness. Reaction from VECU: • Fault code is set. • Yellow lamp is requested. Noticeable external symptom: • Engine brake cannot be activated. • Yellow lamp lights up. Action: • “MID 144 PPID 61 Engine Brake Switch, Check” page 45.

44


Troubleshooting

3649-21-03-04 MID 144 PPID 61 Engine Brake Switch, Check

D

Special tools: 9990008, 9998699 Other special equipment: 9813194, J39200

NOTE! • Read off the other fault codes for the VECU. • Switch off the current in the vehicle before the •

connectors are disconnected. Check for loose connections, switch resistance, and oxidation. For information concerning fault tracing of wires and connectors, refer to Service Information, group 37.

Tests Using PC Tool The following tests are useful for checking component function:

• •

Exhaust brake function, test MID 144, pinout test


Signal wire, engine brake switch 1 Note: The check below applies only to vehicles equipped with Volvo Engine Brake. Prerequisites: • Connector to engine brake switch disconnected. • Measure resistance using multimeter. • VECU connected. • Ignition key in OFF position. • Measurement to the VECU. Measuring points

Expected value

5 - ground

2.1 - 3.1 k

(VCB)

6 - ground

2.1 - 3.1 k

(EPG)

9990008 J39200


45


Troubleshooting

Check of component

D

Note: Faults in the component can be caused by faults in the wiring harness of the control unit. Therefore, a check of the component should also be made before connecting a new component.

Check of engine brake switch 1 Note: The check below applies only to vehicles equipped with Volvo Engine Brake (EBR-VEB). Prerequisites: • Connector to switch, for engine brake disconnected. • Measure resistance using multimeter. • Ignition key in OFF position. • Measurement at switch for engine brake. Measuring points

Expected value

1-6

∞

0 0 1-5

(EPG inactive) (EPG active) (VCB active, if the vehicle is equipped with VCB)

(VCB and EPG inactive, if the vehicle is equipped with VCB) 0 (VCB active, if the vehicle is equipped with VCB) ∞

9990008 J39200

46


Troubleshooting

Check of subsystem

D

Signal wire, engine brake switch 1 Note: The check below applies only to vehicles equipped with Volvo Engine Brake (EBR-VEB). Prerequisites: • Measurement box with adapter connected between VECU connector PA and wiring harness. • Measure voltage using multimeter. • VECU connected. • Ignition key in DRIVE position.

Measuring points

Expected value

PA21 - PA12

0 V (EPG inactive) B+ (EPG active) B+ (VCB active, if the vehicle is equipped with VCB)

PA20 - PA12

0 V (VCB and EPG inactive, if the vehicle is equipped with VCB) B+ (VCB active, if the vehicle is equipped with VCB)

9998699 , 9813194 J39200


47


Troubleshooting

MID 144 PPID 69 Buffered Idle Validation Switch

D


W3005546

W3005533

General Information The function is used to be able to drive the vehicle at increased idling speed if a fault has occurred in the data links to the engine ECU.

Component: A14, EECU; A17, VECU.

Fault code FMI 4 Abnormally low voltage or short circuit to lower voltage. Conditions for fault code: • If the output signal from the buffered idle validation switch deviates from the input signal from idle switch 1, the control unit interprets this as a fault and a fault code is set.

Note: The fault code is set first when the accelerator pedal is depressed. Possible cause: • Signal cable short-circuited to ground. Reaction from VECU: • Fault code is set. • Yellow lamp is requested. Noticeable external symptom: • Yellow lamp lights up. Action: • “MID 144 PPID 69 Buffered Idle Validation Switch, Check” page 49.

48


Troubleshooting

3649-21-03-10 MID 144 PPID 69 Buffered Idle Validation Switch, Check

D


Special tools: 9990014, 9990062, 9998533, 9998699 Other special equipment: J39200




Signal cable 1 Prerequisites: • EECU’s connector disconnected. • Measurement box connected to the VECU. • Measure voltage using multimeter. • VECU connected. • Ignition key in DRIVE position. • Measurement at the VECU. Measuring points

Expected value

EB15 - ground

0 V (no acceleration) B+ (full acceleration)

9990014 , 9990062 J39200


49


Troubleshooting

Check of component

D


Buffered idle validation switch 1

Prerequisites: • EECU connector disconnected. • Measurement box connected to the EECU. • Measure resistance using multimeter. • Ignition key in OFF position. • Measurement at the EECU. Measuring points

Expected value

EB15 - EB59

2.3 - 3.5 k

9990014 , 9990062 J39200

Check of subsystem Note: If measurement box 9990014 (with adapter 9990062) is already connected to connector EB at the EECU, the check can more simply be carried out from here. Connect the measurement box between EECU connector EB and wiring harness. Connect a multimeter to the measurement box and measure the voltage (EB4 EB9). See the expected values below.

Signal cable 1 Prerequisites: • Measurement box with adapter connected between VECU connector PB and wiring harness. Measure voltage using multimeter. • • VECU connected. • Ignition key in DRIVE position. Measuring points

Expected value

PB17 - PB22


9998533 , 9998699 J39200

50


Troubleshooting

MID 144 PPID 70 Pedal Switches, Supply

D

W3006774

W3006777

General Information Voltage supply to pedal switches.

Note: If vehicle is not equipped with a clutch pedal, clutch switch (S58) may be replaced with a jumper wire from the factory. Leave jumper wire in place and perform troubleshooting on circuit as if clutch switch were installed (with switch closed). Component: A17, VECU; S58, position switch, clutch pedal; S59, position switch, brake pedal; B25, sensor, accelerator pedal.

Fault code FMI 4 Abnormally low voltage or short circuit to ground. Conditions for fault code: • If the VECU registers a voltage lower than 3.0 V on the supply cable, the control unit interprets this as a fault and a fault code is set. Possible cause: • Supply wire short-circuited to ground. • Signal wire for idle switch 1 short-circuited to ground. • Signal wire for brake switch short-circuited to ground. • Signal wire for clutch switch (if the vehicle is equipped with clutch pedal) short-circuited to ground. • Faulty switch. Reaction from VECU: • Fault code is set. • Yellow lamp is requested. Noticeable external symptom: • Yellow lamp lights up. Action: • “MID 144 PPID 70 Pedal Switches, Supply, Check” page 52.

51


Troubleshooting

3649-21-03-11 MID 144 PPID 70 Pedal Switches, Supply, Check

D

Special tools: 88890016, 9998533, 9990008, 9998699 Other special equipment: 9813194, J39200


•



• • •

Accelerator pedal switches and sensors, test Cruise control switch, test MID 144, pinout test


Supply wire, idle validation switch 1 1 Prerequisites: • Connector to the accelerator pedal sensor disconnected. • Adapter connected to accelerator pedal. • The following other pedal connectors disconnected:

• •

Brake pedal switch (two sockets). Clutch pedal switch (if equipped with clutch pedal). • Measure voltage using multimeter. • VECU connected. • Ignition key in DRIVE position. • Measurement to the VECU.

Measuring points

Expected value

3 - ground

B+

88890016 J39200

52


Troubleshooting

Signal wire, idle validation switch 1

D 2

Prerequisites: • Connector to the accelerator pedal sensor disconnected. Measurement box with adapter connected to the • VECU. • Measure resistance using multimeter. • VECU connected. • Ignition key in OFF position. • Measurement to the VECU.

Measuring points

Expected value

1 (common) - ground

2.1 - 3.1 k

88890016 J39200

Supply wire, brake pedal switch 3 Prerequisites: • Connector to the brake pedal switch (two sockets) disconnected. • The following other pedal connectors disconnected:

• •

Accelerator pedal sensor. Clutch pedal switch (if equipped with clutch pedal). Measure voltage using multimeter. • • VECU connected. • Ignition key in DRIVE position. • Measurement to the VECU.

Measuring points

Expected value

C (common) - ground

B+

9990008 J39200

Signal wire, brake pedal switch 4 Prerequisites: • Connector to the brake pedal switch (two sockets) disconnected. Measure resistance using multimeter. • • VECU connected. • Ignition key in OFF position. • Measurement to the VECU. Measuring points

Expected value

NO (normally open) - ground

2.1 - 3.1 k

9990008 J39200

53


Troubleshooting

Supply wire, clutch pedal switch

D

5

Prerequisites: • Connector to the clutch pedal switch (two sockets) disconnected (if the vehicle is equipped with clutch pedal). The following other pedal connectors disconnected: •

• •

Accelerator pedal sensor. Brake pedal switch (two sockets). Measure voltage using multimeter. • VECU connected. • • Ignition key in DRIVE position. • Measurement to the VECU.

Measuring points

Expected value

C (common) - ground

B+

9990008 J39200

Signal wire, clutch pedal switch 6 Prerequisites: • Connector to the clutch pedal switch (two sockets) disconnected (if equipped with clutch pedal). • Measure resistance using multimeter. • VECU connected. • Ignition key in OFF position. • Measurement to the VECU. Measuring points

Expected value

NO (normally open) - ground

2.1 - 3.1 k

9990008 J39200


Check of component Note: Faults in the component can be caused by faults in the wiring harness of the control unit. Therefore, a check of the wiring harness should also be made before connecting a new component.

54


Troubleshooting


D 1

Prerequisites: • Connector to the accelerator pedal sensor disconnected. Measurement box with adapter connected to the • accelerator pedal sensor. • Measure resistance using multimeter. • Ignition key in OFF position. • Measurement at the accelerator pedal sensor.

Measuring points

Expected value

1-3

(no acceleration) ∞ 20 - 90 (full acceleration)

88890016 J39200

Brake pedal switch 2 Prerequisites: • Connector to the brake pedal switch (two sockets) disconnected. • Measure resistance using multimeter. • Ignition key in OFF position. • Measurement at brake pedal switch. Measuring points

Expected value

“C” - “NO”

0

(brake pedal at rest) (brake pedal depressed)

∞

9990008 J39200

Clutch pedal switch 3 Prerequisites: • Connector to the clutch pedal switch (two sockets) disconnected (if the vehicle is equipped with clutch pedal). Measure resistance using multimeter. • • Ignition key in OFF position. • Measurement at the clutch pedal switch. Measuring points

Expected value

“C” - “NO”

0 ∞

(clutch pedal at rest) (clutch pedal depressed)

9990008 J39200

55


Troubleshooting

Check of subsystem

D

Supply wire, pedal switches 1

Prerequisites: • Measurement box with adapter connected between VECU connector PA and wiring harness. • Measurement box with adapter connected between VECU connector PB and wiring harness. • Measure voltage using multimeter. • VECU connected. • Ignition key in DRIVE position. Measuring points

Expected value

PB19 - PA12

B+

9998533 , 9998699 , 9813194 J39200

Signal wire, idle validation switch 1 2 Prerequisites: • Measurement box with adapter connected between VECU connector PA and wiring harness. Measure voltage using multimeter. • VECU connected. • • Ignition key in DRIVE position. Measuring points

Expected value

PA23 - PA12


9998533 , 9998699 J39200

56


Troubleshooting

Signal wire, brake pedal switch

D 3

Prerequisites: • Measurement box with adapter connected between VECU connector PA and wiring harness. Measure voltage using multimeter. • VECU connected. • • Ignition key in DRIVE position.

Measuring points PA5 - PA12

Expected value

B+ (brake pedal at rest) 0 V (brake pedal depressed)

9998533 , 9998699 J39200

Signal wire, clutch pedal switch 4 Prerequisites: • Measurement box with adapter connected between VECU connector PA and wiring harness. Measure voltage using multimeter. • • VECU connected. • Ignition key in DRIVE position. Measuring points

Expected value

PA8 - PA12

B+ (clutch pedal at rest) 0 V (clutch pedal depressed)

9998699 , 9813194 J39200


57


Troubleshooting

MID 144 PPID 71 Cruise Control and Engine Brake, Switch Supply

D

W3005548

W3005650

General Information Voltage supply to switch for cruise control and engine brake control.

Component: S07 engine brake switch, selector type; S24 engine brake stalk switch (Cummins EBR-CBJ6 only); S25 switch unit, cruise control.

58


Fault code FMI 4 Abnormally low voltage or short circuit to lower voltage. Conditions for fault code: • If the VECU registers a voltage lower than 3.0 V on the supply cable, the control unit interprets this as a fault and a fault code is set. Possible cause: • Supply wire short-circuited to ground. • Signal wire for cruise control, SET+/SET /RESUME/ON, shor t-circuited to ground. • Signal wire for engine brake switch (if the vehicle is equipped with engine brake), EPG/VCB, short-circuited to ground. • Signal wire for engine brake stalk switch (if equipped with engine brake), short-circuited to ground. Faulty contact or switch. • • Switch resistance and oxidation.

Troubleshooting

D

Reaction from VECU: • Fault code is set. • Yellow lamp is requested. Noticeable external symptom: • Yellow lamp lights up. • All functions in the cruise control cannot be used. • All functions for engine brake cannot be used. • Engine does not respond to full acceleration. Action: • “MID 144 PPID 71 Cruise Control and Engine Brake, Switch Supply, Check” page 60.

59


Troubleshooting

3649-21-03-12 MID 144 PPID 71 Cruise Control and Engine Brake, Switch Supply, Check

D

Special tools: 9990008, 9998533, 9998699 Other special equipment: 9813194, J39200




• •

Cruise control switch, test Engine brake function, test

Measurement at the component’s connector to VECU Note: Faults in the wiring harness to the VECU can damage the component. Therefore, a check of the component should also be made if any of the measurement values deviate.

Supply wire, cruise control switch 1 Prerequisites: • Connector to Cruise control switch disconnected. • Measurement box with adapter connected to the VECU. • Connector to engine brake switch disconnected (if the vehicle is equipped with engine brake). • Measure voltage using multimeter. • VECU connected. • Ignition key in DRIVE position. • Measurement to the VECU.

60


Measuring points 1 - ground

Troubleshooting

D Expected value

B+

9990008 , J39200

Signal wire, Cruise control switch 2

Prerequisites: • Connector to Cruise control switch disconnected. • Measurement box with adapter connected to the VECU. VECU connected. • • Ignition key in OFF position. • Measurement to the VECU.

Measuring points

Expected value

5 - ground

2.1 - 3.1 k

(SET+)

3 - ground

2.1 - 3.1 k

(RESUME)

2 - ground

2.1 - 3.1 k

(ON)

4 - ground

2.1 - 3.1 k

(SET-)

9990008 , J39200

Supply wire, engine brake switch (Volvo engine) 3 Note: The check below applies only to vehicles equipped with Volvo Engine Brake (EBR-VEB). Prerequisites: • Connector to dash engine brake switch disconnected. • Connector to Cruise control switch disconnected. • Measure voltage using multimeter. • VECU connected. • Ignition key in DRIVE position. • Measurement to the VECU. Measuring points

Expected value

1 - ground

B+

9990008 , J39200

61


Troubleshooting

Signal wire, engine brake switch

D

4 Note: The check below applies only to vehicles equipped with Volvo Engine Brake (EBR-VEB). Prerequisites: • Connector to dash engine brake switch disconnected. • Measure resistance using multimeter. • VECU connected. • Ignition key in OFF position. • Measurement to the VECU. Measuring points

Expected value

5 - ground

2.1 - 3.1 k

(VCB)

6 - ground

2.1 - 3.1 k

(EPG)

9990008 , J39200

Supply wire, engine brake switch stalk lever (Cummins engine) 5 Note: The check below applies only to vehicles equipped with engine brake stalk switch (Cummins EBR-CBJ6). Prerequisites: • Connector to stalk lever, engine brake disconnected. • Measurement box with adapter connected to the VECU. • Connector to Cruise control switch disconnected. • Measure voltage using multimeter. • VECU connected. • Ignition key in DRIVE position. • Measurement to the VECU. Measuring points

Expected value

1 - ground

B+

9990008 , J39200

62


Troubleshooting

Signal wire, engine brake switch lever (Cummins engine)

D

6 Note: The check below applies only to vehicles equipped with engine brake stalk lever (Cummins EBR-CBJ6). Prerequisites: • Connector to stalk lever, engine brake disconnected. • Measurement box with adapter connected to the VECU. • Measure resistance using multimeter. • VECU connected. • Ignition key in OFF position. • Measurement to the VECU.

Measuring points

Expected value

3 - ground

∞ (OFF) 2.1 - 3.1 k (ON)

9990008 , J39200



63


Troubleshooting

Switch for the cruise control

D

1

Prerequisites: • Connector to Cruise control switch disconnected. • Measurement box with adapter connected to switch cruise control. Measure resistance using multimeter. • • Ignition key in OFF position. • Measurement at switch cruise control. Measuring points

Expected value

1-5

∞

(SET+ inactive)

0

(SET+ active)

∞

(RESUME inactive)

0

(RESUME active)

1-3

1-2

1-4

∞

(OFF)

0

(ON)

0

(RESUME active)

∞

(SET- inactive)

0

(SET- active)

∞

(SET+ active)

9990008 , J39200

Check of the dash switch for engine brake (Volvo engines) 2 Note: The check below applies only to vehicles equipped with Volvo Engine Brake (EBR-VEB). Prerequisites: • Connector to dash engine brake switch disconnected. • Measure resistance using multimeter. • Ignition key in OFF position. • Measurement at dash switch for engine brake. Measuring points 1-6

Expected value ∞

0 0 1-5

(EPG inactive) (EPG active) (VCB active, if the vehicle is equipped with VCB)

(VCB and EPG inactive, if the vehicle is equipped with VCB) 0 (VCB active, if the vehicle is equipped with VCB) ∞

9990008 , J39200

64


Troubleshooting

Check of stalk lever for the engine brake (Cummins engine)

D

3 Note: The check below applies only to vehicles equipped with engine brake stalk lever (Cummins EBR-CBJ6). Prerequisites: • Connector to stalk lever, engine brake disconnected. • Measurement box with adapter connected to stalk lever, engine brake. • Measure resistance using multimeter. • Ignition key in OFF position. • Measurement at stalk lever, engine brake.

Measuring points 1-3

Expected value (OFF) (ON)

∞

0

9990008 , J39200

Check of subsystem Supply wire 1 Prerequisites: • Measurement box with adapter connected between VECU connector PA and wiring harness. • Measurement box with adapter connected between VECU connector PB and wiring harness. • Measure voltage using multimeter. • VECU connected. • Ignition key in DRIVE position. Measuring points

Expected value

PB5 - PA12

B+

9998533 , 9998699 , 9813194 , J39200

65


Troubleshooting

Signal wire, Cruise control switch

D

2

Prerequisites: • Measurement box with adapter connected between VECU connector PA and wiring harness. Measure voltage using multimeter. • VECU connected. • • Ignition key in DRIVE position. Measuring points

Expected value

PA2 - PA12

0 V (SET+ inactive) B+ (SET+ active)

PA30 - PA12

0 V (RESUME inactive) B+ (RESUME active)

PA3 - PA12

0 V (OFF) B+ (ON) B+ (RESUME active)

PA1 - PA12

0 V (SET - inactive) B+ (SET- active) 0 V (SET+ active)

9998533 , 9998699 , 9813194 , J39200

Signal wire, engine brake switch (Volvo engine) 3 Note: The check below applies only to vehicles equipped with Volvo Engine Brake (EBR-VEB). Prerequisites: • Measurement box with adapter connected between VECU connector PA and wiring harness. • Measure voltage using multimeter. • VECU connected. • Ignition key in DRIVE position. Measuring points

Expected value

PA21 - PA12

0 V (EPG inactive) B+ (EPG requested) B+ (VCB requested, if equipped)

PA20 - PA12

0 V (VCB and EPG inactive, if equipped) B+ (VCB requested, if equipped)

9998699 , 9813194 , J39200

66


Troubleshooting

Signal wire, engine brake switch stalk lever (Cummins engine)

D

4 Note: The check below applies only to vehicles equipped with engine brake stalk lever (Cummins EBR-CBJ6). Prerequisites: • Measurement box with adapter connected between VECU connector PA and wiring harness. Measure voltage using multimeter. • • VECU connected. • Ignition key in DRIVE position.

Measuring points

Expected value

PA20 - PA12

0 V (OFF, inactive) B+ (ON, active)

9998699 , 9813194 , J39200


67


Troubleshooting

MID 144 PPID 72 Accelerator Pedal and Engine Brake, Sensors

D

Supply

W3006773 W3006778

General Information Supply voltage to sensors for accelerator pedal and engine brake stalk lever. (Engine brake stalk lever is used only with Cummins EBR-CBJ6.) The sensors are supplied with a reference voltage of 5.0 V. Each change of the accelerator pedal’s angle controls

the input signal to the VECU. For normal values, see table page 74.

Component:B25 accelerator pedal sensor; S24 engine brake stalk lever (Cummins EBR-CBJ6 only); A17, VECU.

Fault codes FMI 3

FMI 4



Conditions for fault code: • If the VECU registers a voltage higher than 5.7 V on the supply wire, the control unit interprets this as a fault and a fault code is set.

Conditions for fault code: • If the VECU registers a voltage lower than 4.7 V on the supply wire, the control unit interprets this as a fault and a fault code is set.

Possible cause: • Open circuit, ground wire. • Supply wire short-circuited to higher voltage. • Open circuit, supply wire. • Faulty sensor. • Switch resistance and oxidation.

Possible cause: • Supply wire short-circuited to ground or lower voltage. • Faulty sensor.

Reaction from VECU: • Fault code is set. • Yellow lamp is requested. Noticeable external symptom: • Yellow lamp lights up. • Engine does not respond to full acceleration. • No engine brake affect. Action: • “MID 144 PPID 72 Accelerator Pedal and Engine Brake, Sensors Supply, Check” page 69.

68

Reaction from VECU: • Fault code is set. • Yellow lamp is requested. Noticeable external symptom: • Yellow lamp lights up. • Engine does not respond to full acceleration. • No engine brake effect. Action: • “MID 144 PPID 72 Accelerator Pedal and Engine Brake, Sensors Supply, Check” page 69.


Troubleshooting

3649-21-03-13 MID 144 PPID 72 Accelerator Pedal and Engine Brake, Sensors Supply, Check

D





• •

Control auxiliary brake, test Accelerator pedal switches and sensors, test


Ground wire, accelerator pedal 1 Prerequisites: • Connector to the accelerator pedal sensor disconnected. • Adapter connected to the accelerator pedal connector. • Connector to engine brake switch disconnected (if equipped). Measure resistance using multimeter. • • VECU connected. • Ignition key in OFF position. • Measurement to the VECU. Measuring points

Expected value

4 - ground

0

88890016 , J39200

69


Troubleshooting

Supply wire, accelerator pedal

D

2

Prerequisites: • Connector to the accelerator pedal sensor disconnected. Adapter connected to accelerator pedal connector. • Connector to engine brake switch disconnected (if • equipped). Measure voltage using multimeter. • • VECU connected. • Ignition key in DRIVE position. • Measurement to the VECU. Measuring points

Expected value

6 - ground

4.3 - 6.5 V

88890016 , J39200

Signal wire, accelerator pedal 3 Prerequisites: • Connector to the accelerator pedal sensor disconnected. Adapter connected to accelerator pedal connector. • • Connector to engine brake switch disconnected (if equipped). • Measure resistance using multimeter. • VECU connected. • Ignition key in OFF position. • Measurement to the VECU. Measuring points

Expected value

5 - ground

80 - 120 k

88890016 , J39200

70


Troubleshooting

Ground wire, engine brake stalk lever (Cummins engine)

D

4 Note: The check below applies only to vehicles equipped with engine brake stalk lever (Cummins EBR-CBJ6). Prerequisites: • Connector to engine brake switch disconnected. • Connector to the accelerator pedal sensor disconnected. • Adapter pin connected to engine brake, stalk lever connector. • Measure resistance using multimeter. • VECU connected. • Ignition key in OFF position. • Measurement to the VECU.

Measuring points

Expected value

5 - ground

0

9990008 , J39200

Supply wire, engine brake stalk lever (Cummins engine) 5 Note: The check below applies only to vehicles equipped with engine brake stalk lever (Cummins EBR-CBJ6). Prerequisites: • Connector to the accelerator pedal sensor disconnected. • Engine brake stalk lever switch disconnected. • Adapter pin connected to engine brake, stalk lever connector. Measure voltage using multimeter. • • VECU connected. • Ignition key in DRIVE position. • Measurement to the VECU. Measuring points

Expected value

4 - ground

4.3 - 6.5 V

9990008 , J39200

71


Troubleshooting

Signal wire, engine brake, stalk lever (Cummins engine)

D

6 Note: The check below applies only to vehicles equipped with engine brake stalk lever (EBR-CBJ6). Prerequisites: • Connector to the accelerator pedal sensor disconnected. Engine brake stalk lever switch disconnected. • • Adapter pin connected to engine brake, stalk lever connector. • Measure resistance using multimeter. • VECU connected. • Ignition key in OFF position. • Measurement to the VECU. Measuring points

Expected value

6 - ground

80 - 120 k

9996899 , J39200



Accelerator pedal sensor 1 Prerequisites: • Connector to the accelerator pedal sensor disconnected. • Adapter connected to the accelerator pedal sensor. • Measure resistance using multimeter. • Ignition key in OFF position. • Measurement at the accelerator control sensor. Measuring points

Expected value

6-4

3.2 - 4.8 k

5-4

1.0 - 2.0 k

88890016 , J39200

72

(no acceleration)


Troubleshooting

Switch for engine brake stalk lever (Cummins engine)

D

2 Note: The check below applies only to vehicles equipped with engine brake stalk lever (EBR-CBJ6). Prerequisites: • Connector to engine brake switch disconnected. • Measurement box with adapter connected to engine brake switch. • Measure resistance using multimeter. • Ignition key in OFF position. • Measurement at engine brake stalk lever.

Measuring points

Expected value

4-5

1.7 - 2.5 k

(pos 1)

1.3 - 2.0 k

(pos 2)

1.1 - 1.7 k

(pos 3)

0.9 - 1.4 k

(pos 4)

0.8 - 1.2 k

(pos 5)

0.7 - 1.1 k

(pos 6)

1.0 - 1.4 k

(pos 1)

0.9 - 1.3 k

(pos 2)

0.8 - 1.2 k

(pos 3)

0.8 - 1.1 k

(pos 4)

0.7 - 1.1 k

(pos 5)

0.7 - 1.0 k

(pos 6)

6-5

J39200

Check of subsystem Ground wire 1 Prerequisites: • Measurement box with adapter connected between VECU connector PB and wiring harness. Measure resistance using multimeter. • • VECU connected. • Ignition key in OFF position. Measuring points

Expected value

PB22 - ground

0

9998533 , 9998699 , J39200

73


Troubleshooting

Supply wire

D

2

Prerequisites: • Measurement box with adapter connected between VECU connector PB and wiring harness. Measure voltage using multimeter. • VECU connected. • • Ignition key in DRIVE position. Measuring points

Expected value

PB10 - PB22

4.5 - 5.5 V

9998533 , 9998699 , J39200

Signal wire, accelerator pedal 3 Prerequisites: • Measurement box with adapter connected between VECU connector PB and wiring harness. • Measure voltage using multimeter. • VECU connected. • Ignition key in DRIVE position. Measuring points

Expected value

PB8 - PB22

0.4 - 0.6 V (no acceleration) 2.6 - 3.8 V (full acceleration)

9998533 , 9998699 , J39200

74


Troubleshooting

Signal wire, engine brake, stalk lever (Cummins engine)

D 4

Prerequisites: • Measurement box with adapter connected between VECU connector PB and wiring harness. Measure voltage using multimeter. • • VECU connected. • Ignition key in DRIVE position.

Measuring points PB24 - PB22

Expected value


9998533 , 9998699 , J39200


75


Troubleshooting

MID 144 PPID 74 VECU Power Supply

D W3006779

W3006775

General Information Component: Rly 4 EMS power; A17, VECU; F71 Fuse, VECU power; FB01 fuse, FB05 fuse, battery 1; G01 battery.

Fault code FMI 3

FMI 4



Condition for fault code: • If the voltage from relay 4, VECU pin PB15 is greater than 1V, the VECU will interpret it as a fault and a fault code will be set.

Condition for fault code: • If the voltage from relay 4, VECU pin PB15 is less than 0V, the VECU will interpret it as a fault and a fault code will be set.

Possible cause: • Short-circuit to higher voltage. • Faulty relay.

Possible cause: • Open circuit, cable from relay. • Fault in relay.



Noticeable external symptom: • Yellow lamp lights up.

Noticeable external symptom: • Yellow lamp lights up.

Action: • “MID 144 PPID 74 Power Supply EECU/VECU, Check” page 77.

Action: • “MID 144 PPID 74 Power Supply EECU/VECU, Check” page 77.

76


Troubleshooting

3649-21-03-05 MID 144 PPID 74 Power Supply EECU/VECU, Check

D





Ground wire 1 Prerequisites: • Relay EMS disconnected • Measure resistance using multimeter. • VECU connected. • Ignition key in OFF position. • Measurement to the VECU. Measuring points

Expected value

85 - ground

0.5 M

9990008 J39200



77


Troubleshooting

Relay EMS

D

1

Prerequisites:

Earth

PB15 - ground

•

Measurement box with adapter connected between VECU connector PB and wiring harness.

• •

Ignition key in OFF position. Check of the relay EMS.

Checks

Listen for clicking (relay active)

9998533 , 9998699

Check of subsystem Ground wire 1 Prerequisites: • Measurement box with adapter connected between VECU connector PB and wiring harness. • Measure voltage using multimeter. • The control unit connected • Ignition key in OFF position. Earth PB15 - PB22

Checks B+ (relay inactive) 0 V (ground PB15 and listen for relay clicking; relay active)

Note: When relay is active, fuse F71 is supplied with 12 V which then supplies PA13 with voltage. 9998533 , 9998699

78


Troubleshooting

MID 144 SID 230 Idle Validation Switch 1

D W3006780

W3006772

General Information Component: B25 Sensor, accelerator pedal; A17, VECU

Fault code FMI 7 Incorrect response from mechanical system. Conditions for fault code: • If the signal from the idling switch is not available in the interval 0 - 13 %, the control unit interprets this as a fault and a fault code is set. Possible cause: • Open circuit, supply cable. • Open circuit, signal cable. • Signal cable short-circuited to ground. • Signal cable short-circuited to voltage. • Faulty switch. • Switch resistance and oxidation. Reaction from VECU: • Fault code is set. • Yellow lamp is requested. Noticeable external symptom: • Yellow lamp lights up. • Engine does not respond to full acceleration. Action: • “MID 144 SID 230 Idle Validation Switch 1, Check” page 80.

79


Troubleshooting

3649-21-03-18 MID 144 SID 230 Idle Validation Switch 1, Check

D

Special tools: 88890016 Other special equipment: J39200




• •

Accelerator pedal switches and sensors, test MID 144 pinout test


Supply wire 1 Prerequisites: • Connector to the accelerator pedal sensor disconnected. Measurement box with adapter connected to the • VECU. The following other pedal connectors disconnected: •

• •

The brake pedal switch (two sockets). The clutch pedal switch (if equipped). • Measure voltage using multimeter. • VECU connected. • Ignition key in DRIVE position. • Measurement to the VECU.

Measuring points

Expected value

3 - ground

B+

88890016 , J39200

80


Troubleshooting

Signal wire

D 2

Prerequisites: • Connector to the accelerator pedal sensor disconnected. Measurement box with adapter connected to VECU. • Measure resistance using multimeter. • • VECU connected. • Ignition key in OFF position. • Measurement to the VECU.

Measuring points

Expected value

1 - ground

2.1 - 3.1 k

88890016 , J39200


Check of component Note: Faults in the component can be caused by faults in the wiring harness to the control unit. Therefore, a check of the wiring harness also should be made before connecting a new component.

Idle validation switch 1 1 Prerequisites: • Connector to the accelerator pedal sensor disconnected. • Measurement box with adapter connected to the accelerator pedal sensor. • Measure resistance using multimeter. • Ignition key in OFF position. • Measurement at the accelerator pedal sensor. Measuring points

Expected value

1-3

(pedal at idle) 20 - 90 (pedal off idle) ∞

88890016 , J39200

81


MID 144 SID 231 J1939 Control Link General Information The system’s control signals are sent via J1939 Control Data Link. Information and diagnostic signals are sent via J1587/1708 Information Data Link. The link also functions as a reserve system for the J1939, if the Control Data Link does not function for any reason.

Component: A17, VECU

Fault code FMI 2 Intermittent or incorrect data.

Note: Connection of the measurement box and adapter to the VECU’s "PA" connector may result in a ’ghost’ fault code (SID231 / FMI 2) resulting from the adapter’s effect on the J1939 CAN_2 link (pins PA-15 and PA-16). If the fault was not present before connection of the measurement box, ignore the code and erase all inactive fault codes following testing. Conditions for fault code: • If the VECU does not receive confirmation for the messages on the control link, the control unit interprets this as a fault and a fault code is set. Possible cause: • Loose connection. • Open circuit, the control link. • Switch resistance and oxidation. Reaction from VECU: • Fault code is set. • Yellow lamp is requested. Noticeable external symptom: • Yellow lamp lights up. Action: • Troubleshoot J1939 Control Data Link; refer to Service Information, group 37.

FMI 12 Faulty unit or component.

Note: This fault code is normally not caused by errors in the VECU. Conditions for fault code: • If the expected messages are not available from a control unit on the control link the VECU interprets this as a fault and a fault code is set. Possible cause: • Open circuit, communication cable. • Switch resistance and oxidation. Reaction from VECU: • Fault code is set. • Yellow lamp is requested. Noticeable external symptom: • Yellow lamp lights up. Action: • Troubleshoot J1939 Control Data Link; refer to Service Information, group 37. 82

D

Troubleshooting


Troubleshooting

MID 144 SID 240 Program Memory

D

T2012704

General Information At start-up a checksum is calculated for the software in the VECU flash memory. This is compared with a previously stored checksum to check that the software is correct.

Component: A17, VECU

Fault code FMI 2 Intermittent or incorrect data Conditions for fault code: • If the checksum calculated at start-up does not agree with the previously saved checksum, the VECU interprets this as a fault and a fault code is set. Possible cause: • Software fault. • Faulty memory circuit. Reaction from VECU: • The control unit continuously restarts. Noticeable external symptom: • Yellow lamp is lit by the instrument control unit since the VECU does not respond to the call. The vehicle can only be run at increased idling speed. •

83


Troubleshooting

MID 144 SID 243 Cruise Control Set Switch

D

W3005580 W3005540

General Information Component: S02 Switch unit, cruise control.

Fault code FMI 7 Incorrect response from mechanical system. Conditions for fault code: • If the VECU receives the signals for SET+ and SETat the same time, the control unit interprets this as a fault and a fault code is set. Possible cause: • Signal wire short-circuited to voltage. • Faulty switch. Reaction from VECU: • Fault code is set. • Yellow lamp is requested. Noticeable external symptom: • Yellow lamp lights up. • The cruise control function does not work. The speed cannot be set, but if the speed has been set previously it can be resumed with RESUME. Action: • “MID 144 SID 243 Cruise Control Set Switch, Check” page 85.

84


Troubleshooting

3649-21-03-20 MID 144 SID 243 Cruise Control Set Switch, Check

D





• •

Cruise control switch, test MID 144 pinout test


Supply wire 1 Prerequisites: • 14–pin connector (green) to Cruise control switch disconnected. • Measurement box with adapter connected to the VECU. • Measuring voltage using the multimeter. • Control unit connected. • Ignition key in drive position. • Measurement to the VECU.

85


Troubleshooting

D

Measuring points

Expected value

1 - ground

B+

9996899 , 9990020 , J39200

Signal wire 2

Prerequisites: • Connector to Cruise control switch disconnected. • Measurement box with adapter connected to the VECU. • Measure resistance using multimeter. • Control unit connected. • Ignition key in OFF position. • Measurement to the VECU. Measuring points

Expected value

5 - ground

2.1 - 3.1 k

(SET+)

3 - ground

2.1 - 3.1 k

(RESUME)

2 - ground

2.1 - 3.1 k

(ON)

4 - ground

2.1 - 3.1 k

(SET- )

9996899 , 9990020 , J39200


86


Troubleshooting

Check of component

D


Signal wire, Cruise control switch 1

Prerequisites: • Connector to Cruise control switch disconnected. • Measurement box with adapter connected to the VECU. Measure resistance using multimeter. • • Ignition key in OFF position. • Measurement at switch cruise control.

Measuring points

Expected value

5 - 4 (against switch)

∞

(SET+ and SET- inactive)

∞

(ON and SET+ active)

∞

(RESUME active and SET+ active)

∞

(ON and SET- active)

∞

(RESUME active and SET- active)

9996899 , 9990020 , J39200

Check of subsystem Signal wire 1 Prerequisites: • Measurement box with adapter connected between VECU connector PA and wiring harness. Measuring voltage using the multimeter. • • Control unit connected. • Ignition key in drive position. Measuring points

Expected value

PA1 - PA12

B+ (OFF and SET- active) 0 V (OFF and SET+ active) 0 V (ON and SET+ active) 0 V (RESUME active and SET+ active)

PA2 - PA12

B+ (OFF and SET+ active) 0 V (OFF and SET- active) 0 V (ON and SET- active) 0 V (RESUME active and SET- active)

9813194 , 9998699 , J39200

87


MID 144 SID 250 J1587/J1708 Information Data Link General Information The non-critical communication between the vehicle’s control units and the display on the instrument’s gauges is carried out via J1587/1708 Information Data Link. The system’s critical control signals are sent via the J1939 Control Data Link. Information and diagnostic signals are sent via J1587/1708 Information Data Link. The link also functions as a reserve system for the J1939 Control Data Link, if the Control Data Link does not function for any reason. J1587/1708 Information Data Link keeps the system status continually updated and makes this information available for reading via the diagnostics socket.

Component: A17, VECU.

Fault code FMI 2 Intermittent or incorrect data.

•

If the VECU is unable to send it’s messages onto the databus after several attempts, the VECU will use this fault code to flag a possible physical fault with the datalink.

Conditions for fault code: • If the VECU registers incorrect messages on the information link the control unit interprets this as a fault and a fault code is set. Possible cause: • Several units are sending at the same time on the information link. Reaction from VECU: • Fault code is set. • Yellow lamp is requested. Noticeable external symptom: • Yellow lamp lights up. Action: • Troubleshoot J1939 Control Data Link; refer to Service Information, group 37.

88

D

Troubleshooting


Troubleshooting

MID 144 SID 253 Calibration Memory EEPROM

T2012704

D

General Information At start-up a checksum is calculated for the data set in the control unit’s EEPROM memory. This is compared

with a previously stored checksum to check that the data set is correct.

Fault code FMI 2

FMI 13


Calibration values outside the limits.

Conditions for fault code: • If the VECU receives an error in calculating the checksum in the calibration memory the control unit interprets this as a fault and a fault code is set.

Conditions for fault code: • If the checksum for the data set calculated at start-up does not agree with the previously saved checksum, the VECU interprets this as a fault and a fault code is set.

Possible cause: • Faulty memory circuit. • Error when programming. Reaction from VECU: • Fault code is set. • Red lamp is requested. Noticeable external symptom: • Red lamp lights up. • The vehicle can only be driven at increased idling speed.

Possible cause: • Incorrect data set. • Faulty memory circuit. Reaction from VECU: • Fault code is set. • Red lamp is requested. Noticeable external symptom: • Red lamp lights up. • The vehicle can only be driven at increased idling speed.

89


Troubleshooting

MID 144 PSID 4 Engine Brake Stalk Lever (Cummins engine; applies only to EBR-CBJ6.)

D W3005544

T3015745

General Information Component: S24 Stalk lever, engine brake A17, VECU

Fault code FMI 3

FMI 4



Conditions for fault code: • If the VECU registers a voltage higher than 4.8 V, the control unit interprets this as a fault and a fault code is set.

Conditions for fault code: • If the VECU interprets a voltage below 0.2 V as a fault and a fault code is set.

Possible cause: • Open circuit, ground cable. • Signal cable short-circuited to voltage. • Faulty switch. • Switch resistance and oxidation.

Possible cause: • Open circuit, supply cable. • Open circuit, signal cable. • Signal cable short-circuited to ground. • Faulty switch. • Switch resistance and oxidation.



Noticeable external symptom: • Yellow lamp lights up. • Engine brake cannot be activated.

Noticeable external symptom: • Yellow lamp lights up. • Engine brake cannot be activated.

Action: • “MID 144 PSID 4 Engine Brake Stalk Lever, Check” page 91.

Action: • “MID 144 PSID 4 Engine Brake Stalk Lever, Check” page 91.

90


Troubleshooting

3649-21-03-25 MID 144 PSID 4 Engine Brake Stalk Lever, Check

D

Special tools: 9998533, 9998699 Other special equipment: J39200




• •

Engine brake, function test MID 144 pinout test

Measurement at component connector to VECU Note: Faults in the wiring harness to the VECU can damage the component. Therefore, a check of the component should also be made if any of the measurement values deviate. Note: It may be necessary to temporarily remove the connector from its mounting location to perform the following checks. 1 Disconnect the connector at the switch for the engine brake. 2 Disconnect the connector at the accelerator pedal sensor.

91


Troubleshooting

Ground wire

D

3

Prerequisites: • Back-probe the connector at the designed cavity. • Measure resistance using multimeter. • Control unit connected. • Ignition key in OFF position. • Measurement to the VECU. Measuring points

Expected value

5 - ground

≈ 0

9998699 J39200

Supply wire 4 Prerequisites: • Back-probe the connector at the designed cavity. • Measuring voltage using the multimeter. • Control unit connected. • Ignition key in drive position. • Measurement to the VECU. Measuring points

Expected value

4 - ground

≈ 4.3

- 6.5 V

9998699 J39200

Signal wire 5 Prerequisites: • Back-probe the connector at the designed cavity. • Measure resistance using multimeter. • Control unit connected. • Ignition key in OFF position. • Measurement to the VECU. Measuring points

Expected value

6 - ground

0.8 - 1.2 k

J39200


Check of component Note: Faults in the component can be caused by faults in the wiring harness of the control unit. Therefore, a 92


Troubleshooting

check of the wiring harness should also be made before connecting a new component.

D

Note: It may be necessary to temporarily remove the connector from its mounting location to perform the following checks.

Engine brake switch 1

Prerequisites: • Connector to engine brake switch connected. • Back-probe the connector at the designated cavity. • Measure resistance using multimeter. • Ignition key in OFF position. • Measurement at stalk lever.

Measuring points

Expected value

4-5

1.7 - 2.5 k

(pos 1)

1.3 - 2.0 k

(pos 2)

1.1 - 1.7 k

(pos 3)

0.9 - 1.4 k

(pos 4)

0.8 - 1.2 k

(pos 5)

0.7 - 1.1 k

(pos 6)

1.0 - 1.4 k

(pos 1)

0.9 - 1.3 k

(pos 2)

0.8 - 1.2 k

(pos 3)

0.8 - 1.1 k

(pos 4)

0.7 - 1.1 k

(pos 5)

0.7 - 1.0 k

(pos 6)

6-5

J39200

Check of subsystem Ground wire 1 Prerequisites: • Measurement box with adapter connected between VECU connector PB and wiring harness. Measuring resistance using multimeter. • • Control unit connected. • Ignition key in OFF position. Measuring points

Expected value

PB22 - ground

≈ 0

9998533 , 9998699 J39200

93


Troubleshooting

Supply wire

D

2

Prerequisites: • Measurement box with adapter connected between VECU connector PB and wiring harness. Measuring voltage using multimeter. • Control unit connected. • • Ignition key in DRIVE position. Measuring points

Expected value

PB10 - PB22

≈ 4

-6V

9998533 , 9998699 J39200

Signal wire 3 Prerequisites: • Measurement box with adapter connected between VECU connector PB and wiring harness. • Measuring voltage using multimeter. • Control unit connected. • Ignition key in DRIVE position. Measuring points

Expected value

PB24 - PB22


9998533 , 9998699 J39200

Verification Using the PC tool, check that the fault has been corrected (see “Tests Using PC Tool” page 91).

94


Troubleshooting

MID 144 PSID 200 Data Link, Engine Control Unit General Information The control units share important information on the J1939 Control Data Link. If a control unit lacks messages from another control unit, this fault code will be used to point out the control unit that is expected to send messages on the J1939 Control Data Link.

Fault code FMI 9 Abnormal updating rate.

D

Condition for fault code: • If the VECU does not receive any messages on the J1939 Control Data Link from the EECU within a certain time, the control unit will interpret this as a fault and a fault code is set. Possible cause: • Fault in J1939 Control Data Link between EMS control unit and VECU Reaction from VECU: • Yellow lamp requested. Noticeable external symptom: • Yellow lamp lights up. Action: • Troubleshoot J1939 Control Data Link; refer to Service Information, group 37.

95


MID 144 PSID 202 Data Link, Instrument Control Unit General Information The control units share important information on the J1939 Control Data Link. If a control unit lacks messages from another control unit, this fault code will be used to point out the control unit that is expected to send messages on the J1939 Control Data Link.

Fault code FMI 9 Abnormal updating rate. Condition for fault code: • If the VECU does not receive any messages concerning time/date on the J1939 Control Data Link from the instrument within a certain time, the control unit will interpret this as a fault and a fault code is set. Possible cause: • Fault in J1939 Control Data Link between instrument and VECU Reaction from VECU: • Yellow information lamp requested. Noticeable external symptom: • Yellow lamp lights up. Action: • Troubleshoot J1939 Control Data Link; refer to Service Information, group 37.

96

D

Troubleshooting


Troubleshooting

MID 144 PSID 204 Data Link, Brake Control Unit General Information The control units share important information on the J1939 Control Data Link. If a control unit lacks messages from another control unit, this fault code will be used to point out the control unit that is expected to send messages on the J1939 Control Data Link.

Fault code FMI 9 Abnormal updating rate.

D

Condition for fault code: • If the VECU does not receive any messages on the J1939 Control Data Link from the brake control unit within a certain time, the control unit will interpret this as a fault and a fault code is set. Possible cause: • Fault in J1939 Control Data Link between ABS/EBS control unit and VECU Reaction from VECU: • Yellow lamp requested. Noticeable external symptom: • Yellow lamp lights up. Action: • Troubleshoot J1939 Control Data Link; refer to Service Information, group 37.

97


Troubleshooting

MID 144 PSID 210 J1939 Control Data Link Interruption, Lighting Control Module (LCM) General Information The control units share important information on the J1939 Control Data Link. If a control unit lacks messages from another control unit, this fault code will be used to point out the control unit that is expected to send messages on the J1939 Control Data Link.

Fault code FMI 9 Abnormal updating rate. Condition for fault code: • If the VECU does not receive any messages on the J1939 Control Data Link from the light control module within a certain time, the control unit will interpret this as a fault and a fault code is set. Possible cause: • Fault in J1939 Control Data Link between LCM control unit and VECU Reaction from VECU: • Yellow lamp requested. Noticeable external symptom: • Yellow lamp lights up. Action: • Troubleshoot J1939 Control Data Link; refer to Service Information, group 37.

98

D


Troubleshooting

MID 144 PSID 214 Data Link, Bodybuilder Control Unit (Volvo engines only)

General Information The control units share important information on the J1939 Control Control Data Link. If a control control unit lacks lacks messages from another control unit, this fault code will be used to point out the control unit that is expected to send messages on the J1939 Control Data Link.

Fault code

D

FMI 9 Abnormal updating rate. Condition for fault code: receive any messages messages on the • If the VECU does not receive J1939 Control Data Link from the bodybuilder module within a certain time, the control unit will interpret this as a fault and a fault code is set. Possible cause: Control Data Link between BBM control • Fault in J1939 Control unit and VECU Reaction from VECU: • Yellow lamp requested. Noticeable external symptom: • Yellow lamp lights up. Action: • Troubleshoot J1939 Control Data Link; refer to Service Information, group 37.

99


MID 144 SID 231 J1939 Control Link General Information Internal Internal resets are a normal function of the VECU and are closely monitored and reported when a problem exists. This reset can be due to either an internal or external problem.

Fault Code

D

FMI 4 Abnormally low voltage or short circuit to lower voltage Condition for fault code:

• If the VECU detects an abnormal reset the control control unit will interpret this as an error and a fault code is set. Possible cause: • Inconsistent power supplied to the VECU (EMS relay) Poor ground circuitry circuitry to the VECU • Poor Reaction from VECU: • Yellow lamp requested Noticeable external symptom: • Yellow lamp in cluster Fault code is set • Fault Actions: Check the pow power er supply circuit(s) circuit(s) to the VECU for • Check uninterrupted battery voltage Check for: (Damaged (Damaged wiring, loose connectio connections ns at • Check connectors/splices, loose/bent pins, corrosion, etc.) circuit for good continuity • Check the ground circuit Check Chec k for: (Damaged (Damag ed wiring, loose connectio connections ns at • connectors/splices, loose/bent pins, corrosion, etc.)

FMI 12 Abnormal Reset Condition for fault code:

• If the VECU detects an abnormal reset the control control unit will interpret this as an error and a fault code is set. Possible cause:

• Possible software failure Possible hardware failure Reaction from VECU: • Yellow lamp requested • Yellow lamp in cluster Noticeable external symptom: Fault code is set • Fault Actions: software using VCADS Pro • Replace the VECU’s main software (Do this first before replacing the VECU to see if this resolves the problem) Replace the VECU control unit (Do this last last after all • Replace other checks have been exhausted)

100

Troubleshooting

Operation Numbers

D

3649-21-03-08 MID 144 PID 84 Vehicle Vehicle Speed, Check Check ................................................................................................... 23 3649-21-03-09 MID 144 PID 91 Accelerator Pedal Position Position (Percentage), (Percentage), Check ........................................................... 28 3649-21-03-01 MID 144 PID 150 PTO Output, Check ..................................................................................................... 34 3649-21-03-28 MID 144 PID 191 Output Shaft Speed, Check ......................................................................................... 40 3649-21-03-04 MID 144 PPID 61 Engine Brake Brake Switch, Check ...................................................................................... ........................................................................................ 45 3649-21-03-10 MID 144 PPID 69 Buffered Idle Validation Validation Switch, Check Check ....................................................................... 49 3649-21-03-11 MID 144 PPID 70 Pedal Pedal Switches, Supply, Supply, Check ................................................................................... 52 3649-21-03-12 MID 144 PPID 71 Cruise Control and Engine Brake, Brake, Switch Supply, Supply, Check ........................................... 60 3649-21-03-13 MID 144 PPID 72 Accelerator Pedal Pedal and Engine Brake, Brake, Sensors Supply, Supply, Check ................................... 69 3649-21-03-05 MID 144 PPID 74 Power Power Supply EECU/VECU, EECU/VECU, Check ............................................................................ 77 3649-21-03-18 MID 144 SID 230 Idle Validation Validation Switch 1, Check Check ................................................................................... 80 3649-21-03-20 MID 144 SID 243 Cruise Control Set Switch, Check ............................................................................... 85 3649-21-03-25 MID 144 PSID 4 Engine Brake Brake Stalk Lever, Lever, Check .................................................................................. 91

volvo fh12 Mid 144 Vehicle Ecu

Recommend Documents