Volvo Vectro II From 1998 Service Manual

TSI

Number 030-500

Vehicle Management System

Vectro II From 1998

PV776-TSP144528

Foreword

The descriptions and service procedures contained in this manual are based on designs and methods studies carried out up to June 2001.

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 to have a significant bearing on this manual, 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 S.R.T. (Standard Repair Time).

Service procedures which do not include an operation number in the title are for general information and no reference is made to an S.R.T.

The following levels of observations, cautions and warnings are used in this Service 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.

Danger: Indicates an unsafe practice where serious personal injury or death could occur.

Volvo Trucks North America, Inc.

Greensboro, NC USA

Order number: PV776-144528

© 2001 Volvo Trucks North America, Inc., Greensboro, NC USA

All rights reserved. No part of this publication may be 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.

Contents
General ....................................................................................................	7
Vehicle Management System ................................................................	7
Engine Control System Glossary ........................................................	8
Specifications .......................................................................................	10
Description of Signals ..........................................................................	10
EECU (D7C) and Breakout Box Connected in Series Between
EECU and Wiring Harness ...............................................................	10
EECU, D7C, with Breakout Box Connected to Wiring Harness Only	13
EECU (D12B and D12C), Breakout Box Connected in Series Be-
tween EECU and Wiring Harness .....................................................	16
EECU (D12B and D12C), Breakout Box Connected to Wiring
Harness Only .....................................................................................	19
Pinouts .................................................................................................	22
Engine Electronic Control Unit (EECU) ............................................	22
Pinouts .................................................................................................	26
Vehicle Electronic Control Unit(VECU) .............................................	26
Schematic ............................................................................................	28
D12B ..................................................................................................	28
Schematic ............................................................................................	29
D12C .................................................................................................	29
Schematic ............................................................................................	30
D7C ...................................................................................................	30
Schematic ............................................................................................	31
VECU .................................................................................................	31
Tools ......................................................................................................	33
Special Tools .......................................................................................	33
Other Special Equipment ....................................................................	35
Design and Function ...........................................................................	37
Vehicle Management System ..............................................................	37
Strategy .............................................................................................	37
Conventional Control Systems ..........................................................	37
Data Link System ..............................................................................	38
Data Links, Design and Function ......................................................	39
Diagnostic Connector ........................................................................	47
Communication Equipment ...............................................................	48
Instrument Cluster .............................................................................	49
Vehicle Electronic Control Unit (VECU) ............................................	50
Engine Electronic Control Unit ..........................................................	51
ABS Brake System ECU ...................................................................	63
SRS Airbag ECU ...............................................................................	64
Transmission ECU .............................................................................	65
Breakout Boxes and Harnesses ........................................................	66
VECU Overview ................................................................................	67
VECU Functions ................................................................................	68
Sensor Locations ...............................................................................	73
Control Unit Locations .......................................................................	77
Fuses and Relays ..............................................................................	81
Troubleshooting ...................................................................................	85
Fault Code Troubleshooting ...................................................................	85
Message and Parameter Descriptions ................................................	85
FMI Table .............................................................................................	87
Reading/Clearing Fault Codes ..........................................................	88

1

Fault Tracing Strategy .......................................................................	88
MID 128 EECU ......................................................................................	92
MID 128 Fault Code Table ..................................................................	92
MID 128 PID 45 Preheater Status ......................................................	96
Fault Codes .......................................................................................	96
MID 128 PID 45 Preheater Status, Check ..........................................	97
MID 128 PID 49 ABS Control Status ..................................................	98
Fault Codes .......................................................................................	98
MID 128 PID 49 ABS Control Status, Check ......................................	99
MID 128 PID 84 Road Speed ...........................................................	100
Fault Codes .....................................................................................	100
MID 128 PID 84 Road Speed, Check ...............................................	101
MID 128 PID 85 Cruise Control Status .............................................	102
Fault Codes .....................................................................................	102
MID 128 PID 85 Cruise Control Status, Check ................................	103
MID 128 PID 91 Accelerator Pedal Position .....................................	104
Fault Codes .....................................................................................	104
MID 128 PID 91 Accelerator Pedal Position, Check .........................	105
MID 128 PID 94 Fuel Delivery Pressure ...........................................	106
D7C and D12C ................................................................................	106
Fault Codes .....................................................................................	106
MID 128 PID 94 Fuel Delivery Pressure, Check ..............................	107
D7C and D12C ................................................................................	107
MID 128 PID 100 Engine Oil Pressure .............................................	110
Fault Codes .....................................................................................	110
MID 128 PID 100 Engine Oil Pressure, Check .................................	111
MID 128 PID 102 Boost Pressure .....................................................	114
Fault Codes .....................................................................................	114
MID 128 PID 102 Boost Pressure, Check ........................................	115
MID 128 PID 105 Boost Air Temperature .........................................	118
Fault Codes .....................................................................................	118
MID 128 PID 105 Boost Air Temperature, Check .............................	119
MID 128 PID 107 Air Filter Differential Pressure ..............................	122
Fault Codes .....................................................................................	122
MID 128 PID 107 Air Filter Differential Pressure, Check ..................	124
MID 128 PID 108 Atmospheric Pressure ..........................................	125
Fault Codes .....................................................................................	125
MID 128 PID 110 Engine Coolant Temperature ...............................	126
Fault Codes .....................................................................................	126
MID 128 PID 110 Engine Coolant Temperature, Check ...................	127
MID 128 PID 111 Coolant Level .......................................................	129
Fault Codes .....................................................................................	129
MID 128 PID 111 Coolant Level, Check ...........................................	130
MID 128 PID 158 Battery Voltage .....................................................	131
Fault Codes .....................................................................................	131
MID 128 PID 158 Battery Voltage, Check ........................................	132
MID 128 PID 172 Air Inlet Temperature ............................................	133
Fault Codes .....................................................................................	133
MID 128 PID 172 Air Inlet Temperature, Check ...............................	134
MID 128 PID 174 Fuel Temperature .................................................	136
D7C and D12C ................................................................................	136
Fault Codes .....................................................................................	136
MID 128 PID 174 Fuel Temperature, Check .....................................	137
D7C and D12C ................................................................................	137
MID 128 PID 175 Engine Oil Temperature .......................................	140

2

Fault Codes .....................................................................................	140
MID 128 PID 175 Engine Oil Temperature, Check ...........................	141
MID 128 PID 228 Road Speed Sensor Calibration ..........................	144
Fault Codes .....................................................................................	144
MID 128 PID 228 Road Speed Sensor Calibration, Check ..............	145
MID 128 PPID 86 Engine Brake Torque Percent ..............................	146
Fault Codes .....................................................................................	146
MID 128 PPID 86 Engine Brake Torque Percent, Check .................	147
MID 128 PPID 119 High Coolant Temperature .................................	148
Fault Codes .....................................................................................	148
MID 128 PPID 119 High Coolant Temperature, Check ....................	149
MID 128 PPID 122 VCB Engine Compression Brake ......................	151
D12B and D12C ..............................................................................	151
Fault Codes .....................................................................................	151
MID 128 PPID 122 VCB Engine Compression Brake, Check ..........	152
D12B and D12C ..............................................................................	152
MID 128 PPID 123 EPG 2 ................................................................	153
D12B and D12C ..............................................................................	153
Fault Codes .....................................................................................	153
MID 128 PPID 123 EPG 2, Check ....................................................	154
D12B and D12C ..............................................................................	154
MID 128 PPID 124 EPG 1 ................................................................	155
Fault Codes .....................................................................................	155
MID 128 PPID 124 EPG 1, Check ....................................................	156
MID 128 SID 1/2/3/4/5/6 Injector .....................................................	157
D12B and D12C ..............................................................................	157
Fault Codes .....................................................................................	157
MID 128 SID 1/2/3/4/5/6 Injector, Check ..........................................	159
D12B and D12C ..............................................................................	159
MID 128 SID 17 Fuel Shutoff Valve ..................................................	161
Fault Codes .....................................................................................	161
MID 128 SID 17 Fuel Shutoff Valve, Check ......................................	162
D7C only ..........................................................................................	162
MID 128 SID 20 Timing Sleeve .........................................................	163
D7C only ..........................................................................................	163
Fault Codes .....................................................................................	163
MID 128 SID 20 Timing Sleeve, Check ............................................	165
D7C only ..........................................................................................	165
MID 128 SID 21 Engine Position Timing Sensor ..............................	166
D12B and D12C ..............................................................................	166
Fault Codes .....................................................................................	166
MID 128 SID 21 Engine Position Timing Sensor, Check ..................	167
D12B and D12C ..............................................................................	167
MID 128 SID 21 Needle Lift Sensor .................................................	168
Fault Codes .....................................................................................	168
MID 128 SID 21 Needle Lift Sensor, Check .....................................	169
D7C only ..........................................................................................	169
MID 128 SID 22 Engine Speed Sensor ............................................	170
Fault Codes .....................................................................................	170
MID 128 SID 22 Engine Speed Sensor, Check ................................	171
MID 128 SID 23 Rack Actuator .........................................................	172
D7C only ..........................................................................................	172
Fault Codes .....................................................................................	172
MID 128 SID 23 Rack Actuator, Check .............................................	174
D7C only ..........................................................................................	174

3

MID 128 SID 24 Rack Position Sensor .............................................	175
D7C only ..........................................................................................	175
Fault Codes .....................................................................................	175
MID 128 SID 24 Rack Position Sensor, Check .................................	176
D7C only ..........................................................................................	176
MID 128 SID 33 Fan Control .............................................................	177
Fault Codes .....................................................................................	177
MID 128 SID 33 Fan Control, Check ................................................	178
MID 128 SID 64 Redundant Engine Speed Sensor .........................	179
D7C only ..........................................................................................	179
Fault Codes .....................................................................................	179
MID 128 SID 64 Redundant Engine Speed Sensor, Check .............	180
D7C only ..........................................................................................	180
MID 128 SID 70 Preheater Element 1 ..............................................	181
Fault Codes .....................................................................................	181
MID 128 SID 70 Preheater Element 1, Check ..................................	182
MID 128 SID 71 Preheater Element 2 ..............................................	183
D12B only ........................................................................................	183
Fault Codes .....................................................................................	183
MID 128 SID 71 Preheater Element 2, Check ..................................	184
D12B ................................................................................................	184
MID 128 SID 230 Idle Validation Switch 1 ........................................	185
Fault Codes .....................................................................................	185
MID 128 SID 230 Idle Validation Switch 1, Check ............................	186
MID 128 SID 231 SAE J1939 Control Link .......................................	187
Fault Codes .....................................................................................	187
MID 128 SID 232 5 Volt DC Supply ..................................................	189
Fault Codes .....................................................................................	189
MID 128 SID 232 5 Volt DC Supply, Check ......................................	190
MID 128 SID 240 Program Memory .................................................	191
Fault Codes .....................................................................................	191
MID 128 SID 250 SAE J1587/1708 Information Link .......................	192
Fault Codes .....................................................................................	192
MID 128 SID 253 Data Set Memory EEPROM ................................	193
Fault Codes .....................................................................................	193
MID 128 SID 254 Engine Electronic Control Unit (EECU) ...............	194
Fault Codes .....................................................................................	194
MID 144 VECU ....................................................................................	196
MID 144 Fault Code Table ................................................................	196
MID 144 PID 29 Second Accelerator Pedal Position Sensor ...........	198
Fault Codes .....................................................................................	198
MID 144 PID 29 Second Accelerator Pedal Position Sensor, Check	199
MID 144 PID 84 Road Speed ...........................................................	201
Fault Codes .....................................................................................	201
MID 144 PID 84 Road Speed, Check ...............................................	202
MID 144 PID 91 Accelerator Pedal Position .....................................	204
Fault Codes .....................................................................................	204
MID 144 PID 91 Accelerator Pedal Position, Check .........................	205
MID 144 PID 152 VECU, Number of Resets ....................................	207
Fault Codes .....................................................................................	207
MID 144 PPID 69 Idle Validation Switch ...........................................	208
Fault Codes .....................................................................................	208
MID 144 PPID 69 Idle Validation Switch, Check ..............................	209
MID 144 PPID 70 Pedal Switches, Supply .......................................	211
Fault Codes .....................................................................................	211

4

MID 144 PPID	70 Pedal Switches, Supply, Check ...........................	212
MID 144 PPID 71 Cruise Control and Engine Brake, Supply Switch		215
Fault Codes	.....................................................................................	215
MID 144 PPID	71 Cruise Control and Engine Brake, Supply
Switch, Check	....................................................................................	216
MID 144 PPID .....................	72 Accelerator Pedal, Supply Sensors	220
Fault Codess ...................................................................................		220
MID 144 PPID .........	72 Accelerator Pedal, Supply Sensors, Check	221
MID 144 PPID ........	73 Second Accelerator Pedal, Supply Sensors	223
Fault Codes .....................................................................................		223
MID 144 PPID	73 Second Accelerator Pedal, Supply Sensors,
Check .................................................................................................		224
MID 144 PPID ...............	75 Range Inhibitor, Solenoid Valve Status	226
Fault Codes .....................................................................................		226
MID 144 PPID	75 Range Inhibitor, Solenoid Valve Status, Check ... 227
MID 144 SID 230 ........................................Idle Validation Switch 1		229
Fault Codes .....................................................................................		229
MID 144 SID 230 ............................Idle Validation Switch 1, Check		230
MID 144 SID 231 .......................................SAE J1939 Control Link		232
Fault Codes .....................................................................................		232
MID 144 SID 231 ..........................SAE J1939 Control Link, Check		233
MID 144 SID 240 .................................................Program Memory		234
Fault Codes .....................................................................................		234
MID 144 SID 243 ....................................Cruise Control Set Switch		235
Fault Codes .....................................................................................		235
MID 144 SID 243 .......................Cruise Control Set Switch, Check		236
MID 144 SID 250 .......................SAE J1587/1708 Information Link		238
Fault Codes .....................................................................................		238
MID 144 SID 250 ...........SAE J1587/1708 Information Link, Check		239
MID 144 SID 253 ................................Data Set Memory EEPROM		240
Fault Codes .....................................................................................		240
MID 144 PSID .........................................	3 Idle Validation Switch 3	241
Fault Codes .....................................................................................		241
MID 144 PSID .............................	3 Idle Validation Switch 3, Check	242
Service Procedures ...........................................................................		245
Engine ECU, Replacement ................................................................		245
Feedback
Operation Numbers

5

6

Group 28

General

General

Vehicle Management System

W2002520

This information covers the Vehicle Management System, which includes VECTRO II electronics, the vehicle ECU, and other control systems used in the vehicle.

7

Group 28

General

Engine Control System Glossary

ATA

American Trucking Association

ATDC (After Top Dead Center)

The 180 of crankshaft rotation after the piston reaches top center (normal direction of rotation).

AC (Alternating Current)

An electrical current that alternates level and direction.

BTDC (Before Top Dead Center)

The 180 of crankshaft rotation before the piston reaches top center (normal direction of rotation).

INFO lamp

Light that warns the operator of an active diagnostic fault code; also referred to as the diagnostic lamp.

Data link

An electrical connection for communication with other microprocessor-based devices (such as powertrain control, trip recorders and maintenance systems) that are compatible with the ATA and SAE standard.

Diagnostic fault code

These codes indicate an electronic system malfunction, indicating a problem with the D12 electrical systems.

Diagnostic flash code

Codes flashed out in a series via the INFO lamp to indicate an active fault code.

DC (Direct Current)

An electrical current that flows in one direction only.

EEPROM (Electrical Erasable Programmable Read

Only Memory)

The contents of this type of memory may be electronically erased and new information programmed into the device.

EECU (Engine Electronic Control Unit)

The computer that controls the power supplied to the engine electronics, monitors and governs engine functions.

EUI (Electronic Unit Injector)

An injector pump which is mechanically activated and electronically controlled. It combines metering and injecting in a single unit.

Engine brake disable system

During the time ABS (anti-lock braking system) is active, the engine brake is disabled.

FMI (Failure Mode Identifier)

Numbers and names used to identify how a system or part failed.

FMI	Description
0	Data valid but above normal operating range
1	Data valid but below normal operating range
2	Data erratic, intermittent, or incorrect
3	Voltage above normal
4	Voltage below normal
5	Current below normal or open circuit
6	Current above normal or short circuit
7	Mechanical system not responding properly
8	Abnormal frequency, pulse rate or period
9	Abnormal update
10	Abnormal rate of change
11	Failure mode not identifiable
12	Defective device or component
13	Uncalibrated device or component
14/15	Reserved for future assignment

Hz (Hertz)

Measure of frequency in cycles per second.

MID

Message Identification Description

Open circuit

Condition where an electrical wire or connector is broken, preventing signal or supply voltage from reaching its intended destination.

Parameter

A programmable value that affects the characteristics or behavior of the engine and/or vehicle.

8

Group 28

General

PID

Parameter Identification code.

PTO (Power Takeoff)

Operated with the cruise control switches, this mode permits setting a constant engine rpm when the vehicle is not moving.

PWM (Pulse Width Modulation)

A signal consisting of variable-width pulses at fixed intervals to vary; “TIME ON” versus versus “TIME OFF.”

RAM (Random Access Memory)

A memory that has stored information immediately available when addressed.

Reference voltage

A regulated voltage supplied by the EECU to a sensor, which uses it to generate a signal voltage.

Password

A group of seven alphanumeric characters designed to restrict access to level-2 parameters. The password is automatically defaulted to seven empty spaces if customer has not specified password.

SAE

Society of Automotive Engineers.

Short circuit

A connection of comparatively low resistance, accidentally or intentionally made between two points on a circuit.

SID

Subsystem Identification code.

Signal

A voltage value used to transmit information typically from a sensor to the EECU.

Supply voltage

A constant voltage that supplies electrical power to a component. It may be generated by the EECU or supplied by the vehicle battery.

Throttle Position Sensor (TPS)

An electronic sensor that is connected to the accelerator pedal and sends a Pulse Width Modulated signal to the EECU.

Vehicle Specification Programming (VSP)

VSP consists of two levels of programming: engine configuration (level 1) and customer parameters (level 2).

Vehicle Speed Sensor (VSS)

An electromagnetic device that measures vehicle speed from the rotation of gear teeth in the drivetrain of the vehicle.

VEB (Volvo Engine Brake)

Consists of a compression brake (VCB) and an exhaust pressure governor (EPG).

9

Group 28

Specifications

Specifications

Description of Signals

EECU (D7C) and Breakout Box Connected in Series Between EECU and Wiring Harness

For the measurements below, the following applies:

•Breakout box J-41132 connected between connector EA or EB and the EECU.

•Jumper harness J–43233 connected between connector EA or EB and the EECU.

•The EECU connected.

•Ignition key in ON position.

•Engine not running.

•Measuring voltage.

W2002710

Fig. 3: EECU voltage check, EB

W2003555

Fig. 1: EECU with pinouts

W2002712

Fig. 2: EECU voltage check, EA

B+ = battery voltage

Connec-	Signal type	Measuring points	Ignition key in the ON position		Other
tion
EA1	Oil temperature sensor, signal	EA1 - EA5	3.0	V (+20 C/68 F)
			0.4	V (+100 C/212 F)
EA2	Intake manifold temperature sensor,	EA2 - EA5	2.6	V (+20 C/68 F)
	signal		1.6	V (+40 C/104 F)
EA3	Intake manifold pressure sensor, sig-	EA3 - EA5	1.1	V (sea level)
	nal
EA4	Supply to sensors (5 V), +	EA4 - EA5	4.8	- 5.15 V
EA5	Signal ground to sensors, -
EA6	Not currently used
EA7	Redundant engine speed sensor, +
EA8	Rack drive PWM, +
EA9	Timing sleeve PWM, +

10

Group 28				Specifications
Connec-	Signal type	Measuring points	Ignition key in the ON position	Other
tion
EA10	Rack drive PWM, -
EA11	Not currently used
EA12	Not currently used
EA13	Fuel temperature sensor, signal	EA13 - EA5	3.0 V (+20 C/68 F)
			2.0 V (+40 C/104 F)
EA14	Oil pressure sensor, signal	EA14 - EA5	0.5 V (for cold engines)
EA15	Needle lift sensor, +
EA16	Rack position sensor, search coil
EA17	Rack position sensor, common
EA18	Redundant engine speed sensor, -
EA19	Not currently used
EA20	Not currently used
EA21	Timing sleeve PWM, -
EA22	Not currently used
EA23	Not currently used
EA24	Not currently used
EA25	Coolant temperature sensor, signal	EA25 - EA5	3.0 V (+20 C/68 F)
			0.6 V (+85 C/185 F)
EA26	Not currently used
EA27	Fuel pressure sensor, signal	EA27-EA5	≈ 0.5V (for cold engines)	D12 C
EA28	Needle lift sensor, -
EA29	Rack position sensor, reference coil
EA30	Engine speed sensor (crank), +
EA31	Engine speed sensor (crank), -
EA32	Not currently used
EA33	Not currently used
EA34	Not currently used
EA35	Not currently used
EA36	Not currently used
EB1	SAE J1939 A Communications link	EB1/EB9	≈2-5V
EB2	SAE J1939 B Communications link	EB2/EB9	≈0-3V
EB3	Ambient air temperature sensor, sig-	EB3 - EB13	2.6 V (+20 C/68 F)
	nal		1.2 V (+50 C/122 F)
EB4	Buffered idle validation switch	EB4 - EB9	< 4 V (idle)
			> 8 V (off idle)
EB5	Pre-heat sense 1	EB5 - EB9	55 % of B+ (open)	Normally closed with
			0 V (closed)	the ignition key in the
				ON position.
EB6	Not currently used

11

Group 28				Specifications
Connec-	Signal type	Measuring points	Ignition key in the ON position	Other
tion
EB7	Coolant level sensor, signal	EB7 - EB8	80% B+ (open)	Applies to WX and
			0 V (closed)	VN. Normally open
				with the ignition key in
				the ON position.
EB8	Signal ground to sensors, -
EB9	EECU ground, -
EB10	EECU ground, -
EB11	EECU B+	EB11 - EB9	B+
EB12	EECU B+	EB12 - EB10	B+
EB13	Ambient air temperature sensor
EB14	Not currently used
EB15	Not currently used
EB16	Not currently used
EB17	Air filter indicator sensor signal
EB18	Not currently used
EB19	Not currently used
EB20	Not currently used
EB21	Fan control (if equipped with on/off	EB21 - EB9	B+ (fan on)	Normally ON with the
	fan)		0 V (fan off)	ignition key in the ON
				position.
EB22	Not currently used
EB23	Not currently used
EB24	EOL Enable	EB24 - EB9	< 6 V or O/C (EOL Disable)
			> 9.6 V (EOL Enable)
EB25	SAE J1587A/J1708A Information link	EB25-EB9	≈ 0-5V
EB26	SAE J1587B/J1708B Information link	EB26-EB9	≈ 0-5V
EB27	Not currently used
EB28	Not currently used
EB29	Not currently used
EB30	Not currently used
EB31	Pre-heating relay, Coil ground	EB31 - EB9	B+ (pre-heat off)	Normally ON with the
			0 V (pre-heat on)	ignition key in the ON
				position.
EB32	Not currently used
EB33	Not currently used
EB34	Fuel shut-off valve	EB34 - EB9	0 V (valve on)	Normally ON with the
			> 1.0V (valve off)	ignition key in the ON
				position.
EB35	EPG 1	EB35 - EB9	B+ (EPG off)	Normally OFF with
			0 V (EPG on)	the ignition key in the
				ON position.
EB36	Not currently used

12

Group 28

Specifications

EECU, D7C, with Breakout Box Connected to Wiring Harness Only

For the measurements below, the following applies:

•Breakout box J-41132 connected to connector EA or EB.

•The EECU is not connected.

•Ignition key must be in the OFF position.

•Measuring resistance.

W2002713

	W2002711		Fig. 5: EECU harness checks, EB
Fig. 4: EECU harness checks, EA
Connec-	Signal type	Measuring points		Ignition key in the OFF position	Other
tion
EA1	Oil temperature sensor, signal	EA1 / EA5		1.9 k (+20 C/68 F)
				100 (+100 C/212 F)
EA2	Intake manifold temperature sensor,	EA2 / EA5		6.2 k (+20 C/68 F)
	signal			2.5 k (+40 C/104 F)
EA3	Intake manifold pressure sensor, sig-
	nal
EA4	Sensor supply to (5 V), +
EA5	Sensors ground , -
EA6	Not currently used
EA7	Redundant engine speed sensor, +	EA7 / EA18		775 - 945
EA8	Rack drive PWM, +	EA8 / EA10		1.5
		EA8 / alternate		open circuit
		ground
EA9	Timing sleeve PWM, +	EA9 / EA21		1.5
		EA9 / alternate		open circuit
		ground
EA10	Rack drive PWM, -	EA10 / alternate		open circuit (see also EA8)
		ground
EA11	Not currently used
EA12	Not currently used
EA13	Fuel temperature sensor, signal	EA13 / EA5		1.9 k (+20 C/68 F)
				800 (+40 C/104 F)
EA14	Oil pressure sensor, signal
EA15	Needle lift sensor, +	EA15 / EA28		65 - 165
EA16	Rack position sensor, search coil	EA16 / EA17		20.0
EA17	Rack position sensor, common
EA18	Redundant engine speed sensor, -	EA18 / EA7		775 - 945
EA19	Not currently used

13

Group 28				Specifications
Connec-	Signal type	Measuring points	Ignition key in the OFF position	Other
tion
EA20	Not currently used
EA21	Timing sleeve PWM, -	EA21 / alternate	open circuit (see also EA9)
		ground
EA22	Not currently used
EA23	Not currently used
EA24	Not currently used
EA25	Coolant temperature sensor, signal	EA25 / EA5	1.9 k (+20 C/68 F)
			160 (+85 C/185 F)
EA26	Not currently used
EA27	Fuel pressure sensor			D12 C
EA28	Needle lift sensor, -
EA29	Rack position sensor, reference coil	EA29 / EA17	20.0
EA30	Engine speed sensor (crank), +	EA30 / EA31	775 - 945
EA31	Engine speed sensor (crank), -	EA31 / EA30	775 - 945
EA32	Not currently used
EA33	Not currently used
EA34	Not currently used
EA35	Not currently used
EA36	Not currently used
EB1	SAE J1939A Communications link
EB2	SAE J1939B Communications link
EB3	Ambient air temperature sensor, sig-	EB3 / EB13	6.2 k (+20 C/68 F)
	nal		1.7 k (+50 C/122 F)
EB4	Buffered idle validation switch
EB5	Pre-heat sense 1	EB5 / EB9	open circuit (open)
			< 5 (closed)
EB6	Not currently used
EB7	Coolant level sensor, signal	EB7 / EB8	open circuit (coolant level normal)	Applies to WX and VN
			<1 (coolant level low)
EB8	Sensor ground
EB9	EECU ground, -
EB10	EECU ground, -
EB11	EECU, B+
EB12	EECU, B+
EB13	Ambient air temperature ground
EB14	Not currently used
EB15	Not currently used
EB16	Not currently used
EB17	Air filter indicator sensor signal
EB18	Not currently used
EB19	Not currently used
EB20	Not currently used
EB21	Not currently used
EB22	Not currently used
EB23	Not currently used
EB24	EOL Enable	EB24/EB9	open circuit (open)

14

Group 28				Specifications
Connec-	Signal type	Measuring points	Ignition key in the OFF position	Other
tion
		EB25 / (connection	<1
		A in 6 pin diagnos-
EB25	SAE J1587/J1708 A Information link	tics connector)
		EB25 / (connection	<1
		F in 9 pin diagnos-
		tics connector)
EB26	SAE J1587/J1708 B Information link	EB26 / (connection	<1
		B in the 6 pin diag-
		nostics connector)
		EB26 / (connection	<1
		G in the 9 pin diag-
		nostics connector)
EB27	Not currently used
EB28	Not currently used
EB29	Not currently used
EB30	Not currently used
EB31	Pre-heating relay, coil ground
EB32	Not currently used
EB33	Not currently used
EB34	Fuel shut-off valve, include
EB35	EPG 1, -
EB36	Not currently used

15

Group 28

Specifications

EECU (D12B and D12C), Breakout Box Connected in Series Between EECU and Wiring Harness

For the measurements below, the following applies:

•Breakout box J-41132 connected between connector EA or EB and the EECU.

•Jumper harness J43233 connected between connector EA or EB and the EECU.

•

•

•

•

The EECU connected.

Ignition key in ON position.

Engine not running.

Measuring voltage.

W2002710

W2002712

Fig. 6: EECU voltage check, EA

Fig. 7: EECU voltage check, EB

B+ = battery voltage

Connec-	Signal type	Measuring points	Ignition key in the ON position		Other
tion
EA1	Oil temperature sensor, signal	EA1 / EA5	3.0	V (+20 C/68 F)
			0.4	V (+100 C/212 F)
EA2	Intake manifold temperature sensor,	EA2 / EA5	2.6	V (+20 C/68 F)
	signal		1.6	V (+40 C/104 F)
EA3	Intake manifold pressure sensor, sig-	EA3 / EA5	1.1	V (sea level)
	nal
EA4	Sensor supply (5 V), +	EA4 / EA5	4.8	- 5.15 V
EA5	Sensor ground
EA6	Not currently used
EA7	Engine position sensor (cam), +
EA8	Not currently used
EA9	Not currently used
EA10	Not currently used
EA11	Unit injector cylinder 1, -
EA12	Unit injector cylinder 1, 2, 3 (90
	Volt), +
EA13	Fuel temperature sensor, signal				D12 C
EA14	Oil pressure sensor, signal	EA14 / EA5	0.5	V (for cold engines)
EA15	Not currently used

16

Group 28				Specifications
Connec-	Signal type	Measuring points	Ignition key in the ON position	Other
tion
EA16	Not currently used
EA17	Not currently used
EA18	Engine position sensor (cam), -
EA19	Not currently used
EA20	Not currently used
EA21	Not currently used
EA22	Unit injector cylinder 2, -
EA23	Unit injector cylinder 3, -
EA24	Unit injector cylinder 4, 5, 6 (90
	Volt), +
EA25	Coolant temperature sensor, signal	EA25 / EA5	3.0 V (+20 C/68 F)
			0.6 V (+85 C/185 F)
EA26	Not currently used
EA27	Fuel pressure sensor			D12 C
EA28	Not currently used
EA29	Not currently used
EA30	Engine speed sensor (crank), +
EA31	Engine speed sensor (crank), -
EA32	Not currently used
EA33	VCB, -	EA33 / alternate	B+ (VCB off)	Normally OFF with
		ground	0 V (VCB on)	the ignition key in the
				ON position.
EA34	Unit injector cylinder 4, -
EA35	Unit injector cylinder 5, -
EA36	Unit injector cylinder 6, -
EB1	SAE J1939 Communications link,	EB1/EB9	≈ 2-5V
	can HI
EB2	SAE J1939 Communications link,	EB2/EB9	≈ 0-3V
	can LOW
EB3	Ambient air temperature sensor, sig-	EB3 / EB13	2.6 V (+20 C/68 F)
	nal		1.2 V (+50 C/122 F)
EB4	Buffered idle validation switch	EB4 / EB9	< 4 V (inactive)
			> 8 V (active)
EB5	Pre-heat sense 1 (if equipped)	EB5 / EB9	55% of B+ (open)	Normally closed with
			0 V (closed)	the ignition key in the
				ON position.
EB6	Not currently used
EB7	Coolant level sensor, signal	EB7 / EB8	80% B+ (open)	VN and VHD. Nor-
			0 V (closed)	mally open with the
				ignition key in the ON
				position.
EB8	Sensor ground
EB9	EECU ground, -
EB10	EECU ground, -

17

Group 28				Specifications
Connec-	Signal type	Measuring points	Ignition key in the ON position	Other
tion
EB11	EECU B+	EB11 / EB9	B+
EB12	EECU B+	EB12 / EB10	B+
EB13	Ambient air temperature sensor
EB14	Not currently used
EB15	Not currently used
EB16	Pre-heat sensor 2 (if equipped)	EB16 / EB9	55 % of B+ (open)	Normally closed with
			0 V (closed)	the ignition key in the
				ON position.
EB17	Air filter indicator sensor signal
EB18	Not currently used
EB19	Not currently used
EB20	Not currently used
EB21	Engine fan control (if equipped with	EB21 / EB9	B+ (fan on/solenoid inactive)	Normally ON with the
	on/off fan), -		0 V (fan off/solenoid active)	ignition key in the ON
				position.
EB22	Not currently used
EB23	Not currently used
EB24	EOL Enable	EB24 / EB9	< 6 V or O/C (EOL disable)
			> 9.6 V (EOL Enable)
EB25	SAE J1587/J1708 + Information link
EB26	SAE J1587/J1708 - Information link	EB25/EB9	≈ 0-5V
EB27	Not currently used	EB26/EB9	≈ 0-5V
EB28	Not currently used
EB29	Not currently used
EB30	Not currently used
EB31	Pre-heating relay coil ground (if	EB31 / EB9	B+ (pre-heat off)	Normally OFF with
	equipped)		0 V (pre-heat on)	the ignition key in the
				ON position.
EB32	Not currently used
EB33	Not currently used
EB34	Not currently used
EB35	EPG 1	EB35 / EB9	B+ (EPG off)	Normally OFF with
			0 V (EPG on)	the ignition key in the
				ON position.
EB36	EPG 2	EB36 / EB9	B+ (EPG off)	Normally OFF with
			0 V (EPG on)	the ignition key in the
				ON position.

18

Group 28

Specifications

EECU (D12B and D12C), Breakout Box Connected to Wiring Harness Only

For the measurements below, the following applies:

•Breakout box J-41132 connected to connector EA or EB.

•

•

•

The EECU not connected.

Ignition key must be in the OFF position.

Measuring resistance.

				W2002713
	W2002711		Fig. 9: EECU harness checks, EB
Fig. 8: EECU harness checks, EA
Connec-	Signal type	Measuring points		Ignition key in the OFF position	Other
tion
EA1	Oil temperature sensor, signal	EA1 / EA5		1.9 k (+20 C/68 F)
				100 (+100 C/212 F)
EA2	Intake manifold temperature sensor,	EA2 / EA5		6.2 k (+20 C/68 F)
	signal			2.5 k (+40 C/104 F)
EA3	Intake manifold pressure sensor, sig-
	nal
EA4	Sensor supply (5 V), +
EA5	Sensor ground
EA6	Not currently used
EA7	Engine position sensor (cam), +	EA7 / EA18		775 - 945
EA8	Not currently used
EA9	Not currently used
EA10	Not currently used
EA11	Unit injector cylinder 1, -	EA11 / EA12		1.5 - 2.0
EA12	Unit injector cylinder 1, 2, 3 (90			see EA11, EA22 and EA23
	Volt), +
EA13	Fuel temperature sensor, signal				D12 C
EA14	Oil pressure sensor, signal
EA15	Not currently used
EA16	Not currently used
EA17	Not currently used
EA18	Engine position sensor (cam), -			see EA7
EA19	Not currently used
EA20	Not currently used

19

Group 28				Specifications
Connec-	Signal type	Measuring points	Ignition key in the OFF position	Other
tion
EA21	Not currently used
EA22	Unit injector cylinder 2, -	EA22 / EA12	1.5 - 2.0
EA23	Unit injector cylinder 3, -	EA23 / EA12	1.5 - 2.0
EA24	Unit injector cylinder 4, 5, 6 (90		see EA34, EA35, and EA36
	Volt), +
EA25	Coolant temperature sensor, signal	EA25 / EA5	1.9 k (+20 C/68 F)
			160 (+85 C/185 F)
EA26	Fuel pressure sensor, signal			D12 C
EA27	Not currently used
EA28	Not currently used
EA29	Not currently used
EA30	Engine speed sensor (crank), +	EA30 / EA31	775 - 945
EA31	Engine speed sensor (crank), -	EA31 / EA30	775 - 945
EA32	Not currently used
EA33	VCB, -
EA34	Unit injector cylinder 4, -	EA34 / EA24	1.5 - 2.0
EA35	Unit injector cylinder 5, -	EA35 / EA24	1.5 - 2.0
EA36	Unit injector cylinder 6, -	EA36 / EA24	1.5 - 2.0
EB1	SAE J1939 + Communications link
EB2	SAE J1939 - Communications link
EB3	Ambient air temperature sensor, sig-	EB3 / EB13	6.2 k (+20 C/68 F)
	nal		1.7 k (+50 C/122 F)
EB4	Buffered idle validation switch
EB5	Pre-heat sense 1 (if equipped)	EB5 / EB9	open circuit (open)
			< 5.0 (closed)
EB6	Not currently used
EB7	Coolant level sensor, signal	EB7 / EB8	open circuit (coolant level normal)	Applies to WX , VN
			<1 ; closed (coolant level low)	and VHD
EB8	Sensors ground
EB9	EECU ground, -
EB10	EECU ground, -
EB11	EECU B+
EB12	EECU B+
EB13	Ambient air temperature sensor
EB14	Not currently used
EB15	Not currently used
EB16	Pre-heat sensor 2 (if equipped)	EB16 / EB9	open circuit (open)
			< 5.0 (closed)
EB17	Air filter indicator sensor signal
EB18	Not currently used
EB19	Not currently used

20

Group 28				Specifications
Connec-	Signal type	Measuring points	Ignition key in the OFF position	Other
tion
EB20	Not currently used
EB21	Engine fan control (if equipped with
	on/off fan)
EB22	Not currently used
EB23	Not currently used
EB24	EOL Enable	EB24/EB9	Open circuit(open)
		EB25 / (connection	<1
		A in the 6 pin diag-
		nostics connector)
EB25	SAE J1587/J1708 A Information link
		EB25 / DCA (con-	<1
		nection F in the 9
		pin diagnostics con-
		nector)
		EB26 / (connection	<1
		B in the 6 pin diag-
EB26	SAE J1587/J1708 B Information link	nostics connector)
		EB26 / (connection	<1
		G in the 9 pin diag-
		nostics connector)
EB27	Not currently used
EB28	Not currently used
EB29	Not currently used
EB30	Not currently used
EB31	Preheating relay coil ground (if
	equipped)
EB32	Not currently used
EB33	Not currently used
EB34	Not currently used
EB35	EPG 1, -
EB36	EPG 2, -

21

Group 28

Pinouts

Engine Electronic Control Unit (EECU)

VOLVO D12B/D12C EECU/EA Connector

Cavity		Color		Description
1		GN		OIL TEMPERATURE
2		BL/W		BOOST TEMPERATURE
3		GR		BOOST PRESSURE
4		GN/W		BOOST & OIL PRESSURE COMMON (+)
5		BN/W		PRESSURE & TEMP. SENSOR COMMON
				(-)
6				NOT USED
7		Y		ENGINE POSITION SENSOR, CAM (+)
8-10				NOT USED
11		W		INJECTOR, CYL 1 (-)
12		W		CYL 1, CYL 2, CYL 3 INJECTOR COM-
				MON, 90 Volt (+)
13		GN		FUEL TEMPERATURE (D12C)
14		BN		OIL PRESSURE
15-17				NOT USED
18		BN/W		ENGINE POSITION SENSOR, CAM (-)
19-21				NOT USED
22		W		INJECTOR, CYL 2 (-)
23		W		INJECTOR, CYL 3 (-)
24		W		CYL 4, CYL 5, CYL 6 INJECTOR COM-
				MON, 90 Volt (+)
25		Y/W		COOLANT TEMPERATURE
26				NOT USED
27		BN		FUEL PRESSURE (D12C)
28-29				NOT USED
30		BL/SB		ENGINE SPEED SENSOR, CRANK (+)
31		BL/R		ENGINE SPEED SENSOR, CRANK (-)
32				NOT USED
33		GN/W		VCB SOLENOID VALVE RETURN
34		W		INJECTOR, CYL 4 (-)
35		W		INJECTOR, CYL 5 (-)
36		W		INJECTOR, CYL 6 (-)
Wire Colors:		BL	BLUE		R	RED
		BN	BROWN		SB	SOLID BLACK
		GN	GREEN		VO	VIOLET
		GR	GRAY		W	WHITE
		OR	ORANGE		Y	YELLOW
		P	PINK

Specifications

W3000945

22

Group 28 Specifications

VOLVO D12B/D12C EECU/EB Connector
Cavity		Color		Description
1		Y		DATA LINK J1939 CAN HI
2		GN		DATA LINK J1939 CAN LO
3		BL/Y		AMBIENT AIR TEMPERATURE
							W3000945
4		P		BUFFERED IDLE VALIDATION
				SWITCH
5		R		PREHEAT SENSE 1
6				NOT USED
7		BL/SB		COOLANT LEVEL WARNING
8		GR/W		AIR FILTER, COOL LVL COMMON
9		W		GROUND (-)
10		W		GROUND (-)
11		R/SB		POWER SUPPLY (+)
12		R/SB		POWER SUPPLY (+)
13		V0/W		AMBIENT AIR TEMP COMMON (-)
14-15				NOT USED
16		R/W		PREHEAT SENSE 2
17		BL/R		AIR FILTER INDICATOR
18-20				NOT USED
21		GR/R		COOLING FAN CONTROL (-)
22-23				NOT USED
24		Y/SB		FACTORY PROGRAMMING (NOT
				USED)
25		GR		DATA LINK J1708/1587 (+)
26		OR		DATA LINK J1708/1587 (-)
27-30				NOT USED
31		BL/R		PREHEAT RELAY(Coil Ground)
32-34				NOT USED
35		GR/SB		EPG1 CONTROL
36		GR/W		EPG2 CONTROL
Wire Colors:		BL	BLUE		R	RED
		BN	BROWN		SB	SOLID BLACK
		GN	GREEN		VO	VIOLET
		GR	GRAY		W	WHITE
		OR	ORANGE		Y	YELLOW
		P	PINK

23

Group 28 Specifications

	VOLVO D7C EECU/EA Connector
Cavity	Color	Description
1	GN	OIL TEMPERATURE
2	BL/W	BOOST TEMPERATURE
					W3000945
3	GR	BOOST PRESSURE
4	GN/W	BOOST, OIL & FUEL PRESSURE COMMON (+)
5	BN/W	PRESSURE & TEMP. SENSOR COMMON
6		NOT USED
7	Y	REDUNDANT ENGINE SPEED SENSOR (+)
8	Y/R	RACK DRIVE, PWM (+)
9	Y/SB	TIMING SLEEVE, PWM
10	GN/BN	RACK DRIVE, PWM (-)
11-12		NOT USED
13	GN/BN	FUEL TEMPERATURE
14	BN	OIL PRESSURE
15	GR/SB	NEEDLE LIFT SENSOR(+)
16	BL/R	RACK POSITION SENSOR, SEARCH COIL
17	Y/GR	RACK POSITION SENSOR, COMMON
18	BN/W	REDUNDANT ENGINE SPEED SENSOR (-)
19-20		NOT USED
21	OR	TIMING SLEEVE, PWM (-)
22-24		NOT USED
25	Y/W	COOLANT TEMPERATURE
26		NOT USED
27	BN	FUEL PRESSURE
28	GR/R	NEEDLE LIFT SENSOR (-)
29	Y/W	RACK POSITION SENSOR, REFERENCE COIL
30	BL/SB	ENGINE SPEED SENSOR, CRANK(+)
31	BL/R	ENGINE SPEED SENSOR, CRANK(-)
32-36		NOT USED
Wire Colors: BL		BLUE	R	RED
	BN	BROWN	SB	SOLID BLACK
	GN	GREEN	VO	VIOLET
	GR	GRAY	W	WHITE
	OR	ORANGE	Y	YELLOW
	P	PINK

24

Group 28 Specifications

VOLVO D7C EECU/EB Connector
Cavity		Color		Description
1		Y		DATA LINK J1939 CAN HI
2		GN		DATA LINK J1939 CAN LO
3		BL/Y		AMBIENT AIR TEMPERATURE
							W3000945
4		P		BUFFERED IDLE VALIDATION
				SWITCH
5		R		PREHEAT SENSE 1
6				NOT USED
7		BL/SB		COOLANT LEVEL WARNING
8		GR/W		AIR FILTER, COOL LEVEL COM-
				MON (-)
9		W		GROUND (-)
10		W		GROUND (-)
11		R/SB		POWER SUPPLY (+)
12		R/SB		POWER SUPPLY (+)
13		V0/W		AMBIENT AIR TEMP COMMON (-)
14-16				NOT USED
17		BL/R		AIR FILTER INDICATOR
18-23				NOT USED
24		Y/SB		FACTORY PROGRAMMING (NOT
				USED)
25		GR		DATA LINK J1708/1587 (+)
26		OR		DATA LINK J1708/1587 (-)
27-30				NOT USED
31		BL/R		PREHEAT RELAY, CONTROL
32-33				NOT USED
34		Y/BN		FUEL SHUTOFF VALVE CONTROL
35		GR		EPG1
36				NOT USED
Wire Colors:		BL	BLUE		R	RED
		BN	BROWN		SB	SOLID BLACK
		GN	GREEN		VO	VIOLET
		GR	GRAY		W	WHITE
		OR	ORANGE		Y	YELLOW
		P	PINK

25

Group 28

Pinouts

Vehicle Electronic Control Unit(VECU)

Vehicle ECU Connector A-(GREEN)

Cavity	Circuit	Description
1	564A	CC/PTO SWITCH SET(-) INPUT
2	563A	CC/PTO SWITCH SET(+) INPUT
3	562A	CC/PTO SWITCH ON INPUT
4		NOT USED
5	567B	SERVICE BRAKE SWITCH INPUT
6	284-A	12V STARTER CONTROL SOLE-
		NOID FEED
7	245	ENGINE PREHEAT CIRCUIT PRO-
		TECTION FEED
8	571	CLUTCH SWITCH INPUT
9	385-A	PARK CONTROL WIPER MOTOR
10	388	INTERMITTENT WIPER INPUT
11	387-C	SWITCH TO WASHER MOTOR
12	0XE	ELECTRONIC GROUND
13	18V	ELECTRONIC ENGINE SWITCHED
		BATTERY FEED
14	196V	IGNITION SWITCH DR FEED
15-18		NOT USED
19	300D	MANUAL FAN SWITCH INPUT
20	629	ENGINE BRAKE MEDIUM FEED
21	628	ENGINE BRAKE LOW FEED
22		NOT USED
23	555	IDLE VALIDATION INPUT
24	682	HIGH REFRIGERANT PRESSURE
		SWITCH FEED
25-28		NOT USED
29	573	PTO SWITCH ON INPUT
30	565A	CC/PTO SWITCH RESUME INPUT

Specifications

W3002689

26

Group 28

Specifications

Vehicle ECU Connector B-(BLUE)

Cavity	Circuit	Description
1		NOT USED
2	312A	TRANSMISSION AREA INHIBITOR
		VALVE RETURN
3-4		NOT USED
5	597	ECU COMMON 12V OUTPUT
6	550	VEHICLE SPEED INPUT
7		NOT USED
8	553	THROTTLE POSITION SENSOR IN-
		PUT
9		NOT USED
10	552	THROTTLE POSITION SENSOR
		SUPPLY
11	581	PARKING BRAKE SWITCH INPUT
12-14		NOT USED
15	583	POWER CONTROL FROM ENGINE
		ECU
16	389B	INTERMITTENT WIPER RELAY
		COIL RETURN
17	555A	IDLE VALIDATION FROM ENGINE
		ECU
18	312C	RANGE INHIBITOR VALVE RETURN
19	558	ECU COMMON +12V OUTPUT
20	551	VEHICLE SPEED RETURN FROM
		ECU
21	317B	TRANSMISSION LOW RANGE INDI-
		CATOR SIGNAL
22	554	THROTTLE POSITION SENSOR RE-
		TURN
23-26		NOT USED
27	567A	SERVICE BRAKE SWITCH INPUT
28-30		NOT USED

Vehicle ECU Connector C-(GREEN)

Cavity Circuit Description

1401-D DATA LINK J1708 (-)

2400-D DATA LINK J1708 (+)

3408-B DATA LINK J1939 SHIELD

4406-B DATA LINK J1939 CAN HI

5407-B DATA LINK J1939 CAN LOW

W3002689

W3002690

27

Group 28

Specifications

Schematic

D12B

W2002827

28