VENDOR

APPLICATION GUIDE
(V-MAC IV)
®

2007 EMISSIONS STD.

OCTOBER 2008
(REVISED)
8-372
 VENDOR APPLICATION GUIDE
(V-MAC IV) 2007
EMISSIONS STD.




OCTOBER 2008 © MACK TRUCKS, INC. 2008

(REVISED — SUPERSEDES ISSUE DATED JULY 2007) 8-372
 ATTENTION
The information in this manual is not all inclusive and cannot take into
account all unique situations. Note that some illustrations are typical and
may not reflect the exact arrangement of every component installed on a
specific chassis.

The information, specifications, and illustrations in this publication are

based on information that was current at the time of publication.

No part of this publication may be reproduced, stored in a retrieval

system, or be transmitted in any form by any means including (but not
limited to) electronic, mechanical, photocopying, recording, or otherwise
without prior written permission of Mack Trucks, Inc.

Page ii
TABLE OF CONTENTS

TABLE OF CONTENTS

Page iii
 TABLE OF CONTENTS
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
SAFETY INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Advisory Labels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Service Procedures and Tool Usage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
INTRODUCTION AND PURPOSE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
VENDOR APPLICATION GUIDE V-MAC IV 07 EMISSIONS STD. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
SYSTEM OVERVIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
V-MAC IV Electronic Control Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Fuel System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
MODULE ENVIRONMENTAL AND ELECTRICAL REQUIREMENTS . . . . . . . . . . . . . . . . . . . . . . . 6
Engine Management System (EMS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Vehicle Electronic Control Unit (VECU) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Instrument Cluster Module (ICM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Gauge Driver Module (GDM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Power and Ground Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
System Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
ENGINE MANAGEMENT SYSTEM SENSORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Aftertreatment Fuel Injector Pressure Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Air-Humidity Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Boost Pressure-Temperature Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Camshaft Position (Engine Position) Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Crank Speed (Engine Speed) Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Coolant Level Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Coolant Temperature Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Crankcase Pressure Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Diesel Particulate Filter (DPF) Differential Pressure Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
DPF Temperature Sensors (Pre CAT, Post CAT, Post DPF) . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Exhaust Gas Recirculation (EGR) Differential Pressure Sensor . . . . . . . . . . . . . . . . . . . . . . . . 37
EGR Temperature Aftercooler Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Fuel Pressure Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
NOx Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Oil Pressure Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Oil Level-Temperature Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Turbocharger Speed Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Water in Fuel Filter Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
VEHICLE ELECTRONIC CONTROL SENSORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Throttle (Accelerator) Position Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Vehicle Speed (Road Speed) Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
INSTRUMENT CLUSTER MODULE SENSORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Air Brake Application Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Air Suspension Pressure Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Ambient Air Temperature Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Front Drive Axle Temperature Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Fuel Level Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Interior Cab Temperature Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Rear Drive Axle Temperature Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Primary and Secondary Air Pressure Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Transmission Oil Temperature Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Automatic Transmissions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Automated Transmissions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Manual Transmissions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Page iv
 TABLE OF CONTENTS
SENSOR REQUIREMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
GAUGE DRIVER MODULE SENSORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Air Suspension Pressure Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Ambient Air Temperature Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Exhaust Temperature (Pyrometer) Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Fuel Level Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Primary and Secondary Air Pressure Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
SYSTEM INPUT SWITCHES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
General Switch Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
A/C Pressure Switch (Optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Clutch Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Daytime Running Lights (DRL) Override Switch (Optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
DPF Smart Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Engine Brake Low and High Switch (Optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Fan Clutch Override Switch (Optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Idle Shutdown Override Switch (Optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Key Switch (Required) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Power Take-Off (PTO) 1 and PTO 2 Switches (Optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Service Brake and Parking Brake Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Set/Resume Switch (Optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Spare 1 or PTO 3 (VECU pin VB-21) and Spare 2 or PTO 4 (VECU pin VA-17) Inputs
(Optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Speed Control ON/OFF Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
SYSTEM OUTPUTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Buffered MPH Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Buffered RPM Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Engine Brake Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Exhaust Gas Recirculation (EGR) Valve Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Fan Clutch Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Power Relay Driver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Unit Injector Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
DIAGNOSTICS AND FAULT CODES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
DATA LINKS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
SAE J1939 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
SAE J1708/J1587 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
SYSTEM FUNCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
DataMax™ Control Language (for Future Support) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
Engine Brake Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
Engine Low Idle Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
Engine Protection Warning and Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
Idle Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
Idle Cooldown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
Limp Home Capability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
Min-Max or All Speed Governor Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
ON/OFF Fan Control and Electronic Viscous . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
SYSTEM CONNECTOR PIN DESIGNATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
Engine Management System (EMS) Connector Pin Designations . . . . . . . . . . . . . . . . . . . . . 105
Vehicle Electronic Control Unit (VECU) Connector Pin Designations . . . . . . . . . . . . . . . . . . . 107
Instrument Cluster Module (ICM) Connector Pin Designations . . . . . . . . . . . . . . . . . . . . . . . . 110
Gauge Driver Module (GDM) Connector Pin Designations . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
Serial Communication Port Pin Designations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112

Page v
 TABLE OF CONTENTS
DESCRIPTION AND OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
V-MAC IV Major Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
V-MAC IV Sensor Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
INDEX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123

Page vi
INTRODUCTION

INTRODUCTION

Page 1
 INTRODUCTION
SAFETY INFORMATION

Advisory Labels
Cautionary signal words (Danger-Warning-Caution) may appear in various locations throughout this
manual. Information accented by one of these signal words must be observed to minimize the risk of
personal injury to service personnel, or the possibility of improper service methods which may damage
the vehicle or cause it to be unsafe. Additional Notes and Service Hints are used to emphasize areas of
procedural importance and provide suggestions for ease of repair. The following definitions indicate the
use of these advisory labels as they appear throughout the manual:

Danger indicates an unsafe practice that could result in death or serious

personal injury. Serious personal injury is considered to be permanent injury
from which full recovery is NOT expected, resulting in a change in life style.

Warning indicates an unsafe practice that could result in personal injury.

Personal injury means that the injury is of a temporary nature and that full
recovery is expected.

Caution indicates an unsafe practice that could result in damage to the product.

Note indicates a procedure, practice, or condition that must be followed in order for
the vehicle or component to function in the manner intended.

A helpful suggestion that will make it quicker and/or easier to perform a procedure,
while possibly reducing service cost.

Page 2
 INTRODUCTION
Service Procedures and Tool Usage
Anyone using a service procedure or tool not recommended in this manual must first satisfy himself
thoroughly that neither his safety nor vehicle safety will be jeopardized by the service method he selects.
Individuals deviating in any manner from the instructions provided assume all risks of consequential
personal injury or damage to equipment involved.

Also note that particular service procedures may require the use of a special tool(s) designed for a
specific purpose. These special tools must be used in the manner described, whenever specified in the
instructions.

1. Before starting a vehicle, always be seated in the driver's seat, place the
transmission in neutral, apply the parking brakes, and push in the clutch
pedal. Failure to follow these instructions could produce unexpected
vehicle movement, which can result in serious personal injury or death.
2. Before working on a vehicle, place the transmission in neutral, set the
parking brakes, and block the wheels. Failure to follow these instructions
could produce unexpected vehicle movement, which can result in serious
personal injury or death.

Engine-driven components such as Power Take-Off (PTO) units, fans and fan
belts, driveshafts and other related rotating assemblies, can be very
dangerous. Do not work on or service engine-driven components unless the
engine is shut down. Always keep body parts and loose clothing out of range
of these powerful components to prevent serious personal injury. Be aware of
PTO engagement or nonengagement status. Always disengage the PTO when
not in use.

Do not work under a vehicle that is supported only by a hydraulic jack. The
hydraulic jack could fail suddenly and unexpectedly, resulting in severe
personal injury or death. Always use jackstands of adequate capacity to
support the weight of the vehicle.

Before towing the vehicle, place the transmission in neutral and lift the rear wheels
off the ground, or disconnect the driveline to avoid damage to the transmission
during towing.

REMEMBER,
SAFETY . . . IS NO ACCIDENT!

Page 3
 INTRODUCTION
INTRODUCTION AND
PURPOSE
Electronic engine controls can be used to
improve engine performance while reducing
emissions and fuel consumption. Mack Trucks,
Inc. has developed a new Vehicle Management
and Control System (V-MAC® IV), which is
standard on all MP7 and MP8 engines.

The purpose of this manual is to provide a guide

for interfacing with V-MAC IV electronics. This
manual is intended for Original Equipment
Manufacturers (OEMs) and aftermarket body
builders. Although every effort has been made to
ensure that all information is as accurate as
possible, some information may change without
notice.

Please note that this manual contains information

for MP7 and MP8 engines that meets U.S. 2007
Emission Standards. For MP7 engines that meet
U.S. 2004 Emissions Standards please refer to
the Vendor Application Guide (V-MAC® IV) 2004
Emission Standards, 8-359.

Page 4
 VENDOR APPLICATION GUIDE V-MAC IV 07 EMISSIONS STD.

VENDOR APPLICATION GUIDE V-MAC IV 07

EMISSIONS STD.

Page 5
 VENDOR APPLICATION GUIDE V-MAC IV 07 EMISSIONS STD.

SYSTEM OVERVIEW MODULE ENVIRONMENTAL

AND ELECTRICAL
V-MAC IV Electronic Control Units REQUIREMENTS
The V-MAC IV system consists of four major
electronic control units:
The V-MAC IV electronic control units (VECU,
Engine Management System (EMS) — Handles EMS, ICM, and GDM) should not be mounted in
fuel control, fan control, timing and engine sensor an area that will be used for storage because this
information. could reduce the heat dissipation from the units.

Vehicle Electronic Control Unit (VECU) —

Handles engine brake control, speed control, Each control unit should be mounted in an area
theft deterrence, idle shutdowns, and data that allows the following environmental
logging. requirements to be met during normal operation.

Instrument Cluster Module (ICM) — (not Engine Management System (EMS)

available for LEU and MRU model trucks) The
V-MAC IV Instrument Cluster (ICM) is a 앫 Operating Temperature: −40°C (−40°F) to
one-piece unit composed of gauges and an + 90°C (194°F)
information display. Information is displayed when
required or requested via a stalk switch. 앫 Humidity: 0% to 100% RH
앫 Mechanical Vibration: 1 to 300 Hz <5g; 300
Some of the information displayed by the ICM to 1000 Hz <10g; 1000 to 1800 Hz <25g
includes air brake application, air suspension,
axle oil temperature, exhaust temperature,
interior and outside temperature, primary and
secondary air pressure, transmission oil The only acceptable EMS mounting systems are
temperature, and vehicle speed. those already supplied by Mack Trucks, Inc. Any
substitute mounting arrangements for the EMS,
Gauge Driver Module (GDM) — The V-MAC IV other than the arrangement supplied from the
Gauge Driver Module (GDM) is a black box factory, must be approved by Mack Trucks, Inc.
controller used in LEU and MRU model chassis.
The GDM contains a warning light bar, an hour
meter located in the tachometer and an odometer
located in the speedometer. A separate push Vehicle Electronic Control Unit
button is available to toggle through different (VECU)
functions such as to retrieve fault codes and view
trip information. 앫 Operating Temperature: −40°C (−40°F) to
+70°C (158°F)
The EMS, VECU and ICM provide diagnostic fault
앫 Humidity: 5% to 95% RH
logging (accessible via a service tool), customer
programming and programming audit trails that 앫 Mechanical Vibration: 1 to 1000 Hz <5g
detail when and where programming took place.
Instrument Cluster Module (ICM)
Fuel System
앫 Operating Temperature: −40°C to +85°C
(−40°F to +185°F)
The V-MAC IV fuel system consists of six
individually controlled fuel injectors called 앫 Humidity: 45% to 75% RH
Integrated Unit Injectors (IUI). Each IUI performs
앫 Rated Voltage: 12 volts
timing and fuel control functions that optimize
engine performance for emissions, noise, fuel
consumption and driveability.

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Gauge Driver Module (GDM) System Connectors

Information not available at time of publication. The V-MAC IV system uses several connector
types. Most of the V-MAC IV system testing is
done in the largest connectors (EMS, VECU,
Power and Ground Connections ICM, GDM and Serial Communication Port).

To allow the battery to act as a filter, an

electrically solid connection to the battery (both ENGINE MANAGEMENT SYSTEM (EMS)
Vbatt+ and Vbatt−) is recommended. CONNECTORS

앫 Battery Feed: Direct to Vbatt+ or electronics The MACK® MP7/MP8 EMS contains two 62-pin
power bus connectors (see Figure 1). To disconnect a
connector from the EMS, flip up the connector
lock handles and gently pull the connector on its
heel and away from the EMS. The following
illustrations show each pin number as it appears
Sourcing to the starter motor stud is not on the back of the EMS connectors. When
recommended. checking the pin numbers, align the connector as
shown in the illustration to avoid confusion. The
앫 Battery Ground: Direct to Vbatt ground post connector number and EMS orientation are
or to an isolated electronics single point shown as a reference for reconnecting the EMS
ground to the engine harness.
앫 Circuit Current Capacity: 25 amps
앫 Minimum Starting Voltage Required:
9.0 volts
앫 Minimum Running Voltage Required:
9.5 volts on 12-volt systems
앫 Maximum Voltage that can be applied to the
module: 24 volts (up to three minutes) for
12-volt systems

Under normal operating conditions, the ECUs will

function properly when supply voltage is within
9.0 and 16.0 volts for 12-volt systems.

The V-MAC IV electronic system is protected

against jump-start conditions for up to three
minutes. The VECU is protected against short
circuits to battery on all pins. The EMS is
protected against short circuits to battery on all
pins except the ground pins. A short circuit on the
ground will open the fuse.

The VECU is internally protected from reverse

voltage.

The EMS is not internally protected from reverse

voltage; therefore, the EMS should receive Vbatt+
directly from the power relay circuit.

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Figure 1 — EMS Connectors (for MACK® MP7/MP8)

NOTES ON MACK® MP7/MP8 EMS CONNECTORS

Connector Description
A Used for: Sensor signals, electronic unit injection, low-side drives and engine drives, J1708, J1587
high and low and several switch inputs. Contains: 62 pins
B Used for: Power, ground, J1939, sensor signals and switch inputs, and output drives other than
pump drives. Contains: 62 pins

EMS CONNECTOR PART NUMBERS (FOR MACK® MP7/MP8)

Description Mack Part No.

A: Connector 20429842
A: Terminal (0.5–1.0) 983014
A: Terminal (1.5–2.5) 383020
A: Cable Seal (1.9–2.1) 983016
A: Cable Seal (2.2–3.0) 970773
A: Cable Seal (0–0) 970771
A: Cable Seal (3.6) 983017

B: Connector 20429843
B: Terminal (0.5–1.0) 983014
B: Terminal (1.5–2.5) 383020
B: Cable Seal (1.9–2.1) 983016
B: Cable Seal (2.2–3.0) 970773
B: Cable Seal (0–0) 970771
B: Cable Seal (3.6) 983017

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Figure 2 — EMS Pinouts

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The following pin assignments are used on the EMS:

3

Figure 3 — Engine Management System Pin Assignments (Pinout 1 of 2)

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Figure 4 — Engine Management System Pin Assignments (Pinout 2 of 2)

For a complete listing of EMS connector pin

designations, refer to “Engine Management
System (EMS) Connector Pin Designations” on
page 105.

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VEHICLE ELECTRONIC CONTROL UNIT

(VECU) CONNECTORS
The Vehicle ECU has three connectors: A, B and The Vehicle ECU connector is not sealed against
C. Connectors A and B contain 30-pin moisture; ALWAYS mount in the downward
assignments, while Connector C contains five-pin position.
assignments. Each pin is marked on the outside
of the connector. To disconnect a connector from
the VECU, press down on the tang of the harness
connector and gently pull the connector from the
VECU. Make sure the connector is aligned as
shown in the illustration to avoid confusion when
checking pin numbers. The connector number
and color are shown as a reference for
reconnecting the VECU to the cab harness.
5

Figure 5 — VECU Connectors

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VECU CONNECTOR PART NUMBERS

Connector Mack Part No.

A — Green 957AM23
B — Blue 957AM24
C — Green 957AM21
Pins 925AM266 (22–18 AWG)

Figure 6 — VECU Pinouts

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The following pin assignments are used on the vehicle ECU:

7

Figure 7 — Vehicle ECU Pin Assignments for CHU, CXU and GU Models (Pinout 1 of 3)

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Figure 8 — Vehicle ECU Pin Assignments for CHU, CXU and GU Models (Pinout 2 of 3)

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Figure 9 — Vehicle ECU Pin Assignments for CHU, CXU and GU Models (Pinout 3 of 3)

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The following pin assignments are used on the vehicle ECU:

10

Figure 10 — Vehicle ECU Pin Assignments for LEU Models (Pinout 1 of 3)

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11

Figure 11 — Vehicle ECU Pin Assignments for LEU Models (Pinout 2 of 3)

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12

Figure 12 — Vehicle ECU Pin Assignments for LEU Models (Pinout 3 of 3)

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The following pin assignments are used on the vehicle ECU:

13

Figure 13 — Vehicle ECU Pin Assignments for MRU Models (Pinout 1 of 3)

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14

Figure 14 — Vehicle ECU Pin Assignments for MRU Models (Pinout 2 of 3)

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15

Figure 15 — Vehicle ECU Pin Assignments for MRU Models (Pinout 3 of 3)

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16

Figure 16 — Legend for VECU Pin Assignments

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For a complete listing of VECU connector pin To disconnect a connector from the ICM, press
designations, refer to “Vehicle Electronic Control down on the tang of the harness connector and
Unit (VECU) Connector Pin Designations” on gently pull the connector from the ICM. Make
page 107. sure the connector is aligned as shown in the
illustration to avoid confusion when checking pin
numbers. The connector number and color are
INSTRUMENT CLUSTER MODULE (ICM)
shown as a reference for reconnecting the ICM to
CONNECTORS
the cab harness.
The ICM has three connectors: A, B and C. 17

Connectors A and B contain 30-pin assignments,

while Connector C contains 22-pin assignments.

Figure 17 — ICM Connectors

ICM CONNECTOR PART NUMBERS

Connector Mack Part No.

A — Blue 957AM24
B — Green 957AM23
C — Green 957AM22
Pins 925AM266 (22–18 AWG)

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18

Figure 18 — ICM Pinouts

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The following pin assignments are used for the Instrument Cluster Module:
19

Figure 19 — Instrument Cluster Module Pin Assignments for CHU, CXU and GU Models (Pinout 1 of 3)

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20

Figure 20 — Instrument Cluster Module Pin Assignments for CHU, CXU and GU Models (Pinout 2 of 3)

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21

Figure 21 — Instrument Cluster Module Pin Assignments for CHU, CXU and GU Models (Pinout 3 of 3)

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22

Figure 22 — Legend for ICM Pin Assignments

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For a complete listing of the ICM connector pin GDM, press down on the tang of the harness
designations, refer to “SYSTEM CONNECTOR connector and gently pull the connector from the
PIN DESIGNATIONS” on page 105. GDM. Make sure the connector is aligned as
shown in the illustration to avoid confusion when
checking pin numbers. The connector number
GAUGE DRIVER MODULE (GDM)
and color are shown as a reference for
The GDM has two connectors: A and B. reconnecting the GDM to the cab harness.
Connectors A and B both contain 30-pin 23

assignments. To disconnect a connector from the

Figure 23 — GDM Connectors

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24

Figure 24 — GDM Pinouts

GDM CONNECTOR PART NUMBERS

Connector Volvo/Mack Part No.

A — White 20409351
B — Orange 20409352
Pins 925AM266 (22–18 AWG)

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The following pin assignments are used for the Gauge Driver Module.
25

Figure 25 — Gauge Driver Module Pin Assignments for LEU and MRU Models (Pinout 1 of 2)

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26

Figure 26 — Gauge Driver Module Pin Assignments (Pinout 2 of 2)

SERIAL COMMUNICATION PORT

27

The Serial Communication Port is a nine-pin

connector used for system diagnostics and
reprogramming. It is located under the dashboard
to the left of the steering column. This port is
used for connecting the diagnostic computer.

For a listing of the signal on each pin designation,

refer to “Instrument Cluster Module (ICM)
Connector Pin Designations” on page 110.

Figure 27 — Serial Communication Port (9 Pin)

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ENGINE MANAGEMENT 앫 Measurement function: Measures the

relative humidity in % RH and delivers an
SYSTEM SENSORS analog signal in proportion to humidity
앫 Fault Detection: Short to ground, loss of
Aftertreatment Fuel Injector ground, short circuit to +5V, short circuit to
Pressure Sensor battery voltage
앫 Mack P/N: 64MT490M
The aftertreatment fuel injector pressure
앫 Volvo P/N: 21046544
sensor — sometimes referred to as the DPF fuel
pressure sensor — is supplied with fuel during a
diesel particulate filter regeneration event. The Boost Pressure-Temperature
aftertreatment fuel injector fuel pressure is
measured by a pressure sensor mounted in the Sensors
aftertreatment fuel system solenoid valve.
There are two “boost” sensors and they use the
앫 Sensor Type: Pressure Transducer same part number: boost pressure and boost
앫 Operating Temperature: –40°C to 125°C temperature. The boost pressure sensor is
(–40°F to 257°F) located on the EGR mixing plenum and
measures the boost pressure of the EGR mixer.
앫 Nominal Operating Voltage: 5.0V The boost temperature sensor is located at the
앫 Operating Voltage Range (V5): rear of the inlet manifold and measures the
5.00 ± 0.25 VDC temperature of the inlet manifold. The sensors
use a pressure-sensitive diaphragm movement.
앫 Fault Detection: to +5V Information from these sensors is transmitted on
앫 Mack P/N: 20898038 the J1587 communications line using PID 439.

Air-Humidity Sensor
Information from this sensor is needed for fuel
The air-humidity sensor — located in the inlet air and EGR control.
duct work between the air filter and turbocharger
inlet — is a combination-type sensor that 앫 Sensor Type: Piez-Resistive
monitors humidity and temperature. The Pressure/Temperature
information from this sensor is used to determine
the oxygen and water content in the inlet air. 앫 Design: Housing of the sensor holds
앫 Sensing elements and electronic
The humidity portion of the sensor is a three-wire device for piez-resistive pressure
device (5 volt, ground and signal). The output measurement
voltage is proportional to the relative humidity.
The air temperature portion of the sensor is a 앫 Sensing element for temperature
thermistor that has varying resistance according measurement
to temperature. The sensor has a negative 앫 Socket for mechanical connection
temperature coefficient (meaning the sensor
resistance decreases as the temperature 앫 Electrical connector
increases). 앫 Operating temperature: −40°C to +130°C
앫 Sensor Type: Combination (−40°F to 266°F)
앫 Design: Housing holding the sensor 앫 Measurement function: Measures to the
element; integral connector, electrically boost pressure inside the inlet air manifold
connecting the sensor elements with the and the boost temperature inside the inlet
measuring device manifold
앫 Fault Detection: Short to ground, open
앫 Operating temperature: −40°C to +85°C
(−40°F to 185°F) 앫 Mack P/N: 64MT480M
앫 Volvo P/N: 20524936

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Camshaft Position (Engine Position) Crank Speed (Engine Speed)

Sensor Sensor
The camshaft position sensor, located in the Engine speed information is used to determine
outside face of the timing gear cover, uses the optimal timing and maximum fuel delivery. The
principle of magnetic induction to produce an crank speed sensor, located on top of the
electric pulse. It senses the passage of any of the flywheel housing, provides crankshaft position
seven timing notches machined on the edge of information that is compared with engine position
the camshaft dampener. Six of the notches sensor information to calculate the current
represent top dead center (TDC) marks for the six injection timing.
cylinders. The seventh mark is used for timing
reference to determine the position of cylinder The crank speed sensor also uses magnetic
No. 1. induction and functions in the same manner as
the camshaft position sensor (previously
described). The sensor generates an electric
pulse whenever one of the notches on the
The information provided by the camshaft flywheel ring gear passes close to the tip of the
position sensor was designed for use by the EMS sensor. There are three sets of 18 notches on the
only. If an accurate camshaft position/engine edge of the flywheel that pass close enough to
position signal is needed, tap into the tachometer the sensor tip to provide an electric pulse.
drive from the camshaft position/engine position Because each pulse occurs in a fixed
signal line. As an alternative, access engine and relationship, the pulses generated during each
vehicle speed information off of the J1587 line. revolution of the engine crankshaft provide a
reference of top dead center (TDC) for each
piston.
앫 Sensor Type: Magnetic Induction
앫 Design: Housing of the sensor holds
앫 Sensing device for speed
measurement, which principle is The information provided by the crank speed
variable reluctance sensor was designed for use by the EMS only. If
an accurate engine speed signal is needed, tap
앫 Socket for mechanical connection into the tachometer drive from the ICM at the
앫 Electrical connector buffered RPM junction black stud on the electrical
equipment panel. As an alternative, access
앫 Operating temperature: −40°C to +130°C engine and vehicle speed information off of the
(−40°F to 266°F) J1587 line.
앫 Output requirements: Winding resistance
shall not exceed 1.5 ohms 앫 Sensor Type: Variable Reluctance
앫 Cam wheel — speed at 25 rpm; output 앫 Design: Housing of the sensor holds:
at Vout>0.15 Vp
앫 Sensing device for speed
앫 Fault Detection: Inactive (no signal)/missing measurement, which principle is
variable reluctance
앫 Mack P/N: 20513343
앫 Socket for mechanical connection
앫 Electrical connector
앫 Operating temperature: −40°C to +130°C
(−40°F to 266°F)
앫 Output requirements: Winding resistance
shall not exceed 1.5 ohms
앫 Fault Detection: Inactive (no signal)
앫 Mack P/N: 20513343

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Coolant Level Sensor 앫 Sensor Type: Resistive

앫 Design: Housing of the sensor holds:
The coolant level sensor, mounted in the remote 앫 Sensing element for temperature
reservoir, consists of a pair of flexible switch measurement, which principle is an
reeds made of a magnetic material, and sealed in NTC-resistor
a glass tube filled with inert gas. The reeds are
overlapped but separated by a small gap. The 앫 Socket for mechanical connection
contact area of each reed is plated with a special 앫 Electrical connector
metal to provide the switch with stability. A 앫 Operating Temperature: −40°C to +140°C
magnetic field, from a floating magnet, is used to (−40°F to 284°F)
cause both reed switches to be magnetized to
produce an N-pole at the contact area of one 앫 Fault Detection: Open, supply voltage, short
reed, and an S-pole at that of the other reed. If to ground or Vbatt
the magnetic attracting force overcomes the 앫 Mack P/N: 20513340
resistive force caused by elasticity of the reed, the
reeds come in contact (Pull-In), i.e., the circuit is
closed. Once the magnetic field is removed, the Crankcase Pressure Sensor
reeds are separated again by the effect of
elasticity of the reed (Drop-Out), i.e., the circuit is The crankcase pressure sensor, usually located
opened. If the latter, the sensor will signal that the on the valve cover on the left-hand side, monitors
coolant level is low. the crankcase pressure. This sensor uses a
pressure-sensitive diaphragm and an electrical
앫 Sensor Type: Float Switch amplifier to calculate gauge pressure. When the
앫 Fault Detection: Open, short to ground or crankcase pressure changes, the diaphragm
Vbatt moves and the amplifier produces an electrical
signal proportional to the diaphragm movement.
앫 Mack P/N: 64MT482AM (for LEU and MRU
model trucks) 앫 Sensor Type: Pressure Transducer
앫 Mack/Volvo P/N: 20900982 앫 Design: Sensor consists of:
앫 Housing containing the pressure
Coolant Temperature Sensor sender
앫 Pipe containing the temperature
The coolant temperature sensor, usually located element (NTC)
in the right front bottom corner of the cylinder 앫 Electrical connection
head, is a thermistor that has varying resistance
according to temperature. The sensor has a 앫 Mechanical thread connection
negative temperature coefficient (this means the 앫 Operating Temperature: −40°C to +140°C
sensor resistance decreases as the temperature (−40°F to 284°F)
increases). Information from this sensor is used
to evaluate operating conditions that cause high 앫 Output Signal: Nominal output voltage @
coolant temperatures, such as radiator blockage, +25°C (77°F) and Vs = 5.000 ± 0.002 VDC:
thermostat failure, heavy load, high ambient air 앫 0.5000 VDC @ min pressure to
temperatures, etc. Information from this sensor is 4.500 VDC @ max pressure
also used by the EMS for cold start
enhancement. The EMS applies more fuel 앫 Accuracy Range:
whenever the coolant temperature is below a 앫 ± 3% of full pressure (0°C to +110°C
specified threshold. When an ON/OFF fan or [32°F to 230°F])
electronic viscous fan clutch is installed,
information from the coolant temperature sensor 앫 ± 5% of full pressure (−40°C to 0°C and
is used to control operation of the fan clutch. +110°C to +150°C [−40°F to 32°F and
230°F to 302°F])
앫 Fault Detection: Open, short to ground or
Vbatt
앫 Mack P/N: 20796744

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Diesel Particulate Filter (DPF) Exhaust Gas Recirculation (EGR)

Differential Pressure Sensor Differential Pressure Sensor
The DPF Differential Pressure sensor — located The EGR Differential Pressure sensor is a
on the DPF inlet house outboard facing — ceramic, capacitive type pressure transducer.
monitors pressure across the filter canister. When The sensor measures changes in EGR flow and
the different pressure across the filter canister is communicates to the VGT actuator and EGR
raised to a sufficient level, the filter heating valve through a closed-loop electronic system.
elements will be turned on, one at a time, to burn The sensor outputs a voltage to the EMS in direct
off particulates and to reduce the pressure drop. proportion to the pressure drop across the orifice
in the EGR pipe. In this way the EMS can make
앫 Sensor Type: Pressure Transducer
an accurate assessment of the gas flow through
앫 Operating Temperature: –40°C to 125°C the tube. The sensor is located in the EGR mixing
(–40°F to 257°F) plenum.
앫 Nominal Operating Voltage: 5.0V 앫 Sensor Type: Pressure Transducer
앫 Operating Voltage Range (V5): 앫 Design: Sensor consists of —
5.00 ± 0.25 VDC
앫 Housing
앫 Fault Detection: Short circuit to ground, loss
앫 Gasket (Sealing)
of ground, short circuit to +5V
앫 Mounting Bracket
앫 Mack P/N: 20451992
앫 Operating Temperature: –40°C to 125°C
(–40°F to 257°F)
DPF Temperature Sensors (Pre CAT,
앫 Operating Supply Voltage (V5):
Post CAT, Post DPF) 5.00 ± 0.25 VDC

The exhaust temperature is measured by three 앫 Fault Detection: Open, short to ground or
sensors, mounted in different areas of the DPF. signal line
The DPF temperature sensor at the DPF inlet 앫 Mack P/N: 20930137
measures the temperature of the exhaust as it
enters the DPF. The DPF temperature sensor
after the catalyst measures the temperature of
the exhaust as it leaves the catalyst section of the
DPF. The DPF temperature sensor at the DPF
outlet measures the temperature of the exhaust
as it leaves the DPF.
앫 Sensor Type: Thermistor
앫 Operating Temperature: –40°C to 850°C
(–40°F to 1562°F)
앫 Nominal Operating Voltage: 5.0V
앫 Operating Voltage Range (V5):
5.00 ± 0.25 VDC
앫 Fault Detection: Short circuit to ground, loss
of ground, short circuit to +5V
앫 Mack P/N: 20451990

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EGR Temperature Aftercooler 앫 Accuracy Range:

Sensor 앫 ± 3% of full pressure (0°C to +110°C
[32°F to 230°F])
The EGR Temperature Aftercooler sensor — 앫 ± 5% of full pressure (−40°C to 0°C and
located in the EGR mixing plenum — is a +110°C to +150°C [−40°F to 32°F and
thermistor that has varying resistance according 230°F to 302°F])
to temperature. Information from this sensor is
used to evaluate operating conditions that cause 앫 Fault Detection: Open, short to ground or
high exhaust gas temperatures measures the Vbatt
exhaust gas temperature. When the EGR 앫 Mack P/N: 20898038
temperature becomes too high, a fault is logged,
indicating the EGR cooler has failed or has
become plugged. NOx Sensor
앫 Sensor Type: Thermistor
The NOx sensor, located in the diesel particulate
앫 Storage Temperature: –40°C to 100°C filter outlet housing, is a multifunctional exhaust
(–40°F to 212°F) gas sensor that measures nitrogen oxide
앫 Operating Supply Voltage (V5): concentration values in the exhaust pipe.
5.00 ± 0.25 VDC 앫 Sensor Type: Thermistor
앫 Fault Detection: Open, short to ground or 앫 Design: Sensor consists of:
measuring line
앫 Housing containing the sensing
앫 Mack P/N: 21010707 element
앫 NOx Electronic Control Unit (ECU)
Fuel Pressure Sensor interfacing the sensor and EMS
앫 Wire electrically connecting the sensing
The fuel pressure sensor, located near the top of element with the NOx ECU
the fuel filter on the left-hand side, monitors the
fuel pressure. This sensor uses a 앫 Operating Temperature:
pressure-sensitive diaphragm and an electrical 앫 Ambient: −40°C to 105°C (−40°F to
amplifier to calculate gauge pressure. When the 221°F)
fuel pressure changes, the diaphragm moves and
the amplifier produces an electrical signal 앫 Exhaust: Less than or equal to 800°C
proportional to the diaphragm movement. (1472°F)

앫 Sensor Type: Piezo-Resistive 앫 Voltage:

앫 Design: Sensor consists of: 앫 Nominal Operating Voltage: 14.2 V

앫 Housing containing the pressure 앫 Operating Voltage Range: 11.5 to 16 V

sender 앫 Fault Detection: Open, short to ground or
앫 Pipe containing the temperature Vbatt.
element (NTC) 앫 Mack P/N: 21069361
앫 Electrical connection
앫 Mechanical thread connection
앫 Operating Temperature: −40°C to +140°C
(−40°F to 284°F)
앫 Output Signal: Nominal output voltage @
+25°C (77°F) and Vs = 5.000 ± 0.002 VDC:
앫 0.5000 VDC @ min pressure to
4.500 VDC @ max pressure

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Oil Pressure Sensor Oil Level-Temperature Sensor

The oil pressure sensor, located near the top of The oil level-temperature sensor, mounted inside
the oil filter on the right-hand side, monitors the at the bottom of the oil sump, monitors the oil
oil pressure. This sensor uses a level and temperature. When the oil level or
pressure-sensitive diaphragm and an electrical temperature changes, a diaphragm in the sensor
amplifier to calculate gauge pressure. When the moves and the amplifier produces an electrical
oil pressure changes, the diaphragm moves and signal proportional to the diaphragm movement.
the amplifier produces an electrical signal
앫 Sensor Type: Resistive
proportional to the diaphragm movement.
앫 Design: Sensor consists of:
앫 Sensor Type: Piezo-Resistive
앫 Housing containing an electrothermal
앫 Design: Sensor consists of:
element
앫 Housing containing the pressure
앫 Socket with three holes
sender
앫 Cable
앫 Pipe containing the temperature
element (NTC) 앫 Electrical connection with included
sump wall entrance
앫 Electrical connection
앫 Operating Temperature: −40°C to +140°C
앫 Mechanical thread connection
(−40°F to 284°F) continuous and +150°C
앫 Operating Temperature: −40°C to +140°C (302°F) for 1 hour
(−40°F to 284°F)
앫 Voltage and current ratings:
앫 Output signal: Nominal output voltage @
앫 Nominal Operating Current: 247 mA
+25°C (77°F) and Vs = 5.000 ± 0.002 VDC:
앫 Operating Current Range: 250 mA
앫 0.5000 VDC @ min pressure to
± 20 mA
4.500 VDC @ max pressure
앫 Rated Voltage: 5 to 30 VDC
앫 Accuracy Range:
앫 Fault Detection: Open, short to ground or
앫 ± 3% of full pressure (0°C to +110°C
Vbatt
[32°F to 230°F])
앫 Mack P/N: 24424110
앫 ± 5% of full pressure (−40°C to 0°C and
+110°C to +150°C [−40°F to 32°F and
230°F to 302°F])
앫 Fault Detection: Open, short to ground or
Vbatt
앫 Mack P/N: 20886108

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Turbocharger Speed Sensor Water in Fuel Filter Sensor

The turbocharger speed sensor — mounted in The water in fuel filter (WIFF) sensor — located in
the turbocharger housing — is a variable the transparent plastic bowl under the fuel filter —
reluctance sensor. Using the principle of is a water sensing probe. If water is detected, the
magnetic induction, the sensor generates an WIFF sensor will notify the driver to drain the
electric pulse each time the single tooth on the collection bowl. Reset is automatic and requires
turbocharger shaft passes close to the sensor tip. no service tool.
앫 Sensor Type: Actuator
Turbocharger speed is constantly monitored, and
if the speed exceeds certain limits based on 앫 Design: One-piece design with two wires
altitude, engine power will be reduced in order to
앫 Voltage: 12 volts
protect the turbocharger. If the sensor fails,
resulting in speeds above or below the normal, a 앫 Fault Detection: Short to ground or Vbatt
default value will be selected to reduce engine
앫 Mack P/N: 20771580
power.
앫 Sensor Type: Variable Reluctance
앫 Fault Detection: Valid but Low, Missing
Signal
앫 Mack P/N: 24427413

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VEHICLE ELECTRONIC The throttle position sensor is a three-wire,

ratio-metric type sensor that conforms to SAE
CONTROL SENSORS J1843 requirements. The sensor is supplied by a
5-volt reference voltage.
Throttle (Accelerator) Position 앫 Sensor Type: Resistive
Sensor 앫 Supplier: Williams, model WM-540 or
equivalent
The throttle position sensor, located above the
앫 Fault Detection: Open, short to ground
accelerator pedal, provides the V-MAC IV system
(below 0.4 volt) or Vbatt (above 4.9 volts)
with driver fuel requirement input. This sensor is a
potentiometer (variable resistor) linked to the 앫 Maximum Reference Current: 10 mA
accelerator pedal and replaces the mechanical
앫 Mack P/N: 4QB414M
linkage for fuel control. As the pedal is pressed,
the sensor resistance will change and the signal
voltage of the sensor will indicate the accelerator AUXILIARY ACCELERATOR PEDAL SIGNAL
pedal position.
Mack Trucks, Inc., has designed an extensive
speed control system that allows for external
speed control through an auxiliary accelerator
pedal signal. The pedal is wired in parallel using a
The Idle Validation switch is also integrated in the multi-pin selector switch. If the signal is not
throttle position sensor assembly. switched between the two accelerator pedals, a
fault code may be generated due to high current
at the throttle pedal signal input line (VECU B-8).

An identical pedal is needed for the auxiliary

sensor accelerator pedal because it requires an
IVS signal. A substitute type pedal may cause a
fault code and is not recommended.

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28

Figure 28 — Auxiliary Accelerator Pedal Signal

Vehicle Speed (Road Speed) Sensor 앫 Sensor Type: Variable reluctance

앫 Minimum Voltage Sensed: 0.225 volt peak
The vehicle speed sensor is located at the ± 0.025 volt
transmission output shaft. Vehicle speed
information is used for cruise control and road 앫 Fault Detection: Open, short to ground or
speed limit modes. The vehicle speed sensor Vbatt, inactive (no signal) and erratic
functions in a similar manner to the crank speed (>128 mph)
(engine speed) sensor (refer to “Crank Speed 앫 Mack P/N: 64MT439M
(Engine Speed) Sensor” on page 35). Using the
principle of magnetic induction, the sensor
generates an electric pulse each time one of the
teeth on a 16-tooth tone wheel (mounted on the
transmission output shaft) passes close to the
sensor tip.

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 VENDOR APPLICATION GUIDE V-MAC IV 07 EMISSIONS STD.

INSTRUMENT CLUSTER Ambient Air Temperature Sensor

MODULE SENSORS
The ambient air temperature sensor — generally
located toward the front of the chassis, mounted
Air Brake Application Sensor either on the front cross member behind the
bumper, on a hood hinge, hood hinge bracket,
The air brake application sensor — mounted on body panel, spring bracket or grille guard
the double check valve (attached to the tractor assembly — monitors the outside air
protection valve) — converts air pressure into an temperature. Information from this sensor is
electrical signal that is then transmitted into a displayed on the driver information display
pressure reading displayed in the instrument (Co-Pilot® or Basic Display). The sensor has a
cluster. negative temperature coefficient (this means the
sensor resistance decreases as the temperature
앫 Sensor Type: Pressure Transducer increases).
앫 Range: 0 to 174 psig 앫 Sensor Type: Thermistor, negative
앫 Voltage Supply: 5.00 ±0.25 VDC temperature coefficient
앫 Operating Temperature: −40°C to 85°C 앫 Fault Detection: Open or short to ground and
(−40°F to 185°F) short to Vbatt
앫 Fault Detection: Short to ground, loss of 앫 Mack P/N: 64MT2118M
ground, short circuit to +5V, short circuit to
battery voltage
Front Drive Axle Temperature
앫 Mack P/N: 64MT373 Sensor
Air Suspension Pressure Sensor The front drive axle temperature sensor —
located in the bottom of the front carrier —
The air suspension pressure sensor — mounted monitors the vehicle’s front axle temperature.
on the inside of the truck frame rail — measures This sensor is a thermistor that has varying
the system pressure in the truck by converting resistance according to temperature. The sensor
into an electrical signal and transmitting into a has a negative temperature coefficient (this
pressure reading displayed in the instrument means the sensor resistance decreases as the
cluster. temperature increases).
앫 Sensor Type: Pressure Transducer 앫 Sensor Type: Thermistor, negative
temperature coefficient
앫 Range: 0 to 174 psig
앫 Filter Network: 1.0 msec
앫 Voltage Supply: 5.00 ±0.25 VDC
앫 Fault Detection: Open, short to ground or
앫 Operating Temperature: −40°C to 85°C Vbatt
(−40°F to 185°F)
앫 Mack P/N: 64MT2113AM
앫 Fault Detection: Short to ground, loss of
ground, short circuit to +5V, short circuit to
battery voltage
앫 Mack P/N: 64MT373

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Fuel Level Sensor Primary and Secondary Air

Pressure Sensor
The fuel level sensor — usually located in the left
fuel tank on vehicles equipped with two fuel The primary and secondary air pressure
tanks, is a one-wire passive device that monitors sensor — located in the driver control module —
the fuel level for driver display. monitors the primary and secondary air pressure
앫 Sensor Type: Passive resistance element in the air reservoirs.
앫 Sensor Supply Voltage: 5 volts 앫 Sensor Type: Pressure Transducer
앫 Sensor Supply Current: Limited to 75 mA 앫 Range: 0 to 174 psig
maximum
앫 Voltage Supply: 5.00 ±0.25 VDC
앫 Filter Network: 1.0 msec
앫 Operating Temperature: −40°C to 85°C
앫 Fault Detection: Open (≥ 1k ohms), short to (−40°F to 185°F)
ground (≤ 20 ohms) or Vbatt
앫 Fault Detection: Short to ground, loss of
앫 Mack P/N:16MD48 ground, short circuit to +5V, short circuit to
battery voltage
Interior Cab Temperature Sensor 앫 Mack P/N: 64MT373

The interior cab temperature sensor monitors the

inside air temperature of the cabin. Information Transmission Oil Temperature
from this sensor is used by the ICM for climate Sensor
control and comfort of the cabin. The sensor has
a negative temperature coefficient (this means The transmission oil temperature sensor —
the sensor resistance decreases as the located in the transmission oil cooler elbow at the
temperature increases). transmission — monitors the temperature of the
앫 Sensor Type: Thermistor, negative lubricating oil as it exits the transmission. This
temperature coefficient sensor is a thermistor that has varying resistance
according to temperature. The sensor has a
앫 Fault Detection: Open or short to ground and negative temperature coefficient (this means the
short to Vbatt sensor resistance decreases as the temperature
앫 Mack P/N: 64MT391M increases).
앫 Sensor Type: Thermistor, negative
Rear Drive Axle Temperature temperature coefficient
Sensor 앫 Filter Network: 1.0 msec
앫 Fault Detection: Open, short to ground or
The rear drive axle temperature sensor — Vbatt
located in the bottom of the rear carrier —
앫 Mack P/N: 64MT2113AM
monitors the vehicle’s rear axle temperature. This
sensor is a thermistor that has varying resistance
Allison transmissions have an additional
according to temperature. The sensor has a
transmission oil temperature sensor on the right
negative temperature coefficient (this means the
side of the transmission that measures sump
sensor resistance decreases as the temperature
temperature. The transmission oil temperature at
increases).
the sump is generally cooler than at the cooler
앫 Sensor Type: Thermistor, negative elbow. The sensor at the elbow determines what
temperature coefficient is shown in the gauge and in most cases,
temperature faults and engine shutdown (if
앫 Filter Network: 1.0 msec
configured). For an Allison transmission, the
앫 Fault Detection: Open, short to ground or sump temperature determines transmission oil
Vbatt temperature faults and shutdown.
앫 Mack P/N: 64MT2113AM

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AUTOMATIC TRANSMISSION OIL Automated Transmissions

TEMPERATURE
The EMS can be programmed to use V-MAC IV supports the following automated
transmission temperature information (provided transmissions:
on the J1587/J1708 and J1939 communications 앫 Eaton® Autoshift
line by the Allison 4000/4500 Series) as a
determining factor for engine shutdown based on 앫 Eaton® Ultrashift
transmission sump oil temperature. A warning will 앫 Meritor ESS
be issued at 121°C (250°F) for 15 minutes or
126.6°C (260°F) for 1 minute. Engine de-rate will 앫 Meritor FreedomLine (for future support)
occur at 129.4°C (265°F). Engine shutdown will
occur at 132.2°C (270°F). OTHER AUTOMATED TRANSMISSIONS
For V-MAC IV MACK® MP7 engines, Mack
Trucks, Inc. provides the capability for connection
If vehicle speed remains above 5 km/h (3 m/h), with various automated transmissions using SAE
engine shutdown will not occur. J1939.

Manual Transmissions
Automatic Transmissions
V-MAC IV supports the following manual
V-MAC IV supports the following automatic transmissions:
transmissions: 앫 Fuller RT/FR Series
앫 Allison 4000 Series Gen 4 앫 Fuller T Series
앫 Allison 4500 Series Gen 4 앫 Spicer
앫 Meritor M/MO Series
ALLISON 4000/4500 SERIES
The Allison 4000/4500 Series requires
connection to the SAE J1587/J1708 data link and
SAE J1939 data link to communicate with the
Vehicle ECU. Information from this line can be
used to obtain tail shaft speed information instead
of a vehicle speed sensor (special data file
required).

OEM Requirements:
앫 SAE J1587/J1708 and SAE J1939 data link
connection to the Allison transmission
control

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SENSOR REQUIREMENTS 앫 All other sensors are optional and must be

supplied and installed by the OEM when
앫 Aftertreatment Fuel Pressure, Air-Humidity working with a bare engine.
Temperature, Ambient Air Temperature,
Boost Pressure, Boost Temperature,
Coolant Level, Coolant Temperature, DPF
Differential Pressure, EGR Diff Pressure, Engine Oil Temperature, Engine Oil Level, Fuel
EGR Temperature, Engine Oil Pressure, Temperature, Inlet Manifold Pressure, Vehicle
Engine Position, Engine Speed, Fan Speed, (Road) Speed, and Water in Fuel Filter sensors
Fuel Temperature, Intake Manifold Air have associated diagnostics that must be
Temperature, Throttle Position, Vehicle disabled if the sensors are not installed.
Speed, and Water in Fuel Filter sensors will
be supplied by Mack Trucks, Inc.

Vehicle speed sensors should be replaced with

resistors for stationary and marine applications.

Coolant level and throttle position sensors are

mandatory and MUST be supplied and installed
by the OEM if a bare engine is ordered.

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GAUGE DRIVER MODULE Exhaust Temperature (Pyrometer)

SENSORS Sensor
The exhaust temperature sensor — located in the
exhaust pipe — is a resistive temperature
The Gauge Driver Module is used for LEU and detector which monitors the exhaust gas
MRU truck models only. temperature of the engine. When the vehicle
exhaust temperature changes, the voltage
produced by the sensor changes. A reference
voltage is generated by a circuit with the GDM,
Air Suspension Pressure Sensor and the temperature of the exhaust gas is then
determined by comparing the sensor voltage to
Please refer to the “Air Suspension Pressure the reference voltage.
Sensor” on page 43 for information about this
sensor. 앫 Sensor Type: Resistive Temperature
Detector

Ambient Air Temperature Sensor 앫 Range: –40°C to 1000°C (–40°F to 1832°F)

앫 Fault Detection: Short to ground, loss of
Please refer to the “Ambient Air Temperature ground, short circuit +5V, short circuit to
Sensor” on page 43 for information about this battery voltage
sensor. 앫 Mack P/N: 64MT377M

Fuel Level Sensor

Please refer to the “Fuel Level Sensor” on page
44 for information about this sensor.

Primary and Secondary Air

Pressure Sensor
Please refer to the “Primary and Secondary Air
Pressure Sensor” on page 44 for information
about this sensor.

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SYSTEM INPUT SWITCHES 앫 Key Switch (ignition, preheat and start)

앫 Neutral Position (vendor manual and Allison
transmissions only)
General Switch Information
앫 Parking Brake
The V-MAC IV system receives information from 앫 PTO 1
several input switches. All switches must conform
to the following requirements: 앫 PTO 2
앫 Contact plating should not corrode or oxidize 앫 Remote Engine Shutdown
(gold-plated contacts are recommended) 앫 Service Brake
앫 Normal current draw through the contact 앫 Set/Resume
should not exceed 10.0 mA at a nominal
12 volts 앫 Spare 1 (PTO 3)
앫 Contact chatter and momentary opening or 앫 Spare 2 (PTO 4)
closing should not exceed 100 milliseconds 앫 Speed Control On/Off
in duration
앫 Water in Fuel Drain
앫 Contacts should not open or close due to
vibration or shock from the application
ICM SWITCHES
앫 Voltage thresholds (measured at V-MAC IV
switched inputs) should be within the 앫 Air Filter Restriction (sensor that acts like a
following limits: switch)

— Voltage Input (Low) < 2.0 volts 앫 Auto Start/Stop Engaged

앫 Axle Brake Wear, Front and Rear (sensors
— Voltage Input (High) > 8.0 volts
that act like a switch)
앫 Backup Lights
EMS SWITCHES
앫 Headlight High Beam
앫 Coolant Level (sensor that acts like a switch)
앫 Interwheel Front Differential Lock (actuator
앫 DPF Smart Switch status only; not from dash switch)
앫 Water in Fuel Filter (sensor that acts like a 앫 Interwheel Rear Differential Lock (actuator
switch) status only; not from dash switch)
앫 Mirror Defrost (heated mirror)
VECU SWITCHES
앫 Power Differential Lockout (inter-axle
앫 A/C Pressure differential lock switch, status)
앫 Accelerator Pedal Idle Validation (switch on 앫 Stalk Switch Selector
pedal)
앫 Turn Signals (left and right)
앫 Air Suspension
앫 Windshield Washer Level (sensor that acts
앫 Clutch Switch like a switch)
앫 Daytime Running Lights Override
앫 Engine Brake Low GDM SWITCHES
앫 Engine Brake High 앫 Air Filter Restriction
앫 Fan Clutch Override 앫 Air Pressure
앫 Fifth Wheel Slide (air-operated slide) 앫 Inter Axle Lock (Power Divided Lockout)
앫 Hood Tilt 앫 Reset
앫 Idle Shutdown Override 앫 Washer Fluid Level
앫 Interwheel Differential Lock

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A/C Pressure Switch (Optional) DPF Smart Switch

This is a normally closed switch which opens The DPF Switch is a smart switch that uses the
when A/C pressure reaches a point when fan J1939 line to send a signal to allow the operator
cooling is required. to either start or stop regeneration mode. The
switch has three positions: Top (Activate), Middle
(Neutral-Automatic Mode), and Bottom
Clutch Switch (Deactivate). The Top position is momentary and
reverts back to the Middle position upon release.
(Required for all vehicle installations and some The Bottom position will lock into place and
non-vehicle installations using engine speed remain locked until the operator presses the Top
control) position to release the switch back to the Middle
position.
The Clutch switch, mounted above the clutch
pedal, is normally open and closes when the The Top position is used to start manual
pedal is released (not pressed). It opens when regeneration mode or when illuminated, to
the pedal is pushed. Normally, speed control, indicate a regeneration is needed. The Lower
including cruise and engine brake control, will position is used to deactivate an automatic
disengage if the switch indicates that the clutch is regeneration mode. The Middle position indicates
disengaged (switch open, pedal pushed). “off.”

For additional information, please refer to the

Daytime Running Lights (DRL) Mack Trucks, Inc., Operator’s Handbooks that are
Override Switch (Optional) supplied with the truck.

Daytime Running Lights (DRL) come standard on Engine Brake Low and High Switch
all MACK vehicles and can be optioned with or
without an override switch. When the DRL (Optional)
Override switch has been specified, different
conditions can be selected that cause the DRL to The Engine Brake Low switch feeds into the
automatically activate. DRL can be automatically Vehicle ECU; however, it is used to notify the
turned on when the parking brake is released, the EMS that the driver is requesting first stage of the
engine is running or both. Using DRL will engine brake to turn on (LOW position).
illuminate the low beam headlamps at a slightly
reduced intensity. The DRL function will monitor The Engine Brake High switch feeds into the
high beams as well. If the high beams are Vehicle ECU; however, it is used to notify the
activated, the DRL will be temporarily turned off EMS that the driver is requesting the second
until high beam use ceases. stage of the engine brake to turn on (HIGH
position).
When the operator presses the DRL override
switch, the headlamps will go out if below the The signal is used for both low and high positions.
DRL speed threshold and flash if above the DRL
speed threshold for a designated period of time The following conditions are required to turn on
(parameter programmable in VCADS). It is also the engine brake:
possible to toggle the headlamps back on if
necessary. 앫 Engine Brake Low or High switch in the ON
position
앫 No fuel delivery to the engine
앫 Engine speed > 900 rpm
앫 Accelerator pedal at the 0% (low idle/0 fuel)
position

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Fan Clutch Override Switch Service Brake and Parking Brake

(Optional) Switches
This momentary contact switch feeds into the (Required for vehicle installations and some
VECU; however, it is used to notify the EMS that non-vehicle installations using engine speed
the driver is requesting the fan be turned ON (if control)
currently off) or OFF (if currently on). Override
privileges are programmed in the customer data The Service and Parking Brake switches are
spaces of the VECU and EMS. These parameters installed in the brake air system. The Service
allow the user to enable or block overrides. Brake switch is normally open and closes at an
application pressure of 6 psi. The Parking Brake
switch is normally closed and will close at a
Idle Shutdown Override Switch pressure decline of 75 psi (park brake set). It
(Optional) opens when air is delivered to the spring brake
chambers to release the spring brake.
The Idle Shutdown Override switch permits the
operator to override an idle shutdown using this BRAKE FAULT CONDITIONS
switch.
Generally, application of the parking brake while
The Idle Shutdown Override switch position the vehicle is moving will create an electronic
toggle is detected when the module senses a fault. Once the parking brake is turned off or the
positive edge trigger on the switch input (i.e., vehicle comes to a stop, the fault will become
0-volt to 12-volt transition). inactive. However, if Power Take-Off (PTO) 2 is
set up as a driveshaft PTO (and PTO 2 is
engaged), application of the parking brake while
Key Switch (Required) the vehicle is moving will not result in an
electronic fault. Driveshaft PTO operation
The key switch provides the VECU with requires that the parking brake be set while the
instructions to power the accessory relays and driveshaft is turning (creating apparent vehicle
the switched electrical power when the key is speed).
turned on. Fuel will only be supplied to the engine
when the key is in the ON position. Turning the If speed control is active and the vehicle suddenly
key to the OFF position will terminate fuel delivery decelerates without a service brake switch input,
and will cause the accessory relays/switched a service brake fault will become active. This fault
power to turn off six seconds later. will become inactive when a service brake switch
input is received. A service brake fault will not
become active if PTO 2 is set up as a driveshaft
Power Take-Off (PTO) 1 and PTO 2 PTO and PTO 2 is engaged.
Switches (Optional)
BRAKE INTERACTIONS WITH SPEED
These dedicated switches provide the VECU with CONTROL
information that PTO 1 or PTO 2 is engaged Cruise control will disengage when the service
when the switch contacts are closed. brakes are applied. Cruise control will also drop
out if the parking brake is applied.

PTO and Electronic Hand Throttle (EHT) control

Keep in mind that these are switch inputs; the can be programmed to drop out if the parking
Vehicle ECU does not engage any physical PTO. brake or service brakes are applied or to only
activate if the parking brake or service brakes are
applied.

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Set/Resume Switch (Optional) Spare 1 or PTO 3 (VECU pin VB-21)

and Spare 2 or PTO 4 (VECU pin
This momentary rocker switch controls the Set,
Decel, Resume and Accel functions. To ensure VA-17) Inputs (Optional)
that an undefined logic state does not occur, the
rocker switch uses two contacts to avoid These spare inputs are available for remapping to
simultaneous activation of both functions. When other functions for PTO 3 and PTO 4 if available.
the switch is pushed in one position, the Set
contact closes. When the switch is pushed in the
other position, the Resume contact closes.
Speed Control ON/OFF Switch

Both the Set and Resume switch positions are This two-position switch enables the speed
detected when the module senses a positive control function. When the switch is in the ON
edge trigger on the switch input (i.e., 0-volt to position, switch contacts are closed (12 volts on
12-volt transition). pin VA-3 of Vehicle ECU) and speed control is
enabled. However, speed control is not active
until a speed is set (using the Set switch or other
method). This switch should not be removed from
an existing vehicle.

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SYSTEM OUTPUTS Engine Brake Outputs

The MACK® MP7 engine brake consists of a
Buffered MPH Output one-piece cylinder head with a one-piece rocker
arm assembly. This assembly uses one solenoid
The output is intended as a buffered road speed to activate engine brake LOW or HIGH position,
signal for a vehicle speedometer (or other depending on engine oil flow to the exhaust
optional devices that require a pulsed road speed rocker arm assembly.
signal rather than reading it from the
J1708/J1587 serial link). Output is located on the 앫 Number of outputs: One
electrical equipment panel. 앫 Output Type: DC current sourcing
앫 Output Type: Frequency proportional to road 앫 Output Source: EMS
speed, 30,000 pulses/mile
앫 Output Drive (On) Current: 2 amps
앫 Output Source: Instrument Cluster Module maximum at 12 volts
앫 Waveform Type: Square wave 50% (TTL) 앫 Output High (On) Voltage: 12-volt supply
duty cycle
앫 Leakage Current: Less than 1.2 mA
앫 Source Driver: 4 volts minimum, 10 mA
maximum sourcing current 앫 Load Type: Inductive

앫 Diagnostics: Short to ground and short to 앫 Duty cycle: 100%

voltage 앫 Operating Voltage Range: 9.5 to 16 volts

Buffered RPM Output Exhaust Gas Recirculation (EGR)

Valve Output
This output is intended as a buffered tachometer
output signal for use with a tachometer (or other
optional devices that require engine speed data The EGR Valve — mounted to the exhaust
at a faster update rate than is available on the manifold — reduces oxides of nitrogen (NOx) in
J1708/J1587 serial link). Output is located on the emissions by recirculating some of the exhaust
electrical equipment panel. gas back into the intake of the engine to lower
combustion temperature.
앫 Output Type: Frequency proportional to
engine speed, 12 pulses/revolution The MACK® MP7 EMS controls the position of
앫 Output Source: Instrument Cluster Module the EGR valve. Voltage is switched to maintain a
constant average target current. In turn, the
앫 Waveform Type: Square wave 50% (TTL) actuator controls an oil pressure spool valve. The
duty cycle oil pressure drives the EGR valve to the desired
앫 Source Driver: 4 volts minimum, 10 mA position. The EMS controls both the high and low
maximum sourcing current sides of the drive.

앫 Diagnostics: Short to ground and short to 앫 Output Type: High and Low Side Drives
voltage 앫 Output Source: Switched 12V to maintain
target current
앫 Load Type: Inductive
앫 Fault Detection: Open, short to ground,
mechanical system not responding
앫 Mack P/N: 20559242

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Fan Clutch Output Power Relay Operation:

The fan clutch output is a digital (ON/OFF) drive. Initial condition is all power off. Turning the key
switch on supplies power to the VECU key switch
앫 Output Type: DC current sinking input. As a result, a portion of the VECU “wakes
앫 Output Source: EMS up” and turns on the power relay output which
supplies power to the EMS, ICM and to the rest of
앫 Output Drive (ON) Current: 1.0 amps the VECU.
maximum at 12 volts
앫 Output High (OFF) Voltage: 12-volt supply
앫 Leakage Current: Less than 1 mA The EMS’s only source of power is from the
앫 Load Type: Inductive, nom. 47 mH ± power relay circuit output. When the key switch is
turned off, the VECU holds the power relay output
앫 Resistance: 25.5 ± 1 ohms at 20°C (68°F) on until the software controlled “off time” has
앫 Pull In: 10 volts maximum at 20°C (68°F) elapsed.
앫 Diagnostics: Open/short to ground and short
to Vbatt The circuit must operate to 5.7-volt Vbatt for
12-volt application.
앫 Output Type: DC current sourcing
The fan clutch drive is designed for a fail safe 앫 Output Source: VECU
operation. Any loss of current will cause the fan to 앫 Output Drive (ON) Current: Capable of
turn on. The fan turns off when the system sinks driving one Type-2 relay over the supply
the supply current through the fan solenoid. voltage range
앫 Output High (LOW) Voltage: Ground supply
Power Relay Driver 앫 Leakage Current: Less than 0.5 mA
앫 Error Detection: Engine ECU fault if the
The power relay driver works together with the switched power does not turn off after six
key switch input and starter input to provide a seconds.
specified power interlock (described below).
Type-2 Relay Characteristics
Control Logic of the Power Relay System:
앫 Resistance: 90 ohms at 25°C (77°F)
앫 Delays turning off the power (Vpwr) to the
EMS, ICM and VECU after the key switch is 앫 Load Type: Inductive, 340 to 585 mH
turned off. The feature allows pertinent data 앫 Pull-in Volts: 7.2 volts at 23°C (73°F)
to be moved into permanent storage, as well
as permitting after-run diagnostic tests. 앫 Dropout Volts: 1.2 volts

앫 Ensures that the fuel injectors will not

operate when the key switch is off.

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Unit Injector Outputs

V-MAC IV contains six unit injector outputs. The
six outputs allow the system to control the fuel
supply and engine timing.
앫 Output Type: High and low-side drives
앫 Output Source: EMS
앫 Output Drive Voltage: Max = 60 volts
앫 Output Drive (ON) Current: 15 amps pull in
(typical)
앫 Leakage Current: Less than 0.5 mA
앫 Load Type: Inductive
앫 Minimum Coil Operating Voltage: 8 volts
앫 Mack P/N: 20702362

The system will not operate below 8-volt supply

voltage.

앫 Diagnostics:
— Open/short to ground detection, each
injector, both sides
— Short to Vbatt, each injector, both sides
— Mechanically not responding properly

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DIAGNOSTICS AND FAULT A list of possible fault codes appears on the

following pages. Current-production vehicles
CODES support MID 128 (engine controller), MID 140
(instrument cluster controller) and MID 144
The V-MAC IV system continuously monitors (vehicle controller). Abbreviations that appear in
itself and other components, including sensors the “Failure” column in the following charts are
and associated wiring and connectors. If a fault is described in the “Notes on Diagnostic Codes.”
detected, the module illuminates the electronic For troubleshooting, please refer to the V-MAC®
indicator light on the dash and marks the fault as IV Service Manual, 8-213.
active.
ELECTRICAL FAULTS FOR ENGINE MANAGEMENT SYSTEM (MID 128)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
PID 26 3 Fan Speed MS, SC+M, Broken Sensor/ Higher fuel Fault tracing elect.
SC−M, OCM, sensor/ Harness consumption, will circuit, including wires
OCG Harness work as on/off fan; and components.
100% fan speed if For E-Viscous fan
cooling is needed. only.
PID 45 3 Preheat SC+ Preheat Preheat relay Preheat relay never Fault tracing electrical
Relay relay activated. White circuit, including wires
solenoid smoke for cold and components
shorted start. Start
problems in cold
climate.
4 SC– Harness Harness Induction air is hot. Fault tracing electrical
Preheat relay is circuit, including wires
impossible to turn and components.
off.
YELLOW lamp.
5 OC Harness or Harness Preheat relay never Fault tracing electrical
Preheat Preheat relay activated. White circuit, including wires
relay smoke for cold and components.
solenoid start. Start
problems in cold
climate.

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ELECTRICAL FAULTS FOR ENGINE MANAGEMENT SYSTEM (MID 128) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
PID 81 0 DPF Diff Mod high None None Power loss.
Pressure pressure
(Catalyzed
0 DPF) Critically high None None Power loss.
pressure RED lamp.
2 Plausibility Sensor is Sensor/ None
not rational Harness YELLOW lamp.
3 SC+M, OCG Sensor/ Sensor/ None Fault tracing electrical
Harness Harness YELLOW lamp. circuit, including wires
and components.
5 OC5S, SC– Sensor/ Sensor/ None Fault tracing electrical
M, OCM Harness Harness YELLOW lamp. circuit, including wires
and components.
12 Filter Particulate DPF filter is
trap filter damaged, filled
with soot or
missing.
YELLOW lamp.
PID 81 0 DPF Diff Too high Excessive Ceased
Pressure differential regeneration.
(Non- pressure YELLOW lamp.
Catalyzed out of range
DPF)
2 Out of range Particulate None.
differential YELLOW lamp.
pressure
out of range
3 SCH YELLOW lamp.
4 SCL YELLOW lamp.
7 Missing filter Missing Ceased
filter regeneration.
YELLOW lamp.
PID 84 9 Vehicle MS from J1708 VECU Engine de-rate. Fault tracing data link
(Road) Spd VECU vehicle system circuit J1708,
speed including involved
message electronic control
does not units.
exist
(VECU
error).
PID 85 9 Cruise Ctrl MS from CC No clutch VECU Cruise control does Fault tracing data link
Status info to system not work. circuit J1939,
EMS/J1939. including involved
electronic control
units.
PID 91 9 Pedal MS from J1708 VECU None Fault tracing data link
Message VECU pedal info system circuit J1939,
not including involved
available. electronic control
units.

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ELECTRICAL FAULTS FOR ENGINE MANAGEMENT SYSTEM (MID 128) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
PID 94 1 Fuel Pressure High diff Filter/Sensor Fuel injection can
Pressure critically low pressure be affected.
over filter. YELLOW lamp.
Leakage.
3 SC+M, OCG Sensor/ Sensor/ None Fault tracing electrical
Harness Harness YELLOW lamp. circuit, including wires
and components.
5 OC5S, SC– Sensor/ Sensor/ None Fault tracing electrical
M, OCM Harness Harness YELLOW lamp. circuit, including wires
and components.
7 Low pressure High Filter/Sensor Fuel injection can Fault tracing fuel
differential be affected. supply system. Fuel
pressure YELLOW lamp. filter, fuel lines, fuel
over filter. pump, pre-filter,
Leakage. sensor, etc.
PID 97 3 Water in Fuel SC+M Harness Harness Undetected water Fault tracing electrical
Sensor in fuel can lead to circuit, including wires
engine stop. and components.
YELLOW lamp.
4 SC–M Harness Harness Will give water in Fault tracing electrical
fuel indication. circuit, including wires
YELLOW lamp. and components.

5 OC None Harness
14 Priming pump No error; None None Maybe deactivated in
active (no used for part dataset. Needed
error) indication only on vehicles with
that the ICM older than IC05.
priming ICM ICO5 and newer
pump is uses PPID 313 for
active. priming indication.
PID 98 1 Oil level Mod below Low oil None None Check oil level.
range level/ YELLOW lamp. Check sensor
Leakage condition.
1 Critically Critically None None
below range low oil level/ RED lamp.
Leakage
4 SC–pos Sensor/ Sensor/ Oil level cannot be Fault tracing electrical
Harness Harness measured. circuit, including wires
YELLOW lamp. and components.

5 SC+pos, Sensor/ Sensor/ Oil level cannot be Fault tracing electrical

OCpos, Harness Harness measured. circuit, including wires
OCneg YELLOW lamp. and components.

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ELECTRICAL FAULTS FOR ENGINE MANAGEMENT SYSTEM (MID 128) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
PID 100 1 Oil Pressure Critically Oil leakage, Oil system Low pressure,
below range broken oil power loss.
pump, RED lamp.
clogged oil
system
3 SC+M, OCG Sensor/ Sensor/ Oil pressure shows Fault tracing electrical
Harness Harness 0 in the cluster. Eng circuit, including wires
is running. and components.
YELLOW lamp.
5 OC5S, SC– Sensor/ Sensor/ Oil pressure shows Fault tracing electrical
M, OCM Harness Harness 0 in the cluster. Eng circuit, including wires
is running. and components.
YELLOW lamp.
PID 102 0 Boost Moderately VGT stuck, VGT turbo, Intermittent
Pressure above range Wastegate Wastegate powerloss.
stuck
2 Incorrect The boost Harness/ Power loss, black
pressure Sensor smoke.
sensor YELLOW lamp.
output is
showing too
high or too
low value
(abnormal
value).
3 SC+M, OCG Connectors, Connectors, Power loss P3137: Fault trace:
harness, or harness, or EGR valve closed connectors, harness,
sensor sensor power loss (major). and sensor.
YELLOW lamp.
5 OC5S, SC– Connectors, Connectors, Power loss P3137: Fault trace:
M, OCM harness, or harness, or EGR valve closed connectors, harness,
sensor sensor power loss (major). and sensor.
YELLOW lamp.
11 Incorrect The boost Harness, Power loss, black
pressure sensor, Inlet smoke.
sensor air leakage
output is
showing too
high or too
low value
(abnormal
value).

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ELECTRICAL FAULTS FOR ENGINE MANAGEMENT SYSTEM (MID 128) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
PID 103 0 Turbo Speed Rate of Mis-detection Connectors, Intermittent high Fault trace:
increase harness, or turbo speed. connectors, harness
turbo speed sensor Intermittent power and sensor.
too high loss (minor).
BLUE lamp.
1 Rate of Mis-detection Connectors, Intermittent low Fault trace:
decrease harness, or turbo speed. connectors, harness
turbo speed sensor BLUE lamp. and sensor.
too big
9 Missing Connector, Connectors, Loss of power, as a Fault trace:
sensor signal harness, harness, or result of restricted connectors, harness
(SC+, SC–, turbo speed sensor VGT position, may and sensor.
OC) sensor affect the whole
(MS, engine speed
SC+M, SC– range.
M, OCM, BLUE lamp.
OCH)

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ELECTRICAL FAULTS FOR ENGINE MANAGEMENT SYSTEM (MID 128) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
PID 105 2 Boost Temp Incorrect The boost Harness, YELLOW lamp.
temperature boost temp
sensor sensor,
output is ambient air
showing temperature
either too sensor
high or too
low value
(abnormal
value).
4 SC–M Connectors, Connectors, Engine is running Fault trace:
harness, harness, but could be connectors, harness,
sensor sensor difficult to start in sensor.
cold climate. EGR
valve closed. Cold
engine: smoke
(minor) or power
loss (minor).
Warm engine:
None
YELLOW lamp.
5 SC+M, OC Connectors, Connectors, Engine is running Fault trace:
harness, harness, but could be connectors, harness,
sensor sensor difficult to start in sensor.
cold climate. EGR
valve closed. Cold
engine: smoke
(minor) or power
loss (minor).
Warm engine:
None
YELLOW lamp.
10 Stuck The boost Harness, YELLOW lamp.
temperature sensor
sensor
output is
showing
constant
value.
PID 108 2 Ambient Air Plausibility The Power loss Sensor/EECU
Pressure ambient air (minor) YELLOW lamp.
pressure is P3524: Black
showing an smoke
abnormal (minor)
value (too
low or too
high).
3 SC+M Internal None Sensor/EECU
fault in YELLOW lamp.
EECU
4 SC–M Internal None Sensor/EECU
fault in YELLOW lamp.
EECU

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ELECTRICAL FAULTS FOR ENGINE MANAGEMENT SYSTEM (MID 128) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
PID 110 0 Coolant Moderately Extreme Extreme Power loss Fault tracing coolant
Temp above range driving driving YELLOW lamp. system.
conditions conditions,
coolant
thermostat,
fan, blocked
radiator
0 Critically Extreme Extreme Power loss
above range driving driving RED lamp.
conditions conditions,
coolant
thermostat,
fan, blocked
radiator
2 Plausibility The coolant Harness/ In some cases can
temperature Sensor have an effect on
sensor output drivability.
is showing an YELLOW lamp.
abnormal
value (too low
or too high).
4 SC–M Sensor/ Sensor/ Engine is difficult to Fault tracing electrical
Harness Harness start. Idle run circuit, including wires
regulation is and components.
deteriorated.
YELLOW lamp.
5 SC+M, OC Sensor/ Sensor/ Engine is difficult to Fault tracing electrical
Harness Harness start. Idle run circuit, including wires
regulation is and components.
deteriorated.
YELLOW lamp.
10 Stuck The coolant Harness/ Can in some cases
temperature Sensor have an effect on
sensor output drivability.
is showing YELLOW lamp.
constant
value.

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ELECTRICAL FAULTS FOR ENGINE MANAGEMENT SYSTEM (MID 128) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
PID 111 1 Coolant Level SC–M, Coolant Coolant Power loss Check coolant level.
Critically level below system RED lamp. Fault tracing electrical
below Range range; if not circuit, including wires
below and components.
range,
harness.
3 SC+M Harness Harness Coolant level Fault tracing electrical
cannot be circuit, including wires
detected. and components.
YELLOW lamp.
4 SC–M Harness Harness Coolant level Fault tracing electrical
cannot be circuit, including wires
detected. and components.
YELLOW lamp.
5 OC Harness Harness Coolant level Fault tracing electrical
cannot be circuit, including wires
detected. and components.
YELLOW lamp.
PID 153 0 Crankcase ILL_MAX Sensor out Sensor None
Pressure of range YELLOW lamp.
0 Critically The e.g. Blow-by Forced idle. Engine (The fault code will
Above Range non-filtered at piston ring. shut down remain during the
pressure NOT RED lamp. entire driving cycle,
difference crankcase unless reset.)
(between pressure
crankcase sensor or
pressure ambient air
and pressure
ambient air sensor.
pressure)
is/was
above limit.
1 ILL_MIN Sensor out Sensor None
of range YELLOW lamp.
2 Plausibility The Harness/ None
crankcase Sensor YELLOW lamp.
pressure is
showing an
abnormal
value (too
low or too
high).
3 SC+M, OCG Sensor/ Sensor/ None Fault tracing electrical
Harness Harness YELLOW lamp. circuit, including wires
and components.
5 SC+M, OCG Sensor/ Sensor/ None Fault tracing electrical
Harness Harness YELLOW lamp. circuit, including wires
and components.

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ELECTRICAL FAULTS FOR ENGINE MANAGEMENT SYSTEM (MID 128) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
PID 158 3 Battery Too high Generator/ Generator/ Possible damage Check battery status.
Voltage External External on EMS system Check charge system.
Charger Charger components
depending on the
high voltage
(>36V).
4 Too low Generator/ Generator/ Possible loss of Check battery status.
Battery Battery start functionality. Check charge system.
PID 171 2 Ambient Air No signal J1708 and Harness/ None.
Temp from CAN or CAN Cluster YELLOW lamp.
J1708 ambient air
temp
message
does not
exist
9 Ambient Air Missing or J1708 Harness/ None Fault tracing data link
Temp lost signal ambient air Cluster YELLOW lamp. circuit J1708,
from ICM temperature including involved
message electronic control
does not units.
exist.
PID 173 0 Exhaust Gas Critically None None Power loss
Temp above range
(Catalyzed
0 Moderately None None Power loss
DPF)
above range
2 Plausibility Sensor not Sensor Regeneration not
rational possible.
YELLOW lamp.
4 SC–M Sensor/ Sensor/ Regeneration not Fault tracing electrical
Harness Harness possible. circuit, including wires
YELLOW lamp. and components.

5 SG+M, OCM, Sensor/ Sensor/ Regeneration not Fault tracing electrical

OCG Harness Harness possible. circuit, including wires
YELLOW lamp. and components.

10 Stuck. Sensor is Sensor Regeneration not

stuck. possible.
YELLOW lamp.
PID 173 2 Exhaust Gas Plausibility Sensor not Sensor Regeneration not
Temp (Non- rational possible.
Catalyzed YELLOW lamp.
DPF)
3 SCH
4 SCL Sensor/ Sensor/ Regeneration not Fault tracing electrical
Harness Harness possible. circuit, including wires
YELLOW lamp. and components.

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ELECTRICAL FAULTS FOR ENGINE MANAGEMENT SYSTEM (MID 128) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
PID 175 0 Oil Temp Moderately Extreme Extreme Power loss Fault tracing cooling
above range driving driving YELLOW lamp. system.
conditions conditions;
Fan, oil
thermostat,
coolant
system,
clogged oil
cooler
0 Critically Extreme Extreme Power loss
above range driving driving RED lamp.
conditions conditions;
fan, oil
thermostat,
coolant
system,
clogged oil
cooler
2 Plausibility Temp too None None
high or too
low
4 SC–M Sensor/ Sensor/ None Fault tracing electrical
Harness Harness YELLOW lamp. circuit, including wires
and components.
5 SC+M, OC Sensor/ Sensor/ None Fault tracing electrical
Harness Harness YELLOW lamp. circuit, including wires
and components.
PID 177 0 Trans Oil Above range YELLOW lamp.
Temp
0 Above range Trans Trans oil YELLOW lamp if
cooler temperature > 154°C (309.2°F);
failure, RED lamp if
cooling > 160°C.
system Zero % reduction at
problem. 154°C (309°F); 2%
of full de-rate at
160°C (320°F); 5%
of full de-rate at
162°C (323.6°F)
with optional
shutdown.

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ELECTRICAL FAULTS FOR ENGINE MANAGEMENT SYSTEM (MID 128) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
PID 224 2 Immobilizer Incorrect data EMS and Immobilizer The engine cannot
from Immobilizer system be started.
immobilizer (or Cluster) YELLOW lamp.
unit security
codes do
not match.
12 No response Immobilizer Immobilizer The engine cannot
from unit system be started.
immobilizer installed. YELLOW lamp.
(When
Immobilizer
in Cluster is
used, the
Cluster
maybe did
not wake up
properly).
PID 228 11 Calibration MS from J1708 VECU Wrong trip data. Fault tracing data link
Factor (K) VECU calibration system circuit J1708,
factor including involved
message ECUs.
does not
exist
(VECU
error).
PID 245 9 Total Veh MS from ICM J1708 total VECU None Fault tracing data link
Distance vehicle system circuit J1708,
distance including involved
message ECUs.
does not
exist
(VECU
error).
PID 251 9 Time Data Timed out J1708 time Cluster Timestamps from Fault tracing data link
Failure data failure Cluster not circuit J1708,
message available. including involved
does not YELLOW lamp. ECUs.
exist
(Cluster
error).
PID 252 9 Date Data Timed out J1708 time Cluster Timestamps from Fault tracing data link
Failure data failure Cluster not circuit J1708,
message available. including involved
does not ECUs.
exist
(Cluster
error).

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ELECTRICAL FAULTS FOR ENGINE MANAGEMENT SYSTEM (MID 128) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
PID 354 3 Relative Air SC+M, OCG Faulty Connector, Condensation Fault trace connector,
Humidity connector, harness, control harness, sensor.
harness, sensor compromised.
sensor Possible turbo
noise.
BLUE lamp.
5 OCM, OC5V, Faulty Connector, Condensation Fault trace connector,
SC–M connector, harness, control harness, sensor.
harness, sensor compromised.
sensor Possible turbo
noise.
BLUE lamp.
PID 404 0 Compressor Critically too Excessive High ambient Power reduction. DTC is explanation for
Discharge high inlet temp temperature, de-rate, typically
Temp low ambient caused by abnormal
pressure, usage (high altitude
turbo and temperature).
compressor
inlet duct
allowing
under hood
air to enter
compressor.

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ELECTRICAL FAULTS FOR ENGINE MANAGEMENT SYSTEM (MID 128) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
PID 411 3 EGR Diff SC+M, OCG Sensor/ Connector, Possible response Fault trace connector,
Pressure Harness harness, problem. harness, sensor.
sensor Possible de-rate.
YELLOW lamp.
5 OC5S, SC– Sensor/ Connector, Possible response Fault trace connector,
M, OCM Harness harness, problem. harness, sensor.
sensor Possible de-rate.
YELLOW lamp.
7 Mechanical EGR valve Connector, Regeneration not
too open or harness, possible.
too closed sensor, EGR YELLOW lamp.
valve,
clogged
Venturi
12 Incorrect high The EGR Connector, None. Uneven Use VCADS to read
diff harness, engine running. out sensor value on
pressure sensor, EGR Possible de-rate. J1587 when engine is
sensor leakage off. Expected value =
output is (TBD), YELLOW lamp. 0 kPa. Fault trace
showing an clogged EGR suspected
abnormal cooler (TBD), components.
value (too clogged
low or too Venturi.
high).
14 Incorrect low The EGR Connector, None. Uneven Use VCADS to read
diff harness, engine running. out sensor value on
pressure sensor, EGR Possible de-rate. J1587 when engine is
sensor leakage off. Expected value =
output is (TBD), YELLOW lamp. 0 kPa. Fault trace
showing an clogged EGR suspected
abnormal cooler (TBD), components.
value (too clogged
low or too Venturi.
high).

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ELECTRICAL FAULTS FOR ENGINE MANAGEMENT SYSTEM (MID 128) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
PID 412 0 EGR Temp Above range Extreme Power loss. Extreme driving
Aftercooler driving None conditions; EGR
conditions; cooler.
EGR cooler YELLOW, RED, or
NO lamp.
4 SC–M Connector, Possible Connector, Fault trace connector,
harness, response harness, sensor. harness, sensor.
sensor problem. YELLOW lamp.
Possible
de-rate.
5 SC+M, OCM, Connector, None. Connector, Fault trace connector,
OCG harness, Possible harness, sensor. harness, sensor.
sensor de-rate. YELLOW lamp.
10 Stuck The EGR None TBD Use VCADS to read
temperature YELLOW lamp. out sensor value on
sensor J1587 when engine is
output is off and cold. Expected
showing value = Ambient temp.
constant Fault trace suspected
value. components.
PPID 55 4 ECU Temp SC−M Internal EECU None Replace control unit.
fault in
EECU
5 SC+M, OC Internal EECU None Replace control unit.
fault in
EECU
PPID 89 0 VTG SRA Mod too high Extreme Coolant Power loss (major) Fault search: Coolant
Temp driving system; (25% de-rate per system Overheated
conditions; Overheated second during 4s VGT actuator.
coolant VGT –> 100% de-rate).
system; actuator. YELLOW lamp.
Overheated
VGT
actuator.

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ELECTRICAL FAULTS FOR ENGINE MANAGEMENT SYSTEM (MID 128) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
PPID 122 1 PowerLeash™ Below range Low engine No PowerLeash™
Brake oil temp Brake.
BLUE lamp.
3 SC+ Broken Compression PowerLeash™ Fault tracing electrical
actuator/ brake Brake cannot be circuit, including wires
Harness actuator turned on. Engine and components.
break function
de-rated. Gear shift
performance
de-rated for some
automatic
transmission
boxes.
YELLOW lamp.
4 SC– Broken Compression PowerLeash™ Fault tracing electrical
actuator/ brake Brake cannot be circuit, including wires
Harness actuator turned off. Causes and components.
engine to stop.
Engine impossible
to restart.
YELLOW lamp.
5 OC Broken Compression PowerLeash™ Fault tracing electrical
actuator/ brake Brake cannot be circuit, including wires
Harness actuator turned on. Engine and components.
break function
de-rated. Gear shift
performance
de-rated for some
automatic
transmission
boxes.
YELLOW lamp.

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ELECTRICAL FAULTS FOR ENGINE MANAGEMENT SYSTEM (MID 128) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
PPID 270 2 NOx Sensor Removed Sensor Sensor None
removed YELLOW lamp.
(measures
surrounding
air)
2 Plausibility Excessive Excessive
urea dosing urea dosing
(only SCR (only for SCR
system); system);
exhaust exhaust
system system
leakage; air leakage; air
intake intake
leakage; leakage;
NOx-sensor NOx-sensor
3 SC NOx Cabling NOx-sensor Fault tracing electrical
signal between cabling; circuit, including wires
NOx-sensor Nox-sensor and components.
and
NOx-sensor
ECU;
NOx-sensor
5 OC NOx Cabling NOx-sensor Fault tracing electrical
signal between cabling; circuit, including wires
NOx-sensor NOx-sensor and components.
and
NOx-sensor
ECU;
NOx-sensor
9 Abnormal Ms from NOx-sensor
update NOx-sensor power supply.
ECU CAN
communication
between EMS
and NOx-ECU.
10 Stuck Exhaust Exhaust
system system; air
leakage; air intake
intake system;
leakage; NOx-sensor
NOx-sensor
12 Incorrect Sensor Sensor
value
13 Range check Sensor Sensor
14 MS from Too high of Battery
sensor due to a voltage to voltage
Vbatt NOx-sensor
ECU

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ELECTRICAL FAULTS FOR ENGINE MANAGEMENT SYSTEM (MID 128) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
PPID 272 4 Air Temp for SC– Faulty Fault trace Possible turbo Fault tracing electrical
Humidity connector, connector, noise. circuit, including wires
Compensation harness, harness, YELLOW lamp. and components.
sensor sensor
5 SC+, OC Faulty Fault trace Possible turbo Fault tracing electrical
connector, connector, noise. circuit, including wires
harness, harness, YELLOW lamp. and components.
sensor sensor
PPID 326 0 Soot Level Moderately High soot DPF, injector De-rate Manual regeneration
high soot load in DPF AHI clogged YELLOW lamp. needed.
load
11 Critically high High soot DPF, injector Shutdown Replace or clean DPF.
soot load load in DPF AHI clogged RED lamp.
14 Ash level too BLUE lamp. Service required.
high
PPID 328 3 After SCH Actuator/ Actuator/ Regeneration not Fault tracing electrical
Treatment Harness Harness possible. circuit, including wires
Injection YELLOW lamp. and components.
Shutoff Valve
4 (Catalyzed SCL Actuator/ Injector/ Regeneration not Fault tracing electrical
DPF) Harness Harness possible. circuit, including wires
YELLOW lamp. and components.

5 OC Actuator/ Injector/ Regeneration not Fault tracing electrical

Harness Harness possible. circuit, including wires
YELLOW lamp. and components.

7 Stuck close Shutoff Shutoff valve Regeneration not

valve stuck possible.
YELLOW lamp.
14 Leakage Shutoff Shutoff valve Regeneration not
valve possible.
leakage YELLOW lamp.
PPID 328 3 After SCH Actuator/ Actuator/ Regeneration not
Treatment Harness Harness possible.
Injection YELLOW lamp.
Shutoff Valve
4 (Non- SCL Actuator/ Actuator/ Regeneration not
Catalyzed Harness Harness possible.
DPF) YELLOW lamp.
PPID 329 3 After SCH Actuator/Ha Injector/ Regeneration not Fault tracing electrical
Treatment rness Harness possible. circuit, including wires
Fuel Injector YELLOW lamp. and components.
(Catalyzed
4 DPF) SCL Actuator/Ha Injector/ Regeneration not Fault tracing electrical
rness Harness possible. circuit, including wires
YELLOW lamp. and components.

5 OC Actuator/Ha Injector/ Regeneration not Fault tracing electrical

rness Harness possible. circuit, including wires
YELLOW lamp. and components.

14 Leakage Injector is Injector Regeneration not

leaking. possible.
YELLOW lamp.

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ELECTRICAL FAULTS FOR ENGINE MANAGEMENT SYSTEM (MID 128) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
PPID 329 3 After SCH Actuator/ Aborted and
Treatment Connector/ ceased
4 SCL
Fuel Injector Harness regeneration.
(Non- YELLOW lamp.
Catalyzed
DPF)
PPID 330 3 Discharge SC+ Connectors, Connectors, On/off valve can't Fault trace
Recirculator harness, harness, be activated. connectors, harness,
Valve actuator solenoid Regeneration not solenoid valve.
Solenoid valve possible.
High engine
braking without
request.
Drivability affected.
YELLOW lamp.
4 SC– Connectors, Connectors, Valve constantly Fault trace
harness, harness, activated. connectors, harness,
actuator solenoid Major power loss. solenoid valve.
valve Major smoke.
Exhaust manifold
overheating.
Engine shut down.
YELLOW lamp.
5 OC Connectors, Connectors, On/off valve can't Fault trace
harness, harness, be activated. connectors, harness,
actuator solenoid Regeneration not solenoid valve.
valve possible.
High engine
braking without
request.
Drivability affected.
YELLOW lamp.
7 Mechanically Leaking Leaking On/off valve can't Fault trace pipes,
stuck pipes, pipes, be activated. solenoid valve, and
solenoid solenoid Regeneration not valve.
valve, valve valve, valve possible.
High engine
braking without
request.
Drivability affected.
Valve constantly
activated.
Major power loss.
Major smoke.
Exhaust manifold
overheating.
Engine shut down.
YELLOW lamp.
PPID 333 3 Engine Fan SC+ YELLOW lamp.
4 Thermal SC– YELLOW lamp.
Switch
5 OC YELLOW lamp.

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ELECTRICAL FAULTS FOR ENGINE MANAGEMENT SYSTEM (MID 128) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
PPID 337 0 Ash Level in Ash level too Need Short intervals
DPF high service between filter
(Catalyzed regeneration.
DPF) YELLOW lamp.
PPID 337 14 Ash Level in Special Need None. Component
DPF instruction service YELLOW lamp. maintenance required.
(Non-Catalyz
ed DPF)
PPID 340 3 Supplemental SCH YELLOW lamp.
Air Valve
4 (Non- SCL
Catalyzed
DPF)
PPID 387 2 Exhaust Gas Plausibility Sensor not Sensor Regeneration not
Temp Sensor rational possible.
#2 YELLOW lamp.
(Catalyzed
4 DPF) SC–M Sensor/ Sensor/ Regeneration not Fault tracing electrical
Harness Harness possible. circuit, including wires
YELLOW lamp. and components.

5 SC+M, OCM, Sensor/ Sensor/ Regeneration not Fault tracing electrical

OCG Harness Harness possible. circuit, including wires
YELLOW lamp. and components.

10 Stuck Sensor is Sensor Regeneration not

stuck. possible.
YELLOW lamp.
PPID 436 0 Exhaust Gas Too high Regeneration None
Temp Sensor temp too high
#3
2 Plausibility Sensor not Sensor Regeneration not
(Catalyzed
rational possible.
DPF)
4 SC–M Sensor/ None Sensor/Harness Fault tracing electrical
Harness circuit, including wires
and components.
5 SC+M, OCM, Sensor/ None Sensor/Harness Fault tracing electrical
OCG Harness circuit, including wires
and components.
10 Stuck Sensor is Sensor Regeneration not
stuck. possible.
PPID 436 0 Filter Inlet Too high Ceased
Temperature multiple times regeneration.
(Non- YELLOW lamp.
Catalyzed
2 DPF) Plausibility YELLOW lamp.
3 SCH YELLOW lamp.
4 SCL YELLOW lamp.
14 Too high Aborted
regeneration.
NO lamp.

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ELECTRICAL FAULTS FOR ENGINE MANAGEMENT SYSTEM (MID 128) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
PPID 437 2 After Plausibility Sensor is Sensor, Regeneration not
Treatment not rational. shutoff valve possible.
Injector Fuel YELLOW lamp.
Pressure
3 SC+M, OCG Sensor/ Sensor/ Regeneration not Fault tracing electrical
Harness Harness possible. circuit, including wires
YELLOW lamp. and components.

5 OC5S, Sensor/ Sensor/ Regeneration not Fault tracing electrical

SC–M, OCM Harness Harness possible. circuit, including wires
YELLOW lamp. and components.

10 Stuck Sensor is Sensor, Regeneration not

stuck. shutoff valve, possible.
injector
PPID 440 1 Flame Temp Multiple lost Ceased
(Non- flames regeneration.
Catalyzed YELLOW lamp.
DPF)
2 Plausibility Ceased
regeneration.
YELLOW lamp.
3 SCH Ceased
regeneration.
YELLOW lamp.
4 SCL Ceased
regeneration.
YELLOW lamp.
14 Lost flame Aborted
regeneration.
NO lamp.
PPID 442 3 Cold Junction SCH NO lamp.
Temperature
4 SCL
(Non-
Catalyzed
DPF)

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ELECTRICAL FAULTS FOR ENGINE MANAGEMENT SYSTEM (MID 128) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
SID 1 3 Injector 1 SC+, Low Harness Harness Loss of power and Fault tracing electrical
Side SV/NCV shorted uneven running. circuit, including wires
Run on three to five and components.
cylinders.
YELLOW lamp.
5 SC+, SC–, Harness/ Injector/ Loss of power and Fault tracing electrical
OC, High Broken Harness uneven running. circuit, including wires
Side solenoid Run on three to five and components.
SV/NCV; cylinders.
SC–, Low YELLOW lamp.
Side SV/NCV
7 Out of Low or high Injector, see Larger errors can
calibration flow injector; Probable be noticeable at
bad Error. engine idle speed.
compression YELLOW lamp.
12 Low injector Injector/ Injector/ YELLOW lamp.
hold current Harness Harness
resistance
too high
SID 2 3 SC+, Low Harness Harness Loss of power and Fault tracing electrical
Side SV/NCV shorted uneven running. circuit, including wires
Run on three to five and components.
cylinders.
YELLOW lamp.
5 SC+, SC–, Harness/ Injector/ Loss of power and Fault tracing electrical
OC, High Broken Harness uneven running. circuit, including wires
Side solenoid Run on three to five and components.
SV/NCV; cylinders.
SC–, Low YELLOW lamp.
Side SV/NCV
7 Out of Low or high Injector, see Larger errors can
calibration flow injector; Probable be noticeable at
bad Error. engine idle speed.
compression YELLOW lamp.
12 Low injector Injector/ Injector/ YELLOW lamp.
hold current Harness Harness
resistance
too high

Page 75
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ELECTRICAL FAULTS FOR ENGINE MANAGEMENT SYSTEM (MID 128) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
SID 3 3 Injector 3 SC+, Low Harness Harness Loss of power and Fault tracing electrical
Side SV/NCV shorted uneven running. circuit, including wires
Run on three to five and components.
cylinders.
YELLOW lamp.
5 SC+, SC−, Harness/ Injector/ Loss of power and Fault tracing electrical
OC, High Broken Harness uneven running. circuit, including wires
Side solenoid Run on three to five and components.
SV/NCV; cylinders.
SC−, Low YELLOW lamp.
Side SV/NCV
7 Out of Low or high Injector, see Larger errors can
calibration flow injector; Probable be noticeable at
bad Error. engine idle speed.
compression YELLOW lamp.
12 Low injector Injector/ Injector/ YELLOW lamp.
hold current Harness Harness
resistance
too high
SID 4 3 Injector 4 SC+, Low Harness Harness Loss of power and Fault tracing electrical
Side SV/NCV shorted uneven running. circuit, including wires
Run on three to five and components.
cylinders.
YELLOW lamp.
5 SC+, SC−, Harness/ Injector/ Loss of power and Fault tracing electrical
OC, High Broken Harness uneven running. circuit, including wires
Side solenoid Run on three to five and components.
SV/NCV; cylinders.
SC−, Low YELLOW lamp.
Side SV/NCV
7 Out of Low or high Injector, see Larger errors can
calibration flow injector; Probable be noticeable at
bad Error. engine idle speed.
compression YELLOW lamp.
12 Low injector Injector/ Injector/ YELLOW lamp.
hold current Harness Harness
resistance
too high

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ELECTRICAL FAULTS FOR ENGINE MANAGEMENT SYSTEM (MID 128) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
SID 5 3 Injector 5 SC+, Low Harness Harness Loss of power and Fault tracing electrical
Side SV/NCV shorted uneven running. circuit, including wires
Runs on three to and components.
five cylinders.
YELLOW lamp.
5 SC+, SC–, Harness/ Injector/ Loss of power and Fault tracing electrical
OC, High Broken Harness uneven running. circuit, including wires
Side solenoid Runs on three to and components.
SV/NCV; five cylinders.
SC–, Low YELLOW lamp.
Side SV/NCV
7 Out of Low or high Injector, see Larger errors can
calibration flow injector; Probable be noticeable at
bad Error. engine idle speed.
compression YELLOW lamp.
12 Injector 5 Low injector Injector/ Injector/ YELLOW lamp.
hold current Harness Harness
resistance
too high
SID 6 3 Injector 6 SC+, Low Harness Harness Loss of power and Fault tracing electrical
Side SV/NCV shorted uneven running. circuit, including wires
Runs on three to and components.
five cylinders.
YELLOW lamp.
5 SC+, SC–, Harness/ Injector/ Loss of power and Fault tracing electrical
OC, High Broken Harness uneven running. circuit, including wires
Side solenoid Runs on three to and components.
SV/NCV; five cylinders.
SC–, Low YELLOW lamp.
Side SV/NCV
7 Out of Low or high Injector, see Larger errors can
calibration flow injector; Probable be noticeable at
bad Error. engine idle speed.
compression YELLOW lamp.
12 Low injector Injector/ Injector/ YELLOW lamp.
hold current harness Harness
resistance
too high

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ELECTRICAL FAULTS FOR ENGINE MANAGEMENT SYSTEM (MID 128) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
SID 18 3 Water-In- SC+ Broken Water-in-fuel Valve constantly Fault tracing electrical
(for Fuel Valve solenoid, valve driver shut. circuit, including wires
MACK® wire or (either 10 YELLOW lamp. and components.
MP8 EMS driver Amp Driver 2
engines output or A33
only) actuator)
4 SC– Broken Water-in-fuel High fuel Fault tracing electrical
solenoid, valve driver consumption due to circuit, including wires
wire or (either 10 fuel leakage. and components.
EMS driver Amp Driver 2 YELLOW lamp.
output or A33
actuator)
5 OC Broken Water-in-fuel Valve constantly Fault tracing electrical
solenoid or valve driver shut. circuit, including wires
wire (either 10 YELLOW lamp. and components.
Amp Driver 2
or A33
actuator)
SID 21 2 CAM Speed Phase error Bad Engine Fuel consumption Fault tracing electrical
Sensor correlation transmission increased. circuit, including wires
between BLUE lamp. and components.
CAM and Check sensor
crank; condition and
engine installation.
trans not
correct.
3 MS from cam Sensor/ Harness The engine start Fault tracing electrical
sensor (SC+, Harness time will increase. circuit, including wires
SC–, OC) Possible loss of and components.
power. Check sensor
BLUE lamp. condition and
installation.
8 Noisy, OC Harness/ Sensor/ The engine start Fault tracing electrical
Sensor Harness time will increase. circuit, including wires
mounting Possible loss of and components.
power. Check sensor
BLUE lamp. condition and
installation.

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ELECTRICAL FAULTS FOR ENGINE MANAGEMENT SYSTEM (MID 128) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
SID 22 2 Crank Speed Intermittent or Harness/ Sensor/ The engine start Fault tracing electrical
Sensor weak signal Sensor Harness time will increase. circuit, including wires
mounting Engine is running and components.
with imprecise Check sensor
timing causing risk condition and
of high fuel installation.
consumption and
smoke.
Cylinder balancing
not working with
risk of uneven
running.
Possible loss of
power.
YELLOW lamp.
3 MS from Harness/ Sensor/ The engine start Fault tracing electrical
crank sensor Sensor Harness time will increase. circuit, including wires
(SC+, SC–, mounting Engine is running and components.
OC) with imprecise Check sensor
timing causing risk condition and
of high fuel installation.
consumption and
smoke.
Cylinder balancing
not working with
risk of uneven
running.
Possible loss of
power.
YELLOW lamp.
8 Noisy Sensor Sensor/Lack Engine is running Fault tracing electrical
mounting of shims with imprecise circuit, including wires
timing causing risk and components.
of high fuel Check sensor
consumption and condition and
smoke. installation.
Cylinder balancing
not working with
risk of uneven
running.
Possible loss of
power.
YELLOW lamp.

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 VENDOR APPLICATION GUIDE V-MAC IV 07 EMISSIONS STD.

ELECTRICAL FAULTS FOR ENGINE MANAGEMENT SYSTEM (MID 128) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
SID 27 2 VGT SRA Incorrect CAN2, CAN2, Nozzle opens, low
disturbance disturbance boost, low power,
on CAN2 on CAN 2 no smoke.
no interruption. YELLOW lamp.
interruption.
4 Short to Connectors, Connectors, SRA will continue Fault trace
ground harness, low harness, low to attempt to connectors, harness
battery battery maintain target (CAN2), supply to
voltage voltage nozzle position, or VGT actuator and
nozzle will open VGT actuator.
resulting in low
power and boost.
YELLOW lamp.
7 Mechanical Restriction SRA position Power loss in some Perform calibration.
problem detected is not cases when
when running tracking actuator motor has
learn command. been disabled.
sequence. Actuator Low boost and
SRA position motor effort smoke.
is not tracking temporarily YELLOW lamp.
command. limited to
Actuator prevent
motor effort overheating.
temporarily Slow to follow
limited to the
prevent commands.
overheating.
Slow to follow
the
commands
9 Missing Connectors. Connectors. De-rate (major). Fault trace
signal Harness Harness EGR valve closed. connectors, harness
(CAN2). (CAN2). (CAN2), supply to
YELLOW lamp. VGT actuator and
No supply to No supply to VGT actuator.
VGT VGT
actuator. actuator.
VGT VGT
actuator. actuator.
13 Out of Failed self- SRA None or possible
calibration calibration low boost.
during learn YELLOW lamp.
period.
End
position
control that
is
performed
at every
start has
not been
approved.

Page 80
 VENDOR APPLICATION GUIDE V-MAC IV 07 EMISSIONS STD.

ELECTRICAL FAULTS FOR ENGINE MANAGEMENT SYSTEM (MID 128) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
SID 33 3 Cooling Fan SC+ Broken Actuator/ Fan runs at full Fault tracing electrical
Control actuator, Harness speed. Increased circuit, including wires
wire or fuel consumption and components.
EMS driver may be seen.
output YELLOW lamp.
4 SC– Broken Actuator/ Fan always Fault tracing electrical
actuator, Harness deactivated. circuit, including wires
wire or YELLOW lamp. and components.
EMS driver
output
5 OC Broken Actuator/ Fan runs at full Fault tracing electrical
actuator or Harness speed. Increased circuit, including wires
wire fuel consumption and components.
may be seen.
BLUE lamp.
SID 39 0 Starter Input Starter over The starter None The starter motor is
heated motor is deactivated.
deactivated NO lamp.
due to
overheating.
3 SC+ Start Relay/ Start Relay/ Impossible to Fault tracing electrical
Harness Harness activate starter circuit, including wires
motor. and components.
YELLOW lamp.
5 OC Start Relay/ Start Relay/ Impossible to Fault tracing electrical
Harness Harness activate starter circuit, including wires
motor. and components.
YELLOW lamp.
10 Cogwheel The starter Starter motor The starter motor is
synchronization motor is deactivated.
deactivated NO lamp.
due to
cogwheel
lock.
SID 70 3 Preheat SC+ Sensor wire Preheat Fuse for shorting Fault tracing electrical
Sensor 1 SC+ or sensor 1 wire breaks. circuit, including wires
preheat Preheat relay YELLOW lamp. and components.
relay
broken.
4 SC– Sensor wire Preheat Preheat relay Fault tracing electrical
SC– or sensor 1 problem or sensor circuit, including wires
preheat Preheat relay short circuited (–). and components.
relay YELLOW lamp.
broken.
5 OC Heating Might get start Fault tracing electrical
element or problems in cold circuit, including wires
wire climate. and components.
broken. YELLOW lamp.

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ELECTRICAL FAULTS FOR ENGINE MANAGEMENT SYSTEM (MID 128) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
SID 71 3 Preheat SC+ Sensor wire Preheat Fuse for shorting Fault tracing electrical
Sensor 2 SC+ or sensor 2 wire breaks. circuit, including wires
preheat Preheat relay YELLOW lamp. and components.
relay
broken.
4 SC– Sensor wire Preheat Preheat relay Fault tracing electrical
SC– or sensor 2 problem or sensor circuit, including wires
preheat Preheat relay short circuited (–). and components.
relay YELLOW lamp.
broken.
5 OC Heating Might get start Fault tracing electrical
element or problems in cold circuit, including wires
wire climate. and components.
broken. YELLOW lamp.
SID 146 3 EGR Valve 1 Stuck valve, Broken Harness, Power loss. Fault tracing electrical
(LISK) H-bridge, actuator, EGR valve YELLOW lamp. circuit, including wires
SC+ or SC– wire or and components.
EMS driver See symptoms for
closed and/or open Check actuator
output condition and
valve (TBD).
installation.
5 OC Broken Connector, Power loss (TBD). Fault tracing electrical
actuator or harness, YELLOW lamp. circuit, including wires
wire EGR valve and components.
See symptoms for
closed and/or open Check actuator
valve (TBD). condition and
installation.
SID 211 3 5V Supply 2 Above range Harness, Harness/PID Unexpected Fault tracing electrical
(SC high sensor, 27, PID94, information in circuit, including wires
side) power PID100, cluster. and components.
supply PID153, YELLOW lamp.
PID362
4 Below range Harness, Harness/PID Unexpected Fault tracing electrical
(SC low side) sensor, 27, PID94, information in circuit, including wires
power PID100, cluster. and components.
supply PID153, YELLOW lamp.
PID362
SID 230 3 Buffered Idle SC+ Harness YELLOW lamp. Fault tracing electrical
Validation circuit, including wires
Switch and components.
5 SC–, OC Harness YELLOW lamp. Fault tracing electrical
circuit, including wires
and components.
SID 231 2 CAN1 J1939 SC+, SC– or Harness Harness PTO, cruise control Fault tracing data link
Communication OC on either and engine brake circuit J1939,
Link line do not work. including involved
Torque control from ECUs.
automatic
transmission,
traction control
system and
distance control do
not work.
YELLOW lamp.

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ELECTRICAL FAULTS FOR ENGINE MANAGEMENT SYSTEM (MID 128) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
SID 232 3 5V Supply 1 Above range Harness, Harness/ Unexpected Fault tracing electrical
sensor, PID26, information in circuit, including wires
power PID102, cluster. and components.
supply PID132, YELLOW lamp.
PID164,
PID411
4 Below range Harness, Harness/ Unexpected Fault tracing electrical
sensor, PID26, information in circuit, including wires
power PID102, cluster. and components.
supply PID132, YELLOW lamp.
PID164,
PID411
SID 240 2 Programming Check sum No software Software The engine cannot
Memory error download be started.
application RED lamp.
7 Development None None None
SW BLUE lamp.
11 Test cell None None None
mode YELLOW lamp.
12 Programming ECC fault Error on Software, No functionality.
Memory code-part EMS RED lamp.
of flash, or
RAM, or
erased
vendor
area.
SID 253 2 Dataset Check sum The engine cannot Replace ECU.
Memory error be started.
RED lamp.
12 Check sum Damaged RED lamp. Reprogram and/or
error vendor EECU replace ECU.
14 Check sum Loss of log data Replace ECU.
error on E2 and some user
configurable data.
RED lamp.
SID 254 3 RAM RAM The engine cannot Replace ECU.
addressing be started.
failure. RED lamp.
12 Write to RAM The engine cannot Replace ECU.
does not be started.
work. RED lamp.
PSID 22 7 Aftertreatment Multiple failed Ceased
Combustion ignitions regeneration.
System (Non- YELLOW lamp.
Catalyzed
14 DPF) Failed ignition Aborted
regeneration.
NO lamp.

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ELECTRICAL FAULTS FOR ENGINE MANAGEMENT SYSTEM (MID 128) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
PSID 25 0 Aftertreatment Idle timer Vehicle has Engine derate
System critically too idled too active, white
Conditioning high long without smoke, high temp
(Catalyzed completing spikes in DPF upon
DPF) a periodic resuming driving or
heat mode. stationary
regeneration.
RED lamp.
7 Idle timer Vehicle has White smoke, high
moderately idled too temp spikes in DPF
too high long without upon resuming
completing driving or
a periodic stationary
heat mode. regeneration.
YELLOW lamp.
PSID 40 1 Insufficient Critically too FLASHING lamp.
Reagent low
Quality
14 Moderately
too low
PSID 41 1 Too Low Critically low FLASHING lamp.
Reagent
14 Moderately
Consumption
too low
PSID 42 14 Interruption No dosing FLASHING lamp.
of Dosing
Activity

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ELECTRICAL FAULTS FOR ENGINE MANAGEMENT SYSTEM (MID 128) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
PSID 43 2 Incorrect Extreme cold FLASHING lamp.
EGR Flow ambient
temperature
conditions,
PTO
operation with
limited
exhaust
temperatures,
driver
intervention,
DRV, turbo.
14 Extreme cold
ambient
temperature
conditions,
PTO
operation with
limited
exhaust
temperatures,
driver
intervention,
DRV, turbo.
PSID 44 14 Deactivation FLASHING lamp.
of EGR
PSID 45 0 High NOx FLASHING lamp. Root cause unknown
14
PSID 46 2 NOx FLASHING lamp.
Monitoring
14
Failure
PSID 47 0 DPF Plausibility Regen not
Regeneration too high possible.
(Catalyzed YELLOW lamp.
1 Plausibility
DPF)
too low
12 Regeneration Injector Injector, DPF None.
is not efficient clogged, catalyst NO lamp.
clogged or
damage to
DPF
catalyst
PSID 47 7 DPF Mechanical Exhaust pipe Engine Aborted and
Regeneration problem disconnected exhaust pipe. ceased
(Non- before DPF. regeneration.
Catalyzed Reverse Regen not
DPF) exhaust flow possible.
out of DPF YELLOW lamp.
inlet.
8 Excessive NO lamp.
regeneration
period

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ELECTRICAL FAULTS FOR ENGINE MANAGEMENT SYSTEM (MID 128) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
PSID 49 3 Ignition SCH NO lamp.
Switch
4 SCL
Voltage
(Non-
Catalyzed
DPF)
PSID 57 0 Battery Too high Aborted and
Voltage ceased
1 Too low
(Non- regeneration.
Catalyzed YELLOW lamp.
DPF)
3 SCH NO lamp.
4 SCL YELLOW lamp.
PSID 58 3 Master Air SCH YELLOW lamp.
Solenoid
4 SCL Aborted and
ceased
regeneration.
YELLOW lamp.
PSID 59 3 Atomization SCH YELLOW lamp.
and
4 SCL Aborted and
Combustion
ceased
Air Solenoids
(Non- regeneration.
Catalyzed YELLOW lamp.
DPF)
PSID 98 0 Boost Air Too high The Boost EGR system. Turbo surge (worst Fault search EGR
System pressure is Turbo case). system and turbo.
too high. NO lamp.
EGR
system
Turbo
1 Too low Pipes, Inlet air Power loss, black Fault search pipes,
bracket, system smoke, slow bracket, cooler,
cooler, leakage, response. EGR-system, turbo.
turbo, EGR- pipes, NO lamp.
system Bracket,
cooler,
EGR-system,
turbo
PSID 108 7 After Mechanical ATI system AT fuel Regeneration not Fault tracing electrical
Treatment problem injector, AT possible. circuit, including wires
Injection injection, Power loss. and components.
(ATI) System shutoff valve,
AT injection Engine shut down.
fuel pressure
PSID 110 3 Ignition Coil SCH Ceased
(Non- regeneration.
4 Catalyzed SCL
YELLOW lamp.
DPF)

Page 86
 VENDOR APPLICATION GUIDE V-MAC IV 07 EMISSIONS STD.

ELECTRICAL FAULTS FOR ENGINE MANAGEMENT SYSTEM (MID 128) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
PSID 111 3 Fuel Pump SCH YELLOW lamp.
(Non-
4 SCL Aborted and
Catalyzed
DPF) ceased
regeneration.
YELLOW lamp.
PSID 113 0 Sensor Too high Aborted and
Voltage ceased
1 Supply (Non- Too low regeneration.
3 Catalyzed SCH YELLOW lamp.
DPF)
4 SCL
PSID 114 9 DPF Switch Missing Missing Harness NO lamp.
signal signal from
DPF Smart
Switch
12 Bad device
PSID 161 12 VIN Check 1 Bad device No answer EMS does Fueling disabled. This fault code may
from VIN not get VIN Engine start not not be supported in
numbers allowed. the US.
from two
other units YELLOW lamp.
(commonly
VECU and
LCM
M/APM).
Should be
sent in
PID 237.
PSID 162 2 VIN Check 2 Data erratic Incorrect VIN numbers Fueling disabled. This fault code may
answer do not agree Engine start not not be supported in
from VIN in EMS and allowed. the US.
two other
units YELLOW lamp.
(commonly
VECU and
LCM/APM).
PSID 201 9 CAN1 J1939 No contact Missing Harness PTO, cruise control Fault tracing data link
Comm Time with the data from and engine brake circuit J1939,
Out VECU. VECU, do not work including involved
harness. anymore. ECUs.
PSID 202 9 CAN 1 J1939 No contact Missing Harness, None.
Comm Time with MID 140 data from cluster
Out cluster,
harness
PSID 205 9 Transmission MS from ETC2 not None. May be deactivated in
Electronic Transmission responding part data set.
Control Unit ECU
(ECU) Status
PSID 232 2 CAN2 J1939 SC+, SC– or Harness Harness No urea Fault tracing data link
Comm Time OC on either consumption. circuit J1939,
Out line. No VGT control. including involved
ECUs.
Power loss.
YELLOW lamp.

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ELECTRICAL FAULTS FOR ENGINE MANAGEMENT SYSTEM (MID 128) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
PSID 249 9 CAN Frames Time out. CAN cables, CAN cables, No regeneration.
from Thermal connectors, connectors, Thermal
Regeneration Thermal Thermal Regeneration Unit
Unit (Non- Regeneration Regeneration does not start.
Catalyzed Unit module Unit module YELLOW lamp.
DPF)
12 Watchdog Multiple time Aborted and
Timeout outs. ceased
(Non- regeneration.
Catalyzed YELLOW lamp.
DPF)
14 Time out. NO lamp.

ABBREVIATIONS DESCRIPTION
SC+5S Short Circuit+, 5V Supply Line
SC–5S Short Circuit–, 5V Supply Line
MS Missing Signal (Loss of Signal). Signal unavailable or not regularly updated.
SC+M Short Circuit+, Measuring line
SC–M Short Circuit–, Measuring line
OCM Open Circuit, Measuring line
OCG Open Circuit, Ground line
Noisy Disturbances on Measuring line
SC+ Pos Short Circuit+, Positive side
SC– Neg Short Circuit–, Negative side
ILL_MIN Out of range, min voltage, illegal
ILL_MAX Out of range, max voltage, illegal
SC+ LS Short Circuit+ Low Side
SC– HS Short Circuit High Side

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 VENDOR APPLICATION GUIDE V-MAC IV 07 EMISSIONS STD.

ELECTRICAL FAULTS FOR INSTRUMENT CLUSTER MODULE (MID 140)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
PID 77 0 Front Rear Temp over RED lamp. Optional sensor
Axle Temp warning
threshold
5 Open circuit YELLOW lamp.
6 Circuit
shorted to
ground
PID 78 0 Rear Rear Temp over RED lamp. Optional sensor
Axle Temp warning
threshold
5 Open circuit YELLOW lamp.
6 Circuit
shorted to
ground
PID 96 5 Fuel Level Open circuit YELLOW lamp.
6 Circuit
shorted to
ground
PID 110 9 Engine Oil Abnormal YELLOW lamp.
Pressure Update rate
GuardDog
PID 110 9 Engine Abnormal YELLOW lamp.
Coolant Update rate
GuardDog
PID 116 3 Air Voltage above YELLOW lamp.
Application normal or
Transducer shorted high
4 Voltage below
normal or
shorted low
PID 117 3 Primary Air Voltage above YELLOW lamp.
Pressure normal or
Transducer shorted high
4 Voltage below
normal or
shorted low
PID 118 3 Secondary Voltage above YELLOW lamp.
Air normal or
Pressure shorted high
Transducer
4 Voltage below
normal or
shorted low

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 VENDOR APPLICATION GUIDE V-MAC IV 07 EMISSIONS STD.

ELECTRICAL FAULTS FOR INSTRUMENT CLUSTER MODULE (MID 140) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
PID 158 0 System Voltage too Data valid
Voltage high but above
normal
operational
range
1 Voltage too Data valid
low but below
normal
operational
range
3 Voltage too High battery YELLOW lamp.
high voltage
4 Voltage too Low battery
low voltage
PID 170 5 Interior Open circuit Faulty Harness/ Gauge needle Measure cable,
Temperature Harness/ Sensor moves to zero harness, sensor.
6 Circuit
Sensor Sensor position. Optional sensor.
shorted to
ground YELLOW lamp.

PID 171 5 Ambient Open circuit Faulty Harness/ Gauge needle Measure cable,
Temperature Harness/ Sensor moves to zero harness, sensor.
6 Circuit
Sensor Sensor position. Optional sensor.
shorted to
ground YELLOW lamp.

PID 173 5 Exhaust Open circuit Faulty Harness/ Gauge needle Measure cable,
Temperature Harness/ Sensor moves to zero harness, sensor.
6 Circuit Sensor position.
shorted to Optional sensor.
ground YELLOW lamp.

PID 177 5 Trans Oil Open circuit Faulty Harness/ Gauge needle Measure cable,
Temperature Harness/ Sensor moves to zero harness, sensor.
6 Circuit Sensor position.
shorted to Optional sensor
ground YELLOW lamp.
9 Trans Oil Abnormal J1939 Trans MID 130 YELLOW lamp. Fault trace link.
Temperature update rate ECU faulty/ Transmission
GuardDog broken
PID 358 3 Air Voltage above Faulty Harness/ Gauge needle Measure cable,
Suspension normal or Harness/ Sensor moves to zero harness, sensor.
Pressure shorted low Sensor position. Optional sensor.
Transducer YELLOW lamp.
4 Voltage below
normal or
shorted low
PID 439 9 Boost Abnormal J1587 EMS MID 128 YELLOW lamp. Fault trace J1587.
Pressure update rate Faulty/ Engine
GuardDog Broken
PSID 47 12 Steering Bad intelligent Faulty Harness/ YELLOW lamp. MP or Cummins engine.
Stalk device Harness/ Stalk Switch Measure cable,
Escape Unit harness, stalk switch.
Button
PSID 48 12 Steering Bad intelligent Faulty Harness/ YELLOW lamp. Measure cable,
Stalk device Harness/ Stalk Switch harness, sensor.
ENTER Unit
Button

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 VENDOR APPLICATION GUIDE V-MAC IV 07 EMISSIONS STD.

ELECTRICAL FAULTS FOR INSTRUMENT CLUSTER MODULE (MID 140) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
PSID 49 12 Steering Bad intelligent Faulty Harness/ YELLOW lamp.
Stalk UP device Harness/ Stalk Switch
Button Unit
PSID 50 12 Steering Bad intelligent Faulty Harness/ YELLOW lamp. With automated manual
Stalk device Harness/ Stalk Switch or Allison transmission.
DOWN Unit
Button
PSID 53 3 Engine Voltage above Faulty MID 128 YELLOW lamp.
Speed, normal or Harness/ Engine
High shorted high Unit
Voltage
4 Engine Voltage below
Speed, Low normal or
Voltage shorted low
PSID 54 3 Vehicle Voltage above Faulty MID 128 YELLOW lamp.
Speed, normal or Harness/ Engine
High shorted high Unit
Voltage
4 Vehicle Voltage below
Speed, Low normal or
Voltage shorted low
PSID 200 9 J1939 Timeout on CAN 1 J1939 Down/ YELLOW lamp. MP or Cummins engine
Datalink, J1939 communication Shorted Fault trace J1939 link.
MID 128 communication down
from EECU
(MID 128)
PSID 201 9 J1939 Timeout on CAN 1 J1939 Down/ YELLOW lamp. Fault trace J1939 link.
Datalink, J1939 communication Shorted
MID 144 communication down
from VECU
(MID 144)
PSID 204 9 J1939 Timeout on CAN 1 J1939 Down/ YELLOW lamp. Fault trace J1939 link.
Datalink, J1939 communication Shorted
MID 136 communication down
from ABS
(MID 136)
PSID 205 9 J1939 Timeout on CAN 1 J1939 Down/ YELLOW lamp. With automated manual
Datalink, J1939 communication Shorted or Allison transmission.
MID 130 communication down Fault trace J1939 link.
from
transmission
(MID 130)
SID 231 9 J1939 link No CAN 1 J1939 Down/ YELLOW lamp. Fault trace J1939 link.
communication communication Shorted
on J1939 link down
SID 250 9 J1708 No J1587 J1587 Down/ YELLOW lamp. Fault trace J1587 link.
link/J1587 communication communication Shorted
link on down
J1708/J1587
link
PPID 119 9 Engine Abnormal J1587 EMS MID 128 YELLOW lamp. Fault trace J1587 link.
Coolant update rate faulty/ engine
GuardDog broken

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 VENDOR APPLICATION GUIDE V-MAC IV 07 EMISSIONS STD.

ELECTRICAL FAULTS FOR VEHICLE ECU (MID 144)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
PID 83 14 Vehicle Special NO lamp. Example of special
(Road) vehicle speed vehicle speed limit:
Speed Limit limit Lowered Air
Status exceeded. Suspension RSL.
PID 84 2 Vehicle Vehicle speed Harness YELLOW lamp. Measure cable harness
(Road) sensor and tachometer
Speed tamper component.
detected or
ABS wheel
speed data
missing on
J1587.
2 Invalid output With automated manual
shaft speed or Allison transmission.
signal
broadcast by
automated
manual or
Allison trans
on J1939 and
J1587 output
shaft speed
signal
missing.
2 Wheel speed With Cummins only.
broadcast by
Cummins
EECU is
invalid.
5 Vehicle speed Data valid YELLOW lamp. With manual
sensor open but above transmission.
circuit normal
operational
range
6 Vehicle speed Data valid
sensor but below
shorted to normal
ground operational
range
PID 86 14 Cruise Timeout on YELLOW lamp. With VORAD.
Control Set ACC1
Speed message with
Adaptive
cruise
installed.

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 VENDOR APPLICATION GUIDE V-MAC IV 07 EMISSIONS STD.

ELECTRICAL FAULTS FOR VEHICLE ECU (MID 144) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
PID 91 3 Percent Accelerator Signal Harness/ Engine will not Measure ground, supply
Accelerator pedal sensor shorted Sensor supply the lead, signal lead, cable
Pedal out of range, high or requested fuel harness.
Position position faulty increase.
higher than harness/ YELLOW lamp.
expected. sensor
4 Accelerator Signal Harness/ Engine will not Measure ground, supply
pedal sensor shorted Sensor supply the lead, signal lead, cable
out of range, low or requested fuel harness.
lower than faulty increase.
expected or harness/ YELLOW lamp.
open circuit. sensor
5 IVS shorted Faulty Harness/ Engine will not Measure ground, supply
high with sensor Sensor supply the lead, signal lead, cable
pedal position requested fuel harness.
at idle. increase.
YELLOW lamp.
6 IVS shorted Faulty Harness/ Engine will not Measure ground, supply
low with pedal sensor Sensor supply the lead, signal lead, cable
position off requested fuel harness.
idle. increase.
YELLOW lamp.
13 Accelerator YELLOW lamp. Perform VCADS test for
pedal “Accelerator Pedal
calibration Calibration.”
required OR
calibrated
pedal out of
limits.
PID 191 5 Transmission Vehicle speed YELLOW lamp. With Cummins and
Output Shaft sensor open manual transmissions.
Speed circuit or
shorted to
ground.
6 Vehicle speed YELLOW lamp. With Cummins and
sensor manual transmissions.
shorted
across
sensor.

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 VENDOR APPLICATION GUIDE V-MAC IV 07 EMISSIONS STD.

ELECTRICAL FAULTS FOR VEHICLE ECU (MID 144) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
PPID 3 3 Starter Starter relay Faulty Harness Starter motor not Check the cabling from
Output output cables or activated at VECU via the Relay to
shorted to relay coil request. EMS.
battery with shorted YELLOW lamp.
VECU output
inactive. Buzzer sound.

4 Starter relay Faulty Harness/ Starter motor not Check the cabling from
output cables or Relay activated at VECU via the Relay to
shorted to relay request. EMS.
ground. YELLOW lamp.
Buzzer sound.
PPID 60 4 Idle validation Idle YELLOW lamp.
switch supply. validation
switch
supply
shorted to
ground
PPID 69 3 Buffered Buffered idle Signal Harness YELLOW lamp. Measure signal wiring
Idle validation shorted for the switch, cable
Validation switch does high. harness.
Switch not match idle
validation
switch, circuit
on pin VECU
VB17 shorted
to ground.
4 Buffered idle Signal YELLOW lamp. Measure signal wiring
validation shorted for the switch, cable
switch does low. harness.
not match idle
validation
switch, circuit
on pin VECU
VB17 shorted
to ground.
PPID 72 3 Accelerator Abnormally Supply, Harness/ Engine won't Measure signal and
Pedal high voltage Accelerator Sensor supply the ground cable for
Sensor or short circuit Pedal requested fuel accelerator pedal.
Supply to higher sensor increase; retarder Ground and supply
voltage shorted brake deactivated. cable for retarder. Cable
high. YELLOW lamp. harness.

4 Abnormally Supply, Harness/ Engine won't Measure signal and

low voltage or Accelerator Sensor supply the ground cable for
short circuit to Pedal requested fuel accelerator pedal.
ground. sensor increase; retarder Ground and supply
shorted low. brake deactivated. cable for retarder. Cable
YELLOW lamp. harness.

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 VENDOR APPLICATION GUIDE V-MAC IV 07 EMISSIONS STD.

ELECTRICAL FAULTS FOR VEHICLE ECU (MID 144) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
PPID 74 3 EECU/ Abnormally Relay Harness/ YELLOW lamp. Measure ground, cable
VECU high voltage shorted Relay harness and EMS
Supply or short circuit high or component.
Relay to higher broken.
voltage.
4 Abnormally Relay Harness/ YELLOW lamp. Measure ground, cable
low voltage or shorted Relay harness and EMS
short circuit to low or component.
ground. broken.
SID 230 7 Idle Accelerator Faulty Harness/ Engine won't Measure supply lead,
Validation pedal idle harness/ Sensor supply the signal lead, cable
Switch #1 validation connector/ requested fuel harness.
switch does sensor increase.
not match YELLOW lamp.
pedal sensor.
SID 231 2 J1939 Data General error. CAN J1939 YELLOW lamp. Fault trace J1939 data
Link Abnormal Comm. down/shorted link.
update rate. Down
SID 240 2 Program Checksum Software VECU VA17 ECU keeps Reprogram ECU or
Memory calculated at error or resetting. Vehicle change component.
startup differs faulty not drivable.
from the program YELLOW lamp.
stored one. hardware.
SID 243 7 Cruise Cruise Faulty Harness Cruise control Measure supply lead,
Control Set set/decel and Harness/ deactivated. signal lead, cable
Switch resume/accel Connector YELLOW lamp. harness and cruise
both active control component.
simultaneously.
SID 246 4 Brake Pedal Large vehicle YELLOW lamp.
Switch deceleration
without
service brake
activation.
SID 250 2 SAE Some ECU J1587 Some Fault trace J1587 data
J1708/J1587 does not down or function link, check connectors.
Data Link follow the shorted. disturbances
priority rules may happen.
on sending or
the J1708 bus
is down.
SID 253 2 Calibration Dataset has Error when VECU VA17 Dataset default Reprogram datasets.
Memory incorrect programming values used. Some
checksum. (faulty functions may be
EEPROM) deactivated.
YELLOW lamp.
12 Incorrect data
found in
dataset.

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 VENDOR APPLICATION GUIDE V-MAC IV 07 EMISSIONS STD.

ELECTRICAL FAULTS FOR VEHICLE ECU (MID 144) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
PSID 1 7 Retarder Engine brake Faulty Harness Retarder Control Measure supply lead,
Control switch harness deactivated. signal lead, cable
Switch position 2 YELLOW lamp. harness and retarder
input (PA-20) component.
active with
position 1
input (PA-21)
inactive.
PSID 8 2 Neutral circuit
faulty from
Allison
4 Neutral Neutral input YELLOW lamp.
Error shorted high
or switch
stuck closed.
PSID 9 3 Clutch Error Clutch circuit YELLOW lamp.
shorted to
battery.
4 Clutch circuit
shorted to
ground or
open.
PSID 14 9 DataMax Clock or other NO lamp.
General data missing.
Error
13 Out of
Calibration.
PSID 16 3 Power Power relay 1 YELLOW lamp.
Relay 1 output
shorted to
battery.
4 Power relay 1
output
shorted to
ground.
PSID 17 3 Power Power relay 2 YELLOW lamp.
Relay 2 output
shorted to
battery.
4 Power relay 2
output
shorted to
ground.
PSID 26 14 DataMax DataMax trip NO lamp.
Trip Log log
overflowed.
PSID 28 14 DataMax DataMax NO lamp.
GPS Log GPS log
overflowed.

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 VENDOR APPLICATION GUIDE V-MAC IV 07 EMISSIONS STD.

ELECTRICAL FAULTS FOR VEHICLE ECU (MID 144) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
PSID 34 3 Fifth Wheel Fifth wheel YELLOW lamp.
Slide slide solenoid
Solenoid circuit shorted
high to
battery.
4 Fifth wheel YELLOW lamp.
slide solenoid
circuit shorted
low to ground
or open.
PSID 200 9 J1939 Data Timeout on CAN1 J1939 down YELLOW lamp. Includes Cummins
Link, MID J1939 Comm. or shorted. engine.
128 communication down. Fault trace J1939 data
from EECU link line.
(MID 128)
PSID 205 9 SAE J1939 Incorrect CAN1 J1939 down YELLOW lamp. Fault trace J1939 data
Data Link, update rate. Comm. or shorted. link line.
MID 130 down. With automated manual
or Allison transmission.
PSID 230 4 Critical Uncontrolled Supply VECU A17 YELLOW lamp. Check connectors.
Software reset of voltage Change software.
Error software. drop or
faulty
software.
5 Software Voltage VECU A17 NO lamp. Normal after production
shutdown due supply programming.
to low voltage. interrupted.
Faulty
harness.
12 Severe error; Faulty VECU A17 YELLOW lamp. Reprogram ECU or
reset the software. change component.
software

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 VENDOR APPLICATION GUIDE V-MAC IV 07 EMISSIONS STD.

DATA LINKS SAE J1708/J1587

V-MAC IV complies with the interface definition of The SAE J1708/J1587 data link is used to
SAE J1708 and SAE J1939 “Recommended transmit sensor and engine data to other vehicle
Practice for Serial Data Communications modules including electronic dashboard displays,
Between Microcomputer Systems in Heavy Duty VECU, EMS, ICM, ABS/ATC and transmission
Vehicle Applications.” control systems. The link transmits and performs
diagnostic procedures from external
instrumentation. Changes to feature and function
SAE J1939 calibration values in the VECU, ICM and EMS are
also received across the J1708/J1587 data link.
The SAE J1939 line is a high-speed data link
which is the primary communications link The messages most commonly used in the
between the Vehicle ECU, Instrument Cluster V-MAC IV system are listed on the following
Module and the Engine Management System. pages. Please refer to the MACK J1587
The link is also used for ABS/ATC systems and application document for specific message
transmission control systems. Please refer to information.
MACK J1939 application documentation for
specific message information.
J1587 MESSAGE IDENTIFIERS

Message Identifier (MID) Description

128 Engine Management System
140 Instrument Cluster Module
144 Vehicle Electronic Control Unit

V-MAC ENGINE MANAGEMENT SYSTEM MID: 128

Transmit PID Data Frequency

Attention/Warning Indicator Lamps Status 44 XX 1 sec
Max. Road Speed Limit 74 XX 10 sec
Road Speed Limit Status 83 XX 1 sec
Road Speed 84 XX 0.1 sec
Cruise Control Status 85 XX 0.1 sec
Engine Load 92 XX 0.1 sec
Fuel Delivery Pressure 94 XX 1 sec
Water-in-Fuel Indicator 97 XX 10 sec (optional)
Engine Oil Pressure 100 XX 1 sec
Boost Pressure 102 XX 1 sec
Boost Pressure — extended 439 XX XX 1 sec
Turbocharger Speed 103 XX 1 sec (engine
running)
Intake Manifold Temperature 105 XX 1 sec
Air Inlet Pressure 106 XX 1 sec
Barometric Pressure 108 XX 10 sec
Coolant Temperature 110 XX 1 sec
Coolant Level 111 XX 10 sec
Engine Retarder % 122 XX 1 sec
Module Battery Voltage 158 XX XX On request

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 VENDOR APPLICATION GUIDE V-MAC IV 07 EMISSIONS STD.

V-MAC ENGINE MANAGEMENT SYSTEM MID: 128 (CONTINUED)

Transmit PID Data Frequency

Rated Engine Power 166 XX XX On request
Air Inlet Temperature 172 XX XX 1 sec
Fuel Temperature 174 XX XX 1 sec
Oil Temperature 175 XX XX 1 sec
Fuel Rate 183 XX XX 0.2 sec
Instantaneous Fuel Rate 184 XX XX 0.2 sec
Average Fuel Economy 185 XX XX 10 sec
Idle Engine Speed 188 XX XX On request
Rated Engine Speed 189 XX XX On request
Engine Speed 190 XX XX 0.1 sec
Multi-section Parameter 192 n a b c1…c15 Dynamic allocation
Diagnostics 194 n XX XX XX… As needed
Diag. Clear Code Resp. 196 2 XX XX As needed
Software Identification 234 n aaa [bccc…] On request
Module Serial Number 243 n 128** aaa… On request
Total Vehicle Distance 245 4 XX XX XX XX 10 sec
Relative Humidity 354 XX 10 sec
EGR Temperature 412 XX XX 1 sec
Proprietary Commands: 254
Starter Output 3 XX 1 sec
EGR Mass Flow 35 XX 1 sec
VTG Motor Effort 88 XX XX 1 sec
VTG SRA Temperature 89 XX 1 sec
Engine Protection Status 117 XX 1 sec
Lamp and Fault Status 208 XX 1 sec
Fan Activation Source 298 XX 10 sec
Sweet Spot Status 319 XX 1 sec
DataMax Information 405 XX XX 10 sec
Starter Control Messages 406 XX 1 sec
High Accuracy Fuel — PTO 464 XX XX XX XX 10 sec
High Accuracy Total Idle Fuel 465 XX XX XX XX 10 sec
High Accuracy Total Engine Hours 466 XX XX XX XX 10 sec
High Accuracy Total Idle Hours 467 XX XX XX XX 10 sec
High Accuracy Total Hours — PTO 468 XX XX XX XX 10 sec
High Accuracy Total Fuel 471 XX XX XX XX 10 sec
High Accuracy Total Fuel — Cruise Control 473 XX XX XX XX 10 sec
Total Time in Cruise Control 475 XX XX XX XX 10 sec
Number of Starter Activations 476 XX XX XX XX On request
Total Time of Starter Activation 477 XX XX XX XX On request
Number of Starter Activations in Backup Mode 478 XX XX XX XX On request
Maximum Time if Starter Activation — Backup Mode 479 XX XX On request

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 VENDOR APPLICATION GUIDE V-MAC IV 07 EMISSIONS STD.

V-MAC VEHICLE ECU MID: 144

Transmit PID Data Frequency

Ignition Switch Status 43 XX 1 sec
Attention/Warning Indicator Lamp Status 44 XX 1 sec
Parking Brake Sw Status 70 XX 1 sec
Idle Shutdown Status 71 XX 1 sec
Vehicle Speed 84 XX 0.1 sec
Cruise Control Status 85 XX 0.2 sec
Cruise Control Set Speed 86 XX 10 sec
Cruise Control High Set Limit Speed 87 XX On request
Cruise Control Low Set Limit Speed 88 XX On request
Power Take-Off Status 89 XX 1 sec
Percent Accelerator Pedal Position 91 XX 0.1 sec
PTO Engagement Control Status 150 XX XX 1 sec
Switched Battery Voltage 158 XX XX On request
Ambient Air Temperature 171 XX XX 10 sec
PTO Set Speed 187 XX XX 10 sec/one event
Multisection Parameter 192 n a b c1...c15 d Dynamic allocation
Diagnostics 194 n XX XX ... As needed
Diag. Clear Code Req. 195 nabc As needed
Diag. Clear Code Resp. 196 n XX XX As needed
Speed Sensor Calibration 228 4 XX XX XX XX On request
Software Identification 234 n aaa bbb ccc On request
Vehicle ID Number 237 17 XX XX XX ... On request
Component Identification Parameter 243 n XX XX XX ... On request
Data Link Escape 254 172 code x x x ... x As needed

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 VENDOR APPLICATION GUIDE V-MAC IV 07 EMISSIONS STD.

V-MAC INSTRUMENT CLUSTER MODULE MID: 140

Transmit PID Data Rate

Front Rear Axle Temperature 77 XX 1 sec
Rear Rear Axle Temperature 78 XX 1 sec
Washer Fluid Level 80 XX 10 sec
Fluid Level 96 XX 10 sec
Air Filter Differential Pressure 107 XX 10 sec
Switched Battery Voltage 158 XX XX On request
Ambient Air Temperature 171 XX XX 10 sec
Exhaust Temperature 173 XX XX 1 sec
Transmission Oil Temperature 177 XX XX 1 sec
Diagnostics 194 n XX XX ... As needed
Diagnostic Clear Code Request 195 nabc As needed
Diagnostic Clear Code Response 196 n XX XX As needed
Software Identification 234 n aaa bbb ccc On request
Vehicle ID Number 237 17 XX XX XX ... On request
Component Identification Parameter 243 n XX XX XX ... On request
Total Vehicle Distance 245 4 XX XX XX XX 10 sec
Clock 251 3 XX XX XX 10 sec
Date 252 3 XX XX XX 10 sec

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 VENDOR APPLICATION GUIDE V-MAC IV 07 EMISSIONS STD.

SYSTEM FUNCTIONS Engine Low Idle Adjustment

Low idle speed may be adjusted (within the range
DataMax™ Control Language (for of 550 to 700 rpm; 650 to 700 with ArvinMeritor)
Future Support) using the following procedure:

DataMax™ Control Language provides a means REQUIREMENTS FOR ADJUSTING LOW IDLE
for the user or OEM to either log certain events in
permanent memory for future retrieval and 1. There must be no active fault in the system.
analysis, or to control two relay drives for special 2. The vehicle must be stationary.
applications.
3. The parking brake must be applied.
Mack Trucks, Inc. can provide several DataMax™ 4. The accelerator must be in the idle position.
Control Language custom-defined statements for
driving these relays. These include statements 5. The Speed Control ON/OFF switch must be
for: turned on and off three times within two
seconds and end in the ON position).
앫 On-the-Fly resetting of speed control
parameters At this point, the idle speed will drop to 550 rpm,
앫 Power Take-Offs (PTO) lockouts based on and V-MAC will be ready to accept a new speed.
road speed

Most of the operating parameters available to the

Vehicle ECU are also available for relay control. If Be sure to leave the switch in the ON position.
a specific application is desired, contact a Mack
representative.
STEPS TO ADJUST LOW IDLE
Engine Brake Control 1. Increase or decrease engine speed with
speed control switches.
When equipped, the V-MAC IV system controls 2. Depress and release the clutch pedal or
the engine brake during all applications (including service brake to save new idle speed.
Cruise control). Because of this, the user can
program V-MAC to delay engine brake application
during minor overshoots (above the Cruise Max
Set Speed).
The Electronic Hand Throttle Min Set Speed must
The following requirements must be met for the be set to 500 rpm.
engine brake to operate:
앫 Accelerator pedal at 0% Low idle speed can also be programmed using a
service tool.
앫 Engine brake switch(es) turned on
앫 Engine speed above 900 rpm
앫 No fuel requested

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 VENDOR APPLICATION GUIDE V-MAC IV 07 EMISSIONS STD.

Engine Protection Warning and The V-MAC IV system can be programmed to

shut down except under certain circumstances:
Shutdown
앫 EHT control is active
V-MAC IV offers Engine Protection Warning as a 앫 A PTO is engaged
standard feature for low oil pressure, low coolant
level and high coolant temperature. Standard 앫 Variable speed control is active (EHT or
warnings are also available for transmission and PTO)
exhaust temperature when these sensors are 앫 Single speed control is active (EHT or PTO),
installed at the factory. The engine can also be and/or the engine power is greater than a
programmed to shut down based on any of these programmed threshold
sensor readings.
앫 Sleeper Mode is enabled
A warning and shutdown can also be enabled 앫 Ambient Air Temperature sensor is installed
together for high automatic transmission and Ambient Air Temperature Option and
temperature. Idle Shutdown with Sleeper Mode are
enabled
Idle Shutdown
The engine can be programmed to shut down
The California Air Resources Board (ARB)
after a predetermined interval of driver inactivity.
requires 2008 model year vehicles to be
This feature prevents excessive idling to help
equipped with engines having tamper-resistant
save fuel. After shutdown, the accessory relay
software which limits the time that the engine can
automatically turns off to conserve battery power.
idle at speeds above low idle (550–700 rpm). At
speeds above low idle, and with a PTO engaged,
Thirty seconds before the engine shuts down, the
idle time will be limited to five minutes, after which
Vehicle ECU will turn on the shutdown indicator.
the engine will revert back to low idle. Vehicles
The driver can override the shutdown and reset
equipped with a Clean Idle engine are identified
the interval by pressing the override switch, the
by a label which is affixed to the left front corner
accelerator pedal or the service brake.
of the hood on conventional models (CXU, CHU
and GU), and the lower portion of the driver's side
The idle shutdown function also has a
door on cab-over models (MRU and LEU). Please
programmable warm-up period. If the engine
refer to the Emission Control Systems for MACK
coolant temperature is below the Idle Shutdown
Class 8 Diesel Engines (MACK MP7 and MP8
Warm-Up Temperature threshold when the
Engines) manual for more information.
engine is first started, the shutdown counter will
not start until the temperature exceeds the
warm-up threshold and the warm-up period
expires.

Idle shutdown will NOT occur during a

regeneration. If the idle shutdown timer requests
a shutdown during regeneration, the engine will
not shut down until after regeneration has been
completed.

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Idle Cooldown Min-Max or All Speed Governor

Control
This feature provides a means of cooling down
the engine and turbocharger. If the idle cooldown Using a diagnostic tool, select from the two
option is enabled using VCADS software and the following governors:
system senses that the turbocharger may be hot,
the engine will not shut down when the vehicle 앫 The traditional MACK all-speed governor
stops, the parking brake is set and the key switch (uses the throttle to control engine speed)
is turned to the OFF position. This feature allows 앫 The min-max governor (uses the throttle to
the driver to lock the truck and walk away while control engine power)
still providing adequate cooldown. All switched
accessories will then turn off once the engine has
stopped. If this option is set, the engine can be ON/OFF Fan Control and Electronic
shut down immediately by cycling the key switch
or by pressing the shutdown override switch.
Viscous

The idle cooldown timer is set to 3.5 minutes as There are four modes of operation for the fan
soon as the engine load exceeds 25%, provided control output: Normal Mode, Curb-Side Mode,
that the engine has been running at least On-Road Mode and PTO Active Mode.
60 seconds. After the load drops below 25% (the
lowest trigger is 35% for 2 minutes), the timer Normal Mode — This mode uses engine coolant
begins counting down. If the key switch is turned temperature, outside air temperature and air
off before the timer expires, the engine will conditioning pressure to control the fan output.
continue to run until the timer reaches zero. The air conditioning inputs have programmable
minimum time on settings to prevent excessive
If a pyrometer is installed, the idle cooldown fan cycling.
function will use the pyrometer reading, shutting
the engine down when the temperature drops (The other two following modes basically provide
below 232°C (450°F), or after 3.5 minutes, additional control logic for an optional override
whichever comes first. feature.)

The default for this option is set at OFF from the Curb-Side Mode — Curb-Side refers to the
factory. ability to engage the fan for an unlimited time
while the truck is parked. This mode operates
when vehicle speed is below the programmable
threshold. The user can choose to override the
fan in this mode, and there is no time limit for the
The parking brake must be on for the idle
override.
cooldown function to work.
On-Road Mode — On-Road refers to the ability
to engage the fan manually for a limited time
Limp Home Capability while moving. The user can choose to override
the fan in this mode.
The “Limp Home” capability allows continued
engine operation in the event that an input sensor PTO Active Mode — PTO Active refers to
(vehicle speed, engine speed, accelerator pedal, optional fan engagement while a PTO is
or in some cases, coolant temperature sensor) engaged.
has failed. A fault will still be indicated to alert the
operator, but the engine will continue to function.
Based on the failure detected, engine power may
be limited to protect the engine.

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SYSTEM CONNECTOR PIN EMS CONNECTOR A PIN DESIGNATIONS

DESIGNATIONS PIN Number Description

EA-29 Not used

Engine Management System (EMS) EA-30 Not used

EA-31 Oil temperature signal
Connector Pin Designations
EA-32 SV injector 3 (output)

EMS CONNECTOR A PIN DESIGNATIONS EA-33 J1708/J1587B (Low)

EA-34 J1708/J1587A (High)
PIN Number Description
EA-35 Fan speed sensor (+)
EA-1 Not used
EA-36 NCV injector 6 (output)
EA-2 Not used
EA-37 Crank speed sensor (−)
EA-3 Water in fuel (WIF) valve (for future use)
EA-38 Crank speed sensor (+)
EA-4 Not used
EA-39 Fan speed sensor (−)
EA-5 Not used
EA-40 SV injector 6 (output)
EA-6 Not used
EA-41 Turbo speed sensor (+)
EA-7 V5 reference signal
EA-42 Turbo speed sensor (−)
EA-8 Not used
EA-43 Air-Humidity temp signal
EA-9 Not used
EA-44 NCV injector 5 (output)
EA-10 Not used
EA-45 CAM speed sensor (+)
EA-11 V5 reference ground
EA-46 CAM speed sensor (−)
EA-12 Needle Control Valve injector 2 (output)
EA-47 Boost temperature signal
EA-13 Not used
EA-48 SV injector 5 (output)
EA-14 Not used
EA-49 Not used
EA-15 Not used
EA-50 Aftertreatment fuel pressure sensor
EA-16 Spill valve (SV) injector 2 (output)
EA-51 Not used
EA-17 Not used
EA-52 NCV injector 4 (output)
EA-18 Not used
EA-53 Not used
EA-19 DPF differential pressure sensor
EA-54 Not used
EA-20 NCV injector 1 (output)
EA-55 Not used
EA-21 EGR differential pressure sensor
(Venturi) EA-56 SV injector 4 (output)
EA-22 Boost pressure signal EA-57 Ground (−)
EA-23 Air-Humidity pressure sensor signal EA-58 Not used
EA-24 SV injector 1 (output) EA-59 SV common 1, 2, 3 injectors
EA-25 Not used EA-60 SV common 4, 5, 6 injectors
EA-26 Electronic fan control switch EA-61 NCV common 4, 5, 6 injectors
EA-27 Not used EA-62 NCV common 1, 2, 3 injectors
EA-28 NVC injector 3 (output)

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EMS CONNECTOR B PIN DESIGNATIONS EMS CONNECTOR B PIN DESIGNATIONS

PIN Number Description PIN Number Description

EB-1 Not used EB-32 Not used
EB-2 Aftertreatment fuel shut off valve (H.S.) EB-33 Not used
EB-3 Oil level (low) EB-34 Not used
EB-4 Oil level (high) EB-35 Not used
EB-5 Not used EB-36 Not used
EB-6 Not used EB-37 Not used
EB-7 Preheat sensor 1 EB-38 Not used
EB-8 WIF switch (−) input EB-39 Not used
EB-9 EGR valve (−) EB-40 Not used
EB-10 Switched ground for WIF and coolant EB-41 Not used
level
EB-42 Not used
EB-11 Oil pressure signal
EB-43 Temp downstream (catalyst) signal
EB-12 Not used
EB-44 Temp upstream (catalyst) signal
EB-13 EGR valve (+)
EB-45 Aftertreatment inject 1 (low side)
EB-14 Preheat sensor 2
EB-46 Compressor recirculation valve (heat
EB-15 Buffer IVS + from VECU mode)
EB-16 Fuel pressure signal EB-47 Temp sensor (after DPF)
EB-17 Oil pressure, crank press, fuel press (+) EB-48 EGR temp aftercooler sensor
supply
EB-49 Electronic fan clutch (−) out
EB-18 Coolant temp, oil press, crank press,
fuel press (−) ground EB-50 Not used
EB-51 J1939 (high)
EB-19 Not used
EB-52 VTG valve and EGR J1939 CAN 2 (+)
EB-20 Not used
EB-53 Not used
EB-21 J1939 (low)
EB-22 J1939 (high) EB-54 Not used

EB-23 Coolant level warning (−) input EB-55 J1939 (low)

EB-24 Not used EB-56 VTG valve and EGR J1939 CAN 2 (−)
EB-57 Engine Management System module
EB-25 Preheat relay
(EMSM) power supply
EB-26 Not used
EB-58 EMSM ground
EB-27 Coolant temperature (−) input
EB-59 EMSM ground
EB-28 Crankcase pressure signal
EB-60 EMSM power supply
EB-29 Starter control
EB-61 EMSM ground
EB-30 PowerLeash™ brake (−) output
EB-62 Aftertreatment inject 1 (high side)
EB-31 Oil level (ground)

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Vehicle Electronic Control Unit VECU CONNECTOR B PIN DESIGNATIONS (CHU, CXU
AND GU MODELS)
(VECU) Connector Pin Designations
PIN Number Description
VECU CONNECTOR A PIN DESIGNATIONS (CHU, CXU VB-1 Power relay 1
AND GU MODELS) VB-2 Power relay 2
PIN Number Description VB-3 Interwheel lock (DCL) (for future
support)
VA-1 Set/Decel
VB-4 Fifth wheel slide
VA-2 Resume/Accel
VB-5 Output supply 4 (optional)
VA-3 Cruise ON/OFF
VB-6 Speed sensor (+)
VA-4 AC ON
VB-7 PTO 2 (DCL C Connector) (for future
VA-5 Service brake support)
VA-6 Key switch crank VB-8 Throttle pedal
VA-7 Spare VB-9 Not used
VA-8 Clutch input VB-10 Throttle pedal supply
VA-9 Neutral VB-11 Park brake
VA-10 Air suspension switch (optional) VB-12 Torque limit (not used)
VA-11 Not used VB-13 Not used
VA-12 Ground VB-14 Not used
VA-13 B+ from EMS Line VB-15 EMS relay (ground relay 34)
VA-14 Key Switch Ign VB-16 DCL 2 output PTO 4 (for future support)
VA-15 Not used VB-17 Buffered IVS 1
VA-16 Not used VB-18 DCL 1 output PTO 3 (for future support)
VA-17 DCL 2 switch PTO 4 (for future support) VB-19 Output supply 3 (TPS)
VA-18 Not used VB-20 Speed sensor (−)
VA-19 Fan clutch override VB-21 DCL 1 PTO 3 (for future support)
VA-20 Engine brake 2 VB-22 Analog ground (TPS)
VA-21 Engine brake 1 VB-23 Not used
VA-22 Not used VB-24 Not used
VA-23 IVS 1 (TPS) VB-25 Not used
VA-24 Water in Fuel VB-26 Not used
VA-25 Interwheel lock differential VB-27 Spare (not used)
VA-26 Fifth wheel slide VB-28 Starter Relay
VA-27 Remote shutdown (optional) VB-29 Not used
VA-28 Hood tilt VB-30 Idle shutdown override
VA-29 PTO 1
VA-30 DRL override

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VECU CONNECTOR C PIN DESIGNATIONS (CHU, CXU VECU CONNECTOR B PIN DESIGNATIONS (LEU
AND GU MODELS) CHASSIS)

PIN Number Description PIN Number Description

VC-1 J1587 (B) VB-1 Power relay 1
VC-2 J1587 (A) VB-2 Power relay 2
VC-3 Not used VB-3 Interwheel lock (DCL) (for future
support)
VC-4 J1939 (+)
VB-4 Fifth wheel slide (not used)
VC-5 J1939 (−)
VB-5 Output supply 4 (not used)
VB-6 Speed sensor (+) (not used)
VECU CONNECTOR A PIN DESIGNATIONS (LEU
CHASSIS) VB-7 PTO 2 (DCL C Connector) (for future
support)
PIN Number Description
VB-8 Throttle pedal
VA-1 Set/Decel
VB-9 Not used
VA-2 Resume/Accel
VB-10 Throttle pedal supply
VA-3 Cruise ON/OFF
VB-11 Park brake
VA-4 Not used
VB-12 Torque limit (not used)
VA-5 Service brake
VB-13 Right-hand operator (Allison)
VA-6 Key switch crank
VB-14 Not used
VA-7 Not used
VB-15 EMS relay (ground relay 34)
VA-8 Clutch input (not used)
VB-16 DCL 2 output PTO 4 Pin K (for future
VA-9 Neutral (not used) support)
VA-10 Air suspension switch (optional) VB-17 Buffered IVS 1
VA-11 Not used VB-18 Oil pressure switch
VA-12 Ground VB-19 Output supply 3 (TPS)
VA-13 B+ from EMS Line VB-20 Speed sensor (−) (not used)
VA-14 Key Switch Ign VB-21 DCL 1 PTO 3 (for future support)
VA-15 Not used VB-22 Analog ground (TPS)
VA-16 Not used VB-23 Not used
VA-17 DCL 2 switch PTO 4 Pin L (for future VB-24 Not used
support)
VB-25 Not used
VA-18 Not used
VB-26 Not used
VA-19 Fan clutch override (not used)
VB-27 Spare (not used)
VA-20 Engine brake 2
VB-28 Starter Relay
VA-21 Engine brake 1
VB-29 Not used
VA-22 Not used
VB-30 Not used
VA-23 IVS 1 (TPS)
VA-24 Water in Fuel
VA-25 Interwheel lock differential
VA-26 Fifth wheel slide (not used)
VA-27 Remote shutdown
VA-28 Hood tilt (not used)
VA-29 PTO 1
VA-30 DRL override (not used)

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VECU CONNECTOR C PIN DESIGNATIONS (LEU VECU CONNECTOR B PIN DESIGNATIONS (MRU
CHASSIS) CHASSIS)

PIN Number Description PIN Number Description

VC-1 J1587 (B) VB-1 Power relay 1
VC-2 J1587 (A) VB-2 Power relay 2 (not used)
VC-3 Not used VB-3 Interwheel lock (DCL) (for future
support)
VC-4 J1939 (+)
VB-4 Fifth wheel slide
VC-5 J1939 (−)
VB-5 Output supply 4 (not used)
VB-6 Speed sensor (+)
VECU CONNECTOR A PIN DESIGNATIONS (MRU
CHASSIS) VB-7 PTO 2 (DCL C Connector) (for future
support)
PIN Number Description
VB-8 Throttle pedal
VA-1 Set/Decel
VB-9 Not used
VA-2 Resume/Accel
VB-10 Throttle pedal supply
VA-3 Cruise ON/OFF
VB-11 Park brake
VA-4 AC ON
VB-12 Torque limit
VA-5 Service brake
VB-13 Right-hand operator (optional)
VA-6 Key switch crank
VB-14 Not used
VA-7 Not used
VB-15 EMS relay (ground relay 34)
VA-8 Clutch input
VB-16 DCL 2 output PTO 4 Pin K (for future
VA-9 Neutral (not used) support)
VA-10 Air suspension switch (optional) VB-17 Buffered IVS 1
VA-11 Not used VB-18 DCL 1 output PTO 3 Pin M (for future
support)
VA-12 Ground
VB-19 Output supply 3 (TPS)
VA-13 B+ from EMS Line
VB-20 Speed sensor (−)
VA-14 Key Switch Ign
VB-21 DCL 1 PTO 3 Pin B (for future support)
VA-15 Not used
VB-22 Analog ground (TPS)
VA-16 Not used
VB-23 Not used
VA-17 DCL 2 switch PTO 4 Pin L (for future
support) VB-24 Not used
VA-18 Not used VB-25 Not used
VA-19 Fan clutch override (not used) VB-26 Not used
VA-20 Engine brake 2 VB-27 Spare (not used)
VA-21 Engine brake 1 VB-28 Starter Relay
VA-22 Not used VB-29 Not used
VA-23 IVS 1 (TPS) VB-30 Not used
VA-24 Water in Fuel
VA-25 Interwheel lock differential
VA-26 Fifth wheel slide (not used)
VA-27 Remote shutdown
VA-28 Hood tilt (not used)
VA-29 PTO 1
VA-30 DRL override (not used)

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VECU CONNECTOR C PIN DESIGNATIONS ICM CONNECTOR A PIN DESIGNATIONS (CHU, CXU
(MRU CHASSIS) AND GU MODELS)

PIN Number Description PIN Number Description

VC-1 J1587 (B) IA-27 Heater mirror switch
VC-2 J1587 (A) IA-28 Venturi pre-heat; wait to start tell tale
(not used)
VC-3 Not used
IA-29 Transmission in reverse (+) input
VC-4 J1939 (+)
IA-30 Spare buzzer input low (not used)
VC-5 J1939 (−)

Instrument Cluster Module (ICM) ICM CONNECTOR B PIN DESIGNATIONS (CHU, CXU
AND GU MODELS)
Connector Pin Designations
PIN Number Description
IB-1 Sensor ground reference (to connector
ICM CONNECTOR A PIN DESIGNATIONS (CHU, CXU A12)
AND GU MODELS)
IB-2 Application air pressure sensor input
PIN Number Description
IB-3 Fuel level sensor input
IA-1 Battery (+) input and Voltmeter signal
IB-4 Exhaust pyrometer sensor (−)
IA-2 Ground (−)
IB-5 Exhaust pyrometer sensor (+)
IA-3 Ignition (Key On and Voltmeter signal)
(+) IB-6 Air suspension pressure sensor input

IA-4 Display Control Switch (DCS) SELECT IB-7 Spare digital input L1 (not used)
(+) input IB-8 Spare digital input L2 (not used)
IA-5 DCS ESCAPE (+) input IB-9 Outside temperature sensor input
IA-6 DCS UP (+) input IB-10 Front rear axle temperature sensor
IA-7 DCS DOWN (+) input IB-11 Rear rear axle temperature sensor
IA-8 Wake up from sleep (ground); not used IB-12 Transmission oil temperature sensor
IA-9 Panel lamp dimmer (+) input IB-13 Primary air pressure sensor input
IA-10 Tell tale 1 (for future use) IB-14 Secondary air pressure sensor input
IA-11 Tell tale 2 (for future use) IB-15 Spare AI R1 (resistive; not used)
IA-12 Sensor ground ref (to connector B1) IB-16 Cab temperature sensor input
IA-13 Spare AI-1 (not used) IB-17 Power supply, 5v air suspension sensor
IA-14 Spare AI-2 (not used) IB-18 Power supply, 5v application air sensor
IA-15 J1939 A-line (+) IB-19 Power supply, 5v primary air sensor
IA-16 J1939 A-line (−) IB-20 Power supply, 5v secondary air sensor
IA-17 J1708/J1587 A-line (+) IB-21 Power supply, 5v spare #3 (+) output
IA-18 J1708/J1587 B-line (−) (not used)

IA-19 Vign — iTAS only (future IB-22 Heated mirror; indicator lamp in switch
support/optional) signal out (−) output

IA-20 Low voltage disconnect (+) output IB-23 Spare digital input L7

IA-21 Spare buzzer input (high) IB-24 Spare digital input L8

IA-22 Power divider lock out (+) input IB-25 High beam (+) input

IA-23 Digital input H1 (not used) IB-26 Turn signal, left (+) input

IA-24 Spare digital input L12 (not used) IB-27 Turn signal, right (+) input

IA-25 Spare digital input H2 (not used) IB-28 Engine preheat input #2 (not used)

IA-26 Wake up from sleep (pull up to v batt) IB-29 Buffered speed output
IB-30 Buffered RPM output

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ICM CONNECTOR C PIN DESIGNATIONS (FOR CHU, Gauge Driver Module (GDM)
CXU AND GU MODELS)
Connector Pin Designations
PIN Number Description
GDM CONNECTOR A PIN DESIGNATIONS (LEU AND
IC-1 Optional second CAN link, J1939, A-line
(+) input/output MRU MODELS)

IC-2 Optional second CAN link, J1939, B-line PIN Number Description
(−) input/output GA-1 Interwheel differential lock (front)
IC-3 Brake pad 2 rear axles (+) input GA-2 Interwheel differential lock (rear)
(GuardDog)
GA-3 Not used
IC-4 Washer fluid level (−) input (GuardDog)
if equipped GA-4 Not used
IC-5 Optional second CAN link, J1939, A-line GA-5 Not used
(+) redundant (not used)
GA-6 Not used
IC-6 Brake pad 3 rear axles (+) input
GA-7 Not used
(GuardDog) not used
GA-8 Not used
IC-7 Brake pad 1 (GuardDog)
GA-9 Analog out (switch, odometer, hour
IC-8 Spare digital input L9 (not used)
meter trip reset); not used
IC-9 Optional second CAN link, J1939, B-line
(−) redundant (not used) GA-10 Not used
GA-11 Not used
IC-10 Optional tell tale input #3 (not used)
GA-12 Gauge dimmer (air pressure,
IC-11 iTAS audible alarm (−) output (future
support) illumination)

IC-12 iTAS armed (+) input (future support) GA-13 Gauge dimmer (transmission, exhaust
temp, warning lamp, speedometer,
IC-13 Air filter restriction (GuardDog) (+) input voltage, fuel level, tachometer, coolant
temp, oil pressure)
IC-14 Emergency stop lamp relay (−) output
GA-14 Odometer reset
IC-15 Optional second CAN link (J1939 A-line
+ redundant + resistor) not used GA-15 Not used
IC-16 Park brake lamp input GA-16 Not used
IC-17 Ign Switch Input (iTAS only; future GA-17 Ambient air temperature sensor
support/optional)
GA-18 Not used
IC-18 Spare digital input L3 (not used)
GA-19 Not used
IC-19 Front inter-wheel lock
GA-20 Data: gauges
IC-20 Rear inter-wheel lock
GA-21 Ground: gauges
IC-21 Spare digital input L4
GA-22 Power: gauges
IC-22 Optional second CAN link (J1939,
B-line [−] redundant [+] resistor) GA-23 Buffered tachometer
GA-24 Buffered speedometer
GA-25 J1587B
GA-26 J1587A
GA-27 J1939 low
GA-28 J1939 high
GA-29 Spare buzzer (not used)
GA-30 Spare buzzer (not used)

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GDM CONNECTOR B PIN DESIGNATIONS (LEU AND Serial Communication Port Pin
MRU MODELS)
Designations
PIN Number Description
GB-1 Right turn signal input SERIAL COMMUNICATION PORT 9-PIN DESIGNATIONS
GB-2 High beam input
PIN Letter Description
GB-3 Reverse transmission signal out
A Tool supply (−)
GB-4 Low air primary switch
B Tool supply (+)
GB-5 Low air secondary switch (not used)
C J1939 data link (+)
GB-6 Park brake (not used)
D J1939 data link (−)
GB-7 Forced neutral
E J1939 data link shield
GB-8 Right-hand operation
F J1587 data link (+)
GB-8 Power divider lockout
G J1587 data link (−)
GB-10 PTO (not used)
H Reserved for OEM use
GB-11 Washer fluid level switch
J IGN (+)
GB-12 Air filter restriction sensor
GB-13 Brakewear 1 (Front sensor)
GB-14 Brakewear 2 (Rear sensor)
GB-15 Left turn signal input
GB-16 Hour meter (not used)
GB-17 Exhaust temperature sensor
GB-18 Fuel level sensor
GB-19 Rear-rear axle temperature sensor
GB-20 Front-rear axle temperature sensor
GB-21 Transmission temperature sensor
GB-22 Ground: transmission temp, rear-rear
axle temp, front-rear axle temp, fuel
level, ambient temp sensors
GB-23 5 volt supply (not used)
GB-24 Ground: internal front and rear engaged
GB-25 5 volt supply (not used)
GB-26 Ground: low level washer fluid
GB-27 5 volt supply to exhaust temp sensor
GB-28 Ground to gauge driver module
GB-29 Ignition signal from EMS
GB-30 Battery input

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DESCRIPTION AND OPERATION

V-MAC IV Major Functions

MID/Serial
Function Inputs Backup Effect if Input Fails Line Info
Power Relay Ignition Key Switch None If switch turns off or fails, relay turns
Control off six seconds later.
Starter Input None If signal is lost, system will not reset 128/SID 39
after a shutdown by engaging the
starter — cycle power instead.
EGR Control Crank Speed Sensor Camshaft Corrects EGR flow. 128/SID 22
Position Sensor
Camshaft Position Sensor Crank Speed 128/SID 21
Sensor
Throttle Pedal Sensor None See “Fuel Control.” 144/PID 84
EGR Air Mass Flow Sensor Reduced power, fuel economy, or 128/PPID 35
performance.
EGR Air Temperature Sensor 128/PID 412
EGR Valve 128/SID 146
Engine Coolant Level Sensor None Open sensor indicates low level. 128/PID 111
Protection Harness open/short could cause
Shutdown protection/shutdown or make
protection/shutdown inactive for
coolant level.
Coolant Temperature Sensor None Protection/shutdown inactive for 128/PID 110
coolant temperature.
Oil Pressure Sensor None Protection/shutdown inactive for oil 128/PID 100
pressure.
Oil Temperature Sensor None Protection/shutdown inactive for 128/PID 175
engine oil temperature.
Exhaust Temperature Sensor None Protection/shutdown inactive for 140/PID 173
exhaust temperature.
J1939 Communications Line None Communications with engine control 128 or
lost. No engine or shutdown warning. 144/PSID
200/201
Transmission Oil None Protection/shutdown inactive for 128/PID 177
Temperature Sensor transmission oil temperature.

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MID/Serial
Function Inputs Backup Effect if Input Fails Line Info
Fuel Control Ambient Air Temperature None Fault on PC screen. White smoke after —
Sensor hot soak startup.
Coolant Temperature Sensor None Fault on PC screen. A low temperature 128/PID 110
reading will increase low idle speed.
Electronic Unit Injector None Rough running, reduced power for 128/SID 1
Solenoid* single failure. Shutdown for failure of through SID 6
all six injectors or major electrical
problem.
Camshaft Position Sensor* Crank Speed Smooth transition to backup. Correct 128/SID 21
Sensor RPM reading on service tool. If both
sensors fail, the engine stalls.
Crank Speed Sensor* Camshaft Correct RPM reading on service tool. 128/SID 22
Position Sensor If both sensors fail, the engine stalls.
Ignition Key Switch None If switch turns off or fails to open, the —
fuel turns off immediately. If switch
fails closed, the engine will not stop
with the key.
Inlet Air Temperature Sensor None Fault on PC screen. 128/PID 172
J1708/J1587 J1939 No loss in functionality. Engine will not 128/SID 250
start if both SID 250 and SID 231 are
active or if MID 128/PID 84 is active.
J1939 Communications Line J1708/J1587 Increase low idle speed to 900 rpm. 128/SID 231
(limited) 900 rpm isochronous governor. VSC
and Cruise control will not function.
Vehicle may not start if theft
deterrence is enabled.
Coolant Temperature Sensor None Shutdown occurs after the warmup 128/PPID 110
and shutdown times have expired
even if the engine has not yet reached
the warmup temperature.
J1939 Communications Line None Communication with engine control 144/SID 231
lost. No idle shutdown.
Shutdown Override Switch None Override cannot be performed. —
Throttle Position Sensor None If vehicle is not moving, shutdown will 128/PID 91
occur at proper time.
Vehicle Speed Sensor None Idle shutdown inhibited. 144/PID 84
Throttle Position Sensor* None Increase low idle speed to 900 rpm. 128/PID 91
900 rpm isochronous governor. VSC
— Signal line open, short to and Cruise control still work. All of the
ground or short to voltage
above at throttle greater than the 0%
— Reference line open or position.
grounded.
Idle Shutdown Coolant Temperature Sensor None Shutdown occurs after the warmup 128/PPID 110
(Idle shutdown and shutdown times have expired
will not occur even if the engine has not yet reached
during an active the warmup temperature.
regeneration)
J1939 Communications Line None Communication with engine control 144/SID 231
lost. No idle shutdown.
Shutdown Override Switch None Override cannot be performed. —
Throttle Position Sensor None If vehicle is not moving, shutdown will 128/PID 91
occur at proper time.
Vehicle Speed Sensor None Idle shutdown inhibited. 144/PID 84

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MID/Serial
Function Inputs Backup Effect if Input Fails Line Info
ON/OFF Fan A/C Pressure Switch None If the A/C pressure switch is open, the —
Control fan will engage because of high
refrigerated pressure. If the A/C
pressure switch is closed, the fan will
disengage if no other fan requests
exists.
Coolant Temperature Sensor None Fan will be engaged all of the time. 128/PID 110
Intake Air Temperature None Fan will be engaged all of the time. 128/PID 172
Sensor
J1939 Communications Line None Fan cannot be overriden with switch. 144/PSID 200
Override Switch None Fan cannot be manually overriden. —
12-Volt Supply None Loss of 12 volts engages the fan. —
Road Speed J1939 Communications Line None Engine speed limited to higher rpm. 144/PSID 200
Limiting Higher rpm isochronous governor.
VSC and Cruise control will not
function.
Vehicle Speed Sensor None Reduced power (customer selectable). 144/PID 84
No speedometer output.
Speed Clutch Switch None No speed control if switch is open. —
Control/Cruise Speed control will not cancel if switch
Control is closed.
J1939 Communications Line None Increase low idle speed to 900 rpm. 144/SID 231
900 rpm isochronous governor. VSC
and Cruise control will not function.
Park Brake Switch None No cruise if switch is closed. No —
VSC/SSC if switch goes from open to
closed.
PTO Switch 1 and 2 None Cannot set SSC if PTO switches are —
open. Engine speed will be limited if
closed.
Service Brake Switch None No cruise if switch is closed. No —
VSC/SSC if switch goes from open to
closed with park brake off.
Speed Control ON/OFF None Cannot set speed control. Cannot set —
SET/RESUME or resume speed control.
Throttle Position Sensor None See “Fuel Control.” —
Vehicle Speed Sensor None Speed control functions (Cruise, VSC, 144/PID 84
ESC) are canceled. Reduced power
(customer selectable).
Timing Control Ambient Air Temperature None Fault on PC screen. White smoke after 128/PID 172
hot soak startup.
Coolant Temperature Sensor None Light load timing retarded. Possible 128/PID 110
white smoke.
Camshaft Position Sensor Crank Speed Correct timing will be approximated. 128/SID 21
Sensor
Crank Speed Sensor Camshaft Correct timing will be approximated. 128/SID 22
Position Sensor
Inlet Air Temperature Sensor None Light load timing retarded. Possible 128/PID 172
white smoke.

Page 115
 VENDOR APPLICATION GUIDE V-MAC IV 07 EMISSIONS STD.

MID/Serial
Function Inputs Backup Effect if Input Fails Line Info
Turbocharger Crank Speed Sensor Camshaft Corrects sliding nozzle ring and vanes 128/SID 22
Sliding Nozzle Position Sensor position.
Ring and Vanes
Camshaft Position Sensor Crank Speed 128/SID 21
Position
Sensor
Throttle Pedal Sensor None See “Fuel Control.” —
Turbocharger Vane Position Reduced power. —
Sensor
Turbocharger Wheel Speed —
Sensor
EGR Air Mass Flow Sensor Reduced power, fuel economy, or 128/PPID 35
performance.
EGR Valve 128/SID 146

*Indicates erratic engine speed or power may occur if this input is intermittent.

Page 116
 VENDOR APPLICATION GUIDE V-MAC IV 07 EMISSIONS STD.

SPECIFICATIONS ENGINE SENSORS

Pressure or Sensor
Sensor Temperature Specifications
V-MAC IV Sensor Specifications
Boost −35°C (−31°F) 35783 ohms
Temperature
The following tables show the normal electrical −25°C (−13°F) 20076 ohms
P/N: 20524936
specifications for the V-MAC IV system sensors (if −15°C (5°F) 12078 ohms
available). −5°C (23°F) 7419 ohms
0°C (32°F) 5887 ohms
ENGINE SENSORS
5°C (41°F) 4707 ohms
Pressure or Sensor
Sensor Temperature Specifications 15°C (59°F) 3074.9 ohms
Air-Humidity 10% relative 1240 mVolts (mV) 25°C (77°F) 2062.9 ohms
(input voltage humidity (rh)
35°C (95°F) 1431.8 ohms
from 4.75 to 5.25)
20% rh 1540 mV
MACK P/N: 45°C (104°F) 100806 ohms
64MT490M 30% rh 1825 mV
55°C (131°F) 720.7 ohms
Volvo P/N: 40% rh 2090 mV
21046544 65°C (149°F) 521.9 ohms
50% rh 2350 mV
75°C (167°F) 382.89 ohms
60% rh 2605 mV
85°C (185°F) 284.37 ohms
70% rh 2860 mV
95°C (203°F) 213.67 ohms
80% rh 3125 mV
105°C (221°F) 162.35 ohms
90% rh 3370 mV
115°C (239°F) 124.05 ohms
−40°C (−40°F) 188500 ohms
125°C (257°F) 96.85 ohms
−30°C (−22°F) 11364 ohms
Camshaft 20°C (68°F) 860 ohms
−20°C (−4°F) 67801 ohms Position (Engine
Position)
−10°C (14°F) 42450 ohms
P/N: 20513343
0°C (32°F) 27278 ohms
Crank Speed 20°C (68°F) 860 ohms
10°C (50°F) 17958 ohms (Engine Speed)
20°C (68°F) 12091 ohms P/N: 20513343
30°C (86°F) 8313 ohms Coolant Level Not available at
P/N: 20900982 time of printing
40°C (104°F) 5827 ohms
50°C (122°F) 4160 ohms
60°C (140°F) 3020 ohms
70°C (158°F) 2228 ohms
80°C (176°F) 1667 ohms
90°C (194°F) 1265 ohms
Boost Pressure 7.7 psi 0.5 volts
(linear voltage
increases 58 psi 4.5 volts
between 7.7 psi
and 58 psi)
P/N: 20524936/
64M7480M

Page 117
 VENDOR APPLICATION GUIDE V-MAC IV 07 EMISSIONS STD.

ENGINE SENSORS ENGINE SENSORS

Pressure or Sensor Pressure or Sensor
Sensor Temperature Specifications Sensor Temperature Specifications
Coolant −40°C (−40°F) 45.313 ohms DPF −40°C (−40°F) 169.7 ohms
Temperature Temperature
−30°C (−22°F) 26.114 ohms 0°C (32°F) 200.5 ohms
P/N: 20513340 Sensor
−20°C (−4°F) 15.462 ohms P/N: 20451990 25°C (77°F) 219.6 ohms
−10°C (14°F) 9.397 ohms 50°C (122°F) 238.5 ohms
0°C (32°F) 5.896 ohms 100°C (212°F) 275.9 ohms
10°C (50°F) 3.792 ohms 200°C (392°F) 349.0 ohms
20°C (68°F) 2.5 ohms 300°C (572°F) 419.7 ohms
30°C (86°F) 1.707 ohms 400°C (752°F) 488.1 ohms
40°C (104°F) 1.175 ohms 500°C (932°F) 554.1 ohms
50°C (122°F) 0.798 ohms 600°C (1112°F) 617.8 ohms
60°C (140°F) 0.596 ohms 700°C (1292°F) 679.2 ohms
70°C (158°F) 0.435 ohms 800°C (1472°F) 738.2 ohms
80°C (176°F) 0.323 ohms 850°C (1562°F) 766.8 ohms
90°C (194°F) 0.243 ohms EGR Diff
Pressure (at
100°C (212°F) 0.786 ohms
–40°C to 125°C
110°C (230°F) 0.144 ohms [–40°F to 257°F]
and 5.0 volts
120°C (248°F) 0.113 ohms input)
130°C (266°F) 0.089 ohms P/N: 20930137
140°C (284°F) 0.071 ohms EGR Temp
Crankcase 5.9 pressure per 0.5 volts Aftercooler (at
–40°C to 100°C
Pressure (at square inch
[–40°F to 212°F]
25°C [77°F] and absolute (psia)
5.0 volts input) and 5.0 volts
20.3 psia 4.5 volts input)
P/N: 20796744
P/N: 21010707
DPF Diff Input pressure
Pressure range: Fuel Pressure 0 psi 0.5 volts
Sensor (at 25°C [77°F]
0 to 35 kPa diff and 5.0 volts 101.5 psi 4.5 volts
P/N: 20451992 pressure input)
Proof pressure: P/N: 20898038
100 kPaD Max
NOx Sensor
Burst pressure:
P/N: 21069361
high side
(300 kPaD Max) Oil Pressure (at 0 pressure per 0.5 volts
25°C [77°F] and square inch
low side 5.0 volts input) gauge (psig)
(200 kPaD Max)
P/N: 20484678 101.5 psig 4.5 volts
Oil Level
P/N: 24424110
Maximum −20°C (−4°F) 155.7 mVolts
[(±) 30]
Minimum −20°C (−4°F) 1009.1 mVolts
[(±) 50]
No Oil −20°C (−4°F) 1130.2 mVolts
[(±) 56]

Page 118
 VENDOR APPLICATION GUIDE V-MAC IV 07 EMISSIONS STD.

ENGINE SENSORS INSTRUMENT CLUSTER SENSORS

Pressure or Sensor Pressure or Sensor
Sensor Temperature Specifications Sensor Temperature Specifications
Oil Temperature 25°C (77°F) 1520 ohms Air Suspension 0 pressure per 0.5 volts
P/N: 24424110 Pressure square inch
60°C (140°F) 377.9 ohms
(At 25°C and gauge (psig)
90°C (194°F) 139.7 ohms 5.0 volts input; 174 psig 4.5 volts
100°C (212°F) 103.6 ohms linear voltage
increase between
120°C (248°F) 59.6 ohms 0 psi and 174 psi)
130°C (266°F) 46.1 ohms P/N: 64MT373
Turbocharger Ambient Air −20°C (−4°F) 10047.1 ohms
Speed P/N: 64MT2118M 0°C (32°F) 3280.7 ohms
(measured
between pins 1 20°C (68°F) 1231.7 ohms
and 2. Pin 3 is the
40°C (104°F) 524 ohms
shield wire)
P/N: 24426713 Exhaust Range: −40°C to
Temperature 1000°C (−40°F to
Nominal 25°C (77°F) 600 ohms Pyrometer 1832°F)
Maximum 25°C (77°F) 1000 ohms P/N: 64MT377M
Water in Fuel Power draw: 5 to Front Drive Axle 0°C (32°F) 6100 ohms
P/N: 20771580 10 mA Temperature
30°C (86°F) 1730 ohms
P/N:
64MT2113AM 60°C (140°F) 599 ohms

VEHICLE SENSORS 100°C (212°F) 184.7 ohms

Pressure or Sensor 120°C (248°F) 111.3 ohms

Sensor Temperature Specifications 140°C (284°F) 70.1 ohms
Throttle Position 9 to 12% Vref at Fuel Level Empty Tank 260 ohms [(±) 6]
(Vref [Supply closed throttle P/N: 16MB48D Half Tank 138 ohms [(±) 6]
Voltage] = 5.0 61 to 69% Vref at
VDC =/− 0.3; Vref full pedal travel Full Tank 33 ohms [(±) 4]
increase is linear
Interior Cab Air −20°C (−4°F) 9776 ohms
between closed
throttle and full P/N: 64MT391M 0°C (32°F) 3279 ohms
pedal travel)
20°C (68°F) 1252 ohms
P/N: 4QB414
40°C (104°F) 528 ohms
Vehicle Speed 20°C (68°F) 163 ohms
Primary and 0 pressure per 0.5 volts
P/N: 64MT439M
Secondary Air square inch
Pressure gauge (psig)
(At 25°C and 174 psig 4.5 volts
INSTRUMENT CLUSTER SENSORS 5.0 volts input;
Pressure or Sensor linear voltage
Sensor Temperature Specifications increase between
0 psi and 174 psi)
Air Application 0 pressure per 0.5 volts
P/N: 64MT373
Pressure square inch
(At 25°C and gauge (psig) Rear Drive Axle 0°C (32°F) 6100 ohms
5.0 volts input; 174 psig 4.5 volts Temperature
30°C (86°F) 1730 ohms
linear voltage P/N:
increase between 64MT2113AM 60°C (140°F) 599 ohms
0 psi and 174 psi)
100°C (212°F) 184.7 ohms
P/N: 64MT373
120°C (248°F) 111.3 ohms
140°C (284°F) 70.1 ohms

Page 119
 VENDOR APPLICATION GUIDE V-MAC IV 07 EMISSIONS STD.

INSTRUMENT CLUSTER SENSORS BODY BUILDER INTERFACE CONNECTOR 2

Pressure or Sensor Circuit Wiring
Sensor Temperature Specifications Cavity Wire ID Description Diagram ID
Transmission 0°C (32°F) 6100 ohms 13 4C6-2.0 Left Hand Turn BBIC2:13
Oil Temperature Signal
30°C (86°F) 1730 ohms
P/N: 14 4D6-2.0 Right Hand Turn BBIC2:14
64MT2113AM 60°C (140°F) 599 ohms
Signal
100°C (212°F) 184.7 ohms
15 BB2-1.0 Spare Pass BBIC2:15
120°C (248°F) 111.3 ohms Through 2
140°C (284°F) 70.1 ohms 16 BB3-1.0 Spare Pass BBIC2:16
Through 3
17 BB4-1.0 Spare Pass BBIC2:17
BODY BUILDER INTERFACE Through 4
V-MAC IV Body Link 18 17C2-1.0 Speed Control BBIC2:18
Decrement
BODY BUILDER INTERFACE CONNECTOR 1 19 BB5-1.0 Spare Pass BBIC2:19
Through 5
Wiring
Cavity Wire ID Description Diagram ID 20 17D2-1.0 Speed Control BBIC2:20
Increment
R —
21 5D2-1.0 Right Hand BBIC2:21
S 48A-5.0 Battery 1 BBIC1:S Turn/Stop Lamp
T — 22 5E2-1.0 Left Hand BBIC2:22
U 70B-5.0 Ignition 1 BBIC1:U Turn/Stop Lamp
V 33B-3.0 Stop Lamps BBIC1:V 23 HB29B-0.8 Buffered Vehicle BBIC2:23
MPH
W 34B-3.0 Reverse Power BBIC1:W
24 —
X 37B-3.0 Tail Lamps BBIC1:X
25 1587HN8-0.8 J1587A (+)* BBIC2:25
Y 35B-3.0 Clearance Lamps BBIC1:Y
26 1587LN8-0.8 J1587B (–)* BBIC2:26
Z 34C-3.0 Neutral Power BBIC1:Z
27 64A1-1.0 Body Indicator BBIC2:27
Lamp (+)
BODY BUILDER INTERFACE CONNECTOR 2 28 BB6-1.0 Spare Pass BBIC2:28
Through 6
Circuit Wiring
Cavity Wire ID Description Diagram ID 29 64B1-1.0 Body Indicator BBIC2:29
Lamp (−)
1 30B-2.0 Aux. SW. Ignition BBIC2:1
*Twisted Pair
2 61B-2.0 Aux. SW. Battery BBIC2:2
3 42B-2.0 Reverse Signal BBIC2:3
4 —
5 CB7A-1.0 PTO 2 BBIC2:5
6 17M-1.0 PTO 1 BBIC2:6
7 17E2-1.0 Speed Control BBIC2:7
ON/OFF
8 HB30B-0.8 Buffered Engine BBIC2:8
RPM
9 BB1-2.0 Spare Pass BBIC2:9
Through 1
10 —
11 —
12 —

Page 120
 VENDOR APPLICATION GUIDE V-MAC IV 07 EMISSIONS STD.

BODY BUILDER CAB INTERFACE CONNECTOR BODY LINK CONNECTOR KIT 204SX420 (1 KIT PER
CHASSIS)
Wiring
Cavity Wire ID Description Diagram ID Qty. Part Number Description
1 30B-2.0 Aux. SW. Ignition BB_CAB:1 1 598AX245 9 Pin Connector
2 61B-2.0 Aux. SW. Battery BB_CAB:2 1 598AX236 29 Pin Connector
3 70B-3.0 Ignition 1 BB_CAB:3 1 980AX44 Size 4 Socket for 13.0 mm²
wire
4 48A-3.0 Battery 1 BB_CAB:4
2 960AX46 Size 8 Socket for 8.0–5.0 mm²
5 CB7A-1.0 PTO 2 BB_CAB:5 wire
6 17M1-1.0 PTO 1 BB_CAB:6 1 980AX71 Size 12 Socket for 5.0 mm²
7 17E2-1.0 Speed Control BB_CAB:7 wire
ON/OFF
9 980AX18 Size 8 Socket for 8.0–5.0 mm²
8 HB30B-0.8 Buffered Engine BB_CAB:8 wire
RPM 14 980AX20 Size 16 Socket for
9 BB1-2.0 Spare Pass BB_CAB:9 1.0–0.5 mm² wire
Through 1
2 980AX49 Size 16 Socket for
10 — 2.0–1.0 mm² wire
11 — 5 980AX54 Size 20 Socket for
1.0–0.5 mm² wire
12 —
1 980AX200 Size 4 Plug
13 —
2 980AX201 Size 8 Plug
14 BB2-1.0 Spare Pass BB_CAB:14
Through 2 29 980AX202 Size 12 and 16 Plug
15 BB3-1.0 Spare Pass BB_CAB:15 6 969AM9 Size 20 Plug
Through 3
16 BB4-1.0 Spare Pass BB_CAB:16
Through 4
17 BB5-1.0 Spare Pass BB_CAB:17
Through 5
18 17C2-1.0 Speed Control BB_CAB:18
Decrement
19 —
20 17D2-1.0 Speed Control BB_CAB:20
Increment
21 5D2-1.0 Right Hand BB_CAB:21
Turn/Stop
22 5E2-1.0 Left Hand BB_CAB:22
Turn/Stop
23 HB29B-0.8 Buffered Vehicle BB_CAB:23
MPH
24 —
25 1587HN8-0.8 J1587A (+)* BB_CAB:25
26 1578LN8-0.8 J1587B (–)* BB_CAB:26
27 —
28 BB6-1.0 Spare Pass BB_CAB:28
Through 6
29 —
*Twisted Pair

Page 121
 VENDOR APPLICATION GUIDE V-MAC IV 07 EMISSIONS STD.

29

Figure 29 — Harness Connector 1 Chassis (598AX244)

BODY BUILDER CONNECTOR 1

Qty. Part Number Description
2 980AX45 Terminal (8.0–5.0) (8)
5 980AX17 Terminal (3.0–2.0) (12)
1 980AX200 Plug Seal (4)
1 980AX202 Plug Seal (12)

30

Figure 30 — Harness Connector 2 Chassis (598AX236)

BODY BUILDER CONNECTOR 2

Qty. Part Number Description
4 980AX60 Terminal (1.0–2.0) (12)
1 980AX49 Terminal (1.0–2.0) (16)
13 980AX48 Terminal (0.8–1.0) (16)
3 980AX54 Terminal (0.8–1.0) (20)
5 980AX202 Plug Seal (12/16)
3 969AM9 Plug Seal (20)

Page 122
INDEX

INDEX

Page 123
 INDEX
A ENGINE PROTECTION WARNING AND
SHUTDOWN . . . . . . . . . . . . . . . . . . . . . . . . . . 103
A/C PRESSURE SWITCH (OPTIONAL). . . . . . . . . 49
EXHAUST GAS RECIRCULATION (EGR)
ADVISORY LABELS . . . . . . . . . . . . . . . . . . . . . . . . . 2
DIFFERENTIAL PRESSURE SENSOR . . . . . . . 37
AFTERTREATMENT FUEL INJECTOR
EXHAUST GAS RECIRCULATION (EGR) VALVE
PRESSURE SENSOR. . . . . . . . . . . . . . . . . . . . 34
OUTPUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
AIR BRAKE APPLICATION SENSOR . . . . . . . . . . 43
EXHAUST TEMPERATURE (PYROMETER)
AIR SUSPENSION PRESSURE SENSOR. . . . 43, 47
SENSOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
AIR-HUMIDITY SENSOR . . . . . . . . . . . . . . . . . . . . 34
AMBIENT AIR TEMPERATURE SENSOR . . . . 43, 47
AUTOMATED TRANSMISSIONS . . . . . . . . . . . . . . 45
F
AUTOMATIC TRANSMISSIONS . . . . . . . . . . . . . . 45 FAN CLUTCH OUTPUT. . . . . . . . . . . . . . . . . . . . . . 53
FAN CLUTCH OVERRIDE SWITCH
B (OPTIONAL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
BOOST PRESSURE-TEMPERATURE FRONT DRIVE AXLE TEMPERATURE
SENSOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
SENSORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
FUEL LEVEL SENSOR . . . . . . . . . . . . . . . . . . . 44, 47
BUFFERED MPH OUTPUT . . . . . . . . . . . . . . . . . . 52
FUEL PRESSURE SENSOR . . . . . . . . . . . . . . . . . . 38
BUFFERED RPM OUTPUT . . . . . . . . . . . . . . . . . . 52
FUEL SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
C
G
CAMSHAFT POSITION (ENGINE POSITION)
GAUGE DRIVER MODULE (GDM) . . . . . . . . . . . . . . 7
SENSOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
GAUGE DRIVER MODULE (GDM) CONNECTOR
CLUTCH SWITCH. . . . . . . . . . . . . . . . . . . . . . . . . . 49
PIN DESIGNATIONS . . . . . . . . . . . . . . . . . . . . 111
COOLANT LEVEL SENSOR. . . . . . . . . . . . . . . . . . 36
GAUGE DRIVER MODULE SENSORS. . . . . . . . . . 47
COOLANT TEMPERATURE SENSOR. . . . . . . . . . 36
GENERAL SWITCH INFORMATION. . . . . . . . . . . . 48
CRANK SPEED (ENGINE SPEED) SENSOR . . . . 35
CRANKCASE PRESSURE SENSOR . . . . . . . . . . . 36
I
D IDLE COOLDOWN. . . . . . . . . . . . . . . . . . . . . . . . . 104
DATA LINKS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98 IDLE SHUTDOWN . . . . . . . . . . . . . . . . . . . . . . . . . 103
DATAMAX™ CONTROL LANGUAGE (FOR IDLE SHUTDOWN OVERRIDE SWITCH
FUTURE SUPPORT). . . . . . . . . . . . . . . . . . . . 102 (OPTIONAL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
DAYTIME RUNNING LIGHTS (DRL) OVERRIDE INSTRUMENT CLUSTER MODULE (ICM) . . . . . . . . 6
SWITCH (OPTIONAL) . . . . . . . . . . . . . . . . . . . . 49 INSTRUMENT CLUSTER MODULE (ICM)
DESCRIPTION AND OPERATION . . . . . . . . . . . . 113 CONNECTOR PIN DESIGNATIONS . . . . . . . . 110
DIAGNOSTICS AND FAULT CODES. . . . . . . . . . . 55 INSTRUMENT CLUSTER MODULE
DIESEL PARTICULATE FILTER (DPF) SENSORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
DIFFERENTIAL PRESSURE SENSOR . . . . . . 37 INTERIOR CAB TEMPERATURE SENSOR . . . . . . 44
DPF SMART SWITCH . . . . . . . . . . . . . . . . . . . . . . 49 INTRODUCTION AND PURPOSE. . . . . . . . . . . . . . . 4
DPF TEMPERATURE SENSORS (PRE CAT,
POST CAT, POST DPF) . . . . . . . . . . . . . . . . . . 37
K
KEY SWITCH (REQUIRED). . . . . . . . . . . . . . . . . . . 50
E
EGR TEMPERATURE AFTERCOOLER
L
SENSOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 LIMP HOME CAPABILITY . . . . . . . . . . . . . . . . . . . 104
ENGINE BRAKE CONTROL. . . . . . . . . . . . . . . . . 102
ENGINE BRAKE LOW AND HIGH SWITCH
M
(OPTIONAL) . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 MANUAL TRANSMISSIONS . . . . . . . . . . . . . . . . . . 45
ENGINE BRAKE OUTPUTS . . . . . . . . . . . . . . . . . . 52 MIN-MAX OR ALL SPEED GOVERNOR
ENGINE LOW IDLE ADJUSTMENT . . . . . . . . . . . 102 CONTROL . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
ENGINE MANAGEMENT SYSTEM (EMS). . . . . . . . 6 MODULE ENVIRONMENTAL AND ELECTRICAL
ENGINE MANAGEMENT SYSTEM (EMS) REQUIREMENTS. . . . . . . . . . . . . . . . . . . . . . . . . 6
CONNECTOR PIN DESIGNATIONS . . . . . . . 105
ENGINE MANAGEMENT SYSTEM N
SENSORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 NOX SENSOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Page 124
 INDEX
O SPEED CONTROL ON/OFF SWITCH . . . . . . . . . . 51
SYSTEM CONNECTOR PIN
OIL LEVEL-TEMPERATURE SENSOR . . . . . . . . . .39
DESIGNATIONS . . . . . . . . . . . . . . . . . . . . . . . 105
OIL PRESSURE SENSOR . . . . . . . . . . . . . . . . . . . .39
SYSTEM CONNECTORS . . . . . . . . . . . . . . . . . . . . . 7
ON/OFF FAN CONTROL AND ELECTRONIC
SYSTEM FUNCTIONS . . . . . . . . . . . . . . . . . . . . . 102
VISCOUS . . . . . . . . . . . . . . . . . . . . . . . . . . . . .104
SYSTEM INPUT SWITCHES . . . . . . . . . . . . . . . . . 48
P SYSTEM OUTPUTS . . . . . . . . . . . . . . . . . . . . . . . . 52
SYSTEM OVERVIEW . . . . . . . . . . . . . . . . . . . . . . . . 6
POWER AND GROUND CONNECTIONS . . . . . . . . .7
POWER RELAY DRIVER . . . . . . . . . . . . . . . . . . . . .53 T
POWER TAKE-OFF (PTO) 1 AND PTO 2
SWITCHES (OPTIONAL) . . . . . . . . . . . . . . . . . .50 THROTTLE (ACCELERATOR) POSITION
PRIMARY AND SECONDARY AIR PRESSURE SENSOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
SENSOR . . . . . . . . . . . . . . . . . . . . . . . . . . . .44, 47 TRANSMISSION OIL TEMPERATURE
SENSOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
R TURBOCHARGER SPEED SENSOR. . . . . . . . . . . 40
REAR DRIVE AXLE TEMPERATURE U
SENSOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44
UNIT INJECTOR OUTPUTS . . . . . . . . . . . . . . . . . . 54
S V
SAE J1708/J1587 . . . . . . . . . . . . . . . . . . . . . . . . . . .98
SAE J1939 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .98 VEHICLE ELECTRONIC CONTROL SENSORS . . 41
SAFETY INFORMATION . . . . . . . . . . . . . . . . . . . . . .2 VEHICLE ELECTRONIC CONTROL
SENSOR REQUIREMENTS. . . . . . . . . . . . . . . . . . .46 UNIT (VECU) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
SERIAL COMMUNICATION PORT PIN VEHICLE ELECTRONIC CONTROL
DESIGNATIONS . . . . . . . . . . . . . . . . . . . . . . . .112 UNIT (VECU) CONNECTOR PIN
SERVICE BRAKE AND PARKING BRAKE DESIGNATIONS . . . . . . . . . . . . . . . . . . . . . . . 107
SWITCHES . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50 VEHICLE SPEED (ROAD SPEED) SENSOR . . . . . 42
SERVICE PROCEDURES AND TOOL V-MAC IV ELECTRONIC CONTROL UNITS . . . . . . 6
USAGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 V-MAC IV MAJOR FUNCTIONS . . . . . . . . . . . . . . 113
SET/RESUME SWITCH (OPTIONAL) . . . . . . . . . . .51 V-MAC IV SENSOR SPECIFICATIONS . . . . . . . . 117
SPARE 1 OR PTO 3 (VECU PIN VB-21) AND
SPARE 2 OR PTO 4 (VECU PIN VA-17) INPUTS
W
(OPTIONAL) . . . . . . . . . . . . . . . . . . . . . . . . . . . .51 WATER IN FUEL FILTER SENSOR . . . . . . . . . . . . 40
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . .117

Page 125
 NOTES

Page 126
 VENDOR
APPLICATION GUIDE
(V-MAC IV) ®

2007 EMISSIONS STD.

PRINTED IN U.S.A.
8-372 © MACK TRUCKS, INC. 2008
 VENDOR
APPLICATION GUIDE
(V-MAC IV)
®

2007 EMISSIONS STD.

OCTOBER 2008
(REVISED)
8-372
 VENDOR APPLICATION GUIDE
(V-MAC IV) 2007
EMISSIONS STD.




OCTOBER 2008 © MACK TRUCKS, INC. 2008

(REVISED — SUPERSEDES ISSUE DATED JULY 2007) 8-372
 ATTENTION
The information in this manual is not all inclusive and cannot take into
account all unique situations. Note that some illustrations are typical and
may not reflect the exact arrangement of every component installed on a
specific chassis.

The information, specifications, and illustrations in this publication are

based on information that was current at the time of publication.

No part of this publication may be reproduced, stored in a retrieval

system, or be transmitted in any form by any means including (but not
limited to) electronic, mechanical, photocopying, recording, or otherwise
without prior written permission of Mack Trucks, Inc.

Page ii
TABLE OF CONTENTS

TABLE OF CONTENTS

Page iii
 TABLE OF CONTENTS
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
SAFETY INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Advisory Labels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Service Procedures and Tool Usage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
INTRODUCTION AND PURPOSE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
VENDOR APPLICATION GUIDE V-MAC IV 07 EMISSIONS STD. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
SYSTEM OVERVIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
V-MAC IV Electronic Control Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Fuel System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
MODULE ENVIRONMENTAL AND ELECTRICAL REQUIREMENTS . . . . . . . . . . . . . . . . . . . . . . . 6
Engine Management System (EMS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Vehicle Electronic Control Unit (VECU) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Instrument Cluster Module (ICM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Gauge Driver Module (GDM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Power and Ground Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
System Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
ENGINE MANAGEMENT SYSTEM SENSORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Aftertreatment Fuel Injector Pressure Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Air-Humidity Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Boost Pressure-Temperature Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Camshaft Position (Engine Position) Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Crank Speed (Engine Speed) Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Coolant Level Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Coolant Temperature Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Crankcase Pressure Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Diesel Particulate Filter (DPF) Differential Pressure Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
DPF Temperature Sensors (Pre CAT, Post CAT, Post DPF) . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Exhaust Gas Recirculation (EGR) Differential Pressure Sensor . . . . . . . . . . . . . . . . . . . . . . . . 37
EGR Temperature Aftercooler Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Fuel Pressure Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
NOx Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Oil Pressure Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Oil Level-Temperature Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Turbocharger Speed Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Water in Fuel Filter Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
VEHICLE ELECTRONIC CONTROL SENSORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Throttle (Accelerator) Position Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Vehicle Speed (Road Speed) Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
INSTRUMENT CLUSTER MODULE SENSORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Air Brake Application Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Air Suspension Pressure Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Ambient Air Temperature Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Front Drive Axle Temperature Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Fuel Level Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Interior Cab Temperature Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Rear Drive Axle Temperature Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Primary and Secondary Air Pressure Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Transmission Oil Temperature Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Automatic Transmissions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Automated Transmissions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Manual Transmissions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Page iv
 TABLE OF CONTENTS
SENSOR REQUIREMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
GAUGE DRIVER MODULE SENSORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Air Suspension Pressure Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Ambient Air Temperature Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Exhaust Temperature (Pyrometer) Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Fuel Level Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Primary and Secondary Air Pressure Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
SYSTEM INPUT SWITCHES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
General Switch Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
A/C Pressure Switch (Optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Clutch Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Daytime Running Lights (DRL) Override Switch (Optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
DPF Smart Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Engine Brake Low and High Switch (Optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Fan Clutch Override Switch (Optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Idle Shutdown Override Switch (Optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Key Switch (Required) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Power Take-Off (PTO) 1 and PTO 2 Switches (Optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Service Brake and Parking Brake Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Set/Resume Switch (Optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Spare 1 or PTO 3 (VECU pin VB-21) and Spare 2 or PTO 4 (VECU pin VA-17) Inputs
(Optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Speed Control ON/OFF Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
SYSTEM OUTPUTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Buffered MPH Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Buffered RPM Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Engine Brake Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Exhaust Gas Recirculation (EGR) Valve Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Fan Clutch Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Power Relay Driver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Unit Injector Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
DIAGNOSTICS AND FAULT CODES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
DATA LINKS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
SAE J1939 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
SAE J1708/J1587 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
SYSTEM FUNCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
DataMax™ Control Language (for Future Support) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
Engine Brake Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
Engine Low Idle Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
Engine Protection Warning and Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
Idle Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
Idle Cooldown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
Limp Home Capability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
Min-Max or All Speed Governor Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
ON/OFF Fan Control and Electronic Viscous . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
SYSTEM CONNECTOR PIN DESIGNATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
Engine Management System (EMS) Connector Pin Designations . . . . . . . . . . . . . . . . . . . . . 105
Vehicle Electronic Control Unit (VECU) Connector Pin Designations . . . . . . . . . . . . . . . . . . . 107
Instrument Cluster Module (ICM) Connector Pin Designations . . . . . . . . . . . . . . . . . . . . . . . . 110
Gauge Driver Module (GDM) Connector Pin Designations . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
Serial Communication Port Pin Designations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112

Page v
 TABLE OF CONTENTS
DESCRIPTION AND OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
V-MAC IV Major Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
V-MAC IV Sensor Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
INDEX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123

Page vi
INTRODUCTION

INTRODUCTION

Page 1
 INTRODUCTION
SAFETY INFORMATION

Advisory Labels
Cautionary signal words (Danger-Warning-Caution) may appear in various locations throughout this
manual. Information accented by one of these signal words must be observed to minimize the risk of
personal injury to service personnel, or the possibility of improper service methods which may damage
the vehicle or cause it to be unsafe. Additional Notes and Service Hints are used to emphasize areas of
procedural importance and provide suggestions for ease of repair. The following definitions indicate the
use of these advisory labels as they appear throughout the manual:

Danger indicates an unsafe practice that could result in death or serious

personal injury. Serious personal injury is considered to be permanent injury
from which full recovery is NOT expected, resulting in a change in life style.

Warning indicates an unsafe practice that could result in personal injury.

Personal injury means that the injury is of a temporary nature and that full
recovery is expected.

Caution indicates an unsafe practice that could result in damage to the product.

Note indicates a procedure, practice, or condition that must be followed in order for
the vehicle or component to function in the manner intended.

A helpful suggestion that will make it quicker and/or easier to perform a procedure,
while possibly reducing service cost.

Page 2
 INTRODUCTION
Service Procedures and Tool Usage
Anyone using a service procedure or tool not recommended in this manual must first satisfy himself
thoroughly that neither his safety nor vehicle safety will be jeopardized by the service method he selects.
Individuals deviating in any manner from the instructions provided assume all risks of consequential
personal injury or damage to equipment involved.

Also note that particular service procedures may require the use of a special tool(s) designed for a
specific purpose. These special tools must be used in the manner described, whenever specified in the
instructions.

1. Before starting a vehicle, always be seated in the driver's seat, place the
transmission in neutral, apply the parking brakes, and push in the clutch
pedal. Failure to follow these instructions could produce unexpected
vehicle movement, which can result in serious personal injury or death.
2. Before working on a vehicle, place the transmission in neutral, set the
parking brakes, and block the wheels. Failure to follow these instructions
could produce unexpected vehicle movement, which can result in serious
personal injury or death.

Engine-driven components such as Power Take-Off (PTO) units, fans and fan
belts, driveshafts and other related rotating assemblies, can be very
dangerous. Do not work on or service engine-driven components unless the
engine is shut down. Always keep body parts and loose clothing out of range
of these powerful components to prevent serious personal injury. Be aware of
PTO engagement or nonengagement status. Always disengage the PTO when
not in use.

Do not work under a vehicle that is supported only by a hydraulic jack. The
hydraulic jack could fail suddenly and unexpectedly, resulting in severe
personal injury or death. Always use jackstands of adequate capacity to
support the weight of the vehicle.

Before towing the vehicle, place the transmission in neutral and lift the rear wheels
off the ground, or disconnect the driveline to avoid damage to the transmission
during towing.

REMEMBER,
SAFETY . . . IS NO ACCIDENT!

Page 3
 INTRODUCTION
INTRODUCTION AND
PURPOSE
Electronic engine controls can be used to
improve engine performance while reducing
emissions and fuel consumption. Mack Trucks,
Inc. has developed a new Vehicle Management
and Control System (V-MAC® IV), which is
standard on all MP7 and MP8 engines.

The purpose of this manual is to provide a guide

for interfacing with V-MAC IV electronics. This
manual is intended for Original Equipment
Manufacturers (OEMs) and aftermarket body
builders. Although every effort has been made to
ensure that all information is as accurate as
possible, some information may change without
notice.

Please note that this manual contains information

for MP7 and MP8 engines that meets U.S. 2007
Emission Standards. For MP7 engines that meet
U.S. 2004 Emissions Standards please refer to
the Vendor Application Guide (V-MAC® IV) 2004
Emission Standards, 8-359.

Page 4
 VENDOR APPLICATION GUIDE V-MAC IV 07 EMISSIONS STD.

VENDOR APPLICATION GUIDE V-MAC IV 07

EMISSIONS STD.

Page 5
 VENDOR APPLICATION GUIDE V-MAC IV 07 EMISSIONS STD.

SYSTEM OVERVIEW MODULE ENVIRONMENTAL

AND ELECTRICAL
V-MAC IV Electronic Control Units REQUIREMENTS
The V-MAC IV system consists of four major
electronic control units:
The V-MAC IV electronic control units (VECU,
Engine Management System (EMS) — Handles EMS, ICM, and GDM) should not be mounted in
fuel control, fan control, timing and engine sensor an area that will be used for storage because this
information. could reduce the heat dissipation from the units.

Vehicle Electronic Control Unit (VECU) —

Handles engine brake control, speed control, Each control unit should be mounted in an area
theft deterrence, idle shutdowns, and data that allows the following environmental
logging. requirements to be met during normal operation.

Instrument Cluster Module (ICM) — (not Engine Management System (EMS)

available for LEU and MRU model trucks) The
V-MAC IV Instrument Cluster (ICM) is a 앫 Operating Temperature: −40°C (−40°F) to
one-piece unit composed of gauges and an + 90°C (194°F)
information display. Information is displayed when
required or requested via a stalk switch. 앫 Humidity: 0% to 100% RH
앫 Mechanical Vibration: 1 to 300 Hz <5g; 300
Some of the information displayed by the ICM to 1000 Hz <10g; 1000 to 1800 Hz <25g
includes air brake application, air suspension,
axle oil temperature, exhaust temperature,
interior and outside temperature, primary and
secondary air pressure, transmission oil The only acceptable EMS mounting systems are
temperature, and vehicle speed. those already supplied by Mack Trucks, Inc. Any
substitute mounting arrangements for the EMS,
Gauge Driver Module (GDM) — The V-MAC IV other than the arrangement supplied from the
Gauge Driver Module (GDM) is a black box factory, must be approved by Mack Trucks, Inc.
controller used in LEU and MRU model chassis.
The GDM contains a warning light bar, an hour
meter located in the tachometer and an odometer
located in the speedometer. A separate push Vehicle Electronic Control Unit
button is available to toggle through different (VECU)
functions such as to retrieve fault codes and view
trip information. 앫 Operating Temperature: −40°C (−40°F) to
+70°C (158°F)
The EMS, VECU and ICM provide diagnostic fault
앫 Humidity: 5% to 95% RH
logging (accessible via a service tool), customer
programming and programming audit trails that 앫 Mechanical Vibration: 1 to 1000 Hz <5g
detail when and where programming took place.
Instrument Cluster Module (ICM)
Fuel System
앫 Operating Temperature: −40°C to +85°C
(−40°F to +185°F)
The V-MAC IV fuel system consists of six
individually controlled fuel injectors called 앫 Humidity: 45% to 75% RH
Integrated Unit Injectors (IUI). Each IUI performs
앫 Rated Voltage: 12 volts
timing and fuel control functions that optimize
engine performance for emissions, noise, fuel
consumption and driveability.

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Gauge Driver Module (GDM) System Connectors

Information not available at time of publication. The V-MAC IV system uses several connector
types. Most of the V-MAC IV system testing is
done in the largest connectors (EMS, VECU,
Power and Ground Connections ICM, GDM and Serial Communication Port).

To allow the battery to act as a filter, an

electrically solid connection to the battery (both ENGINE MANAGEMENT SYSTEM (EMS)
Vbatt+ and Vbatt−) is recommended. CONNECTORS

앫 Battery Feed: Direct to Vbatt+ or electronics The MACK® MP7/MP8 EMS contains two 62-pin
power bus connectors (see Figure 1). To disconnect a
connector from the EMS, flip up the connector
lock handles and gently pull the connector on its
heel and away from the EMS. The following
illustrations show each pin number as it appears
Sourcing to the starter motor stud is not on the back of the EMS connectors. When
recommended. checking the pin numbers, align the connector as
shown in the illustration to avoid confusion. The
앫 Battery Ground: Direct to Vbatt ground post connector number and EMS orientation are
or to an isolated electronics single point shown as a reference for reconnecting the EMS
ground to the engine harness.
앫 Circuit Current Capacity: 25 amps
앫 Minimum Starting Voltage Required:
9.0 volts
앫 Minimum Running Voltage Required:
9.5 volts on 12-volt systems
앫 Maximum Voltage that can be applied to the
module: 24 volts (up to three minutes) for
12-volt systems

Under normal operating conditions, the ECUs will

function properly when supply voltage is within
9.0 and 16.0 volts for 12-volt systems.

The V-MAC IV electronic system is protected

against jump-start conditions for up to three
minutes. The VECU is protected against short
circuits to battery on all pins. The EMS is
protected against short circuits to battery on all
pins except the ground pins. A short circuit on the
ground will open the fuse.

The VECU is internally protected from reverse

voltage.

The EMS is not internally protected from reverse

voltage; therefore, the EMS should receive Vbatt+
directly from the power relay circuit.

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Figure 1 — EMS Connectors (for MACK® MP7/MP8)

NOTES ON MACK® MP7/MP8 EMS CONNECTORS

Connector Description
A Used for: Sensor signals, electronic unit injection, low-side drives and engine drives, J1708, J1587
high and low and several switch inputs. Contains: 62 pins
B Used for: Power, ground, J1939, sensor signals and switch inputs, and output drives other than
pump drives. Contains: 62 pins

EMS CONNECTOR PART NUMBERS (FOR MACK® MP7/MP8)

Description Mack Part No.

A: Connector 20429842
A: Terminal (0.5–1.0) 983014
A: Terminal (1.5–2.5) 383020
A: Cable Seal (1.9–2.1) 983016
A: Cable Seal (2.2–3.0) 970773
A: Cable Seal (0–0) 970771
A: Cable Seal (3.6) 983017

B: Connector 20429843
B: Terminal (0.5–1.0) 983014
B: Terminal (1.5–2.5) 383020
B: Cable Seal (1.9–2.1) 983016
B: Cable Seal (2.2–3.0) 970773
B: Cable Seal (0–0) 970771
B: Cable Seal (3.6) 983017

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Figure 2 — EMS Pinouts

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The following pin assignments are used on the EMS:

3

Figure 3 — Engine Management System Pin Assignments (Pinout 1 of 2)

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Figure 4 — Engine Management System Pin Assignments (Pinout 2 of 2)

For a complete listing of EMS connector pin

designations, refer to “Engine Management
System (EMS) Connector Pin Designations” on
page 105.

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VEHICLE ELECTRONIC CONTROL UNIT

(VECU) CONNECTORS
The Vehicle ECU has three connectors: A, B and The Vehicle ECU connector is not sealed against
C. Connectors A and B contain 30-pin moisture; ALWAYS mount in the downward
assignments, while Connector C contains five-pin position.
assignments. Each pin is marked on the outside
of the connector. To disconnect a connector from
the VECU, press down on the tang of the harness
connector and gently pull the connector from the
VECU. Make sure the connector is aligned as
shown in the illustration to avoid confusion when
checking pin numbers. The connector number
and color are shown as a reference for
reconnecting the VECU to the cab harness.
5

Figure 5 — VECU Connectors

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VECU CONNECTOR PART NUMBERS

Connector Mack Part No.

A — Green 957AM23
B — Blue 957AM24
C — Green 957AM21
Pins 925AM266 (22–18 AWG)

Figure 6 — VECU Pinouts

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The following pin assignments are used on the vehicle ECU:

7

Figure 7 — Vehicle ECU Pin Assignments for CHU, CXU and GU Models (Pinout 1 of 3)

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Figure 8 — Vehicle ECU Pin Assignments for CHU, CXU and GU Models (Pinout 2 of 3)

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Figure 9 — Vehicle ECU Pin Assignments for CHU, CXU and GU Models (Pinout 3 of 3)

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The following pin assignments are used on the vehicle ECU:

10

Figure 10 — Vehicle ECU Pin Assignments for LEU Models (Pinout 1 of 3)

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11

Figure 11 — Vehicle ECU Pin Assignments for LEU Models (Pinout 2 of 3)

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12

Figure 12 — Vehicle ECU Pin Assignments for LEU Models (Pinout 3 of 3)

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The following pin assignments are used on the vehicle ECU:

13

Figure 13 — Vehicle ECU Pin Assignments for MRU Models (Pinout 1 of 3)

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14

Figure 14 — Vehicle ECU Pin Assignments for MRU Models (Pinout 2 of 3)

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15

Figure 15 — Vehicle ECU Pin Assignments for MRU Models (Pinout 3 of 3)

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16

Figure 16 — Legend for VECU Pin Assignments

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For a complete listing of VECU connector pin To disconnect a connector from the ICM, press
designations, refer to “Vehicle Electronic Control down on the tang of the harness connector and
Unit (VECU) Connector Pin Designations” on gently pull the connector from the ICM. Make
page 107. sure the connector is aligned as shown in the
illustration to avoid confusion when checking pin
numbers. The connector number and color are
INSTRUMENT CLUSTER MODULE (ICM)
shown as a reference for reconnecting the ICM to
CONNECTORS
the cab harness.
The ICM has three connectors: A, B and C. 17

Connectors A and B contain 30-pin assignments,

while Connector C contains 22-pin assignments.

Figure 17 — ICM Connectors

ICM CONNECTOR PART NUMBERS

Connector Mack Part No.

A — Blue 957AM24
B — Green 957AM23
C — Green 957AM22
Pins 925AM266 (22–18 AWG)

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18

Figure 18 — ICM Pinouts

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The following pin assignments are used for the Instrument Cluster Module:
19

Figure 19 — Instrument Cluster Module Pin Assignments for CHU, CXU and GU Models (Pinout 1 of 3)

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20

Figure 20 — Instrument Cluster Module Pin Assignments for CHU, CXU and GU Models (Pinout 2 of 3)

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21

Figure 21 — Instrument Cluster Module Pin Assignments for CHU, CXU and GU Models (Pinout 3 of 3)

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22

Figure 22 — Legend for ICM Pin Assignments

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For a complete listing of the ICM connector pin GDM, press down on the tang of the harness
designations, refer to “SYSTEM CONNECTOR connector and gently pull the connector from the
PIN DESIGNATIONS” on page 105. GDM. Make sure the connector is aligned as
shown in the illustration to avoid confusion when
checking pin numbers. The connector number
GAUGE DRIVER MODULE (GDM)
and color are shown as a reference for
The GDM has two connectors: A and B. reconnecting the GDM to the cab harness.
Connectors A and B both contain 30-pin 23

assignments. To disconnect a connector from the

Figure 23 — GDM Connectors

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24

Figure 24 — GDM Pinouts

GDM CONNECTOR PART NUMBERS

Connector Volvo/Mack Part No.

A — White 20409351
B — Orange 20409352
Pins 925AM266 (22–18 AWG)

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The following pin assignments are used for the Gauge Driver Module.
25

Figure 25 — Gauge Driver Module Pin Assignments for LEU and MRU Models (Pinout 1 of 2)

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26

Figure 26 — Gauge Driver Module Pin Assignments (Pinout 2 of 2)

SERIAL COMMUNICATION PORT

27

The Serial Communication Port is a nine-pin

connector used for system diagnostics and
reprogramming. It is located under the dashboard
to the left of the steering column. This port is
used for connecting the diagnostic computer.

For a listing of the signal on each pin designation,

refer to “Instrument Cluster Module (ICM)
Connector Pin Designations” on page 110.

Figure 27 — Serial Communication Port (9 Pin)

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ENGINE MANAGEMENT 앫 Measurement function: Measures the

relative humidity in % RH and delivers an
SYSTEM SENSORS analog signal in proportion to humidity
앫 Fault Detection: Short to ground, loss of
Aftertreatment Fuel Injector ground, short circuit to +5V, short circuit to
Pressure Sensor battery voltage
앫 Mack P/N: 64MT490M
The aftertreatment fuel injector pressure
앫 Volvo P/N: 21046544
sensor — sometimes referred to as the DPF fuel
pressure sensor — is supplied with fuel during a
diesel particulate filter regeneration event. The Boost Pressure-Temperature
aftertreatment fuel injector fuel pressure is
measured by a pressure sensor mounted in the Sensors
aftertreatment fuel system solenoid valve.
There are two “boost” sensors and they use the
앫 Sensor Type: Pressure Transducer same part number: boost pressure and boost
앫 Operating Temperature: –40°C to 125°C temperature. The boost pressure sensor is
(–40°F to 257°F) located on the EGR mixing plenum and
measures the boost pressure of the EGR mixer.
앫 Nominal Operating Voltage: 5.0V The boost temperature sensor is located at the
앫 Operating Voltage Range (V5): rear of the inlet manifold and measures the
5.00 ± 0.25 VDC temperature of the inlet manifold. The sensors
use a pressure-sensitive diaphragm movement.
앫 Fault Detection: to +5V Information from these sensors is transmitted on
앫 Mack P/N: 20898038 the J1587 communications line using PID 439.

Air-Humidity Sensor
Information from this sensor is needed for fuel
The air-humidity sensor — located in the inlet air and EGR control.
duct work between the air filter and turbocharger
inlet — is a combination-type sensor that 앫 Sensor Type: Piez-Resistive
monitors humidity and temperature. The Pressure/Temperature
information from this sensor is used to determine
the oxygen and water content in the inlet air. 앫 Design: Housing of the sensor holds
앫 Sensing elements and electronic
The humidity portion of the sensor is a three-wire device for piez-resistive pressure
device (5 volt, ground and signal). The output measurement
voltage is proportional to the relative humidity.
The air temperature portion of the sensor is a 앫 Sensing element for temperature
thermistor that has varying resistance according measurement
to temperature. The sensor has a negative 앫 Socket for mechanical connection
temperature coefficient (meaning the sensor
resistance decreases as the temperature 앫 Electrical connector
increases). 앫 Operating temperature: −40°C to +130°C
앫 Sensor Type: Combination (−40°F to 266°F)
앫 Design: Housing holding the sensor 앫 Measurement function: Measures to the
element; integral connector, electrically boost pressure inside the inlet air manifold
connecting the sensor elements with the and the boost temperature inside the inlet
measuring device manifold
앫 Fault Detection: Short to ground, open
앫 Operating temperature: −40°C to +85°C
(−40°F to 185°F) 앫 Mack P/N: 64MT480M
앫 Volvo P/N: 20524936

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Camshaft Position (Engine Position) Crank Speed (Engine Speed)

Sensor Sensor
The camshaft position sensor, located in the Engine speed information is used to determine
outside face of the timing gear cover, uses the optimal timing and maximum fuel delivery. The
principle of magnetic induction to produce an crank speed sensor, located on top of the
electric pulse. It senses the passage of any of the flywheel housing, provides crankshaft position
seven timing notches machined on the edge of information that is compared with engine position
the camshaft dampener. Six of the notches sensor information to calculate the current
represent top dead center (TDC) marks for the six injection timing.
cylinders. The seventh mark is used for timing
reference to determine the position of cylinder The crank speed sensor also uses magnetic
No. 1. induction and functions in the same manner as
the camshaft position sensor (previously
described). The sensor generates an electric
pulse whenever one of the notches on the
The information provided by the camshaft flywheel ring gear passes close to the tip of the
position sensor was designed for use by the EMS sensor. There are three sets of 18 notches on the
only. If an accurate camshaft position/engine edge of the flywheel that pass close enough to
position signal is needed, tap into the tachometer the sensor tip to provide an electric pulse.
drive from the camshaft position/engine position Because each pulse occurs in a fixed
signal line. As an alternative, access engine and relationship, the pulses generated during each
vehicle speed information off of the J1587 line. revolution of the engine crankshaft provide a
reference of top dead center (TDC) for each
piston.
앫 Sensor Type: Magnetic Induction
앫 Design: Housing of the sensor holds
앫 Sensing device for speed
measurement, which principle is The information provided by the crank speed
variable reluctance sensor was designed for use by the EMS only. If
an accurate engine speed signal is needed, tap
앫 Socket for mechanical connection into the tachometer drive from the ICM at the
앫 Electrical connector buffered RPM junction black stud on the electrical
equipment panel. As an alternative, access
앫 Operating temperature: −40°C to +130°C engine and vehicle speed information off of the
(−40°F to 266°F) J1587 line.
앫 Output requirements: Winding resistance
shall not exceed 1.5 ohms 앫 Sensor Type: Variable Reluctance
앫 Cam wheel — speed at 25 rpm; output 앫 Design: Housing of the sensor holds:
at Vout>0.15 Vp
앫 Sensing device for speed
앫 Fault Detection: Inactive (no signal)/missing measurement, which principle is
variable reluctance
앫 Mack P/N: 20513343
앫 Socket for mechanical connection
앫 Electrical connector
앫 Operating temperature: −40°C to +130°C
(−40°F to 266°F)
앫 Output requirements: Winding resistance
shall not exceed 1.5 ohms
앫 Fault Detection: Inactive (no signal)
앫 Mack P/N: 20513343

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Coolant Level Sensor 앫 Sensor Type: Resistive

앫 Design: Housing of the sensor holds:
The coolant level sensor, mounted in the remote 앫 Sensing element for temperature
reservoir, consists of a pair of flexible switch measurement, which principle is an
reeds made of a magnetic material, and sealed in NTC-resistor
a glass tube filled with inert gas. The reeds are
overlapped but separated by a small gap. The 앫 Socket for mechanical connection
contact area of each reed is plated with a special 앫 Electrical connector
metal to provide the switch with stability. A 앫 Operating Temperature: −40°C to +140°C
magnetic field, from a floating magnet, is used to (−40°F to 284°F)
cause both reed switches to be magnetized to
produce an N-pole at the contact area of one 앫 Fault Detection: Open, supply voltage, short
reed, and an S-pole at that of the other reed. If to ground or Vbatt
the magnetic attracting force overcomes the 앫 Mack P/N: 20513340
resistive force caused by elasticity of the reed, the
reeds come in contact (Pull-In), i.e., the circuit is
closed. Once the magnetic field is removed, the Crankcase Pressure Sensor
reeds are separated again by the effect of
elasticity of the reed (Drop-Out), i.e., the circuit is The crankcase pressure sensor, usually located
opened. If the latter, the sensor will signal that the on the valve cover on the left-hand side, monitors
coolant level is low. the crankcase pressure. This sensor uses a
pressure-sensitive diaphragm and an electrical
앫 Sensor Type: Float Switch amplifier to calculate gauge pressure. When the
앫 Fault Detection: Open, short to ground or crankcase pressure changes, the diaphragm
Vbatt moves and the amplifier produces an electrical
signal proportional to the diaphragm movement.
앫 Mack P/N: 64MT482AM (for LEU and MRU
model trucks) 앫 Sensor Type: Pressure Transducer
앫 Mack/Volvo P/N: 20900982 앫 Design: Sensor consists of:
앫 Housing containing the pressure
Coolant Temperature Sensor sender
앫 Pipe containing the temperature
The coolant temperature sensor, usually located element (NTC)
in the right front bottom corner of the cylinder 앫 Electrical connection
head, is a thermistor that has varying resistance
according to temperature. The sensor has a 앫 Mechanical thread connection
negative temperature coefficient (this means the 앫 Operating Temperature: −40°C to +140°C
sensor resistance decreases as the temperature (−40°F to 284°F)
increases). Information from this sensor is used
to evaluate operating conditions that cause high 앫 Output Signal: Nominal output voltage @
coolant temperatures, such as radiator blockage, +25°C (77°F) and Vs = 5.000 ± 0.002 VDC:
thermostat failure, heavy load, high ambient air 앫 0.5000 VDC @ min pressure to
temperatures, etc. Information from this sensor is 4.500 VDC @ max pressure
also used by the EMS for cold start
enhancement. The EMS applies more fuel 앫 Accuracy Range:
whenever the coolant temperature is below a 앫 ± 3% of full pressure (0°C to +110°C
specified threshold. When an ON/OFF fan or [32°F to 230°F])
electronic viscous fan clutch is installed,
information from the coolant temperature sensor 앫 ± 5% of full pressure (−40°C to 0°C and
is used to control operation of the fan clutch. +110°C to +150°C [−40°F to 32°F and
230°F to 302°F])
앫 Fault Detection: Open, short to ground or
Vbatt
앫 Mack P/N: 20796744

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Diesel Particulate Filter (DPF) Exhaust Gas Recirculation (EGR)

Differential Pressure Sensor Differential Pressure Sensor
The DPF Differential Pressure sensor — located The EGR Differential Pressure sensor is a
on the DPF inlet house outboard facing — ceramic, capacitive type pressure transducer.
monitors pressure across the filter canister. When The sensor measures changes in EGR flow and
the different pressure across the filter canister is communicates to the VGT actuator and EGR
raised to a sufficient level, the filter heating valve through a closed-loop electronic system.
elements will be turned on, one at a time, to burn The sensor outputs a voltage to the EMS in direct
off particulates and to reduce the pressure drop. proportion to the pressure drop across the orifice
in the EGR pipe. In this way the EMS can make
앫 Sensor Type: Pressure Transducer
an accurate assessment of the gas flow through
앫 Operating Temperature: –40°C to 125°C the tube. The sensor is located in the EGR mixing
(–40°F to 257°F) plenum.
앫 Nominal Operating Voltage: 5.0V 앫 Sensor Type: Pressure Transducer
앫 Operating Voltage Range (V5): 앫 Design: Sensor consists of —
5.00 ± 0.25 VDC
앫 Housing
앫 Fault Detection: Short circuit to ground, loss
앫 Gasket (Sealing)
of ground, short circuit to +5V
앫 Mounting Bracket
앫 Mack P/N: 20451992
앫 Operating Temperature: –40°C to 125°C
(–40°F to 257°F)
DPF Temperature Sensors (Pre CAT,
앫 Operating Supply Voltage (V5):
Post CAT, Post DPF) 5.00 ± 0.25 VDC

The exhaust temperature is measured by three 앫 Fault Detection: Open, short to ground or
sensors, mounted in different areas of the DPF. signal line
The DPF temperature sensor at the DPF inlet 앫 Mack P/N: 20930137
measures the temperature of the exhaust as it
enters the DPF. The DPF temperature sensor
after the catalyst measures the temperature of
the exhaust as it leaves the catalyst section of the
DPF. The DPF temperature sensor at the DPF
outlet measures the temperature of the exhaust
as it leaves the DPF.
앫 Sensor Type: Thermistor
앫 Operating Temperature: –40°C to 850°C
(–40°F to 1562°F)
앫 Nominal Operating Voltage: 5.0V
앫 Operating Voltage Range (V5):
5.00 ± 0.25 VDC
앫 Fault Detection: Short circuit to ground, loss
of ground, short circuit to +5V
앫 Mack P/N: 20451990

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EGR Temperature Aftercooler 앫 Accuracy Range:

Sensor 앫 ± 3% of full pressure (0°C to +110°C
[32°F to 230°F])
The EGR Temperature Aftercooler sensor — 앫 ± 5% of full pressure (−40°C to 0°C and
located in the EGR mixing plenum — is a +110°C to +150°C [−40°F to 32°F and
thermistor that has varying resistance according 230°F to 302°F])
to temperature. Information from this sensor is
used to evaluate operating conditions that cause 앫 Fault Detection: Open, short to ground or
high exhaust gas temperatures measures the Vbatt
exhaust gas temperature. When the EGR 앫 Mack P/N: 20898038
temperature becomes too high, a fault is logged,
indicating the EGR cooler has failed or has
become plugged. NOx Sensor
앫 Sensor Type: Thermistor
The NOx sensor, located in the diesel particulate
앫 Storage Temperature: –40°C to 100°C filter outlet housing, is a multifunctional exhaust
(–40°F to 212°F) gas sensor that measures nitrogen oxide
앫 Operating Supply Voltage (V5): concentration values in the exhaust pipe.
5.00 ± 0.25 VDC 앫 Sensor Type: Thermistor
앫 Fault Detection: Open, short to ground or 앫 Design: Sensor consists of:
measuring line
앫 Housing containing the sensing
앫 Mack P/N: 21010707 element
앫 NOx Electronic Control Unit (ECU)
Fuel Pressure Sensor interfacing the sensor and EMS
앫 Wire electrically connecting the sensing
The fuel pressure sensor, located near the top of element with the NOx ECU
the fuel filter on the left-hand side, monitors the
fuel pressure. This sensor uses a 앫 Operating Temperature:
pressure-sensitive diaphragm and an electrical 앫 Ambient: −40°C to 105°C (−40°F to
amplifier to calculate gauge pressure. When the 221°F)
fuel pressure changes, the diaphragm moves and
the amplifier produces an electrical signal 앫 Exhaust: Less than or equal to 800°C
proportional to the diaphragm movement. (1472°F)

앫 Sensor Type: Piezo-Resistive 앫 Voltage:

앫 Design: Sensor consists of: 앫 Nominal Operating Voltage: 14.2 V

앫 Housing containing the pressure 앫 Operating Voltage Range: 11.5 to 16 V

sender 앫 Fault Detection: Open, short to ground or
앫 Pipe containing the temperature Vbatt.
element (NTC) 앫 Mack P/N: 21069361
앫 Electrical connection
앫 Mechanical thread connection
앫 Operating Temperature: −40°C to +140°C
(−40°F to 284°F)
앫 Output Signal: Nominal output voltage @
+25°C (77°F) and Vs = 5.000 ± 0.002 VDC:
앫 0.5000 VDC @ min pressure to
4.500 VDC @ max pressure

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Oil Pressure Sensor Oil Level-Temperature Sensor

The oil pressure sensor, located near the top of The oil level-temperature sensor, mounted inside
the oil filter on the right-hand side, monitors the at the bottom of the oil sump, monitors the oil
oil pressure. This sensor uses a level and temperature. When the oil level or
pressure-sensitive diaphragm and an electrical temperature changes, a diaphragm in the sensor
amplifier to calculate gauge pressure. When the moves and the amplifier produces an electrical
oil pressure changes, the diaphragm moves and signal proportional to the diaphragm movement.
the amplifier produces an electrical signal
앫 Sensor Type: Resistive
proportional to the diaphragm movement.
앫 Design: Sensor consists of:
앫 Sensor Type: Piezo-Resistive
앫 Housing containing an electrothermal
앫 Design: Sensor consists of:
element
앫 Housing containing the pressure
앫 Socket with three holes
sender
앫 Cable
앫 Pipe containing the temperature
element (NTC) 앫 Electrical connection with included
sump wall entrance
앫 Electrical connection
앫 Operating Temperature: −40°C to +140°C
앫 Mechanical thread connection
(−40°F to 284°F) continuous and +150°C
앫 Operating Temperature: −40°C to +140°C (302°F) for 1 hour
(−40°F to 284°F)
앫 Voltage and current ratings:
앫 Output signal: Nominal output voltage @
앫 Nominal Operating Current: 247 mA
+25°C (77°F) and Vs = 5.000 ± 0.002 VDC:
앫 Operating Current Range: 250 mA
앫 0.5000 VDC @ min pressure to
± 20 mA
4.500 VDC @ max pressure
앫 Rated Voltage: 5 to 30 VDC
앫 Accuracy Range:
앫 Fault Detection: Open, short to ground or
앫 ± 3% of full pressure (0°C to +110°C
Vbatt
[32°F to 230°F])
앫 Mack P/N: 24424110
앫 ± 5% of full pressure (−40°C to 0°C and
+110°C to +150°C [−40°F to 32°F and
230°F to 302°F])
앫 Fault Detection: Open, short to ground or
Vbatt
앫 Mack P/N: 20886108

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Turbocharger Speed Sensor Water in Fuel Filter Sensor

The turbocharger speed sensor — mounted in The water in fuel filter (WIFF) sensor — located in
the turbocharger housing — is a variable the transparent plastic bowl under the fuel filter —
reluctance sensor. Using the principle of is a water sensing probe. If water is detected, the
magnetic induction, the sensor generates an WIFF sensor will notify the driver to drain the
electric pulse each time the single tooth on the collection bowl. Reset is automatic and requires
turbocharger shaft passes close to the sensor tip. no service tool.
앫 Sensor Type: Actuator
Turbocharger speed is constantly monitored, and
if the speed exceeds certain limits based on 앫 Design: One-piece design with two wires
altitude, engine power will be reduced in order to
앫 Voltage: 12 volts
protect the turbocharger. If the sensor fails,
resulting in speeds above or below the normal, a 앫 Fault Detection: Short to ground or Vbatt
default value will be selected to reduce engine
앫 Mack P/N: 20771580
power.
앫 Sensor Type: Variable Reluctance
앫 Fault Detection: Valid but Low, Missing
Signal
앫 Mack P/N: 24427413

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 VENDOR APPLICATION GUIDE V-MAC IV 07 EMISSIONS STD.

VEHICLE ELECTRONIC The throttle position sensor is a three-wire,

ratio-metric type sensor that conforms to SAE
CONTROL SENSORS J1843 requirements. The sensor is supplied by a
5-volt reference voltage.
Throttle (Accelerator) Position 앫 Sensor Type: Resistive
Sensor 앫 Supplier: Williams, model WM-540 or
equivalent
The throttle position sensor, located above the
앫 Fault Detection: Open, short to ground
accelerator pedal, provides the V-MAC IV system
(below 0.4 volt) or Vbatt (above 4.9 volts)
with driver fuel requirement input. This sensor is a
potentiometer (variable resistor) linked to the 앫 Maximum Reference Current: 10 mA
accelerator pedal and replaces the mechanical
앫 Mack P/N: 4QB414M
linkage for fuel control. As the pedal is pressed,
the sensor resistance will change and the signal
voltage of the sensor will indicate the accelerator AUXILIARY ACCELERATOR PEDAL SIGNAL
pedal position.
Mack Trucks, Inc., has designed an extensive
speed control system that allows for external
speed control through an auxiliary accelerator
pedal signal. The pedal is wired in parallel using a
The Idle Validation switch is also integrated in the multi-pin selector switch. If the signal is not
throttle position sensor assembly. switched between the two accelerator pedals, a
fault code may be generated due to high current
at the throttle pedal signal input line (VECU B-8).

An identical pedal is needed for the auxiliary

sensor accelerator pedal because it requires an
IVS signal. A substitute type pedal may cause a
fault code and is not recommended.

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28

Figure 28 — Auxiliary Accelerator Pedal Signal

Vehicle Speed (Road Speed) Sensor 앫 Sensor Type: Variable reluctance

앫 Minimum Voltage Sensed: 0.225 volt peak
The vehicle speed sensor is located at the ± 0.025 volt
transmission output shaft. Vehicle speed
information is used for cruise control and road 앫 Fault Detection: Open, short to ground or
speed limit modes. The vehicle speed sensor Vbatt, inactive (no signal) and erratic
functions in a similar manner to the crank speed (>128 mph)
(engine speed) sensor (refer to “Crank Speed 앫 Mack P/N: 64MT439M
(Engine Speed) Sensor” on page 35). Using the
principle of magnetic induction, the sensor
generates an electric pulse each time one of the
teeth on a 16-tooth tone wheel (mounted on the
transmission output shaft) passes close to the
sensor tip.

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 VENDOR APPLICATION GUIDE V-MAC IV 07 EMISSIONS STD.

INSTRUMENT CLUSTER Ambient Air Temperature Sensor

MODULE SENSORS
The ambient air temperature sensor — generally
located toward the front of the chassis, mounted
Air Brake Application Sensor either on the front cross member behind the
bumper, on a hood hinge, hood hinge bracket,
The air brake application sensor — mounted on body panel, spring bracket or grille guard
the double check valve (attached to the tractor assembly — monitors the outside air
protection valve) — converts air pressure into an temperature. Information from this sensor is
electrical signal that is then transmitted into a displayed on the driver information display
pressure reading displayed in the instrument (Co-Pilot® or Basic Display). The sensor has a
cluster. negative temperature coefficient (this means the
sensor resistance decreases as the temperature
앫 Sensor Type: Pressure Transducer increases).
앫 Range: 0 to 174 psig 앫 Sensor Type: Thermistor, negative
앫 Voltage Supply: 5.00 ±0.25 VDC temperature coefficient
앫 Operating Temperature: −40°C to 85°C 앫 Fault Detection: Open or short to ground and
(−40°F to 185°F) short to Vbatt
앫 Fault Detection: Short to ground, loss of 앫 Mack P/N: 64MT2118M
ground, short circuit to +5V, short circuit to
battery voltage
Front Drive Axle Temperature
앫 Mack P/N: 64MT373 Sensor
Air Suspension Pressure Sensor The front drive axle temperature sensor —
located in the bottom of the front carrier —
The air suspension pressure sensor — mounted monitors the vehicle’s front axle temperature.
on the inside of the truck frame rail — measures This sensor is a thermistor that has varying
the system pressure in the truck by converting resistance according to temperature. The sensor
into an electrical signal and transmitting into a has a negative temperature coefficient (this
pressure reading displayed in the instrument means the sensor resistance decreases as the
cluster. temperature increases).
앫 Sensor Type: Pressure Transducer 앫 Sensor Type: Thermistor, negative
temperature coefficient
앫 Range: 0 to 174 psig
앫 Filter Network: 1.0 msec
앫 Voltage Supply: 5.00 ±0.25 VDC
앫 Fault Detection: Open, short to ground or
앫 Operating Temperature: −40°C to 85°C Vbatt
(−40°F to 185°F)
앫 Mack P/N: 64MT2113AM
앫 Fault Detection: Short to ground, loss of
ground, short circuit to +5V, short circuit to
battery voltage
앫 Mack P/N: 64MT373

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Fuel Level Sensor Primary and Secondary Air

Pressure Sensor
The fuel level sensor — usually located in the left
fuel tank on vehicles equipped with two fuel The primary and secondary air pressure
tanks, is a one-wire passive device that monitors sensor — located in the driver control module —
the fuel level for driver display. monitors the primary and secondary air pressure
앫 Sensor Type: Passive resistance element in the air reservoirs.
앫 Sensor Supply Voltage: 5 volts 앫 Sensor Type: Pressure Transducer
앫 Sensor Supply Current: Limited to 75 mA 앫 Range: 0 to 174 psig
maximum
앫 Voltage Supply: 5.00 ±0.25 VDC
앫 Filter Network: 1.0 msec
앫 Operating Temperature: −40°C to 85°C
앫 Fault Detection: Open (≥ 1k ohms), short to (−40°F to 185°F)
ground (≤ 20 ohms) or Vbatt
앫 Fault Detection: Short to ground, loss of
앫 Mack P/N:16MD48 ground, short circuit to +5V, short circuit to
battery voltage
Interior Cab Temperature Sensor 앫 Mack P/N: 64MT373

The interior cab temperature sensor monitors the

inside air temperature of the cabin. Information Transmission Oil Temperature
from this sensor is used by the ICM for climate Sensor
control and comfort of the cabin. The sensor has
a negative temperature coefficient (this means The transmission oil temperature sensor —
the sensor resistance decreases as the located in the transmission oil cooler elbow at the
temperature increases). transmission — monitors the temperature of the
앫 Sensor Type: Thermistor, negative lubricating oil as it exits the transmission. This
temperature coefficient sensor is a thermistor that has varying resistance
according to temperature. The sensor has a
앫 Fault Detection: Open or short to ground and negative temperature coefficient (this means the
short to Vbatt sensor resistance decreases as the temperature
앫 Mack P/N: 64MT391M increases).
앫 Sensor Type: Thermistor, negative
Rear Drive Axle Temperature temperature coefficient
Sensor 앫 Filter Network: 1.0 msec
앫 Fault Detection: Open, short to ground or
The rear drive axle temperature sensor — Vbatt
located in the bottom of the rear carrier —
앫 Mack P/N: 64MT2113AM
monitors the vehicle’s rear axle temperature. This
sensor is a thermistor that has varying resistance
Allison transmissions have an additional
according to temperature. The sensor has a
transmission oil temperature sensor on the right
negative temperature coefficient (this means the
side of the transmission that measures sump
sensor resistance decreases as the temperature
temperature. The transmission oil temperature at
increases).
the sump is generally cooler than at the cooler
앫 Sensor Type: Thermistor, negative elbow. The sensor at the elbow determines what
temperature coefficient is shown in the gauge and in most cases,
temperature faults and engine shutdown (if
앫 Filter Network: 1.0 msec
configured). For an Allison transmission, the
앫 Fault Detection: Open, short to ground or sump temperature determines transmission oil
Vbatt temperature faults and shutdown.
앫 Mack P/N: 64MT2113AM

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 VENDOR APPLICATION GUIDE V-MAC IV 07 EMISSIONS STD.

AUTOMATIC TRANSMISSION OIL Automated Transmissions

TEMPERATURE
The EMS can be programmed to use V-MAC IV supports the following automated
transmission temperature information (provided transmissions:
on the J1587/J1708 and J1939 communications 앫 Eaton® Autoshift
line by the Allison 4000/4500 Series) as a
determining factor for engine shutdown based on 앫 Eaton® Ultrashift
transmission sump oil temperature. A warning will 앫 Meritor ESS
be issued at 121°C (250°F) for 15 minutes or
126.6°C (260°F) for 1 minute. Engine de-rate will 앫 Meritor FreedomLine (for future support)
occur at 129.4°C (265°F). Engine shutdown will
occur at 132.2°C (270°F). OTHER AUTOMATED TRANSMISSIONS
For V-MAC IV MACK® MP7 engines, Mack
Trucks, Inc. provides the capability for connection
If vehicle speed remains above 5 km/h (3 m/h), with various automated transmissions using SAE
engine shutdown will not occur. J1939.

Manual Transmissions
Automatic Transmissions
V-MAC IV supports the following manual
V-MAC IV supports the following automatic transmissions:
transmissions: 앫 Fuller RT/FR Series
앫 Allison 4000 Series Gen 4 앫 Fuller T Series
앫 Allison 4500 Series Gen 4 앫 Spicer
앫 Meritor M/MO Series
ALLISON 4000/4500 SERIES
The Allison 4000/4500 Series requires
connection to the SAE J1587/J1708 data link and
SAE J1939 data link to communicate with the
Vehicle ECU. Information from this line can be
used to obtain tail shaft speed information instead
of a vehicle speed sensor (special data file
required).

OEM Requirements:
앫 SAE J1587/J1708 and SAE J1939 data link
connection to the Allison transmission
control

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 VENDOR APPLICATION GUIDE V-MAC IV 07 EMISSIONS STD.

SENSOR REQUIREMENTS 앫 All other sensors are optional and must be

supplied and installed by the OEM when
앫 Aftertreatment Fuel Pressure, Air-Humidity working with a bare engine.
Temperature, Ambient Air Temperature,
Boost Pressure, Boost Temperature,
Coolant Level, Coolant Temperature, DPF
Differential Pressure, EGR Diff Pressure, Engine Oil Temperature, Engine Oil Level, Fuel
EGR Temperature, Engine Oil Pressure, Temperature, Inlet Manifold Pressure, Vehicle
Engine Position, Engine Speed, Fan Speed, (Road) Speed, and Water in Fuel Filter sensors
Fuel Temperature, Intake Manifold Air have associated diagnostics that must be
Temperature, Throttle Position, Vehicle disabled if the sensors are not installed.
Speed, and Water in Fuel Filter sensors will
be supplied by Mack Trucks, Inc.

Vehicle speed sensors should be replaced with

resistors for stationary and marine applications.

Coolant level and throttle position sensors are

mandatory and MUST be supplied and installed
by the OEM if a bare engine is ordered.

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GAUGE DRIVER MODULE Exhaust Temperature (Pyrometer)

SENSORS Sensor
The exhaust temperature sensor — located in the
exhaust pipe — is a resistive temperature
The Gauge Driver Module is used for LEU and detector which monitors the exhaust gas
MRU truck models only. temperature of the engine. When the vehicle
exhaust temperature changes, the voltage
produced by the sensor changes. A reference
voltage is generated by a circuit with the GDM,
Air Suspension Pressure Sensor and the temperature of the exhaust gas is then
determined by comparing the sensor voltage to
Please refer to the “Air Suspension Pressure the reference voltage.
Sensor” on page 43 for information about this
sensor. 앫 Sensor Type: Resistive Temperature
Detector

Ambient Air Temperature Sensor 앫 Range: –40°C to 1000°C (–40°F to 1832°F)

앫 Fault Detection: Short to ground, loss of
Please refer to the “Ambient Air Temperature ground, short circuit +5V, short circuit to
Sensor” on page 43 for information about this battery voltage
sensor. 앫 Mack P/N: 64MT377M

Fuel Level Sensor

Please refer to the “Fuel Level Sensor” on page
44 for information about this sensor.

Primary and Secondary Air

Pressure Sensor
Please refer to the “Primary and Secondary Air
Pressure Sensor” on page 44 for information
about this sensor.

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 VENDOR APPLICATION GUIDE V-MAC IV 07 EMISSIONS STD.

SYSTEM INPUT SWITCHES 앫 Key Switch (ignition, preheat and start)

앫 Neutral Position (vendor manual and Allison
transmissions only)
General Switch Information
앫 Parking Brake
The V-MAC IV system receives information from 앫 PTO 1
several input switches. All switches must conform
to the following requirements: 앫 PTO 2
앫 Contact plating should not corrode or oxidize 앫 Remote Engine Shutdown
(gold-plated contacts are recommended) 앫 Service Brake
앫 Normal current draw through the contact 앫 Set/Resume
should not exceed 10.0 mA at a nominal
12 volts 앫 Spare 1 (PTO 3)
앫 Contact chatter and momentary opening or 앫 Spare 2 (PTO 4)
closing should not exceed 100 milliseconds 앫 Speed Control On/Off
in duration
앫 Water in Fuel Drain
앫 Contacts should not open or close due to
vibration or shock from the application
ICM SWITCHES
앫 Voltage thresholds (measured at V-MAC IV
switched inputs) should be within the 앫 Air Filter Restriction (sensor that acts like a
following limits: switch)

— Voltage Input (Low) < 2.0 volts 앫 Auto Start/Stop Engaged

앫 Axle Brake Wear, Front and Rear (sensors
— Voltage Input (High) > 8.0 volts
that act like a switch)
앫 Backup Lights
EMS SWITCHES
앫 Headlight High Beam
앫 Coolant Level (sensor that acts like a switch)
앫 Interwheel Front Differential Lock (actuator
앫 DPF Smart Switch status only; not from dash switch)
앫 Water in Fuel Filter (sensor that acts like a 앫 Interwheel Rear Differential Lock (actuator
switch) status only; not from dash switch)
앫 Mirror Defrost (heated mirror)
VECU SWITCHES
앫 Power Differential Lockout (inter-axle
앫 A/C Pressure differential lock switch, status)
앫 Accelerator Pedal Idle Validation (switch on 앫 Stalk Switch Selector
pedal)
앫 Turn Signals (left and right)
앫 Air Suspension
앫 Windshield Washer Level (sensor that acts
앫 Clutch Switch like a switch)
앫 Daytime Running Lights Override
앫 Engine Brake Low GDM SWITCHES
앫 Engine Brake High 앫 Air Filter Restriction
앫 Fan Clutch Override 앫 Air Pressure
앫 Fifth Wheel Slide (air-operated slide) 앫 Inter Axle Lock (Power Divided Lockout)
앫 Hood Tilt 앫 Reset
앫 Idle Shutdown Override 앫 Washer Fluid Level
앫 Interwheel Differential Lock

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 VENDOR APPLICATION GUIDE V-MAC IV 07 EMISSIONS STD.

A/C Pressure Switch (Optional) DPF Smart Switch

This is a normally closed switch which opens The DPF Switch is a smart switch that uses the
when A/C pressure reaches a point when fan J1939 line to send a signal to allow the operator
cooling is required. to either start or stop regeneration mode. The
switch has three positions: Top (Activate), Middle
(Neutral-Automatic Mode), and Bottom
Clutch Switch (Deactivate). The Top position is momentary and
reverts back to the Middle position upon release.
(Required for all vehicle installations and some The Bottom position will lock into place and
non-vehicle installations using engine speed remain locked until the operator presses the Top
control) position to release the switch back to the Middle
position.
The Clutch switch, mounted above the clutch
pedal, is normally open and closes when the The Top position is used to start manual
pedal is released (not pressed). It opens when regeneration mode or when illuminated, to
the pedal is pushed. Normally, speed control, indicate a regeneration is needed. The Lower
including cruise and engine brake control, will position is used to deactivate an automatic
disengage if the switch indicates that the clutch is regeneration mode. The Middle position indicates
disengaged (switch open, pedal pushed). “off.”

For additional information, please refer to the

Daytime Running Lights (DRL) Mack Trucks, Inc., Operator’s Handbooks that are
Override Switch (Optional) supplied with the truck.

Daytime Running Lights (DRL) come standard on Engine Brake Low and High Switch
all MACK vehicles and can be optioned with or
without an override switch. When the DRL (Optional)
Override switch has been specified, different
conditions can be selected that cause the DRL to The Engine Brake Low switch feeds into the
automatically activate. DRL can be automatically Vehicle ECU; however, it is used to notify the
turned on when the parking brake is released, the EMS that the driver is requesting first stage of the
engine is running or both. Using DRL will engine brake to turn on (LOW position).
illuminate the low beam headlamps at a slightly
reduced intensity. The DRL function will monitor The Engine Brake High switch feeds into the
high beams as well. If the high beams are Vehicle ECU; however, it is used to notify the
activated, the DRL will be temporarily turned off EMS that the driver is requesting the second
until high beam use ceases. stage of the engine brake to turn on (HIGH
position).
When the operator presses the DRL override
switch, the headlamps will go out if below the The signal is used for both low and high positions.
DRL speed threshold and flash if above the DRL
speed threshold for a designated period of time The following conditions are required to turn on
(parameter programmable in VCADS). It is also the engine brake:
possible to toggle the headlamps back on if
necessary. 앫 Engine Brake Low or High switch in the ON
position
앫 No fuel delivery to the engine
앫 Engine speed > 900 rpm
앫 Accelerator pedal at the 0% (low idle/0 fuel)
position

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Fan Clutch Override Switch Service Brake and Parking Brake

(Optional) Switches
This momentary contact switch feeds into the (Required for vehicle installations and some
VECU; however, it is used to notify the EMS that non-vehicle installations using engine speed
the driver is requesting the fan be turned ON (if control)
currently off) or OFF (if currently on). Override
privileges are programmed in the customer data The Service and Parking Brake switches are
spaces of the VECU and EMS. These parameters installed in the brake air system. The Service
allow the user to enable or block overrides. Brake switch is normally open and closes at an
application pressure of 6 psi. The Parking Brake
switch is normally closed and will close at a
Idle Shutdown Override Switch pressure decline of 75 psi (park brake set). It
(Optional) opens when air is delivered to the spring brake
chambers to release the spring brake.
The Idle Shutdown Override switch permits the
operator to override an idle shutdown using this BRAKE FAULT CONDITIONS
switch.
Generally, application of the parking brake while
The Idle Shutdown Override switch position the vehicle is moving will create an electronic
toggle is detected when the module senses a fault. Once the parking brake is turned off or the
positive edge trigger on the switch input (i.e., vehicle comes to a stop, the fault will become
0-volt to 12-volt transition). inactive. However, if Power Take-Off (PTO) 2 is
set up as a driveshaft PTO (and PTO 2 is
engaged), application of the parking brake while
Key Switch (Required) the vehicle is moving will not result in an
electronic fault. Driveshaft PTO operation
The key switch provides the VECU with requires that the parking brake be set while the
instructions to power the accessory relays and driveshaft is turning (creating apparent vehicle
the switched electrical power when the key is speed).
turned on. Fuel will only be supplied to the engine
when the key is in the ON position. Turning the If speed control is active and the vehicle suddenly
key to the OFF position will terminate fuel delivery decelerates without a service brake switch input,
and will cause the accessory relays/switched a service brake fault will become active. This fault
power to turn off six seconds later. will become inactive when a service brake switch
input is received. A service brake fault will not
become active if PTO 2 is set up as a driveshaft
Power Take-Off (PTO) 1 and PTO 2 PTO and PTO 2 is engaged.
Switches (Optional)
BRAKE INTERACTIONS WITH SPEED
These dedicated switches provide the VECU with CONTROL
information that PTO 1 or PTO 2 is engaged Cruise control will disengage when the service
when the switch contacts are closed. brakes are applied. Cruise control will also drop
out if the parking brake is applied.

PTO and Electronic Hand Throttle (EHT) control

Keep in mind that these are switch inputs; the can be programmed to drop out if the parking
Vehicle ECU does not engage any physical PTO. brake or service brakes are applied or to only
activate if the parking brake or service brakes are
applied.

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Set/Resume Switch (Optional) Spare 1 or PTO 3 (VECU pin VB-21)

and Spare 2 or PTO 4 (VECU pin
This momentary rocker switch controls the Set,
Decel, Resume and Accel functions. To ensure VA-17) Inputs (Optional)
that an undefined logic state does not occur, the
rocker switch uses two contacts to avoid These spare inputs are available for remapping to
simultaneous activation of both functions. When other functions for PTO 3 and PTO 4 if available.
the switch is pushed in one position, the Set
contact closes. When the switch is pushed in the
other position, the Resume contact closes.
Speed Control ON/OFF Switch

Both the Set and Resume switch positions are This two-position switch enables the speed
detected when the module senses a positive control function. When the switch is in the ON
edge trigger on the switch input (i.e., 0-volt to position, switch contacts are closed (12 volts on
12-volt transition). pin VA-3 of Vehicle ECU) and speed control is
enabled. However, speed control is not active
until a speed is set (using the Set switch or other
method). This switch should not be removed from
an existing vehicle.

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SYSTEM OUTPUTS Engine Brake Outputs

The MACK® MP7 engine brake consists of a
Buffered MPH Output one-piece cylinder head with a one-piece rocker
arm assembly. This assembly uses one solenoid
The output is intended as a buffered road speed to activate engine brake LOW or HIGH position,
signal for a vehicle speedometer (or other depending on engine oil flow to the exhaust
optional devices that require a pulsed road speed rocker arm assembly.
signal rather than reading it from the
J1708/J1587 serial link). Output is located on the 앫 Number of outputs: One
electrical equipment panel. 앫 Output Type: DC current sourcing
앫 Output Type: Frequency proportional to road 앫 Output Source: EMS
speed, 30,000 pulses/mile
앫 Output Drive (On) Current: 2 amps
앫 Output Source: Instrument Cluster Module maximum at 12 volts
앫 Waveform Type: Square wave 50% (TTL) 앫 Output High (On) Voltage: 12-volt supply
duty cycle
앫 Leakage Current: Less than 1.2 mA
앫 Source Driver: 4 volts minimum, 10 mA
maximum sourcing current 앫 Load Type: Inductive

앫 Diagnostics: Short to ground and short to 앫 Duty cycle: 100%

voltage 앫 Operating Voltage Range: 9.5 to 16 volts

Buffered RPM Output Exhaust Gas Recirculation (EGR)

Valve Output
This output is intended as a buffered tachometer
output signal for use with a tachometer (or other
optional devices that require engine speed data The EGR Valve — mounted to the exhaust
at a faster update rate than is available on the manifold — reduces oxides of nitrogen (NOx) in
J1708/J1587 serial link). Output is located on the emissions by recirculating some of the exhaust
electrical equipment panel. gas back into the intake of the engine to lower
combustion temperature.
앫 Output Type: Frequency proportional to
engine speed, 12 pulses/revolution The MACK® MP7 EMS controls the position of
앫 Output Source: Instrument Cluster Module the EGR valve. Voltage is switched to maintain a
constant average target current. In turn, the
앫 Waveform Type: Square wave 50% (TTL) actuator controls an oil pressure spool valve. The
duty cycle oil pressure drives the EGR valve to the desired
앫 Source Driver: 4 volts minimum, 10 mA position. The EMS controls both the high and low
maximum sourcing current sides of the drive.

앫 Diagnostics: Short to ground and short to 앫 Output Type: High and Low Side Drives
voltage 앫 Output Source: Switched 12V to maintain
target current
앫 Load Type: Inductive
앫 Fault Detection: Open, short to ground,
mechanical system not responding
앫 Mack P/N: 20559242

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Fan Clutch Output Power Relay Operation:

The fan clutch output is a digital (ON/OFF) drive. Initial condition is all power off. Turning the key
switch on supplies power to the VECU key switch
앫 Output Type: DC current sinking input. As a result, a portion of the VECU “wakes
앫 Output Source: EMS up” and turns on the power relay output which
supplies power to the EMS, ICM and to the rest of
앫 Output Drive (ON) Current: 1.0 amps the VECU.
maximum at 12 volts
앫 Output High (OFF) Voltage: 12-volt supply
앫 Leakage Current: Less than 1 mA The EMS’s only source of power is from the
앫 Load Type: Inductive, nom. 47 mH ± power relay circuit output. When the key switch is
turned off, the VECU holds the power relay output
앫 Resistance: 25.5 ± 1 ohms at 20°C (68°F) on until the software controlled “off time” has
앫 Pull In: 10 volts maximum at 20°C (68°F) elapsed.
앫 Diagnostics: Open/short to ground and short
to Vbatt The circuit must operate to 5.7-volt Vbatt for
12-volt application.
앫 Output Type: DC current sourcing
The fan clutch drive is designed for a fail safe 앫 Output Source: VECU
operation. Any loss of current will cause the fan to 앫 Output Drive (ON) Current: Capable of
turn on. The fan turns off when the system sinks driving one Type-2 relay over the supply
the supply current through the fan solenoid. voltage range
앫 Output High (LOW) Voltage: Ground supply
Power Relay Driver 앫 Leakage Current: Less than 0.5 mA
앫 Error Detection: Engine ECU fault if the
The power relay driver works together with the switched power does not turn off after six
key switch input and starter input to provide a seconds.
specified power interlock (described below).
Type-2 Relay Characteristics
Control Logic of the Power Relay System:
앫 Resistance: 90 ohms at 25°C (77°F)
앫 Delays turning off the power (Vpwr) to the
EMS, ICM and VECU after the key switch is 앫 Load Type: Inductive, 340 to 585 mH
turned off. The feature allows pertinent data 앫 Pull-in Volts: 7.2 volts at 23°C (73°F)
to be moved into permanent storage, as well
as permitting after-run diagnostic tests. 앫 Dropout Volts: 1.2 volts

앫 Ensures that the fuel injectors will not

operate when the key switch is off.

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Unit Injector Outputs

V-MAC IV contains six unit injector outputs. The
six outputs allow the system to control the fuel
supply and engine timing.
앫 Output Type: High and low-side drives
앫 Output Source: EMS
앫 Output Drive Voltage: Max = 60 volts
앫 Output Drive (ON) Current: 15 amps pull in
(typical)
앫 Leakage Current: Less than 0.5 mA
앫 Load Type: Inductive
앫 Minimum Coil Operating Voltage: 8 volts
앫 Mack P/N: 20702362

The system will not operate below 8-volt supply

voltage.

앫 Diagnostics:
— Open/short to ground detection, each
injector, both sides
— Short to Vbatt, each injector, both sides
— Mechanically not responding properly

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DIAGNOSTICS AND FAULT A list of possible fault codes appears on the

following pages. Current-production vehicles
CODES support MID 128 (engine controller), MID 140
(instrument cluster controller) and MID 144
The V-MAC IV system continuously monitors (vehicle controller). Abbreviations that appear in
itself and other components, including sensors the “Failure” column in the following charts are
and associated wiring and connectors. If a fault is described in the “Notes on Diagnostic Codes.”
detected, the module illuminates the electronic For troubleshooting, please refer to the V-MAC®
indicator light on the dash and marks the fault as IV Service Manual, 8-213.
active.
ELECTRICAL FAULTS FOR ENGINE MANAGEMENT SYSTEM (MID 128)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
PID 26 3 Fan Speed MS, SC+M, Broken Sensor/ Higher fuel Fault tracing elect.
SC−M, OCM, sensor/ Harness consumption, will circuit, including wires
OCG Harness work as on/off fan; and components.
100% fan speed if For E-Viscous fan
cooling is needed. only.
PID 45 3 Preheat SC+ Preheat Preheat relay Preheat relay never Fault tracing electrical
Relay relay activated. White circuit, including wires
solenoid smoke for cold and components
shorted start. Start
problems in cold
climate.
4 SC– Harness Harness Induction air is hot. Fault tracing electrical
Preheat relay is circuit, including wires
impossible to turn and components.
off.
YELLOW lamp.
5 OC Harness or Harness Preheat relay never Fault tracing electrical
Preheat Preheat relay activated. White circuit, including wires
relay smoke for cold and components.
solenoid start. Start
problems in cold
climate.

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ELECTRICAL FAULTS FOR ENGINE MANAGEMENT SYSTEM (MID 128) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
PID 81 0 DPF Diff Mod high None None Power loss.
Pressure pressure
(Catalyzed
0 DPF) Critically high None None Power loss.
pressure RED lamp.
2 Plausibility Sensor is Sensor/ None
not rational Harness YELLOW lamp.
3 SC+M, OCG Sensor/ Sensor/ None Fault tracing electrical
Harness Harness YELLOW lamp. circuit, including wires
and components.
5 OC5S, SC– Sensor/ Sensor/ None Fault tracing electrical
M, OCM Harness Harness YELLOW lamp. circuit, including wires
and components.
12 Filter Particulate DPF filter is
trap filter damaged, filled
with soot or
missing.
YELLOW lamp.
PID 81 0 DPF Diff Too high Excessive Ceased
Pressure differential regeneration.
(Non- pressure YELLOW lamp.
Catalyzed out of range
DPF)
2 Out of range Particulate None.
differential YELLOW lamp.
pressure
out of range
3 SCH YELLOW lamp.
4 SCL YELLOW lamp.
7 Missing filter Missing Ceased
filter regeneration.
YELLOW lamp.
PID 84 9 Vehicle MS from J1708 VECU Engine de-rate. Fault tracing data link
(Road) Spd VECU vehicle system circuit J1708,
speed including involved
message electronic control
does not units.
exist
(VECU
error).
PID 85 9 Cruise Ctrl MS from CC No clutch VECU Cruise control does Fault tracing data link
Status info to system not work. circuit J1939,
EMS/J1939. including involved
electronic control
units.
PID 91 9 Pedal MS from J1708 VECU None Fault tracing data link
Message VECU pedal info system circuit J1939,
not including involved
available. electronic control
units.

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ELECTRICAL FAULTS FOR ENGINE MANAGEMENT SYSTEM (MID 128) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
PID 94 1 Fuel Pressure High diff Filter/Sensor Fuel injection can
Pressure critically low pressure be affected.
over filter. YELLOW lamp.
Leakage.
3 SC+M, OCG Sensor/ Sensor/ None Fault tracing electrical
Harness Harness YELLOW lamp. circuit, including wires
and components.
5 OC5S, SC– Sensor/ Sensor/ None Fault tracing electrical
M, OCM Harness Harness YELLOW lamp. circuit, including wires
and components.
7 Low pressure High Filter/Sensor Fuel injection can Fault tracing fuel
differential be affected. supply system. Fuel
pressure YELLOW lamp. filter, fuel lines, fuel
over filter. pump, pre-filter,
Leakage. sensor, etc.
PID 97 3 Water in Fuel SC+M Harness Harness Undetected water Fault tracing electrical
Sensor in fuel can lead to circuit, including wires
engine stop. and components.
YELLOW lamp.
4 SC–M Harness Harness Will give water in Fault tracing electrical
fuel indication. circuit, including wires
YELLOW lamp. and components.

5 OC None Harness
14 Priming pump No error; None None Maybe deactivated in
active (no used for part dataset. Needed
error) indication only on vehicles with
that the ICM older than IC05.
priming ICM ICO5 and newer
pump is uses PPID 313 for
active. priming indication.
PID 98 1 Oil level Mod below Low oil None None Check oil level.
range level/ YELLOW lamp. Check sensor
Leakage condition.
1 Critically Critically None None
below range low oil level/ RED lamp.
Leakage
4 SC–pos Sensor/ Sensor/ Oil level cannot be Fault tracing electrical
Harness Harness measured. circuit, including wires
YELLOW lamp. and components.

5 SC+pos, Sensor/ Sensor/ Oil level cannot be Fault tracing electrical

OCpos, Harness Harness measured. circuit, including wires
OCneg YELLOW lamp. and components.

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ELECTRICAL FAULTS FOR ENGINE MANAGEMENT SYSTEM (MID 128) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
PID 100 1 Oil Pressure Critically Oil leakage, Oil system Low pressure,
below range broken oil power loss.
pump, RED lamp.
clogged oil
system
3 SC+M, OCG Sensor/ Sensor/ Oil pressure shows Fault tracing electrical
Harness Harness 0 in the cluster. Eng circuit, including wires
is running. and components.
YELLOW lamp.
5 OC5S, SC– Sensor/ Sensor/ Oil pressure shows Fault tracing electrical
M, OCM Harness Harness 0 in the cluster. Eng circuit, including wires
is running. and components.
YELLOW lamp.
PID 102 0 Boost Moderately VGT stuck, VGT turbo, Intermittent
Pressure above range Wastegate Wastegate powerloss.
stuck
2 Incorrect The boost Harness/ Power loss, black
pressure Sensor smoke.
sensor YELLOW lamp.
output is
showing too
high or too
low value
(abnormal
value).
3 SC+M, OCG Connectors, Connectors, Power loss P3137: Fault trace:
harness, or harness, or EGR valve closed connectors, harness,
sensor sensor power loss (major). and sensor.
YELLOW lamp.
5 OC5S, SC– Connectors, Connectors, Power loss P3137: Fault trace:
M, OCM harness, or harness, or EGR valve closed connectors, harness,
sensor sensor power loss (major). and sensor.
YELLOW lamp.
11 Incorrect The boost Harness, Power loss, black
pressure sensor, Inlet smoke.
sensor air leakage
output is
showing too
high or too
low value
(abnormal
value).

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ELECTRICAL FAULTS FOR ENGINE MANAGEMENT SYSTEM (MID 128) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
PID 103 0 Turbo Speed Rate of Mis-detection Connectors, Intermittent high Fault trace:
increase harness, or turbo speed. connectors, harness
turbo speed sensor Intermittent power and sensor.
too high loss (minor).
BLUE lamp.
1 Rate of Mis-detection Connectors, Intermittent low Fault trace:
decrease harness, or turbo speed. connectors, harness
turbo speed sensor BLUE lamp. and sensor.
too big
9 Missing Connector, Connectors, Loss of power, as a Fault trace:
sensor signal harness, harness, or result of restricted connectors, harness
(SC+, SC–, turbo speed sensor VGT position, may and sensor.
OC) sensor affect the whole
(MS, engine speed
SC+M, SC– range.
M, OCM, BLUE lamp.
OCH)

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ELECTRICAL FAULTS FOR ENGINE MANAGEMENT SYSTEM (MID 128) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
PID 105 2 Boost Temp Incorrect The boost Harness, YELLOW lamp.
temperature boost temp
sensor sensor,
output is ambient air
showing temperature
either too sensor
high or too
low value
(abnormal
value).
4 SC–M Connectors, Connectors, Engine is running Fault trace:
harness, harness, but could be connectors, harness,
sensor sensor difficult to start in sensor.
cold climate. EGR
valve closed. Cold
engine: smoke
(minor) or power
loss (minor).
Warm engine:
None
YELLOW lamp.
5 SC+M, OC Connectors, Connectors, Engine is running Fault trace:
harness, harness, but could be connectors, harness,
sensor sensor difficult to start in sensor.
cold climate. EGR
valve closed. Cold
engine: smoke
(minor) or power
loss (minor).
Warm engine:
None
YELLOW lamp.
10 Stuck The boost Harness, YELLOW lamp.
temperature sensor
sensor
output is
showing
constant
value.
PID 108 2 Ambient Air Plausibility The Power loss Sensor/EECU
Pressure ambient air (minor) YELLOW lamp.
pressure is P3524: Black
showing an smoke
abnormal (minor)
value (too
low or too
high).
3 SC+M Internal None Sensor/EECU
fault in YELLOW lamp.
EECU
4 SC–M Internal None Sensor/EECU
fault in YELLOW lamp.
EECU

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ELECTRICAL FAULTS FOR ENGINE MANAGEMENT SYSTEM (MID 128) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
PID 110 0 Coolant Moderately Extreme Extreme Power loss Fault tracing coolant
Temp above range driving driving YELLOW lamp. system.
conditions conditions,
coolant
thermostat,
fan, blocked
radiator
0 Critically Extreme Extreme Power loss
above range driving driving RED lamp.
conditions conditions,
coolant
thermostat,
fan, blocked
radiator
2 Plausibility The coolant Harness/ In some cases can
temperature Sensor have an effect on
sensor output drivability.
is showing an YELLOW lamp.
abnormal
value (too low
or too high).
4 SC–M Sensor/ Sensor/ Engine is difficult to Fault tracing electrical
Harness Harness start. Idle run circuit, including wires
regulation is and components.
deteriorated.
YELLOW lamp.
5 SC+M, OC Sensor/ Sensor/ Engine is difficult to Fault tracing electrical
Harness Harness start. Idle run circuit, including wires
regulation is and components.
deteriorated.
YELLOW lamp.
10 Stuck The coolant Harness/ Can in some cases
temperature Sensor have an effect on
sensor output drivability.
is showing YELLOW lamp.
constant
value.

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ELECTRICAL FAULTS FOR ENGINE MANAGEMENT SYSTEM (MID 128) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
PID 111 1 Coolant Level SC–M, Coolant Coolant Power loss Check coolant level.
Critically level below system RED lamp. Fault tracing electrical
below Range range; if not circuit, including wires
below and components.
range,
harness.
3 SC+M Harness Harness Coolant level Fault tracing electrical
cannot be circuit, including wires
detected. and components.
YELLOW lamp.
4 SC–M Harness Harness Coolant level Fault tracing electrical
cannot be circuit, including wires
detected. and components.
YELLOW lamp.
5 OC Harness Harness Coolant level Fault tracing electrical
cannot be circuit, including wires
detected. and components.
YELLOW lamp.
PID 153 0 Crankcase ILL_MAX Sensor out Sensor None
Pressure of range YELLOW lamp.
0 Critically The e.g. Blow-by Forced idle. Engine (The fault code will
Above Range non-filtered at piston ring. shut down remain during the
pressure NOT RED lamp. entire driving cycle,
difference crankcase unless reset.)
(between pressure
crankcase sensor or
pressure ambient air
and pressure
ambient air sensor.
pressure)
is/was
above limit.
1 ILL_MIN Sensor out Sensor None
of range YELLOW lamp.
2 Plausibility The Harness/ None
crankcase Sensor YELLOW lamp.
pressure is
showing an
abnormal
value (too
low or too
high).
3 SC+M, OCG Sensor/ Sensor/ None Fault tracing electrical
Harness Harness YELLOW lamp. circuit, including wires
and components.
5 SC+M, OCG Sensor/ Sensor/ None Fault tracing electrical
Harness Harness YELLOW lamp. circuit, including wires
and components.

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ELECTRICAL FAULTS FOR ENGINE MANAGEMENT SYSTEM (MID 128) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
PID 158 3 Battery Too high Generator/ Generator/ Possible damage Check battery status.
Voltage External External on EMS system Check charge system.
Charger Charger components
depending on the
high voltage
(>36V).
4 Too low Generator/ Generator/ Possible loss of Check battery status.
Battery Battery start functionality. Check charge system.
PID 171 2 Ambient Air No signal J1708 and Harness/ None.
Temp from CAN or CAN Cluster YELLOW lamp.
J1708 ambient air
temp
message
does not
exist
9 Ambient Air Missing or J1708 Harness/ None Fault tracing data link
Temp lost signal ambient air Cluster YELLOW lamp. circuit J1708,
from ICM temperature including involved
message electronic control
does not units.
exist.
PID 173 0 Exhaust Gas Critically None None Power loss
Temp above range
(Catalyzed
0 Moderately None None Power loss
DPF)
above range
2 Plausibility Sensor not Sensor Regeneration not
rational possible.
YELLOW lamp.
4 SC–M Sensor/ Sensor/ Regeneration not Fault tracing electrical
Harness Harness possible. circuit, including wires
YELLOW lamp. and components.

5 SG+M, OCM, Sensor/ Sensor/ Regeneration not Fault tracing electrical

OCG Harness Harness possible. circuit, including wires
YELLOW lamp. and components.

10 Stuck. Sensor is Sensor Regeneration not

stuck. possible.
YELLOW lamp.
PID 173 2 Exhaust Gas Plausibility Sensor not Sensor Regeneration not
Temp (Non- rational possible.
Catalyzed YELLOW lamp.
DPF)
3 SCH
4 SCL Sensor/ Sensor/ Regeneration not Fault tracing electrical
Harness Harness possible. circuit, including wires
YELLOW lamp. and components.

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ELECTRICAL FAULTS FOR ENGINE MANAGEMENT SYSTEM (MID 128) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
PID 175 0 Oil Temp Moderately Extreme Extreme Power loss Fault tracing cooling
above range driving driving YELLOW lamp. system.
conditions conditions;
Fan, oil
thermostat,
coolant
system,
clogged oil
cooler
0 Critically Extreme Extreme Power loss
above range driving driving RED lamp.
conditions conditions;
fan, oil
thermostat,
coolant
system,
clogged oil
cooler
2 Plausibility Temp too None None
high or too
low
4 SC–M Sensor/ Sensor/ None Fault tracing electrical
Harness Harness YELLOW lamp. circuit, including wires
and components.
5 SC+M, OC Sensor/ Sensor/ None Fault tracing electrical
Harness Harness YELLOW lamp. circuit, including wires
and components.
PID 177 0 Trans Oil Above range YELLOW lamp.
Temp
0 Above range Trans Trans oil YELLOW lamp if
cooler temperature > 154°C (309.2°F);
failure, RED lamp if
cooling > 160°C.
system Zero % reduction at
problem. 154°C (309°F); 2%
of full de-rate at
160°C (320°F); 5%
of full de-rate at
162°C (323.6°F)
with optional
shutdown.

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ELECTRICAL FAULTS FOR ENGINE MANAGEMENT SYSTEM (MID 128) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
PID 224 2 Immobilizer Incorrect data EMS and Immobilizer The engine cannot
from Immobilizer system be started.
immobilizer (or Cluster) YELLOW lamp.
unit security
codes do
not match.
12 No response Immobilizer Immobilizer The engine cannot
from unit system be started.
immobilizer installed. YELLOW lamp.
(When
Immobilizer
in Cluster is
used, the
Cluster
maybe did
not wake up
properly).
PID 228 11 Calibration MS from J1708 VECU Wrong trip data. Fault tracing data link
Factor (K) VECU calibration system circuit J1708,
factor including involved
message ECUs.
does not
exist
(VECU
error).
PID 245 9 Total Veh MS from ICM J1708 total VECU None Fault tracing data link
Distance vehicle system circuit J1708,
distance including involved
message ECUs.
does not
exist
(VECU
error).
PID 251 9 Time Data Timed out J1708 time Cluster Timestamps from Fault tracing data link
Failure data failure Cluster not circuit J1708,
message available. including involved
does not YELLOW lamp. ECUs.
exist
(Cluster
error).
PID 252 9 Date Data Timed out J1708 time Cluster Timestamps from Fault tracing data link
Failure data failure Cluster not circuit J1708,
message available. including involved
does not ECUs.
exist
(Cluster
error).

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ELECTRICAL FAULTS FOR ENGINE MANAGEMENT SYSTEM (MID 128) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
PID 354 3 Relative Air SC+M, OCG Faulty Connector, Condensation Fault trace connector,
Humidity connector, harness, control harness, sensor.
harness, sensor compromised.
sensor Possible turbo
noise.
BLUE lamp.
5 OCM, OC5V, Faulty Connector, Condensation Fault trace connector,
SC–M connector, harness, control harness, sensor.
harness, sensor compromised.
sensor Possible turbo
noise.
BLUE lamp.
PID 404 0 Compressor Critically too Excessive High ambient Power reduction. DTC is explanation for
Discharge high inlet temp temperature, de-rate, typically
Temp low ambient caused by abnormal
pressure, usage (high altitude
turbo and temperature).
compressor
inlet duct
allowing
under hood
air to enter
compressor.

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ELECTRICAL FAULTS FOR ENGINE MANAGEMENT SYSTEM (MID 128) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
PID 411 3 EGR Diff SC+M, OCG Sensor/ Connector, Possible response Fault trace connector,
Pressure Harness harness, problem. harness, sensor.
sensor Possible de-rate.
YELLOW lamp.
5 OC5S, SC– Sensor/ Connector, Possible response Fault trace connector,
M, OCM Harness harness, problem. harness, sensor.
sensor Possible de-rate.
YELLOW lamp.
7 Mechanical EGR valve Connector, Regeneration not
too open or harness, possible.
too closed sensor, EGR YELLOW lamp.
valve,
clogged
Venturi
12 Incorrect high The EGR Connector, None. Uneven Use VCADS to read
diff harness, engine running. out sensor value on
pressure sensor, EGR Possible de-rate. J1587 when engine is
sensor leakage off. Expected value =
output is (TBD), YELLOW lamp. 0 kPa. Fault trace
showing an clogged EGR suspected
abnormal cooler (TBD), components.
value (too clogged
low or too Venturi.
high).
14 Incorrect low The EGR Connector, None. Uneven Use VCADS to read
diff harness, engine running. out sensor value on
pressure sensor, EGR Possible de-rate. J1587 when engine is
sensor leakage off. Expected value =
output is (TBD), YELLOW lamp. 0 kPa. Fault trace
showing an clogged EGR suspected
abnormal cooler (TBD), components.
value (too clogged
low or too Venturi.
high).

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ELECTRICAL FAULTS FOR ENGINE MANAGEMENT SYSTEM (MID 128) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
PID 412 0 EGR Temp Above range Extreme Power loss. Extreme driving
Aftercooler driving None conditions; EGR
conditions; cooler.
EGR cooler YELLOW, RED, or
NO lamp.
4 SC–M Connector, Possible Connector, Fault trace connector,
harness, response harness, sensor. harness, sensor.
sensor problem. YELLOW lamp.
Possible
de-rate.
5 SC+M, OCM, Connector, None. Connector, Fault trace connector,
OCG harness, Possible harness, sensor. harness, sensor.
sensor de-rate. YELLOW lamp.
10 Stuck The EGR None TBD Use VCADS to read
temperature YELLOW lamp. out sensor value on
sensor J1587 when engine is
output is off and cold. Expected
showing value = Ambient temp.
constant Fault trace suspected
value. components.
PPID 55 4 ECU Temp SC−M Internal EECU None Replace control unit.
fault in
EECU
5 SC+M, OC Internal EECU None Replace control unit.
fault in
EECU
PPID 89 0 VTG SRA Mod too high Extreme Coolant Power loss (major) Fault search: Coolant
Temp driving system; (25% de-rate per system Overheated
conditions; Overheated second during 4s VGT actuator.
coolant VGT –> 100% de-rate).
system; actuator. YELLOW lamp.
Overheated
VGT
actuator.

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ELECTRICAL FAULTS FOR ENGINE MANAGEMENT SYSTEM (MID 128) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
PPID 122 1 PowerLeash™ Below range Low engine No PowerLeash™
Brake oil temp Brake.
BLUE lamp.
3 SC+ Broken Compression PowerLeash™ Fault tracing electrical
actuator/ brake Brake cannot be circuit, including wires
Harness actuator turned on. Engine and components.
break function
de-rated. Gear shift
performance
de-rated for some
automatic
transmission
boxes.
YELLOW lamp.
4 SC– Broken Compression PowerLeash™ Fault tracing electrical
actuator/ brake Brake cannot be circuit, including wires
Harness actuator turned off. Causes and components.
engine to stop.
Engine impossible
to restart.
YELLOW lamp.
5 OC Broken Compression PowerLeash™ Fault tracing electrical
actuator/ brake Brake cannot be circuit, including wires
Harness actuator turned on. Engine and components.
break function
de-rated. Gear shift
performance
de-rated for some
automatic
transmission
boxes.
YELLOW lamp.

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ELECTRICAL FAULTS FOR ENGINE MANAGEMENT SYSTEM (MID 128) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
PPID 270 2 NOx Sensor Removed Sensor Sensor None
removed YELLOW lamp.
(measures
surrounding
air)
2 Plausibility Excessive Excessive
urea dosing urea dosing
(only SCR (only for SCR
system); system);
exhaust exhaust
system system
leakage; air leakage; air
intake intake
leakage; leakage;
NOx-sensor NOx-sensor
3 SC NOx Cabling NOx-sensor Fault tracing electrical
signal between cabling; circuit, including wires
NOx-sensor Nox-sensor and components.
and
NOx-sensor
ECU;
NOx-sensor
5 OC NOx Cabling NOx-sensor Fault tracing electrical
signal between cabling; circuit, including wires
NOx-sensor NOx-sensor and components.
and
NOx-sensor
ECU;
NOx-sensor
9 Abnormal Ms from NOx-sensor
update NOx-sensor power supply.
ECU CAN
communication
between EMS
and NOx-ECU.
10 Stuck Exhaust Exhaust
system system; air
leakage; air intake
intake system;
leakage; NOx-sensor
NOx-sensor
12 Incorrect Sensor Sensor
value
13 Range check Sensor Sensor
14 MS from Too high of Battery
sensor due to a voltage to voltage
Vbatt NOx-sensor
ECU

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ELECTRICAL FAULTS FOR ENGINE MANAGEMENT SYSTEM (MID 128) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
PPID 272 4 Air Temp for SC– Faulty Fault trace Possible turbo Fault tracing electrical
Humidity connector, connector, noise. circuit, including wires
Compensation harness, harness, YELLOW lamp. and components.
sensor sensor
5 SC+, OC Faulty Fault trace Possible turbo Fault tracing electrical
connector, connector, noise. circuit, including wires
harness, harness, YELLOW lamp. and components.
sensor sensor
PPID 326 0 Soot Level Moderately High soot DPF, injector De-rate Manual regeneration
high soot load in DPF AHI clogged YELLOW lamp. needed.
load
11 Critically high High soot DPF, injector Shutdown Replace or clean DPF.
soot load load in DPF AHI clogged RED lamp.
14 Ash level too BLUE lamp. Service required.
high
PPID 328 3 After SCH Actuator/ Actuator/ Regeneration not Fault tracing electrical
Treatment Harness Harness possible. circuit, including wires
Injection YELLOW lamp. and components.
Shutoff Valve
4 (Catalyzed SCL Actuator/ Injector/ Regeneration not Fault tracing electrical
DPF) Harness Harness possible. circuit, including wires
YELLOW lamp. and components.

5 OC Actuator/ Injector/ Regeneration not Fault tracing electrical

Harness Harness possible. circuit, including wires
YELLOW lamp. and components.

7 Stuck close Shutoff Shutoff valve Regeneration not

valve stuck possible.
YELLOW lamp.
14 Leakage Shutoff Shutoff valve Regeneration not
valve possible.
leakage YELLOW lamp.
PPID 328 3 After SCH Actuator/ Actuator/ Regeneration not
Treatment Harness Harness possible.
Injection YELLOW lamp.
Shutoff Valve
4 (Non- SCL Actuator/ Actuator/ Regeneration not
Catalyzed Harness Harness possible.
DPF) YELLOW lamp.
PPID 329 3 After SCH Actuator/Ha Injector/ Regeneration not Fault tracing electrical
Treatment rness Harness possible. circuit, including wires
Fuel Injector YELLOW lamp. and components.
(Catalyzed
4 DPF) SCL Actuator/Ha Injector/ Regeneration not Fault tracing electrical
rness Harness possible. circuit, including wires
YELLOW lamp. and components.

5 OC Actuator/Ha Injector/ Regeneration not Fault tracing electrical

rness Harness possible. circuit, including wires
YELLOW lamp. and components.

14 Leakage Injector is Injector Regeneration not

leaking. possible.
YELLOW lamp.

Page 71
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ELECTRICAL FAULTS FOR ENGINE MANAGEMENT SYSTEM (MID 128) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
PPID 329 3 After SCH Actuator/ Aborted and
Treatment Connector/ ceased
4 SCL
Fuel Injector Harness regeneration.
(Non- YELLOW lamp.
Catalyzed
DPF)
PPID 330 3 Discharge SC+ Connectors, Connectors, On/off valve can't Fault trace
Recirculator harness, harness, be activated. connectors, harness,
Valve actuator solenoid Regeneration not solenoid valve.
Solenoid valve possible.
High engine
braking without
request.
Drivability affected.
YELLOW lamp.
4 SC– Connectors, Connectors, Valve constantly Fault trace
harness, harness, activated. connectors, harness,
actuator solenoid Major power loss. solenoid valve.
valve Major smoke.
Exhaust manifold
overheating.
Engine shut down.
YELLOW lamp.
5 OC Connectors, Connectors, On/off valve can't Fault trace
harness, harness, be activated. connectors, harness,
actuator solenoid Regeneration not solenoid valve.
valve possible.
High engine
braking without
request.
Drivability affected.
YELLOW lamp.
7 Mechanically Leaking Leaking On/off valve can't Fault trace pipes,
stuck pipes, pipes, be activated. solenoid valve, and
solenoid solenoid Regeneration not valve.
valve, valve valve, valve possible.
High engine
braking without
request.
Drivability affected.
Valve constantly
activated.
Major power loss.
Major smoke.
Exhaust manifold
overheating.
Engine shut down.
YELLOW lamp.
PPID 333 3 Engine Fan SC+ YELLOW lamp.
4 Thermal SC– YELLOW lamp.
Switch
5 OC YELLOW lamp.

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ELECTRICAL FAULTS FOR ENGINE MANAGEMENT SYSTEM (MID 128) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
PPID 337 0 Ash Level in Ash level too Need Short intervals
DPF high service between filter
(Catalyzed regeneration.
DPF) YELLOW lamp.
PPID 337 14 Ash Level in Special Need None. Component
DPF instruction service YELLOW lamp. maintenance required.
(Non-Catalyz
ed DPF)
PPID 340 3 Supplemental SCH YELLOW lamp.
Air Valve
4 (Non- SCL
Catalyzed
DPF)
PPID 387 2 Exhaust Gas Plausibility Sensor not Sensor Regeneration not
Temp Sensor rational possible.
#2 YELLOW lamp.
(Catalyzed
4 DPF) SC–M Sensor/ Sensor/ Regeneration not Fault tracing electrical
Harness Harness possible. circuit, including wires
YELLOW lamp. and components.

5 SC+M, OCM, Sensor/ Sensor/ Regeneration not Fault tracing electrical

OCG Harness Harness possible. circuit, including wires
YELLOW lamp. and components.

10 Stuck Sensor is Sensor Regeneration not

stuck. possible.
YELLOW lamp.
PPID 436 0 Exhaust Gas Too high Regeneration None
Temp Sensor temp too high
#3
2 Plausibility Sensor not Sensor Regeneration not
(Catalyzed
rational possible.
DPF)
4 SC–M Sensor/ None Sensor/Harness Fault tracing electrical
Harness circuit, including wires
and components.
5 SC+M, OCM, Sensor/ None Sensor/Harness Fault tracing electrical
OCG Harness circuit, including wires
and components.
10 Stuck Sensor is Sensor Regeneration not
stuck. possible.
PPID 436 0 Filter Inlet Too high Ceased
Temperature multiple times regeneration.
(Non- YELLOW lamp.
Catalyzed
2 DPF) Plausibility YELLOW lamp.
3 SCH YELLOW lamp.
4 SCL YELLOW lamp.
14 Too high Aborted
regeneration.
NO lamp.

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ELECTRICAL FAULTS FOR ENGINE MANAGEMENT SYSTEM (MID 128) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
PPID 437 2 After Plausibility Sensor is Sensor, Regeneration not
Treatment not rational. shutoff valve possible.
Injector Fuel YELLOW lamp.
Pressure
3 SC+M, OCG Sensor/ Sensor/ Regeneration not Fault tracing electrical
Harness Harness possible. circuit, including wires
YELLOW lamp. and components.

5 OC5S, Sensor/ Sensor/ Regeneration not Fault tracing electrical

SC–M, OCM Harness Harness possible. circuit, including wires
YELLOW lamp. and components.

10 Stuck Sensor is Sensor, Regeneration not

stuck. shutoff valve, possible.
injector
PPID 440 1 Flame Temp Multiple lost Ceased
(Non- flames regeneration.
Catalyzed YELLOW lamp.
DPF)
2 Plausibility Ceased
regeneration.
YELLOW lamp.
3 SCH Ceased
regeneration.
YELLOW lamp.
4 SCL Ceased
regeneration.
YELLOW lamp.
14 Lost flame Aborted
regeneration.
NO lamp.
PPID 442 3 Cold Junction SCH NO lamp.
Temperature
4 SCL
(Non-
Catalyzed
DPF)

Page 74
 VENDOR APPLICATION GUIDE V-MAC IV 07 EMISSIONS STD.

ELECTRICAL FAULTS FOR ENGINE MANAGEMENT SYSTEM (MID 128) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
SID 1 3 Injector 1 SC+, Low Harness Harness Loss of power and Fault tracing electrical
Side SV/NCV shorted uneven running. circuit, including wires
Run on three to five and components.
cylinders.
YELLOW lamp.
5 SC+, SC–, Harness/ Injector/ Loss of power and Fault tracing electrical
OC, High Broken Harness uneven running. circuit, including wires
Side solenoid Run on three to five and components.
SV/NCV; cylinders.
SC–, Low YELLOW lamp.
Side SV/NCV
7 Out of Low or high Injector, see Larger errors can
calibration flow injector; Probable be noticeable at
bad Error. engine idle speed.
compression YELLOW lamp.
12 Low injector Injector/ Injector/ YELLOW lamp.
hold current Harness Harness
resistance
too high
SID 2 3 SC+, Low Harness Harness Loss of power and Fault tracing electrical
Side SV/NCV shorted uneven running. circuit, including wires
Run on three to five and components.
cylinders.
YELLOW lamp.
5 SC+, SC–, Harness/ Injector/ Loss of power and Fault tracing electrical
OC, High Broken Harness uneven running. circuit, including wires
Side solenoid Run on three to five and components.
SV/NCV; cylinders.
SC–, Low YELLOW lamp.
Side SV/NCV
7 Out of Low or high Injector, see Larger errors can
calibration flow injector; Probable be noticeable at
bad Error. engine idle speed.
compression YELLOW lamp.
12 Low injector Injector/ Injector/ YELLOW lamp.
hold current Harness Harness
resistance
too high

Page 75
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ELECTRICAL FAULTS FOR ENGINE MANAGEMENT SYSTEM (MID 128) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
SID 3 3 Injector 3 SC+, Low Harness Harness Loss of power and Fault tracing electrical
Side SV/NCV shorted uneven running. circuit, including wires
Run on three to five and components.
cylinders.
YELLOW lamp.
5 SC+, SC−, Harness/ Injector/ Loss of power and Fault tracing electrical
OC, High Broken Harness uneven running. circuit, including wires
Side solenoid Run on three to five and components.
SV/NCV; cylinders.
SC−, Low YELLOW lamp.
Side SV/NCV
7 Out of Low or high Injector, see Larger errors can
calibration flow injector; Probable be noticeable at
bad Error. engine idle speed.
compression YELLOW lamp.
12 Low injector Injector/ Injector/ YELLOW lamp.
hold current Harness Harness
resistance
too high
SID 4 3 Injector 4 SC+, Low Harness Harness Loss of power and Fault tracing electrical
Side SV/NCV shorted uneven running. circuit, including wires
Run on three to five and components.
cylinders.
YELLOW lamp.
5 SC+, SC−, Harness/ Injector/ Loss of power and Fault tracing electrical
OC, High Broken Harness uneven running. circuit, including wires
Side solenoid Run on three to five and components.
SV/NCV; cylinders.
SC−, Low YELLOW lamp.
Side SV/NCV
7 Out of Low or high Injector, see Larger errors can
calibration flow injector; Probable be noticeable at
bad Error. engine idle speed.
compression YELLOW lamp.
12 Low injector Injector/ Injector/ YELLOW lamp.
hold current Harness Harness
resistance
too high

Page 76
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ELECTRICAL FAULTS FOR ENGINE MANAGEMENT SYSTEM (MID 128) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
SID 5 3 Injector 5 SC+, Low Harness Harness Loss of power and Fault tracing electrical
Side SV/NCV shorted uneven running. circuit, including wires
Runs on three to and components.
five cylinders.
YELLOW lamp.
5 SC+, SC–, Harness/ Injector/ Loss of power and Fault tracing electrical
OC, High Broken Harness uneven running. circuit, including wires
Side solenoid Runs on three to and components.
SV/NCV; five cylinders.
SC–, Low YELLOW lamp.
Side SV/NCV
7 Out of Low or high Injector, see Larger errors can
calibration flow injector; Probable be noticeable at
bad Error. engine idle speed.
compression YELLOW lamp.
12 Injector 5 Low injector Injector/ Injector/ YELLOW lamp.
hold current Harness Harness
resistance
too high
SID 6 3 Injector 6 SC+, Low Harness Harness Loss of power and Fault tracing electrical
Side SV/NCV shorted uneven running. circuit, including wires
Runs on three to and components.
five cylinders.
YELLOW lamp.
5 SC+, SC–, Harness/ Injector/ Loss of power and Fault tracing electrical
OC, High Broken Harness uneven running. circuit, including wires
Side solenoid Runs on three to and components.
SV/NCV; five cylinders.
SC–, Low YELLOW lamp.
Side SV/NCV
7 Out of Low or high Injector, see Larger errors can
calibration flow injector; Probable be noticeable at
bad Error. engine idle speed.
compression YELLOW lamp.
12 Low injector Injector/ Injector/ YELLOW lamp.
hold current harness Harness
resistance
too high

Page 77
 VENDOR APPLICATION GUIDE V-MAC IV 07 EMISSIONS STD.

ELECTRICAL FAULTS FOR ENGINE MANAGEMENT SYSTEM (MID 128) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
SID 18 3 Water-In- SC+ Broken Water-in-fuel Valve constantly Fault tracing electrical
(for Fuel Valve solenoid, valve driver shut. circuit, including wires
MACK® wire or (either 10 YELLOW lamp. and components.
MP8 EMS driver Amp Driver 2
engines output or A33
only) actuator)
4 SC– Broken Water-in-fuel High fuel Fault tracing electrical
solenoid, valve driver consumption due to circuit, including wires
wire or (either 10 fuel leakage. and components.
EMS driver Amp Driver 2 YELLOW lamp.
output or A33
actuator)
5 OC Broken Water-in-fuel Valve constantly Fault tracing electrical
solenoid or valve driver shut. circuit, including wires
wire (either 10 YELLOW lamp. and components.
Amp Driver 2
or A33
actuator)
SID 21 2 CAM Speed Phase error Bad Engine Fuel consumption Fault tracing electrical
Sensor correlation transmission increased. circuit, including wires
between BLUE lamp. and components.
CAM and Check sensor
crank; condition and
engine installation.
trans not
correct.
3 MS from cam Sensor/ Harness The engine start Fault tracing electrical
sensor (SC+, Harness time will increase. circuit, including wires
SC–, OC) Possible loss of and components.
power. Check sensor
BLUE lamp. condition and
installation.
8 Noisy, OC Harness/ Sensor/ The engine start Fault tracing electrical
Sensor Harness time will increase. circuit, including wires
mounting Possible loss of and components.
power. Check sensor
BLUE lamp. condition and
installation.

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ELECTRICAL FAULTS FOR ENGINE MANAGEMENT SYSTEM (MID 128) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
SID 22 2 Crank Speed Intermittent or Harness/ Sensor/ The engine start Fault tracing electrical
Sensor weak signal Sensor Harness time will increase. circuit, including wires
mounting Engine is running and components.
with imprecise Check sensor
timing causing risk condition and
of high fuel installation.
consumption and
smoke.
Cylinder balancing
not working with
risk of uneven
running.
Possible loss of
power.
YELLOW lamp.
3 MS from Harness/ Sensor/ The engine start Fault tracing electrical
crank sensor Sensor Harness time will increase. circuit, including wires
(SC+, SC–, mounting Engine is running and components.
OC) with imprecise Check sensor
timing causing risk condition and
of high fuel installation.
consumption and
smoke.
Cylinder balancing
not working with
risk of uneven
running.
Possible loss of
power.
YELLOW lamp.
8 Noisy Sensor Sensor/Lack Engine is running Fault tracing electrical
mounting of shims with imprecise circuit, including wires
timing causing risk and components.
of high fuel Check sensor
consumption and condition and
smoke. installation.
Cylinder balancing
not working with
risk of uneven
running.
Possible loss of
power.
YELLOW lamp.

Page 79
 VENDOR APPLICATION GUIDE V-MAC IV 07 EMISSIONS STD.

ELECTRICAL FAULTS FOR ENGINE MANAGEMENT SYSTEM (MID 128) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
SID 27 2 VGT SRA Incorrect CAN2, CAN2, Nozzle opens, low
disturbance disturbance boost, low power,
on CAN2 on CAN 2 no smoke.
no interruption. YELLOW lamp.
interruption.
4 Short to Connectors, Connectors, SRA will continue Fault trace
ground harness, low harness, low to attempt to connectors, harness
battery battery maintain target (CAN2), supply to
voltage voltage nozzle position, or VGT actuator and
nozzle will open VGT actuator.
resulting in low
power and boost.
YELLOW lamp.
7 Mechanical Restriction SRA position Power loss in some Perform calibration.
problem detected is not cases when
when running tracking actuator motor has
learn command. been disabled.
sequence. Actuator Low boost and
SRA position motor effort smoke.
is not tracking temporarily YELLOW lamp.
command. limited to
Actuator prevent
motor effort overheating.
temporarily Slow to follow
limited to the
prevent commands.
overheating.
Slow to follow
the
commands
9 Missing Connectors. Connectors. De-rate (major). Fault trace
signal Harness Harness EGR valve closed. connectors, harness
(CAN2). (CAN2). (CAN2), supply to
YELLOW lamp. VGT actuator and
No supply to No supply to VGT actuator.
VGT VGT
actuator. actuator.
VGT VGT
actuator. actuator.
13 Out of Failed self- SRA None or possible
calibration calibration low boost.
during learn YELLOW lamp.
period.
End
position
control that
is
performed
at every
start has
not been
approved.

Page 80
 VENDOR APPLICATION GUIDE V-MAC IV 07 EMISSIONS STD.

ELECTRICAL FAULTS FOR ENGINE MANAGEMENT SYSTEM (MID 128) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
SID 33 3 Cooling Fan SC+ Broken Actuator/ Fan runs at full Fault tracing electrical
Control actuator, Harness speed. Increased circuit, including wires
wire or fuel consumption and components.
EMS driver may be seen.
output YELLOW lamp.
4 SC– Broken Actuator/ Fan always Fault tracing electrical
actuator, Harness deactivated. circuit, including wires
wire or YELLOW lamp. and components.
EMS driver
output
5 OC Broken Actuator/ Fan runs at full Fault tracing electrical
actuator or Harness speed. Increased circuit, including wires
wire fuel consumption and components.
may be seen.
BLUE lamp.
SID 39 0 Starter Input Starter over The starter None The starter motor is
heated motor is deactivated.
deactivated NO lamp.
due to
overheating.
3 SC+ Start Relay/ Start Relay/ Impossible to Fault tracing electrical
Harness Harness activate starter circuit, including wires
motor. and components.
YELLOW lamp.
5 OC Start Relay/ Start Relay/ Impossible to Fault tracing electrical
Harness Harness activate starter circuit, including wires
motor. and components.
YELLOW lamp.
10 Cogwheel The starter Starter motor The starter motor is
synchronization motor is deactivated.
deactivated NO lamp.
due to
cogwheel
lock.
SID 70 3 Preheat SC+ Sensor wire Preheat Fuse for shorting Fault tracing electrical
Sensor 1 SC+ or sensor 1 wire breaks. circuit, including wires
preheat Preheat relay YELLOW lamp. and components.
relay
broken.
4 SC– Sensor wire Preheat Preheat relay Fault tracing electrical
SC– or sensor 1 problem or sensor circuit, including wires
preheat Preheat relay short circuited (–). and components.
relay YELLOW lamp.
broken.
5 OC Heating Might get start Fault tracing electrical
element or problems in cold circuit, including wires
wire climate. and components.
broken. YELLOW lamp.

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ELECTRICAL FAULTS FOR ENGINE MANAGEMENT SYSTEM (MID 128) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
SID 71 3 Preheat SC+ Sensor wire Preheat Fuse for shorting Fault tracing electrical
Sensor 2 SC+ or sensor 2 wire breaks. circuit, including wires
preheat Preheat relay YELLOW lamp. and components.
relay
broken.
4 SC– Sensor wire Preheat Preheat relay Fault tracing electrical
SC– or sensor 2 problem or sensor circuit, including wires
preheat Preheat relay short circuited (–). and components.
relay YELLOW lamp.
broken.
5 OC Heating Might get start Fault tracing electrical
element or problems in cold circuit, including wires
wire climate. and components.
broken. YELLOW lamp.
SID 146 3 EGR Valve 1 Stuck valve, Broken Harness, Power loss. Fault tracing electrical
(LISK) H-bridge, actuator, EGR valve YELLOW lamp. circuit, including wires
SC+ or SC– wire or and components.
EMS driver See symptoms for
closed and/or open Check actuator
output condition and
valve (TBD).
installation.
5 OC Broken Connector, Power loss (TBD). Fault tracing electrical
actuator or harness, YELLOW lamp. circuit, including wires
wire EGR valve and components.
See symptoms for
closed and/or open Check actuator
valve (TBD). condition and
installation.
SID 211 3 5V Supply 2 Above range Harness, Harness/PID Unexpected Fault tracing electrical
(SC high sensor, 27, PID94, information in circuit, including wires
side) power PID100, cluster. and components.
supply PID153, YELLOW lamp.
PID362
4 Below range Harness, Harness/PID Unexpected Fault tracing electrical
(SC low side) sensor, 27, PID94, information in circuit, including wires
power PID100, cluster. and components.
supply PID153, YELLOW lamp.
PID362
SID 230 3 Buffered Idle SC+ Harness YELLOW lamp. Fault tracing electrical
Validation circuit, including wires
Switch and components.
5 SC–, OC Harness YELLOW lamp. Fault tracing electrical
circuit, including wires
and components.
SID 231 2 CAN1 J1939 SC+, SC– or Harness Harness PTO, cruise control Fault tracing data link
Communication OC on either and engine brake circuit J1939,
Link line do not work. including involved
Torque control from ECUs.
automatic
transmission,
traction control
system and
distance control do
not work.
YELLOW lamp.

Page 82
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ELECTRICAL FAULTS FOR ENGINE MANAGEMENT SYSTEM (MID 128) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
SID 232 3 5V Supply 1 Above range Harness, Harness/ Unexpected Fault tracing electrical
sensor, PID26, information in circuit, including wires
power PID102, cluster. and components.
supply PID132, YELLOW lamp.
PID164,
PID411
4 Below range Harness, Harness/ Unexpected Fault tracing electrical
sensor, PID26, information in circuit, including wires
power PID102, cluster. and components.
supply PID132, YELLOW lamp.
PID164,
PID411
SID 240 2 Programming Check sum No software Software The engine cannot
Memory error download be started.
application RED lamp.
7 Development None None None
SW BLUE lamp.
11 Test cell None None None
mode YELLOW lamp.
12 Programming ECC fault Error on Software, No functionality.
Memory code-part EMS RED lamp.
of flash, or
RAM, or
erased
vendor
area.
SID 253 2 Dataset Check sum The engine cannot Replace ECU.
Memory error be started.
RED lamp.
12 Check sum Damaged RED lamp. Reprogram and/or
error vendor EECU replace ECU.
14 Check sum Loss of log data Replace ECU.
error on E2 and some user
configurable data.
RED lamp.
SID 254 3 RAM RAM The engine cannot Replace ECU.
addressing be started.
failure. RED lamp.
12 Write to RAM The engine cannot Replace ECU.
does not be started.
work. RED lamp.
PSID 22 7 Aftertreatment Multiple failed Ceased
Combustion ignitions regeneration.
System (Non- YELLOW lamp.
Catalyzed
14 DPF) Failed ignition Aborted
regeneration.
NO lamp.

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ELECTRICAL FAULTS FOR ENGINE MANAGEMENT SYSTEM (MID 128) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
PSID 25 0 Aftertreatment Idle timer Vehicle has Engine derate
System critically too idled too active, white
Conditioning high long without smoke, high temp
(Catalyzed completing spikes in DPF upon
DPF) a periodic resuming driving or
heat mode. stationary
regeneration.
RED lamp.
7 Idle timer Vehicle has White smoke, high
moderately idled too temp spikes in DPF
too high long without upon resuming
completing driving or
a periodic stationary
heat mode. regeneration.
YELLOW lamp.
PSID 40 1 Insufficient Critically too FLASHING lamp.
Reagent low
Quality
14 Moderately
too low
PSID 41 1 Too Low Critically low FLASHING lamp.
Reagent
14 Moderately
Consumption
too low
PSID 42 14 Interruption No dosing FLASHING lamp.
of Dosing
Activity

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ELECTRICAL FAULTS FOR ENGINE MANAGEMENT SYSTEM (MID 128) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
PSID 43 2 Incorrect Extreme cold FLASHING lamp.
EGR Flow ambient
temperature
conditions,
PTO
operation with
limited
exhaust
temperatures,
driver
intervention,
DRV, turbo.
14 Extreme cold
ambient
temperature
conditions,
PTO
operation with
limited
exhaust
temperatures,
driver
intervention,
DRV, turbo.
PSID 44 14 Deactivation FLASHING lamp.
of EGR
PSID 45 0 High NOx FLASHING lamp. Root cause unknown
14
PSID 46 2 NOx FLASHING lamp.
Monitoring
14
Failure
PSID 47 0 DPF Plausibility Regen not
Regeneration too high possible.
(Catalyzed YELLOW lamp.
1 Plausibility
DPF)
too low
12 Regeneration Injector Injector, DPF None.
is not efficient clogged, catalyst NO lamp.
clogged or
damage to
DPF
catalyst
PSID 47 7 DPF Mechanical Exhaust pipe Engine Aborted and
Regeneration problem disconnected exhaust pipe. ceased
(Non- before DPF. regeneration.
Catalyzed Reverse Regen not
DPF) exhaust flow possible.
out of DPF YELLOW lamp.
inlet.
8 Excessive NO lamp.
regeneration
period

Page 85
 VENDOR APPLICATION GUIDE V-MAC IV 07 EMISSIONS STD.

ELECTRICAL FAULTS FOR ENGINE MANAGEMENT SYSTEM (MID 128) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
PSID 49 3 Ignition SCH NO lamp.
Switch
4 SCL
Voltage
(Non-
Catalyzed
DPF)
PSID 57 0 Battery Too high Aborted and
Voltage ceased
1 Too low
(Non- regeneration.
Catalyzed YELLOW lamp.
DPF)
3 SCH NO lamp.
4 SCL YELLOW lamp.
PSID 58 3 Master Air SCH YELLOW lamp.
Solenoid
4 SCL Aborted and
ceased
regeneration.
YELLOW lamp.
PSID 59 3 Atomization SCH YELLOW lamp.
and
4 SCL Aborted and
Combustion
ceased
Air Solenoids
(Non- regeneration.
Catalyzed YELLOW lamp.
DPF)
PSID 98 0 Boost Air Too high The Boost EGR system. Turbo surge (worst Fault search EGR
System pressure is Turbo case). system and turbo.
too high. NO lamp.
EGR
system
Turbo
1 Too low Pipes, Inlet air Power loss, black Fault search pipes,
bracket, system smoke, slow bracket, cooler,
cooler, leakage, response. EGR-system, turbo.
turbo, EGR- pipes, NO lamp.
system Bracket,
cooler,
EGR-system,
turbo
PSID 108 7 After Mechanical ATI system AT fuel Regeneration not Fault tracing electrical
Treatment problem injector, AT possible. circuit, including wires
Injection injection, Power loss. and components.
(ATI) System shutoff valve,
AT injection Engine shut down.
fuel pressure
PSID 110 3 Ignition Coil SCH Ceased
(Non- regeneration.
4 Catalyzed SCL
YELLOW lamp.
DPF)

Page 86
 VENDOR APPLICATION GUIDE V-MAC IV 07 EMISSIONS STD.

ELECTRICAL FAULTS FOR ENGINE MANAGEMENT SYSTEM (MID 128) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
PSID 111 3 Fuel Pump SCH YELLOW lamp.
(Non-
4 SCL Aborted and
Catalyzed
DPF) ceased
regeneration.
YELLOW lamp.
PSID 113 0 Sensor Too high Aborted and
Voltage ceased
1 Supply (Non- Too low regeneration.
3 Catalyzed SCH YELLOW lamp.
DPF)
4 SCL
PSID 114 9 DPF Switch Missing Missing Harness NO lamp.
signal signal from
DPF Smart
Switch
12 Bad device
PSID 161 12 VIN Check 1 Bad device No answer EMS does Fueling disabled. This fault code may
from VIN not get VIN Engine start not not be supported in
numbers allowed. the US.
from two
other units YELLOW lamp.
(commonly
VECU and
LCM
M/APM).
Should be
sent in
PID 237.
PSID 162 2 VIN Check 2 Data erratic Incorrect VIN numbers Fueling disabled. This fault code may
answer do not agree Engine start not not be supported in
from VIN in EMS and allowed. the US.
two other
units YELLOW lamp.
(commonly
VECU and
LCM/APM).
PSID 201 9 CAN1 J1939 No contact Missing Harness PTO, cruise control Fault tracing data link
Comm Time with the data from and engine brake circuit J1939,
Out VECU. VECU, do not work including involved
harness. anymore. ECUs.
PSID 202 9 CAN 1 J1939 No contact Missing Harness, None.
Comm Time with MID 140 data from cluster
Out cluster,
harness
PSID 205 9 Transmission MS from ETC2 not None. May be deactivated in
Electronic Transmission responding part data set.
Control Unit ECU
(ECU) Status
PSID 232 2 CAN2 J1939 SC+, SC– or Harness Harness No urea Fault tracing data link
Comm Time OC on either consumption. circuit J1939,
Out line. No VGT control. including involved
ECUs.
Power loss.
YELLOW lamp.

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ELECTRICAL FAULTS FOR ENGINE MANAGEMENT SYSTEM (MID 128) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
PSID 249 9 CAN Frames Time out. CAN cables, CAN cables, No regeneration.
from Thermal connectors, connectors, Thermal
Regeneration Thermal Thermal Regeneration Unit
Unit (Non- Regeneration Regeneration does not start.
Catalyzed Unit module Unit module YELLOW lamp.
DPF)
12 Watchdog Multiple time Aborted and
Timeout outs. ceased
(Non- regeneration.
Catalyzed YELLOW lamp.
DPF)
14 Time out. NO lamp.

ABBREVIATIONS DESCRIPTION
SC+5S Short Circuit+, 5V Supply Line
SC–5S Short Circuit–, 5V Supply Line
MS Missing Signal (Loss of Signal). Signal unavailable or not regularly updated.
SC+M Short Circuit+, Measuring line
SC–M Short Circuit–, Measuring line
OCM Open Circuit, Measuring line
OCG Open Circuit, Ground line
Noisy Disturbances on Measuring line
SC+ Pos Short Circuit+, Positive side
SC– Neg Short Circuit–, Negative side
ILL_MIN Out of range, min voltage, illegal
ILL_MAX Out of range, max voltage, illegal
SC+ LS Short Circuit+ Low Side
SC– HS Short Circuit High Side

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 VENDOR APPLICATION GUIDE V-MAC IV 07 EMISSIONS STD.

ELECTRICAL FAULTS FOR INSTRUMENT CLUSTER MODULE (MID 140)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
PID 77 0 Front Rear Temp over RED lamp. Optional sensor
Axle Temp warning
threshold
5 Open circuit YELLOW lamp.
6 Circuit
shorted to
ground
PID 78 0 Rear Rear Temp over RED lamp. Optional sensor
Axle Temp warning
threshold
5 Open circuit YELLOW lamp.
6 Circuit
shorted to
ground
PID 96 5 Fuel Level Open circuit YELLOW lamp.
6 Circuit
shorted to
ground
PID 110 9 Engine Oil Abnormal YELLOW lamp.
Pressure Update rate
GuardDog
PID 110 9 Engine Abnormal YELLOW lamp.
Coolant Update rate
GuardDog
PID 116 3 Air Voltage above YELLOW lamp.
Application normal or
Transducer shorted high
4 Voltage below
normal or
shorted low
PID 117 3 Primary Air Voltage above YELLOW lamp.
Pressure normal or
Transducer shorted high
4 Voltage below
normal or
shorted low
PID 118 3 Secondary Voltage above YELLOW lamp.
Air normal or
Pressure shorted high
Transducer
4 Voltage below
normal or
shorted low

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 VENDOR APPLICATION GUIDE V-MAC IV 07 EMISSIONS STD.

ELECTRICAL FAULTS FOR INSTRUMENT CLUSTER MODULE (MID 140) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
PID 158 0 System Voltage too Data valid
Voltage high but above
normal
operational
range
1 Voltage too Data valid
low but below
normal
operational
range
3 Voltage too High battery YELLOW lamp.
high voltage
4 Voltage too Low battery
low voltage
PID 170 5 Interior Open circuit Faulty Harness/ Gauge needle Measure cable,
Temperature Harness/ Sensor moves to zero harness, sensor.
6 Circuit
Sensor Sensor position. Optional sensor.
shorted to
ground YELLOW lamp.

PID 171 5 Ambient Open circuit Faulty Harness/ Gauge needle Measure cable,
Temperature Harness/ Sensor moves to zero harness, sensor.
6 Circuit
Sensor Sensor position. Optional sensor.
shorted to
ground YELLOW lamp.

PID 173 5 Exhaust Open circuit Faulty Harness/ Gauge needle Measure cable,
Temperature Harness/ Sensor moves to zero harness, sensor.
6 Circuit Sensor position.
shorted to Optional sensor.
ground YELLOW lamp.

PID 177 5 Trans Oil Open circuit Faulty Harness/ Gauge needle Measure cable,
Temperature Harness/ Sensor moves to zero harness, sensor.
6 Circuit Sensor position.
shorted to Optional sensor
ground YELLOW lamp.
9 Trans Oil Abnormal J1939 Trans MID 130 YELLOW lamp. Fault trace link.
Temperature update rate ECU faulty/ Transmission
GuardDog broken
PID 358 3 Air Voltage above Faulty Harness/ Gauge needle Measure cable,
Suspension normal or Harness/ Sensor moves to zero harness, sensor.
Pressure shorted low Sensor position. Optional sensor.
Transducer YELLOW lamp.
4 Voltage below
normal or
shorted low
PID 439 9 Boost Abnormal J1587 EMS MID 128 YELLOW lamp. Fault trace J1587.
Pressure update rate Faulty/ Engine
GuardDog Broken
PSID 47 12 Steering Bad intelligent Faulty Harness/ YELLOW lamp. MP or Cummins engine.
Stalk device Harness/ Stalk Switch Measure cable,
Escape Unit harness, stalk switch.
Button
PSID 48 12 Steering Bad intelligent Faulty Harness/ YELLOW lamp. Measure cable,
Stalk device Harness/ Stalk Switch harness, sensor.
ENTER Unit
Button

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 VENDOR APPLICATION GUIDE V-MAC IV 07 EMISSIONS STD.

ELECTRICAL FAULTS FOR INSTRUMENT CLUSTER MODULE (MID 140) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
PSID 49 12 Steering Bad intelligent Faulty Harness/ YELLOW lamp.
Stalk UP device Harness/ Stalk Switch
Button Unit
PSID 50 12 Steering Bad intelligent Faulty Harness/ YELLOW lamp. With automated manual
Stalk device Harness/ Stalk Switch or Allison transmission.
DOWN Unit
Button
PSID 53 3 Engine Voltage above Faulty MID 128 YELLOW lamp.
Speed, normal or Harness/ Engine
High shorted high Unit
Voltage
4 Engine Voltage below
Speed, Low normal or
Voltage shorted low
PSID 54 3 Vehicle Voltage above Faulty MID 128 YELLOW lamp.
Speed, normal or Harness/ Engine
High shorted high Unit
Voltage
4 Vehicle Voltage below
Speed, Low normal or
Voltage shorted low
PSID 200 9 J1939 Timeout on CAN 1 J1939 Down/ YELLOW lamp. MP or Cummins engine
Datalink, J1939 communication Shorted Fault trace J1939 link.
MID 128 communication down
from EECU
(MID 128)
PSID 201 9 J1939 Timeout on CAN 1 J1939 Down/ YELLOW lamp. Fault trace J1939 link.
Datalink, J1939 communication Shorted
MID 144 communication down
from VECU
(MID 144)
PSID 204 9 J1939 Timeout on CAN 1 J1939 Down/ YELLOW lamp. Fault trace J1939 link.
Datalink, J1939 communication Shorted
MID 136 communication down
from ABS
(MID 136)
PSID 205 9 J1939 Timeout on CAN 1 J1939 Down/ YELLOW lamp. With automated manual
Datalink, J1939 communication Shorted or Allison transmission.
MID 130 communication down Fault trace J1939 link.
from
transmission
(MID 130)
SID 231 9 J1939 link No CAN 1 J1939 Down/ YELLOW lamp. Fault trace J1939 link.
communication communication Shorted
on J1939 link down
SID 250 9 J1708 No J1587 J1587 Down/ YELLOW lamp. Fault trace J1587 link.
link/J1587 communication communication Shorted
link on down
J1708/J1587
link
PPID 119 9 Engine Abnormal J1587 EMS MID 128 YELLOW lamp. Fault trace J1587 link.
Coolant update rate faulty/ engine
GuardDog broken

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 VENDOR APPLICATION GUIDE V-MAC IV 07 EMISSIONS STD.

ELECTRICAL FAULTS FOR VEHICLE ECU (MID 144)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
PID 83 14 Vehicle Special NO lamp. Example of special
(Road) vehicle speed vehicle speed limit:
Speed Limit limit Lowered Air
Status exceeded. Suspension RSL.
PID 84 2 Vehicle Vehicle speed Harness YELLOW lamp. Measure cable harness
(Road) sensor and tachometer
Speed tamper component.
detected or
ABS wheel
speed data
missing on
J1587.
2 Invalid output With automated manual
shaft speed or Allison transmission.
signal
broadcast by
automated
manual or
Allison trans
on J1939 and
J1587 output
shaft speed
signal
missing.
2 Wheel speed With Cummins only.
broadcast by
Cummins
EECU is
invalid.
5 Vehicle speed Data valid YELLOW lamp. With manual
sensor open but above transmission.
circuit normal
operational
range
6 Vehicle speed Data valid
sensor but below
shorted to normal
ground operational
range
PID 86 14 Cruise Timeout on YELLOW lamp. With VORAD.
Control Set ACC1
Speed message with
Adaptive
cruise
installed.

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 VENDOR APPLICATION GUIDE V-MAC IV 07 EMISSIONS STD.

ELECTRICAL FAULTS FOR VEHICLE ECU (MID 144) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
PID 91 3 Percent Accelerator Signal Harness/ Engine will not Measure ground, supply
Accelerator pedal sensor shorted Sensor supply the lead, signal lead, cable
Pedal out of range, high or requested fuel harness.
Position position faulty increase.
higher than harness/ YELLOW lamp.
expected. sensor
4 Accelerator Signal Harness/ Engine will not Measure ground, supply
pedal sensor shorted Sensor supply the lead, signal lead, cable
out of range, low or requested fuel harness.
lower than faulty increase.
expected or harness/ YELLOW lamp.
open circuit. sensor
5 IVS shorted Faulty Harness/ Engine will not Measure ground, supply
high with sensor Sensor supply the lead, signal lead, cable
pedal position requested fuel harness.
at idle. increase.
YELLOW lamp.
6 IVS shorted Faulty Harness/ Engine will not Measure ground, supply
low with pedal sensor Sensor supply the lead, signal lead, cable
position off requested fuel harness.
idle. increase.
YELLOW lamp.
13 Accelerator YELLOW lamp. Perform VCADS test for
pedal “Accelerator Pedal
calibration Calibration.”
required OR
calibrated
pedal out of
limits.
PID 191 5 Transmission Vehicle speed YELLOW lamp. With Cummins and
Output Shaft sensor open manual transmissions.
Speed circuit or
shorted to
ground.
6 Vehicle speed YELLOW lamp. With Cummins and
sensor manual transmissions.
shorted
across
sensor.

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 VENDOR APPLICATION GUIDE V-MAC IV 07 EMISSIONS STD.

ELECTRICAL FAULTS FOR VEHICLE ECU (MID 144) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
PPID 3 3 Starter Starter relay Faulty Harness Starter motor not Check the cabling from
Output output cables or activated at VECU via the Relay to
shorted to relay coil request. EMS.
battery with shorted YELLOW lamp.
VECU output
inactive. Buzzer sound.

4 Starter relay Faulty Harness/ Starter motor not Check the cabling from
output cables or Relay activated at VECU via the Relay to
shorted to relay request. EMS.
ground. YELLOW lamp.
Buzzer sound.
PPID 60 4 Idle validation Idle YELLOW lamp.
switch supply. validation
switch
supply
shorted to
ground
PPID 69 3 Buffered Buffered idle Signal Harness YELLOW lamp. Measure signal wiring
Idle validation shorted for the switch, cable
Validation switch does high. harness.
Switch not match idle
validation
switch, circuit
on pin VECU
VB17 shorted
to ground.
4 Buffered idle Signal YELLOW lamp. Measure signal wiring
validation shorted for the switch, cable
switch does low. harness.
not match idle
validation
switch, circuit
on pin VECU
VB17 shorted
to ground.
PPID 72 3 Accelerator Abnormally Supply, Harness/ Engine won't Measure signal and
Pedal high voltage Accelerator Sensor supply the ground cable for
Sensor or short circuit Pedal requested fuel accelerator pedal.
Supply to higher sensor increase; retarder Ground and supply
voltage shorted brake deactivated. cable for retarder. Cable
high. YELLOW lamp. harness.

4 Abnormally Supply, Harness/ Engine won't Measure signal and

low voltage or Accelerator Sensor supply the ground cable for
short circuit to Pedal requested fuel accelerator pedal.
ground. sensor increase; retarder Ground and supply
shorted low. brake deactivated. cable for retarder. Cable
YELLOW lamp. harness.

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 VENDOR APPLICATION GUIDE V-MAC IV 07 EMISSIONS STD.

ELECTRICAL FAULTS FOR VEHICLE ECU (MID 144) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
PPID 74 3 EECU/ Abnormally Relay Harness/ YELLOW lamp. Measure ground, cable
VECU high voltage shorted Relay harness and EMS
Supply or short circuit high or component.
Relay to higher broken.
voltage.
4 Abnormally Relay Harness/ YELLOW lamp. Measure ground, cable
low voltage or shorted Relay harness and EMS
short circuit to low or component.
ground. broken.
SID 230 7 Idle Accelerator Faulty Harness/ Engine won't Measure supply lead,
Validation pedal idle harness/ Sensor supply the signal lead, cable
Switch #1 validation connector/ requested fuel harness.
switch does sensor increase.
not match YELLOW lamp.
pedal sensor.
SID 231 2 J1939 Data General error. CAN J1939 YELLOW lamp. Fault trace J1939 data
Link Abnormal Comm. down/shorted link.
update rate. Down
SID 240 2 Program Checksum Software VECU VA17 ECU keeps Reprogram ECU or
Memory calculated at error or resetting. Vehicle change component.
startup differs faulty not drivable.
from the program YELLOW lamp.
stored one. hardware.
SID 243 7 Cruise Cruise Faulty Harness Cruise control Measure supply lead,
Control Set set/decel and Harness/ deactivated. signal lead, cable
Switch resume/accel Connector YELLOW lamp. harness and cruise
both active control component.
simultaneously.
SID 246 4 Brake Pedal Large vehicle YELLOW lamp.
Switch deceleration
without
service brake
activation.
SID 250 2 SAE Some ECU J1587 Some Fault trace J1587 data
J1708/J1587 does not down or function link, check connectors.
Data Link follow the shorted. disturbances
priority rules may happen.
on sending or
the J1708 bus
is down.
SID 253 2 Calibration Dataset has Error when VECU VA17 Dataset default Reprogram datasets.
Memory incorrect programming values used. Some
checksum. (faulty functions may be
EEPROM) deactivated.
YELLOW lamp.
12 Incorrect data
found in
dataset.

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 VENDOR APPLICATION GUIDE V-MAC IV 07 EMISSIONS STD.

ELECTRICAL FAULTS FOR VEHICLE ECU (MID 144) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
PSID 1 7 Retarder Engine brake Faulty Harness Retarder Control Measure supply lead,
Control switch harness deactivated. signal lead, cable
Switch position 2 YELLOW lamp. harness and retarder
input (PA-20) component.
active with
position 1
input (PA-21)
inactive.
PSID 8 2 Neutral circuit
faulty from
Allison
4 Neutral Neutral input YELLOW lamp.
Error shorted high
or switch
stuck closed.
PSID 9 3 Clutch Error Clutch circuit YELLOW lamp.
shorted to
battery.
4 Clutch circuit
shorted to
ground or
open.
PSID 14 9 DataMax Clock or other NO lamp.
General data missing.
Error
13 Out of
Calibration.
PSID 16 3 Power Power relay 1 YELLOW lamp.
Relay 1 output
shorted to
battery.
4 Power relay 1
output
shorted to
ground.
PSID 17 3 Power Power relay 2 YELLOW lamp.
Relay 2 output
shorted to
battery.
4 Power relay 2
output
shorted to
ground.
PSID 26 14 DataMax DataMax trip NO lamp.
Trip Log log
overflowed.
PSID 28 14 DataMax DataMax NO lamp.
GPS Log GPS log
overflowed.

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 VENDOR APPLICATION GUIDE V-MAC IV 07 EMISSIONS STD.

ELECTRICAL FAULTS FOR VEHICLE ECU (MID 144) (CONTINUED)

Serial Line
Information
Symptom/
PID/PPID Caption/ Probable Suspected Indicator Lamp
SID/PSID FMI Function Failure Error Component Color Action/Notes
PSID 34 3 Fifth Wheel Fifth wheel YELLOW lamp.
Slide slide solenoid
Solenoid circuit shorted
high to
battery.
4 Fifth wheel YELLOW lamp.
slide solenoid
circuit shorted
low to ground
or open.
PSID 200 9 J1939 Data Timeout on CAN1 J1939 down YELLOW lamp. Includes Cummins
Link, MID J1939 Comm. or shorted. engine.
128 communication down. Fault trace J1939 data
from EECU link line.
(MID 128)
PSID 205 9 SAE J1939 Incorrect CAN1 J1939 down YELLOW lamp. Fault trace J1939 data
Data Link, update rate. Comm. or shorted. link line.
MID 130 down. With automated manual
or Allison transmission.
PSID 230 4 Critical Uncontrolled Supply VECU A17 YELLOW lamp. Check connectors.
Software reset of voltage Change software.
Error software. drop or
faulty
software.
5 Software Voltage VECU A17 NO lamp. Normal after production
shutdown due supply programming.
to low voltage. interrupted.
Faulty
harness.
12 Severe error; Faulty VECU A17 YELLOW lamp. Reprogram ECU or
reset the software. change component.
software

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 VENDOR APPLICATION GUIDE V-MAC IV 07 EMISSIONS STD.

DATA LINKS SAE J1708/J1587

V-MAC IV complies with the interface definition of The SAE J1708/J1587 data link is used to
SAE J1708 and SAE J1939 “Recommended transmit sensor and engine data to other vehicle
Practice for Serial Data Communications modules including electronic dashboard displays,
Between Microcomputer Systems in Heavy Duty VECU, EMS, ICM, ABS/ATC and transmission
Vehicle Applications.” control systems. The link transmits and performs
diagnostic procedures from external
instrumentation. Changes to feature and function
SAE J1939 calibration values in the VECU, ICM and EMS are
also received across the J1708/J1587 data link.
The SAE J1939 line is a high-speed data link
which is the primary communications link The messages most commonly used in the
between the Vehicle ECU, Instrument Cluster V-MAC IV system are listed on the following
Module and the Engine Management System. pages. Please refer to the MACK J1587
The link is also used for ABS/ATC systems and application document for specific message
transmission control systems. Please refer to information.
MACK J1939 application documentation for
specific message information.
J1587 MESSAGE IDENTIFIERS

Message Identifier (MID) Description

128 Engine Management System
140 Instrument Cluster Module
144 Vehicle Electronic Control Unit

V-MAC ENGINE MANAGEMENT SYSTEM MID: 128

Transmit PID Data Frequency

Attention/Warning Indicator Lamps Status 44 XX 1 sec
Max. Road Speed Limit 74 XX 10 sec
Road Speed Limit Status 83 XX 1 sec
Road Speed 84 XX 0.1 sec
Cruise Control Status 85 XX 0.1 sec
Engine Load 92 XX 0.1 sec
Fuel Delivery Pressure 94 XX 1 sec
Water-in-Fuel Indicator 97 XX 10 sec (optional)
Engine Oil Pressure 100 XX 1 sec
Boost Pressure 102 XX 1 sec
Boost Pressure — extended 439 XX XX 1 sec
Turbocharger Speed 103 XX 1 sec (engine
running)
Intake Manifold Temperature 105 XX 1 sec
Air Inlet Pressure 106 XX 1 sec
Barometric Pressure 108 XX 10 sec
Coolant Temperature 110 XX 1 sec
Coolant Level 111 XX 10 sec
Engine Retarder % 122 XX 1 sec
Module Battery Voltage 158 XX XX On request

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 VENDOR APPLICATION GUIDE V-MAC IV 07 EMISSIONS STD.

V-MAC ENGINE MANAGEMENT SYSTEM MID: 128 (CONTINUED)

Transmit PID Data Frequency

Rated Engine Power 166 XX XX On request
Air Inlet Temperature 172 XX XX 1 sec
Fuel Temperature 174 XX XX 1 sec
Oil Temperature 175 XX XX 1 sec
Fuel Rate 183 XX XX 0.2 sec
Instantaneous Fuel Rate 184 XX XX 0.2 sec
Average Fuel Economy 185 XX XX 10 sec
Idle Engine Speed 188 XX XX On request
Rated Engine Speed 189 XX XX On request
Engine Speed 190 XX XX 0.1 sec
Multi-section Parameter 192 n a b c1…c15 Dynamic allocation
Diagnostics 194 n XX XX XX… As needed
Diag. Clear Code Resp. 196 2 XX XX As needed
Software Identification 234 n aaa [bccc…] On request
Module Serial Number 243 n 128** aaa… On request
Total Vehicle Distance 245 4 XX XX XX XX 10 sec
Relative Humidity 354 XX 10 sec
EGR Temperature 412 XX XX 1 sec
Proprietary Commands: 254
Starter Output 3 XX 1 sec
EGR Mass Flow 35 XX 1 sec
VTG Motor Effort 88 XX XX 1 sec
VTG SRA Temperature 89 XX 1 sec
Engine Protection Status 117 XX 1 sec
Lamp and Fault Status 208 XX 1 sec
Fan Activation Source 298 XX 10 sec
Sweet Spot Status 319 XX 1 sec
DataMax Information 405 XX XX 10 sec
Starter Control Messages 406 XX 1 sec
High Accuracy Fuel — PTO 464 XX XX XX XX 10 sec
High Accuracy Total Idle Fuel 465 XX XX XX XX 10 sec
High Accuracy Total Engine Hours 466 XX XX XX XX 10 sec
High Accuracy Total Idle Hours 467 XX XX XX XX 10 sec
High Accuracy Total Hours — PTO 468 XX XX XX XX 10 sec
High Accuracy Total Fuel 471 XX XX XX XX 10 sec
High Accuracy Total Fuel — Cruise Control 473 XX XX XX XX 10 sec
Total Time in Cruise Control 475 XX XX XX XX 10 sec
Number of Starter Activations 476 XX XX XX XX On request
Total Time of Starter Activation 477 XX XX XX XX On request
Number of Starter Activations in Backup Mode 478 XX XX XX XX On request
Maximum Time if Starter Activation — Backup Mode 479 XX XX On request

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 VENDOR APPLICATION GUIDE V-MAC IV 07 EMISSIONS STD.

V-MAC VEHICLE ECU MID: 144

Transmit PID Data Frequency

Ignition Switch Status 43 XX 1 sec
Attention/Warning Indicator Lamp Status 44 XX 1 sec
Parking Brake Sw Status 70 XX 1 sec
Idle Shutdown Status 71 XX 1 sec
Vehicle Speed 84 XX 0.1 sec
Cruise Control Status 85 XX 0.2 sec
Cruise Control Set Speed 86 XX 10 sec
Cruise Control High Set Limit Speed 87 XX On request
Cruise Control Low Set Limit Speed 88 XX On request
Power Take-Off Status 89 XX 1 sec
Percent Accelerator Pedal Position 91 XX 0.1 sec
PTO Engagement Control Status 150 XX XX 1 sec
Switched Battery Voltage 158 XX XX On request
Ambient Air Temperature 171 XX XX 10 sec
PTO Set Speed 187 XX XX 10 sec/one event
Multisection Parameter 192 n a b c1...c15 d Dynamic allocation
Diagnostics 194 n XX XX ... As needed
Diag. Clear Code Req. 195 nabc As needed
Diag. Clear Code Resp. 196 n XX XX As needed
Speed Sensor Calibration 228 4 XX XX XX XX On request
Software Identification 234 n aaa bbb ccc On request
Vehicle ID Number 237 17 XX XX XX ... On request
Component Identification Parameter 243 n XX XX XX ... On request
Data Link Escape 254 172 code x x x ... x As needed

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 VENDOR APPLICATION GUIDE V-MAC IV 07 EMISSIONS STD.

V-MAC INSTRUMENT CLUSTER MODULE MID: 140

Transmit PID Data Rate

Front Rear Axle Temperature 77 XX 1 sec
Rear Rear Axle Temperature 78 XX 1 sec
Washer Fluid Level 80 XX 10 sec
Fluid Level 96 XX 10 sec
Air Filter Differential Pressure 107 XX 10 sec
Switched Battery Voltage 158 XX XX On request
Ambient Air Temperature 171 XX XX 10 sec
Exhaust Temperature 173 XX XX 1 sec
Transmission Oil Temperature 177 XX XX 1 sec
Diagnostics 194 n XX XX ... As needed
Diagnostic Clear Code Request 195 nabc As needed
Diagnostic Clear Code Response 196 n XX XX As needed
Software Identification 234 n aaa bbb ccc On request
Vehicle ID Number 237 17 XX XX XX ... On request
Component Identification Parameter 243 n XX XX XX ... On request
Total Vehicle Distance 245 4 XX XX XX XX 10 sec
Clock 251 3 XX XX XX 10 sec
Date 252 3 XX XX XX 10 sec

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 VENDOR APPLICATION GUIDE V-MAC IV 07 EMISSIONS STD.

SYSTEM FUNCTIONS Engine Low Idle Adjustment

Low idle speed may be adjusted (within the range
DataMax™ Control Language (for of 550 to 700 rpm; 650 to 700 with ArvinMeritor)
Future Support) using the following procedure:

DataMax™ Control Language provides a means REQUIREMENTS FOR ADJUSTING LOW IDLE
for the user or OEM to either log certain events in
permanent memory for future retrieval and 1. There must be no active fault in the system.
analysis, or to control two relay drives for special 2. The vehicle must be stationary.
applications.
3. The parking brake must be applied.
Mack Trucks, Inc. can provide several DataMax™ 4. The accelerator must be in the idle position.
Control Language custom-defined statements for
driving these relays. These include statements 5. The Speed Control ON/OFF switch must be
for: turned on and off three times within two
seconds and end in the ON position).
앫 On-the-Fly resetting of speed control
parameters At this point, the idle speed will drop to 550 rpm,
앫 Power Take-Offs (PTO) lockouts based on and V-MAC will be ready to accept a new speed.
road speed

Most of the operating parameters available to the

Vehicle ECU are also available for relay control. If Be sure to leave the switch in the ON position.
a specific application is desired, contact a Mack
representative.
STEPS TO ADJUST LOW IDLE
Engine Brake Control 1. Increase or decrease engine speed with
speed control switches.
When equipped, the V-MAC IV system controls 2. Depress and release the clutch pedal or
the engine brake during all applications (including service brake to save new idle speed.
Cruise control). Because of this, the user can
program V-MAC to delay engine brake application
during minor overshoots (above the Cruise Max
Set Speed).
The Electronic Hand Throttle Min Set Speed must
The following requirements must be met for the be set to 500 rpm.
engine brake to operate:
앫 Accelerator pedal at 0% Low idle speed can also be programmed using a
service tool.
앫 Engine brake switch(es) turned on
앫 Engine speed above 900 rpm
앫 No fuel requested

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 VENDOR APPLICATION GUIDE V-MAC IV 07 EMISSIONS STD.

Engine Protection Warning and The V-MAC IV system can be programmed to

shut down except under certain circumstances:
Shutdown
앫 EHT control is active
V-MAC IV offers Engine Protection Warning as a 앫 A PTO is engaged
standard feature for low oil pressure, low coolant
level and high coolant temperature. Standard 앫 Variable speed control is active (EHT or
warnings are also available for transmission and PTO)
exhaust temperature when these sensors are 앫 Single speed control is active (EHT or PTO),
installed at the factory. The engine can also be and/or the engine power is greater than a
programmed to shut down based on any of these programmed threshold
sensor readings.
앫 Sleeper Mode is enabled
A warning and shutdown can also be enabled 앫 Ambient Air Temperature sensor is installed
together for high automatic transmission and Ambient Air Temperature Option and
temperature. Idle Shutdown with Sleeper Mode are
enabled
Idle Shutdown
The engine can be programmed to shut down
The California Air Resources Board (ARB)
after a predetermined interval of driver inactivity.
requires 2008 model year vehicles to be
This feature prevents excessive idling to help
equipped with engines having tamper-resistant
save fuel. After shutdown, the accessory relay
software which limits the time that the engine can
automatically turns off to conserve battery power.
idle at speeds above low idle (550–700 rpm). At
speeds above low idle, and with a PTO engaged,
Thirty seconds before the engine shuts down, the
idle time will be limited to five minutes, after which
Vehicle ECU will turn on the shutdown indicator.
the engine will revert back to low idle. Vehicles
The driver can override the shutdown and reset
equipped with a Clean Idle engine are identified
the interval by pressing the override switch, the
by a label which is affixed to the left front corner
accelerator pedal or the service brake.
of the hood on conventional models (CXU, CHU
and GU), and the lower portion of the driver's side
The idle shutdown function also has a
door on cab-over models (MRU and LEU). Please
programmable warm-up period. If the engine
refer to the Emission Control Systems for MACK
coolant temperature is below the Idle Shutdown
Class 8 Diesel Engines (MACK MP7 and MP8
Warm-Up Temperature threshold when the
Engines) manual for more information.
engine is first started, the shutdown counter will
not start until the temperature exceeds the
warm-up threshold and the warm-up period
expires.

Idle shutdown will NOT occur during a

regeneration. If the idle shutdown timer requests
a shutdown during regeneration, the engine will
not shut down until after regeneration has been
completed.

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Idle Cooldown Min-Max or All Speed Governor

Control
This feature provides a means of cooling down
the engine and turbocharger. If the idle cooldown Using a diagnostic tool, select from the two
option is enabled using VCADS software and the following governors:
system senses that the turbocharger may be hot,
the engine will not shut down when the vehicle 앫 The traditional MACK all-speed governor
stops, the parking brake is set and the key switch (uses the throttle to control engine speed)
is turned to the OFF position. This feature allows 앫 The min-max governor (uses the throttle to
the driver to lock the truck and walk away while control engine power)
still providing adequate cooldown. All switched
accessories will then turn off once the engine has
stopped. If this option is set, the engine can be ON/OFF Fan Control and Electronic
shut down immediately by cycling the key switch
or by pressing the shutdown override switch.
Viscous

The idle cooldown timer is set to 3.5 minutes as There are four modes of operation for the fan
soon as the engine load exceeds 25%, provided control output: Normal Mode, Curb-Side Mode,
that the engine has been running at least On-Road Mode and PTO Active Mode.
60 seconds. After the load drops below 25% (the
lowest trigger is 35% for 2 minutes), the timer Normal Mode — This mode uses engine coolant
begins counting down. If the key switch is turned temperature, outside air temperature and air
off before the timer expires, the engine will conditioning pressure to control the fan output.
continue to run until the timer reaches zero. The air conditioning inputs have programmable
minimum time on settings to prevent excessive
If a pyrometer is installed, the idle cooldown fan cycling.
function will use the pyrometer reading, shutting
the engine down when the temperature drops (The other two following modes basically provide
below 232°C (450°F), or after 3.5 minutes, additional control logic for an optional override
whichever comes first. feature.)

The default for this option is set at OFF from the Curb-Side Mode — Curb-Side refers to the
factory. ability to engage the fan for an unlimited time
while the truck is parked. This mode operates
when vehicle speed is below the programmable
threshold. The user can choose to override the
fan in this mode, and there is no time limit for the
The parking brake must be on for the idle
override.
cooldown function to work.
On-Road Mode — On-Road refers to the ability
to engage the fan manually for a limited time
Limp Home Capability while moving. The user can choose to override
the fan in this mode.
The “Limp Home” capability allows continued
engine operation in the event that an input sensor PTO Active Mode — PTO Active refers to
(vehicle speed, engine speed, accelerator pedal, optional fan engagement while a PTO is
or in some cases, coolant temperature sensor) engaged.
has failed. A fault will still be indicated to alert the
operator, but the engine will continue to function.
Based on the failure detected, engine power may
be limited to protect the engine.

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SYSTEM CONNECTOR PIN EMS CONNECTOR A PIN DESIGNATIONS

DESIGNATIONS PIN Number Description

EA-29 Not used

Engine Management System (EMS) EA-30 Not used

EA-31 Oil temperature signal
Connector Pin Designations
EA-32 SV injector 3 (output)

EMS CONNECTOR A PIN DESIGNATIONS EA-33 J1708/J1587B (Low)

EA-34 J1708/J1587A (High)
PIN Number Description
EA-35 Fan speed sensor (+)
EA-1 Not used
EA-36 NCV injector 6 (output)
EA-2 Not used
EA-37 Crank speed sensor (−)
EA-3 Water in fuel (WIF) valve (for future use)
EA-38 Crank speed sensor (+)
EA-4 Not used
EA-39 Fan speed sensor (−)
EA-5 Not used
EA-40 SV injector 6 (output)
EA-6 Not used
EA-41 Turbo speed sensor (+)
EA-7 V5 reference signal
EA-42 Turbo speed sensor (−)
EA-8 Not used
EA-43 Air-Humidity temp signal
EA-9 Not used
EA-44 NCV injector 5 (output)
EA-10 Not used
EA-45 CAM speed sensor (+)
EA-11 V5 reference ground
EA-46 CAM speed sensor (−)
EA-12 Needle Control Valve injector 2 (output)
EA-47 Boost temperature signal
EA-13 Not used
EA-48 SV injector 5 (output)
EA-14 Not used
EA-49 Not used
EA-15 Not used
EA-50 Aftertreatment fuel pressure sensor
EA-16 Spill valve (SV) injector 2 (output)
EA-51 Not used
EA-17 Not used
EA-52 NCV injector 4 (output)
EA-18 Not used
EA-53 Not used
EA-19 DPF differential pressure sensor
EA-54 Not used
EA-20 NCV injector 1 (output)
EA-55 Not used
EA-21 EGR differential pressure sensor
(Venturi) EA-56 SV injector 4 (output)
EA-22 Boost pressure signal EA-57 Ground (−)
EA-23 Air-Humidity pressure sensor signal EA-58 Not used
EA-24 SV injector 1 (output) EA-59 SV common 1, 2, 3 injectors
EA-25 Not used EA-60 SV common 4, 5, 6 injectors
EA-26 Electronic fan control switch EA-61 NCV common 4, 5, 6 injectors
EA-27 Not used EA-62 NCV common 1, 2, 3 injectors
EA-28 NVC injector 3 (output)

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EMS CONNECTOR B PIN DESIGNATIONS EMS CONNECTOR B PIN DESIGNATIONS

PIN Number Description PIN Number Description

EB-1 Not used EB-32 Not used
EB-2 Aftertreatment fuel shut off valve (H.S.) EB-33 Not used
EB-3 Oil level (low) EB-34 Not used
EB-4 Oil level (high) EB-35 Not used
EB-5 Not used EB-36 Not used
EB-6 Not used EB-37 Not used
EB-7 Preheat sensor 1 EB-38 Not used
EB-8 WIF switch (−) input EB-39 Not used
EB-9 EGR valve (−) EB-40 Not used
EB-10 Switched ground for WIF and coolant EB-41 Not used
level
EB-42 Not used
EB-11 Oil pressure signal
EB-43 Temp downstream (catalyst) signal
EB-12 Not used
EB-44 Temp upstream (catalyst) signal
EB-13 EGR valve (+)
EB-45 Aftertreatment inject 1 (low side)
EB-14 Preheat sensor 2
EB-46 Compressor recirculation valve (heat
EB-15 Buffer IVS + from VECU mode)
EB-16 Fuel pressure signal EB-47 Temp sensor (after DPF)
EB-17 Oil pressure, crank press, fuel press (+) EB-48 EGR temp aftercooler sensor
supply
EB-49 Electronic fan clutch (−) out
EB-18 Coolant temp, oil press, crank press,
fuel press (−) ground EB-50 Not used
EB-51 J1939 (high)
EB-19 Not used
EB-52 VTG valve and EGR J1939 CAN 2 (+)
EB-20 Not used
EB-53 Not used
EB-21 J1939 (low)
EB-22 J1939 (high) EB-54 Not used

EB-23 Coolant level warning (−) input EB-55 J1939 (low)

EB-24 Not used EB-56 VTG valve and EGR J1939 CAN 2 (−)
EB-57 Engine Management System module
EB-25 Preheat relay
(EMSM) power supply
EB-26 Not used
EB-58 EMSM ground
EB-27 Coolant temperature (−) input
EB-59 EMSM ground
EB-28 Crankcase pressure signal
EB-60 EMSM power supply
EB-29 Starter control
EB-61 EMSM ground
EB-30 PowerLeash™ brake (−) output
EB-62 Aftertreatment inject 1 (high side)
EB-31 Oil level (ground)

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Vehicle Electronic Control Unit VECU CONNECTOR B PIN DESIGNATIONS (CHU, CXU
AND GU MODELS)
(VECU) Connector Pin Designations
PIN Number Description
VECU CONNECTOR A PIN DESIGNATIONS (CHU, CXU VB-1 Power relay 1
AND GU MODELS) VB-2 Power relay 2
PIN Number Description VB-3 Interwheel lock (DCL) (for future
support)
VA-1 Set/Decel
VB-4 Fifth wheel slide
VA-2 Resume/Accel
VB-5 Output supply 4 (optional)
VA-3 Cruise ON/OFF
VB-6 Speed sensor (+)
VA-4 AC ON
VB-7 PTO 2 (DCL C Connector) (for future
VA-5 Service brake support)
VA-6 Key switch crank VB-8 Throttle pedal
VA-7 Spare VB-9 Not used
VA-8 Clutch input VB-10 Throttle pedal supply
VA-9 Neutral VB-11 Park brake
VA-10 Air suspension switch (optional) VB-12 Torque limit (not used)
VA-11 Not used VB-13 Not used
VA-12 Ground VB-14 Not used
VA-13 B+ from EMS Line VB-15 EMS relay (ground relay 34)
VA-14 Key Switch Ign VB-16 DCL 2 output PTO 4 (for future support)
VA-15 Not used VB-17 Buffered IVS 1
VA-16 Not used VB-18 DCL 1 output PTO 3 (for future support)
VA-17 DCL 2 switch PTO 4 (for future support) VB-19 Output supply 3 (TPS)
VA-18 Not used VB-20 Speed sensor (−)
VA-19 Fan clutch override VB-21 DCL 1 PTO 3 (for future support)
VA-20 Engine brake 2 VB-22 Analog ground (TPS)
VA-21 Engine brake 1 VB-23 Not used
VA-22 Not used VB-24 Not used
VA-23 IVS 1 (TPS) VB-25 Not used
VA-24 Water in Fuel VB-26 Not used
VA-25 Interwheel lock differential VB-27 Spare (not used)
VA-26 Fifth wheel slide VB-28 Starter Relay
VA-27 Remote shutdown (optional) VB-29 Not used
VA-28 Hood tilt VB-30 Idle shutdown override
VA-29 PTO 1
VA-30 DRL override

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VECU CONNECTOR C PIN DESIGNATIONS (CHU, CXU VECU CONNECTOR B PIN DESIGNATIONS (LEU
AND GU MODELS) CHASSIS)

PIN Number Description PIN Number Description

VC-1 J1587 (B) VB-1 Power relay 1
VC-2 J1587 (A) VB-2 Power relay 2
VC-3 Not used VB-3 Interwheel lock (DCL) (for future
support)
VC-4 J1939 (+)
VB-4 Fifth wheel slide (not used)
VC-5 J1939 (−)
VB-5 Output supply 4 (not used)
VB-6 Speed sensor (+) (not used)
VECU CONNECTOR A PIN DESIGNATIONS (LEU
CHASSIS) VB-7 PTO 2 (DCL C Connector) (for future
support)
PIN Number Description
VB-8 Throttle pedal
VA-1 Set/Decel
VB-9 Not used
VA-2 Resume/Accel
VB-10 Throttle pedal supply
VA-3 Cruise ON/OFF
VB-11 Park brake
VA-4 Not used
VB-12 Torque limit (not used)
VA-5 Service brake
VB-13 Right-hand operator (Allison)
VA-6 Key switch crank
VB-14 Not used
VA-7 Not used
VB-15 EMS relay (ground relay 34)
VA-8 Clutch input (not used)
VB-16 DCL 2 output PTO 4 Pin K (for future
VA-9 Neutral (not used) support)
VA-10 Air suspension switch (optional) VB-17 Buffered IVS 1
VA-11 Not used VB-18 Oil pressure switch
VA-12 Ground VB-19 Output supply 3 (TPS)
VA-13 B+ from EMS Line VB-20 Speed sensor (−) (not used)
VA-14 Key Switch Ign VB-21 DCL 1 PTO 3 (for future support)
VA-15 Not used VB-22 Analog ground (TPS)
VA-16 Not used VB-23 Not used
VA-17 DCL 2 switch PTO 4 Pin L (for future VB-24 Not used
support)
VB-25 Not used
VA-18 Not used
VB-26 Not used
VA-19 Fan clutch override (not used)
VB-27 Spare (not used)
VA-20 Engine brake 2
VB-28 Starter Relay
VA-21 Engine brake 1
VB-29 Not used
VA-22 Not used
VB-30 Not used
VA-23 IVS 1 (TPS)
VA-24 Water in Fuel
VA-25 Interwheel lock differential
VA-26 Fifth wheel slide (not used)
VA-27 Remote shutdown
VA-28 Hood tilt (not used)
VA-29 PTO 1
VA-30 DRL override (not used)

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VECU CONNECTOR C PIN DESIGNATIONS (LEU VECU CONNECTOR B PIN DESIGNATIONS (MRU
CHASSIS) CHASSIS)

PIN Number Description PIN Number Description

VC-1 J1587 (B) VB-1 Power relay 1
VC-2 J1587 (A) VB-2 Power relay 2 (not used)
VC-3 Not used VB-3 Interwheel lock (DCL) (for future
support)
VC-4 J1939 (+)
VB-4 Fifth wheel slide
VC-5 J1939 (−)
VB-5 Output supply 4 (not used)
VB-6 Speed sensor (+)
VECU CONNECTOR A PIN DESIGNATIONS (MRU
CHASSIS) VB-7 PTO 2 (DCL C Connector) (for future
support)
PIN Number Description
VB-8 Throttle pedal
VA-1 Set/Decel
VB-9 Not used
VA-2 Resume/Accel
VB-10 Throttle pedal supply
VA-3 Cruise ON/OFF
VB-11 Park brake
VA-4 AC ON
VB-12 Torque limit
VA-5 Service brake
VB-13 Right-hand operator (optional)
VA-6 Key switch crank
VB-14 Not used
VA-7 Not used
VB-15 EMS relay (ground relay 34)
VA-8 Clutch input
VB-16 DCL 2 output PTO 4 Pin K (for future
VA-9 Neutral (not used) support)
VA-10 Air suspension switch (optional) VB-17 Buffered IVS 1
VA-11 Not used VB-18 DCL 1 output PTO 3 Pin M (for future
support)
VA-12 Ground
VB-19 Output supply 3 (TPS)
VA-13 B+ from EMS Line
VB-20 Speed sensor (−)
VA-14 Key Switch Ign
VB-21 DCL 1 PTO 3 Pin B (for future support)
VA-15 Not used
VB-22 Analog ground (TPS)
VA-16 Not used
VB-23 Not used
VA-17 DCL 2 switch PTO 4 Pin L (for future
support) VB-24 Not used
VA-18 Not used VB-25 Not used
VA-19 Fan clutch override (not used) VB-26 Not used
VA-20 Engine brake 2 VB-27 Spare (not used)
VA-21 Engine brake 1 VB-28 Starter Relay
VA-22 Not used VB-29 Not used
VA-23 IVS 1 (TPS) VB-30 Not used
VA-24 Water in Fuel
VA-25 Interwheel lock differential
VA-26 Fifth wheel slide (not used)
VA-27 Remote shutdown
VA-28 Hood tilt (not used)
VA-29 PTO 1
VA-30 DRL override (not used)

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VECU CONNECTOR C PIN DESIGNATIONS ICM CONNECTOR A PIN DESIGNATIONS (CHU, CXU
(MRU CHASSIS) AND GU MODELS)

PIN Number Description PIN Number Description

VC-1 J1587 (B) IA-27 Heater mirror switch
VC-2 J1587 (A) IA-28 Venturi pre-heat; wait to start tell tale
(not used)
VC-3 Not used
IA-29 Transmission in reverse (+) input
VC-4 J1939 (+)
IA-30 Spare buzzer input low (not used)
VC-5 J1939 (−)

Instrument Cluster Module (ICM) ICM CONNECTOR B PIN DESIGNATIONS (CHU, CXU
AND GU MODELS)
Connector Pin Designations
PIN Number Description
IB-1 Sensor ground reference (to connector
ICM CONNECTOR A PIN DESIGNATIONS (CHU, CXU A12)
AND GU MODELS)
IB-2 Application air pressure sensor input
PIN Number Description
IB-3 Fuel level sensor input
IA-1 Battery (+) input and Voltmeter signal
IB-4 Exhaust pyrometer sensor (−)
IA-2 Ground (−)
IB-5 Exhaust pyrometer sensor (+)
IA-3 Ignition (Key On and Voltmeter signal)
(+) IB-6 Air suspension pressure sensor input

IA-4 Display Control Switch (DCS) SELECT IB-7 Spare digital input L1 (not used)
(+) input IB-8 Spare digital input L2 (not used)
IA-5 DCS ESCAPE (+) input IB-9 Outside temperature sensor input
IA-6 DCS UP (+) input IB-10 Front rear axle temperature sensor
IA-7 DCS DOWN (+) input IB-11 Rear rear axle temperature sensor
IA-8 Wake up from sleep (ground); not used IB-12 Transmission oil temperature sensor
IA-9 Panel lamp dimmer (+) input IB-13 Primary air pressure sensor input
IA-10 Tell tale 1 (for future use) IB-14 Secondary air pressure sensor input
IA-11 Tell tale 2 (for future use) IB-15 Spare AI R1 (resistive; not used)
IA-12 Sensor ground ref (to connector B1) IB-16 Cab temperature sensor input
IA-13 Spare AI-1 (not used) IB-17 Power supply, 5v air suspension sensor
IA-14 Spare AI-2 (not used) IB-18 Power supply, 5v application air sensor
IA-15 J1939 A-line (+) IB-19 Power supply, 5v primary air sensor
IA-16 J1939 A-line (−) IB-20 Power supply, 5v secondary air sensor
IA-17 J1708/J1587 A-line (+) IB-21 Power supply, 5v spare #3 (+) output
IA-18 J1708/J1587 B-line (−) (not used)

IA-19 Vign — iTAS only (future IB-22 Heated mirror; indicator lamp in switch
support/optional) signal out (−) output

IA-20 Low voltage disconnect (+) output IB-23 Spare digital input L7

IA-21 Spare buzzer input (high) IB-24 Spare digital input L8

IA-22 Power divider lock out (+) input IB-25 High beam (+) input

IA-23 Digital input H1 (not used) IB-26 Turn signal, left (+) input

IA-24 Spare digital input L12 (not used) IB-27 Turn signal, right (+) input

IA-25 Spare digital input H2 (not used) IB-28 Engine preheat input #2 (not used)

IA-26 Wake up from sleep (pull up to v batt) IB-29 Buffered speed output
IB-30 Buffered RPM output

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ICM CONNECTOR C PIN DESIGNATIONS (FOR CHU, Gauge Driver Module (GDM)
CXU AND GU MODELS)
Connector Pin Designations
PIN Number Description
GDM CONNECTOR A PIN DESIGNATIONS (LEU AND
IC-1 Optional second CAN link, J1939, A-line
(+) input/output MRU MODELS)

IC-2 Optional second CAN link, J1939, B-line PIN Number Description
(−) input/output GA-1 Interwheel differential lock (front)
IC-3 Brake pad 2 rear axles (+) input GA-2 Interwheel differential lock (rear)
(GuardDog)
GA-3 Not used
IC-4 Washer fluid level (−) input (GuardDog)
if equipped GA-4 Not used
IC-5 Optional second CAN link, J1939, A-line GA-5 Not used
(+) redundant (not used)
GA-6 Not used
IC-6 Brake pad 3 rear axles (+) input
GA-7 Not used
(GuardDog) not used
GA-8 Not used
IC-7 Brake pad 1 (GuardDog)
GA-9 Analog out (switch, odometer, hour
IC-8 Spare digital input L9 (not used)
meter trip reset); not used
IC-9 Optional second CAN link, J1939, B-line
(−) redundant (not used) GA-10 Not used
GA-11 Not used
IC-10 Optional tell tale input #3 (not used)
GA-12 Gauge dimmer (air pressure,
IC-11 iTAS audible alarm (−) output (future
support) illumination)

IC-12 iTAS armed (+) input (future support) GA-13 Gauge dimmer (transmission, exhaust
temp, warning lamp, speedometer,
IC-13 Air filter restriction (GuardDog) (+) input voltage, fuel level, tachometer, coolant
temp, oil pressure)
IC-14 Emergency stop lamp relay (−) output
GA-14 Odometer reset
IC-15 Optional second CAN link (J1939 A-line
+ redundant + resistor) not used GA-15 Not used
IC-16 Park brake lamp input GA-16 Not used
IC-17 Ign Switch Input (iTAS only; future GA-17 Ambient air temperature sensor
support/optional)
GA-18 Not used
IC-18 Spare digital input L3 (not used)
GA-19 Not used
IC-19 Front inter-wheel lock
GA-20 Data: gauges
IC-20 Rear inter-wheel lock
GA-21 Ground: gauges
IC-21 Spare digital input L4
GA-22 Power: gauges
IC-22 Optional second CAN link (J1939,
B-line [−] redundant [+] resistor) GA-23 Buffered tachometer
GA-24 Buffered speedometer
GA-25 J1587B
GA-26 J1587A
GA-27 J1939 low
GA-28 J1939 high
GA-29 Spare buzzer (not used)
GA-30 Spare buzzer (not used)

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GDM CONNECTOR B PIN DESIGNATIONS (LEU AND Serial Communication Port Pin
MRU MODELS)
Designations
PIN Number Description
GB-1 Right turn signal input SERIAL COMMUNICATION PORT 9-PIN DESIGNATIONS
GB-2 High beam input
PIN Letter Description
GB-3 Reverse transmission signal out
A Tool supply (−)
GB-4 Low air primary switch
B Tool supply (+)
GB-5 Low air secondary switch (not used)
C J1939 data link (+)
GB-6 Park brake (not used)
D J1939 data link (−)
GB-7 Forced neutral
E J1939 data link shield
GB-8 Right-hand operation
F J1587 data link (+)
GB-8 Power divider lockout
G J1587 data link (−)
GB-10 PTO (not used)
H Reserved for OEM use
GB-11 Washer fluid level switch
J IGN (+)
GB-12 Air filter restriction sensor
GB-13 Brakewear 1 (Front sensor)
GB-14 Brakewear 2 (Rear sensor)
GB-15 Left turn signal input
GB-16 Hour meter (not used)
GB-17 Exhaust temperature sensor
GB-18 Fuel level sensor
GB-19 Rear-rear axle temperature sensor
GB-20 Front-rear axle temperature sensor
GB-21 Transmission temperature sensor
GB-22 Ground: transmission temp, rear-rear
axle temp, front-rear axle temp, fuel
level, ambient temp sensors
GB-23 5 volt supply (not used)
GB-24 Ground: internal front and rear engaged
GB-25 5 volt supply (not used)
GB-26 Ground: low level washer fluid
GB-27 5 volt supply to exhaust temp sensor
GB-28 Ground to gauge driver module
GB-29 Ignition signal from EMS
GB-30 Battery input

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DESCRIPTION AND OPERATION

V-MAC IV Major Functions

MID/Serial
Function Inputs Backup Effect if Input Fails Line Info
Power Relay Ignition Key Switch None If switch turns off or fails, relay turns
Control off six seconds later.
Starter Input None If signal is lost, system will not reset 128/SID 39
after a shutdown by engaging the
starter — cycle power instead.
EGR Control Crank Speed Sensor Camshaft Corrects EGR flow. 128/SID 22
Position Sensor
Camshaft Position Sensor Crank Speed 128/SID 21
Sensor
Throttle Pedal Sensor None See “Fuel Control.” 144/PID 84
EGR Air Mass Flow Sensor Reduced power, fuel economy, or 128/PPID 35
performance.
EGR Air Temperature Sensor 128/PID 412
EGR Valve 128/SID 146
Engine Coolant Level Sensor None Open sensor indicates low level. 128/PID 111
Protection Harness open/short could cause
Shutdown protection/shutdown or make
protection/shutdown inactive for
coolant level.
Coolant Temperature Sensor None Protection/shutdown inactive for 128/PID 110
coolant temperature.
Oil Pressure Sensor None Protection/shutdown inactive for oil 128/PID 100
pressure.
Oil Temperature Sensor None Protection/shutdown inactive for 128/PID 175
engine oil temperature.
Exhaust Temperature Sensor None Protection/shutdown inactive for 140/PID 173
exhaust temperature.
J1939 Communications Line None Communications with engine control 128 or
lost. No engine or shutdown warning. 144/PSID
200/201
Transmission Oil None Protection/shutdown inactive for 128/PID 177
Temperature Sensor transmission oil temperature.

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MID/Serial
Function Inputs Backup Effect if Input Fails Line Info
Fuel Control Ambient Air Temperature None Fault on PC screen. White smoke after —
Sensor hot soak startup.
Coolant Temperature Sensor None Fault on PC screen. A low temperature 128/PID 110
reading will increase low idle speed.
Electronic Unit Injector None Rough running, reduced power for 128/SID 1
Solenoid* single failure. Shutdown for failure of through SID 6
all six injectors or major electrical
problem.
Camshaft Position Sensor* Crank Speed Smooth transition to backup. Correct 128/SID 21
Sensor RPM reading on service tool. If both
sensors fail, the engine stalls.
Crank Speed Sensor* Camshaft Correct RPM reading on service tool. 128/SID 22
Position Sensor If both sensors fail, the engine stalls.
Ignition Key Switch None If switch turns off or fails to open, the —
fuel turns off immediately. If switch
fails closed, the engine will not stop
with the key.
Inlet Air Temperature Sensor None Fault on PC screen. 128/PID 172
J1708/J1587 J1939 No loss in functionality. Engine will not 128/SID 250
start if both SID 250 and SID 231 are
active or if MID 128/PID 84 is active.
J1939 Communications Line J1708/J1587 Increase low idle speed to 900 rpm. 128/SID 231
(limited) 900 rpm isochronous governor. VSC
and Cruise control will not function.
Vehicle may not start if theft
deterrence is enabled.
Coolant Temperature Sensor None Shutdown occurs after the warmup 128/PPID 110
and shutdown times have expired
even if the engine has not yet reached
the warmup temperature.
J1939 Communications Line None Communication with engine control 144/SID 231
lost. No idle shutdown.
Shutdown Override Switch None Override cannot be performed. —
Throttle Position Sensor None If vehicle is not moving, shutdown will 128/PID 91
occur at proper time.
Vehicle Speed Sensor None Idle shutdown inhibited. 144/PID 84
Throttle Position Sensor* None Increase low idle speed to 900 rpm. 128/PID 91
900 rpm isochronous governor. VSC
— Signal line open, short to and Cruise control still work. All of the
ground or short to voltage
above at throttle greater than the 0%
— Reference line open or position.
grounded.
Idle Shutdown Coolant Temperature Sensor None Shutdown occurs after the warmup 128/PPID 110
(Idle shutdown and shutdown times have expired
will not occur even if the engine has not yet reached
during an active the warmup temperature.
regeneration)
J1939 Communications Line None Communication with engine control 144/SID 231
lost. No idle shutdown.
Shutdown Override Switch None Override cannot be performed. —
Throttle Position Sensor None If vehicle is not moving, shutdown will 128/PID 91
occur at proper time.
Vehicle Speed Sensor None Idle shutdown inhibited. 144/PID 84

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MID/Serial
Function Inputs Backup Effect if Input Fails Line Info
ON/OFF Fan A/C Pressure Switch None If the A/C pressure switch is open, the —
Control fan will engage because of high
refrigerated pressure. If the A/C
pressure switch is closed, the fan will
disengage if no other fan requests
exists.
Coolant Temperature Sensor None Fan will be engaged all of the time. 128/PID 110
Intake Air Temperature None Fan will be engaged all of the time. 128/PID 172
Sensor
J1939 Communications Line None Fan cannot be overriden with switch. 144/PSID 200
Override Switch None Fan cannot be manually overriden. —
12-Volt Supply None Loss of 12 volts engages the fan. —
Road Speed J1939 Communications Line None Engine speed limited to higher rpm. 144/PSID 200
Limiting Higher rpm isochronous governor.
VSC and Cruise control will not
function.
Vehicle Speed Sensor None Reduced power (customer selectable). 144/PID 84
No speedometer output.
Speed Clutch Switch None No speed control if switch is open. —
Control/Cruise Speed control will not cancel if switch
Control is closed.
J1939 Communications Line None Increase low idle speed to 900 rpm. 144/SID 231
900 rpm isochronous governor. VSC
and Cruise control will not function.
Park Brake Switch None No cruise if switch is closed. No —
VSC/SSC if switch goes from open to
closed.
PTO Switch 1 and 2 None Cannot set SSC if PTO switches are —
open. Engine speed will be limited if
closed.
Service Brake Switch None No cruise if switch is closed. No —
VSC/SSC if switch goes from open to
closed with park brake off.
Speed Control ON/OFF None Cannot set speed control. Cannot set —
SET/RESUME or resume speed control.
Throttle Position Sensor None See “Fuel Control.” —
Vehicle Speed Sensor None Speed control functions (Cruise, VSC, 144/PID 84
ESC) are canceled. Reduced power
(customer selectable).
Timing Control Ambient Air Temperature None Fault on PC screen. White smoke after 128/PID 172
hot soak startup.
Coolant Temperature Sensor None Light load timing retarded. Possible 128/PID 110
white smoke.
Camshaft Position Sensor Crank Speed Correct timing will be approximated. 128/SID 21
Sensor
Crank Speed Sensor Camshaft Correct timing will be approximated. 128/SID 22
Position Sensor
Inlet Air Temperature Sensor None Light load timing retarded. Possible 128/PID 172
white smoke.

Page 115
 VENDOR APPLICATION GUIDE V-MAC IV 07 EMISSIONS STD.

MID/Serial
Function Inputs Backup Effect if Input Fails Line Info
Turbocharger Crank Speed Sensor Camshaft Corrects sliding nozzle ring and vanes 128/SID 22
Sliding Nozzle Position Sensor position.
Ring and Vanes
Camshaft Position Sensor Crank Speed 128/SID 21
Position
Sensor
Throttle Pedal Sensor None See “Fuel Control.” —
Turbocharger Vane Position Reduced power. —
Sensor
Turbocharger Wheel Speed —
Sensor
EGR Air Mass Flow Sensor Reduced power, fuel economy, or 128/PPID 35
performance.
EGR Valve 128/SID 146

*Indicates erratic engine speed or power may occur if this input is intermittent.

Page 116
 VENDOR APPLICATION GUIDE V-MAC IV 07 EMISSIONS STD.

SPECIFICATIONS ENGINE SENSORS

Pressure or Sensor
Sensor Temperature Specifications
V-MAC IV Sensor Specifications
Boost −35°C (−31°F) 35783 ohms
Temperature
The following tables show the normal electrical −25°C (−13°F) 20076 ohms
P/N: 20524936
specifications for the V-MAC IV system sensors (if −15°C (5°F) 12078 ohms
available). −5°C (23°F) 7419 ohms
0°C (32°F) 5887 ohms
ENGINE SENSORS
5°C (41°F) 4707 ohms
Pressure or Sensor
Sensor Temperature Specifications 15°C (59°F) 3074.9 ohms
Air-Humidity 10% relative 1240 mVolts (mV) 25°C (77°F) 2062.9 ohms
(input voltage humidity (rh)
35°C (95°F) 1431.8 ohms
from 4.75 to 5.25)
20% rh 1540 mV
MACK P/N: 45°C (104°F) 100806 ohms
64MT490M 30% rh 1825 mV
55°C (131°F) 720.7 ohms
Volvo P/N: 40% rh 2090 mV
21046544 65°C (149°F) 521.9 ohms
50% rh 2350 mV
75°C (167°F) 382.89 ohms
60% rh 2605 mV
85°C (185°F) 284.37 ohms
70% rh 2860 mV
95°C (203°F) 213.67 ohms
80% rh 3125 mV
105°C (221°F) 162.35 ohms
90% rh 3370 mV
115°C (239°F) 124.05 ohms
−40°C (−40°F) 188500 ohms
125°C (257°F) 96.85 ohms
−30°C (−22°F) 11364 ohms
Camshaft 20°C (68°F) 860 ohms
−20°C (−4°F) 67801 ohms Position (Engine
Position)
−10°C (14°F) 42450 ohms
P/N: 20513343
0°C (32°F) 27278 ohms
Crank Speed 20°C (68°F) 860 ohms
10°C (50°F) 17958 ohms (Engine Speed)
20°C (68°F) 12091 ohms P/N: 20513343
30°C (86°F) 8313 ohms Coolant Level Not available at
P/N: 20900982 time of printing
40°C (104°F) 5827 ohms
50°C (122°F) 4160 ohms
60°C (140°F) 3020 ohms
70°C (158°F) 2228 ohms
80°C (176°F) 1667 ohms
90°C (194°F) 1265 ohms
Boost Pressure 7.7 psi 0.5 volts
(linear voltage
increases 58 psi 4.5 volts
between 7.7 psi
and 58 psi)
P/N: 20524936/
64M7480M

Page 117
 VENDOR APPLICATION GUIDE V-MAC IV 07 EMISSIONS STD.

ENGINE SENSORS ENGINE SENSORS

Pressure or Sensor Pressure or Sensor
Sensor Temperature Specifications Sensor Temperature Specifications
Coolant −40°C (−40°F) 45.313 ohms DPF −40°C (−40°F) 169.7 ohms
Temperature Temperature
−30°C (−22°F) 26.114 ohms 0°C (32°F) 200.5 ohms
P/N: 20513340 Sensor
−20°C (−4°F) 15.462 ohms P/N: 20451990 25°C (77°F) 219.6 ohms
−10°C (14°F) 9.397 ohms 50°C (122°F) 238.5 ohms
0°C (32°F) 5.896 ohms 100°C (212°F) 275.9 ohms
10°C (50°F) 3.792 ohms 200°C (392°F) 349.0 ohms
20°C (68°F) 2.5 ohms 300°C (572°F) 419.7 ohms
30°C (86°F) 1.707 ohms 400°C (752°F) 488.1 ohms
40°C (104°F) 1.175 ohms 500°C (932°F) 554.1 ohms
50°C (122°F) 0.798 ohms 600°C (1112°F) 617.8 ohms
60°C (140°F) 0.596 ohms 700°C (1292°F) 679.2 ohms
70°C (158°F) 0.435 ohms 800°C (1472°F) 738.2 ohms
80°C (176°F) 0.323 ohms 850°C (1562°F) 766.8 ohms
90°C (194°F) 0.243 ohms EGR Diff
Pressure (at
100°C (212°F) 0.786 ohms
–40°C to 125°C
110°C (230°F) 0.144 ohms [–40°F to 257°F]
and 5.0 volts
120°C (248°F) 0.113 ohms input)
130°C (266°F) 0.089 ohms P/N: 20930137
140°C (284°F) 0.071 ohms EGR Temp
Crankcase 5.9 pressure per 0.5 volts Aftercooler (at
–40°C to 100°C
Pressure (at square inch
[–40°F to 212°F]
25°C [77°F] and absolute (psia)
5.0 volts input) and 5.0 volts
20.3 psia 4.5 volts input)
P/N: 20796744
P/N: 21010707
DPF Diff Input pressure
Pressure range: Fuel Pressure 0 psi 0.5 volts
Sensor (at 25°C [77°F]
0 to 35 kPa diff and 5.0 volts 101.5 psi 4.5 volts
P/N: 20451992 pressure input)
Proof pressure: P/N: 20898038
100 kPaD Max
NOx Sensor
Burst pressure:
P/N: 21069361
high side
(300 kPaD Max) Oil Pressure (at 0 pressure per 0.5 volts
25°C [77°F] and square inch
low side 5.0 volts input) gauge (psig)
(200 kPaD Max)
P/N: 20484678 101.5 psig 4.5 volts
Oil Level
P/N: 24424110
Maximum −20°C (−4°F) 155.7 mVolts
[(±) 30]
Minimum −20°C (−4°F) 1009.1 mVolts
[(±) 50]
No Oil −20°C (−4°F) 1130.2 mVolts
[(±) 56]

Page 118
 VENDOR APPLICATION GUIDE V-MAC IV 07 EMISSIONS STD.

ENGINE SENSORS INSTRUMENT CLUSTER SENSORS

Pressure or Sensor Pressure or Sensor
Sensor Temperature Specifications Sensor Temperature Specifications
Oil Temperature 25°C (77°F) 1520 ohms Air Suspension 0 pressure per 0.5 volts
P/N: 24424110 Pressure square inch
60°C (140°F) 377.9 ohms
(At 25°C and gauge (psig)
90°C (194°F) 139.7 ohms 5.0 volts input; 174 psig 4.5 volts
100°C (212°F) 103.6 ohms linear voltage
increase between
120°C (248°F) 59.6 ohms 0 psi and 174 psi)
130°C (266°F) 46.1 ohms P/N: 64MT373
Turbocharger Ambient Air −20°C (−4°F) 10047.1 ohms
Speed P/N: 64MT2118M 0°C (32°F) 3280.7 ohms
(measured
between pins 1 20°C (68°F) 1231.7 ohms
and 2. Pin 3 is the
40°C (104°F) 524 ohms
shield wire)
P/N: 24426713 Exhaust Range: −40°C to
Temperature 1000°C (−40°F to
Nominal 25°C (77°F) 600 ohms Pyrometer 1832°F)
Maximum 25°C (77°F) 1000 ohms P/N: 64MT377M
Water in Fuel Power draw: 5 to Front Drive Axle 0°C (32°F) 6100 ohms
P/N: 20771580 10 mA Temperature
30°C (86°F) 1730 ohms
P/N:
64MT2113AM 60°C (140°F) 599 ohms

VEHICLE SENSORS 100°C (212°F) 184.7 ohms

Pressure or Sensor 120°C (248°F) 111.3 ohms

Sensor Temperature Specifications 140°C (284°F) 70.1 ohms
Throttle Position 9 to 12% Vref at Fuel Level Empty Tank 260 ohms [(±) 6]
(Vref [Supply closed throttle P/N: 16MB48D Half Tank 138 ohms [(±) 6]
Voltage] = 5.0 61 to 69% Vref at
VDC =/− 0.3; Vref full pedal travel Full Tank 33 ohms [(±) 4]
increase is linear
Interior Cab Air −20°C (−4°F) 9776 ohms
between closed
throttle and full P/N: 64MT391M 0°C (32°F) 3279 ohms
pedal travel)
20°C (68°F) 1252 ohms
P/N: 4QB414
40°C (104°F) 528 ohms
Vehicle Speed 20°C (68°F) 163 ohms
Primary and 0 pressure per 0.5 volts
P/N: 64MT439M
Secondary Air square inch
Pressure gauge (psig)
(At 25°C and 174 psig 4.5 volts
INSTRUMENT CLUSTER SENSORS 5.0 volts input;
Pressure or Sensor linear voltage
Sensor Temperature Specifications increase between
0 psi and 174 psi)
Air Application 0 pressure per 0.5 volts
P/N: 64MT373
Pressure square inch
(At 25°C and gauge (psig) Rear Drive Axle 0°C (32°F) 6100 ohms
5.0 volts input; 174 psig 4.5 volts Temperature
30°C (86°F) 1730 ohms
linear voltage P/N:
increase between 64MT2113AM 60°C (140°F) 599 ohms
0 psi and 174 psi)
100°C (212°F) 184.7 ohms
P/N: 64MT373
120°C (248°F) 111.3 ohms
140°C (284°F) 70.1 ohms

Page 119
 VENDOR APPLICATION GUIDE V-MAC IV 07 EMISSIONS STD.

INSTRUMENT CLUSTER SENSORS BODY BUILDER INTERFACE CONNECTOR 2

Pressure or Sensor Circuit Wiring
Sensor Temperature Specifications Cavity Wire ID Description Diagram ID
Transmission 0°C (32°F) 6100 ohms 13 4C6-2.0 Left Hand Turn BBIC2:13
Oil Temperature Signal
30°C (86°F) 1730 ohms
P/N: 14 4D6-2.0 Right Hand Turn BBIC2:14
64MT2113AM 60°C (140°F) 599 ohms
Signal
100°C (212°F) 184.7 ohms
15 BB2-1.0 Spare Pass BBIC2:15
120°C (248°F) 111.3 ohms Through 2
140°C (284°F) 70.1 ohms 16 BB3-1.0 Spare Pass BBIC2:16
Through 3
17 BB4-1.0 Spare Pass BBIC2:17
BODY BUILDER INTERFACE Through 4
V-MAC IV Body Link 18 17C2-1.0 Speed Control BBIC2:18
Decrement
BODY BUILDER INTERFACE CONNECTOR 1 19 BB5-1.0 Spare Pass BBIC2:19
Through 5
Wiring
Cavity Wire ID Description Diagram ID 20 17D2-1.0 Speed Control BBIC2:20
Increment
R —
21 5D2-1.0 Right Hand BBIC2:21
S 48A-5.0 Battery 1 BBIC1:S Turn/Stop Lamp
T — 22 5E2-1.0 Left Hand BBIC2:22
U 70B-5.0 Ignition 1 BBIC1:U Turn/Stop Lamp
V 33B-3.0 Stop Lamps BBIC1:V 23 HB29B-0.8 Buffered Vehicle BBIC2:23
MPH
W 34B-3.0 Reverse Power BBIC1:W
24 —
X 37B-3.0 Tail Lamps BBIC1:X
25 1587HN8-0.8 J1587A (+)* BBIC2:25
Y 35B-3.0 Clearance Lamps BBIC1:Y
26 1587LN8-0.8 J1587B (–)* BBIC2:26
Z 34C-3.0 Neutral Power BBIC1:Z
27 64A1-1.0 Body Indicator BBIC2:27
Lamp (+)
BODY BUILDER INTERFACE CONNECTOR 2 28 BB6-1.0 Spare Pass BBIC2:28
Through 6
Circuit Wiring
Cavity Wire ID Description Diagram ID 29 64B1-1.0 Body Indicator BBIC2:29
Lamp (−)
1 30B-2.0 Aux. SW. Ignition BBIC2:1
*Twisted Pair
2 61B-2.0 Aux. SW. Battery BBIC2:2
3 42B-2.0 Reverse Signal BBIC2:3
4 —
5 CB7A-1.0 PTO 2 BBIC2:5
6 17M-1.0 PTO 1 BBIC2:6
7 17E2-1.0 Speed Control BBIC2:7
ON/OFF
8 HB30B-0.8 Buffered Engine BBIC2:8
RPM
9 BB1-2.0 Spare Pass BBIC2:9
Through 1
10 —
11 —
12 —

Page 120
 VENDOR APPLICATION GUIDE V-MAC IV 07 EMISSIONS STD.

BODY BUILDER CAB INTERFACE CONNECTOR BODY LINK CONNECTOR KIT 204SX420 (1 KIT PER
CHASSIS)
Wiring
Cavity Wire ID Description Diagram ID Qty. Part Number Description
1 30B-2.0 Aux. SW. Ignition BB_CAB:1 1 598AX245 9 Pin Connector
2 61B-2.0 Aux. SW. Battery BB_CAB:2 1 598AX236 29 Pin Connector
3 70B-3.0 Ignition 1 BB_CAB:3 1 980AX44 Size 4 Socket for 13.0 mm²
wire
4 48A-3.0 Battery 1 BB_CAB:4
2 960AX46 Size 8 Socket for 8.0–5.0 mm²
5 CB7A-1.0 PTO 2 BB_CAB:5 wire
6 17M1-1.0 PTO 1 BB_CAB:6 1 980AX71 Size 12 Socket for 5.0 mm²
7 17E2-1.0 Speed Control BB_CAB:7 wire
ON/OFF
9 980AX18 Size 8 Socket for 8.0–5.0 mm²
8 HB30B-0.8 Buffered Engine BB_CAB:8 wire
RPM 14 980AX20 Size 16 Socket for
9 BB1-2.0 Spare Pass BB_CAB:9 1.0–0.5 mm² wire
Through 1
2 980AX49 Size 16 Socket for
10 — 2.0–1.0 mm² wire
11 — 5 980AX54 Size 20 Socket for
1.0–0.5 mm² wire
12 —
1 980AX200 Size 4 Plug
13 —
2 980AX201 Size 8 Plug
14 BB2-1.0 Spare Pass BB_CAB:14
Through 2 29 980AX202 Size 12 and 16 Plug
15 BB3-1.0 Spare Pass BB_CAB:15 6 969AM9 Size 20 Plug
Through 3
16 BB4-1.0 Spare Pass BB_CAB:16
Through 4
17 BB5-1.0 Spare Pass BB_CAB:17
Through 5
18 17C2-1.0 Speed Control BB_CAB:18
Decrement
19 —
20 17D2-1.0 Speed Control BB_CAB:20
Increment
21 5D2-1.0 Right Hand BB_CAB:21
Turn/Stop
22 5E2-1.0 Left Hand BB_CAB:22
Turn/Stop
23 HB29B-0.8 Buffered Vehicle BB_CAB:23
MPH
24 —
25 1587HN8-0.8 J1587A (+)* BB_CAB:25
26 1578LN8-0.8 J1587B (–)* BB_CAB:26
27 —
28 BB6-1.0 Spare Pass BB_CAB:28
Through 6
29 —
*Twisted Pair

Page 121
 VENDOR APPLICATION GUIDE V-MAC IV 07 EMISSIONS STD.

29

Figure 29 — Harness Connector 1 Chassis (598AX244)

BODY BUILDER CONNECTOR 1

Qty. Part Number Description
2 980AX45 Terminal (8.0–5.0) (8)
5 980AX17 Terminal (3.0–2.0) (12)
1 980AX200 Plug Seal (4)
1 980AX202 Plug Seal (12)

30

Figure 30 — Harness Connector 2 Chassis (598AX236)

BODY BUILDER CONNECTOR 2

Qty. Part Number Description
4 980AX60 Terminal (1.0–2.0) (12)
1 980AX49 Terminal (1.0–2.0) (16)
13 980AX48 Terminal (0.8–1.0) (16)
3 980AX54 Terminal (0.8–1.0) (20)
5 980AX202 Plug Seal (12/16)
3 969AM9 Plug Seal (20)

Page 122
INDEX

INDEX

Page 123
 INDEX
A ENGINE PROTECTION WARNING AND
SHUTDOWN . . . . . . . . . . . . . . . . . . . . . . . . . . 103
A/C PRESSURE SWITCH (OPTIONAL). . . . . . . . . 49
EXHAUST GAS RECIRCULATION (EGR)
ADVISORY LABELS . . . . . . . . . . . . . . . . . . . . . . . . . 2
DIFFERENTIAL PRESSURE SENSOR . . . . . . . 37
AFTERTREATMENT FUEL INJECTOR
EXHAUST GAS RECIRCULATION (EGR) VALVE
PRESSURE SENSOR. . . . . . . . . . . . . . . . . . . . 34
OUTPUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
AIR BRAKE APPLICATION SENSOR . . . . . . . . . . 43
EXHAUST TEMPERATURE (PYROMETER)
AIR SUSPENSION PRESSURE SENSOR. . . . 43, 47
SENSOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
AIR-HUMIDITY SENSOR . . . . . . . . . . . . . . . . . . . . 34
AMBIENT AIR TEMPERATURE SENSOR . . . . 43, 47
AUTOMATED TRANSMISSIONS . . . . . . . . . . . . . . 45
F
AUTOMATIC TRANSMISSIONS . . . . . . . . . . . . . . 45 FAN CLUTCH OUTPUT. . . . . . . . . . . . . . . . . . . . . . 53
FAN CLUTCH OVERRIDE SWITCH
B (OPTIONAL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
BOOST PRESSURE-TEMPERATURE FRONT DRIVE AXLE TEMPERATURE
SENSOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
SENSORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
FUEL LEVEL SENSOR . . . . . . . . . . . . . . . . . . . 44, 47
BUFFERED MPH OUTPUT . . . . . . . . . . . . . . . . . . 52
FUEL PRESSURE SENSOR . . . . . . . . . . . . . . . . . . 38
BUFFERED RPM OUTPUT . . . . . . . . . . . . . . . . . . 52
FUEL SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
C
G
CAMSHAFT POSITION (ENGINE POSITION)
GAUGE DRIVER MODULE (GDM) . . . . . . . . . . . . . . 7
SENSOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
GAUGE DRIVER MODULE (GDM) CONNECTOR
CLUTCH SWITCH. . . . . . . . . . . . . . . . . . . . . . . . . . 49
PIN DESIGNATIONS . . . . . . . . . . . . . . . . . . . . 111
COOLANT LEVEL SENSOR. . . . . . . . . . . . . . . . . . 36
GAUGE DRIVER MODULE SENSORS. . . . . . . . . . 47
COOLANT TEMPERATURE SENSOR. . . . . . . . . . 36
GENERAL SWITCH INFORMATION. . . . . . . . . . . . 48
CRANK SPEED (ENGINE SPEED) SENSOR . . . . 35
CRANKCASE PRESSURE SENSOR . . . . . . . . . . . 36
I
D IDLE COOLDOWN. . . . . . . . . . . . . . . . . . . . . . . . . 104
DATA LINKS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98 IDLE SHUTDOWN . . . . . . . . . . . . . . . . . . . . . . . . . 103
DATAMAX™ CONTROL LANGUAGE (FOR IDLE SHUTDOWN OVERRIDE SWITCH
FUTURE SUPPORT). . . . . . . . . . . . . . . . . . . . 102 (OPTIONAL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
DAYTIME RUNNING LIGHTS (DRL) OVERRIDE INSTRUMENT CLUSTER MODULE (ICM) . . . . . . . . 6
SWITCH (OPTIONAL) . . . . . . . . . . . . . . . . . . . . 49 INSTRUMENT CLUSTER MODULE (ICM)
DESCRIPTION AND OPERATION . . . . . . . . . . . . 113 CONNECTOR PIN DESIGNATIONS . . . . . . . . 110
DIAGNOSTICS AND FAULT CODES. . . . . . . . . . . 55 INSTRUMENT CLUSTER MODULE
DIESEL PARTICULATE FILTER (DPF) SENSORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
DIFFERENTIAL PRESSURE SENSOR . . . . . . 37 INTERIOR CAB TEMPERATURE SENSOR . . . . . . 44
DPF SMART SWITCH . . . . . . . . . . . . . . . . . . . . . . 49 INTRODUCTION AND PURPOSE. . . . . . . . . . . . . . . 4
DPF TEMPERATURE SENSORS (PRE CAT,
POST CAT, POST DPF) . . . . . . . . . . . . . . . . . . 37
K
KEY SWITCH (REQUIRED). . . . . . . . . . . . . . . . . . . 50
E
EGR TEMPERATURE AFTERCOOLER
L
SENSOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 LIMP HOME CAPABILITY . . . . . . . . . . . . . . . . . . . 104
ENGINE BRAKE CONTROL. . . . . . . . . . . . . . . . . 102
ENGINE BRAKE LOW AND HIGH SWITCH
M
(OPTIONAL) . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 MANUAL TRANSMISSIONS . . . . . . . . . . . . . . . . . . 45
ENGINE BRAKE OUTPUTS . . . . . . . . . . . . . . . . . . 52 MIN-MAX OR ALL SPEED GOVERNOR
ENGINE LOW IDLE ADJUSTMENT . . . . . . . . . . . 102 CONTROL . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
ENGINE MANAGEMENT SYSTEM (EMS). . . . . . . . 6 MODULE ENVIRONMENTAL AND ELECTRICAL
ENGINE MANAGEMENT SYSTEM (EMS) REQUIREMENTS. . . . . . . . . . . . . . . . . . . . . . . . . 6
CONNECTOR PIN DESIGNATIONS . . . . . . . 105
ENGINE MANAGEMENT SYSTEM N
SENSORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 NOX SENSOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Page 124
 INDEX
O SPEED CONTROL ON/OFF SWITCH . . . . . . . . . . 51
SYSTEM CONNECTOR PIN
OIL LEVEL-TEMPERATURE SENSOR . . . . . . . . . .39
DESIGNATIONS . . . . . . . . . . . . . . . . . . . . . . . 105
OIL PRESSURE SENSOR . . . . . . . . . . . . . . . . . . . .39
SYSTEM CONNECTORS . . . . . . . . . . . . . . . . . . . . . 7
ON/OFF FAN CONTROL AND ELECTRONIC
SYSTEM FUNCTIONS . . . . . . . . . . . . . . . . . . . . . 102
VISCOUS . . . . . . . . . . . . . . . . . . . . . . . . . . . . .104
SYSTEM INPUT SWITCHES . . . . . . . . . . . . . . . . . 48
P SYSTEM OUTPUTS . . . . . . . . . . . . . . . . . . . . . . . . 52
SYSTEM OVERVIEW . . . . . . . . . . . . . . . . . . . . . . . . 6
POWER AND GROUND CONNECTIONS . . . . . . . . .7
POWER RELAY DRIVER . . . . . . . . . . . . . . . . . . . . .53 T
POWER TAKE-OFF (PTO) 1 AND PTO 2
SWITCHES (OPTIONAL) . . . . . . . . . . . . . . . . . .50 THROTTLE (ACCELERATOR) POSITION
PRIMARY AND SECONDARY AIR PRESSURE SENSOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
SENSOR . . . . . . . . . . . . . . . . . . . . . . . . . . . .44, 47 TRANSMISSION OIL TEMPERATURE
SENSOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
R TURBOCHARGER SPEED SENSOR. . . . . . . . . . . 40
REAR DRIVE AXLE TEMPERATURE U
SENSOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44
UNIT INJECTOR OUTPUTS . . . . . . . . . . . . . . . . . . 54
S V
SAE J1708/J1587 . . . . . . . . . . . . . . . . . . . . . . . . . . .98
SAE J1939 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .98 VEHICLE ELECTRONIC CONTROL SENSORS . . 41
SAFETY INFORMATION . . . . . . . . . . . . . . . . . . . . . .2 VEHICLE ELECTRONIC CONTROL
SENSOR REQUIREMENTS. . . . . . . . . . . . . . . . . . .46 UNIT (VECU) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
SERIAL COMMUNICATION PORT PIN VEHICLE ELECTRONIC CONTROL
DESIGNATIONS . . . . . . . . . . . . . . . . . . . . . . . .112 UNIT (VECU) CONNECTOR PIN
SERVICE BRAKE AND PARKING BRAKE DESIGNATIONS . . . . . . . . . . . . . . . . . . . . . . . 107
SWITCHES . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50 VEHICLE SPEED (ROAD SPEED) SENSOR . . . . . 42
SERVICE PROCEDURES AND TOOL V-MAC IV ELECTRONIC CONTROL UNITS . . . . . . 6
USAGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 V-MAC IV MAJOR FUNCTIONS . . . . . . . . . . . . . . 113
SET/RESUME SWITCH (OPTIONAL) . . . . . . . . . . .51 V-MAC IV SENSOR SPECIFICATIONS . . . . . . . . 117
SPARE 1 OR PTO 3 (VECU PIN VB-21) AND
SPARE 2 OR PTO 4 (VECU PIN VA-17) INPUTS
W
(OPTIONAL) . . . . . . . . . . . . . . . . . . . . . . . . . . . .51 WATER IN FUEL FILTER SENSOR . . . . . . . . . . . . 40
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . .117

Page 125
 NOTES

Page 126
 VENDOR
APPLICATION GUIDE
(V-MAC IV) ®

2007 EMISSIONS STD.

PRINTED IN U.S.A.
8-372 © MACK TRUCKS, INC. 2008