AUDI Self-Study Program 994603 The Audi Q7 Electrical System.pdf

Service Training

The Audi Q7 Electrical System

Self-Study Program 994603

Audi of America, Inc.

Service Training

Printed in U.S.A.

Printed 02/2006

Course Number 994603

based on the latest information available at the time of printing

and is subject to the copyright and other intellectual property

rights of Audi of America, Inc., its afﬁliated companies and its

licensors. All rights are reserved to make changes at any time

without notice. No part of this document may be reproduced,

stored in a retrieval system, or transmitted in any form or by

any means, electronic, mechanical, photocopying, recording or

otherwise, nor may these materials be modiﬁed or reposted to

other sites without the prior expressed written permission of

the publisher.

All requests for permission to copy and redistribute

information should be referred to Audi of America, Inc.

Always check Technical Bulletins and the latest electronic

repair information for information that may supersede any

information included in this booklet.

Trademarks: All brand names and product names used in

this manual are trade names, service marks, trademarks, or

registered trademarks; and are the property of their respective

owners.

Table of Contents

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

Fuses and relays. .........................................................................................................3

Overview of control modules installation ...............................................................4

Networking .................................................................................................................6

Control Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Data Bus On Board Diagnostic Interface J533 .........................................................9

Instrument Cluster Control Module J285 ..............................................................10

Vehicle Electrical System Control Module J519 .....................................................12

Battery and energy management ...........................................................................14

Battery .......................................................................................................................22

Generator ..................................................................................................................24

Front exterior lights .................................................................................................28

Rear exterior lights ...................................................................................................29

Vehicle Electrical System Control Module 2 J520 .................................................31

Access/Start Control Module J518 .........................................................................32

Door control modules ..............................................................................................37

Memory Seat/Steering Column Adjustment Control Modules J136 and J521 ..38

Comfort System Central Control Module J393 .....................................................41

Comfort System Central Control Module 2 J773 ..................................................44

Panorama Sunroof ...................................................................................................47

Rear Lid Control Module J605 and Rear Lid Control Module 2 J756 ..................53

Self-Study Programs for the Audi Q7 . . . . . . . . . . . . . . . .55

The self-study program provides introductory information regarding the design and

function of new models, automotive components or technologies.

The self-study program is not a Repair Manual!

All values given are intended as a guideline only and refer to the software version

valid at the time of publication of the SSP.

For maintenance and repair work, always refer to the current technical literature.

Reference

Note

Overview

Electrical System Innovations

The number of electronic control modules has rapidly

increased in recent years. Most innovations are made

possible by increasingly powerful electronics. Without

this development, many comfort features of the vehicle

that are taken for granted would have been impossible to

implement.

To offer customers this variety of functions and

equipment options, various electronic control modules

are required throughout the Audi Q7. The control

modules do not function as separate, independent units;

they are linked via powerful bus systems. Depending on

the amount of data to be exchanged, the MOST bus, an

optical data bus, a CAN bus or a LIN bus is used. Data

is also exchanged across the various bus systems. A

separate control module provides the interface between

the various systems. Therefore, each control module

efﬁciently receives information and vehicle operating

variables that it requires to function.

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This Self-Study Program provides you with the network

topology of the Audi Q7 and gives you an overview of

the location of each electronic component in the vehicle.

You will be given service-relevant information on the

control modules, learn their installation location, and

become familiar with the tasks of the individual control

modules. This program provides a quick and efﬁcient

means to obtain a comprehensive understanding of the

electronics in the Audi Q7.

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