AUDI Self-Study Program 961103 Handling Control Systems Design and Function.pdf

Audi of America, Inc

Service Training

Printed in U.S.A.

Printed 07/2001

Course Number 961103

in this manual is based on the latest product

information available at the time of printing.

The rights are reserved to make changes at

any time without notice. No part of this

publication may be reproduced, stored in a

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by any means, electronic, mechanical or

photocopying, recording or otherwise, without

the prior permission of the publisher. This

includes text, figures and tables. Always check

Technical Bulletins and the Audi Worldwide

Repair Information System for any information

that may supersede any information included

in this booklet.

HANDLING CONTROL SYSTEMS

ABS is the abbreviation

for “anti-lock braking system.”

The task of ABS is to provide the driver better

braking and steering control during situations

in which traction is reduced or lost.

Continuing developments in passenger car

ABS and traction assist systems have resulted

in powerful and reliable systems that are

capable of furnishing optimum braking,

traction and steering response during critical

conditions.

Important/Note!

New!

HANDLING CONTROL SYSTEMS

HANDLING CONTROL SYSTEMS

Table of Contents

Anti-lock Braking Systems (ABS)

Introduction ............................................................................................................................................. 1

System Abbreviations .............................................................................................................................. 3

Introduction to Audi ABS Systems ............................................................................................................. 4

System Application Chart ................................................................................................................... 4

Basic Operation of ABS ........................................................................................................................... 5

Common ABS System Components ........................................................................................................... 6

Wheel Speed Sensors (G44, G45, G46 and G47) .............................................................................. 8

ABS Control Module (J104) .............................................................................................................. 10

Hydraulic Unit ................................................................................................................................. 13

Brake System Warning Lights ........................................................................................................... 15

Traction Assist Systems

Description and Operation ..................................................................................................................... 17

Electronic Brake Pressure Distribution (EBD) ....................................................................................... 17

Electronic Differential Lock (EDL) ....................................................................................................... 18

Anti-slip Regulation (ASR) ................................................................................................................ 19

Electronic Stability Program (ESP) ..................................................................................................... 20

AUDI ABS Systems

Bosch 2S ABS ....................................................................................................................................... 21

Bosch 5.0 ABS ...................................................................................................................................... 23

Bosch 5.3 ABS ...................................................................................................................................... 25

Bosch 5.7 ABS ...................................................................................................................................... 28

Teves MK 20 IE ABS .............................................................................................................................. 32

Teves MK 60 ABS .................................................................................................................................. 34

ABS Service .......................................................................................................................................... 36

4-Level Air Suspension

Introduction ........................................................................................................................................... 37

Air Suspension Levels ............................................................................................................................ 38

Air Suspension Control Display .............................................................................................................. 39

Manual Suspension Control ................................................................................................................... 40

Conditions for Manual Operating Mode ............................................................................................ 40

Service (Jack) Mode ........................................................................................................................ 41

Hoist Mode ..................................................................................................................................... 41

Automatic Suspension Control ................................................................................................................ 42

Cornering ....................................................................................................................................... 43

Air Suspension Components ................................................................................................................... 44

Warning Lamp (K134) ..................................................................................................................... 44

Control Module (J197) ..................................................................................................................... 44

Leveling Senders (G76, G77, G78 and G289) .................................................................................. 45

Air Springs ..................................................................................................................................... 46

Air Compressor ............................................................................................................................... 47

Temperature Sensor (G290) ............................................................................................................. 48

Solenoid Valves ............................................................................................................................... 48

Pressure Sensor (G291) ................................................................................................................... 48

Pressure Accumulator ...................................................................................................................... 49

Test Your Knowledge

Teletest .................................................................................................................................................. 51

Answer Worksheet ................................................................................................................................ 55

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