Automotive Computer Controlled Systems

computer controlled systems has meant that technicians require additional ... of equipment, suitable training and personal endeavour, service technicians and.
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Automotive Computer Controlled Systems

Automotive Computer Controlled Systems Diagnostic tools and techniques

Allan W. M. Bonnick MPhil CEng MIMechE MIRTE

OXFORD

AUCKLAND

BOSTON

JOHANNESBURG MELBOURNE

NEW DELHI

Butterworth-Heinemann Linacre House, Jordan Hill, Oxford OX2 8DP 225 Wildwood Avenue, Woburn, MA 01801-2041 A division of Reed Educational and Professional Publishing Ltd

First published 2001  Allan Bonnick, 2001 All rights reserved. No part of this publication may be reproduced in any material form (including photocopying or storing in any medium by electronic means and whether or not transiently or incidentally to some other use of this publication) without the written permission of the copyright holder except in accordance with the provisions of the Copyright, Designs and Patents Act 1988 or under the terms of a licence issued by the Copyright Licensing Agency Ltd, 90 Tottenham Court Road, London, England W1P 0LP. Applications for the copyright holder’s written permission to reproduce any part of this publication should be addressed to the publishers British Library Cataloguing in Publication Data Bonnick, Allan W.M. Automotive computer controlled systems: diagnostic tools and techniques 1. Automotive computers I. Title 629.20 549 ISBN 0 7506 5089 3 Library of Congress Cataloguing in Publication Data Bonnick, Allan W.M. Automotive computer controlled systems: diagnostic tools and techniques/Allan W.M. Bonnick. p.cm. Includes index. ISBN 0 7506 5089 3 1. Automotive computers. 2. Automobiles – Maintenance and repair. I. Title. TL272.53 B66 629.20 7 – dc21

Typeset in 11/13pt Garamond by Laser Words, Madras, India Printed and bound in Great Britain

2001018080

1 Common technology ..................................

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1.1 Common technology ......................................... 1.2 Engine-related systems .................................... 1.3 Ignition systems ................................................

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1.3.1 THE CONSTANT ENERGY IGNITION SYSTEM .................................................................. 1.3.2 DIGITAL (PROGRAMMED) IGNITION SYSTEM .................................................................. 1.3.3 DISTRIBUTORLESS IGNITION SYSTEM ...... 1.3.4 OPTOELECTRONIC SENSING FOR THE IGNITION SYSTEM ................................................. 1.3.5 KNOCK SENSING .......................................... 1.3.6 ADAPTIVE IGNITION .....................................

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1.4 Computer controlled petrol fuelling systems .....

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1.4.1 SINGLE-POINT INJECTION ........................... 1.4.2 MULTI-POINT INJECTION .............................

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1.5 Engine management systems (EMS) ...............

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1.5.1 EXHAUST GAS RECIRCULATION ................ 1.5.2 COMPUTER CONTROL OF EVAPORATIVE EMISSIONS ...................................

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1.6 Anti-lock braking (ABS) ....................................

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1.6.1 OPERATION OF ABS ..................................... 1.6.2 SOME GENERAL POINTS ABOUT ABS .......

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1.7 Traction control ................................................. 1.8 Stability control ................................................. 1.9 Air conditioning .................................................

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1.9.1 DEALING WITH AIR CONDITIONING REFRIGERANT .......................................................

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1.10 Computer controlled damping rate ................. 1.11 Computer controlled diesel engine management systems ............................................

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1.11.1 SPILL CONTROL .......................................... 1.11.2 TIMING CONTROL ..........................