The Phaeton W12 Engine Management System Design and Function

The Phaeton W12 Engine Management System Design and Function

Self-Study Program Course Number 892303

Volkswagen of America, Inc. Service Training Printed in U.S.A. Printed 08/2003 Course Number 892303

?2003 Volkswagen of America, Inc.

All rights reserved. All information contained in this manual is based on the latest information available at the time of printing and is subject to the copyright and other intellectual property rights of Volkswagen 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.

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Table of Contents

Introduction ............................................................................... 1 The Motronic ME 7.1.1

System Overview ...................................................................... 6 Engine Control Module 1 J623, Engine Control Module 2 J624

Subsystems ............................................................................. 10 Fuel Injection System, Ignition System, Knock Control, Variable Valve Timing, Oxygen Sensor Control, EVAP System, Cruise Control System Without Adaptive Cruise Control, Electronic Power Control, Secondary Air System, Engine Mount Damping Control, Electronically Controlled Engine Cooling

Functional Diagram ................................................................. 54 ME 7.1.1 Functional Diagram for Phaeton W12 Engine

Service...................................................................................... 60 Self-Diagnosis System

Knowledge Assessment ......................................................... 65

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The Self-Study Program provides you with information regarding designs and functions.

The Self-Study Program is not a Repair Manual. For maintenance and repair work, always refer to the current technical literature.

Important/Note!

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Introduction

The Motronic ME 7.1.1

The Motronic ME 7.1.1 engine management system for the W12 engine allows high engine performance with low fuel consumption by adapting to all operating conditions. At the heart of the Motronic ME 7.1.1 are two electronic engine control modules. This concept treats the two cylinder banks as two separate engines.

Each engine control module is assigned to one bank of the engine. Certain critical inputs, such as engine coolant temperature, report only to the primary Engine Control Module 1 J623. Engine Control Module 2 J624 obtains information only from Engine Control Module 1 J623 via the CAN data bus.

This internal CAN data bus serves exclusively to exchange information between the two engine control modules.

This Self-Study Program will familiarize you with the ME 7.1.1 engine management system, the interaction between the two control modules, the sensors, the actuators and individual subsystems.

For additional information on the W engine series, refer to The W Engine Concept, Self-Study Program Course Number 821203.

SSP250/096

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