SSP_840293.pdf

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Service Training
Self-Study Program 840293
Engine Management Systems
Volkswagen Group of America, LLC
Volkswagen Academy
Printed in U.S.A.
Printed 2/2010
Course Number 840293
©2010 Volkswagen Group of America, LLC
All rights reser ved. 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 Group of
America, LLC, 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 Volkswagen Group of America, LLC.
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.
Contents
Introduction .......................................................................................................1
Motronic ME 7 ...................................................................................................8
Motronic ME 7.1.1 ............................................................................................18
Motronic MED 9.1............................................................................................29
Motronic MED 9.1.1 .........................................................................................41
Motronic MED 17.5 ..........................................................................................48
Reference Materials .........................................................................................53
Glossary ...........................................................................................................54
Knowledge Assessment..................................................................................59
Note
Important!
This Self-Study Program covers information on
the Volkswagen Engine Management Systems.
This Self-Study Program is not a Repair Manual.
This information will not be updated.
For testing, adjustment and repair
procedures, always refer to the latest
electronic service information.
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Introduction
Introduction
What
Since the introductions of the D-Jetronic fuel injection
system in Model Year (MY) 1968, the Motronic
ME7 torque-based system in MY 1999, and the
current Motronic MED17 dual gasoline/diesel
.5
system, Volkswagen engine management systems
continue to evolve to meet the demands of changing
emissions and fuel economy standards.
This Self Study Program (SSP) discusses changes
and additions implemented since the April of 2000
publication of SSP 841003, Engine Management
Systems. Components that are unchanged from
previous engine management systems are listed with
the new system, but are not described in detail. If a
component is not described in this document, you
will be referred to a previous SSP that contains the
information.
Why
Volkswagen is continually upgrading engine control
systems to meet the increasing demands for
increased performance and greater fuel economy, all
the while decreasing tailpipe emissions.
California emission standards have been traditionally
more stringent than the EPA requirements, but their
evolution and structure is similar to that of the federal
legislation. The California Air Resources Board (CARB)
first adopted Low Emission Vehicle (LEV) standards in
1990. These first LEV standards were in effect from
1994 through 2003.
LEV II regulations, adopted in November 1998, are
in effect from 2004 through 2010. LEV II affects
passenger cars, light-duty trucks (such as the
Touareg 2), and medium-duty vehicles.
A number of other states have adopted emission
standards equivalent to the California LEV II
legislation, including New York, Massachusetts,
Maine, and Vermont. Adoption of California standards
has been considered also by Connecticut, Rhode
Island, Pennsylvania, New Jersey, Oregon, and
Washington.
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