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Autodata
Contents
This manual is a comprehensive single source of information on diagnostic trouble codes for engine
management, transmission and immobilizer systems for cars and light commercials introduced or
revised during the period 1994-2004.
The manual is part of a series from Autodata and has been written and presented in a way to enable any
professional automotive technician, with appropriate skills and competence, to make accurate tests and
diagnoses, on the engine management, transmission and immobilizer systems.
Detailed knowledge of self-diagnosis systems is not required to make full use of this publication. With a
basic understanding of fuel and electrical systems, successful trouble shooting and fault repair should be
possible.
Using this manual, in conjunction with the Autodata CD2, or the Pin Data, Engine Management and
Wiring Diagrams manuals, time and expense can be saved by quickly tracing and rectifying the cause of
obscure and/or intermittent faults.
Where possible, procedures for accessing trouble codes without special diagnostic equipment are given,
but increasingly some form of 'scan tool' is required to successfully read the fault memories of control
modules.
Each chapter covers a range of models sharing the same trouble code table and lists the codes in
numerical or alphabetical order with their fault locations and probable causes.
The probable causes column identifies the various different areas of the system that should be
investigated in addition to the primary component in the fault location column.
If a trouble code has been logged, the fault location can be looked up in the trouble code table. This will
give suggested probable causes, which should be the primary areas for checking. Most of these probable
causes will suggest checking the wiring as well as the primary component in the circuit. The multi-plugs,
wiring continuity, insulation and resistance should all be verified before replacing components.
Index
Engine management
Transmission
Immobilizer
How to use this manual
Abbreviations
Terminology
Fault location
Probable causes
Safety precautions 36
Tools & equipment
Code readers and scan tools
Fault diagnosis and testing methods
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Oscilloscope testing
Oscillosopes and wave forms
Component testing
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Trouble codes
Engine management systems
Electronically controlled transmissions
Immobilizers
Trouble code format
Basic requirements of EOBD
EOBD trouble code table 59
Alfa Romeo - Volvo 91
Contents
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