Table Of ContentCOMPUTERIZED
ENGINE CONTROLS
Ninth Edition
Steve V. Hatch
Lincoln College of Technology, Denver Campus
Formerly
Denver Automotive and Diesel College
Australia • Brazil • Japan • Korea • Mexico • Singapore • Spain • United Kingdom • United States
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Computerized Engine Controls, © 2012 Delmar, Cengage Learning
Ninth Edition
ALL RIGHTS RESERVED. No part of this work covered by the copyright
Steve V. Hatch
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Preface
The application of the microprocessor with OBD II brought to our vehicles back in 1996. While
its related components, circuits, and systems has there are differences between manufacturers, the
made automotive technology exciting, fast paced, reality is that there are more similarities than dif-
and more complicated. Technological advance- ferences. Even prior to OBD II implementation,
ments continue to add complexity to the modern the input and output sides of the various com-
automobile at record-setting rates and show no puter systems were more similar than different.
signs of slowing down. Ultimately, the technol- OBD II standards then standardized the diagnos-
ogy requires that entry-level automotive service tic end of these systems. As a result, the reader
technicians must be well trained in the principles should begin by concentrating on the first nine
of automotive technology and must continue to generic chapters, then study the system-specific
upgrade their training throughout their careers. chapters that are of interest, and read the final
Those who do this will find the task challenging, two chapters last.
but achievable and rewarding. The chapters of this edition contain:
This text was written in response to a widely
recognized need within the industry: to help stu- • Objectives. Objectives are provided at the
dents and technicians get a commanding grasp beginning of each chapter to help the reader
of how computerized engine control systems op- identify the major concepts to be presented.
erate and how to diagnose problems associated • Key Terms. Terms that are unique to comput-
with them. The student/technician who studies erized engine control systems are provided at
this text will soon come to realize that no single the beginning of each chapter as Key Terms
component or circuit on any given computerized and then appear in boldfacetype at their first
engine control system, other than the computer use in the chapter. These Key Terms are also
itself, is complicated. provided in the Glossary, along with their
Computerized Engine Controls is written with definitions.
the assumption that the reader is familiar with the • Diagnostic & Service Tips. These tips offer
basic principles of traditional engine, electrical helpful advice for the technician on diagnosing
system, and fuel system operation. Although ev- and servicing vehicles, as well as addressing
erything here is within the grasp of a good techni- customer concerns.
cian, this textbook is not a beginner’s book. • Chapter Articles. Chapter articles give addi-
Computerized Engine Controls containseleven tional nice-to-know information about technical
generic chapters (Chapters 1 through 9, 17, 18) topics covered in the chapter.
and seven system-specific chapters (Chapters 10 • Summary. Each chapter contains a Summary
through 16). Emphasis should be placed on the to review the major concepts presented in
generic chapters due to the standardization that that chapter.
vii
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Editorial review has deemed that any suppressed content does not materially affect the overall learning experience. Cengage Learning reserves the right to remove additional content at any time if subsequent rights restrictions require it.
viii Preface
• Diagnostic Exercise. A Diagnostic Exercise the cylinder imbalance monitor and Global OBD
is provided after the Summary of each chapter, II Mode $0A. Chapter 10 (on GM TBI systems)
applying a real-life scenario to a concept of and Chapter 11 (on GM PFI systems) from the
importance to today’s technicians. eighth edition have been combined into one chap-
• Review Questions. Review Questions are ter (Chapter 10) to reduce the emphasis on TBI
provided at the end of each chapter to help systems. Much of the material in these two chap-
the reader assess his/her recall and compre- ters in past editions was repetitiove, with the PFI
hension of the material in each chapter, as chapter referring to the TBI chapter many times.
well as to reinforce the concepts covered. All Finally, Appendix A from the eighth edition has
of these Review Questions have been written now been turned into a final chapter, Chapter
in a multiple-choice format—the type of ques- 18, and has been revamped with much material
tion that would be found on an ASE test. added. A portion has also been added to Chap-
ter 18 that specifically deals with the diagnosis of
Personal safety concerns peculiar to specific emission program failures. Other additions to this
computerized engine control systems are high- chapter include chapter objectives, key terms, a
lighted where applicable. The book follows the diagnostic exercise, and 20 chapter questions.
industry standards for how to use the following Countless other changes have also been
terms: made throughout this textbook. Acronyms are
now found in Appendix A, and automotive-re-
• Warnings indicate that failure to observe cor- lated web addresses are now found in Appen-
rect diagnostic or repair procedures could re- dix B. These changes and additions have been
sult in personal injury or death. made in order to make this textbook the most
• Cautions indicate that failure to observe cor- comprehensive automotive textbook that you will
rect diagnostic or repair procedures could re- read this year.
sult in damage to tools, equipment, or the ve-
hicle being serviced.
SUGGESTIONS ON HOW
Each student should be aware that while TO USE THIS TEXT
working with computerized controls is not inher-
ently dangerous, failure to observe recognized The reader should begin by reading
safety practices is. There are, unfortunately, many Chapters 1 through 9, preferably in the sequence
more injuries and accidents in the automotive re- they exist in the textbook, as they contain informa-
pair business than there should be. Good safety tion that pertains to all makes of vehicles. Reading
practices, if learned early in a student’s career, these chapters will also provide some background
can literally be lifesaving later on. that will make understanding specific system
designs and diagnostic strategies easier when
reading the system-specific chapters of this book.
New to This Edition
Chapters 10 through 16, which are specific to in-
Additional material on air/fuel ratio sensors dividual manufacturers’ systems, can be read in
is now provided in Chapter 3. Chapter 8, Under- any order, though most students will find it much
standing OBD II, with a slight modification in the easier to read a manufacturer’s set of chapters in
chapter’s title since the previous edition, has also chronological sequence, the way they appear in
been totally revamped so as to flow in a more logi- the book. Generally, systems become more com-
cal sequence for the reader. Necessary updates plex over time. The newer, more complex systems
have also been added to this chapter, including become easier to understand if the reader has
Copyright 2011 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part. Due to electronic rights, some third party content may be suppressed from the eBook and/or eChapter(s).
Editorial review has deemed that any suppressed content does not materially affect the overall learning experience. Cengage Learning reserves the right to remove additional content at any time if subsequent rights restrictions require it.
Preface ix
proficient background knowledge of the earlier, chapter, can also be considered an optional chap-
simpler systems. Many students may not wish to ter, although most readers will find this chapter
study each chapter, or their instructors may not enjoyable. Finally, the student/technician should
choose to assign the study of each chapter. We read Chapter 18 as a final chapter—this chapter
suggest, however, that at least three of the specific provides much information on how to apply the
system chapters be selected for study. Chapter 17 material presented throughout the textbook to a
on alternative power sources, although a generic vehicle that is in your service bay.
Copyright 2011 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part. Due to electronic rights, some third party content may be suppressed from the eBook and/or eChapter(s).
Editorial review has deemed that any suppressed content does not materially affect the overall learning experience. Cengage Learning reserves the right to remove additional content at any time if subsequent rights restrictions require it.
Contents
Preface . . . . . . . . . . . . . . . . . . . . . . . vii Summary . . . . . . . . . . . . . . . . . . . . . . . . . .68
Acknowledgments . . . . . . . . . . . . . . . .xi Diagnostic Exercise . . . . . . . . . . . . . . . . . .69
Review Questions . . . . . . . . . . . . . . . . . . .69
Chapter 1: A Review of Electricity
Chapter 3: Common Components
and Electronics . . . . . . . . . . . . . . . . . . 1
for Computerized Engine
Objectives . . . . . . . . . . . . . . . . . . . . . . . . . .1
Key Terms . . . . . . . . . . . . . . . . . . . . . . . . . .1 Control Systems . . . . . . . . . . . . . . . . . 73
Electrical Circuits versus Objectives . . . . . . . . . . . . . . . . . . . . . . . . .73
Electronic Circuits . . . . . . . . . . . . . . . . . .2 Key Terms . . . . . . . . . . . . . . . . . . . . . . . . .73
Electron Theory . . . . . . . . . . . . . . . . . . . . . .3 Common Features . . . . . . . . . . . . . . . . . .73
Electrical Theory . . . . . . . . . . . . . . . . . . . . .5 Sensing Devices . . . . . . . . . . . . . . . . . . . .76
Electrical Circuits . . . . . . . . . . . . . . . . . . .14 Actuators . . . . . . . . . . . . . . . . . . . . . . . . . .99
Polarity . . . . . . . . . . . . . . . . . . . . . . . . . . .20 System Diagnosis and Service . . . . . . . .102
Circuit Faults . . . . . . . . . . . . . . . . . . . . . . .20 Summary . . . . . . . . . . . . . . . . . . . . . . . . .104
Semiconductors . . . . . . . . . . . . . . . . . . . .22 Diagnostic Exercise . . . . . . . . . . . . . . . . .105
Integrated Circuits . . . . . . . . . . . . . . . . . . .36 Review Questions . . . . . . . . . . . . . . . . . .105
The Digital Age . . . . . . . . . . . . . . . . . . . . .38
Summary . . . . . . . . . . . . . . . . . . . . . . . . . .39 Chapter 4: Common Operating
Diagnostic Exercise . . . . . . . . . . . . . . . . . .39 Principles for Computerized
Review Questions . . . . . . . . . . . . . . . . . . .39 Engine Control Systems . . . . . . . . . . 109
Objectives . . . . . . . . . . . . . . . . . . . . . . . .109
Chapter 2: Computers in Cars . . . . . . 43 Key Terms . . . . . . . . . . . . . . . . . . . . . . . .109
Objectives . . . . . . . . . . . . . . . . . . . . . . . . .43 Fuel Volatility and Fuel Octane . . . . . . . .110
Key Terms . . . . . . . . . . . . . . . . . . . . . . . . .43 Electronic Fuel Injection System
Why Computers? . . . . . . . . . . . . . . . . . . .43 Operating Principles . . . . . . . . . . . . . .111
How Computers Work . . . . . . . . . . . . . . . .47 Ignition System Operating
Functions of the Engine Computer . . . . . .62 Principles . . . . . . . . . . . . . . . . . . . . . .125
Controlling Exhaust Gasses . . . . . . . . . . .64 Emission-Control Systems . . . . . . . . . . .132
Closed-Loop and Open-Loop Variable Valve Timing . . . . . . . . . . . . . . .138
Operation . . . . . . . . . . . . . . . . . . . . . . .65 42 V Systems . . . . . . . . . . . . . . . . . . . . .139
The PCM and Exhaust Emissions . . . . . .67 Summary . . . . . . . . . . . . . . . . . . . . . . . . .141
Attitude of the Technician . . . . . . . . . . . . .67 Diagnostic Exercise . . . . . . . . . . . . . . . . .141
System Diagnosis and Service . . . . . . . . .67 Review Questions . . . . . . . . . . . . . . . . . .141
iii
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iv Contents
Chapter 5: Diagnostic Concepts . . . . 145 Chapter 8: Understanding OBD II . . . 213
Objectives . . . . . . . . . . . . . . . . . . . . . . . .145 Objectives . . . . . . . . . . . . . . . . . . . . . . . .213
Key Terms . . . . . . . . . . . . . . . . . . . . . . . .145 Key Terms . . . . . . . . . . . . . . . . . . . . . . . .213
Types of Faults . . . . . . . . . . . . . . . . . . . .145 CARB/EPA/SAE/OBD Background . . . . .213
Diagnostic Trouble Codes . . . . . . . . . . . .146 Why OBD II? . . . . . . . . . . . . . . . . . . . . . .214
Data Streams . . . . . . . . . . . . . . . . . . . . .147 What Does OBD II Do? . . . . . . . . . . . . . .214
Functional Tests . . . . . . . . . . . . . . . . . . .148 Diagnostic Management Software . . . . .215
Technical Service Bulletins . . . . . . . . . . .148 Standardization . . . . . . . . . . . . . . . . . . . .219
Pinpoint Testing . . . . . . . . . . . . . . . . . . . .148 OBD II Monitors . . . . . . . . . . . . . . . . . . .224
Flowcharts . . . . . . . . . . . . . . . . . . . . . . . .153 The Ten Global Modes of OBD II . . . . . .235
Electrical Schematics . . . . . . . . . . . . . . .155 Cold Start Emissions Reduction . . . . . . .239
Other General Diagnostic Reducing the Escape of HC
Concepts . . . . . . . . . . . . . . . . . . . . . . .155 Emissions During Refueling . . . . . . . .240
Summary . . . . . . . . . . . . . . . . . . . . . . . . .156 OBD III . . . . . . . . . . . . . . . . . . . . . . . . . .241
Diagnostic Exercise . . . . . . . . . . . . . . . . .156 Summary . . . . . . . . . . . . . . . . . . . . . . . . .241
Review Questions . . . . . . . . . . . . . . . . . .156 Diagnostic Exercise . . . . . . . . . . . . . . . . .241
Review Questions . . . . . . . . . . . . . . . . . .241
Chapter 6: Diagnostic Equipment . . . 159
Chapter 9: Multiplexing Concepts . . . 245
Objectives . . . . . . . . . . . . . . . . . . . . . . . .159
Objectives . . . . . . . . . . . . . . . . . . . . . . . .245
Key Terms . . . . . . . . . . . . . . . . . . . . . . . .159
Key Terms . . . . . . . . . . . . . . . . . . . . . . . .245
Scan Tools . . . . . . . . . . . . . . . . . . . . . . . .159
Multiplexing Overview . . . . . . . . . . . . . . .245
Breakout Boxes . . . . . . . . . . . . . . . . . . . .163
Multiplex System Designs . . . . . . . . . . . .248
Non-Powered Test Lights . . . . . . . . . . . .164
Multiplexing Protocols . . . . . . . . . . . . . . .250
Logic Probes . . . . . . . . . . . . . . . . . . . . . .165
Communication on a J1850 VPW
Digital Volt/Ohm Meters . . . . . . . . . . . . . .166
Data Bus . . . . . . . . . . . . . . . . . . . . . . .252
Digital Storage Oscilloscopes . . . . . . . . .175
Communication on a CAN
Safety Considerations When Using
Data Bus . . . . . . . . . . . . . . . . . . . . . . .254
A DVOM or DSO . . . . . . . . . . . . . . . . .190
Multiplexing Variations . . . . . . . . . . . . . . .256
Gas Analyzers . . . . . . . . . . . . . . . . . . . . .191
Fiber Optic Protocols . . . . . . . . . . . . . . .258
Summary . . . . . . . . . . . . . . . . . . . . . . . . .191
Other Bosch Protocols . . . . . . . . . . . . . .258
Diagnostic Exercise . . . . . . . . . . . . . . . . .191
Diagnosis of Multiplexed Circuits . . . . . .259
Review Questions . . . . . . . . . . . . . . . . . .191
Summary . . . . . . . . . . . . . . . . . . . . . . . . .260
Diagnostic Exercise . . . . . . . . . . . . . . . . .260
Chapter 7: Exhaust Gas Analysis . . . 195 Review Questions . . . . . . . . . . . . . . . . . .260
Objectives . . . . . . . . . . . . . . . . . . . . . . . .195
Key Terms . . . . . . . . . . . . . . . . . . . . . . . .195 Chapter 10: General Motors’
Theory of Gas Analysis . . . . . . . . . . . . . .195 Electronic Engine Controls . . . . . . . . 263
Measured Gasses . . . . . . . . . . . . . . . . . .197 Objectives . . . . . . . . . . . . . . . . . . . . . . . .263
Gas Analyzers . . . . . . . . . . . . . . . . . . . . .202 Key Terms . . . . . . . . . . . . . . . . . . . . . . . .263
Diagnosing with the Gasses . . . . . . . . . .206 Powertrain Control Module . . . . . . . . . . .264
Summary . . . . . . . . . . . . . . . . . . . . . . . . .209 Operating Modes. . . . . . . . . . . . . . . . . . .265
Diagnostic Exercise . . . . . . . . . . . . . . . . .209 Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . .267
Review Questions . . . . . . . . . . . . . . . . . .209 Fuel Management Systems . . . . . . . . . .277
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Contents v
Idle Speed Control . . . . . . . . . . . . . . . . .288 Other PCM-Controlled Systems . . . . . . .420
Spark Management Systems . . . . . . . . .290 System Diagnosis and Service . . . . . . . .425
Emission Control Systems . . . . . . . . . . .301 Summary . . . . . . . . . . . . . . . . . . . . . . . . .436
Other PCM-Controlled Systems . . . . . . .310 Diagnostic Exercise . . . . . . . . . . . . . . . . .436
Body Control Module . . . . . . . . . . . . . . .316 Review Questions . . . . . . . . . . . . . . . . . .436
System Diagnosis and Service . . . . . . . .320
PCM, PROM, and CALPAK Service . . . .323 Chapter 13: Ford’s Electronic
Summary . . . . . . . . . . . . . . . . . . . . . . . . .328
Engine Control V (EEC V) . . . . . . . . . 439
Diagnostic Exercise . . . . . . . . . . . . . . . . .328
Objectives . . . . . . . . . . . . . . . . . . . . . . . .439
Review Questions . . . . . . . . . . . . . . . . . .328
Key Terms . . . . . . . . . . . . . . . . . . . . . . . .439
Engine Controls Inputs . . . . . . . . . . . . . .440
Chapter 11: Advanced General
Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . .440
Motors Engine Controls . . . . . . . . . . 331 Fuel Management Systems . . . . . . . . . .443
Objectives . . . . . . . . . . . . . . . . . . . . . . . .331 Idle Speed Control . . . . . . . . . . . . . . . . .446
Key Terms . . . . . . . . . . . . . . . . . . . . . . . .331 Ignition Systems . . . . . . . . . . . . . . . . . . .447
Northstar Engine Overview . . . . . . . . . . .332 Emission Control Systems . . . . . . . . . . .448
Northstar Inputs/Outputs . . . . . . . . . . . . .336 Advanced Ford Computer
Cadillac LH2 Northstar Upgrades . . . . . .347 System Features . . . . . . . . . . . . . . . . .452
Cadillac HFV6 . . . . . . . . . . . . . . . . . . . . .351 Body Control Modules . . . . . . . . . . . . . . .460
GM Generation III Small-Block V8s . . . . .351 Voice Recognition/Navigational
GM Generation IV Small-Block V8s . . . .354 Systems . . . . . . . . . . . . . . . . . . . . . . .461
GM Active Fuel Management AdvanceTrac™ System . . . . . . . . . . . . . .462
System . . . . . . . . . . . . . . . . . . . . . . . .354 EcoBoost Engine . . . . . . . . . . . . . . . . . .463
Flywheel Alternator Starter System . . . .356 CVPI Fire-Suppression System . . . . . . .463
Belt Alternator Starter System . . . . . . . .361 System Diagnosis and Service . . . . . . . .464
Chevrolet Volt . . . . . . . . . . . . . . . . . . . . .363 Summary . . . . . . . . . . . . . . . . . . . . . . . . .465
GM Voice-Recognition/ Navigational Diagnostic Exercise . . . . . . . . . . . . . . . . .466
System . . . . . . . . . . . . . . . . . . . . . . . .364 Review Questions . . . . . . . . . . . . . . . . . .466
System Diagnosis and Service . . . . . . . .365
Summary . . . . . . . . . . . . . . . . . . . . . . . . .366 Chapter 14: Chrysler Corporation
Diagnostic Exercise . . . . . . . . . . . . . . . . .366
Fuel Injection Systems . . . . . . . . . . . 469
Review Questions . . . . . . . . . . . . . . . . . .366
Objectives . . . . . . . . . . . . . . . . . . . . . . . .469
Key Terms . . . . . . . . . . . . . . . . . . . . . . . .469
Chapter 12: Ford’s Electronic Powertrain Control Module . . . . . . . . . . .470
Engine Control IV (EEC IV) . . . . . . . . 371 Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . .475
Objectives . . . . . . . . . . . . . . . . . . . . . . . .371 Fuel Management Systems . . . . . . . . . .488
Key Terms . . . . . . . . . . . . . . . . . . . . . . . .371 Idle Speed Control . . . . . . . . . . . . . . . . .491
Powertrain Control Module . . . . . . . . . . .372 Spark Management Systems . . . . . . . . .492
Operating Modes. . . . . . . . . . . . . . . . . . .373 Emission Control Systems . . . . . . . . . . .495
Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . .379 Other PCM-Controlled Systems . . . . . . .497
Fuel Management Systems . . . . . . . . . .398 Chrysler Multiplexing Systems . . . . . . . .499
Idle Speed Control . . . . . . . . . . . . . . . . .402 Advanced Chrysler Electronic
Spark Management Systems . . . . . . . . .403 Systems . . . . . . . . . . . . . . . . . . . . . . .499
Emission Control Systems . . . . . . . . . . .414 System Diagnosis and Service . . . . . . . .502
Copyright 2011 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part. Due to electronic rights, some third party content may be suppressed from the eBook and/or eChapter(s).
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vi Contents
Summary . . . . . . . . . . . . . . . . . . . . . . . . .505 Chapter 17: Alternative Power
Diagnostic Exercise . . . . . . . . . . . . . . . . .506 Sources . . . . . . . . . . . . . . . . . . . . . . 583
Review Questions . . . . . . . . . . . . . . . . . .506
Objectives . . . . . . . . . . . . . . . . . . . . . . . .583
Key Terms . . . . . . . . . . . . . . . . . . . . . . . .583
Chapter 15: European (Bosch) Honda Insight, Civic, and Accord
Engine Control Systems . . . . . . . . . . 509 Hybrids . . . . . . . . . . . . . . . . . . . . . . . .585
Objectives . . . . . . . . . . . . . . . . . . . . . . . .509 Toyota Hybrid System . . . . . . . . . . . . . . .588
Key Terms . . . . . . . . . . . . . . . . . . . . . . . .509 Ford Escape Hybrid . . . . . . . . . . . . . . . .593
System Overview . . . . . . . . . . . . . . . . . .510 Allison Two-Mode Hybrids . . . . . . . . . . . .595
Continuous Injection System. . . . . . . . . .513 Fuel Cell Vehicles . . . . . . . . . . . . . . . . . .595
Pulsed Systems . . . . . . . . . . . . . . . . . . .514 Flexible Fuel Vehicles . . . . . . . . . . . . . . .599
Motronic . . . . . . . . . . . . . . . . . . . . . . . . .516 System Diagnosis and Service . . . . . . . .600
Electronic Control Unit . . . . . . . . . . . . . .516 Summary . . . . . . . . . . . . . . . . . . . . . . . . .601
Operating Modes. . . . . . . . . . . . . . . . . . .519 Diagnostic Exercise . . . . . . . . . . . . . . . . .601
Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . .521 Review Questions . . . . . . . . . . . . . . . . . .601
Outputs . . . . . . . . . . . . . . . . . . . . . . . . . .524
Bosch Obd II Update . . . . . . . . . . . . . . . .533 Chapter 18: Approach
System Diagnosis and Service . . . . . . . .534 to Diagnostics . . . . . . . . . . . . . . . . . 605
Summary . . . . . . . . . . . . . . . . . . . . . . . . .535
Objectives . . . . . . . . . . . . . . . . . . . . . . . .605
Diagnostic Exercise . . . . . . . . . . . . . . . . .535
Key Terms . . . . . . . . . . . . . . . . . . . . . . . .605
Review Questions . . . . . . . . . . . . . . . . . .535
Narrowing Down the Area
of the Problem . . . . . . . . . . . . . . . . . .605
Chapter 16: Asian Computer Pinpoint Testing . . . . . . . . . . . . . . . . . . . .609
Control Systems . . . . . . . . . . . . . . . . 539 Diagnosing Intermittent Symptoms . . . . .614
Objectives . . . . . . . . . . . . . . . . . . . . . . . .539 Testing Catalytic Converters . . . . . . . . . .615
Key Terms . . . . . . . . . . . . . . . . . . . . . . . .539 EVAP System Tests . . . . . . . . . . . . . . . . .618
Nissan: Electronic Concentrated Diagnosing Air/Fuel Ratio Problems . . . .620
Control System (ECCS) . . . . . . . . . . .540 Diagnosing an Emission
Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . .542 Test Failure . . . . . . . . . . . . . . . . . . . . .623
Outputs . . . . . . . . . . . . . . . . . . . . . . . . . .549 Reprogramming a Computer . . . . . . . . . .626
System Diagnosis and Service . . . . . . . .553 The Three Essential Tools of Electronic
Toyota Computer-Controlled System Diagnosis . . . . . . . . . . . . . . . .629
System (TCCS) . . . . . . . . . . . . . . . . . .554 Other Diagnostic Resources . . . . . . . . . .630
Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . .554 Summary . . . . . . . . . . . . . . . . . . . . . . . . .630
Outputs . . . . . . . . . . . . . . . . . . . . . . . . . .557 Diagnostic Exercise . . . . . . . . . . . . . . . . .631
System Diagnosis and Service . . . . . . . .564 Review Questions . . . . . . . . . . . . . . . . . .631
Honda: Programmed Fuel
Appendix A: Terms and Acronyms . . . 635
Injection (PGM-FI) . . . . . . . . . . . . . . .565
Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . .565
Appendix B: Automotive-Related
Outputs . . . . . . . . . . . . . . . . . . . . . . . . . .569
Honda’s VTEC Systems . . . . . . . . . . . . .573 Web Addresses . . . . . . . . . . . . . . . . 643
System Diagnosis and Service . . . . . . . .578
Summary . . . . . . . . . . . . . . . . . . . . . . . . .579 Glossary . . . . . . . . . . . . . . . . . . . . . 645
Diagnostic Exercise . . . . . . . . . . . . . . . . .579
Review Questions . . . . . . . . . . . . . . . . . .579 Index . . . . . . . . . . . . . . . . . . . . . . . 663
Copyright 2011 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part. Due to electronic rights, some third party content may be suppressed from the eBook and/or eChapter(s).
Editorial review has deemed that any suppressed content does not materially affect the overall learning experience. Cengage Learning reserves the right to remove additional content at any time if subsequent rights restrictions require it.
