Automotive Computer Controlled Systems

Front Cover......Page 1
Automotive Computer Controlled Systems: Diagnostic tools and techniques......Page 4
Copyright Page......Page 5
Contents......Page 6
Preface......Page 10
Acknowledgements......Page 12
1.1 Common technology......Page 14
1.3 Ignition systems......Page 15
1.4 Computer controlled petrol fuelling systems......Page 23
1.5 Engine management systems (EMS)......Page 30
1.6 Anti-lock braking (ABS)......Page 32
1.7 Traction control......Page 35
1.8 Stability control......Page 38
1.9 Air conditioning......Page 40
1.11 Computer controlled diesel engine management systems......Page 43
1.13 Review questions......Page 51
2.1 The fundamental parts of a computer......Page 53
2.2 A practical automotive computer system......Page 54
2.3 Principles of operation......Page 57
2.4 Computer data......Page 58
2.5 Computer interfaces......Page 59
2.6 Control of output devices......Page 60
2.7 Computer memories......Page 61
2.9 Adaptive operating strategy of the ECM......Page 64
2.10 Networking of computers......Page 65
2.11 Vehicle network sytems......Page 68
2.12 Prototype network systems......Page 72
2.13 Summary......Page 75
2.14 Review questions......Page 76
3.1 Access to DTCs......Page 78
3.2 Developments in self-diagnosis......Page 91
3.3 Diagnostic equipment and limitations of DTCs......Page 94
3.4 Review questions......Page 96
4.1 Diagnostic tools that connect to the ECM......Page 98
4.2 Breakout boxes......Page 107
4.3 The digital multimeter......Page 108
4.4 Portable flat screen oscilloscopes......Page 109
4.5 Diagnostic tool and oscilloscope combined......Page 110
4.6 Pressure gauges......Page 112
4.9 Sources of diagnostic data......Page 116
4.10 Exhaust gas emissions and emission system testing......Page 118
4.11 Review questions......Page 123
5.1 Electromagnetic sensors......Page 125
5.2 Optical sensors......Page 131
5.3 Combustion knock sensors......Page 132
5.4 Variable resistance type sensors......Page 134
5.5 Temperature sensors......Page 137
5.6 Ride height control sensor......Page 138
5.7 Manifold absolute pressure (MAP)......Page 139
5.8 Exhaust gas oxygen sensors......Page 143
5.9 Air flow measurement......Page 151
5.11 Review questions......Page 157
6.1 Actuator operation......Page 159
6.2 Petrol engine fuel injectors......Page 160
6.3 Testing of petrol injectors......Page 162
6.4 Exhaust gas recirculation......Page 167
6.5 Petrol engine idle speed control......Page 168
6.7 ABS actuators......Page 174
6.8 A clamping diode......Page 175
6.9 Electronic unit injectors......Page 176
6.10 Review questions......Page 178
7.1 Circuit testing......Page 181
7.2 Vehicle specific details......Page 185
7.3 The ‘six-steps’ approach......Page 186
7.4 Skills required for effective diagnosis......Page 187
7.5 An approach to fault finding......Page 188
7.6 Emissions related testing......Page 192
7.7 Ignition system tests......Page 211
7.8 Diesel injection......Page 213
7.9 Sensor tests on other systems......Page 215
7.10 Intermittent faults......Page 220
7.11 Summary......Page 222
7.12 Review questions......Page 223
8.1 Partial and absolute pressures......Page 225
8.2 The piezoelectric effect......Page 226
8.3 Liquid crystal displays......Page 227
8.5 Logic devices......Page 229
8.6 OBD II......Page 236
8.8 Supplementary restraint systems (SRS)......Page 240
8.9 The coded ignition key......Page 244
8.11 Precautions when working with computer controlled systems......Page 245
8.12 Variable capacitance sensor......Page 246
8.13 Optoelectronics......Page 247
8.14 Review questions......Page 248
A.2 Answers to review questions......Page 250
A.3 OBD II standard fault codes......Page 251
Index......Page 262