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Dec 4, 2017

EBOOK - Advanced automotive fault diagnosis (Tom Denton)


EBOOK - Chẩn đoán lỗi của xe ô tô (Tom Denton) - 288 Trang.

The aspect I still enjoy most about working on vehicles is being able to diagnose a fault that has beaten others! This skill takes a few years to develop but it is worth the effort. Diagnostic work is much like that of a detective solving a difficult crime, all the clues are usually there – if you know
where to look. I think it was Sherlock Holmes (a fictional detective if you have never heard of him!) who said:
When you have eliminated all which is impossible, then whatever remains, however improbable, must be the truth. This is a great thought for a diagnostic technician to keep in mind.
To help you learn ‘where to look’ for the clues and to eliminate the impossible, this book combines some aspects of automotive technology covered in my other books. However, it goes much further with a new approach to the art of diagnostics as a science.


1 Introduction 1
1.1 ‘If it ain’t broke, don’t fix it!’ 1
1.2 Safe working practices 1
1.3 Terminology 2
1.4 Report writing 3
2 Diagnostic techniques 6
2.1 Introduction 6
2.2 Diagnostic process 6
2.3 Diagnostics on paper 8
2.4 Mechanical diagnostic techniques 9
2.5 Electrical diagnostic techniques 12
2.6 Fault codes 17
2.7 Systems 18
2.8 On- and off-board diagnostics 20
2.9 Data sources 21
3 Tools and equipment 25
3.1 Basic equipment 25
3.2 Oscilloscopes 28
3.3 Scanners/fault code readers 30
3.4 Engine analysers 32
4 Oscilloscope diagnostics 40
4.1 Introduction 40
4.2 Sensors 40
4.3 Actuators 49
4.4 Ignition system 54
4.5 Other components 58
4.6 Summary 60
5 On-board diagnostics 61
5.1 On-board diagnostics – a first perspective 61
5.2 What is on-board diagnostics? 63
5.3 Petrol/gasoline on-board diagnostic monitors 66
5.4 On-board diagnostics – a second perspective 74
5.5 Summary 84
6 Sensors and actuators 86
6.1 Introduction 86
6.2 Sensors 86
6.3 Actuators 94
vi Contents
7 Engine systems 98
7.1 Introduction 98
7.2 Engine operation 98
7.3 Diagnostics – engines 101
7.4 Fuel system 103
7.5 Diagnostics – fuel system 106
7.6 Introduction to engine management  108
7.7 Ignition 108
7.8 Diagnostic – ignition systems 116
7.9 Emissions 120
7.10 Diagnostics – emissions 122
7.11 Fuel injection 122
7.12 Diagnostics – fuel injection systems 126
7.13 Diesel injection 127
7.14 Diagnostics – diesel injection systems 130
7.15 Engine management 132
7.16 Diagnostics – combined injection and fuel control systems 138
7.17 Engine management and faultfinding information 143
7.18 Air supply and exhaust systems 144
7.19 Diagnostics – exhaust and air supply 147
7.20 Cooling 148
7.21 Diagnostics – cooling 150
7.22 Lubrication 151
7.23 Diagnostics – lubrication 153
7.24 Batteries 155
7.25 Diagnosing battery faults 156
7.26 Starting 159
7.27 Diagnosing starting system faults 163
7.28 Charging 163
7.29 Diagnosing charging system faults 167
8 Chassis systems 169
8.1 Brakes 169
8.2 Diagnostics – brakes 172
8.3 Anti-lock brakes 174
8.4 Diagnostics – anti-lock brakes 177
8.5 Traction control 178
8.6 Diagnostics – traction control 180
8.7 Steering and tyres 181
8.8 Diagnostics – steering and tyres 186
8.9 Suspension 190
8.10 Diagnostics – suspension 195
9 Electrical systems 197
9.1 Electronic components and circuits 197
9.2 Multiplexing 200
9.3 Lighting 203
9.4 Diagnosing lighting system faults 207
9.5 Auxiliaries 209
9.6 Diagnosing auxiliary system faults 214
9.7 In car entertainment (ICE) security and communications 216
9.8 Diagnosing ICE, security and communication system faults 219
9.9 Body electrical systems 221
9.10 Diagnosing body electrical system faults 225
9.11 Instrumentation 226
9.12 Diagnosing instruments system faults 230
9.13 Heating, ventilation and air conditioning (HVAC) 231
9.14 Diagnostics – HVAC 237
9.15 Cruise control 239
9.16 Diagnostics – cruise control 240
9.17 Air bags and belt tensioners 241
9.18 Diagnostics – air bags and belt tensioners 244
10 Transmission systems 247
10.1 Manual transmission 247
10.2 Diagnostics – manual transmission 251
10.3 Automatic transmission 253
10.4 Diagnostics – automatic transmission 256
11 Conclusion, web resources and developments 260
11.1 Introduction 260
11.2 Web contacts 260
11.3 Future developments in diagnostic systems 262
11.4 Software 263
11.5 Summary 265

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