Item ⅠFundamentals of Automobile Electrical Equipment001
Ⅰ.Scene Introduction001
Ⅱ.Related Knowledge001
(Ⅰ)Composition of automobile electrical equipment001
(Ⅱ)Characteristics of the automobile electrical equipment002
(Ⅲ)Basic methods of diagnosing the faults of automobile electrical equipment003
(Ⅳ)Testing instruments and tools commonly used in the maintenance of the automobile electrical equipment004
Ⅲ.Item Implementation005
(Ⅰ)Use of commonly used measuring instruments and tools005
(Ⅱ)Implementation steps006
Ⅳ.Knowledge and Skills Expansion009
(Ⅰ)Basic components of the automobile electrical equipment009
(Ⅱ)Electronic components commonly used in automobile circuits016
Summary017
Thinking and Practice017
Item ⅡTest and Maintenance of Battery018
Ⅰ.Scene Introduction018
Ⅱ.Related Knowledge018
(Ⅰ)Function and type of battery018
(Ⅱ)Installation position of the battery018
(Ⅲ)Structure of the battery019
(Ⅳ)Working principle of the battery021
(Ⅴ)Technical parameters of the battery022
(Ⅵ)Model of battery023
(Ⅶ)Maintenance-free battery024
(Ⅷ)Common failures and troubleshooting of batteries026
Ⅲ.Item Implementation028
(Ⅰ)Safe use，inspection，maintenance，charging and testing of the battery028
(Ⅱ)Implementation steps028
Ⅳ.Knowledge and Skills Expansion032
(Ⅰ)Battery cut-off protection device of the battery032
(Ⅱ)Battery monitoring device032
Summary033
Thinking and Practice033
Item ⅢOverhaul of Charging System034
Ⅰ.Scene Introduction034
Ⅱ.Related Knowledge034
(Ⅰ)Overview of charging system034
(Ⅱ)Construction of alternator035
(Ⅲ)Working principle of alternator041
(Ⅳ)Voltage regulator046
(Ⅴ)Use and maintenance of alternator and voltage regulator052
(Ⅵ)Fault diagnosis of charging system053
Ⅲ.Item Implementation057
(Ⅰ)Maintenance requirements for the charging system057
(Ⅱ)Implementation steps057
Ⅳ.Knowledge and Skills Expansion063
(Ⅰ)Other types of generators063
(Ⅱ)Circuit diagrams of the generators of some brand automobiles066
(Ⅲ)Power management system066
Summary070
Thinking and Practice070
Item ⅣMaintenance of Starting System071
Ⅰ.Scene Introduction071
Ⅱ.Related Knowledge071
(Ⅰ)Overview of starting system071
(Ⅱ)Construction of starter073
(Ⅲ)DC motor073
(Ⅳ)Transmission mechanism and control mechanism of starter078
(Ⅴ)Control circuit of starter082
(Ⅵ)Correct use of the starter085
Ⅲ.Item Implementation085
(Ⅰ)Requirements for the implementation of the starting system085
(Ⅱ)Implementation steps085
Ⅳ.Knowledge and Skills Expansion095
(Ⅰ)Structure of deceleration starter095
(Ⅱ)Start/stop system097
Summary099
Thinking and Practice099
Item ⅤMaintenance of Ignition System100
Ⅰ.Scene Introduction100
Ⅱ.Related Knowledge100
(Ⅰ)Overview of ignition system100
(Ⅱ)Basic construction and overhaul of the ignition system102
(Ⅲ)Construction and maintenance of computer-controlled ignition system112
Ⅲ.Item Implementation126
(Ⅰ)Implementation requirements126
(Ⅱ)Implementation Steps126
Summary127
Thinking and Practice127
Item ⅥOverhaul of Automobile Lighting System128
Ⅰ.Scene Introduction128
Ⅱ.Related Knowledge128
(Ⅰ)Function，type and basic composition of the lighting and signal systems128
(Ⅱ)Automobile lighting system129
(Ⅲ)Automobile signaling system134
Ⅲ.Item Implementation139
(Ⅰ)Analysis of the circuit diagram of the control system for the headlight of the Volkswagen Bora and overhaul139
(Ⅱ)Maintenance and fault diagnosis of headlight146
(Ⅲ)Adjustment of electric horn150
Ⅳ.Knowledge and Skills Expansion151
(Ⅰ)Active steering system of lights151
(Ⅱ)Variable lighting distance of Audi A8152
(Ⅲ)LIN bus circuit for automobile light switch154
Summary154
Thinking and Practice155
Item ⅦMaintenance of Information Display System156
Ⅰ.Scene Introduction156
Ⅱ.Related Knowledge156
(Ⅰ)Automobile instrument system156
(Ⅱ)Automobile alarm information system168
Ⅲ.Item Implementation172
(Ⅰ)Fault diagnosis of coolant thermometer172
（Ⅱ）Fault diagnosis of fuel gauge173
（Ⅲ）Fault diagnosis of electronic speedometer173
Ⅳ.Knowledge and Skills Expansion174
(Ⅰ)The Audi multimedia interactive system174
(Ⅱ)Head-up display system174
(Ⅲ)Electronic oil level height indication175
(Ⅳ)Electronic park brake system（EPB）176
(Ⅴ)Touch display system177
Summary177
Thinking and Practice178
Item ⅧOverhaul of Automobile Auxiliary Electrical System179
Ⅰ.Scene Introduction179
Ⅱ.Related Knowledge179
(Ⅰ)Composition and classification of electric wiper179
(Ⅱ)Working principle of wiper system181
(Ⅲ)Composition of the cleaning system185
(Ⅳ)Maintenance and troubleshooting of electric wiper and cleaner186
(Ⅴ)Composition and structure of electric windows188
(Ⅵ)Working principle of electric window189
(Ⅶ)Fault diagnosis of electric window193
Ⅲ.Item Implementation193
(Ⅰ)Overhaul of automobile auxiliary electrical system193
(Ⅱ)Implementation steps193
Ⅳ.Knowledge and Skills Expansion200
(Ⅰ)Window defrost device200
(Ⅱ)Electric seat200
(Ⅲ)Electric rear-view mirror204
(Ⅳ)Central control door lock system205
Summary207
Thinking and Practice208
Item ⅨAnalysis of Circuit Diagram of Automobile
Electrical System209Ⅰ.Scene Introduction209
Ⅱ.Related Knowledge209
(Ⅰ)Type of automobile circuit diagram209
(Ⅱ)Common graphic symbols，letter symbols and signs212
(Ⅲ)Key points for drawing and reading automobile circuits227
(Ⅳ)Common knowledge of automobile circuit overhaul232
Ⅲ.Item Implementation234
(Ⅰ)Analysis of decomposing the general automobile circuit diagram234
(Ⅱ)Implementation steps234
Ⅳ.Knowledge and Skills Expansion240
Summary243
Thinking and Practice243
Preface
In recent years，the automobile industry in China has developed rapidly，and the automobile parc has continued to grow.What the high-speed growth of automobile parc brings about is a rapid increase in the demand for automobile professionals.Automobile electrical equipment overhaul is not only a necessary skill of automobile maintenance personnel，but also a required core course of automobile maintenance majors in higher vocational colleges.According to the teaching requirements of vocational colleges，this book systematically introduces the basic knowledge of automobile electrical system，automobile electrical structure，working principle，maintenance，fault diagnosis and elimination，etc.，which must be mastered by senior automobile maintenance technicians.Highlighting the idea of“taking ability training as the first”and adopting the writing mode of integrating theory and practice is more in line with the needs of modern vocational and technical education curriculum development.
The book is divided into 9 items，involving fundamentals of automobile electrical equipment，automobile battery，charging system，starting system，ignition system，automobile lighting system，information display system，automobile auxiliary electrical system and automobile electrical system circuit diagram analysis.
This book，according to the students’ cognitive law，pays attention to the characteristics of vocational education，aims at training the students’ automobile electrical maintenance skills，and mainly covers the knowledge of basic maintenance of automobile electrical system.In this book，many practical pictures are added to introduce the knowledge of automobile maintenance to promote students’ understanding of what they have learned and enhance their interest in learning.
This book is edited by Bin Fang of Tianjin Communications vocational college， of which Fang bin of Tianjin Communications Vocational College compiles item Ⅰ， item Ⅱ， item Ⅲ and item Ⅳ， Jiaze Li of Tianjin Communications Vocational College compiles item Ⅴ， item Ⅵ and item Ⅶ， and Ruijing Zhang of Tianjin Communications Vocational College compiles item Ⅷ and item Ⅸ.
Due to my limited knowledge，it is inevitable that there is something improper in the book.I sincerely hope that the readers shall correct it.
Editor
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