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Common diagnostic methods for automotive circuits and electrical faults

There are many ways to diagnose automotive circuits and electrical faults. The following car maintenance will give you a summary. As for when to use which diagnosis method, you will know more after reading it, and those who do not understand will consider it carefully.

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Discussion on the Research Focus and Key Technology of Automobile Bus

The research and development of automobile bus system can be divided into three stages: the first stage is to study the basic control system of automobile (also known as comfort bus system), such as lighting, power windows and centralized control lock. The second stage studies the main control system of the car (also called the power bus system), such as the electronic injection ECU control system, ABS system, automatic transmission, etc. The third stage studies the integration, real-time control and information feedback between various electronic control systems of automobiles.

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Description of basic vehicle circuit diagram

Due to the different drawing methods, symbol labels, text labels and technical standards of automobile circuit diagrams in different countries, the automobile circuit diagrams drawn by automobile manufacturers vary greatly. Therefore, before reading different series of car circuit diagrams, you need to understand the characteristics of the circuit diagrams and master the knowledge of car circuit diagrams. The basic method of reading. Be familiar with the drawing rules of automobile circuit diagram

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How the engine regulates power generation

Due to the different drawing methods, symbol labels, text labels and technical standards of automobile circuit diagrams in different countries, the automobile circuit diagrams drawn by automobile manufacturers vary greatly. Therefore, before reading different series of car circuit diagrams, you need to understand the characteristics of the circuit diagrams and master the knowledge of car circuit diagrams. The basic method of reading. Be familiar with the drawing rules of automobile circuit diagram

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Fault caused by ECU of electronic control engine computer

The electronic control engine computer ECU cannot monitor the failure caused by the following reasons. (1) Generally, the ECU of low-end cars cannot monitor the failure of the high-voltage ignition circuit caused by the ignition coil not working, the spark plug is contaminated or damaged, and the high-voltage wire core is broken. (2) ECU cannot monitor the blockage of the intake filter and fuel filter pipeline of the electric gasoline pump, and the fuel inlet failure caused by the flattening of the intake pipe or return pipe.

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Function and composition of engine block

Body group function The body assembly is the support of the engine and the assembly base of the crank connecting rod mechanism, valve mechanism and main components of the engine system. The cylinder head is used to close the top of the cylinder and forms the combustion chamber together with the top of the piston and the cylinder wall. In addition, the water jacket, oil passage and oil pan in the cylinder head and cylinder block are part of the cooling system and lubrication system respectively.

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