According to the impact on the driving performance of the car, the automotive electronic products can be summarized into two categories: one is the automotive electronic control device, the automotive electronic control device to cooperate with the mechanical system on the car, that is, the so-called "electromechanical combination" of automotive electronic devices; They include engine, chassis, body electronic control. For example, electronic fuel injection system, brake anti-lock control, anti-slip control, traction control, electronic control suspension, electronic control automatic transmission, electronic power steering, etc., the other is the vehicle electronic device, vehicle electronic device is in the vehicle environment can be used independently of the electronic device, it and the performance of the car itself is not directly related. They include automobile information system (vehicle computer), navigation system, automobile audio and TV entertainment system, vehicle communication system, Internet equipment, etc.
In 2008, the direction of electronic technology development is to centralized integrated control development: the engine management system and automatic transmission control system are integrated into the power transmission system integrated control (PCM); The braking anti-lock control system (ABS), traction control system (TCS) and drive anti-slip control system (ASR) were integrated together for braking control. Through the central chassis controller, the brake, suspension, steering, power transmission and other control systems are connected through the bus. Through complex control operation, the controller coordinates each subsystem to control the vehicle driving performance to the best level, and forms the Integrated Chassis control System (UCC).
Due to the rapid increase in the number of electronic and electrical devices on automobiles, in order to reduce the number and weight of connecting wires, network and bus technology have been greatly developed during this period. Bus technology is to connect various automotive electronic devices into a network, sending and receiving information through the data bus. Electronic devices can not only complete their own control functions independently, but also provide data services for other control devices. Because of the use of network design, simplified wiring, reduced the number of electrical nodes and the amount of wire, so that the assembly work is more simplified, but also increased the reliability of information transmission. Any electronic control device can be accessed through the data bus, and the fault code can be read to diagnose the fault, which makes the maintenance of the whole vehicle simpler.