According to the working principle of the automobile electrical system, the schematic diagram of the automobile circuit can be divided into: the schematic diagram of the electronic control circuit and the schematic diagram of the non-electronic control circuit.
If it is a schematic diagram of an electronic control circuit, the electronic control unit can be used as the core, and the circuit schematic diagram can be divided into four parts, namely:
●Electronic control unit signal input circuit
●The working circuit of the actuator
●Electric control unit power supply circuit
●Other electrical equipment circuit
If it is a schematic diagram of a non-electrically controlled circuit, you can start with the electrical appliance, and then find the controller according to the electrical appliance. If the controller is a relay, it is necessary to analyze the relay coil circuit first, and then analyze the electrical circuit of the relay control.
It should be noted that the relay sometimes controls more than one electrical appliance, and the circuits should be distinguished at this time. In the circuit diagram, both the relay and the control switch are disconnected and stopped.