Do junior high school students need to supplement basic knowledge when learning automobile electronic control maintenance technology?

We can start from the following aspects.

Automobile electrical equipment includes: automobile power supply system, starting system, ignition system, lighting and signal system, automobile instrument system and auxiliary electrical system. The circuit and maintenance of automobile electrical equipment mainly includes the maintenance and daily maintenance of electrical equipment and circuit system.

1. The wires from the power supply to the fuses or switches of various electrical appliances are the live wires of electrical equipment. In the circuit schematic diagram, it is usually drawn in the upper part of the circuit diagram.

2. Draw the circuit diagram according to the standard, and the contacts of the switch are at zero or static. That is, the switch is in the off state or the relay coil is in the off state, and the on-off of elements with switching characteristics such as transistors and thyristors depends on the specific situation.

3. The automobile circuit is characterized by dual power supply and single wire system, all electrical appliances are connected in parallel, and relays and switches are connected in series in the circuit.

Most electrical equipment is protected by fuse.

5. The whole vehicle circuit is divided into several independent circuit systems according to its function and working principle. This can solve the problems of huge and complex circuit and difficult vehicle analysis.