The wire connector is a socket connected to the wiring harness. All sensor terminals use special interfaces. The connection between the control computer ECU and all external components is through the connector on the ECU, and the signal transfer in the wiring harness is also used. line connector. It can be considered that in an electronically controlled car, the control computer ECU is the control center, and the wiring harness is the neural network of the control system. Then, the wire connector is the relay station of the circuit wiring harness. However, in addition to the convenience of installation and accurate wiring, the connector often fails in use, and the most common failure is poor contact, which leads to the interruption of "network" signal transmission, which directly affects the good performance of electronically controlled vehicles. play normally. Wire and connector open circuit.

The wire and connector open circuit fault may be caused by the wire being broken during use, the connector being in poor contact, and the connector terminal being loose.

Since it is very rare for the wire to be disconnected in the middle, most of it is disconnected at the connector. Therefore, the inspection should focus on carefully checking the sensor and the wire where the connection is located, whether there is looseness and poor contact.

The open circuit fault of the connector caused by poor contact is often caused by the corrosion of the connector end, and the external dirt entering the terminal or connecting socket, resulting in a decrease in contact pressure. At this time, as long as the connector is removed, and then re-inserted to change its connection status, it can return to normal contact.