Modern electronic control devices for cars due to increasing its number of connecting wires inevitably has shown an increasing trend, in order to ensure the correctness and reliability of the wire connections, wire connectors played a very important role. Socket of the wire connector is a continuous cable bundle, and all sensor terminal block using a dedicated interface, control computer ECU and all parts of the external connections are configured via the connector on the ECU, and signal transfer in the wire harness using the wire connector. It may be argued that, in electric vehicles, control computer ECU central control, wiring harness is a neural network control system, then the wire harness connector is circuit relay stations. However, the connectors in addition to ease of installation, wiring other than accurate, also often fail in use, and the most common failure was poor contact leading to "network" interruption of signal transmission, direct impact on the performance of electric vehicles well normal play. Wires and connectors of wires and connectors circuit breaker circuit breaker failure may be due to breaking of the wire used in the, poor contact between connector and connector Terminal loose making.

As the conductor break in the middle of the fault is very rare, mostly in the connector is disconnected, so checks should focus on carefully check the sensor wire and connect Shun Department whether there is loose and poor contact. Circuit breaker failure caused by poor contact between connector, is often due to the connector end of the rusting, dirt entering the terminals or connections from the outside outlet, resulting in reduced contact pressure. At this point, as long as the connector removed, replace the plug, to change its connection status, make it resume normal contact. Wires and connectors short-circuit fault fault of wires and connectors may also be due to the wiring harness and body (ground) or between the relevant switching of internal short circuit. Check wire connections should first look at the body before holding is solid, then you can follow these steps to test.

(1) check the wires breaking first disassemble the control computer ECU and sensor wire connector on both sides, and then measure the resistance between the corresponding terminals of the connector. If the resistance value is less than 1 ohm, then wire properly, so that next check. In measurement wire resistance Shi, best in vertical and level two a direction gently shake wire to improve measurement of accuracy, while attention, on most wire connection manager, and million with table table rod from connection manager of Hou end insert, but for with waterproof set of waterproof type connection manager table rod on cannot from Hou end insert, because in insert Shi slightly does not carefully will will makes Terminal deformation.

(2) short-circuit resistance checks first, remove the control computer ECU and sensor wire connector on both sides, measuring connectors on both sides between the various terminals and body resistance.