Faults with the board-to-board connectors may also be caused by short circuits between the wire harness and terminals, or internally within the switches. Since it is rare for faults to occur with the wire being cut in the middle, they are usually found at the connector.
Therefore, during the inspection, pay close attention to the sensors and the wiring at the connection points for any loose connections or poor contact. Before inspecting, first ensure that the terminals on the outside are securely fastened, and then proceed with the following steps for testing. It is also important to note that for most wire connectors, the back end should maintain the connector insertion, but for waterproof connector bars, it is impossible to insert the back end as a slight mistake can easily be made.
Faulty terminal connection breakage due to poor contact is often caused by corrosion at the terminal end, with external dirt entering the terminal or connector socket, resulting in reduced contact pressure.
Open circuit faults in wires and connectors may be caused by broken wires or loose connector terminals.
First, disconnect the wiring terminals on both sides of the control computer ECU and sensors, then measure the resistance between the corresponding terminals of the terminals. If the resistance value is not greater than 1 ohm, it indicates that the wire is normal, allowing for the next step in the inspection. At this point, simply remove and reinsert the connector to change its connection status and restore normal contact. It is important to gently摇动 the wire in both vertical and horizontal directions while measuring wire resistance to improve the accuracy of the measurement.
Remove the wire terminal connectors on both sides of the controller and sensors, then measure the resistance between each terminal block on both connectors and the body. During measurement, connect one end of the meter to the body with iron, and measure on both sides of the wire joints with the other end. If the resistance value is greater than 0.5 ohms, it indicates that there is no short-circuit fault between the wire and the body.
