The repair method of body control module failure mainly includes the following steps:
Read fault code: Use professional equipment such as OBD-II scanner to read the fault code of the body control module, which helps to determine the specific cause of the fault. Technicians can use a multimeter to detect whether there is a short circuit in the body control module's line and check whether the connection line is damaged or virtual. 12
Check hardware: According to the fault code, check whether the hardware of the body control system, such as sensors, relays, etc., is damaged or faulty. If damaged parts are found, they need to be replaced. Common causes of hardware failure include burnout of double-filament bulbs, damage to brake lights or trunk manual switches, etc.
Update software: If the fault code points to a software problem, the body control module's software may need to be upgraded. This can usually be done by the car's manufacturer and is recommended to be done at a professional 4S shop or repair organization. 34
Reprogramming: In some cases, the body control module may need to be reprogrammed to match the new software version. This requires professional diagnostic equipment and technology. 3
Check the line: Check whether the power supply, grounding and communication lines of the control module are normal. Faulty wiring may cause problems with the module, and checking these wiring can usually solve the problem. 14
Replace a damaged module: If the electronic control module has been damaged, it must be replaced with a new one. These operations should be performed by experienced technicians, as they require an in-depth inspection of the details of the electrical system and the electronic control module.