The new generation Buick LaCrosse...

        A new-generation 2021 Buick LaCrosse with a mileage of about 21,000 kilometers. The car owner reported that the car's central door lock failed and did not work. Using the central door lock switch and remote control in the car to unlock and lock the doors does not work. Gu Chen Diagnosis: After receiving the vehicle, I asked the customer when the fault occurred. The customer said that the fault occurred and came for repair. The test drive confirmed the customer's description. When using the remote control to unlock and lock the car doors, it was found that the door locks did not move. When the central lock button in the car was used, the door locks also did not move. Verification results show that the problem described by the customer is true. A preliminary inspection was conducted on the vehicle to check whether the vehicle's appearance and doors had been repaired, and whether the OBD socket and BCM had been installed in the vehicle. No abnormalities were found. Use a fault diagnostic tool to detect, connect the diagnostic tool (GDS) to the vehicle, read the fault codes, and find that there are B3125 and other fault codes for door locks and U1530 and other LIN line fault codes for power windows in the body module.