A Land Rover Range Rover Sport Utility Vehicle with a mileage of about 80 thousand km and a L320 of L320. User response: the information display indicates that the tire pressure monitoring system fails. Inspection and analysis: when the maintenance personnel pick up the car, the tire is reported to be on the alert. The tire pressure data of each tire are read through the display screen, and it is found that the left front wheel is only 190 kPa, which is low. The alarm lamp is extinguished after the air is supplied to the wheel, which indicates that the tire pressure monitoring system is working normally. The tire pressure monitoring control unit is detected, and there is a fault indication that the right rear tire pressure is not monitored. This inspection result reminds the maintenance personnel that the problems reflected by users are accidental faults. After the fault code is cleared, the vehicle receiving and sending device and tyre of the 2 tire pressure signal will be adjusted at the same time, and then the road test will be carried out. After running for 60 km, the tire pressure monitoring system fault indicator appears again. The tire pressure monitoring control unit is detected, and the fault code is the same as the original one. This shows that the problem lies in the line connection between the tire pressure monitoring control unit and the vehicle signal transceiver. According to the circuit diagram, the conductivity of the line between the tire pressure monitoring control unit and the vehicle signal transceiver is measured. The sloshing wire found that there was intermittent break between the lines between C2447-7 and C2200-1. After disconnecting the right rear trim panel, it was found that the wiring harness of the vehicle transceiver device was bitten by a mouse. Troubleshooting: repair wiring harness, troubleshooting trial run.