1. The working power supply and grounding circuit of the reversing radar system are not lit. The reversing radar system is not activated. The common fault reason is that the parking assistance condition is not met, that is, the vehicle is in parking state or trailer mode, and the reversing radar needs to be replaced or reactivated.

2. The radar system indicates a fault. When the parking function is used, the radar system will prompt a fault. Fault diagnosis is that the probe is faulty or the line from the probe to the controller is abnormal, so a new controller or probe is replaced.

3. Fault phenomenon. When using the parking function, the radar will also give an alarm if there is no obstacle. Fault diagnosis is probe failure or probe surface is not clean. Common faults include probe damage, water drops or dirt on the surface of the probe, and cleaning the dirt is enough.