Why is the Lexus reversing radar not beeping?

[RuthFitz]

There may be three reasons: whether the radar host wire is loose; the buzzer is damaged; or the wiring at the bumper is damaged. Here are the detailed explanations: 1. Whether the radar host wire is loose: If you find that the reversing radar is not beeping, first check whether the power cord of the host is properly connected and whether there is current; then check whether the radar host wire is loose. If neither of these is the problem, the issue may lie with the radar itself. 2. Buzzer damage: If the problem is confirmed to be with the reversing radar, the first possibility to consider is that the buzzer is damaged. In this case, you need to purchase and install a new buzzer; also, recall whether your car has undergone any recent modifications. If so, it is possible that the reversing radar wiring was damaged during the modification process. In this case, you need to take the car to the original repair shop or a 4S store for inspection. 3. Wiring damage at the bumper: When you find that the reversing radar is not beeping, you can also check whether the wiring connection at the bumper is intact, then check whether the reversing light is on when the reverse gear is engaged. If it is not on, check whether the connection switch of the reversing light is broken. Then, you can check whether the computer displays any fault codes. If none of these is the problem, then check whether the reversing radar itself is malfunctioning.