What Causes the Reversing Radar to Have No Sound Alert?
2 Answers
Reversing radar has no sound alert due to a malfunctioning buzzer. Here are the relevant details: 1. Principle of reversing radar: The reversing radar emits ultrasonic waves through ultrasonic sensors, which reflect back after hitting an obstacle and are received by the ultrasonic sensors. The controller then calculates the distance between the vehicle and the obstacle based on the time taken for the ultrasonic waves to be emitted and returned, finally alerting the driver with a rapid warning sound from the buzzer. 2. Main functions of reversing radar: Accurately measure the distance between the rear of the vehicle and the nearest obstacle; when reversing to the limit distance, it can emit a rapid warning sound to remind the driver to brake; it can repeatedly emit a voice warning to alert pedestrians.
I just encountered this issue and after careful troubleshooting, I found several common causes. The most frequent reason for reverse sensors not beeping is a problem with the probes: the radar sensors on the rear bumper might be covered in mud or blocked by ice, completely preventing obstacle detection; or one of the sensors might be damaged. Next, check the fuse box—if the reverse sensor fuse is blown, there will be no audible alert. Then, see if the radar control unit connector is loose—last time my car got rained on, it caused poor contact. Also, pay attention to system settings; sometimes accidentally touching the central control screen can mute the sensor volume. Lastly, the buzzer itself might be faulty. If none of these are the issue, consider a wiring short circuit or control module failure. Remember to check if the camera works normally when reversing; if there's no response at all, it's best to pull over immediately to avoid scratches.
