Why is there no sound from the reversing radar?

[EvangelineRose]

The reasons why the reversing radar has no sound: 1. The wiring connection is inappropriate or already damaged. If the rear of the car is close to an obvious obstacle and the reversing radar does not respond at all, there is a problem with the reversing radar wiring; 2. The quality of the radar itself is not good enough; 3. There is a blind spot on the far left and far right of the reversing radar. When this blind spot is about to touch an obstacle, the reversing radar cannot detect it. The reversing radar, also known as the reversing anti-collision radar or parking assist device, mainly consists of ultrasonic sensors, a controller, a display, and other components. Its working principle is that during reversing, the reversing radar uses ultrasonic waves. The probe installed on the rear bumper sends ultrasonic waves that reflect off obstacles, calculates the actual distance between the car body and the obstacle, and then alerts the driver, making parking or reversing safer.