Why doesn't the Leiling reverse radar sound?
3 Answers
1. Power cord of the main unit: If the reverse radar does not sound, first check whether the power cord of the main unit is properly connected and if there is current; then check if the radar main unit cord has become loose. If neither of these is the issue, the problem may lie with the radar itself. 2. Buzzer: If the problem is confirmed to be with the reverse radar, the first possibility to consider is a damaged buzzer. In this case, you need to purchase and install a new buzzer. Also, recall whether your car has undergone any recent modifications. If so, the reverse radar's wiring may have been damaged during the modification process, requiring you to take the car to the original repair shop or a 4S store for inspection. 3. Wiring connection at the bumper: When the reverse radar does not sound, you can also check whether the wiring connection at the bumper is intact. Then, check if the reverse light turns on when shifting into reverse gear. If it does not, check whether the connection switch of the reverse light is broken. You can also see if the computer displays any fault codes. If none of these issues are present, then check whether the reverse radar itself has a problem.
My reversing radar also had issues with not beeping before, mainly due to these possible reasons: the simplest one is that the sensors on the rear bumper are covered with mud—just park and wipe them clean; another possibility is that the reversing radar switch was accidentally turned off—some versions of the Levin have an independent switch near the steering wheel. Additionally, it’s quite common for the sensors themselves to become loose or damaged, especially after rainy days when the connectors are prone to water ingress and short circuits. A blown fuse is also a major reason—you can find the corresponding fuse for the reversing radar in the fuse box under the steering wheel and check if it’s blackened or melted. Wiring issues are more troublesome, requiring the removal of the rear bumper to inspect whether the harness connectors are loose or worn. Lastly, you should also check if the reversing lights are working properly, as the radar needs the reversing light signal to activate. If you can’t figure it out yourself, hurry to the 4S shop for a check—after all, reversing without a radar is really dangerous.
Over the years of repairing cars, I've seen many radar failure cases. Levin owners can troubleshoot step by step: First, visually inspect the four circular sensors at the rear for any obstructions—mud, water, or frost must be cleaned off. Then, engage reverse gear to test; placing your ear close to the sensors should reveal a faint electrical sound. If there's no sound at all, it indicates an issue with the wiring or power supply. Next, check the 10-amp fuse labeled 'back sonar' or with a reverse symbol in the fuse box, typically located below the driver's side. Also, verify if the reverse lights are functioning, as a burnt-out bulb can prevent the radar from activating. Removing the trunk liner allows access to the control module—check for loose connections by wiggling the plugs. If the fault remains elusive, visit a professional shop to read the error codes with a diagnostic tool, as a sensor might be internally damaged from vibration.
