What is the reason why the Nissan Teana's reversing radar does not beep?
2 Answers
The reasons why the Nissan Teana's reversing radar does not beep: Problem with the radar itself: If you find that the reversing radar does not beep, first check whether the power cord of the host is properly connected and whether there is no current. Then check whether the radar host line is loose. If there is no problem, the issue may lie with the radar itself. Check the bumper wire connection: When you find that the reversing radar does not beep, you can first check whether the bumper wire connection is intact. Then check whether the reversing light is on when you shift into reverse gear. If it is not on, check whether the reversing light connection switch is disconnected. Check whether the computer displays a fault code: You can check whether the computer displays a fault code. If these items are fine, then check whether there is a problem with the reversing radar itself.
That day when I moved the car, I realized the radar wasn't making any sound, which made me panic and immediately check for issues. First, I felt the four circular sensor points on the rear bumper and noticed the one on the far right was dented—probably from backing into a low post without noticing. Later, I had a mechanic test it with a diagnostic tool, who said the main module was water-damaged and likely located behind the left trim panel in the trunk, where water from car washes can easily seep in. The wiring was also tested, and one wire under the fuse box was found chewed by rodents, exposing the insulation. These areas are all potential trouble spots, especially for older cars that need extra attention. After the repair, the mechanic reminded me that if the radar suddenly fails in the future, don't rush to step on the gas—it's best to get out and check if the bumper is blocked by something like a food delivery box covering the sensors.
