Nissan sonar diagnostic tips
So I'm going to give a brief description before I link the video. Early Nissan vehicles that use sonar for parking assist can be Troublesome to diagnose as I have found. First off, even though there is a sonar module listed on the scan tools, it does not communicate on the data bus. This can be a problem in and of itself because you will think that there is a communication issue when in fact it was never designed to communicate. it is it is basically a standalone unit that has its own Diagnostics built in. you will you will see in the video how to get it into diagnostic mode and read the faults. But the second problem with these vehicles is that the sonar buzzer is a very common failure. I don't I don't know if the engineers intentionally designed the system this way or not but, when the sonar buzzer fails the system will fail to go into diagnostic mode. so so now you have no way to diagnose what sensor may be at fault. In the video I go over how to install a bulb in place of the buzzer just to get it into diagnostic mode. This particular vehicle was at a body shop and had the rear bumper replaced. Afterwards, they notice the sonar not working and the Amber LED on the on-off switch was always lit. a quick check with the stethoscope revealed a potential problem with the left a quick check with the stethoscope revealed a potential problem with the left outer sensor. Once I got it into diagnostic mode and it flashed a 11 fault, that pointed to a problem with the same sensor that that pointed to a problem with the same sensor that I already suspected. in the end this vehicle needed a left outer sensor and a sonar buzzer.