I just bought a 2010 2.0 Blue Motion Passat B7 and when I got it the parking sensors did not work.

I used VCDS and it said that the front right sensor has a fault.

I removed the bumper and tested the sensors. The front right one just needed a new sensor which I bought and fitted, but the right side facing sensor will work when moved over to the other side of the car, but not where it is. I tested the voltage on the plug to this sensor and there's only just over 2 volts going to it. I thought all the sensors in the bumper shared a common 12v. Any advise or links to wiring diagrams would be gratefully received.


Thanks

Craig