Hi All
I have an issue with the parking sensors in that none appear to be working, I have felt and listened to the front and back and get no noise or vibration from them. When the car is put in reverse I get a constant tone for short time then it goes off. I have had the PDC unit out, dry no unusual signs on the circuit board, fuse is good.
I have even tried the ignition on and moving close to all sensors but no joy, I am suspecting the PCD module may have failed unless anyone has any other checks I can do

Thanks in advance