parking sensor
 

hi my front parking aid is not working done a scan and there is no fault codes and everything seems ok is there a way to switch them on or check

cheers trev

Do you get a long high pitched beep along with the flashing green light when you select reverse or press the button on the dash?

The controller will detect a break in the circuit of a faulty sensor and disable both front and rear sensors.

You could use VCDS to check the measuring blocks and see if the front sensors are actually working and picking up a signal, in which case it could be the sensors speaker that has failed.

hi when I select d or r I get one beep then nothing and no flashing green light.how do you check the measuring blocks I think mine says 255 on all of them.

cheers trev

done another check tonight no fault codes no flashing green light both front and back not working im getting one beep if I select D or R done a reset of the mmi should I do another mmi upgrade run or would this clear things on the display

cheers trev

I have never done it before but I would think you would need someone to walk around the car so you can see if the sensor values change

Trev

One of mine is faulty, and the easiest way I found to test it by myself was pretty simple. Call up the measuring block in VCDS. As you say, they all show 255. Next, just attach a piece of paper to the bumper so that it covers a sensor. Then check VCDS. If the sensor is working, it will show 0 and not 255. Then just repeat the process on all the sensors. Mine is a front centre fault, which means a bumper off job, which I'll get around to... eventually.

cheers guys done a bit searching and I got this code in 19 can gateway

1327 - Control Module for Parking Aid (J446)
004 - No Signal/Communication - Intermittent

cheers trev