Rear parking sensors

[shmirsh]

Help please. Rear parking sensors appear to have packed up / stopped bleeping. How do I check if the sensor has failed or it's a fuse? Checked the fuse tray and can't find any fuse labelled "parking sensor". Is there a fuse, am I looking in the right place?

I have a late 2003 996 cabriolet (facelift).

Thanks
Shahid

 

[Keggers]

If the sensor packs it up, then the system beeps continuously in a lower tone than normal (when its in reverse). So it sounds like yours isn't the sensor. Greg

 

[dij999]

Mine packed up just because they were dirty! Hadn't worked for a week or so but fine after hosing off 3 weeks worth of winter country road grime. Dave Jones

 

[Richard_Hamilton]

Are the reversing lights working? It could be the reversing light switch that is the problem, as that is where the parking sensor module gets it's signal.

 

[shmirsh]

Nope, reversing lights not working. Do you have diagrams that show how this is wired?

 

[Richard_Hamilton]

Manual or Tiptronic? Either way, it is 99% likely to be the reversing light switch itself. On a manual it is a separate switch on the gearbox casing, and on a tip it is part of the switch unit on the bottom of the gear selector.

 

[shmirsh]

It's a 2003 tip. Do I need to take the tip gear lever off to get to the switch?

 

[Richard_Hamilton]

Yes, you have to take the whole selector mechanism off to get to the switch. I believe that you can buy the multi-function switch (which contains the reversing light switch) separately.