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03 Cayenne brake pad warning sensor wiring diagram NEEDED

Laurence Gibbs

Laurence Gibbs

PCGB Member
Member
I want to trace out the warning circuit but i don't have a diagram for it. Does anyone know if its the same as the touareg?(which i have a diagram for !) I am assuming it's not as touareg doesn't have PSM. Touareg warning circuit goes back to ABS module I assume it's very similar for Cayenne. Any help with where the plugs are located etc before I start pulling of plastic cover etc greatly accepted. I have a pads workshop warning and found a break in the loom on the front RHS , having repaired the break I still have the warning, so i need to go through and check till I find what's up. Also if anyone knows where i can find the warning on PST2 That would help. Not been able to find it in any menu so far
 
Replying to my own question. I went and bought a download of the wiring. The pad wear signal goes directly to the instrument cluster and can be found on Pin 7 plug B white and red wire . The other end of the chain is a ground connection near the left rear light. So the signal is pulled low until a wear sensor goes open circuit or the wiring loom breaks ! The sensors are linked in a series chain.
 
There is a software fault on these,when a fault is stored sometimes it stays in the instrument cluster memory and wont clear itself even using a diagnostic,the answer is to pull fuse 40 for the instrument panel in the fusebox on the front passenger side end of the dashboard,then replace and see if fault has cleared.
 
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