Cayenne warnings and electrical gremlins
Cayenne warnings and electrical gremlins
Author
Discussion

mcm66

Original Poster:

240 posts

211 months

Monday 4th June 2012
quotequote all
I'll start from the beginning so not to miss something I've done, so some of this info may be irrelevant. 05 Cayenne Turbo

Fitted towbar and electrics, and now warnings all over dash for PCM and Air suspension. So...

1. Lifted car to terrain height, took off rear bumper, rear lights and left car overnight.
2. must have left something on, battery dead. Put on charger in engine bay points and only reading 5v, would not charge as result.
3. Removed battery from under seat, tried again and reading 12.5 volts, took charge ok, so installed back
4. Started car, and now
a) air suspension fault (changed gaskets 6 months ago) - although car going up and down fine - it was left up overnight though, with a flat battery.
b) PSM fault. Car will not clear PSM fault as per owners manual, and PSM on/off light on dash not working.
c) Clock resets itself after I start the car back to whatever time it was last set ie, manually set clock to 10.05 am, it will then work while running or sitting until car is restarted later when it will jump back from current time to 10.05 am?
5. looked for auxiliary battery under BOSE sub in boot - i don't have one!
6. Bought a main new battery anyway, changed it over and still no difference.
Nearest Porsche 2 hours away!
Any one got any ideas?

Helicopter123

8,831 posts

186 months

Monday 4th June 2012
quotequote all
Sounds like a call to your OPC - have you got the warranty?

Almost certainly will be something annoyingly simple but impossible to diagnose.

mcm66

Original Poster:

240 posts

211 months

Tuesday 5th June 2012
quotequote all
no warranty i'm afraid, had the car for 5 years. Only wish we had an independent up here!

Helicopter123

8,831 posts

186 months

Tuesday 5th June 2012
quotequote all
Bit of a head scratcher then.

Guess your nearest OPC is Aberdeen? I know you are some way away but they are having their Open Service Clinic in the 16th June. I've always found them helpful so I wonder if it might be worthwhile having a word? If you were to hint you were thinking about a change I'm double certain they would be all over you.

Details on their website under news.

http://www.porsche.com/all/uk/?aberdeen


mcm66

Original Poster:

240 posts

211 months

Tuesday 5th June 2012
quotequote all
Cheers Mark, great info

belfry

1,053 posts

212 months

Tuesday 5th June 2012
quotequote all
Whenever I jack my Cayenne S to the highest setting on the air suspension, I end up with a PSM warning light. It always goes away once the car has been left locked and alarmed for a while. Good luck