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Hi Guys

 

New to the forum as an active member!!! This is my first post so excuse me for any mistakes. To the problem now. I have a Cayenne 2008 GTS with 380,000km !!!!!!!!!!!!! On saturday i washed the car and since then various problems started appearing. I noticed that the car wouldn't lock with the remote nether unlock so i thought to my self that it is the remote battery despite the fact that i had no warning on the cluster.

Next day morning i tried starting the car and it started fine but the "Check Tailights" warning came on. Got off the car to check the lights and they didn't work. I tried opening the boot to check the bulbs and i discovered that the rear lid wouldn't open either.Also as soon as the car starts the Alarm starts singing, not very loud though ( if my car was to be stollen i wouldn't hear the alarm, thats how low volume it was)

So besides the locking and unlocking problem, taillights  the rear lid problem appeared.

I thought that it might be a fuse so i checked all fuses. Left and right fusebox and the one in the engine bay. All the fuses were ok. I plugged in the Durametric Proffessional cable and i come up with the fault code "1330 Rear convenience system control module - No signal/communication, test conditions are not-completed, fault is not currently active and is not causing a DTC light"

I did a lot of online searching but couldn't find anything specific. My guess is that i need a new Vehicle Electrical System Control unit. Any ideas? Has anything similar happened to anyone? I am out of ideas and the Dealership here in Cyprus is no option. I used to work for them :) so i know whats going on!!!!!!!!!!

 

Any info would be greatly appeciated!!!!

 

P.S. Hope my post is ok. Dont want to be banned on my first post!!!!

 

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How old is your main battery?

Cayennes seem to have a number of strange electrical problems when the main battery is weak or failing.

If your battery is 4 years old or older I would start by replacing it.

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380,000 Kms ! It's certainly done its service.

Apart from the battery, I'd feel around for any and all dampness inside the vehicle. Relays ? It surely can't be a coincidence that the problems have started immediately after washing the vehicle.

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Hi Loren, Main system battery was replaced 3 years ago. Ordered a new one to replace it because as you said these cars have issues when battery is unstable or when the voltage drops below a certain point.

 

Wizard: Checked fuses, relays and everything else basically but no water entered the car :(

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