Cruise Control

[gerthdynn]

I have a 2004 Cayenne S. My cruise control isn't working. I noticed that there is a checklist of things to look for here are the things I've noticed. Can someone tell me most likely cause?

1) Cruise Control Light turns on in cluster when stalk pulled back.

2) Engine starts without pushing brake pedal.

3) Can move from park to other gears without pushing brake pedal.

4) Brake lights (including third) only on when brake pedal is pressed.

5) When in neutral and switching to offroad mode, brake pedal must be pressed.

6) When set button is pressed the vehicle seemingly doesn't engage cruise control as the speed steadily decreases when accelerator pedal is released.

Note: My parking brake is a bit lazy as the strut that pushes it out takes a little bit to come all the way out and sometimes takes some coaxing, but parking brake light goes out.

I really want this fixed before I go on my trip this Sunday, and the shop is busy and sounds like they might not have time to get to it. If I can diagnose the problem, maybe I can fix it myself quickly.

Edited December 15, 2010 by gerthdynn

[odix]

How old is your main vehicle battery Or batteries if applicable.

[RFM]

If the car is still equipped with a brake switch on top of the brake pedal, replace the switch. It will solve a big part of your problems. If there is no switch, a visit to the dealer's PIWIS is recommended.

[mudman2]

That brake switch was a problem with 04's for sure

[gerthdynn]

So that brake switch doesn't trigger the brake lights, but it does do all of the other things listed? That is crazy. Does anyone have a picture of the switch? I'm not exactly certain what I'm looking for.

Edit:

I may have found the part you are talking about on the PDF parts catalog. On page 702 of the PDF, I see a switch labelled 18.

It looks like it was originally: 955-613-110-32 for -04. I can't quite understand the terminology, but I think that it is showing that it was replaced by 955-613-110-31 and then 955-613-110-33. Can anyone confirm that?

Edited December 15, 2010 by gerthdynn

[gerthdynn]

Well thanks RFM and Mudman2. It took 3 days for the dealer to get the part, and then it was all of 10 minutes to replace the switch. Thanks so much for your help.

Just a note to everyone thinking of it, you need a T15 torx bit to remove the panel that hides this switch. You will see the switch above the brake pedal mounted on this metal bracket. There are two inner clips, that hold on the electrical connector. Press inwards on them and pull it out. Then push the switch in and turn it counter clockwise and it will come straight out. Replace it with the new one in reverse order. The part cost me 20 dollars and I have cruise control again. :)

[porcay04]

Well thanks RFM and Mudman2. It took 3 days for the dealer to get the part, and then it was all of 10 minutes to replace the switch. Thanks so much for your help.

Just a note to everyone thinking of it, you need a T15 torx bit to remove the panel that hides this switch. You will see the switch above the brake pedal mounted on this metal bracket. There are two inner clips, that hold on the electrical connector. Press inwards on them and pull it out. Then push the switch in and turn it counter clockwise and it will come straight out. Replace it with the new one in reverse order. The part cost me 20 dollars and I have cruise control again. :)

So, which part number did you ordered?

[gerthdynn]

Well thanks RFM and Mudman2. It took 3 days for the dealer to get the part, and then it was all of 10 minutes to replace the switch. Thanks so much for your help.

Just a note to everyone thinking of it, you need a T15 torx bit to remove the panel that hides this switch. You will see the switch above the brake pedal mounted on this metal bracket. There are two inner clips, that hold on the electrical connector. Press inwards on them and pull it out. Then push the switch in and turn it counter clockwise and it will come straight out. Replace it with the new one in reverse order. The part cost me 20 dollars and I have cruise control again. :)

So, which part number did you ordered?

I was on the phone with parts and the guy told me that while the -33 was supposedly a replacement for the -32 (according to the parts system) and that the -32 was a replacement for the original part, from what he could tell only the -32 had availability. So I ordered this: 955-613-110-32 and it worked just fine. Will it go out again? Who knows, but at least now I'm forewarned and I understand the symptoms. The absolute most important thing is that I had cruise control on my trip to see family, which made a huge difference. :)