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It is underneath the passenger seat. The attached PDF shows all module locations. Module Locations.pdf
Cayennes are notorious for grounding (earthing) issues. They also are notorious for the sunroof drains becoming blocked and causing leaks under the carpet where there are wiring harnesses. Good luck!
Check your battery first. Bad batteries cause all kinds of issues in Cayennes, especially the early years. I have an '03 TT and just replaced a battery that was less than 3 years old. The car was throwing the PSM failure code plus several other faults. Replaced battery, cleared all faults and just fine now. Ground issues also cause problems.
Thanks for the post cfiiman & Loren! I'm getting ready to do this to my '03 TT, so I may go ahead and order this hose and replace it. By the way, the "7L.." number is most likely a VW part#. Lot's of shared parts between the Cayennes and Touaregs and Audi SUVs
That's a sunroof leak. Your passenger side A-pillar tube is blocked and the water backs up and runs down inside the A-pillar. The easiest way to clear the blockage is to blow the line with an air compressor and check them every few months. Best to also remove the passenger seat bracket so you can get every thing dried out.
I found a cut wire and another that was almost cut in the wiring harness going to the circuit board.
I removed the plug then made a setup with silicone tubing that attaches to an air gun and blow out all four corners every few months
Amazon has these for $133/each Kumho Ecsta STX KL12 All-Season Tire - 275/45R20 106Z
It looks like mine may have been corrosion on the pins of the control unit connector. Still working fine as of today.
PROBLEM SOLVED...Hopefully. I got ready to delve into this earlier this morning and since I'm a firm believer in the KISS method, I disconnected the Tiptronic control unit and reconnected. Now, the manual-automatic is working as it should and the fault is gone. I'll go back and do a thorough cleaning of the pins in the connector, but I am hopeful that this was a simple fix.
2003 Cayenne Turbo
I believe mine was definitely the tire circumference mismatch. Doesn't have to be very much of a difference. I rotated them once they were worn pretty evenly and haven't had the problem since...knock wood
My manual shift works intermittently and after driving for 20-30 minutes P-R-N-D will all light up. Lights go out after car is turned off and restarted. Tiptronic on steering wheel works fine and will shift into manual when selector is in manual, but intermittently switches back to automatic. Sometimes, manual works fine with no problem. I replaced the trim cover even though it wasn't broken and it didn't change anything. Durametric gives me "1045 Selector lever switch - Implausible signal, test conditions are not-completed, fault is currently active and causing a DTC light" Is this code for the selector switch on the side of the transmission or the microswitch at the shift lever? Any other suggestions?
Thanks for the info. They're all the same size, 275/40R20 and all have pretty new tread, but I had to replace the front pair after a cut and tires matching the rears were discontinued.
My AC blower bearings need a little lube and I've dropped the blower out, but don't know how to get it out of the case. I've seen some older posts that talk about it, but never say how to get it out. I definitely don't want to break it!