Last post on Feb 08, 2013 at 10:35 AM
You are in the Volkswagen Passat
What is this discussion about?
Volkswagen Passat, Electrical, Sedan, Wagon
#398 of 409 Re: 2002 VW Pasat [jcarey12]
Jun 25, 2012 (11:13 pm)
It looks like you're suffering from the infamous Comfort Control Module issue. Many others, myself included, have had those same symptoms, which we're able to eventually trace back to the Comfort Control Module. Personally, when pulling up to my kid's school, or the gas station, or anywhere else where it would be possible to leave the car running if I so chose, I'd try to turn on the interior lights. If they worked, I'd go ahead and shut off the engine, confident it would start again. If the lights didn't come on, I'd leave the engine running, since I knew it wouldn't start up again.
My problem usually resolved itself after the car sat for awhile. The last time, however, it didn't start after sitting for several hours. I'd previously had some luck when I tinkered with the CCM, simply removing it and plugging it back in. After doing that, the problem didn't come back for several weeks. It eventually came back with a vengeance, though. So I ordered a new Comfort Control Module from the dealer ($379.59, tax included, just for the part), and left the car where it was. Four days later I went back to the car, and it still wouldn't start. I removed the old CCM, plugged in the new one, and still nothing. I about lost it. However, having read through this thread in its entirety in the past, I knew that sometimes it's not the CCM, but the wires that go to the CCM. So I started twisting, pulling and kneading wires, and next thing I knew, the car started right up. I drove it home, put the old CCM back in, put the new CCM back in the box, and I haven't had a single problem in the six weeks since then.
Somewhere farther back in this thread you'll find instructions or a link to another site that has instructions for replacing the CCM. It's located under the carpet in the footwell on the left side (driver's side in the USA) of the front seat. When water leaks into the interior, the CCM (a circuit board) can get wet, or the wiring can get wet. Water wasn't the culprit in my case, at least not that I could tell, but you can also find suggestions for unplugging drain holes in the engine compartment and the sunroof, which when plugged will allow water into your interior.
If you inspect all the wiring, jiggle it around, whatever, and the problem doesn't go away, or if you see evidence of water on the unit, I'd be happy to sell you my new CCM for less than you can get it for from the dealer. I used it for about 30 minutes before putting the old one back in, so I know it's good. Being an electrical part, the dealer wouldn't let me return it once the package was opened. If you're interested, the part number, which you should check on yours to be sure it's the same one, is 1C0-959-799-C-081. I'd be happy to send you pics of the unit and a copy of the invoice.
Good luck to you, and if you have any more questions, I'll hopefully be able to answer them.
#399 of 409 Re: 2002 VW Pasat [mnmatt]
Jun 26, 2012 (8:07 am)
Thanks for your response. I have not been able to start the car for two days now, so I definitely need to check the CCM. How difficult is it to access this part? If you could post the link on how to get to the CCM that would be a great help to me. If I end up needing a new CCM altogether, I will contact you. Thanks again for your help.
#400 of 409 Re: 2002 VW Pasat [jcarey12]
Jun 26, 2012 (1:09 pm)
I have a 96 Passat. My issue was the battery kept dying. I removed all the fusues and then reinstalled them. Haven't had the problem since. Maybe one was arching and grounding out somehow.
#401 of 409 Re: 2002 VW Pasat [jcarey12]
Jun 26, 2012 (7:45 pm)
I know it wasn't a battery problem for me, because all the dashboard lights came on, the headlights worked, and the radio worked, even after several days of the car just sitting unable to start. The power windows, interior light, and power locks did not work, and the ignition would not turn over if I turned the key.
Here's the site where I learned how to replace the CCM. They have a 1998 Passat, but the CCM and the wires are identical to my 1992 Passat wagon. When I moved the driver's seat all the way back, I could push the carpet back far enough to pull out the large plastic box that holds the CCM, and I can get to the thick bundle of wires alongside the door opening. I still haven't bothered to put it all back together, so I'm driving with a large plastic box on my floor, and the trim strip from the door opening loose.
I see in one of their photos that the part number on their CCM is slightly different than mine. Mine is 1C0-959-799-C-091, and theirs is 1J0-959-799-K-something (the picture cuts off). If the wiring isn't your problem, make a note of your particular CCM part number.
#404 of 409 Re: 2002 vw passat [jerz3]
Nov 24, 2012 (3:17 pm)
2003 Passat just changed the window reg clips and now the same problem not windows, remote locks, button locks than unlocks, no cabin lights, gas door, rear hatch lock .
Did you ever solve yours?
#405 of 409 Re: 2002 vw passat [swilbur]
Nov 24, 2012 (9:29 pm)
Sounds to me like the CCM. Read message #392 and #397 for more symptoms. Message #401 has a link to a site that has instructions for changing the CCM.
Beware, though. The CCM problem can also be wiring. In my case it was wiring, and just kneading the bundle of wires fixed it for me. Which is why I have a brand-new CCM I'm willing to sell. Contact me of you're interested, but thoroughly check the wires first.
#406 of 409 Re: Door Lock [neighbors81]
Dec 17, 2012 (7:19 pm)
I have the same problem with my Passat right now. What ended up being the problem?
#407 of 409 Re: Door Lock [timw8]
Dec 17, 2012 (7:52 pm)
Check the ground's in the wire loom leading to the ccm. When you open the bundles of wire, remove the black tape type wrap, and you will definitely see corrosion at the bad joints. I would also check the grounds up on the side wall to the left of your brake pedal.
Finally, check the operation of your door lock on the driver's side. Make sure the electrical portion is actually letting the car know the door is open. (Otherwise I have had it happen, on a Jetta most recently, where the door lock is the culprit, and the car thinks someone has climbed in without opening, and unlocking the door, then the anti-theft kicks in.)
Changed numerous Ccm's and respliced many wire looms and most times you can take care of it. Just be careful, and take your time. There are about 70+ wires, spliced down to 30 something, and then down to the ccm plug. So be thorough.
Good luck guys!