Last post on Jul 18, 2013 at 3:20 PM
You are in the Volkswagen Passat
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Volkswagen Passat, Electrical, Sedan, Wagon
#395 of 411 Re: The Infamous CCM Problem, With a Twist [mnmatt]
Mar 28, 2012 (9:17 pm)
Here's an update on the situation.
About 2 days after I pulled out the CCM, looked at it, and put it back, I decided on a whim to try to start the car. To my complete surprise, it started right up!
What's more, it's been starting perfectly reliably ever since then. All the things that didn't work before have been working flawlessly. I still hold my breath when I shut off the engine, looking to see whether the interior lights come on, but they have every single time so far.
I guess just removing the CCM and putting it back must have cleaned an oxidized connector or something. This saved me about $350, which is what the dealer told me a new CCM would cost.
And the icing on the cake is that I have noticed significantly better gas milage since I R&R'd the CCM. I used to the the fuel warning light coming on after about 240 miles. On the current tank of gas, the light didn't come on until I had about 320 miles. Time will tell if this this improved milage sticks around or the milage diminishes, but for now I'm thrilled with my car.
#396 of 411 Re: Back Up Camera and DVD player [fjimenez]
Mar 28, 2012 (10:00 pm)
As an installer it would be unethical to recommend by-passing the no playback of video while driving. On your factory unit it may be tricky, anyway. I don't know, I can say the after market units respond well when applying said modification of video play back.
As for the back-up camera, the unit should have a "video in" RCA or manufacturer style plug for such a thing. It is triggered to send video signal to screen when the car is put into reverse ... so there's that connection as well. However, with factory video in your car, the wiring and connections/triggers should already be in place ... just add the camera, maybe.
#397 of 411 2002 VW Pasat
Jun 25, 2012 (7:10 am)
I have a Pasat, that is having issues. Occasionally it will not start, when it doesn't start, the power locks don't work, the power windows don't work, and when I take the key out, the radio stays on. There will be times when it works fine for a week, but then randomly won't start. I can always tell when it won't start, because when I open the door, the interior light doesn't turn on. Any suggestions on a solution for this problem?
#398 of 411 Re: 2002 VW Pasat [jcarey12]
Jun 25, 2012 (10:13 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 411 Re: 2002 VW Pasat [mnmatt]
Jun 26, 2012 (7:07 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 411 Re: 2002 VW Pasat [jcarey12]
Jun 26, 2012 (12:09 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 411 Re: 2002 VW Pasat [jcarey12]
Jun 26, 2012 (6:45 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 411 Re: 2002 vw passat [jerz3]
Nov 24, 2012 (2:17 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?