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Audi A4 2002 and later, S4 2004 and later, RS4 2007 and later (B6) Dynamic headlight dimmer control warning


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Last Post: Dec 21, 2013 5:37 PM Last Post By: 02a6zville
arthurc

Posts: 2
Registered: 12/09/03
Dynamic headlight dimmer control warning
Posted: Feb 20, 2003 9:18 AM
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Dynamic headlight dimmer control warning Arthur C arthurc arthurc@rogers.com
I recently had my car (2003 A4 Avant 3.0 6spd) in the dealership due to problems with the fuel delivery that left me shivering on the side of the road. At the time we were in a cold snap where the daily high was in the -20's (C). When I picked it up, they had washed it. Needless to say, that's not the wisest thing to do in that sort of cold. After prying the doors open and driving ~3km, the dynamic headlight dimmer control warning indicator came up on the console. I went back to the dealer and they said it was just frozen due to it being washed.

The cold snap has now lifted. We're getting daily highs above zero. I'm still getting this warning. The warning has to do with the leveling function of the Zenon headlights. I get enough people flashing me on a regular basis thinking that I have my high beams on. I'd like this functional ASAP.

My question is, does this warning have to be reset by the dealer? Seems the weather has been warm enough to deal with any ice problem. Is this a common problem? I've never experienced it and I've washed my car in sub-zero weather alot (though not in the -20's for sure). Are the mechanics for this function in the headlight itself or behind it? Perhaps a light bulb in the general proximity over night would sufficiently warm it to remove any remaining ice buildup.

fast928

Posts: 4,192
Registered: 03/01/02
Dynamic headlight dimmer control warning
Posted: Feb 20, 2003 9:03 PM   in response to: arthurc in response to: arthurc
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Dynamic headlight dimmer control warning Andrew Lundy fast928@prodigy.net fast928@prodigy.net
Hi Arthur,

In short, your dealer is full of crap.

Some cars do have troubles with the level sensor of the Xenon's going out of whack but it has nothing to do with the cold. The sensor almost always needs to be replaced.

The dealer can reset it and you can see if it happens again. More than likely it will repeat and you'll eventually have to have it replaced. Don't let the dealer feed you crap like that. It has nothing to do with washing the car or the cold!!

---
Andrew
90 CQ
99 A6q

-Previous-
90 80q
91 90
95 90q

arthurc

Posts: 2
Registered: 12/09/03
Re: Dynamic headlight dimmer control warning
Posted: Mar 22, 2003 5:39 PM   in response to: fast928 in response to: fast928
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Turns out the problem was a screwed up sensor behind the front wheel. I had a tow (car died on the side of the road due to some fuel delivery problem) that I believe was the culpit. The sensor was right where the driver attached the tow straps.

When replaced, the levelers still didn't function when the car was started. Turns out they were aimed up as high as they could go all the time. Something must have needed to be reset. They fixed that the next day. Overall, I'm not impressed with the lack of understanding on the Xenon front.

I'm truly annoyed at the dealership blaming everything on the Canadian winters. Design the bloody thing for -40C weather or get the **** out of Dodge. Two strikes against the car already. One more and I'll be off to something else. I don't need the hassle. Nice to drive but if it's on the back of a truck I don't get to choose the route.
fast928

Posts: 4,192
Registered: 03/01/02
Re: Dynamic headlight dimmer control warning
Posted: Mar 22, 2003 9:16 PM   in response to: arthurc in response to: arthurc
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Thanks for the update.

My level sensor broke this winter two. The actual pivot arm that moves is made of plastic and it's mounted in a dumb place.

What happens is that snow/slush/water get thrown on the sensor when you drive. Then it freezes up the plastic pivot arm. Then next time you drive the car, when it's frozen, the control arm moves but the sensor pivot arm can't because is frozen in place. Gravity will always win so the plastic arm breaks. It's really just a dumb design.

My car goes in on Tuesday to get it "fixed". After they replace it I imagine they have to do an adaptation on the sensor so it goes to the correct location. Your dealer didn't do it; I doubt mine will either.

Anyway, thanks for the update!!
boknows20

Posts: 50
Registered: 03/09/04
Re: Dynamic headlight dimmer control warning
Posted: Sep 3, 2006 3:45 PM   in response to: fast928 in response to: fast928
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Fast... where are those sensors located on a 2002 A6Q 2.7.
kevram

Posts: 5
Registered: 06/11/09
Re: Dynamic headlight dimmer control warning
Posted: Jun 17, 2009 3:46 PM   in response to: boknows20 in response to: boknows20
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hey there i have the same problem, how much was it to get dynamic headlight dimmer control warning fixed?
Britinindy

Posts: 3
Registered: 09/04/09
Re: Dynamic headlight dimmer control warning
Posted: Sep 5, 2009 12:31 AM   in response to: kevram in response to: kevram
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My Xenon alignment control unit failed twice under warranty. Nothing to do with a plastic arm, everything to do with a faulty batch of circuit boards. Also went through three fuel pumps until they installed a new design in 2004. North American winters are also bad for the car ... I commute 50 miles each way and ice packs up under the wheel arches ... I recently replaced all my plastic arch liners and underbody cover. Tomorrow I get to fix my right rear window mechanism. The joys of Audi ownership are boundless and never ending!
02a6zville

Posts: 1
Registered: 12/21/13
Re: Dynamic headlight dimmer control warning
Posted: Dec 21, 2013 5:37 PM   in response to: arthurc in response to: arthurc
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I just had the same error on my 2002 A6.
I found some information about this problem but I thought some pictures could help others who ran in to this issue.
I pulled the front driver's side tire and found that the connecting rod to the sensor had come loose from the suspension lower control arm. See the 1-Before pic.
It looked as simple as slipping it back over the pivot point on the control arm. See 2-control arm pivot pic
Unfortunately, there has been corrosion over the years and I had to remove the bracket that hold the pivot point to the control arm and clean it up a bit. The bracket is hinged and simple to remove. Just slip a flat blade screwdriver under the tab on top and lift up slightly and it should pop loose. See the tab inside the opening at the end of the connecting rod in pic number 2.
After removing the pivot bracket from the control arm, I scraped some of the corroded metal from between the plastic bushing and the metal shank. And trimmed the loose material so there was no interference slipping the rod back over it. See 3-control arm pivot pic
After cleaning up the pivot, I reattached the connecting rod to the pivot. I then had to put the suspension under a bit of a load to get the assembly back together. I placed a block of wood under the ball joint bolt and lower the jack slightly.
I then reattached the bracket to the control arm. See 4-Control arm pivot pic and 5-After pic. I then had to put the key in the ignition and turn to the On position and press the Check button (left one on the instrument cluster) to clear the error.
I think this may not stay together very long and I may have to buy a new bracket. That should be simple after doing this.

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