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Driver Door Contact Switch

Discussion in 'A6/S6/Allroad forum (C5 Chassis)' started by v12bug, Jan 28, 2009.

  1. v12bug
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    v12bug Audi A6 Avant SE V6

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    hey all
    first time, so please be gentle. :blush:

    got an issue with the above, determined by my VAG-COM :

    ================================
    Address 35: Centr. Locks
    Control Module Part Number: 4B0 962 258 H
    Component and/or Version: Central Lock/Alarm D33
    Software Coding: 05870
    Work Shop Code: WSC 02325
    6 Faults Found:
    01371 - Alarm triggered by Door Contact Switch; Driver's Side
    35-00 - -
    01374 - Alarm triggered by Terminal 15
    35-00 - -
    01370 - Alarm triggered by Interior Monitoring
    35-00 - -
    01369 - Alarm triggered by Hood Switch
    35-00 - -
    01557 - Contact Switch in Locking Cyl; Driver Side; Open (F241)
    29-10 - Short to Ground - Intermittent
    01559 - Drivers Door
    60-00 - Won't Safe

    =========================

    first, have checked the wiring loom inside the rubber boot between body and door and that seems all fine, no breakages.

    so, started removing the door card / panel, to locate this Contact Switch, which I believe is clipped onto the latch mechanism. But there's a flexible rod that extends from the door handle rearward toward the latch assembly - this is clipped and pegged in place.

    Can this be easily unattached, and if so, from which end is best?

    The electrical contacts looked like they can be easily disconnected.

    So, where exactly is this microswitch, and roughly what does it look like?

    My feeling is either this Contact Switch has become dirty / requires cleaning, or it is stuck. It happened around the time it snowed in our area, and was really really cold..

    I don't want to fork out ~£100 from the stealers for this part, if I don't really need to.

    I have heard this is a very common issue on C5 A6's, so any help / advice / photo's on the above would be much appreciated.

    TIA
    #1
  2. DGSdale
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    DGSdale Member

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    With those fault codes it sounds like your problem could be more than just the door contact (micro)switch. Check out the fault codes using this link: http://wiki.ross-tech.com/index.php/Category:Fault_Codes
    Are your interior (roof), puddle,footwell & red door open lights working & does the door open graphic show on your DIS? If the microswitch is stuck in the 'door closed' position which is most likely if the switch is the problem, then these won't work either.
    To remove the door card completely, disconnect all electrical plugs & unclip the flexible rod from the interior door handle. With the door card out of the way you will be able to get at the latch mechanism which you will need to remove to get to the micoswitch. This was my post on this subject last December:
    As I'm a fairly slow typist, it would take me too long to explain how to do it, but that offer still stands - PM me & we'll go from there.

    Dave
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  3. v12bug
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    v12bug Audi A6 Avant SE V6

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    thanks very much Dave, for your response.

    The interior roof, footwell, puddle lights all work as they should. Ie, they all go out when the drivers door is closed. The DIS does NOT display the drivers door as open, so that is ok also.

    However, the interior roof light starts pulsing / turning on & off, like a disco light!, whilst driving. Also whilst this is happening, I can hear the drivers door mechanism going on and off repeatedly.

    So, I still feel as though this could be the contact switch, as displayed by the VAG-COM. Would you agree, taking the above into account, or could it be something else?
    #3
  4. DGSdale
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    DGSdale Member

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    My interior light did that too, while I was driving. Sounds like the switch might be making/breaking contact. Rightly or wrongly I'd say the switch should be your first port of call because theres a potential no-cost fix there. Might be a good idea to make sure your stealer has got a complete latch mechanism in stock & start the job early enough to get it before they shut if you do need it - if you have alternative transport to get there of course!

    Dave
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  5. v12bug
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    v12bug Audi A6 Avant SE V6

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    Well, as it goes I contacted my local stealers and none of them have this part in stock, and I would have to pay up front (~£100) in order to get the item in. So, I will try and have a look over the w/e at some point, and I'll update on my findings..

    Dave, I'll send you a PM in the meantime.:icon_thumright:
    #5

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