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Audi A3 8P Key fobs no longer unlocking car

Discussion in 'A3/S3/Sportback (8P Chassis)' started by poxxxy, Dec 9, 2012.

  1. poxxxy
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    poxxxy New Member

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    Hi all,

    My dads A3 8P (2004) 1.6 8v has developed a weird problem, both of his keys no longer operate the unlock system of the CCM. A read on VCDS doesn't show any obvious faults with the car and the lock function still works on both keys. The alarm sounds when the door is opened via the key as the immobiliser is active and only stops when the key is entered in the ignition barrel and the car starts.

    Anyone have any idea?
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  2. leach76
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    leach76 Member

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    Check fuses mate,not sure if same but on mk4 golfs a mini 10 amp blade fuse used to blow causing this on the dash side fuse box
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  3. poxxxy
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    poxxxy New Member

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    Haven't checked them yet, but when my golf did this the other day I already had this issue... however thats complete CCM death with no functioning at all... I haven't came across anyone with this same problem yet :(. Will check the fuses eitherway though. Is there a fuse list anywhere? :)
    #3
  4. _G_
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    _G_ Member

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    had this a few years and the battery was on its way out and near dead... worth checking that too incase its not holding charge.
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  5. Artimus
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    Artimus Short Back

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    had this a few days ago, it turns out that when I was familiarising myself with VCDS, I selected Transport Mode to see what it did - it disabled the Remote Central Locking, as well as a few other bits ...worth a check.
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  6. xtremedetailz
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    xtremedetailz Member

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    I have got this very exact problem.

    Did you ever fix it ?
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  7. poxxxy
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    poxxxy New Member

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    Hmmm artimus, I have a feeling that it could be as you said perhaps... its something i'll definately check tomorrow! Car is still with the problem :).
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  8. bulldog a3
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    bulldog a3 New Member

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    I had this recently happen - dealer had to order a new fob and reprogram the car and fobs again. Problem appears to be fixed.
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  9. poxxxy
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    poxxxy New Member

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    Definately not transportation mode, :(. I note that in the measuring blocks... the ccm module recognises a binary 1 when the lock key is pressed on both fobs, but it does not recognise when the unlock key is pressed and the status indicator in vcds measuring blocks remain as 0. Appreciate any help!

    If you use the unlock button on the boot, it disarms the alarm but the doors still remain locked unless turned with the barrel.
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  10. poxxxy
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    poxxxy New Member

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    As per this thread: Key FOBs won't unlock - TDIClub Forums, user gvan had the same problem... replace the 2032 battery in the remote. Something so simple, :). Just not enough voltage or whatever to send that signal!
    #10
  11. xtremedetailz
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    xtremedetailz Member

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    Mine has had 2 new battery's and still nothing.
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