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Thread: Door lock problem

  1. #1
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    Door lock problem

    I have central locking not remote locking on my VW Polo 9N and the key in the drivers door will unlock/lock the drivers door and rear passenger doors but not the front passenger door.

    Put the key in the front passenger door and it will unlock/lock all 4 doors.

    What is the likely fault?

  2. #2
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    Check for broken wires going to the front passenger door, at the bellows by the hinges.

  3. #3
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    Quote Originally Posted by Pete1 View Post
    Check for broken wires going to the front passenger door, at the bellows by the hinges.
    Thanks for the reply. The bellows is loose at the bottom so able to see 3 cables (or groups of cables) protected by black fibre sheaths - all look intact.

  4. #4
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    You probably need to check from the other end where they all split off to their respective connectors. I'll just have a quick look at circuit diagrams and try to find the colour of the most likely wire to check thoroughly.

  5. #5
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    Check particularly the brown/yellow and black/yellow wires that go to pins 10 and 9 of the 21-way connector at the A-pillar.

    They operate the motor that does the unlocking when activated remotely.
    Last edited by Pete1; 10-03-19 at 15:04.
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  6. #6
    Administrator Keithuk's Avatar
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    First posts normally go in introductions else you could get a free fix and we never see you again!!!

    You need to get your motor scanned (preferably with VAG-COM\VCDS) for any error codes logged in the ecu and post them, that will save a lot of guessing and check systems out.
    2010 Golf GTD (170) CBBB, 5 Door, Shadow Blue (P6/D5Q), Transmission Code: KXZ, Flat Tyre Indicator, Basic Protection Pack + VCDS.


  7. #7
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    Quote Originally Posted by Pete1 View Post
    Check particularly the brown/yellow and black/yellow wires that go to pins 10 and 9 of the 21-way connector at the A-pillar.

    They operate the motor that does the unlocking when activated remotely.
    Thanks for the reply Pete
    I did finally get to take the door panel off and looked at all the cables. No broken cables that I can see. I think getting to the lock itself will be beyond me so maybe a job for my local garage.
    2002 Polo 9N 1.4 16v, Petrol

  8. #8
    Administrator Crasher's Avatar
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    A common 9N problem, I have done both on Mrs Crashers low milage 2006 in the last few months and at 194.02 each plus two hours installation they hurt, that could write off a four door that needed all four.
    2003 Skoda Octavia VRS Estate. APR 98RON remap, APR R1 diverter valve, Jetex exhaust, K&N panel filter, 7.5x18 Alutec Monstr wheels with 225/40 18 Uniroyal Rainsport 3 tyres.
    2006 Polo GTI 1.8T, APR 95RON remap
    1988 Golf 2 GTI 16 valve, 2.2 with Weber Alpha injection
    1983 Golf 1 GTI 8 valve, 2 litre with Eurospec racing 42/36 head
    1972 1302LS auto 1641cc conversion

    Vile Invention

    Dark was that day when Diesel conceived his grim engine that begot you, vile invention, more vicious, more criminal than the camera even, metallic monstrosity, bale and bane of our culture, chief woe of our Commonweal. How dare the Law prohibit hashish and heroin yet license your use, who inflate all weak inferior egos? Their addicts only do harm to their own lives: you poison the lungs of the innocent, your din dithers the peaceful, and on choked roads hundreds must daily die by chance-medley. Nimble technicians, surely you should hang your heads in shame. Your wit works mighty wonders, has landed men on the Moon, replaced brains by computers, and can smithy a "smart" bomb. It is a crying scandal that you cannot take the time or be bothered to build us, what sanity knows we need, an odorless and noiseless staid little electric brougham.

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