2006 Jetta - Ignition Switch Replacement

Discussion in 'Mk5 VW Jetta, Sportwagen, and Audi A3 TDI forum' started by suparag, Apr 1, 2011.

  1. suparag

    suparag New Member

    Joined:
    Aug 28, 2010
    Messages:
    4
    Hi folks,

    My Jetta started with the strange issue yesterday. I inserted the key, after the first click (for the radio) and even before it reaches second click (for the Glow plug relay) and the car immediately started.

    This might be a big issue when the car is cold, it does NOT give time for GP to heat up. This happened when the car is warm after I drove 45 miles from work, then at a stop for a errand. It has continued to do this today.

    I have posted the errors from VCDS, looks like I have to replace the ignition switch. Can anyone tell me how to do it? I looked in the DIY section and I did not see one. In the TDIClub forum, there is one for Mk4 cars, but not for Mk5. Thanks in advance for your input.

    I just scanned with VCDS, and got errors from Central Electronics and Steering Wheel areas. Thanks in advance for your input.


    Address 09: Cent. Elect. Labels: 3C0-937-049-23-H.lbl
    Part No SW: 3C0 937 049 E HW: 3C0 937 049 E
    Component: Bordnetz-SG H37 1002
    Revision: 00H37000 Serial number: 00000000170177
    Coding: 14018E234004180000140000001400000028770B5C
    Shop #: WSC 24339 444 52551
    VCID: 2B7BCFA8F383

    Part No: 1K1 955 119 C
    Component: Wischer VW350 012 0402
    Coding: 00065493
    Shop #: WSC 24339

    1 Fault Found:
    01049 - Supply Voltage Term 50
    012 - Electrical Fault in Circuit - Intermittent
    Freeze Frame:
    Fault Status: 00101100
    Fault Priority: 1
    Fault Frequency: 12
    Reset counter: 166
    Mileage: 270691 km
    Time Indication: 0



    Freeze Frame:
    OFF
    Voltage: 12.00 V
    OFF
    ON
    ON
    OFF
    OFF

    Address 16: Steering wheel Labels: 1K0-953-549-MY8.lbl
    Part No SW: 1K0 953 549 AJ HW: 1K0 953 549 AJ
    Component: J0527 034 0070
    Coding: 0012021
    Shop #: WSC 00066 000 00000
    VCID: 7AD53AEC4C59

    Part No: XXXXXXXXXXX
    Component: E0221 007 0050

    3 Faults Found:
    00885 - Ignition Switch (D) Terminal 50
    012 - Electrical Fault in Circuit
    00884 - Ignition Switch (D) Terminal X
    012 - Electrical Fault in Circuit
    00576 - Terminal 15
    012 - Electrical Fault in Circuit - Intermittent
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  2. chittychittybangbang

    chittychittybangbang Administrator

    Joined:
    May 23, 2007
    Messages:
    21,924
    Car:
    2006 Jetta TDI
    Location:
    CT
    I can make a DIY for ignition switch removal if you post a reply that you still need it. I have a steering column and whatnot here.

    Basically, look in the FAQ for how to remove the steering wheel or swap the MFSW. Then remove the clockspring and whatnot for access. Once you're in there it's obvious how they are removed, then you can look underneath and see the ignition cylinder. Turn the key to ON and insert a pin into the little hole next to the key slot. That releases the cylinder.

    Terminal 50 is definitely the ignition switch wire but check the starter, maybe you have some wiring problem down there. I don't know how it would start just by turning it to ON though. You mean the starter runs when turning it ON but not START? What happens if you turn to START? Is the starter constantly running?
  3. suparag

    suparag New Member

    Joined:
    Aug 28, 2010
    Messages:
    4
    Please do post a DIY.

    Yes, the car actually starts even before it reaches the start position, actually just before the key even gets to the second click, where the glow plugs come on. It makes me wonder if the starter is running continuously. I can get the switch from the local stealership for $32 + tax. They want $165 to install it.:eek

    So I am not sure whether I should drive the car like this.
  4. chittychittybangbang

    chittychittybangbang Administrator

    Joined:
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    Messages:
    21,924
    Car:
    2006 Jetta TDI
    Location:
    CT
    Last edited by a moderator: Apr 2, 2011
  5. suparag

    suparag New Member

    Joined:
    Aug 28, 2010
    Messages:
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    I thought this error meant, I am replacing only the electrical portion of the ignition. The video shows replacement of the actual mechanical ignition switch.
  6. chittychittybangbang

    chittychittybangbang Administrator

    Joined:
    May 23, 2007
    Messages:
    21,924
    Car:
    2006 Jetta TDI
    Location:
    CT
    It's all in the same writeup and video to stay organized. Yes, if your ignition switch is in fact bad, you only have to remove the white plug thing on the end. The video explains that that part is what turns the car on, off, start.
  7. Bambur

    Bambur New Member

    Joined:
    Mar 29, 2010
    Messages:
    24
    Awesome DIY! Thanks a lot!

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