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Thread: Can't diagnose anything, it won't connect to the interfaces

  1. #1
    Verified VCDS User
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    Can't diagnose anything, it won't connect to the interfaces

    Hi,
    Since I went to VW to have them to reprogram my keys, I am not able to use VCDS anbnymore. Autoscan detect nothing and selecting interfsces ends up in error.

    I tried regular thing like, disconnect, reconnect, reboot cpmputer, update computer, reonnect...

    When I test usb connection it says it's OK. But I do not get any diag.
    -->2005 Volkswagen Touareg
    V8 4.2, Air Suspension,
    Lockable Center Differential + Rear Locking Differential
    19" Wheels, Factory Hitch and about 50 electronic issues

  2. #2
    Benevolent Dictator Uwe's Avatar
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    Plug it in, and tell us exactly what you get when you do [Options] -> [Test].

    -Uwe-
    The engineering problems are likely insurmountable. It would be like proposing to land a rocket booster section on a barge floating in the middle of the ocean.

  3. #3
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    -->2005 Volkswagen Touareg
    V8 4.2, Air Suspension,
    Lockable Center Differential + Rear Locking Differential
    19" Wheels, Factory Hitch and about 50 electronic issues

  4. #4
    Benevolent Dictator Uwe's Avatar
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    Looks mostly OK. Not sure if that car has VIgn on Pin 1 like newer ones do.

    Is the ignition on?

    -Uwe-
    The engineering problems are likely insurmountable. It would be like proposing to land a rocket booster section on a barge floating in the middle of the ocean.

  5. #5
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    Quote Originally Posted by Uwe View Post
    Looks mostly OK. Not sure if that car has VIgn on Pin 1 like newer ones do.

    Is the ignition on?
    Yes. In fact, I tried on, off and start. It uses to work... So that's weird.
    -->2005 Volkswagen Touareg
    V8 4.2, Air Suspension,
    Lockable Center Differential + Rear Locking Differential
    19" Wheels, Factory Hitch and about 50 electronic issues

  6. #6
    Verified VCDS User PetrolDave's Avatar
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    Quote Originally Posted by TkNorris View Post
    Yes. In fact, I tried on, off and start. It uses to work... So that's weird.
    Blown fuse so there is no Vign on the OBD connector?

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  8. #7
    FoRT jyoung8607's Avatar
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    Quote Originally Posted by PetrolDave View Post
    Blown fuse so there is no Vign on the OBD connector?
    If he's talking about the 2005 Touareg in his signature, there's an excellent possibility it doesn't supply VIgn from the factory. I don't have one here to test. However, I can tell you Phaetons of that era don't supply VIgn, and there's a great deal of design and parts cross-pollination between the Phaeton and Touareg of that era. The instrument cluster with diagnostic gateway (very relevant here!), the KESSY, the CCM, and a few other ancillary systems are basically identical.

    The OP's test results seem otherwise legitimate. I'd like to see the interface tried on another car, to break the problem domain in half: is the problem with the laptop/interface, or with the car?
    Silence gives consent.

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  10. #8
    Benevolent Dictator Uwe's Avatar
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    In addition a missing VIgn wound't cause a failure to connect.

    On cars that have it, it's a common sign that the user hasn't turned his ignition on, but in this case, I think that's been ruled out.

    -Uwe-
    The engineering problems are likely insurmountable. It would be like proposing to land a rocket booster section on a barge floating in the middle of the ocean.

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