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Thread: No diagnostics comms with Lexia..and Sensodrive blues

  1. #1

    Default No diagnostics comms with Lexia..and Sensodrive blues

    Hi all, my C2 VTR has stopped talking to my Lexia - all the ECUs report no dialogue. The Lexia is ok, it works fine on my C3 and 306; used to work on the C2.

    Two days ago the C2 went into neutral, snowflake and beep and now refuses to start or initialise the gearbox. Fortunately it happened just coasting into a park for a Funeral after a two hour drive.
    All fuses (glove compartment, engine bay and even all the Maxi) are intact. Oddly, after the service (one hour) it did start and engage first & reverse fine; so went back in for afternoon tea; but now won't do anything!

    Any ideas appreciated. This has been a great performing car - sensodrive has been mostly ok except the occasional hard to select 1st error. Went back up today with Lexia and tools, but no joy so currently looking at freighting it home on a truck....
    Thanks

  2. #2

    Default

    No comms can happen when there is an interruption in the CAN line. Prime suspect is the ABS ecu or its relay behind the battery. Quick way to check without pulling plugs etc is to watch what happens to the ABS light when you switch on the ignition. If the light does not come on at all you found your problem. If it does light then prob look elsewhere

  3. #3

    Default

    The other reason for no comms is a flat battery. Charge it at a shop and try lexia without attempting to start

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