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  1. #1
    Join Date
    Jan 2016
    Location
    Buenos Aires, Argentina
    Posts
    72

    Default Instrument cluster failure for everything except speedo and tachometer

    Hi everyone, so my instrument cluster (Gen1) was working great after changing the 5 usual capacitors.

    Suddenly during winter it started failing to start when starting the car, only speedo and tachometer work the rest (display, temp, fuel, mileage) is dead. Backlight does work for everything except check panel which is off.
    Then after a while it would come back online (it reverted to the fatherland initially with language in german, then it switched to the usual spanish).

    Lately, it has stopped starting up completely. Not only that, after having the car without battery for a few days, the OBC went into PPPP state. I googled and i says that this may happen when the OBC fails to communicate with the instrument cluster.

    I tried disassembling it, all caps look good. i dont see any indication of humidity, or any defective component.

    Any ideas what may be causing this? Regards
    Last edited by Coyote_ar; 03-01-2020 at 09:01 PM.

    E34 525i '88

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