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Airbag light on - fault code 17931/P1523 - anyone had this fault and knows a fix?

Discussion in 'A3/S3 Forum (8L Chassis)' started by VAGMAN2, Dec 19, 2010.

  1. VAGMAN2
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    VAGMAN2 New Member

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    Air bag light just randomly blinked 4 times on my way home tonight (several minutes after starting the car), and the hazards came on. Got home and did a scan using vag-com, and came up with the following:

    17931/P1523/005411 - Crash Signal from Airbag Controller: Implausible Signal

    The fault won't clear. Strangely (to me!) I picked up the fault on the Engine ecu and NOT on the Airbag ecu.

    Has anyone had this fault code before and knows how to fix it??
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  2. sportstractor
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    sportstractor Chugger Regional Rep

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    Iv had a few airbag faults myself, but nothing along the lines of this...

    Obviously a faulty sensor or something but I would be very cautious to even using the car, If a airbag goes off thats big money and a possible broken nose lol. There was a chap on here whos airbag randomly went off...

    Have you checked the rosstech wiki?
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  3. gavin89
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    gavin89 Wana go Low gotta go Slow

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    Usually implausible signal faults is due to a very low/zero voltage on the sensor signal bus. You need to take take the sensor out in this case the airbag controller, IIRC its next to the gearstick, but please check with ETKA or ELSA just to make sure on your model of 8L. Either replace the controller, or take it apart and re-flow solder on the microprocessor and output pins.
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