[s-cars] auto check system demon removal

[Igor Kessel]

Michael Minnich wrote:
>
> Recently purchased a 1993 s4.  Damn flashing burnt bulb indicator and
> associated high frequency (read annoying as hell) beep comes on at
> random times and will not go away.  I replaced all bulbs, used contact
> enhancer, etc. trying to get rid of this problem, but no success.  Local
> dealer says "bring it in, we will look at it", which translated into
> Audi Factory Trained Service is "we will charge you at least $300.00 to
> tell you we do not know what the problem is".  Anyway, if anyone has
> experienced a similar problem or knows how to disconnect the idiot, er I
> mean the auto check system, please let me know.
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Michael,
today is your lucky day. I know _EXACTLY_ where your problem lies. It's
in the instrument cluster.
Pull it out, and take it apart. In the back there are two 18-pin
connectors (going by memory here), which interconnect the two PCBs. One
connector has the Autocheck feed on Pin 1 (once again going by memory
here), and its solder joint likes to develop a hairline crack. Which
leads to the intermittent buzzing as if a bulb were burnt out. Which is
not. Just touch it up with a soldering pencil. It's a 2 minute job.
This problem had been driving me nuts for several weeks, neccesitating a
complete retracing of ALL the related circuitrly with a multimetre and a
magnifying glass. Was a real bitch to find.

--
Igor Kessel
two turbo quattros