[s-cars] AIRBAG Light Fix

[Rob Pecsar]

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Many thanks to the List, Chi Wong in particular, and Steve Mills' article
and pics on UrS4.com. My '92 is finally free of the 2 minute airbag light.
Also applies to '93 and '94s, if you can't access your Airbag with VAG-COM
from under the hood.

Tools required:

Good maintenance records of your S4/S6
Thin blade screwdriver
4 mm Allen Wrench
VAG-COM
Flashlight

What to do:

   * If you have a '92, verify that the KF14 recall was done on your car. If
     so, you have an AIRBAG II system. The dealer can tell by your S/N if
     the recall was done. If not, then let the dealer upgrade your airbag
     and fix the light for free!
   * Pry the trim piece off that surrounds your A/C Central Control. BE
     CAREFUL to go slowly. See Steve Mills pics @
     http://www.urs4.com/technical/interior/hvac.html
   * Unscrew the two 4 mm Allen Head screws that hold on the trim piece
     spring clips. Again, Steve's HVAC article & pics really helps.
   * Lift out the central control unit and swing it out so it rest on the
     passenger seat.
   * A flashlight will help you see that you are looking down on the AIRBAG
     triggering unit (labeled as such). Note the connector on the left side
     of the triggering unit and note the grey foam that is just above the
     connector. Inside the foam are the two 2-pin connectors that hook up to
     your VAG-COM, identical to the ones under the left side of the hood.
   * Push back the foam and connect up the two connectors.
   * Follow the VAG-COM menu to view and clear your fault codes.
   * Reverse the order...you're done!

Why did my AIRBAG fault in the first place, after the car was washed?

Answer: The DS that owned the car before me fixed a blocked drain tube by
stuffing paper towels in the heater flap so water wouldn't leak into the
car. Well water still leaks in, just slower, which contacted the red Airbag
connector above the ECM and threw the fault code.

Hope this helps,

Rob Pecsar


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