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Thread: Airbag Control Module

  1. #1
    Join Date
    Jan 2003
    Location
    Wichita, KS
    Posts
    244
    My Cars
    1999 328i

    Airbag Control Module

    The airbag light came on, and my Indy mechanic (whom I trust) traced it first to the front pax airbag, but it checked ok. Now he says it is the control module under the center console. I wonder if the module is really bad, or if maybe the connectors have gotten dirty. Anybody with some experience here?

    Thanks.
    1999 328i 5spd Stock
    220K!

  2. #2
    Join Date
    Dec 2004
    Location
    Huntsville, AL
    Posts
    25,923
    My Cars
    87 325is
    If the SRS fault is for the passenger air bag firing circuit and the air bag has normal resistance (~2 ohms), a fault in the wiring or SRS module would be the likely causes. Before replacing the SRS module it would be advisable to ohm out the wiring from the SRS module connector to the air bag.
    The car makes it possible, but the driver makes it happen.
    Jim Levie, Huntsville, AL

  3. #3
    Join Date
    Jan 2003
    Location
    Wichita, KS
    Posts
    244
    My Cars
    1999 328i
    Can this be done without disconnecting the module?
    1999 328i 5spd Stock
    220K!

  4. #4
    Join Date
    Dec 2004
    Location
    Huntsville, AL
    Posts
    25,923
    My Cars
    87 325is
    No. To run the wiring check both ends of that circuit have to be disconnected.

    And to check te resistance of the airbag without risking accidental firing a meter with a "diode safe" resistance function is needed. most modern digital multimeters will have that capability.
    The car makes it possible, but the driver makes it happen.
    Jim Levie, Huntsville, AL

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