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Thread: Air bag light 1990 Miata

  1. #1
    Brian Minto
    Guest Brian Minto's Avatar

    Default air bag light 1990 Miata

    Disconnect the battery and fully charge it. The number of flashes does
    reveal a coded fault message but it usually stems from low battery rather
    than actually faulty airbag.

    Brian Minto

    "Mac" <modmac69..........m> wrote in message
    news:3rl9j6p6mcdhvhf7dt8otc0gc3n09jb4vq@...........
    had the air bag light come on multiple times on the way home tonight.
    on off on off. also the wipers were acting sort of flaky at the same
    time. any ideas? 1990 Miata.

  2. #2
    Christopher Muto
    Guest Christopher Muto's Avatar

    Default air bag light 1990 Miata

    On 1/19/2011 7:35 PM, Mac wrote:
    > Battery is only a year old. another thing that happened, would not
    > turn over tonight and appears to be the igition switch. figure maybe
    > it was not making contact and the air bag ckt was reseting.
    > thanks.
    >
    >
    > On Tue, 18 Jan 2011 08:39:46 -0700, "Brian Minto"<mintob@shaw.ca>
    > wrote:
    >
    >> Disconnect the battery and fully charge it. The number of flashes does
    >> reveal a coded fault message but it usually stems from low battery rather
    >> than actually faulty airbag.
    >>
    >> Brian Minto
    >>
    >> "Mac"<modmac69..........m> wrote in message
    >> news:3rl9j6p6mcdhvhf7dt8otc0gc3n09jb4vq@...........
    >> had the air bag light come on multiple times on the way home tonight.
    >> on off on off. also the wipers were acting sort of flaky at the same
    >> time. any ideas? 1990 Miata.
    >>


    from reading many posting at miata.net, my understanding is that a
    blinking air bag light can be due to a faulty ignition switch. the
    solution suggested over there is to exercise the ignition switch with
    the key by moving it back and forth several times. that might be all it
    needs to clean out some dirt clogging a contact. but a bad ignition
    switch is also a pretty common issue for those that used heavy key
    chains in the miata. there are also issues with the capacitors in the
    air bag control module that means replacing the module (unless you have
    some well honed soldering skills and want to get inside the module
    itself), and there is some talk about failed fuses inside of the air bag
    module itself that is not user replaceable.

    but enough hearsay... this is what rod's manual says:

    "Turn the ignition swith to ON and observe the airbag warning light in
    the instrument panel.

    Airbag Warning Light Does Not Illuminate

    Check the METER and the ENGINE fuses in Fuse Block 1 (depending on the
    market they will be rated at 10 or 15 amps). Replace any burned fuses
    with new fuses of the correct rating. If the new fuses blow, check the
    appropiate wiring harness for damage, open or short circuits and oir
    connections.

    Airbag Warning Light Stays On

    This indicates a problem with the SAS unit or its wiring harness
    connector. Check the connection; If the fault remains, consult your
    Mazda dealer as quickly as possible.

    Airbag Warning Light Flashes

    A sequence of 3 short flashes repeating: code 3. This code indicates a
    problem with the battery (low voltage), faulty wiring between battery,
    ENGINE fuse and SAS unit or/and faulty wiring between battery, METER
    fuse and SAS unit. Check wiring and connectors. If the fault remains,
    consult your Mazda dealer as quickly as possible.

    A sequence of 6 short flashes repeating: code 6. This code indicates a
    fault in the clockspring or/and a fault in the wiring between the
    clockspring and the SAS unit. Check that the clockspring is correctly
    adjusted and that all relevant connectors are securely connected. If
    the fault remains, consult your Mazda dealer as quickly as possible.

    A sequence of 7 short flashes repeating: code 7. Indicates a fault in
    the wiring between the SAS unit and the passenger side air bag. Check
    that all relevant connectors are securely connected. If the fault
    remains, consult your Mazda dealer as quickly as possible.

    Warning! Airbag system fault are reported one at a time in order of
    priority, If you repair a fault, always check that the warning light
    then indicates that all is well with the system: there may be more than
    one problem. If the fault remains, consult your Mazda dealer as quickly
    as possible."

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