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Test Procedure

WARNING: This page is about a different car, the 1997 Ford Mustang. However, it is still accessible from the selected car via links, so may be relevant.

  1. Check For Ignition Voltage

    Deactivate system. See DISABLING & ACTIVATING AIR BAG SYSTEM  . Disconnect air bag diagnostic monitor. Turn ignition switch to RUN position. Using voltmeter connected to known good ground, connect second lead to C276-6, circuit 298 (Pink/Orange wire). If voltage measured is B+, go to next step. If voltage is not as specified, service circuit 298 (Pink/Orange wire) for open. Go to step 6).

  2. Check Circuit 57 (Black) For Open

    Using an ohmmeter connected to known good ground, connect second lead to terminal C276-18, circuit 57 (Black wire) and measure resistance to ground. If resistance is less than 3 ohms, go to next step. If resistance is not as specified, service circuit 57 (Black wire) for open. Go to step 6).

  3. Check For Battery Voltage

    Using an ohmmeter connected to known good ground, connect second lead to terminal C276-14, circuit 937 (Red/White wire) of air bag diagnostic monitor connector. If voltage measure is B+, go to step 6). If voltage is not as specified, go to next step.

  4. Check Battery Fuses

    Deactivate system. See DISABLING & ACTIVATING AIR BAG SYSTEM  . Check fuse No. 4 (10A) in fuse junction panel. If fuse is open, go to next step. If fuse is not open, service circuit 937 (Red/White wire) for open. Go to next step 6).
    WARNING: Certain fault conditions (DTC B1913 or B1914) may cause air bag diagnostic monitor to intentionally open fuse No. 4 (10A) to disarm SRS. DO NOT substitute another fuse value for 10A fuse. Any other fuse value may cause future disarming failure and danger to occupants of vehicle. Once air bag diagnostic monitor has disarmed SRS, it will not attempt to do so again until appropriate fault code (DTC B1913 or B1914) has been cleared. Do not reactivate system until all fault codes have been serviced and repaired.

  5. Check For Short In Harness

    Replace open fuse. If fuse does not open again, go to next step. If fuse opens again, service circuit 937 (Red/White wire) for short to ground. Go to next step.

  6. Check Module Communication

    Reconnect system components. Turn ignition switch to RUN position. If air bag diagnostic monitor communicates, reactivate system. See DISABLING & ACTIVATING AIR BAG SYSTEM  . Check AIR BAG warning light for proper system function. See SYSTEM OPERATION CHECK  . If air bag diagnostic monitor does not communicate, go to TEST E  - DATA LINK DIAGNOSTIC TEST FAILURE/AIR BAG DIAGNOSTIC MONITOR COMMUNICATION FAULT.
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