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Possible Causes

WARNING: This page is about a different car, the 2002 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.

AIR BAG warning light inoperative condition could be caused by damaged Black/Yellow wire (circuit No. 608), damaged or burned out bulb, instrument cluster malfunction or RCM internal fault.

  1. Check for hard or intermittent DTC

    Turn ignition switch to OFF position. Connect scan tool to Data Link Connector (DLC). See USING SCAN TOOL  under DIAGNOSTICS. Turn ignition switch to RUN position. Retrieve and record any continuous DTCs. See RETRIEVING FAULT CODES  under DIAGNOSTICS. Perform on-demand self-test. See ON-DEMAND SELF-TEST  under DIAGNOSTICS. If DTC B1869 was retrieved during on-demand self-test, fault is hard. Go to next step. If DTC B1869 was not retrieved, fault is intermittent. Go to step  5 .

  2. Check RCM

    Turn ignition switch to OFF position. Disable air bag system. See DISABLING SYSTEM  under DISABLING & ACTIVATING AIR BAG SYSTEM. Access RCM and disconnect harness connector C2041A. See RESTRAINTS CONTROL MODULE (RCM)  under REMOVAL & INSTALLATION. Measure resistance between ground and component side of RCM connector, terminal No. 20. See Fig 1 . If resistance is less than 100 ohms, replace RCM. Go to step  6 . If resistance is more than 100 ohms, go to next step.

  3. Check circuit for short to ground

    Turn ignition switch to OFF position. Reconnect RCM harness connector C2041A. Access and disconnect instrument cluster harness connector C220B. See INSTRUMENT CLUSTER  under REMOVAL & INSTALLATION. Measure resistance between ground and harness side of instrument cluster connector C220B, terminal No. 11 (Black/Yellow wire, circuit No. 608). See Figure . If resistance is less than 100 ohms, repair short to ground in Black/Yellow wire. See WIRING DIAGRAMS  . Go to step  6 . If resistance is more than 100 ohms, go to next step.

  4. Check circuit for open

    Disconnect RCM harness connector C2041A. Measure resistance between harness side of RCM connector, terminal No. 20 and harness side of instrument cluster connector C220B, terminal No. 11 (Black/Yellow wire). See Figure & Figure . If resistance is more than 10 ohms, repair open in Black/Yellow wire. Go to step  6 . If resistance is less than 10 ohms, go to next step.

  5. Check for intermittent fault

    Refer to continuous DTCs recorded in step  1 . If DTC retrieved in step  1 was an intermittent fault, check for cause of intermittent short to ground or open in Black/Yellow wire. See WIRING DIAGRAMS  . Attempt to recreate fault by flexing wire harness and cycling ignition switch frequently. Repair any intermittent problems found. Go to next step. If DTC retrieved in step  1 was not an intermittent fault, go to next step.

  6. Check for additional DTCs

    Refer to continuous DTCs recorded in step  1 . If any continuous DTCs were retrieved, go to diagnostic trouble code identification table for direction to appropriate test. DO NOT clear any DTCs until all DTCs have been resolved. See DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION  table. If no continuous DTCs were retrieved, reconnect air bag system. Activate air bag system. See ACTIVATING SYSTEM  under DISABLING & ACTIVATING AIR BAG SYSTEM. Clear all DTCs. See CLEARING FAULT CODES  under DIAGNOSTICS.
    Fig 1: Identifying Restraints Control Module (RCM) Pins
    G99E00097Courtesy of FORD MOTOR CO.
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