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Home >> Ford >> 2000 >> Contour SE, 2.5 L, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 268 (Supplemental Restraint System - Air Bag Restraint Systems) >> Diagnostic Tests >> Test B: Air Bag Warning Light Circuit Open Or Short To Ground (DTC B1869) >> Possible Causes

Possible Causes

WARNING: This page is about a different car, the 2004 Mercury Mountaineer and 2004 Ford Explorer. 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 wiring, terminals or connectors, faulty RCM, faulty AIR BAG warning light bulb or instrument cluster internal malfunction.

  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 ON position. Retrieve and record any continuous Diagnostic Trouble Codes (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 and AIR BAG warning light does not illuminate, go to next step. If DTC B1869 was retrieved during on-demand self-test and AIR BAG warning light does illuminate, go to step  4 . If DTC B1869 was not retrieved, fault is intermittent. Go to step  5 .

  2. Check AIR BAG warning light operation

    Turn ignition switch to OFF position. Disable air bag system. See DISABLING SYSTEM  under DISABLING & ACTIVATING AIR BAG SYSTEM. Access RCM and disconnect connector C310A. See RESTRAINTS CONTROL MODULE (RCM)  under REMOVAL & INSTALLATION. Connect negative battery cable. Turn ignition switch to ON position. Connect fused jumper between ground and harness side of RCM connector C310A, terminal No. 19 (Black/Yellow wire, circuit No. 608). See Figure . If AIR BAG warning light goes out, replace RCM. Go to step  6 . If AIR BAG warning light does not go out, go to next step.

  3. Check circuit No. 608 for open

    Turn ignition switch to OFF position. Access instrument cluster and disconnect connector C220A. See INSTRUMENT CLUSTER  under REMOVAL & INSTALLATION. Measure resistance between harness side of instrument cluster connector C220A, terminal No. 3 and harness side of RCM connector C310A, terminal No. 19 (Black/Yellow wire, circuit No. 608). See Figure & Figure . If resistance is less than 5 ohms, repair or replace instrument cluster. If resistance is more than 5 ohms, repair open in Black/Yellow wire. See WIRING DIAGRAMS  . Go to step  6 .

  4. Check AIR BAG warning light operation

    Turn ignition switch to OFF position. Disconnect RCM connector C310A. Connect negative battery cable. Turn ignition switch to ON position. If AIR BAG warning light comes on, replace RCM. Go to step  6 . If AIR BAG warning light does not come on, go to next step.

  5. Check for intermittent fault

    Disable air bag system. See DISABLING SYSTEM  under DISABLING & ACTIVATING AIR BAG SYSTEM. Perform on-demand self-test. If DTC B1869 was retrieved during on-demand self-test, go to step  2 . If DTC B1869 was not retrieved during on-demand self-test, check for cause of intermittent short to ground or open in Black/Yellow wire (circuit No. 608). 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.

  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. See DIAGNOSTIC TROUBLE CODE IDENTIFICATION  table. DO NOT clear any DTCs until all DTCs have been resolved. If no 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.
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