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Home >> Ford >> 2002 >> ZX2 Automatic >> Repair and Diagnosis (Single Page) >> Restraints >> Air Bag, SRS >> Supplemental Inflatable Restraint System >> Diagnostic Tests >> Test P: Air Bag Warning Light Inoperative (DTC B1869) >> Possible Causes

Possible Causes

AIR BAG warning light inoperative condition could be caused by damaged Pink/Green wire (circuit No. 952), damaged or burned out AIR BAG warning light bulb or an instrument cluster malfunction.

  1. Check for hard or intermittent DTC

    Ensure ignition is off. Connect New Generation Star (NGS) tester to Data Link Connector (DLC). See USING NGS TESTER  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 ECS module

    Turn ignition switch to OFF position. Disable air bag system. See DISABLING SYSTEM  under DISABLING & ACTIVATING AIR BAG SYSTEM. Access ECS module and disconnect harness connector. See ELECTRONIC CRASH SENSOR (ECS) MODULE  under REMOVAL & INSTALLATION. Measure resistance between chassis ground and component side of ECS module terminal No. 7. See Figure . If resistance is more than 100 ohms, go to next step. If resistance is less than 100 ohms, replace ECS module. Go to step  6 .

  3. Check circuit No. 952 for short to ground

    Disconnect White 10-pin instrument cluster connector. See INSTRUMENT CLUSTER  under REMOVAL & INSTALLATION. Measure resistance between ECS module connector terminals No. 7 (Pink/Green wire) and No. 21 (Black wire, circuit No. 57). If resistance is less than 100 ohms, repair short to ground on Pink/Green wire. See WIRING DIAGRAMS  . Go to step  6 . If resistance is more than 100 ohms, go to next step.

  4. Check circuit No. 952 for open

    Measure resistance of Pink/Green wire between ECS module harness connector terminal No. 7 and White 10-pin instrument cluster connector terminal No 9. See Figure & Fig 1 . If resistance is less that 10 ohms, repair instrument cluster as necessary and go to step  6 . If resistance is more than 10 ohms, repair open in Pink/Green wire. Go to step  6 .

  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 on Pink/Green wire. Attempt to recreate fault by driving vehicle, 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. See DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION  table. DO NOT clear any DTCs until all DTCs have been resolved. 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 White 10-pin Instrument Cluster Connector Terminals
G99F23957Courtesy of FORD MOTOR CO.
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