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Home >> Ford >> 2001 >> Mustang Base, 2D Convertible, Automatic >> Repair and Diagnosis (Single Page) >> Restraints >> Air Bag, SRS >> Supplemental Inflatable Restraint System >> Diagnostic Tests >> Test I: Passenger Air Bag Circuit Short To Battery Or Ignition (DTC B1925) >> Possible Causes

Possible Causes

A passenger-side air bag ignitor circuit shorted to battery or ignition voltage could be caused by a short to battery or ignition voltage on Light Blue-Orange wire (circuit 607), a short to battery or ignition voltage on Pink-Black wire (circuit 616), a short to battery or ignition voltage in passenger-side air bag module or an internal RCM fault.

  1. Check for hard or intermittent DTC

    Ensure ignition is off. 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 DIAGNOSTIC TROUBLE CODES (DTCS)  under DIAGNOSTICS. Perform on-demand self-test. See ON-DEMAND SELF-TEST  under DIAGNOSTICS. If DTC B1925 was retrieved during on-demand self-test, fault is hard. Go to next step. If DTC B1925 was not retrieved, fault is intermittent. Go to step  5 .

  2. Check passenger-side air bag

    Turn ignition switch to OFF position. Disable air bag system. See DISABLING SYSTEM  under DISABLING & ACTIVATING AIR BAG SYSTEM. Turn ignition switch to RUN position. Perform on-demand self-test. If DTC B1925 is retrieved, go to next step. If DTC B1925 is not retrieved, replace passenger-side air bag module. See PASSENGER-SIDE AIR BAG MODULE  under REMOVAL & INSTALLATION. Go to step  6 .
    NOTE: Do not remove or separate shorting bars from RCM harness connector.

  3. Check passenger-side air bag circuit

    Turn ignition off and disconnect negative battery cable. Access RCM and disconnect harness connector. See RESTRAINTS CONTROL MODULE (RCM)  under REMOVAL & INSTALLATION. Turn ignition switch to RUN position. Measure resistance between RCM harness connector terminals No. 6 (Light Blue-Orange wire) and No. 2 (White-Orange wire). See Figure . If resistance is less than 10 megohms, go to next step. If resistance is more than 10 megohms, replace RCM. Go to step  6 .

  4. Check passenger-side air bag wiring

    Disconnect passenger-side air bag module connector. Inspect all crimps, terminals, fuses, wires and connectors feeding RCM harness connector terminals No. 6 (Light Blue-Orange wire) and No. 7 (Pink-Black wire). See WIRING DIAGRAMS  . Also, check for pinched wires and damaged connector terminals. If any damage is found, repair-replace as necessary and go to step  6 . If no damage is found, go to step  6 .

  5. Check for intermittent fault

    Refer to continuous DTCs recorded in step  1 . If DTC retrieved in step  1 was a intermittent fault, check for cause of intermittent short to battery or ignition voltage on Light Blue-Orange wire and Pink-Black wire. 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 a 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 appropriate test. See DIAGNOSTIC TROUBLE CODE (DTC) 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. Prove out system. See PROVE OUT SYSTEM  under DIAGNOSTICS. Clear all DTCs. See CLEARING DIAGNOSTIC TROUBLE CODES (DTCS)  under DIAGNOSTICS.
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