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Home >> Ford >> 2000 >> Taurus LX, 3.0 2, AX4N >> Repair and Diagnosis >> External Pages >> Different car >> Section 34 (Air Bag Restraint Systems) >> Diagnostic Tests >> Test Aa: Right Seat Belt PRETENSIONER Circuit Resistance High Or Low (DTC B1881/B1886) >> Possible Causes

Possible Causes

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

An out of range resistance on right seat belt pretensioner circuit could be caused by high or low resistance on Red/Black wire (circuit No. 30S-JA34), high or low resistance on Black/Red wire (circuit No. 31S-JA34), high or low resistance in right seat belt pretensioner, or RCM internal fault.

  1. Check for hard or intermittent DTCs

    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 DIAGNOSTIC TROUBLE CODES (DTCS)  under DIAGNOSTICS. Clear continuous DTCs. See CLEARING FAULT CODES  under DIAGNOSTICS. Perform on-demand self-test. See ON-DEMAND SELF-TEST  under DIAGNOSTICS. If DTC B1881 or B1886 was retrieved during on-demand self-test, fault is hard. Go to next step. If DTC B1881 or B1886 was not retrieved, fault is intermittent. Go to step  4 .

  2. Check right seat belt pretensioner circuit

    Using scan tool, enter PID/DATA MONITOR and RECORD function. Select PID P-PRTNR. If resistance is 1.7-3.2 ohms, replace RCM. See RESTRAINTS CONTROL MODULE (RCM)  under REMOVAL & INSTALLATION. Go to step  5 . If resistance is not 1.7-3.2 ohms, go to next step.

  3. Check right seat belt pretensioner

    Turn ignition switch to OFF position. Disable air bag system. See DISABLING SYSTEM  under DISABLING & ACTIVATING AIR BAG SYSTEM. Ensure Pretensioner Simulator (105-R0012) is connected to left seat belt pretensioner harness connector. Using scan tool, enter PID/DATA MONITOR and RECORD function. Select PID P-PRTNR. If resistance is 1.7-3.2 ohms, replace right seat belt pretensioner. See SEAT BELT PRETENSIONERS  under REMOVAL & INSTALLATION. Go to step  5 . If resistance is not 1.7-3.2 ohms, repair high or low resistance in Red/Black or Black/Red wire (circuit No. 30S-JA34 or 31S-JA34). See WIRING DIAGRAMS  . Go to step  5 .

  4. Check for intermittent fault

    Turn ignition switch to OFF position. Disable air bag system. See DISABLING SYSTEM  under DISABLING & ACTIVATING AIR BAG SYSTEM. Perform on-demand self-test. If DTC B1881 or B1886 was retrieved during on-demand self-test, check for causes of intermittent fault at or near right seat belt pretensioner connector. Repair any intermittent faults found and go to next step. If no intermittent faults are found, go to step  2 . If DTC B1881 or B1886 was not retrieved during on-demand self-test, check for causes of intermittent high or low resistance in Red/Black or Black/Red 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.

  5. 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 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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