LEMON Manuals: Even more car manuals for everyone
Home >> Ford >> 2000 >> Contour SE, 2.5 L, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 267 (Supplemental Inflatable Restraint System - Except F150) >> Diagnostic Tests >> Test E: Left PRETENSIONER Circuit Resistance High Or Low (DTC B1877 Or B1885) >> Possible Causes

Possible Causes

WARNING: This page is about a different car, the 2004 Ford Pickup, 2004 Ford F550 Super Duty, 2004 Ford F450 Super Duty, and 2004 Ford Excursion. However, it is still accessible from the selected car via links, so may be relevant.

A left seat belt pretensioner out of range resistance fault can be caused by out of range resistance in Light Green/Red wire (circuit No. 1079), out of range resistance in Light Green/Black wire (circuit No. 1080), out of range resistance in left seat belt pretensioner or faulty RCM.

  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 B1877 or B1885 was retrieved during on-demand self-test, fault is hard. Go to next step. If DTC B1877 or B1885 was not retrieved, fault is intermittent. Go to step  4.

  2. Check left pretensioner circuit

    Using scan tool, select PID/Data Monitor and Record. Select PID D-PRTNR. If resistance is not 1.7-3.2 ohms, go to next step. If resistance is 1.7-3.2 ohms, replace RCM. See RESTRAINTS CONTROL MODULE (RCM)  under REMOVAL & INSTALLATION. Go to step  5.

  3. Check left pretensioner

    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. With PID D-PRTNR selected on scan tool, read pretensioner resistance. If resistance is not 1.7-3.2 ohms, repair Light Green/Red wire and/or Light Green/Black wire. See WIRING DIAGRAMS . Go to step  5. If resistance is 1.7-3.2 ohms, replace left seat belt pretensioner. See SEAT BELT PRETENSIONERS  under REMOVAL & INSTALLATION.

  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 B1877 or B1885 was retrieved during on-demand self-test, check for cause of intermittent faults at or near left seat belt pretensioner harness connector. Repair any intermittent faults found. If intermittent faults are found and corrected, go to next step. If intermittent faults are not found, go to step  2. If DTC B1877 or B1885 was not retrieved during on-demand self-test, fault is intermittent. Check for cause of intermittent faults in Light Green/Red and/or Light Green/Black wire(s). 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 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.
scientia non olet · About LEMON Manuals