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 107 (Air Bag Restraint Systems) >> Diagnostic Tests >> Test E: Left Front Belt & Buckle PRETENSIONER Circuit Short To Ground (DTC B1876) >> Possible Causes

Possible Causes

WARNING: This page is about a different car, the 2002 Ford RV Cutaway, 2002 Ford Econoline, 2002 Ford E550 Super Duty, 2002 Ford E450 Super Duty, and 2002 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.

Left front belt and buckle assembly pretensioner circuit shorted to ground can be caused by a short to ground on circuits 1079 (Light Green/Red wire) or 1080 (Light Green/Black wire) or short to ground in left front belt and buckle assembly pretensioner.

  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 B1876 was retrieved during on-demand self-test, fault is hard. Go to next step. If DTC B1876 was not retrieved, fault is intermittent. Go to step  3.
    NOTE: Do not separate or remove shorting bars from ECS module connector.

  2. Check left front belt & buckle pretensioner circuit

    Turn ignition switch to OFF position. Disable air bag system. See DISABLING SYSTEM  under DISABLING & ACTIVATING AIR BAG SYSTEM. Access and disconnect left front belt and buckle assembly pretensioner harness connector. See BELT & BUCKLE ASSEMBLY PRETENSIONER  under REMOVAL & INSTALLATION. Access and disconnect ECS module harness connector. See ELECTRONIC CRASH SENSOR (ECS) MODULE  under REMOVAL & INSTALLATION. Measure resistance between harness side of ECS module connector terminals No. 18 (Black/Light Blue wire, circuit No. 875) and No. 24 (Light Green/Red wire). See Figure. Measure resistance between harness side of ECS module connector terminals No. 18 (Black/Light Blue wire) and No. 25 (Light Green/Black wire). If resistance is less than 10 k/ohms in either circuit, inspect all crimps, terminals, fuses, wires and connectors in circuit No. 1079 (Light Green/Red wire) and circuit No. 1080 (Light Green/Black wire). See WIRING DIAGRAMS . Check for pinched wires and damaged connector terminals. Repair any problems as necessary. Go to step  4. If resistance is more than 10 k/ohms in both circuits, replace left front belt and buckle assembly pretensioner. Go to step  4.

  3. Check for intermittent fault

    Refer to continuous DTCs recorded in step  1. If DTC retrieved in step  1 was an intermittent fault, check for causes of intermittent short to ground in circuits No. 1079 (Light Green/Red wire) and No. 1080 (Light Green/Black wire). See WIRING DIAGRAMS . Attempt to recreate fault by flexing wire harness and cycling ignition key frequently. Repair any intermittent problems. Go to next step. If no intermittent problems are found, replace ECS module. Go to next step.

  4. 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