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Home >> Ford >> 2000 >> Contour SE, 2.5 L, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 794 (Supplemental Restraint System) >> Diagnosis And Testing >> Pinpoint Tests - Air Bag and Safety Belt Pretensioner Supplemental Restraint System (SRS) >> Pinpoint Test F: LFC 33/DTC B1879 - Driver Pretensioner Circuit Short to Ground >> Normal Operation

Normal Operation

WARNING: This page is about a different car, the 2005 Ford RV Cutaway, 2005 Ford Econoline, 2005 Ford E450 Super Duty, and 2005 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: There is no restraint system diagnostic tool for the safety belt buckle pretensioners. If the ignition switch is set to RUN or START with the safety belt buckle pretensioner electrical connector(s) disconnected, the DTC for an open circuit will be activated.

The safety belt pretensioners are activated by the RCM to remove excessive slack from the safety belt webbing when an impact exceeding preprogrammed limits is detected. Refer to AIR BAG AND SAFETY BELT PRETENSIONER SUPPLEMENTAL RESTRAINT SYSTEM (SRS) .

The restraints control module (RCM) monitors the circuits to the driver safety belt pretensioner for faults. If the RCM detects a short to ground on either of the driver safety belt pretensioner circuits, it will store diagnostic trouble code (DTC) B1878 in memory and flash lamp fault code (LFC) 33 (or higher priority code if one exists) on the air bag indicator.

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