Test F: LFC 33/DTC B1879 - Seatbelt Driver Pretensioner Circuit Short to Ground

PINPOINT TEST F: LFC 33/DTC B1879 - SEATBELT DRIVER PRETENSIONER CIRCUIT SHORT TO GROUND

F1-F3:

F3-F5:

F6:

Normal Operation
The safety belt pretensioners are activated by the restraints control module (RCM) to remove excessive slack from the safety belt webbing when an impact exceeding preprogrammed limits is detected.

The 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 warning indicator.

Fault Conditions
The RCM monitors for the following fault conditions:
- Circuit short to ground

Possible Causes
A safety belt pretensioner fault can be caused by:
- faulted wiring, terminals or connectors.
- a faulted pretensioner.
- a faulted RCM.