Test P: DTC B1877/B1885 - Seat Belt Driver Pretensioner Circuit Open Fault/ Seat Belt Driver Pretensioner Circuit Low

PINPOINT TEST P: DTC B1877/B1885 - SEAT BELT DRIVER PRETENSIONER CIRCUIT OPEN FAULT/ SEAT BELT DRIVER PRETENSIONER CIRCUIT LOW RESISTANCE ON SQUIB FAULT

P1-P3:

P3-P4:

P5-P7:

P8:

Normal Operation
The restraints control module (RCM) checks all of the safety belt pretensioners for faults. If the RCM detects a low resistance or open on the driver safety belt pretensioner circuits, it will store diagnostic trouble code (DTC) B1877 or B1885 in memory and illuminate the air bag indicator.

Fault Conditions
The RCM monitors for the following fault conditions:
- low resistance.
- circuit open.

Possible Causes
A driver safety belt pretensioner circuit open/driver safety belt pretensioner circuit low resistance fault can be caused by:
- damaged wiring, terminals or connectors.
- a faulty pretensioner.
- a faulted RCM.