Tests AE: LFC 46/DTC B1877/B1885 - Driver Pretensioner CKT Resistance High or Low

Pinpoint Test AE1:

Pinpoint Test AE2:

Pinpoint Test AE3:

Pinpoint Test AE4-AE5:

Pinpoint Test AE: LFC 46/DTC B1877/B1885 - Driver Pretensioner Circuit Resistance High or Low

Normal Operation

The Restraints Control Module (RCM) monitors the resistance of the circuits to the driver belt pretensioner. When the RCM detects a resistance that is out of the expected range (high or low) it will set Lamp Fault Code (LFC) 46 and Diagnostic Trouble Code (DTC) B1885 or B1877.

Possible Causes

An out of range resistance on the driver belt pretensioner circuit can be caused by:
- out of range resistance on circuit 1079 (LG/RD).
- out of range resistance on circuit 1080 (LG/BK).
- out of range resistance on the driver belt pretensioner.
- an RCM internal concern.