Tests AH: LFC 47/DTC B1881/B1886 - Passenger Pretensioner CKT Resistance High or Low

Pinpoint Test AH1:

Pinpoint Test AH2:

Pinpoint Test AH3:

Pinpoint Test AH4-AH5:

Pinpoint Test AH: LFC 47/DTC B1881/B1886 - Passenger Pretensioner Circuit Resistance High or Low

Normal Operation

The Restraints Control Module (RCM) monitors the resistance of the circuit to the passenger 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) 47 and Diagnostic Trouble Code (DTC) B1881 or B1886.

Possible Causes

An out of range resistance on the passenger belt pretensioner assembly circuit can be caused by:
- out of range resistance on circuit 1081 (YE/RD).
- out of range resistance on circuit 1082 (YE/BK).
- out of range resistance on the passenger belt pretensioner.
- an RCM internal concern.