Operation CHARM: Car repair manuals for everyone.

Tests AA: LFC 47/DTC B1881/B1886 - Passenger Safety Belt Retractor Pretensioner Circuit Resistance High or Low

AA1:






AA2:






AA3:






AA4:






AA4 - AA5:






Normal Operation
The Restraints Control Module (RCM) monitors the resistance of the circuit to the passenger safety belt retractor 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 Test Code (DTC) B1881 or B1886.

Possible Causes
An out of range resistance on the passenger safety belt retractor pretensioner circuit can be caused by:
^ out of range resistance on circuit 30S-JA34 (RD/BK).
^ out of range resistance on circuit 31S-JA34 (BK/RD).
^ out of range resistance on the passenger safety belt retractor pretensioner.
^ RCM is faulted.