Tests AB: LFC 46/DTC B1885/B1877 - Driver Pretensioner Circuit Resistance High or Low

AB1 - AB2:

AB3 - AB5:

Normal Operation
The Restraints Control Module (RCM) monitors the resistance of the circuit 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 Test Code (DTC) B1885 or B1877.

Possible Causes
An out of range resistance on the driver belt pretensioner circuit can be caused by:
^ damage to circuit 30S-JA33 (RD/BU).
^ darnage to circuit 31S-JA33 (BK/BU).
^ damage to the driver belt pretensioner.
^ an RCM internal concern.