Test Z: LFC 46/DTC B1885/B1877 - Driver Safety Belt Retractor Pretensioner Circuit Resistance High or Low

Z1:

Z2:

Z3:

Z4:

Z4 - Z5:

Normal Operation
The Restraints Control Module (RCM) monitors the resistance of the circuit to the driver 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) 46 and Diagnostic Test Code (DTC) B1885 or B1877.

Possible Causes
An out of range resistance on the driver safety belt retractor pretensioner circuit can be caused by:
^ out of range resistance on circuit 30S-JA33 (RD/BU).
^ out of range resistance on circuit 31S-JA33 (BK/BU).
^ out of range resistance on the driver safety belt retractor pretensioner.
^ RCM is faulted.