DTC B1B54: Seat Belt Buckle Switch (RH) Circuit (Ground Side) Shorted; DTC B1B55: Seat Belt Buckle Switch (RH) Circuit (Power Supply Side) Shorted; DTC B1B56: Seat Belt Buckle Switch (RH) Circuit Open: Notes

Fig 1: Seat Belt Switch Circuit Diagram

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

CAUTION: If DTC B1B54, B1B55 or B1B56 are set in the SRS-ECU, always diagnose the CAN main bus lines.