DTC B1538: Seat Belt Switch (Passenger's side) Circuit (Ground Side) Shorted: Notes
WARNING: This page is about a different car, the 2014 Mitsubishi Outlander. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
If DTC B1538 are stored in the SRS-ECU, always diagnose the CAN main bus lines.