DTC B1556: Driver's Seat Slide Sensor Malfunction (Occupant Classification-ECU): 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 B1556 is stored in the Occupant classification-ECU, always diagnose the CAN main bus line.