DTC B1781: Front Occupant Classification Sensor RH Circuit Malfunction: Description

The front occupant classification sensor RH circuit consists of the occupant classification ECU and front occupant classification sensor RH.

DTC B1781 is stored when a malfunction is detected in the front occupant classification sensor RH circuit.

DTC No.	DTC Detection Condition	Trouble Area
B1781	The occupant classification ECU receives a line short circuit signal, an open circuit signal, a short circuit to ground signal or a short circuit to B+ signal in the front occupant classification sensor RH circuit. Front occupant classification sensor RH malfunction	Front seat wire RH Front seat cushion spring assembly (Front occupant classification sensor RH)

HINT:

When DTC B1650/32 is detected as a result of troubleshooting for the airbag system, check the DTCs stored in the occupant classification ECU. When DTC B1781 is output, perform troubleshooting for the DTC.