DTC B1781: Front Occupant Classification Sensor RH Circuit Malfunction [10/2013 - ]: Description

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The front occupant classification sensor RH circuit consists of the occupant detection 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 detection 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 Occupant detection ECU malfunction	Front seat wire RH Separate type front seat cushion spring assembly (Front occupant classification sensor RH) Occupant detection ECU

HINT:

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