DTC B1781 Front Occupant Classification Sensor RH Circuit Malfunction: Description

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

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

DTC TROUBLE DETECTION CHART

DTC No.	DTC Detection Condition	Trouble Area
B1781	When one of following conditions is met: Occupant classification ECU detects line short signal, open signal, short to ground signal or short to B+ signal in the front occupant classification sensor RH circuit for 2 seconds Front occupant classification sensor RH malfunction Occupant classification ECU malfunction	Front seat wire RH Front seat RH (Front occupant classification sensor RH) Occupant classification ECU