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 DETECTION CONDITION AND TROUBLE AREA REFERENCE CHART

DTC Code	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