DTC B1780 Front Occupant Classification Sensor LH Circuit Malfunction: Description

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

DTC B1780 is recorded when a malfunction is detected in the front occupant classification sensor LH circuit.

FRONT OCCUPANT CLASSIFICATION SENSOR LH CIRCUIT MALFUNCTION

DTC No.	DTC Detecting Condition	Trouble Area
B1780	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 LH circuit for 2 seconds. Front occupant classification sensor LH malfunction Occupant classification ECU malfunction	Front seat back assembly RH (Front occupant classification sensor LH) Occupant classification ECU Front seat wire RH