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.

DTC DETECTION CONDITION AND TROUBLE AREA REFERENCE CHART

DTC Code	DTC Detection Condition	Trouble Area
B1780	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 LH circuit for 2 seconds Front occupant classification sensor LH malfunction Occupant classification ECU malfunction	Front seat wire RH Front seat RH (Front occupant classification sensor LH) Occupant classification ECU