DTC B1780: Front Occupant Classification Sensor LH Circuit Malfunction [12/2017 - 10/2020]: Description

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

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

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
B1780	Front Occupant Classification Sensor LH Circuit Malfunction	The occupant detection ECU detects a line short, short to ground or B+, or an open in the front occupant classification sensor LH circuit. Front occupant classification sensor LH malfunction Occupant detection ECU malfunction	Front seat wire RH Front seat adjuster assembly RH (Front occupant classification sensor LH)* Occupant detection ECU

*: The front occupant classification sensor LH is built into the front seat adjuster assembly RH.