DTC B1771: Passenger Side Buckle Switch Circuit Malfunction [12/2017 - 10/2020]: Description

The passenger side buckle switch circuit consists of the occupant detection ECU and front seat inner belt assembly RH (front passenger side buckle switch).

DTC B1771 is stored when a malfunction is detected in the front passenger side buckle switch circuit.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
B1771	Passenger Side Buckle Switch Circuit Malfunction	The occupant detection ECU detects a line short, short to ground or B+, or an open in the front passenger side buckle switch circuit. Front passenger side buckle switch malfunction Occupant detection ECU malfunction	Front seat wire RH Front seat inner belt assembly RH (Front passenger side buckle switch) Occupant detection ECU