DTC B1771: Passenger Side Buckle Switch Circuit Malfunction [10/2018 - ]: Description

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

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 in the front passenger side buckle switch circuit. The occupant detection ECU detects a short to ground in the front passenger side buckle switch circuit. The occupant detection ECU detects a short to B+ in the front passenger side buckle switch circuit. The occupant detection ECU detects an open in the front passenger side buckle switch circuit. Front seat inner belt assembly RH malfunction Occupant detection ECU malfunction	Front seat wire RH Front seat inner belt assembly RH Occupant detection ECU

DTC DETECTION CONDITIONS:

		Vehicle Condition
		Pattern 1	Pattern 2	Pattern 3	Pattern 4	Pattern 5	Pattern 6
Diagnosis Condition	Ignition switch ON	◦	◦	◦	◦	◦	◦
Malfunction Status	The occupant detection ECU detects a line short in the front passenger side buckle switch circuit	◦	-	-	-	-	-
	The occupant detection ECU detects a short to ground in the front passenger side buckle switch circuit	-	◦	-	-	-	-
	The occupant detection ECU detects a short to B+ in the front passenger side buckle switch circuit	-	-	◦	-	-	-
	The occupant detection ECU detects an open in the front passenger side buckle switch circuit	-	-	-	◦	-	-
	Front seat inner belt assembly RH malfunction	-	-	-	-	◦	-
	Occupant detection ECU malfunction	-	-	-	-	-	◦
Detection Time		-	-	-	-	-	-
Number of Trips		1 trip	1 trip	1 trip	1 trip	1 trip	1 trip

HINT:

DTC will be output when conditions for either of the patterns in the table above are met.