DTC B1774: Pressure Sensor Circuit Malfunction; DTC B1775: Pressure Sensor Power Source Circuit Malfunction: Description

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

The occupant detection sensor sends the pressure signal to the occupant classification ECU.

DTC B1774 and B1775 are stored when a malfunction is detected in the pressure sensor circuit.

DTC Code	DTC Detection Condition	Trouble Area
B1774 B1775	When one of the following conditions is met: The occupant classification ECU receives a line short circuit signal, open circuit signal, short circuit to ground signal or short circuit to B+ signal in the occupant detection sensor circuit for 2 seconds. An occupant detection sensor malfunction. An occupant classification ECU malfunction.	Front seat wire RH No. 1 seat cushion assembly (occupant classification ECU and occupant detection sensor)

HINT:

When DTC B1650 is stored as a result of troubleshooting for the "Airbag System", check the DTCs stored in the occupant classification ECU. When DTC B1774 and B1775 are output, perform troubleshooting for those DTCs first.