Circuit Description

When the buckle switch of the driver's seat is ON with the ignition switch ON, the body ECU sends a signal to make the seat belt warning light for the driver's seat light up and to sound a buzzer.

When the buckle switch of the passenger seat is ON and the passenger seat belt occupant detecting sensor is ON with the ignition switch ON, the body ECU sends a signal to make the seat belt warning light for the passenger seat light up.