Seat Belt Systems: Description and Operation

SYSTEM OUTLINE

1. SEAT BELT WARNING SYSTEM
When the ignition SW is turned to the ON position, the signal is input to the body ECU and door ECU. At this time, to determine whether or not the driver fastens the seat belt, the signal from the buckle SW LH is input to TERMINAL DBKL of the body ECU No.2. If the driver does not fasten the seat belt, the seat belt warning light in the combination meter flashes and the alarm buzzer goes on, in response to the communication control of the body ECU and door ECU etc.
Additionally, the sensor (Seat belt warning occupant detection sensor) installed on the front passenger seat detects the passenger and determines whether or not the passenger fastens the seat belt.
If the passenger does not fasten the seat belt, the signals from the seat sensor and buckle SW RH are input to TERMINAL RBE+ of the center airbag sensor assembly and through communication control of the body ECU and door ECU etc. the passenger seat belt warning light in the clock is flashed.

2. KEY REMINDER SYSTEM
If the driver door is opened with the ignition SW set at the ACC or OFF position and the ignition key remained inserted into the key cylinder (The unlock warning SW is on), the signal from the unlock warning SW is input to TERMINAL KSW of the body ECU No.2 and the signal from the door courtesy SW front LH is input to TERMINAL CTY of driver door ECU. As a result, through communication control of the body ECU and door ECU etc. the buzzer in the combination meter goes on to warn the driver that the ignition key is still inserted.