System Outline

When the ignition SW is turned on, a signal is input to the combination meter and the center cluster integration panel (w/LEXUS navigation system) or the A/C control assembly (w/o LEXUS navigation system). To determine whether the driver has fastened the seat belt, a signal is input from the buckle SW LH to the combination meter. When the seat belt is not fastened, the seat belt warning light in the combination meter blinks, and emits a warning sound.

In addition, the front passenger is recognized by the occupant classification ECU (From Jan. 2006 production except Taiwan) or Seat belt warning occupant detection sensor (Before Jan. 2006 production, and from Jan. 2006 production for Taiwan) installed in the front passenger seat, and it is determined whether the seat belt is fastened. When not fastened, the signals from the buckle SW RH and the occupant classification sensor via the occupant classification ECU and center airbag sensor assembly (From Jan. 2006 production except Taiwan), or those from the seat belt warning occupant detection sensor and the buckle SW RH (Before Jan. 2006 production, and from Jan. 2006 production for Taiwan) are input to the center cluster integration panel (w/LEXUS navigation system) or the A/C control assembly (w/o LEXUS navigation system), and the passenger seat belt warning light blinks to warn the passenger.