SEAT BELT WARNING SYSTEM(w/ Occupant Classification System) SYSTEM DESCRIPTION

SEAT BELT WARNING SYSTEM DESCRIPTION

Tech Tips

The front seat belt warning light on the combination meter assembly is used for both the driver side seat and front passenger side seat.
1. Front seat belt warning light operation for driver side seat belt:
  
  The front seat belt warning light on the combination meter assembly blinks or turns off in accordance with the driver side seat belt state or vehicle speed.
2. Front seat belt warning light operation for front passenger side seat belt:
  
  The front seat belt warning light on the combination meter assembly blinks or turns off in accordance with whether the front passenger seat is occupied, the front passenger side seat belt state or vehicle speed.
3. Rear seat belt warning light operation for rear seat belt:
  
  When a rear door is opened and closed (the rear door courtesy light switch turns on and off) with the ignition switch ON, or when a rear door is opened and closed (the rear door courtesy light switch turns on and off) and then the ignition switch is turned to ON, the rear seat belt warning light in the telltale light assembly turns on to inform the driver of the condition of the rear seat belts.
4. Seat belt warning buzzer
  
  The seat belt warning buzzer in the combination meter assembly sounds at an interval of 1.2 second for 30 seconds, and then the buzzer sounds at an interval of 0.4 second for 90 seconds when the vehicle is driven at approximately 20 km/h (12.5 mph) or more and any of the following conditions are met: 1) the driver side seat belt is unfastened, 2) the front passenger side seat belt is unfastened with the front passenger seat occupied, or 3) a rear door has been opened and closed and a rear seat belt is unfastened.

FUNCTION OF MAIN COMPONENT

The following functions are available.
Components	Function
Front seat inner belt assembly LH	Informs airbag sensor assembly of driver side seat belt condition (fastened or unfastened).
Front seat inner belt assembly RH	Informs occupant detection ECU of front passenger side seat belt condition (fastened or unfastened).
Rear seat inner belt assembly LH, RH, Rear center lap type seat belt assembly RH	Informs telltale light assembly of condition of rear seat belts (fastened or unfastened)
Occupant detection ECU	Sends the front passenger side seat belt buckle switch signal and occupant detection signal to the airbag sensor assembly.
Front/rear occupant classification sensor LH	Informs the occupant detection ECU of the front passenger seat condition (occupied or unoccupied).
Airbag sensor assembly	Sends the driver side seat belt buckle switch signal to the main body ECU (multiplex network body ECU) via CAN communication. Sends the front passenger side seat belt buckle switch signal to the combination meter assembly via CAN communication.
Main body ECU (multiplex network body ECU)	Sends the driver side seat belt buckle switch signal to the combination meter assembly via CAN communication. Sends the parking brake switch signal to the combination meter assembly.
Brake actuator assembly (Skid control ECU)	Sends the vehicle speed signal to the combination meter assembly via CAN communication.
ECM	Sends the shift position signal to the combination meter assembly via CAN communication.
Front seat belt warning light	for Driver Side: If driver side seat belt is unfastened and ignition switch is ON, combination meter assembly flashes front seat belt warning light in combination meter assembly as reminder for Front Passenger Side: When front passenger seat is occupied and ignition switch is ON, if front passenger side seat belt is unfastened, combination meter assembly flashes front seat belt warning light of combination meter assembly as reminder Tech Tips The front seat belt warning light on the combination meter assembly is used for both the driver side seat and front passenger side seat.
Rear seat belt warning light	When rear door is opened and closed (rear door courtesy light switch turns on and off) with ignition switch to ON, or when rear door is opened and closed (rear door courtesy light switch turns on and off) and then ignition switch is turned to ON, telltale light assembly turns on rear seat belt warning light in telltale light assembly as reminder
Seat belt warning buzzer	If vehicle is driven at approximately 20 km/h (12.5 mph) or more with any of following conditions met, combination meter assembly sounds buzzer as reminder: 1) driver side seat belt is unfastened, 2) front passenger side seat belt is unfastened with front passenger side seat occupied, or 3) rear door has been opened and closed and rear seat belt is unfastened.