Toyota Venza: System Description

Toyota Venza Service Manual / Seat Belt / Seat Belt Warning System / System Description

SYSTEM DESCRIPTION

1. SEAT BELT WARNING SYSTEM DESCRIPTION

If a seat belt is not fastened, this system flashes the seat belt warning light or sounds the seat belt warning buzzer as a reminder.

(a) Driver side seat belt warning light:

When the driver side seat belt is not fastened with the ignition switch ON, the driver side seat belt warning light on the combination meter assembly blinks to inform the driver. The center airbag sensor assembly detects the driver side seat belt status and sends signals to the combination meter assembly via CAN communication.

(b) Front passenger side seat belt warning light:

When the front passenger side seat belt is not fastened with the ignition switch ON and the front passenger seat occupied, check that the front passenger side seat belt warning light on the accessory meter assembly blinks. The accessory meter assembly displays the front passenger side seat belt status and whether the front passenger side seat is occupied.

When the vehicle is driven at approximately 20 km/h (13 mph) or more while the driver or front passenger side seat belt is not fastened, the seat belt warning buzzer in the combination meter assembly sounds at an interval of 1.2 seconds for 9.6 seconds. After that, the buzzer sounds at an interval of 0.4 seconds for 20 seconds.

2. FUNCTION OF MAIN COMPONENT

Component	Function
Front seat inner belt LH (driver side buckle switch)	Informs center airbag sensor of the driver side seat belt condition (fastened or unfastened).
Front seat inner belt RH (front passenger side buckle switch)	Informs center airbag sensor of the front passenger side seat belt condition (fastened or unfastened).
Occupant classification sensor	Informs center airbag sensor of the front passenger side seat condition (occupied or unoccupied).
Driver seat belt warning light	If driver side seat belt is unfastened and the ignition switch is ON, the meter ECU flashes the seat belt warning light of the combination meter assembly as a reminder.
Front passenger seat belt warning light	When front passenger side seat is occupied and the ignition switch is ON, if the front passenger side seat belt is unfastened, the meter ECU flashes the seat belt warning light on the accessory meter assembly as a reminder.
Seat belt warning buzzer	If driver or front passenger side seat belt is unfastened and the ignition switch is ON, the meter ECU sounds the buzzer as a reminder.

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System Diagram

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