Toyota CH-R Service Manual: System Description

Toyota CH-R Service Manual / Seat Belt / Seat Belt Warning System(w/o Occupant Classification System) / System Description

SYSTEM DESCRIPTION

SEAT BELT WARNING SYSTEM DESCRIPTION

(a) Seat belt warning light operation for driver seat belt:

The seat belt warning light on the combination meter assembly blinks or turns off in accordance with the driver seat belt state and vehicle speed.

(b) Seat belt warning light operation for front passenger seat belt:

The 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 seat belt state and vehicle speed.

When the vehicle is driven at 20 km/h (12 mph) or more with the front passenger seat occupied and the driver or front passenger seat belt not fastened, the seat belt warning buzzer in the combination meter assembly will sound at an interval of 1.2 seconds for 30 seconds. After that, the seat belt warning buzzer in the combination meter assembly will sound at an interval of 0.4 seconds for 90 seconds.

FUNCTION OF MAIN COMPONENTS

Component	Function
Front seat inner belt assembly (driver seat)	Informs the main body ECU (multiplex network body ECU) of the driver seat belt condition (fastened or unfastened).
Front seat inner belt assembly (front passenger seat)	Informs the combination meter assembly of the front passenger seat belt condition (fastened or unfastened).
Separate type front seat cushion pad (occupant detection sensor)	Informs the combination meter assembly of the front passenger seat condition (occupied or unoccupied).
Combination meter assembly	The combination meter assembly blinks or turns off the front seat belt warning light. The combination meter assembly sounds the seat belt warning buzzer.
Main body ECU (multiplex network body ECU)	Sends the driver seat belt buckle switch signal to the combination meter assembly via CAN communication.
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.

Precaution

PRECAUTION IGNITION SWITCH EXPRESSIONS HINT: The type of ignition switch used on this model differs according to the specifications of the vehicle. The expressions listed in the table below are u ...

System Diagram

SYSTEM DIAGRAM ...

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