Toyota Yaris: Seat Belt Warning System / On-vehicle Inspection
ON-VEHICLE INSPECTION
PROCEDURE
1. INSPECT DRIVER SEAT BELT WARNING LIGHT
HINT:
The seat belt warning light on the combination meter assembly is used for both the driver seat and front passenger seat.
(a) Turn the ignition switch to ON.
(b) When the driver seat belt is not fastened, check that the seat belt warning light on the combination meter assembly illuminates.
(c) Lift the vehicle using a swing arm type lift.
Click here
(d) Start the engine.
(e) When the driver seat belt is not fastened, the parking brake is released and the vehicle is driven at approximately 1.75 km/h (1 mph) or more, check that the seat belt warning light on the combination meter blinks at an interval of 1.2 seconds.
(f) When the driver seat belt is not fastened and the vehicle is driven at approximately 20 km/h (12 mph) or more, check that the seat belt warning light on the combination meter assembly blinks at an interval of 1.2 seconds for 24 seconds.
After that, check that the seat belt warning light on the combination meter assembly blinks at an interval of 0.4 seconds for 100 seconds and then illuminates.
(g) When the driver seat belt is fastened, check that the seat belt warning light on the combination meter assembly turns off.
2. INSPECT FRONT PASSENGER SEAT BELT WARNING LIGHT
HINT:
The seat belt warning light on the combination meter assembly is used for both the driver seat and front passenger seat.
(a) Turn the ignition switch to ON.
(b) Place a weight of 20 kg (44.0 lb) on the front passenger seat.
NOTICE:
Place the weight on the seat cushion and do not allow it to come into contact with the seatback.
(c) Fasten the driver seat belt.
(d) When the front passenger seat belt is not fastened, check that the seat belt warning light on the combination meter assembly illuminates.
(e) Lift the vehicle using a swing arm type lift.
Click here
(f) Start the engine.
(g) When the front passenger seat belt is not fastened, the parking brake is released and the vehicle is driven at approximately 1.75 km/h (1 mph) or more, check that seat belt warning light on the combination meter blinks at an interval of 1.2 seconds.
(h) When the front passenger seat is occupied, the front passenger seat belt is not fastened and the vehicle is driven at approximately 20 km/h (12 mph) or more, check that the seat belt warning light on the combination meter assembly blinks at an interval of 1.2 seconds for 24 seconds.
After that, check that the seat belt warning light on the combination meter assembly blinks at an interval of 0.4 seconds for 100 seconds and then illuminates.
(i) When the front passenger seat belt is fastened, check that the seat belt warning light on the combination meter assembly turns off.
3. INSPECT REAR SEAT BELT WARNING LIGHT
| (a) Check the state of the rear seat belt warning light on the combination meter assembly: HINT: Perform the following inspection for each rear seat. (1) Turn the ignition switch to ON. (2) Open and close either front door. (3) When a rear seat belt is not fastened, check that the rear seat belt warning light on the telltale light assembly is illuminated. (4) After 66 seconds, check that the rear seat belt warning light on the telltale light assembly turns off. (5) When one of the rear seat belts is unfastened from being fastened, check that the rear seat belt warning light on the telltale light illuminates. |
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4. INSPECT FRONT SEAT BELT WARNING BUZZER
HINT:
The seat belt warning buzzer can be customized. Make sure that this function is ON.
Click here
(a) Place a weight of 20 kg (44.0 lb) on the front passenger seat.
NOTICE:
Place the weight on the seat cushion and allow it to come into contact with the seatback.
(b) Lift the vehicle using a swing arm type lift.
Click here
(c) Start the engine.
(d) When the driver or front passenger seat belt is not fastened and the vehicle is driven at approximately 20 km/h (12 mph) or more, check that the seat belt warning buzzer in the combination meter assembly sounds at an interval of 1.2 seconds for 24 seconds.
(e) After the seat belt warning buzzer has been sounding for 24 seconds at an interval of 1.2 seconds, check that the seat belt warning buzzer in the combination meter assembly sounds at an interval of 0.4 seconds for 100 seconds.
(f) Check that the seat belt warning buzzer in the combination meter assembly stops 124 seconds after it started sounding at an interval of 1.2 seconds.
(g) After the seat belt warning buzzer in the combination meter assembly stops, turn the ignition switch off and then start the engine. Drive the vehicle at approximately 20 km/h (12 mph) or more with either the driver or front passenger seat belt not fastened and check that the buzzer sounds in the same pattern again.
(h) After the seat belt warning buzzer in the combination meter assembly stops, fasten the driver or front passenger seat belt, drive the vehicle at approximately 20 km/h (12mph) or more, unfasten the driver or front passenger seat belt and check that the buzzer sounds in the same pattern again.
5. INSPECT REAR SEAT BELT WARNING BUZZER
HINT:
The seat belt warning buzzer can be customized. Make sure that this function is ON.
Click here
(a) Lift the vehicle using a swing arm type lift.
Click here
(b) Fasten the driver seat belt.
(c) Start the engine.
(d) Fasten and unfasten a rear seat belt, and then drive the vehicle at approximately 20 km/h (12 mph) or more and check that the seat belt warning buzzer in the combination meter assembly sounds once.
(e) After the seat belt warning buzzer sounds once, check that it sounds at an interval of 1.2 seconds for 6 seconds.
(f) After the seat belt warning buzzer has been sounding for 6 seconds at an interval of 1.2 seconds, check that the seat belt warning buzzer in the combination meter assembly sounds at an interval of 0.4 seconds for 60 seconds.
(g) Check that the seat belt warning buzzer in the combination meter assembly stops 66 seconds after it started sounding at an interval of 1.2 seconds.
(h) After the seat belt warning buzzer in the combination meter assembly stops, turn the ignition switch off, open and close either front door and then start the engine. Drive the vehicle at approximately 20 km/h (12 mph) or more with any of the rear seat belts is not fastened and check that the buzzer sounds in the same pattern again.
(i) After the seat belt warning buzzer in the combination meter assembly stops, turn the ignition switch off, open and close either front door and then start the engine. Drive the vehicle at approximately 20 km/h (12 mph) or more with any of the rear seat belts is not fastened and check that the buzzer sounds in the same pattern again.
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Front Seat Belt Pretensioners
The front seat belt pretensioners are designed to deploy in moderate or severe frontal, near frontal collisions.
In addition, the pretensioners operate when a side collision or a rollover accident is detected. The pretensioners operate differently depending on what types of air bags are equipped. For more details about the seat belt pretensioner operation, refer to the SRS Air Bag Deployment Criteria.
