Toyota Yaris: Seat Belt Pretensioner and Load Limiting  Systems / Pretensioners

When a collision is detected, the pretensioners deploy simultaneously with the air bags.

The pretensioners deploy simultaneously with the air bags when a roll-over is also detected.

For deployment details, refer to the SRS Air Bag Deployment Criteria.

The front seat belt retractors remove slack quickly as the air bags are expanding. Any time the air bags and seat belt pretensioners have fired they must be replaced.

A system malfunction or operation conditions are indicated by a warning.

Refer to Warning/Indicator Lights.

Refer to Air Bag/Front Seat Belt Pretensioner System Warning Beep.

In addition, the pretensioner system for the front passenger, like the front and side passenger air bag, is designed to only deploy when the front passenger occupant classification sensor detects a passenger sitting on the front passenger’s seat.

For details, refer to the front passenger occupant classification sensor.