2008 Toyota Yaris Owners Manual - Page 462

1-3. Adjustable components (seats, mirrors, steering wheel) n Release method The belt can be completely released when not required, such as when folding down the rear seat. To release the hooked end tab, insert the vehicle's key into the hole on the buckle. 1 Before driving Seat belt pretensioners (front seats) The pretensioner helps the seat belt to quickly restrain the occupant by retracting the seat belt when the vehicle is subjected to certain types of severe frontal collision. The pretensioner may not activate in the event of a minor frontal impact, a side impact or a rear impact. 43