Toyota 2008 FJ Cruiser Owner's Manual page 77

1-3. Adjustable components (seats, mirrors, steering wheel)
Adjusting the height of the belt (front seats)
n
Seat belt pretensioners (front seats)
52
Up
Move the height adjuster up as
needed until you hear a click.
Down
Push the lock release button
and slide the height adjuster
down.
The pretensioner helps the seat
belt to quickly restrain the occu-
pant by retracting the seat belt
when the vehicle is subjected to
certain types of severe frontal
collision.
The pretensioner may not acti-
vate in the event of a minor frontal
impact, a side impact or a rear
impact.