FORD 2009 F-150 v.1 - Manual (Page 172)

Safety belt usage sensors
The driver and front outboard passenger safety belt buckles are
equipped with sensors that detect if the safety belts are fastened. The
sensors provide information to the Personal Safety System
௡ which can
then adapt the airbag deployment or safety belt pretensioner activation
based upon safety belt usage.
WARNING: The Personal Safety System
௡ provides the most
benefit to belted occupants. The system monitors and tailors the
air bag deployment based upon safety belt usage. Failure to properly
wear your safety belt will increase your risk of injury.
Front safety belt height adjustment
Your vehicle has safety belt height
adjustments at the front outboard
seating positions. Adjust the height
of the shoulder belt so the belt rests
across the middle of your shoulder.
To adjust the shoulder belt height,
pull on the center button and slide
the height adjuster up or down.
Release the button and pull down
on the height adjuster to make sure
it is locked in place.
WARNING: Position the safety belt height adjusters so that the
belt rests across the middle of your shoulder. Failure to adjust
the safety belt properly could reduce the effectiveness of the safety
belt and increase the risk of injury in a collision.
2009 F-150 (f12)
Owners Guide, 1st Printing
USA (fus)
Seating and Safety Restraints
172