F 350 4WD Super Duty V8-6.0L DSL Turbo VIN P (2004)
Seat Belt Tensioner: Description and Operation
Safety Belt System
PRETENSIONER SYSTEM
All Excursion and F-Super Duty vehicles have a pretensioner system for the front outboard occupants. The front outboard safety belt retractors or the
front outboard safety belt buckles use a pretensioner system. This works in conjunction with the front air bag system mounted in the steering wheel
and instrument panel.
If the vehicle is involved in a collision that results in deployment of the front air bags and safety belt pretensioners, the driver and passenger seat belt
system (including safety belt buckle and pretensioners or safety belt retractor and pretensioners, safety belt retractors, safety belts, buckles and height
adjusters), must be replaced.
For diagnostic information, refer to Air Bag Systems.
For pretensioner retractor disposal information, refer to Air Bag Systems.
SAFETY BELT BUCKLE PRETENSIONER
A SuperCab vehicle with seat integrated restraints (SIR) is equipped with safety belt buckle pretensioners. These are for the front outboard occupants,
located on the inboard side of the seats. To identify a SIR seat, refer to Seat Integrated Restraints (SIR) Identification.
The safety belt buckle pretensioner is a pyrotechnic device that removes excess webbing from the safety belt system. When the front air bag system is
deployed, the pretensioner in the buckle deploys, causing the buckle to move downward, pulling excess webbing from the lap and shoulder safety
belts.
For safety belt buckle pretensioner diagnostic information, refer to Air Bag Systems.
For safety belt buckle pretensioner disposal information, refer to Air Bag Systems.
SAFETY BELT RETRACTOR PRETENSIONER
All vehicles without seat integrated restraints (SIR) are equipped with safety belt retractor pretensioners for the front outboard occupants. To identify a
SIR seat, refer to Seat Integrated Restraints (SIR) Identification.
When the pretensioner in the retractor deploys, causing the retractor spool to rotate, the rotating spool action removes excess webbing from the safety
belt assembly. This causes the webbing to tighten around the occupant.
For safety belt retractor pretensioner diagnostic information, refer to Air Bag Systems.
For safety belt retractor pretensioner disposal information, refer to Air Bag Systems.
