Mustang V8-5.4L SC (2008)
Seat Belt Tensioner: Description and Operation
SAFETY BELT RETRACTOR AND PRETENSIONER
The front safety belt retractors use a safety belt pretensioner system. This works in conjunction with the front air bag system and side air bag system. The
pretensioner is a pyrotechnic device that removes excess webbing slack from the safety belt. When activated by the restraints control module (RCM), the
pretensioner deploys in the retractor, removing excess slack from the lap and shoulder safety belt. The pretensioners are activated when the RCM detects
an impact force exceeding a programmed limit.
If the vehicle is involved in a collision that results in deployment of the safety belt pretensioners, a new driver and passenger seat belt system (including
safety belt retractor and pretensioners, safety belt retractors, safety belts, safety belt buckles and safety belt shoulder guides) must be installed.
Each front safety belt shoulder guide includes a 2-position safety belt presenter arm that rotates rearward to allow for occupant rear seat access (stowed
position) and forward for front seat occupant use (worn position).
For safety belt retractor and pretensioner diagnostic information, refer to Air Bag Systems.
For safety belt retractor and pretensioner disposal information, refer to Air Bag Systems.
