Challenger SRT-8 V8-6.1L (2009)
Seat Belt Tensioner: Description and Operation
Seat Belt Tensioner - Description
DESCRIPTION
The seat belt tensioners supplement the dual front airbags. The seat belt tensioners are integral to the front seat belt retractors (2), which are secured to
the inner quarter panel(1) on the right and left sides of the vehicle. The retractor is concealed beneath the lower quarter trim panel. The seat belt
tensioner consists of a sprocket/pinion, a steel tube, a cast metal housing, numerous steel balls, a stamped metal ball trap, a torsion bar, a small
pyrotechnically activated gas generator, and a short pigtail wire. All of these components are located on one side of the retractor spool on the outside of
the retractor housing except for the torsion bar, which serves as the spindle upon which the retractor spool rides. The seat belt tensioners are controlled
by the Occupant Restraint Controller (ORC) and are connected to the vehicle electrical system through the body wire harness (3).
The seat belt tensioners cannot be repaired and, if faulty or damaged, the entire front seat belt and retractor unit must be replaced. If the front airbags
have deployed, the seat belt tensioners have also deployed. The seat belt tensioners are not intended for reuse and must be replaced following any front
airbag deployment. A growling or grinding sound while attempting to operate the seat belt retractor is a sure indication the seat belt tensioner has been
deployed and requires replacement. Refer to the proper Body Diagnostic Procedures manual for diagnosis and testing.