unit must be replaced. The retractor tensioners are not intended for reuse and must be replaced following any
front airbag deployment. A locked retractor that will not allow the seat belt webbing to be retracted or extracted
is a sure indication that the seat belt tensioner has been deployed and requires replacement. See REMOVAL.
BUCKLE TENSIONER
Fig. 82: Identifying Molded Plastic Scabbard, Buckle, Pigtail Harnesses, Steel Cylinder Tube & Bracket
Courtesy of CHRYSLER LLC
Seat belt buckle tensioners supplement the dual front and side curtain airbags for all versions of this vehicle.
These tensioners are integral to the front seat belt buckle units, which are secured by a large screw to the outside
of the inboard seat cushion frames of the right and left front seats. The buckle tensioner consists primarily of a
buckle (2), a molded plastic scabbard (1), a cable and piston, a cable guide and bracket (5), a steel cylinder tube
(4), and a small pyrotechnically activated gas generator.
The buckle tensioners are controlled by the Occupant Restraint Controller (ORC) and are connected to the
vehicle electrical system through a dedicated take out of the seat wire harness by a keyed and latching yellow
molded plastic connector insulator to ensure a secure connection. The buckle tensioner connector for the driver
side is shared by two pigtail harnesses (3): one two-wire squib pigtail and a second two-wire pigtail for the
integral seat belt switch.
The buckle tensioners cannot be repaired and, if ineffective or damaged, the entire front seat belt buckle unit
must be replaced. If the front airbags have been deployed, the buckle tensioners have also been deployed. The
buckle tensioners are not intended for reuse and must be replaced following any front airbag deployment. See
REMOVAL.
OPERATION
SEAT BELT TENSIONER
The seat belt retractor tensioners and buckle tensioners are deployed by a signal generated by the Occupant
Restraint Controller (ORC) through the driver or passenger seat belt tensioner line 1 and line 2 (or squib)
circuits. When the ORC sends the proper electrical signal to the tensioners, the electrical energy generates
2007 Dodge Nitro R/T
2007 RESTRAINTS Service Information - Nitro