Navigator 4WD V8-5.4L VIN 5 (2006)
Seat Belt Buckle: Description and Operation
SAFETY BELT BUCKLE AND PRETENSIONER
NOTE: There is currently no restraint system diagnostic tool for the safety belt buckle pretensioner under the seat connectors. If the ignition switch is
turned to the ON or START position with the safety belt buckle pretensioner electrical connector(s) disconnected, the DTC and flagged faults for an
open circuit will be activated.
The safety belt buckle and pretensioners are for the front outboard occupants, located on the inboard side of the seats. This allows the front safety belt
buckle end to move with the front seat.
The safety belt buckle and 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.