RELAY FWD V6-3.9L VIN 1 (2006)
Seat Belt Tensioner: Description and Operation
INFLATABLE RESTRAINT SEAT BELT RETRACTOR PRETENSIONER
The seat belt retractor pretensioner contains a housing, an initiating device, and a canister of gas generating material. The initiator is part of the seat belt
pretensioner deployment loop. When the vehicle is involved in a collision of sufficient force, the sensing and diagnostic module (SDM) will cause
current to flow through the deployment loops to the initiator. Current passing through the initiator ignites the material in the canister producing a rapid
generation of gas and the release of compressed gas, if present. The gas produced from this reaction rapidly shortens the seat belt buckle height.
Each seat belt retractor pretensioner is equipped with a shorting bar located on the connector of the pretensioner. The shorting bar shorts the seat belt
retractor pretensioner deployment loop circuitry to prevent unwanted deployment of the pretensioner when servicing the seat belt retractor pretensioner.
