Seat Belt Retractor: Description and Operation

DRIVER SAFETY BELT RETRACTOR AND PRETENSIONER

In the event of a front impact the air bag control module will deploy the pretensioner provided the safety belt buckle is fastened. The driver safety belt retractor pretensioner has a lower deployment threshold than that required by the air bags. Hence it is possible during a minor collision, which exceeds the deployment threshold, that only the safety belt pretensioner will deploy. The air bag control module receives information on the status of the safety belt buckle from a switch contained in the buckle.

A new driver safety belt retractor and pretensioner must be installed following deployment.