Seat Belt Tensioner: Description and Operation

Seat Belt Tensioners:

Seat Belt Tensioners
The seat belt tensioners are linked with the SRS airbags to further increase the effectiveness of the seat belts. In a front end collision, the tensioners instantly retract the belts firmly to secure the occupants in their seats.


For the SRS to operate:
1. One or both safing sensor and one or both dash sensors must activate.
2. Electrical energy must be supplied to the airbag inflator by the battery, or the back-up power circuit if the battery voltage is too low.
3. Airbag and seat belt tensioner charges must be released. Then the airbags will deploy and the tensioners will activate.