Seat Belt Tensioner: Description and Operation

CONSTRUCTION AND OPERATION

SYSTEM OPERATION (FRONT AIR BAGS AND SEAT BELT WITH PRE-TENSIONER)




In case of a frontal collision, if the SRS-ECU and the front air bag safing G-sensor simultaneously detect an impact that based on criteria (turn ON), the SRS-ECU sends an ignition signal to the air bag modules (squibs) and seat belt pre-tensioners (squibs) on the driver and passenger sides, thus inflating the air bags and operating the seat belt pre-tensioners.