SRS Airbag Construction and Operation – Seat position airbag sensor


The seat position airbag sensor is used because of the adoption of the dual-stage inflator in the driver’s airbag. The seat position airbag sensor is installed on the seat rail under the driver’s seat. It detects the driver’s physique according to the seat’s sliding position, and sends the signal to the center airbag sensor assembly. The center airbag sensor assembly gently deploys the airbag when the seat position is forward and the deceleration speed is low.
The seat position airbag sensor detects two levels of position where the magnetic line of flux is cut (backward of the seat) and is not cut (forward of the seat) by the cut-off plate installed on the back of the seat rail.

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