Subaru WRX-STI Owner's Manual page 80

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Seat, seatbelt and SRS airbags/*SRS airbag (Supplemental Restraint System airbag)
! Operation
A) Driver s side
B) Passenger s side
1) SRS AIRBAGs deploy as soon as a collision occurs.
2) After deployment, SRS AIRBAGs start to deflate immediately so that the driver s vision is not
obstructed.
The SRS airbag can function only when
the ignition switch is in the ON position.
If the front sub sensors located on both the
right and left sides at the front of the
vehicle and the impact sensors in the
airbag control module detect a certain
predetermined amount of force during a
frontal collision, the control module sends
signals to the frontal airbag modules
instructing them to inflate the SRS frontal
airbags. Then both airbag modules pro-
duce gas, which instantly inflates driver s
and passenger s SRS frontal airbags. The
knee airbag is also inflated in combination
with the SRS frontal airbags.
After deployment, the SRS airbags im-
mediately start to deflate so that the
driver s vision is not obstructed. The time
required from detecting impact to the
deflation of the SRS airbag after deploy-
ment is shorter than the blink of an eye.
If the vehicle is equipped with the occu-
pant detection system for the front pas-
senger s seat, the SRS system detects
whether the front passenger s seat is
occupied by a passenger or not. If the
seat is not occupied, the system does not
inflate the front passenger s SRS airbag.
Although it is highly unlikely that the SRS
airbag would activate in a non-accident