Subaru WRX & WRX STI Manuals 2017 WRX & WRX STI Owner’s Manual | Page 85

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Seat, seatbelt and SRS airbags/*SRS airbag (Supplemental Restraint System airbag)

SRS curtain airbag deploys independently
of the driver’s and front passenger’s SRS
frontal airbags in the steering wheel and
instrument panel.
An impact sensor, which senses impact
force, is located in each of the following
locations.
. In the left and right front doors
. In the left and right center pillars
. In the left and right rear wheel houses
. Under the rear center seat
. On both sides of the radiator panel
(frontal impact sensor)
The rollover sensor and frontal impact
sensor are located inside the airbag
control module, which is located under
the center of the instrument panel.
If the impact sensor that is located under
the rear center seat and one of the center
pillar impact sensors or front door impact
sensors together sense an impact force
above a predetermined level in a side
collision, the control module causes both
the SRS side airbag and curtain airbag on
the impacted side to inflate regardless of
whether the rear wheel house impact
sensor on the same side senses an
impact.
If the impact sensor that is located under

the rear center seat and one of the rear
wheel house impact sensors together
sense an impact force above a predetermined level in a side collision, the control
module causes only the SRS curtain
airbag on the impacted side to inflate.

After the deployment, the SRS side airbag
immediately starts to deflate. The time
required from detection of an impact to
deflation of an SRS side airbag after
deployment is shorter than the blink of
an eye.

Even if a frontal collision occurs, the SRS
curtain airbags will deploy when the front
sensor and the control unit determine that
the impact results from an offset frontal
collision.

The SRS curtain airbag remains inflated
for a while following deployment then
slowly deflates.

The SRS curtain airbags are designed to
deploy when the driver’s SRS frontal
airbag deploys or the driver’s and passenger’s SRS frontal airbags deploy in a
frontal collision, and also when the system
determines that the collision is an offset
frontal collision. The SRS curtain airbags
are basically designed not to deploy in a
frontal collision when the SRS frontal
airbags do not deploy or the system
determines that the collision is other than
an offset frontal collision.
If the rollover sensor detects a vehicle
rollover, the control module inflates the
SRS curtain airbags on both sides. At this
time, the driver’s seatbelt pretensioner
and front passenger’s seatbelt pretensioner (shoulder belt pretensioner only)
also operate simultaneously.

The SRS side airbag and SRS curtain
airbag deploy even when no one occupies
the seat on the side on which an impact is
applied.
When the SRS side airbag and SRS
curtain airbag deploy, a sudden, fairly loud
inflation noise will be heard and some
smoke will be released. These occurrences are a normal result of the deployment. This smoke does not indicate a fire
in the vehicle.

CAUTION
Do not touch the SRS side airbag
system components around the
front seat seatback with bare hands
right after deployment. Doing so can
cause burns because the components can be very hot as a result of
deployment.
After deployment, do not touch any