2013 SUBARU IMPREZA WRX belt

1-48Seat, seatbelt and SRS airbags
! SRS frontal 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 SUBARU advanced frontal airbag
system is designed to determine the
activation or deactivation condition of the
front passenger
’s SRS frontal airbag
depending on the total load on the frontpassenger ’s seat monitored by the front
passenger ’s occupant detection system
weight sensor. For this reason, only thedriver ’s SRS frontal airbag may deploy in
the event of a collision, but this does not
mean failure of the system.
If the front sub sensors and the impact
sensors in the airbag control module
detect a predetermined amount of force
during a frontal collision, the control
module sends signals to the airbag
module(s) (only driver ’s module or both
driver ’s and front passenger ’s modules)
instructing the module(s) to inflate the
SRS frontal airbag(s). The driver ’s and
front passenger ’s SRS frontal airbags use
dual stage inflators.
The two inflators of each airbag are
triggered either sequentially or simulta-
neously, depending on the severity of
impact, in the case of the driver ’s SRS
frontal airbag and depending on the
severity of impact and the total load on
the seat in the case of the front passen-ger ’s SRS frontal airbag.

After deployment, the SRS airbag imme-
diately starts to deflate so that the driver’s
vision is not obstructed and the driver ’s
ability to maintain control of the vehicle is
not impaired. The time required from
detecting impact to the deflation of the
SRS airbag after deployment is shorter
than the blink of an eye.
Both when only the driver ’s SRS frontal
airbag deploys and the driver ’s and front
passenger ’s SRS frontal airbags deploy,
the driver ’s and front passenger ’s seatbelt
pretensioners operate at the same time.
The driver ’s SRS frontal airbag and front
passenger ’s SRS frontal airbag are de-
signed to deploy in the event of an
accident involving a moderate to severe
frontal collision. They are not designed to
deploy in most lesser frontal impacts
because the necessary protection can be
achieved by the seatbelt alone. Also, they
are not designed to deploy in most side or
rear impacts or in most roll-over accidents
because deployment of only the driver ’s
SRS frontal airbag or both driver ’s and
front passenger ’s SRS frontal airbags
would not help the occupant in those
situations. The driver ’s and front passen-
ger ’s SRS frontal airbags are designed to
function on a one-time-only basis.
SRS airbag deployment depends on the level of force experienced in the passen-
ger compartment during a collision. That
level differs from one type of collision to
another, and it may have no bearing on
the visible damage done to the vehicleitself.
!
Example of accident in which thedriver ’s/driver ’s and front passen-
ger ’s SRS frontal airbag(s) will most
likely deploy
A head-on collision against a thick con-
crete wall at a vehicle speed of 12 to 19
mph (20 to 30 km/h) or higher activates
only the driver ’s SRS frontal airbag or both
driver ’s and front passenger ’s SRS frontal
airbags. The airbag(s) will also be acti-
vated when the vehicle is exposed to a
frontal impact similar in fashion and
magnitude to the collision describedabove. Seat, seatbelt and SRS airbags
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1-50Seat, seatbelt and SRS airbags
! Examples of the types of accidents
in which it is possible that thedriver ’s/driver ’s and front passen-
ger ’s SRS frontal airbag(s) will de-
ploy
Only the driver ’s SRS frontal airbag or
both driver ’s and front passenger ’s SRS
frontal airbags may be activated when the
vehicle sustains a hard impact in the
undercarriage area from the road surface
(such as when the vehicle plunges into a
deep ditch, is severely impacted or
knocked hard against an obstacle on the
road such as a curb).

!Examples of the types of accidents in which deployment of the driver ’s/driver ’s
and front passenger ’s SRS frontal airbag(s) is unlikely to occur1) The vehicle strikes an object, such as a
telephone pole or sign pole.
2) The vehicle slides under the load bed of a truck.
3) The vehicle sustains an oblique offset frontal impact.
4) The vehicle sustains an offset frontal collision.
5) The vehicle strikes an object that can move or deform, such as a parked vehicle.
There are many types of collisions which
might not necessarily require deployment
of driver ’s/driver ’s and front passenger ’s
SRS frontal airbag(s). In the event of
accidents like those illustrated, the dri-ver ’s/driver ’s and front passenger ’s SRS
frontal airbag(s) may not deploy depend-
ing on the level of accident forces in-volved. Seat, seatbelt and SRS airbags
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1-52Seat, seatbelt and SRS airbags
! Examples of the types of accidents
in which the driver ’s/driver ’s and
front passenger ’s SRS frontal
airbag(s) is/are not designed to
deploy in most cases
The driver ’s and front passenger ’s SRS frontal airbags are designed not to deploy
in most cases if the vehicle is struck from
the side or from behind, or if it rolls onto its
side or roof, or if it is involved in a low-
speed frontal collision.
1) First impact
2) Second impact
In an accident where the vehicle is
impacted more than once, the driver ’s
and/or front passenger ’s SRS frontal
airbag(s) will deploy only once on the firstimpact.
Example: In the case of a double collision,
first with another vehicle, then against a
concrete wall in immediate succession,
once either or both of the driver ’s and front
passenger ’s SRS frontal airbags is/are
activated on the first impact, it/they will not be activated on the second impact. !
SRS side airbag and SRS curtain
airbag operation
The driver ’s and front passenger ’s SRS
side airbags and SRS curtain airbags
deploy independently of each other since
each has its own impact sensor. There-
fore, they may not both deploy in the same
accident. Also, the SRS side airbag and
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 the following locations. . In each of the left and right center
pillars. In each of the rear wheel houses

.Under the rear center seat
The airbag control module causes both the SRS side airbag andSRS curtain
airbag on the impacted side to inflate if
both of the following sensors together
sense an impact force above a predeter-
mined level in a side collision. . One of the center pillar impact sensors
. Impact sensor that is located under the
rear center seat
The airbag control module causes only the
SRS curtain airbag on the impacted side
to inflate if both of the following sensors
together sense an impact force above a
predetermined level in a side collision. . One of the rear wheel house impact
sensors. Impact sensor that is located under the
rear center seat
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.
The SRS curtain airbag remains inflated
for a while following deployment then
slowly deflates.
The SRS side airbag and SRS curtain airbag deploy even when no one occupies
the seat on the side on which an impact isapplied.
The SRS side airbag and SRS curtain
airbag are designed to deploy in the event
of an accident involving a moderate to
severe side impact collision. They are not
designed to deploy in most lesser side
impacts. Also, they are not designed to
deploy in most frontal or most rear impacts
because SRS side airbag and SRS
curtain airbag deployment would not help
the occupant in those situations.
Each SRS side airbag and SRS curtain
airbag are designed to function on a one-
time-only basis.
SRS side airbag and SRS curtain airbag
deployment depend on the level of force
experienced in the passenger compart-
ment during a side impact collision. That
level differs from one type of collision to
another, and it may have no bearing on
the visible damage done to the vehicleitself.
!
Example of the type of accident in
which the SRS side airbag and SRS
curtain airbag will most likely de-ploy
A severe side impact near the front seat
activates the SRS side airbag and SRS
curtain airbag. Seat, seatbelt and SRS airbags
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1-54Seat, seatbelt and SRS airbags
! Examples of the types of accidents in which the SRS side airbag and SRS
curtain airbag are unlikely to deploy
1) The vehicle is involved in an oblique
side-on impact.
2) The vehicle is involved in a side-on impact in an area outside the vicinity of
the passenger compartment.
3) The vehicle strikes a telephone pole or similar object.
4) The vehicle is involved in a side-on impact from a motorcycle.
5) The vehicle rolls onto its side or roof.
There are many types of collisions which
might not necessarily require SRS side
airbag and SRS curtain airbag deploy-
ment. In the event of accidents like those
illustrated, the SRS side airbag and SRS
curtain airbag may not deploy depending
on the level of accident forces involved.

!Examples of the types of accidents
in which the SRS side airbag and
SRS curtain airbag are not designed
to deploy in most cases
1) The vehicle is involved in frontal collision
with another vehicle (moving or station- ary). 2) The vehicle is struck from behind.
The SRS side airbag and SRS curtain
airbag are not designed to deploy in most
cases if the vehicle is involved in a frontal
collision or is struck from behind. Exam-
ples of such accidents are illustrated.
1) First impact
2) Second impact
A) SRS curtain airbag
B) SRS side airbag
In an accident where the vehicle is struck
from the side more than once, the SRS
side airbag and SRS curtain airbag deploy
only once on the first impact.
Example: In the case of a double side
impact collision, first with one vehicle and
immediately followed by another from the
same direction, once the SRS side airbag and SRS curtain airbag are activated on
the first impact, they will not be activated
on the second. &
SRS airbag system monitors
SRS airbag system warning light
A diagnostic system continually monitors
the readiness of the SRS airbag system
(including front seatbelt pretensioners)
while the vehicle is being driven. The
SRS airbag system warning light “AIR-
BAG ”will show normal system operation
by lighting for approximately 6 seconds
when the ignition switch is turned to the“ ON ”position.
Seat, seatbelt and SRS airbags
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