SUBARU IMPREZA WRX 2007 3.G Manual PDF

1-46Seat, seatbelt and SRS airbags
bought your vehicle. !
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.
The Subaru advanced frontal airbag sys-
tem is designed to determine the activa-
tion or deactivation condition of the frontpassenger ’s SRS frontal airbag depend-
ing on the total load on the front passen-ger ’s seat monitored by the front passen-
ger ’s occupant detection system weight
sensor. For this reason, only the driver ’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 inside both front
fenders and the impact sensors in the
airbag control module detect a predeter-
mined 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 passen-
ger ’s modules) instructing the module(s)
to inflate the SRS frontal airbag(s). Thedriver ’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, backward-forward adjustment of
the driver ’s seat position and fastening/
unfastening of the seatbelt in the case of
the driver ’s SRS frontal airbag and de-
pending on the severity of impact and the total load on the seat in the case of the
front passenger
’s SRS frontal airbag. After
deployment, the SRS airbag immediately
starts 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 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.
Although it is highly unlikely that the SRS
airbag would activate in a non-accident
situation, should it occur, the SRS airbag
will deflate quickly, not obscuring vision
and will not interfere with the driver ’s
ability to maintain control of the vehicle.
When the SRS airbag deploys, 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 airbag system
components around the steering
wheel and dashboard with bare hands right after deployment. Doing
so can cause burns because the
components can be very hot as a
result of deployment.
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. It is basically not designed
to deploy in lesser frontal impacts be-
cause the necessary protection can be
achieved by the seatbelt alone. Also, they
are basically not designed to deploy in
side or rear impacts or in roll-over acci-
dents because deployment of only thedriver ’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. Seat, seatbelt and SRS airbags
1-47
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1-48Seat, seatbelt and SRS airbags
! Example of accident in which the driver ’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. !
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 occur.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). If the vehicle strikes
an object, such as a telephone pole or
sign pole, or if it slides under a truck ’s load
bed, or if it sustains an oblique offset
frontal impact, the driver ’s/driver ’sand
front passenger ’s SRS frontal airbag(s)
may not deploy depending on the level of
accident forces involved. !
Examples of the types of accidents
in which the driver ’s/driver ’s and
front passenger ’s SRS frontal
airbag(s) will basically not deploy.
The driver ’s and front passenger ’s SRS
frontal airbags are designed basically not Seat, seatbelt and SRS airbags
1-49
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1-50Seat, seatbelt and SRS airbags
to deploy 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
The SRS side airbag is stored in the door
side of each front seat seatback, which
bears an “SRS AIRBAG ”label.
In a moderate to severe side impact
collision, the SRS side airbag on the
impacted side of the vehicle deploys
between the occupant and the door panel
and supplements the seatbelt by reducing
the impact on the occupant ’s chest and
head.
WARNING
The SRS side airbag is designed as
only a supplement to the primary
protection provided by the seatbelt.
They do not do away with the need
to fasten seatbelts. It is also impor-
tant to wear your seatbelt to help
avoid injuries that can result when
an occupant is not seated in a
proper upright position.
WARNING
Do not sit or lean unnecessarily
close to either front door. The SRS
side airbag is stored in both front
seat seatbacks next to the door, and
it provides protection by deploying
rapidly (faster than the blink of an
eye) in the event of a side impact
collision. However, the force of SRS
side airbag deployment may cause
injuries if your head or other parts of
the body are too close to the SRS
side airbag.

WARNING
Do not rest your arm on either front
door or its internal trim. It could be
injured in the event of SRS side
airbag deployment.
WARNING
Never allow a child to kneel on the
front passenger ’s seat facing the
side window or to wrap his/her arms
around the front seat seatback. In the event of an accident, the force of
the SRS side airbag deployment
could injure the child seriously
because his/her head or arms or
other parts of the body are too close
to the SRS side airbag. Since your
vehicle is also equipped with apassenger
’s SRS frontal airbag,
children aged 12 and under should
be placed in the rear seat anyway
and should be properly restrained at
all times.WARNING
Do not attach accessories to the
door trim or near either SRS side
airbags and do not place objects
near the SRS side airbags. In the Seat, seatbelt and SRS airbags
1-51
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1-52Seat, seatbelt and SRS airbags
event of the SRS side airbag deploy-
ment, they could be propelled dan-
gerously toward the vehicle ’s occu-
pants and cause injuries.
WARNING
Do not put any kind of cover or
clothes or other objects over either
front seatback and do not attach
labels or stickers to the front seat
surface on or near the SRS side
airbag. They could prevent proper
deployment of the SRS side airbag,
reducing protection available to the
front seat ’s occupant. !
Operation
1) SRS side airbag deploys as soon as a
collision occurs.
2) SRS side airbag protects the front passenger ’s head and chest.
3) After deployment, SRS side airbag starts to deflate immediately. The SRS side airbag can function only
when the ignition switch is in the
“ON ”
position.
The driver ’s and front passenger ’s SRS
side airbags deploy independently of each
other since each has its own impact
sensor. Also, the SRS side airbag deploys
independently of the frontal airbags in the
steering wheel and instrument panel.
An impact sensor is incorporated into
each of the vehicle ’s center pillars. If
either sensor detects a certain predeter-
mined amount of force during a side
impact collision, the control module sends
a signal to the side airbag module on the
impacted side of the vehicle, instructing it
to inflate the SRS side airbag. Then the
side airbag module produces gas, which
instantly inflates the SRS side airbag.
After deployment, the SRS side airbag
will deflate in a few seconds.
The SRS side airbag deploys even when
no one occupies the seat on the side on
which an impact is applied.
When the SRS side airbag deploys, a
sudden, fairly loud inflation noise will be
heard and some smoke will be released.
These occurrences are 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 compo-
nents can be very hot as a result ofdeployment.
The SRS side airbag is designed to
deploy in the event of an accident invol-
ving a moderate to severe side impact
collision. It is basically not designed to
deploy in a lesser side impact. Also, it is
basically not designed to deploy in frontal
or rear impacts because SRS side airbag
deployment would not help the occupant
in those situations.
Each SRS side airbag is designed to
function on a one-time-only basis.
SRS side airbag deployment depends on
the level of force experienced in the
passenger compartment 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 vehicle itself. !
Example of the type of accident in
which the SRS side airbag will most
likely deploy.
A severe side impact near the front seat
activates the SRS side airbag. Seat, seatbelt and SRS airbags
1-53
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1-54Seat, seatbelt and SRS airbags
! Examples of the types of accidents in which the SRS side airbag is 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 deployment. In the event of acci-
dents like those illustrated, the SRS side
airbag may not deploy depending on the
level of accident forces involved.

!Examples of the types of accidents
in which the SRS side airbag will
basically not deploy.
1) The vehicle is involved in a frontal
collision with another vehicle (moving or stationary).
2) The vehicle is struck from behind. The SRS side airbag is basically not
designed to deploy if the vehicle is
involved in a frontal collision or is struck
from behind. Examples of such accidents
are illustrated.
1) First impact
2) Second impact
In an accident where the vehicle is struck
from the side more than once, the SRS
side airbag deploys only once on the firstimpact.
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
is activated on the first impact, it will not be
activated on the second. &
SRS airbag system monitors
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.
The following components are monitored
by the indicator: . Front sub sensor (Right-hand side)
. Front sub sensor (Left-hand side)
. Airbag control module (including im-
pact sensors). Frontal airbag module (Driver ’s side)
. Frontal airbag module (Front passen-Seat, seatbelt and SRS airbags
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