warning SUBARU IMPREZA 2007 3.G Service Manual

1-38Seat, seatbelt and SRS airbags
! Components
1) Airbag control module (including impact
sensors)
2) Frontal airbag module (Driver ’s side)
3) Frontal airbag module (Front passen- ger’s side)
4) Front sub sensor (Left-hand side)
5) Front sub sensor (Right-hand side)
6) Side airbag module (Driver ’s side)
7) Side airbag module (Front passenger ’s
side)
8) Side airbag sensor (Center pillar left- hand side)
9) Side airbag sensor (Center pillar right- hand side)
10) Airbag wiring (Yellow)
11) Seatbelt pretensioner (Driver ’s side)
12) Seatbelt pretensioner (Front passenger ’s
side)
13) Seatbelt buckle switch (Front passen- ger’s side)
14) Seatbelt buckle switch (Driver ’s side)
15) Driver ’s seat position sensor
16) Front passenger ’s seatbelt tension sen-
sor
17) Front passenger ’s occupant detection
system weight sensor
18) Front passenger ’s occupant detection
control module
19) Front passenger ’s frontal airbag ON and
OFF indicator
20) SRS airbag system warning light

&Subaru advanced frontal air-
bag system
Your vehicle is equipped with a Subaru
advanced frontal airbag system that com-
plies with the new advanced frontal airbag
requirements in the amended Federal
Motor Vehicle Safety Standard (FMVSS)
No. 208.
The Subaru advanced frontal airbag sys-
tem automatically determines the deploy-
ment force of the driver ’s SRS frontal
airbag at the time of deployment as well as
whether or not to activate the frontpassenger ’s SRS frontal airbag and, if
activated, the deployment force of the
SRS frontal airbag at the time of deploy-ment.
Your vehicle has warning labels on the driver ’s and front passenger ’s sun visors
beginning with the phrase “EVEN WITH
ADVANCED AIR BAGS ”and a tag
attached to the glove box lid beginning
with the phrase “Even with Advanced Air
Bags ”. Make sure that you carefully read
the instructions on the warning labels and tag.
Always wear your seatbelt. The Subaru
advanced frontal airbag system is a
supplemental restraint system and must
be used in combination with a seatbelt. All
occupants should wear a seatbelt or be
seated in an appropriate child restraint system.
The driver
’s SRS frontal airbag is stowed
in the center portion of the steering wheel.
The front passenger ’s SRS frontal airbag
is stowed near the top of the dashboard
under an “SRS AIRBAG ”mark.
In a moderate to severe frontal collision,
the driver ’s and front passenger ’s SRS
frontal airbags deploy and supplement the
seatbelts by reducing the impact on thedriver ’s and front passenger ’s head and
chest.
WARNING
NEVER INSTALL A REARWARD FA-
CING CHILD SEAT IN THE FRONT
SEAT. DOING SO RISKS SERIOUS
INJURY OR DEATH TO THE CHILD BY PLACING THE CHILD
’S HEAD
TOO CLOSE TO THE SRS AIRBAG.
WARNING
Never allow a child to stand up, or to
kneel on the front passenger ’s seat.
The SRS airbag deploys with con-
siderable force and can injure or
even kill the child. Seat, seatbelt and SRS airbags
1-39
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1-40Seat, seatbelt and SRS airbags
WARNING
Never hold a child on your lap or in
your arms. The SRS airbag deploys
with considerable force and can
injure or even kill the child.WARNING
The SRS airbag deploys with con-
siderable speed and force. Occu-
pants who are out of proper position
when the SRS airbag deploys could
suffer very serious injuries. Be-
cause the SRS airbag needs enough
space for deployment, the driver
should always sit upright and well
back in the seat as far from the
steering wheel as practical while
still maintaining full vehicle control
and the front passenger should
move the seat as far back as
possible and sit upright and well
back in the seat.
It is also important to wear your seatbelt to help avoid injuries that
can result when the SRS airbag
contacts an occupant not in proper
position such as one thrown toward
the front of the vehicle during pre-
accident braking.
WARNING
Do not put any objects over the
steering wheel pad and dashboard.
If the SRS frontal airbag deploys,
those objects could interfere with its
proper operation and could be pro-
pelled inside the vehicle and cause
injury.

WARNING
Do not attach accessories to the
windshield, or fit an extra-wide mir-
ror over the rear view mirror. If the
SRS airbag deploys, those objects
could become projectiles that could
seriously injure vehicle occupants.
! Driver ’s SRS frontal airbag
The driver ’s SRS frontal airbag uses a
dual stage inflator. The inflator operates in
different ways depending on the severity
of impact, backward-forward adjustment
of the driver ’s seat position and whether or
not he/she is wearing the seatbelt.
The backward-forward adjustment of the driver ’s seat position is monitored by the driver
’s seat position sensor under the
driver ’s seat.
Whether or not the driver is wearing the
seatbelt is monitored by the seatbelt
buckle switch.
Observe the following precautions. Failure
to do so may cause the seatbelt buckle
switch and/or the seat position sensor to
malfunction, preventing the Subaru ad-
vanced frontal airbag system from func-
tioning correctly or causing the system tofail. . Do not place articles/metal objects or
install any accessory other than a genuine
SUBARU accessory under the driver ’s
seat. Do not allow the rear seat occupant
to kick the driver ’s seat or push up its
bottom surface with his/her feet. . Do not place a magnet near the
seatbelt buckle or under the driver ’s seat.
If the seatbelt buckle switch and/or the driver ’s seat position sensor have failed,
the SRS airbag system warning light will
illuminate. Although the driver ’sSRS
frontal airbag can deploy regardless of
the backward-forward adjustment of the
driver ’s seat position even when the
warning light is on, have the system
inspected by your SUBARU dealer im-
mediately if the SRS airbag system warn-
ing light comes on. NOTE
The driver
’s SRS side airbag and
seatbelt pretensioner are not controlled
by the Subaru advanced frontal airbagsystem. ! Front passenger ’s SRS frontal air-
bag
The front passenger ’s SRS frontal airbag
uses a dual stage inflator. The inflator
operates in different ways depending on
the severity of impact.
The total load on the seat is monitored by
the occupant detection system ’s weight
sensor located under the seat.
The system has another sensor that
monitors the tension of the front passen-
ger seatbelt. Using the total seat load and
seatbelt tension data from the sensors,
the occupant detection system determines
whether the front passenger ’s SRS frontal
airbag should or should not be inflated.
The occupant detection system may not
inflate the front passenger ’s SRS frontal
airbag even when the driver ’s SRS frontal
airbag deploys. This is normal.
Observe the following precautions. Failure
to do so may prevent the Subaru ad-
vanced frontal airbag system from func-
tioning correctly or cause the system to fail. Seat, seatbelt and SRS airbags
1-41
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1-42Seat, seatbelt and SRS airbags
. Do not apply any strong impact to the
front passenger ’s seat such as by kicking.
. Do not spill liquid on the front passen-
ger ’s seat. If liquid is spilled, wipe it off
immediately. . Do not remove or disassemble the front
passenger ’s seat.
. Do not install any accessory (such as
an audio amplifier) other than a genuine
SUBARU accessory under the front pas-senger ’s seat.
. Do not place anything (shoes, umbrel-
la, etc.) under the front passenger ’s seat.
. The front passenger ’s seat must not be
used with the head restraint removed. . Do not leave any article including a
child restraint system on the front passen- ger ’s seat or the seatbelt tongue and
buckle engaged when you leave yourvehicle. . Do not place a magnet near the
seatbelt buckle and the seatbelt retractor.. Do not use front seats with their back-
ward-forward position and seatback not
being locked into place securely. If any of
them are not locked securely, adjust them
again. For adjusting procedure, refer tothe “Front seats ”section in this chapter.
. If you use an optional seatbelt exten-
der, remove it after each use. (Refer to the“ Seatbelt extender ”section in this chap- ter.)
If the seatbelt buckle switch and/or front passenger
’s occupant detection system
have failed, the SRS airbag system
warning light will illuminate. Have the
system inspected by your SUBARU deal-
er immediately if the SRS airbag system
warning light comes on.
If your vehicle has sustained impact, this
may affect the proper function of the
Subaru advanced frontal airbag system.
Have your vehicle inspected at your
SUBARU dealer.
NOTE
The front passenger ’s SRS side airbag
and seatbelt pretensioner are not con-
trolled by the Subaru advanced frontal
airbag system. !
Passenger ’s frontal airbag ON and
OFF indicators
ON or: Front passenger ’s frontal airbag
ON indicator
or: Front passenger ’s frontal airbag
OFF indicator
The front passenger ’s frontal airbag ON
and OFF indicators show you the status of
the front passenger ’s SRS frontal airbag.
The indicators are located next to the
clock in the center portion of the dash-board.
When the ignition switch is turned to the “ ON ”position, both the ON and OFF
indicators illuminate for 6 seconds during
which time the system is checked. Follow-
ing the system check, both indicators
extinguish for 2 seconds. After that, one
of the indicators illuminates depending on

the status of the front passenger’s SRS
frontal airbag determined by the Subaru
advanced frontal airbag system monitor-ing.
If the front passenger ’s SRS frontal airbag
is activated, the passenger ’s frontal airbag
ON indicator will illuminate while the OFF
indicator will remain extinguished.
If the front passenger ’s SRS frontal airbag
is deactivated, the passenger ’s frontal
airbag ON indicator will remain extin-
guished while the OFF indicator willilluminate.
With the ignition switch turned to the “ON ”
position, if both the ON and OFF indica-
tors remain lit or extinguished simulta-
neously even after the system check
period, the system is faulty. Contact your
SUBARU dealer immediately for an in-spection. ! Conditions in which front passen- ger’s SRS frontal airbag is not
activated
The front passenger ’s SRS frontal airbag
will not be activated when any of the
following conditions are met regarding the
front passenger ’s seat:
. The seat is empty.
. The seat is equipped with a rearward
facing child restraint system and an infant
is restrained with it. (See WARNING that follows.) .
The seat is equipped with a forward
facing child restraint system and a small
child is restrained with it. (See WARNING
that follows.) . The seat is equipped with a booster
seat and a small child is in the booster
seat. (See WARNING that follows.) . The seat is relieved of the occupant
load for a time exceeding the predeter-
mined monitoring time period. . The seat is occupied by a child who
has outgrown a child restraint system
(See WARNING that follows.) or by a
small adult. . The front passenger ’s occupant detec-
tion system is faulty.
WARNING
NEVER INSTALL A REARWARD FA-
CING CHILD SEAT IN THE FRONT
PASSENGER ’S SEAT EVEN IF THE
FRONT PASSENGER ’S SRS FRON-
TAL AIRBAG IS DEACTIVATED. Be
sure to install it in the REAR seat in
a correct manner. Also, it is strongly
recommended that any forward fa-
cing child seat or booster seat be
installed in the REAR seat, and that
even children who have outgrown a
child restraint system be also seated in the REAR seat. This is
because children sitting in the frontpassenger
’s seat may be killed or
severely injured should the frontpassenger ’s SRS frontal airbag de-
ploy. REAR seats are the safest
place for children.
When the front passenger ’s seat is occu-
pied by a child, observe the following
precautions. Failure to do so may increase
the load on the front passenger ’s seat,
activating the front passenger ’sSRS
frontal airbag even though that seat is
occupied by a child. . Do not place any article on the seat
other than the child occupant and a child
restraint system. . Do not place more than one child on
the seat.. Do not install any accessory such as a
table or TV onto the seatback.. Do not store a heavy load in the
seatback pocket.. Do not allow the rear seat occupant to
place his/her hands or legs on the front passenger ’s seatback, or allow him/her to
pull the seatback. Seat, seatbelt and SRS airbags
1-43
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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.

!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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