2009 SUBARU LEGACY sensor

1-52Seat, seatbelt and SRS airbags
!Operation
1) Driver ’s side
2) Passenger ’s side
The SRS airbag can function only when
the ignition switch is in the “ON ”position.
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 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 simultaneously, depending
on the severity of impact in the case of thedriver ’s SRS frontal airbag and depending
on the severity of impact and the total load
on the seat in the case of the frontpassenger ’s SRS frontal airbag.
After deployment, the SRS airbag imme-
diately 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 short-
er 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.

A hands-free microphone or
other accessory in such a loca-
tion could be propelled through
the cabin with great force by the
curtain airbag, or it could prevent
correct deployment of the curtain
airbag. In either case, the result
could be serious injuries.
. Do not hang coat hangers or
other hard or pointed objects on
the coat hooks. If such items
were hanging on the coat hooks
during deployment of the SRS
curtain airbags, they could cause
serious injuries by coming off the
coat hooks and being thrown
through the cabin or by prevent-
ing deployment of the curtainairbags.
Before hanging clothing on the
coat hooks, make sure there are
no sharp objects in the pockets.
Hang clothing directly on the
coat hooks without using hang-ers.
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. !
OperationThe SRS side airbag and SRS curtain
airbag can function only when the ignition
switch is in the “ON ”position.
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 each of the left and
right center pillars and rear wheel houses.
Another impact sensor, which also senses Seat, seatbelt and SRS airbags
1-59
– CONTINUED –

1-60Seat, seatbelt and SRS airbags
impact force, is located under the rear
center seat.
If one of the center pillar impact sensors
and the impact sensor that is located
under the rear center seat 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 one of the rear wheel house impact
sensors and the impact sensor that is
located under the rear center seat to-
gether sense a sufficiently strong impact
force, 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.
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.
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 occur-
rences are a normal result of the deploy-
ment. 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.
After deployment, do not touch any
part of the SRS curtain airbag
system (from the front pillar to the
part of the roof side over the rear
seat). Doing so can cause burns
because the components can be
very hot as a result of deployment.
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. 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 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.

1-64Seat, seatbelt and SRS airbags
Vehicle without SI-DRIVE
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- ger
’s side)
. Side airbag sensor (center pillar right-
hand side). Side airbag sensor (center pillar left-
hand side). Side airbag module (driver ’s side)
. Side airbag module (front passenger ’s
side). Curtain airbag sensor (rear wheel
house right-hand side). Curtain airbag sensor (rear wheel
house left-hand side). Curtain airbag module (right-hand side)
. Curtain airbag module (left-hand side)
. Satellite safing sensor (under the rear
center seat) . Seatbelt pretensioner (driver ’s side)
. Seatbelt pretensioner (front passen-
ger ’s side)
. Seatbelt buckle switch (front passen-
ger ’s side)
. Front passenger ’s seatbelt tension
sensor . Front passenger ’s occupant detection
system weight sensor. Front passenger ’s occupant detection
control module. Front passenger ’s frontal airbag ON
and OFF indicator. All related wiring
WARNING
If the warning light exhibits any of
the following conditions, there may
be a malfunction in the seatbelt
pretensioners and/or SRS airbag
system. Immediately take your vehi-
cle to your nearest SUBARU dealer
to have the system checked. Unless
checked and properly repaired, the
seatbelt pretensioners and/or SRS
airbags will operate improperly (e.g.
SRS airbags may inflate in a very
minor collision or not inflate in a
severe collision), which may in-
crease the risk of injury. . Flashing or flickering of the warn-
ing light
. No illumination of the warning
light when the ignition switch is
first turned to the “ON ”position
. Continuous illumination of the
warning light
. Illumination of the warning light
while driving

&SRS airbag system servicing
WARNING
. When discarding an airbag mod-
ule or scrapping the entire vehi-
cle damaged by a collision, con-
sult your SUBARU dealer.
. The SRS airbag has no user-
serviceable parts. Do not use
electrical test equipment on any
circuit related to the SRS airbag
system. For required servicing of
the SRS airbag, consult your
nearest SUBARU dealer. Tamper-
ing with or disconnecting the system ’s wiring could result in
accidental inflation of the SRS
airbag or could make the system
inoperative, which may result in
serious injury.
CAUTION
If you need service or repair in areas
listed in the following, have an
authorized SUBARU dealer perform
the work. The SRS airbag control
module, impact sensors and airbag
modules are stored in these areas. . Under the center console
. Inside each front fender
. Steering wheel and column and
nearby areas
. Top of the dashboard on front
passenger ’s side and nearby
areas
. Each front seat and nearby area
. Inside each center pillar
. In each roof side (from the front
pillar to a point over the rear seat)
. Between the rear seat cushion
and rear wheel house on each side
. Under the rear center seat
In the event that the SRS airbag is
deployed, replacement of the system
should be performed only by an author-
ized SUBARU dealer. When the compo-
nents of the SRS airbag system are
replaced, use only genuine SUBARU parts.
NOTE
In the following cases, contact your
SUBARU dealer as soon as possible. . The front part of the vehicle was
involved in an accident in which the
only the driver ’s SRS frontal airbag or
both driver ’s and front passenger ’s
SRS frontal airbags did not deploy.. The pad of the steering wheel, the
cover over the front passenger ’s SRS
frontal airbag, or either roof side (from
the front pillar to a point over the rear
seat) is scratched, cracked, or other-
wise damaged.. Center pillar, rear wheel house or
rear sub frame, or an area near these
parts, was involved in an accident in
which the SRS side airbag and SRS
curtain airbag did not deploy.. The fabric or leather of either front
seatback is cut, frayed, or otherwisedamaged.. The rear part of the vehicle was
involved in an accident. Seat, seatbelt and SRS airbags
1-65
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Keys..................................................................... 2-2
Key number ........................................................ 2-2
Immobilizer .......................................................... 2-3
Security ID plate .................................................. 2-3
Security indicator light ........................................ 2-4
Key replacement ................................................. 2-4
Door locks ........................................................... 2-5
Locking and unlocking from the outside .. ............ 2-5
Locking and unlocking from the inside ................ 2-6
Battery drainage prevention function ................... 2-6
Power door locking switches ............................. 2-7
Key lock-in prevention function ........................... 2-7
Remote keyless entry system ............................ 2-8
Locking the doors ............................................... 2-9
Unlocking the doors ........................................... 2-10
Unlocking the trunk lid/rear gate ......................... 2-10
Vehicle finder function ........................................ 2-10
Sounding a panic alarm ...................................... 2-11
Selecting audible signal operation ...................... 2-11
Replacing the battery ......................................... 2-11
Replacing lost transmitters ................................. 2-13 Alarm system
..................................................... 2-16
System alarm operation ..................................... 2-16
Activating and deactivating the alarm system ..... 2-16
If you have accidentally triggered the alarm system ............................................................ 2-17
Arming the system ............................................ 2-17
Disarming the system ........................................ 2-19
Valet mode ........................................................ 2-19
Passive arming .................................................. 2-19
Tripped sensor identification .............................. 2-20
Shock sensors (dealer option).. .......................... 2-20
Child safety locks .............................................. 2-21
Windows ............................................................. 2-21
Power windows ................................................. 2-21
Trunk lid (Sedan) ............................................... 2-24
To open and close the trunk lid from outside . ..... 2-24
To open the trunk lid from inside. ....................... 2-24
To lock and unlock the trunk lid release lever ................................................................ 2-25
Internal trunk lid release handle ......................... 2-25
Rear gate (Station wagon) ................................ 2-27
Moonroof (if equipped) ...................................... 2-28
Tilting/sliding moonroof (Sedan) ......................... 2-29
Moonroof (Station wagon) .................................. 2-30
Keys and doors
2

2-16Keys and doors
NOTE
Make sure no one else is operating
their remote keyless entry system with-
in range of your vehicle when program-
ming transmitters. If someone else
were to operate their remote transmit-
ter while you are programming your
transmitters, it is possible that their
transmitter code will be programmed
into your system, allowing them un-
authorized access to your vehicle. Alarm system
The alarm system helps to protect your
vehicle and valuables from theft. The horn
sounds and the turn signal lights flash if
someone attempts to break into your
vehicle. The starter motor is also inter-
rupted to prevent starting the vehicle
without a key.
The system can be armed and disarmed
with the remote transmitter.
The system does not operate when the
key is inserted into the ignition switch.
Your vehicle
’s alarm system has been set
for activation at the time of shipment from
the factory. You can set the system for
deactivation yourself or have it done by
your SUBARU dealer. & System alarm operation
The alarm system will give the following
alarms when triggered: . The vehicle ’s horn will sound and the
turn signal lights will flash for 30 seconds.. If any door (or the rear gate/trunk lid)
remains open after the 30-second period,
the horn will continue to sound for a
maximum of 3 minutes. If the door (or
the rear gate/trunk lid) is closed while the
horn is sounding, the horn will stop sounding with a delay of up to 30 seconds.
The alarm is triggered by: .
Opening a door, the rear gate or trunk
lid. Physical impact to the vehicle, such as
forced entry (only vehicles with shock
sensors (dealer option)) NOTE
The alarm system can be set to trigger
illumination of map lights and dome
light. The map lights and dome light
notification is deactivated as the fac-
tory setting. Refer to the “Function
settings ”section that is mentioned
earlier in this manual. A SUBARU deal-
er can activate the system. Contact
your SUBARU dealer for details. & Activating and deactivating
the alarm system
To change the setting of your vehicle ’s
alarm system for activation or deactiva-
tion, do the following.
1. Disarm the alarm system (refer to “ Disarming the system ”in this section).
2. Sit in the driver ’s seat and shut all
doors (and the rear gate if your vehicle is a
Station wagon).
3. Turn the ignition switch to the “ON ”

2-20Keys and doors
position.
1) LOCK
2) ON
2. Turn the ignition switch from “ON ”to
“ LOCK ”position and remove the key from
the ignition switch.
3. Open the doors and get out of the vehicle.4. Before closing the doors, lock all doors
with the inside door lock levers.
5. Close the doors. The system will
automatically arm after one minute.
In the passive mode, the system can also
be armed with the remote transmitter or
with the power door locking switches. If
the remote transmitter or power door
locking switch is used to lock the vehicle,
arming will take place immediately regard-
less of whether or not the passive mode
has been selected. ! Disarming the system
To disarm the system, briefly press the “
” button on the transmitter. &
Tripped sensor identification
The security indicator light flashes when
the alarm system has been triggered.
Also, the number of flashes indicates the
location of unauthorized intrusion or the
severity of impact on the vehicle. . When the ignition switch is turned to
the “ON ”position, the indicator light will
light for 1 second and then flash as follows:
When a door or rear gate (Station
wagon) was opened: 5 times
When the trunk (Sedan) was opened:
4 times
Whenastrongimpactormultiple
impacts were sensed: twice (only
vehicles with shock sensors (dealeroption))
When a light impact was sensed: once
(only vehicles with shock sensors
(dealer option))
& Shock sensors (dealer op- tion)
The shock sensors trigger the alarm
system when they sense impacts applied
to the vehicle and when any of their
electric wires is cut. The alarm system
causes the horn to sound and the turn
signal lights to flash for a short time when
the sensed impact is weak, but it warns of