engine SUBARU IMPREZA WRX STI 2012 Owner's Manual

Black plate (121,1)
北米Model "A1130BE-A" EDITED: 2011/ 6/ 7
Ignition switch
WARNING
. Never turn the ignition switch to
“ LOCK” while the vehicle is
being driven or towed because
that will lock the steering wheel,
preventing steering control. And
when the engine is turned off, it
takes a much greater effort than
usual to steer.
. Before leaving the vehicle, al-
ways remove the key from the
ignition switch for safety and
never allow an unattended child
to remain in the vehicle. Failure
to follow this procedure could
result in injury to a child or
others. Children could operate
the power windows, the moon-
roof or other controls or even
make the vehicle move.
CAUTION
Do not attach a large key holder or
key case to either key. If it banged
against your knees or hands while
you are driving, it could turn the
ignition switch from the “ON ”posi- tion to the
“Acc ”or “LOCK ”posi-
tion, thereby stopping the engine.
Also, if the key is attached to a
keyholder or to a large bunch of
other keys, centrifugal force may act
on it as the vehicle moves, resulting
in unwanted turning of the ignition
switch.
The ignition switch has four positions:
LOCK, Acc, ON and START.NOTE. Keep the ignition switch in the
“ LOCK ”position when the engine is
not running.
. Using electrical accessories for a
long time with the ignition switch in the
“ ON ”or “Acc ”position can cause the battery to go dead.
.
If the ignition switch will not move
from the “LOCK ”position to the “Acc ”
position, turn the steering wheel
slightly to the left and right as you turn
the ignition switch.
& LOCKThe key can only be inserted or removed
in this position. The ignition switch will lock
the steering wheel when you remove the
key.
If turning the key is difficult, turn the
steering wheel slightly to the right and left
as you turn the key.The key can be turned from “Acc”to
“LOCK ”only when the key is pushed in
while turning it.
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Black plate (122,1)
北米Model "A1130BE-A" EDITED: 2011/ 6/ 7
3-4
Instruments and controls
& AccIn this position the electrical accessories
(audio, accessory power outlet, etc.) can
be used.&ONThis is the normal operating position after
the engine is started.&STARTThe engine is started in this position. The
starter cranks the engine to start it. When
the key is released (after the engine has
started), the key automatically returns to
the “ON ”position.
CAUTION
Do not turn the ignition switch to the
“START ”position while the engine
is running.
If your registered key fails to start the
engine, pull out the key once (the security
indicator light will blink), and then insert
the key in the ignition switch and turn it to
the “START ”position and again try to start
the engine.
NOTEThe engine may not start in the follow-
ing cases:. The key grip is touching another key
or a metallic key holder.. The key is near another key that contains an immobilizer transponder.
.
The key is near or touching another
transmitter.
& Key reminder chimeThe reminder chime sounds when the
driver ’s door is opened and the ignition
switch is in the “LOCK”or“Acc ”position.
The chime stops under the following
conditions.
. when the ignition switch is turned to the
“ON ”position
. when the key is removed from the
ignition switch
. when the driver ’s door is closed& Ignition switch lightFor easy access to the ignition switch in
the dark, the ignition switch light illumi-
nates when the driver ’s door is opened or
when the driver ’s door is unlocked using
the remote keyless entry transmitter.
The light remains illuminated for several
tens of seconds and then gradually turns
off under the following conditions.
. when the driver ’s door is closed
. when the doors are unlocked using the
remote keyless entry transmitter
The light turns off immediately under the

Black plate (127,1)
北米Model "A1130BE-A" EDITED: 2011/ 6/ 7
NOTEIf the connection between the combina-
tion meter and battery is broken for any
reason such as vehicle maintenance or
fuse replacement, the data recorded on
the trip meter will be lost.& TachometerThe tachometer shows the engine speed
in thousands of revolutions per minute.
CAUTION
Do not operate the engine with the
pointer of the tachometer in the red
zone. This may cause severe da-
mage to the engine.
&Fuel gauge1) Low fuel warning lightThe fuel gauge shows the approximate
amount of fuel remaining in the tank.
When the ignition switch is in the “LOCK”
or “Acc ”position, the fuel gauge shows “E”
even if the fuel tank contains fuel.
The gauge may move slightly during
braking, turning or acceleration due to fuel
level movement in the tank.
If you press the trip knob while the ignition
switch is in the “LOCK”or “Acc ”position,
the fuel gauge will light up and indicate the
amount of fuel remaining in the tank.
If, while the fuel gauge is indicating the
amount of fuel remaining in the tank, you
(a) do not press the trip knob for 10
seconds or (b) open and close the driver ’s door, the fuel gauge indication will turn off.
NOTEYou will see the
“
”sign in the fuel
gauge meter.
This indicates that the fuel filler door
(lid) is located on the right side of the
vehicle.
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Black plate (128,1)
北米Model "A1130BE-A" EDITED: 2011/ 6/ 7
3-10
Instruments and controls
& Temperature gauge1) Normal operating rangeThe temperature gauge shows engine
coolant temperature when the ignition
switch is in the “ON”position.
The coolant temperature will vary in
accordance with the outside temperature
and driving conditions.
We recommend that you drive moderately
until the pointer of the temperature gauge
reaches near the middle of the range.
Engine operation is optimum with the
engine coolant at this temperature range
and high revving operation when the
engine is not warmed up enough should
be avoided.
CAUTION
If the pointer exceeds the normal
operating range, safely stop the
vehicle as soon as possible.
Refer to “Engine overheating ”F9-
12.
REV indicator light and buz-
zer (STI)The REV alarm system issues a warning
using the REV indicator light (and a
buzzer if additionally selected) when the
engine speed reaches a level previously
set using the trip knob.
If you press the trip knob, the odometer/
trip meter will show the engine speed that
has already been set.

Black plate (129,1)
北米Model "A1130BE-A" EDITED: 2011/ 6/ 7
NOTEEven if the REV alarm system is not set,
the REV indicator light will illuminate
whenever the engine speed enters the
tachometer ’s red zone.& Setting the alarm-level en-
gine speed1. Push the trip knob to select “REV ”on
the combination meter.2. When the trip knob is pushed for more
than 2 seconds, the thousands place
flashes.
3. Release your finger from the trip knob
once, then push and hold the trip knob
again. The number will change sequen-
tially from 2 to 7. Release your finger at
the desired alarm-level engine speed.
4. When the trip knob is pushed, the
hundreds place flashes.
5. Release your finger from trip knob
once, then push and hold the trip knob
again. The number will change sequen-
tially from 0 to 9. Release your finger at
the desired alarm-level engine speed.
6. When the trip knob is pushed, the
buzzer sounds and the REV alarm system
will automatically enter its new setting
mode (step 7 below), in which you can
activate or deactivate the buzzer.

The alarm-level engine speed can be set
(in 100 rpm steps) within the range from
2,000 rpm to 7,000 rpm.
7. Every time that the trip knob is pushed
and held, the buzzer changes to activate
or deactivate.
b –on: Activated
b –off: Deactivated
When the mode is changed to “activate”,
the buzzer sounds.
8. Push the trip knob to complete the
setting procedure.NOTE. The REV alarm system does not
operate while settings are being en-
tered.
. The speed-setting mode terminates
if “--00 ”rpm is selected.
. The speed-setting mode is canceled
if the ignition switch is turned from ON
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Black plate (130,1)
北米Model "A1130BE-A" EDITED: 2011/ 6/ 7
3-12
Instruments and controls
to OFF, OFF to ON, or the vehicle starts
moving before the setting procedure is
finished.
. Setting the speed is impossible
when the vehicle is moving.
. The set engine speed may differ
from the engine speed shown by the
tachometer. Use the engine speed
shown by the tachometer as a rough
guide.
. If the setting operation is performed
with the engine switch turned off, the
REV indicator light turns off and the
setting operation is aborted when you
have stopped the setting operation for
approximately 10 seconds.
. If the setting operation is performed
with the engine switch turned off, the
REV indicator light turns off and the
setting operation is aborted when you
open and close the driver ’s door.& Deactivating the REV alarm
systemTo deactivate the REV indicator light and
buzzer functions of the REV alarm system,
set the thousands place of the alarm-level
engine speed to “–”.
Warning and indicator lightsSeveral of the warning and indicator lights
illuminate momentarily and then turn off
when the ignition switch is initially turned
to the “ON”position. This permits check-
ing the operation of the bulbs.
Apply the parking brake and turn the
ignition switch to the “ON”position. For
the system check, the following lights
illuminate and turn off after several sec-
onds or after the engine has started:: Seatbelt warning light (The seatbelt warning light turns off
only when the driver fastens the
seatbelt.): Front passenger ’s seatbelt warning
light
(The seatbelt warning light turns off
only when the front seat passenger
fastens the seatbelt.): SRS airbag system warning light
ON /
: Front passenger ’s frontal airbag
ON indicator light
/
: Front passenger ’s frontal airbag
OFF indicator light
: CHECK ENGINE warning light/Mal- function indicator light
: Charge warning light: Oil pressure warning light: Rear differential oil temperature warn-ing light (STI): Low tire pressure warning light (U.S.- spec. models)/
: ABS warning light
/
: Brake system warning light
: Low fuel warning light: Hill start assist warning light/Hill start assist OFF indicator light (STI): Door open warning light: Vehicle Dynamics Control warning light/Vehicle Dynamics Control opera-
tion indicator light: Vehicle Dynamics Control OFF indica-tor light/Traction Control OFF indicator
light (STI): Cruise control indicator light: Cruise control set indicator light: Shift-up indicator light (STI): REV indicator light (STI):Driver ’s control center differential
indicator and warning lights (STI)

Black plate (133,1)
北米Model "A1130BE-A" EDITED: 2011/ 6/ 7
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 turn
off 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 ad-
vanced frontal airbag system monitoring.
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 off.
If the front passenger ’s SRS frontal airbag
is deactivated, the passenger ’s frontal
airbag ON indicator will remain off while
the OFF indicator will illuminate.
With the ignition switch turned to the “ON”
position, if both the ON and OFF indica-
tors remain illuminated or off simulta-
neously even after the system check
period, the system is malfunctioning.
Contact your SUBARU dealer immedi-
ately for an inspection.
&
CHECK ENGINE warn-
ing light/Malfunction in-
dicator light
CAUTION
If the CHECK ENGINE light illumi-
nates while you are driving, have
your vehicle checked/repaired by
your SUBARU dealer as soon as
possible. Continued vehicle opera-
tion without having the emission
control system checked and re-
paired as necessary could cause
serious damage, which may not be
covered by your vehicle ’s warranty.
If this light illuminates steadily or blinks
while the engine is running, it may indicate
that there is a problem or potential
problem somewhere in the emission con-
trol system.
! If the light illuminates steadily
If the light illuminates steadily while driving
or does not turn off after the engine starts,
an emission control system malfunction
has been detected.
You should have your vehicle checked by
an authorized SUBARU dealer immedi-
ately.
NOTEThis light also illuminates when the fuel
filler cap is not tightened until it clicks.
If you have recently refueled your vehicle,
the cause of the CHECK ENGINE warning
light/malfunction indicator light illuminating
could be a loose or missing fuel filler cap.
Remove the cap and retighten it until it
clicks. Make sure nothing is interfering
with the sealing of the cap. Tightening the
cap will not make the CHECK ENGINE
warning light turn off immediately. It may
take several driving trips. If the light does
not turn off, take your vehicle to your
authorized SUBARU dealer immediately.
! If the light is blinking
If the light is blinking while driving, an
engine misfire condition has been de-
tected which may damage the emission
control system.
To prevent serious damage to the emis-
sion control system, you should do the
following.
. Reduce vehicle speed.
. Avoid hard acceleration.
. Avoid steep uphill grades.
. Reduce the amount of cargo, if possi-
ble.
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Black plate (134,1)
北米Model "A1130BE-A" EDITED: 2011/ 6/ 7
3-16
Instruments and controls
The CHECK ENGINE warning light may
stop blinking and illuminate steadily after
several driving trips. You should have your
vehicle checked by an authorized
SUBARU dealer immediately.&
Charge warning light
If this light illuminates when the engine is
running, it may indicate that the charging
system is not working properly.
If the light illuminates while driving or does
not turn off after the engine starts, stop the
engine at the first safe opportunity and
check the alternator belt. If the belt is
loose, broken or if the belt is in good
condition but the light remains illuminated,
contact your nearest SUBARU dealer
immediately.&
Oil pressure warning
light
If this light illuminates when the engine is
running, it may indicate that the engine oil
pressure is low and the lubricating system
is not working properly.
If the light illuminates while driving or does
not turn off after the engine starts, stop the
engine at the first safe opportunity and
check the engine oil level. If the oil level is
low, add oil immediately. If the engine oil is
at the proper level but the light remains illuminated, contact your nearest
SUBARU dealer immediately.
For details about checking the engine oil
level or adding the engine oil, refer to
“Engine oil
”F 11-8.
CAUTION
Do not operate the engine with the
oil pressure warning light illumi-
nated. This may cause serious en-
gine damage.&
Rear differential oil
temperature warning
light (STI)
CAUTION
Reduce vehicle speed and park the
vehicle in a safe place as soon as
possible if the R.DIFF TEMP light
illuminates. Continued driving with
this light illuminated can damage
the rear differential and other parts
of the powertrain.
If this light illuminates when the engine is
running, it may indicate that the rear
differential oil temperature is too hot.
At this time, the driver ’s control center
differential will automatically cancel the current torque-distribution ratio setting and
adopt its minimum ratio.
If the light illuminates while driving, reduce
vehicle speed and stop the vehicle at the
nearest safe place. Park the vehicle for
several minutes. After the light turns off,
you can start driving.
If the light does not turn off, contact the
nearest SUBARU dealer for service.
NOTE.
If the tire pressures are not correct
and/or the tires are not all the same
size and brand, the rear differential will
be heavily loaded when the vehicle is
driven, resulting in an abnormally high
oil temperature.
. The rear differential oil will deterio-
rate if its temperature increases en-
ough for the rear differential oil tem-
perature warning light to illuminate. It is
advisable to have the rear differential
oil replaced as soon as possible.&
Low tire pressure
warning light (U.S.-spec.
models)
When the ignition switch is turned to the
“ON ”position, the low tire pressure warn-
ing light will illuminate for approximately 2
seconds to check that the tire pressure

Black plate (136,1)
北米Model "A1130BE-A" EDITED: 2011/ 6/ 7
3-18
Instruments and controls
steadily after blinking for approxi-
mately one minute. This indicates
the TPMS is unable to monitor all
four road wheels. Contact your
SUBARU dealer as soon as possible
for tire and sensor replacement and/
or system resetting.
If the light illuminates steadily after
blinking for approximately one min-
ute, promptly contact a SUBARU
dealer to have the system inspected.
CAUTION
The tire pressure monitoring system
is NOT a substitute for manually
checking tire pressure. The tire
pressure should be checked peri-
odically (at least monthly) using a
tire gauge. After any change to tire
pressure(s), the tire pressure mon-
itoring system will not re-check tire
inflation pressures until the vehicle
is first driven more than 20 mph (32
km/h). After adjusting the tire pres-
sures, increase the vehicle speed to
at least 20 mph (32 km/h) to start the
TPMS re-checking of the tire infla-
tion pressures. If the tire pressures
are now above the severe low
pressure threshold, the low tire
pressure warning light should turn off a few minutes later. Therefore, be
sure to install the specified size for
the front and rear tires.
&
ABS warning light
CAUTION
.
If any of the following conditions
occur, we recommend that you
have the ABS system repaired at
the first available opportunity by
your SUBARU dealer.
– The warning light does not
illuminate when the ignition
switch is turned to the “ON ”
position.
– The warning light illuminates
when the ignition switch is
turned to the “ON ”position,
but it does not turn off even
when the vehicle speed ex-
ceeds approximately 8 mph
(12 km/h).
– The warning light illuminates
during driving.
. When the warning light is on (and
the brake system warning light is
off), the ABS function shuts
down. However, the conventional
brake system continues to oper- ate normally.
With a vehicle equipped with an EBD
system, the ABS warning light illuminates
together with the brake system warning
light if the EBD system malfunctions. For
further details of the EBD system mal-
function warning, refer to “Electronic
Brake Force Distribution (EBD) system
warning ”F 3-19.
NOTEIf the warning light behavior is as
described in the following conditions,
the ABS system may be considered
normal.
. The warning light illuminates right
after the engine is started but turns off
immediately, remaining off.
. The warning light remains illumi-
nated after the engine has been started,
but it turns off when the vehicle speed
reaches approximately 8 mph (12
km/h).
. The warning light illuminates during
driving, but it turns off immediately and
remains off.
When driving with an insufficient battery
voltage such as when the engine is jump
started, the ABS warning light may illumi-
nate. This is due to the low battery voltage
and does not indicate a malfunction.

Black plate (137,1)
北米Model "A1130BE-A" EDITED: 2011/ 6/ 7
When the battery becomes fully charged,
the light will turn off.&
Brake system
warning light
WARNING
. Driving with the brake system
warning light on is dangerous.
This indicates your brake system
may not be working properly. If
the light remains illuminated,
have the brakes inspected by a
SUBARU dealer immediately.
. If at all in doubt about whether
the brakes are operating prop-
erly, do not drive the vehicle.
Have your vehicle towed to the
nearest SUBARU dealer for re-
pair.
This light has the following functions.
! Parking brake warning
The light illuminates with the parking
brake applied while the ignition switch is
in the “ON”position. It turns off when the
parking brake is fully released.
! Brake fluid level warning
This light illuminates when the brake fluid
level has dropped to near the “MIN”level of the brake fluid reservoir with the ignition
switch in the
“ON”position and with the
parking brake fully released.
If the brake system warning light should
illuminate while driving (with the parking
brake fully released and with the ignition
switch positioned in “ON ”), it could be an
indication of leaking of brake fluid or worn
brake pads. If this occurs, immediately
stop the vehicle at the nearest safe place
and check the brake fluid level. If the fluid
level is below the “MIN ”mark in the
reservoir, do not drive the vehicle. Have
the vehicle towed to the nearest SUBARU
dealer for repair.
! Electronic Brake Force Distribution
(EBD) system warning
The brake system warning light also
illuminates if a malfunction occurs in the
EBD system. In that event, it illuminates
together with the ABS warning light.
The EBD system may be malfunctioning if
the brake system warning light and ABS
warning light illuminate simultaneously
during driving.
Even if the EBD system fails, the conven-
tional braking system will still function.
However, the rear wheels will be more
prone to locking when the brakes are
applied harder than usual and the vehi-
cle ’s motion may therefore become some- what harder to control.
If the brake system warning light and ABS
warning light illuminate simultaneously,
take the following steps.
1. Stop the vehicle in the nearest safe,
flat place.
2. Shut down the engine, apply the
parking brake and then restart it.
3. Release the parking brake. If both
warning lights turn off, the EBD system
may be malfunctioning. Drive carefully to
the nearest SUBARU dealer and have the
system inspected.
4. If both warning lights illuminate again
and remain illuminated after the engine
has been restarted, shut down the engine
again, apply the parking brake, and check
the brake fluid level.
5. If the brake fluid level is not below the
“MIN
”mark, the EBD system may be
malfunctioning. Drive carefully to the
nearest SUBARU dealer and have the
system inspected.
6. If the brake fluid level is below the
“MIN ”mark, DO NOT drive the vehicle.
Instead, have the vehicle towed to the
nearest SUBARU dealer for repair.
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