engine SUBARU IMPREZA WRX STI 2011 Workshop Manual

Black plate (281,1)
北米Model "A1110BE-C" EDITED: 2010/ 12/ 17
not. Remote engine start transmitter pro-
gramming and feature programming can
be adjusted using the following procedure.
1. Open the driver ’s door (the driver ’s
door must remain opened throughout the
entire process).
2. Insert the key into the vehicle ’s ignition
switch and turn to the “ON”position.
3. Locate the small black programming
button behind the fuse box cover, on the
driver ’s side left under the dashboard
panel.
4. Press and hold the black programming
button for 10 to 15 seconds. The horn will
honk and the turn signal lights will flash
three times to indicate that the system has
entered programming mode. At this point
you can proceed to either step 5 or step 6.
5. To program a remote engine start
transmitter: press and release the “
”
button on each transmitter. The horn will
honk and the turn signal lights will flash
one time to indicate a successful trans-
mitter learn each time the “
”button is
pressed. You can program up to eight
transmitters.
6. To toggle the Horn Confirmation chirps
ON/OFF: depress and release the brake
pedal to toggle the feature. The horn will
chirp and the turn signal lights will flash
one time to indicate Confirmation Horn
Chirps are “OFF”. The horn will honk and the turn signal lights will flash 2 times to
indicate Confirmation Horn Chirps are
“ON
”. Depressing the brake pedal repeat-
edly will toggle the feature ON or OFF
each time.
7. To exit the remote engine start trans-
mitter and feature programming mode,
turn the ignition switch to the “LOCK”
position, remove the key from the ignition
switch and test operation of the remote
engine start transmitter(s) and horn con-
firmation feature.
& System maintenance! Changing the batteries
CAUTION
.Do not let dust, oil or water get on
or in the remote engine start
transmitter when replacing the
battery.
. Be careful not to damage the
printed circuit board in the re-
mote engine start transmitter
when replacing the battery.
. Be careful not to allow children to
touch the battery and any re-
moved parts; children could
swallow them.
. There is a danger of explosion if an incorrect replacement battery
is used. Replace only with the
same or equivalent type of bat-
tery.
. Batteries should not be exposed
to excessive heat such as sun-
shine, fire or the like.
The two 3-volt lithium batteries (model
CR-1220 ) supplied in your remote engine
start transmitter should last approximately
3 years, depending on usage. When the
batteries begin to weaken, you will notice
a decrease in range (distance from the
vehicle that your remote engine start
system operates). Follow the instructions
below to change the remote engine start
transmitter batteries.
Starting and operating
7-13
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7

Black plate (282,1)
北米Model "A1110BE-C" EDITED: 2010/ 12/ 17
7-14
Starting and operating
1. Carefully pry the remote engine start
transmitter halves apart using a small flat-
head screwdriver.
2. Remove the circuit board from the
bottom half of the case and slide the white
plastic battery holder out from under the
battery tab releasing the batteries. Re-
move the old batteries and replace with
new ones. Be sure to observe the (+) sign
on the old batteries before removing them
to ensure that the new batteries are
inserted properly (battery “+”should be
pointed away from the transmitter circuit
board on both batteries).
3. Carefully snap the case halves back
together, then test the remote engine start
system.
CAUTION
FCC WARNING
Changes or modifications not ex- pressly approved by the party re-
sponsible for compliance could void
the user
’s authority to operate the
equipment.
NOTEThis device complies with Part 15 of
the FCC Rules and RSS-Gen of IC
Rules. Operation is subject to the
following two conditions: (1) this de-
vice may not cause harmful interfer-
ence, and (2) this device must accept
any interference received, including
interference that may cause undesired
operation.

Black plate (283,1)
北米Model "A1110BE-C" EDITED: 2010/ 12/ 17
Manual transmission –6
speeds (STI)The manual transmission is a fully syn-
chromeshed, 6-forward-speed and 1-re-
verse-speed transmission.
The shift pattern is shown on the shift
lever knob.
WARNING
. Do not drive the vehicle with the
clutch disengaged (i.e., when the
clutch pedal is depressed) or
with the shift lever in the neutral
position. Engine braking has no
effect in either of these condi-
tions and the risk of an accident
is consequently increased.
. Do not engage the clutch (i.e.,
release the clutch pedal) sud-
denly when starting the vehicle.
By doing so the vehicle might
unexpectedly accelerate or the
transmission could malfunction.
& Selecting reverse gear1) SliderYou must raise the slider and hold it in that
position before you can move the shift
lever to the “R”position.
To change gears, fully depress the clutch
pedal, move the shift lever, and gradually
let up on the clutch.
If it is difficult to shift into gear, put the
transmission in neutral, release the clutch
pedal momentarily, and then try again.
CAUTION
Shift into reverse ONLY when the
vehicle has completely stopped. It
may cause damage to the transmis-
sion to try shifting into reverse when
Starting and operating
7-15
– CONTINUED –
7

Black plate (284,1)
北米Model "A1110BE-C" EDITED: 2010/ 12/ 17
7-16
Starting and operating
the vehicle is moving.& Shifting speeds! Recommended shifting speeds
The best compromise between fuel econ-
omy and vehicle performance during
normal driving is ensured by shifting up
at the speeds listed in the following table.
Shift up mph (km/h)
1st to 2nd 15 (24)
2nd to 3rd 25 (40)
3rd to 4th 40 (64)
4th to 5th 45 (72)
5th to 6th 50 (80)
!Maximum allowable speeds
The following table shows the maximum
speeds that are possible with each differ-
ent gear. The tachometer ’s needle will
enter the red area if these speeds are
exceeded.
With the exception of cases where sudden
acceleration is required, the vehicle
should not be driven with the tachometer ’s
needle inside the red area. Failure to
observe this precaution can lead to
excessive engine wear and poor fuel economy.
Gear
mph (km/h)
1st 31 (50)
2nd 50 (81)
3rd 74 (119)
4th 99 (159)
WARNING
When shifting down a gear, ensure
that the vehicle is not travelling at a
speed exceeding the Maximum Al-
lowable Speed for the gear which is
about to be selected. Failure to
observe this precaution can lead to
engine over-revving and this in turn
can result in engine damage.
In addition, sudden application of
engine brakes when the vehicle is
travelling on a slippery surface can
lead to wheel locking; as a conse-
quence, control of the vehicle may
be lost and the risk of an accident
increased.NOTENever exceed posted speed limits.
&Driving tipsDo not drive with your foot resting on the
clutch pedal and do not use the clutch to
hold your vehicle at a standstill on an
upgrade. Either of those actions may
cause clutch damage.
Do not drive with your hand resting on the
shift lever. This may cause wear on the
transmission components.
When it is necessary to reduce vehicle
speed due to slow traffic, turning corners,
or driving up steep hills, downshift to a
lower gear before the engine starts to
labor.
On steep downgrades, downshift the
transmission to 5th, 4th, 3rd or 2nd gear
as necessary; this helps to maintain a safe
speed and to extend brake pad life.
In this way, the engine provides a braking
effect. Remember, if you “ride”(over use)
the brakes while descending a hill, they
may overheat and not work properly.
The engine may, on rare occasions, knock
when the vehicle rapidly accelerates or
rapidly pulls away from a standstill. This
phenomenon does not indicate a malfunc-
tion.

Black plate (285,1)
北米Model "A1110BE-C" EDITED: 2010/ 12/ 17
Manual transmission –5
speeds (except STI)The manual transmission is a fully syn-
chromeshed, 5-forward-speed and 1-re-
verse-speed transmission.
The shift pattern is shown on the shift
lever knob. When shifting from 5th gear to
reverse gear, first return the shift lever to
the neutral position then shift into reverse
gear.
To change gears, fully depress the clutch
pedal, move the shift lever, and gradually
let up on the clutch pedal.
If it is difficult to shift into gear, put the
transmission in neutral, release the clutch
pedal momentarily, and then try again.
WARNING
. Do not drive the vehicle with the
clutch disengaged (i.e., when the
clutch pedal is depressed) or
with the shift lever in the neutral
position. Engine braking has no
effect in either of these condi-
tions and the risk of an accident
is consequently increased.
. Do not engage the clutch (i.e.,
release the clutch pedal) sud-
denly when starting the vehicle.
By doing so the vehicle might
unexpectedly accelerate or the
transmission could malfunction.
CAUTION
Shift into reverse ONLY when the
vehicle has completely stopped. It
may cause damage to the transmis-
sion to try shifting into reverse when
the vehicle is moving.
& Shifting speeds! Recommended shifting speeds
The best compromise between fuel econ-
omy and vehicle performance during
normal driving is ensured by shifting up
at the speeds listed in the following table.
Shift up mph (km/h)
1st to 2nd 15 (24)
2nd to 3rd 25 (40)
3rd to 4th 40 (64)
4th to 5th 45 (72)
!
Maximum allowable speeds
The following tables show the maximum
speeds that are possible with each differ-
ent gear.
Never exceed the speed limit listed in the
following table for each gear position
except for brief acceleration in an emer-
gency. The tachometer ’s needle will enter
the red area if these speeds are ex-
ceeded. Failure to observe this precaution
can lead to excessive engine wear and
poor fuel economy.
Starting and operating
7-17
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7

Black plate (286,1)
北米Model "A1110BE-C" EDITED: 2010/ 12/ 17
7-18
Starting and operating
Non-turbo models
mph (km/h)
1st 32 (51)
2nd 53 (86)
3rd 76 (122)
Turbo models mph (km/h)
1st 35 (56)
2nd 58 (94)
3rd 85 (137)
WARNING
When shifting down a gear, ensure
that the vehicle is not travelling at a
speed exceeding the Maximum Al-
lowable Speed for the gear which is
about to be selected. Failure to
observe this precaution can lead to
engine over-revving and this in turn
can result in engine damage.
In addition, sudden application of
engine brakes when the vehicle is
travelling on a slippery surface can
lead to wheel locking; as a conse-
quence, control of the vehicle may
be lost and the risk of an accident
increased.
NOTENever exceed the posted speed limit.&
Driving tipsDo not drive with your foot resting on the
clutch pedal and do not use the clutch to
hold your vehicle at a standstill on an
upgrade. Either of those actions may
cause clutch damage.
Do not drive with your hand resting on the
shift lever. This may cause wear on the
transmission components.
When it is necessary to reduce vehicle
speed due to slow traffic, turning corners,
or driving up steep hills, downshift to a
lower gear before the engine starts to
labor.
On steep downgrades, downshift the
transmission to 4th, 3rd or 2nd gear as
necessary; this helps to maintain a safe
speed and to extend brake pad life.
In this way, the engine provides a braking
effect. Remember, if you “ride”(over use)
the brakes while descending a hill, they
may overheat and not work properly.
The engine may, on rare occasions, knock
when the vehicle rapidly accelerates or
rapidly pulls away from a standstill. This
phenomenon is not an indication of a
problem in your vehicle.
Driver ’s Control Center Dif-
ferential (DCCD) (STI)
WARNING
Always use the utmost care when
driving. Being overconfident be-
cause you are driving a vehicle with
a driver ’s control center differential
could easily lead to a serious acci-
dent.
CAUTION
All the indicator lights will flash in
the event that the driver ’s control
center differential has a malfunc-
tion. Have the vehicle inspected by
your SUBARU dealer.
The driver ’s control center differential
allows you to freely change the degree
of limitation of the d ifferential action
(limited slip differential (LSD) torque) of
your vehicle’ s center differential.
By using the center differential control
switch, you can set an initial LSD torque to
match the road surface conditions, driving
conditions and your driving style.

Black plate (290,1)
北米Model "A1110BE-C" EDITED: 2010/ 12/ 17
7-22
Starting and operating
. When a temporary spare tire is
installed
. When your vehicle is towed
. When the vehicle is stopped
with the manual mode se-
lected
NOTE. A higher initial LSD torque setting
gives the vehicle greater traction when
driving straight ahead but makes cor-
nering more difficult. Remember this
when adjusting the initial LSD torque.
In general, higher initial LSD torque
settings assist driving on slippery
roads and lower settings for non-slip-
pery roads. When the vehicle is stuck
in snow or mud, setting the initial LSD
torque to the maximum will help to free
the vehicle.
. The setting of the initial LSD torque
will remain even when the auto mode is
selected or the ignition switch is turned
to the “OFF ”position. However, the
initial LSD torque will be minimized
when the battery is disconnected and
reconnected.
. During cornering or when making
turns (especially when going into the
garage), the rotational difference be-
tween the front and rear wheels may cause a braking effect accompanied by
vibration and noise. This does not
indicate a problem. The phenomenon
will disappear when setting the initial
LSD torque to the minimum.
In the auto mode, it controls the initial
LSD torque automatically. While in the
auto mode, this phenomenon some-
times occurs depending on the driving
condition, however, it does not indicate
a problem.
.
Use the center differential indicator
light only as a rough indication of the
initial LSD torque.
. If you operate the center differential
control switch while quickly accelerat-
ing or turning a tight corner, you may
feel slight shocks. This is due to
differential action by the center differ-
ential and does not indicate a problem.
& Temporary releaseWhen the driver stops the vehicle and
pulls the parking brake lever after manu-
ally setting the initial LSD torque, the LSD
torque is temporarily minimized. However
the indicator on the combination meter
continues to show the driver ’s selected
initial LSD torque. When the driver re-
leases the parking brake lever, the initial
LSD torque set by the driver is restored.
Automatic transmissionThe automatic transmission is electroni-
cally controlled and provides 4 forward
speeds and 1 reverse speed. Also, it has a
manual mode and a SPORT mode.
WARNING
Do not shift from the “P ” or “N ”
position into the “D ” or “R ” position
while depressing the accelerator
pedal. This may cause the vehicle
to jump forward or backward.
CAUTION
. Shift into the “P ” or “R ” position
only after the vehicle is comple-
tely stopped. Shifting while the
vehicle is moving may cause
damage to the transmission.
. Do not race the engine for more
than 5 seconds in any position
except the “N ” or “P ” position
when the brake is set or when
chocks are used in the wheels.
This may cause the automatic
transmission fluid to overheat.
. Avoid shifting from one of the
forward driving positions into the

Black plate (291,1)
北米Model "A1110BE-C" EDITED: 2010/ 12/ 17
“R ” position or vice versa until
the vehicle has completely
stopped. Such shifting may
cause damage to the transmis-
sion.
. When parking the vehicle, first
securely apply the parking brake
and then place the select lever in
the “P ” position. Avoid parking
for a long time with the select
lever in any other position as
doing so could result in a dead
battery.
NOTE. When the engine coolant tempera-
ture is still low, the automatic transmis-
sion will upshift to higher engine
speeds than when the coolant tempera-
ture is sufficiently high in order to
shorten the warm-up time and improve
driveability. The gearshift timing will
automatically shift to the normal timing
after the engine has warmed up.
. Immediately after ATF (automatic
transmission fluid) is replaced, you
may feel that the automatic transmis-
sion operation is somewhat unusual.
This results from invalidation of data
which the on-board computer has
collected and stored in memory to allow the transmission to shift at the
most appropriate times for the current
condition of your vehicle. Optimized
shifting will be restored as the vehicle
continues to be driven for a while.
&
Select lever
: Shifting is possible with the brake pedal
depressed.: Shifting is possible whether the brakepedal is depressed or not. However,
while the ignition switch is in the “LOCK ”
or “Acc ”position, shifting is not possible
if the brake pedal is not depressed.
Depress the brake pedal and move the
select lever.: Shifting is possible whether the brake pedal is depressed or not.
The select lever has four positions, “P”,
“R ”,“N ”, “D ”and also has manual gate for using
“SPORT ”mode or manual mode.
! P (Park)
This position is for parking the vehicle and
starting the engine.
In this position, the transmission is me-
chanically locked to prevent the vehicle
from rolling freely.
When you park the vehicle, first set the
parking brake fully, then shift into the “P ”
position. Do not hold the vehicle with only
the transmission.
To shift the select lever from the “P”to any
other position, you should depress the
brake pedal fully then move the select
lever. This prevents the vehicle from
lurching when it is started.
! R (Reverse)
This position is for backing the vehicle.
To shift from the “N”to “R”position, stop
the vehicle completely then move the
lever to the “R”position.
! N (Neutral)
This position is for restarting a stalled
engine.
In this position the wheels and transmis-
sion are not locked. In this position, the
transmission is neutral; the vehicle will roll
freely, even on the slightest incline unless
Starting and operating
7-23
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7

Black plate (292,1)
北米Model "A1110BE-C" EDITED: 2010/ 12/ 17
7-24
Starting and operating
the parking brake or foot brake is applied.
Avoid coasting with the transmission in
neutral.
During coasting, there is no engine brak-
ing effect.
WARNING
Do not drive the vehicle with the
select lever in the “N ” (neutral)
position. Engine braking has no
effect in this condition and the risk
of an accident is consequently in-
creased.NOTEIf the select lever is in the “N ” position
when you stop the engine for parking,
you may not subsequently be able to
move it to the “R ” or “P ” position. If
this happens, turn the ignition switch to
the “ON ”position. You will then be able
to move the select lever to the “P ”
position. For details, refer to “Shift lock
function” F7-24.
! D (Drive)
This position is for normal driving.
The transmission automatically shifts into
a suitable gear from 1st to 4th according to
the vehicle speed and the acceleration
you require. When more acceleration is required in this
position, depress the accelerator pedal
fully to the floor and hold that position. The
transmission will automatically downshift
to 3rd, 2nd or 1st gear. When you release
the pedal, the transmission will return to
the original gear position.
To use the
“SPORT”mode, move the lever
from this position into the manual gate. To
use the manual mode, move the lever
from this position into the manual gate
then move it toward the “+”and “”ends.
! While climbing a grade
When driving up a hill, undesired upshift to
4th gear is prevented from taking place
when the accelerator is released. This
minimizes the chance of subsequent
downshifting to a lower gear when accel-
erating again. This prevents repeated
upshifting and downshifting resulting in a
smoother operation of the vehicle.
NOTEThe transmission may downshift to 2nd
or 1st gear, depending on the way the
accelerator pedal is depressed to ac-
celerate the vehicle again.
! While going down a hill
When you are descending a hill or any
other slope while braking with the
“SPORT ”mode selected, the transmission may downshift to 3rd or 2nd gear depend-
ing on how hard you depress the brake
pedal, causing engine braking to work.
Reacceleration for a short time will cause
the transmission to upshift normally.
NOTE.
A 4th-to-3rd automatic downshift
will not occur at speeds above 50
mph (80 km/h) and a 3rd-to-2nd auto-
matic downshift will not occur at
speeds above 24 mph (38 km/h).
. Automatic downshifts to 3rd or 2nd
may occur even when driving on a level
road depending on conditions, such as
how hard you depress the brake pedal.& Shift lock functionThe shift lock function helps prevent the
improper operation of the select lever.
. The select lever cannot be operated
unless the ignition switch is turned to the
“ ON ”position and the brake pedal is
depressed.
. The select lever cannot be moved from
the “P ” position to any other position
before the brake pedal is depressed.
Depress the brake pedal first, and then
operate the select lever.
. Only the “P ”position allows you to turn
the key from the “Acc”position to the

Black plate (293,1)
北米Model "A1110BE-C" EDITED: 2010/ 12/ 17
“LOCK” position and remove the key from
the ignition key cylinder.
. If the ignition switch is turned to the
“LOCK” position while the select lever is in
the “N”position, the select lever may not
be moved to the “P”position after a period
of time. Therefore, move the select lever
to the “P”position with the brake pedal
depressed soon after the ignition switch is
turned to the “LOCK”position.
! Shift lock release
If the select lever cannot be operated, turn
the ignition switch back to the “ON ”
position then move the select lever to the
“ P ” position with the brake pedal de-
pressed.
If the select lever does not move after
performing the above procedure, perform
the following steps.
. When the select lever cannot be
shifted from “P ” to “N ”:
Refer to “Shift lock release using the shift
lock release button ”F 7-25.
. When the select lever cannot be
shifted from “N ” to “R ”, “P ”:
Within 60 seconds after placing the igni-
tion switch in the “Acc ”position, move the
select lever to the “R”or “P”position with
the brake pedal depressed. If you must perform the above procedure,
the shift lock system (or the vehicle control
system) may be malfunctioning. Contact a
SUBARU dealer for an inspection as soon
as possible.
If the select lever does not move after
performing the above procedure, refer to
“Shift lock release using the shift lock
release button
”F 7-25.
! Shift lock release using the shift
lock release button
Perform the following procedure to release
the shift lock.
1. Apply the parking brake and stop the
engine.
2. Remove the shift lock cover using a
flat-head screwdriver. The shift lock re-
lease button is located under the shift lock cover.
NOTETo prevent damage to the shift lock
cover, cover the tip of the flat-head
screwdriver with vinyl tape or a cloth
before removing the cover.3. While depressing the brake pedal,
insert a screwdriver into the hole, press
the shift lock release button using a
screwdriver, and then move the select
lever.
If the select lever does not move after
performing the above procedure, the shift
lock system may be malfunctioning. Con-
tact a SUBARU dealer for an inspection
as soon as possible.
Starting and operating
7-25
–
CONTINUED –
7