2012 SUBARU IMPREZA WRX STI torque

23
22
Getting
Started Instrument
Panel Gauges
Personalize Controls While
OperatingSafety / In Case
of Emergency Additional
Information
22While OperatingVehicle Dynamics Control OFF Switch (Impreza WRX only)Pressing the switch to deactivate the Vehicle Dynamics Control system can help in the
following situations:
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TOPXMulti-Mode Vehicle Dynamics Control Switch
(Impreza WRX STI only)Traction Mode
Press the switch to enter traction mode. This mode restricts the functions of the Traction
Control System and Vehicle Dynamics Control system and thus delays utilizing their functions
as a reaction to vehicle behavior. This mode should be used in driving situations where the
vehicle dynamic performance will improve without decreasing engine torque control. The
indicator light in the gauge cluster will turn green.
Vehicle Dynamics Control OFF Mode
Press and hold the switch to enter Vehicle Dynamics Control Off mode. This mode should be
used in emergency situations, such as getting out of mud or deep snow. The indicator light in
the gauge cluster will turn yellow.
Fuel Filler Lid ReleaseTo open the fuel filler lid, pull the fuel filler lever up and release.
23
GetGttintigStartedInsItrument PanelGauGgesPerPsonalilizeConCtrotlslWhile OperatingSafSfetyt / /In ICasCe of EmergencyAddAdditiiional lInformation
While
Operating
REV Alarm System
(Impreza WRX STI only)The REV alarm system automatically issues a warning
using the REV indicator light whenever the tachometer
needle enters the red zone. The REV alarm level can
be set manually to an engine speed of your choosing
between 2,000 and 7,000 rpm using the trip knob.
The trip knob is also used to select a warning alarm
buzzer in addition to the light. The REV alarm set
level can be viewed in the odometer/tripmeter by
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and then pressing the trip knob. Please refer to our Owner’s Manual for more
detailed instructions on setting the engine speed alarm level and select\
ing the
warning buzzer.
6-Speed Manual Transmission
(Impreza WRX STI only)This manual transmission is a fully
synchromeshed 6 - forward and 1 - reverse
speed transmission. Before you can shift into
reverse gear, you must raise the slider ring
and hold it in that position. Only pull the slider
ring up when shifting into Reverse gear.

25
24
Getting
Started Instrument
Panel Gauges
Personalize Controls While
OperatingSafety / In Case
of Emergency Additional
Information
24
25
GetGttintigStartedInsItrument PanelGauGgesPerPsonalilizeConCtrotlslWhile OperatingSafSfetyt / /In ICasCe of EmergencyAddAdditiiional lInformation
While
Operating
Front Hood and Hood ScoopDue to the lightweight material, a slight vibration
is normal at higher speeds and will not affect the
durability of the hood. To avoid deforming the
front hood when closing, do not press down
on the hood with your hands. You can release
your hold on the front hood approximately
12 inches above the closing position and its
weight should cause it to close securely.

Driver Control Center
Differential (DCCD)
(Impreza WRX STI only)This system adjusts the torque-distribution
ratio between the front and rear wheels
of the center differential to suit driving and
road surface conditions. The DCCD can be
operated automatically or manually. When
the system is in the automatic mode, the
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switch located on the center console. Use the DCCD
control switch located beside the parking brake lever for
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make a vibration or noise when the vehicle is in
tight turns at slow speeds (torque binding). In addition, if the rear differential oil
exceeds a certain temperature, the DCCD will automatically cancel the current
torque-distribution ratio setting and adopt its minimum ratio.

Front Fender VentsThe front fender has functional side vents that increase
air flow through the engine compartment. This provides
additional cooling for the intercooler and engine.

Limited Slip Differential
(Impreza WRX STI only)The Limited Slip Differential (LSD) provides optimum distribution of power according to
the difference in revolution between the right and left rear wheels that may be caused
by certain driving conditions, thereby improving driving stability on snow-covered,
muddy or other slippery roads or during high speed driving. Due to the nature of this
mechanical Limited Slip Differential, the rear differential gears may make a vibration
and/or noise when making turns. When servicing the LSD, use only specified gear oil.
TiresThe factory-fitted tires on your vehicle are summer
tires. Summer tires are high-speed capability tires
best suited for highway driving under dry conditions.
Summer tires are inadequate for driving on slippery
roads, such as on snow-covered or icy roads. If you drive your vehicle on
snow-covered or icy roads, we
strongly recommend the use
of winter (snow) tires for all four
wheels. Please note that these
originally equipped summer
tires offer advanced grip
performance and will wear out
quicker than ordinary tires.
WRX STI
WRX

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 (143,1)
北米Model "A1130BE-A" EDITED: 2011/ 6/ 7
! Driver ’s control center dif-
ferential auto [ ] indicator
lightWhen the AUTO [ ] mode is set, the
AUTO [ ] indicator light illuminates.
For details, refer to “Driver ’sControl
Center Differential (DCCD) (STI) ”F 7-18.& Driver ’s control center differ-
ential indicator and warning
lights (STI)! Indicator lightsWhen you select the manual mode of the
driver ’s control center differential, the
initial limited slip differential (LSD) torque
that is currently selected for the center
differential is indicated by the illumination
of these indicator lights. !
Warning light
All the indicator lights will flash in the event
that the driver ’s control center differential
has a malfunction. Have the vehicle
inspected by your SUBARU dealer. For
details, refer to “Driver’s Control Center
Differential (DCCD) (STI) ”F 7-18.&
REV indicator light
(STI)
This light illuminates when the engine
speed reaches a level set by driver or
when the tachometer needle enters the
red zone.
ClockThe time changes by 1 minute each time
the “+”button or “”button is pressed.
Pressing the “+”button moves the dis-
played time forward, while pressing the “”
button moves the displayed time back.
Pressing and holding either button
changes the displayed time continuously.
Instruments and controls
3-25
– CONTINUED –
3

Black plate (268,1)
北米Model "A1130BE-A" EDITED: 2011/ 6/ 7
7-18
Starting and operating
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 differential 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.
1) LSD torque
2) Traction torque
3) Initial LSD torque (maximum)
4) Initial LSD torque (minimum)
A) Initial LSD torque (adjustable)
B) Mechanical LSD torqueThe driver ’s control center differential has
an auto mode and a manual mode. In the
auto mode, the system automatically
adjusts the initial LSD torque. In the
manual mode, you can change to the
desired mode manually by using the
center differential control switch.NOTEIf you rapidly depress and release the
accelerator pedal while driving at low
speed, you may hear a knocking sound
from the vicinity of the center differen- tial and rear differential. This sound
occurs because of the structure of the
center differential. It does not indicate a
problem.
&
To change mode of driver ’s
control center differentialPress the “AUTO-MANU ”switch on the
center console to switch from auto mode
to manual mode or vice versa. When you
select the auto mode, the “AUTO”indica-
tor light illuminates. When you select the
manual mode, the “AUTO”indicator light
turns off.

Black plate (269,1)
北米Model "A1130BE-A" EDITED: 2011/ 6/ 7
& Auto modeIn the auto mode, the system estimates
the driving and road conditions using
signals from the wheel speed sensor,
throttle position sensor, steering angle
sensor and brake switch, etc. According
to the result, it electronically and auto-
matically controls the degree of limitation
of the differential action (LSD torque) to
optimize the differential action of the
center differential. When the ignition
switch is turned ON, the “AUTO”indicator
light on the combination meter illuminates. The auto mode has 3 modes as follows.
Mode
Operation
AUTO [+] This mode emphasizes traction control and strengthens the
limitation of differential action
that is suitable for driving on
slippery roads for vehicle stabi-
lity.
AUTO This mode is suitable for most driving situations.
AUTO [] This mode is suitable when you seek quick response from the
steering wheel and smooth
driving.
!Mode setting method
In most situations, it is recommended that
the “AUTO ”mode is selected.Push the control switch forward to select the
“AUTO [+] ”mode. After setting the
mode, “
”on the combination meter
illuminates.
Pull the control switch rearward to select
the “AUTO [ ]” mode. After setting the
mode, “
”on the combination meter
illuminates.
When the “AUTO [+]”mode is selected,
pull the control switch rearward to change
to the “AUTO”mode. When the “AUTO
[ ]” mode is set, push the control switch
forward to change to the “AUTO”mode.
Starting and operating
7-19
– CONTINUED –
7

Black plate (270,1)
北米Model "A1130BE-A" EDITED: 2011/ 6/ 7
7-20
Starting and operating
& Manual modeIn the manual mode, you can use the
center differential control switch to adjust
the initial LSD torque as desired. When
this mode is selected, the “AUTO ”indica-
tor light on the combination meter turns
off. !
Center differential control switch
and indicator light
The control switch is located beside the
parking brake lever. By pushing the
control switch forward or pulling it rear-
ward, it is possible to change the initial
LSD torque.
The center differential indicator lights on
the combination meter give six levels of
indication. The indicator lights and control
switch are linked; when the switch is
pushed or pulled to change the initial
LSD torque, the illumination position of the
indicator lights changes accordingly.
Push the switch forward to increase the
initial LSD torque; when the “LOCK ”
indicator light illuminates, the initial LSD
torque setting is maximum. The center
differential will then be almost completely
locked.

Black plate (271,1)
北米Model "A1130BE-A" EDITED: 2011/ 6/ 7
Pull the switch rearward to reduce the
initial LSD torque. When the lowest posi-
tion of the driver ’s control center differen-
tial indicator light illuminates, the initial
LSD torque will be minimum. Under this
condition, only the Mechanical LSD torque
will limit the differential action.
CAUTION
. Do not operate the control switch
when a wheel slippage occurs.
Wait until the wheelspin has been
brought under control.
. Under any of the following con-
ditions after setting to the man-
ual mode, pull the center differ-
ential control switch to minimize
the initial LSD torque: .
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 “LOCK ”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.
Starting and operating
7-21
7