differential SUBARU IMPREZA WRX 2013 4.G Owners Manual

&Abbreviation list
You may find several abbreviations in this
manual. The meanings of the abbrevia-
tions are shown in the following list.
Abbreviation Meaning
A/C Air conditioner A/ELR Automatic/Emergency locking retractor
ABS Anti-lock brake system
AKI Anti knock index
ALR Automatic locking retractor
AT Automatic transmission
ATF Automatic transmission fluid
AWD All-wheel drive DCCD Driver
’s control center differ-
ential
DRL Daytime running lightEBD Electronic brake force distri- bution
ELR Emergency locking retractor
FWD Front-wheel drive
GAW Gross axle weight
GAWR Gross axle weight rating
GVW Gross vehicle weight
GVWR Gross vehicle weight rating
HID High intensity discharge Abbreviation Meaning
INT Intermittent
LATCH Lower anchors and tethers for
children
LED Light emitting diode
LSD Limited slip differential
MIL Malfunction indicator light MMT Methylcyclopentadienyl man-
ganese tricarbonyl
MT Manual transmission
OBD On-board diagnostics
RON Research octane number
SI-DRIVE SUBARU Intelligent Drive SRS Supplemental restraint sys- tem
TIN Tire identification number TPMS Tire pressure monitoring sys- tem Vehicle symbols
There are some of the symbols you may
see on your vehicle.
For warning and indicator lights, refer to “
Warning and indicator lights ”F 22.
Mark Name
WARNING
CAUTION
Power door lock
Power door unlock
Power window with automatic
open and close function
Passengers ’windows lock
and unlock
Fuel
Front fog lights 3
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22
&Warning and indicator lights
Mark Name Page
Seatbelt warning light 3-13
Front passenger ’s
seatbelt warning light 3-13
SRS airbag system
warning light3-14
/Front passenger
’s
frontal airbag ON indi- cator 3-14
/Front passenger
’s
frontal airbag OFF in- dicator 3-14
CHECK ENGINE
warning light/Malfunc-
tion indicator light3-15
Charge warning light 3-16
Oil pressure warning light
3-16
Rear differential oil
temperature warning
light (STI)3-16
ABS warning light 3-18 Mark Name Page
Brake system warning light
3-19
Door open warning light3-20
Hill start assist warn-
ing light/Hill start assist
OFF indicator light (STI)3-20
Vehicle Dynamics
Control warning light/
Vehicle Dynamics
Control operation indi-
cator light3-20
Vehicle Dynamics
Control OFF indicator
light/Traction Control
OFF indicator light (STI)3-21
Turn signal indicator lights
3-24
High beam indicator light3-24
Front fog light indicator
light (if equipped)
3-24
Security indicator light 3-23
Headlight indicator light
3-24Mark Name Page
Cruise control indica-
tor light
3-24
Cruise control set in-
dicator light3-24
Low fuel warning light 3-20
Low tire pressure
warning light
(U.S.-spec. models)3-16
Shift-up indicator light (STI)
3-23
Driver
’s control center
differential auto indi-
cator light (STI) 3-24
Auto [+] mode indica-
tor light (STI)
3-24
Auto [
] mode indica-
tor light (STI) 3-25
Driver
’s control center
differential indicator
and warning lights (STI) 3-25
REV indicator light (STI)
3-25
Sport (S) mode indi-
cator light (STI)3-23

Ignition switch..................................................... 3-3
LOCK .................................................................. 3-3
Acc..................................................................... 3-4
ON...................................................................... 3-4
START ................................................................ 3-4
Key reminder chime ............................................ 3-4
Ignition switch light ............................................. 3-4
Hazard warning flasher ....................................... 3-5
Meters and gauges. ............................................. 3-5
Combination meter illumination ........................... 3-5
Canceling the function for meter/gauge needle movement upon turning on the ignition switch ............................................................... 3-6
Meter/Gauge needle illumination setting (except STI) ................................................................... 3-6
Speedometer ....................................................... 3-7
Odometer/Trip meter ............................................ 3-7
Tachometer ......................................................... 3-9
Fuel gauge .......................................................... 3-9
Temperature gauge ............................................ 3-10
REV indicator light and buzzer (STI). ................ 3-10
Setting the alarm-level engine speed ................... 3-11
Deactivating the REV alarm system ..................... 3-12
Warning and indicator lights ............................. 3-12
Seatbelt warning light and chime ........................ 3-13
SRS airbag system warning light ........................ 3-14
Front passenger ’s frontal airbag ON and OFF
indicators ......................................................... 3-14
CHECK ENGINE warning light/Malfunction indicator light ................................................... 3-15 Charge warning light
.......................................... 3-16
Oil pressure warning light .................................. 3-16
Rear differential oil temperature warning light (STI) ................................................................ 3-16
Low tire pressure warning light (U.S.-spec. models) ........................................................... 3-16
ABS warning light .............................................. 3-18
Brake system warning light ................................ 3-19
Low fuel warning light ....................................... 3-20
Hill start assist warning light/Hill start assist OFF indicator light (STI) .......................................... 3-20
Door open warning light .................................... 3-20
Vehicle Dynamics Control warning light/Vehicle Dynamics Control operation indicator light .. ..... 3-20
Vehicle Dynamics Control OFF indicator light/ Traction Control OFF indicator light (STI)..... ..... 3-21
Security indicator light ....................................... 3-23
SI-DRIVE indicator light (STI) .............................. 3-23
Shift-up indicator light (STI) ............................... 3-23
Turn signal indicator lights ................................. 3-24
High beam indicator light ................................... 3-24
Cruise control indicator light .............................. 3-24
Cruise control set indicator light ........................ 3-24
Front fog light indicator light (if equipped) ..... ..... 3-24
Headlight indicator light ..................................... 3-24
Driver ’s control center differential auto indicator
light (STI) ........................................................ 3-24
Driver ’s control center differential indicator and
warning lights (STI) .......................................... 3-25
REV indicator light (STI) ..................................... 3-25
Clock .................................................................. 3-26Instruments and controls
3

3-12Instruments and controls
to OFF, OFF to ON, or the vehicle starts
moving before the setting procedure isfinished..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 roughguide.. 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 system
To 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 lights
Several 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 theseatbelt.)
: 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)

3-16Instruments 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
If the R.DIFF TEMP warning light
illuminates, reduce vehicle speed
and stop the vehicle in a safe
location as soon as possible. Con-
tinuing to drive with this light illumi-
nated may damage the rear differ-
ential and other parts of the power-train.
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 in the
nearest safe location. 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

3-24Instruments and controls
&Turn signal indicator lights
These lights show the operation of the turn
signal or lane change signal.
If the indicator lights do not blink or blink
rapidly, the turn signal bulb may be burned
out. Replace the bulb as soon as possible.
Refer to “Replacing bulbs ”F 11-39.
& High beam indicator light
This light shows that the headlights are in
the high beam mode.
This indicator light also illuminates when
the headlight flasher is operated. &Cruise control indica-
tor light
This light illuminates when the “CRUISE ”
main switch is pressed to activate the
cruise control function.
CAUTION
If the CHECK ENGINE warning light/
malfunction indicator light illumi-
nates, the cruise control indicator
light flashes at the same time. At
this time, avoid driving at high
speed and have your vehicle in- spected at a SUBARU dealer as
soon as possible.
NOTE
If you press the “CRUISE ”main switch
button while turning the ignition switch “ ON ”, the cruise control function is
deactivated and the cruise control
indicator light flashes. To reactivate
the cruise control function, turn the
ignition switch back to the “Acc ”or
“ LOCK ”position, and then turn it again
to the “ON ”position.
& Cruise control set in-
dicator light
This light illuminates when vehicle speed
has been set to use the cruise controlfunction. &Front fog light indicator
light (if equipped)
This indicator light illuminates while the
front fog lights are illuminated. & Headlight indicator light
This indicator light illuminates when the
headlight switch is placed in the “”or “
”
position.
& Driver ’s control center differ-
ential auto indicator light (STI)
This light functions while the ignition
switch is “ON ”. When illuminated, it
indicates that the driver ’s control center
differential is set to the auto mode. It turns
off when the driver ’s control center differ-
ential is set to the manual mode. For
details, refer to “Driver ’s Control Center
Differential (DCCD) (STI) ”F 7-18.
! Driver ’s control center dif-
ferential auto [+] indicatorlight
When 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 dif-
ferential auto [ ] indicator
light
When 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 lights
When 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 indicator light illuminates when the
engine speed reaches the level that was
previously set. This indicator light also
flashes when the tachometer needle en-
ters the red zone. For details, refer to “
REV indicator light and buzzer (STI) ”F 3-
10. Instruments and controls
3-25

Fuel...................................................................... 7-3
Fuel requirements ............................................... 7-3
Fuel filler lid and cap ........................................... 7-4
State emission testing (U.S. only) ...................... 7-7
Preparing to drive ............................................... 7-8
Starting the engine .............................................. 7-9
Stopping the engine ........................................... 7-10
Remote engine start system (dealer option) .............................................................. 7-10
Starting your vehicle .......................................... 7-10
Remote start safety features ............................... 7-11
Entering the vehicle while it is running via remote start ................................................................. 7-11
Entering the vehicle following remote engine start shutdown ......................................................... 7-11
Pre-heating or pre-cooling the interior of the vehicle ............................................................. 7-11
Service mode ..................................................... 7-11
Remote engine start transmitter programming and programmable feature option ..................... 7-12
System maintenance .......................................... 7-12
Manual transmission –6 speeds (STI) ............. 7-14
Selecting reverse gear ........................................ 7-15
Shifting speeds .................................................. 7-15
Driving tips ........................................................ 7-16
Manual transmission –5 speeds (except
STI) ................................................................... 7-16
Shifting speeds .................................................. 7-17
Driving tips ........................................................ 7-17 Driver
’s Control Center Differential (DCCD)
(STI) ................................................................. 7-18
To change mode of driver ’s control center
differential ....................................................... 7-18
Auto mode ........................................................ 7-19
Manual mode ..................................................... 7-20
Temporary release ............................................. 7-21
SI-DRIVE (STI) .................................................... 7-22
Intelligent (I) mode ............................................. 7-22
Sport (S) mode .................................................. 7-22
Sport Sharp (S#) mode. ...................................... 7-23
SI-DRIVE selector .............................................. 7-23
Limited slip differential (LSD) (STI) .................. 7-24
Power steering ................................................... 7-24
Braking ............................................................... 7-24
Braking tips ....................................................... 7-24
Brake system .................................................... 7-25
Disc brake pad wear warning indicators ............. 7-25
ABS (Anti-lock Brake System) .......................... 7-26
ABS system self-check ...................................... 7-26
ABS warning light .............................................. 7-26
Electronic Brake Force Distribution (EBD) system ............................................................. 7-26
Steps to take if EBD system malfunctions ..... ..... 7-27
Vehicle Dynamics Control system .................... 7-28
Vehicle Dynamics Control system monitor..... ..... 7-29
Vehicle Dynamics Control mode switch (STI) . ..... 7-29
Vehicle Dynamics Control OFF switch (except STI) ................................................................. 7-30 Starting and operating
7

7-18Starting 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 torque
The 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.
NOTE
If 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 aproblem. &
To change mode of driver ’s
control center differential
Press 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.

&Auto mode
In 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
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