2011 SUBARU IMPREZA WRX automatic transmission

11-22Maintenance and service
Automatic transmission fluid &Checking the fluid level
The automatic transmission fluid expands
largely as its temperature rises; the fluid
level differs according to fluid temperature.
Therefore, there are two different scales
for checking the level of hot fluid and cold
fluid on the level gauge.
Though the fluid level can be checked
without warming up the fluid on the“ COLD ”range, it is recommended to
check the fluid level when the fluid is at
operating temperature. ! Checking the fluid level when the
fluid is hot
1. Drive the vehicle several miles to raise
the temperature of the transmission fluid
up to normal operating temperature; 158
to 176 8F (70 to 80 8C) is normal.
2. Park the vehicle on a level surface and
set the parking brake.
3. First shift the select lever in each
position. Then shift it in the “P ” position,
and run the engine at idling speed.
1) Yellow handle
1) HOT range
2) COLD range
3) Upper level
4) Lower level
4. Pull out the level gauge and check the fluid level on the gauge. If it is below the
lower level on the
“HOT ”range, add the
recommended automatic transmission
fluid up to the upper level. ! Checking the fluid level when the
fluid is cold
When the fluid level has to be checked
without time to warm up the automatic
transmission, check to see that the fluid
level is between the lower level and upper
level on the “COLD ”range. If it is below
that range, add fluid up to the upper level.
Be careful not to overfill.
CAUTION
Be careful not to spill automatic
transmission fluid when adding it.
If automatic transmission fluid
touches the exhaust pipe, it may
cause a bad smell, smoke, and/or a
fire. If automatic transmission fluid
gets on the exhaust pipe, be sure to
wipe it off.

&Recommended fluid
Refer to “Fluids ”F 12-9.
NOTE
For optimum transmission perfor-
mance, only use the automatic trans-
mission fluid that is recommended and
provided by SUBARU.
If the recommended automatic trans-
mission fluid is unavailable, Dexron III
may be temporarily used. If the Dexron
III is used continuously there will be a
noticeable increase in the vibration and
noise from the automatic transmission. Front differential gear oil (AT models) &
Checking the oil level
1) Yellow handle
1. Park the vehicle on a level surface and
stop the engine.
2. Pull out the level gauge, wipe it clean,
and insert it again.
1) Upper level
2) Lower level
3. Pull out the level gauge again and
check the oil level on it. If it is below the
lower level, add oil to bring the level up to
the upper level.
CAUTION
Be careful not to spill front differ-
ential gear oil when adding it. If oil
touches the exhaust pipe, it may
cause a bad smell, smoke, and/or a
fire. If oil gets on the exhaust pipe,
be sure to wipe it off. Maintenance and service
11-23
– CONTINUED –

&Engine
Engine model EJ253
(2.5 L, SOHC, non-turbo) EJ255
(2.5 L, DOHC, turbo, except STI) EJ257
(2.5 L, DOHC, turbo, STI)
Engine type Horizontally opposed, liquid cooled 4 cylinder, 4-stroke gasoline engine
Displacement cc (cu-in) 2,457 (150)
Bore 6Stroke in (mm) 3.963.1 (99.5 679.0)
Compression ratio 10.0 : 1 8.4 : 1 8.2 : 1
Firing order 1
–3 –2–4
& Electrical system
Battery type and capacity (5HR) MT 12V-48AH (55D23L)
AT 12V-52AH (65D23L)
Alternator Non-turbo models 12V-90A
Turbo models 12V-110A
Spark plugs Non-turbo models FR5AP-11 (NGK)
Turbo models SILFR6A (NGK)
AT: Automatic transmission
MT: Manual transmission Specifications
12-3
– CONTINUED –

&Fluids
NOTE
Each quantity indicated here is only a guideline. The necessary quantity for replacement may differ slightly depending on the
temperature and other factors.
Fluid Fluid type Fluid capacity
Automatic transmission fluid (AT models) · SUBARU ATF
· IDEMITSU ATF HP 9.8 US qt (9.3 liters, 8.2 Imp qt)
Power steering fluid · SUBARU ATF·
“Dexron III ”Type Automatic Transmission Fluid 0.7 US qt (0.7 liter, 0.6 Imp qt)
Brake fluid · Genuine SUBARU brake fluid
· FMVSS No. 116, fresh DOT 3 or DOT 4 brake fluid –
Clutch fluid (MT models) –
For the checking procedures or other details, refer to “Automatic transmission fluid ”F 11-22, “Power steering fluid ”F 11-24, “Brake fluid ”F 11-25 or
“ Clutch fluid (MT models) ”F 11-26. Specifications
12-9
– CONTINUED –

12-12Specifications
Fuses and circuits &Fuse panel located in the passenger compartmentFuse
panel Fuse
rating Circuit
1 Empty
2 Empty
3 15A .Door locking
4 10A .Front wiper deicer relay
5 10A .Combination meter
. Clock
6 7.5A .Remote control rear
view mirrors
. Seat heater relay
7 15A .Combination meter
. Integrated unit
8 20A .Stop light
9 15A .Front wiper deicer
10 7.5A .Power supply (battery)
11 7.5A .Turn signal unit
12 15A .Automatic transmission
unit
. Engine control unit
. Integrated unit
13 20A .Accessory power outlet
(center console)
14 15A .Position light
. Tail light
. Rear combination light
15 Empty (FWD connector for
AWD AT models)

12-14Specifications
&Fuse panel located in the engine compartment
A) Main fuse Fuse
panel Fuse
rating Circuit
1 30A .ABS unit
. Vehicle Dynamics Con-
trol unit
2 25A .Main fan (cooling fan)
3 10A .Secondary air combina-
tion valve (turbo models)
4 25A .Sub fan (cooling fan)
5 Empty
6 10A .Audio
7 30A .Headlight (low beam)
8 15A .Headlight (high beam)
9 20A .Back-up
10 15A .Horn
11 25A .Rear window defogger
. Mirror heater
12 15A .Fuel pump
13 10A .Automatic transmission
control unit
14 7.5A .Engine control unit
15 15A .Turn and hazard warn-
ing flasher
16 15A .Tail and illumination re-
lay
17 7.5A .Alternator

14-2Index
A
ABS (Anti-lock Brake System) ..................................... 7-32
Warning light ......................................................... 3-21
Accessories ....................................................... 5-4, 11-46
Accessory power outlet ................................................. 6-8
Active head restraint ..................................................... 1-5
Air cleaner element ................................................... 11-17
Air conditioner Automatic climate control system ............................. 4-11
Manual climate control system ............................. 4-4, 4-7
Air filtration system ..................................................... 4-13
Airflow selection Automatic climate control system ......................... 4-2, 4-9
Manual climate control system ............................. 4-2, 4-4
Alarm system ............................................................ 2-16
All-Wheel Drive warning light ....................................... 3-23
Aluminum wheel ....................................................... 11-38
Cleaning ............................................................... 10-3
Antenna system ........................................................... 5-3
Anti-lock Brake System (ABS) ..................................... 7-32
Arming the system ..................................................... 2-17
Armrest ....................................................................... 1-8
Ashtray ..................................................................... 6-10
AT OIL TEMP warning light ......................................... 3-18
Audio Antenna system ....................................................... 5-3
Auxiliary input jack ................................................. 5-34
Bluetooth
®audio .................................................... 5-45
CD player operation ............................................... 5-23
Control button ........................................................ 5-42
FM/AM radio operation ........................................... 5-12 iPod
®operations
.................................................... 5-37
Power and sound controls ........................................ 5-8
Satellite radio operations ......................................... 5-17
Set ........................................................................ 5-4
USB storage device operations ................................ 5-37
Auto-dimming mirror/compass .............................. 3-40, 3-41
Automatic climate control system ................................... 4-8
Automatic transmission ............................................... 7-22
Fluid ........................................................... 11-22, 12-9
MANUAL mode ...................................................... 7-26
Oil temperature warning light (AT OIL TEMP) ............. 3-18
Select lever ........................................................... 7-23
Shift lock function ................................................... 7-24
SPORT mode ........................................................ 7-28
Automatic/Emergency Locking Retractor (A/ELR) ........... 1-12
Auxiliary input jack ...................................................... 5-34
BBattery .................................................................... 11-44
Drainage prevention function ..................................... 2-5
Jump starting ......................................................... 9-11
Replacement (remote engine start transmitter) ........... 7-13
Replacement (remote keyless entry system) .............. 2-11
Bluetooth
®audio ........................................................ 5-45
Booster seat .............................................................. 1-27
Bottle holder ............................................................... 6-7
Brake
Assist .................................................................... 7-32
Booster ....................................................... 7-31, 11-27
Fluid ........................................................... 11-25, 12-9
Pad and lining ...................................................... 11-30

Parking........................................................ 7-40, 11-31
Pedal .................................................................. 11-28
System ................................................................. 7-31
Brake pedal Free play ............................................................. 11-28
Reserve distance .................................................. 11-28
Brake system ............................................................ 7-31
Warning light ......................................................... 3-21
Braking ..................................................................... 7-31
Tips...................................................................... 7-31
Breaking-in of new brake pads and linings ................... 11-30
Bulb Chart .................................................................. 12-16
Replacing ............................................................. 11-47
C
Cargo area Cover ................................................................... 6-12
Light ............................................................. 6-2, 11-54
Tie-down hooks ..................................................... 6-13
Catalytic converter ....................................................... 8-3
Center Console .................................................................. 6-5
Ventilators ............................................................... 4-3
Center and side ventilators ............................................ 4-3
Changing
Coolant ................................................................ 11-15
Flat tire ................................................................... 9-6
Oil and oil filter ..................................................... 11-11
Charge warning light .................................................. 3-18 CHECK ENGINE warning light/Malfunction indicator
lamp ...................................................................... 3-16
Checking
Brake pedal free play ............................................ 11-28
Brake pedal reserve distance ................................. 11-28
Clutch function ..................................................... 11-29
Clutch pedal free play ........................................... 11-29
Coolant level ........................................................ 11-14
Fluid level (automatic transmission fluid) .................. 11-22
Fluid level (brake fluid) .......................................... 11-25
Fluid level (clutch fluid) .......................................... 11-26
Fluid level (power steering fluid) .. ........................... 11-24
Fluid level (washer fluid) ........................................ 11-38
Oil level (engine oil) .............................................. 11-10
Oil level (front differential gear oil) .......................... 11-23
Oil level (manual transmission oil) .......................... 11-21
Child restraint systems ................................................ 1-21
Installation of a booster seat .................................... 1-27
Installation with A/ELR seatbelt ... ............................. 1-24
Lower and tether anchorages ................................... 1-29
Top tether anchorages ............................................ 1-31
Child safety ................................................................... 5
Locks .................................................................... 2-21
Chime Key........................................................................ 3-5Light ..................................................................... 3-31
Seatbelt. ................................................................ 3-14
Cleaning Aluminum wheels ................................................... 10-3
Interior .................................................................. 10-5
Ventilation grille ...................................................... 4-12 Index
14-3