2006 SUBARU IMPREZA cooling

4
Climate control
Ventilator ............................................................. 4-2
Air flow selection ................................ .................... 4-2
Center and side ventilators ....................... ............. 4-3
Manual climate control system (if equipped) ..................................... ............... 4-3
Control panel ..................................... ..................... 4-3
Heater operation .................................. ................... 4-5
Air conditioner operation (if equipped) ........... ..... 4-7
Automatic climate control system (if equipped) ..................................... ............... 4-7
Control panel ..................................... ..................... 4-8
To use as full-automatic climate control
system ............................................ ....................... 4-8
To use as semi-automatic climate control system ............................................ ....................... 4-8
Fan speed control dial ............................ ............... 4-8
Temperature control dial .......................... .............. 4-9
Air flow control dial ............................. ................... 4-9
Air inlet selection button ........................ ................ 4-9
Air conditioner button ............................ ................ 4-10
Temperature sensors ............................... .............. 4-10
Operating tips for heater and air conditioner ....................................... ............... 4-11
Cleaning ventilation grille ....................... ............... 4-11
Efficient cooling after parking in direct sunlight .......................................... ....................... 4-11
Lubrication oil circulation in the refrigerant
circuit ........................................... ......................... 4-11Checking air conditioning system before
summer season ..................................... ............... 4-11
Cooling and dehumidifying in high humidity and
low temperature weather conditions ................ .. 4-11
Air conditioner compressor shut-off when engine is heavily loaded .......................... ............ 4-12
Refrigerant for your climate control system ....... . 4-12
Air filtration system ............................. ............... 4-12
Replacing an air filter ........................... .................. 4-12

4-4 Climate control
Fan speed control dial
The fan operates only when the ignition
switch is turned to the “ON ” position. The
fan speed control dial is used to select four
fan speeds.
Air flow control dial
This dial has the following five positions:
: Air flows through the instrument pan-
el outlets.
: Air flows through the instrument pan-
el outlets and the foot outlets.
: Air flows through the foot outlets and
some through the windshield defroster
outlets.
: Air flows through the windshield de-
froster outlets and foot outlets.
: Air flows through the windshield de-
froster outlets.
NOTE
You will find the notation “USE
WITH ” on the air flow control
dial plate.
This is intended to remind you to set
the air inlet selection lever in the “ ”
position when defogging the
windshield.
Defogging with the air inlet selection
lever set in the “ ” position pro-
vides better defogging performance
than in the “ ” position.
When the dial is placed in the “ ”
or “ ” position, the air conditioner
compressor operates automatically re-
gardless of the position of the air con-
ditioner button to defog the windshield
quickly.
However the indicator on the air condi-
tioner button will not come on.
Also, you cannot stop the air condi-
tioner compressor by pressing the air
conditioner button.
Air conditioner button (if equipped) The air conditioner operates only when
the engine is running.
Push the air conditioner button while the
fan is in operation to turn on the air condi-
tioner. The indicator light will come on.
Push it again to turn off the air conditioner.
Air inlet selection lever
(Recirculation): Interior air is recir-
culated inside the vehicle.
Place the air inlet selection lever in the
“ ” position for fast cooling with the
air conditioner or when driving on a dusty
road.
(Outside air): Outside air is drawn
into the passenger compartment.
Place the air inlet selection lever in the
“ ” position when the interior has
cooled to a comfortable temperature and
the road is no longer dusty.
400288
Continued operation in the
“ ” position may fog up the
windows. Switch to the “ ”
position as soon as the outside
dusty condition clears.

Climate control 4-7
– CONTINUED –
Air conditioner operation (if
equipped)
Cooling or dehumidifying
For cooling and dehumidification of the
passenger compartment, performing the
following steps will allow air to flow
through the instrument panel outlets:
1. Set the air inlet selection lever to the
“ ” position.
2. Set the air flow control dial to the “ ”
position.
3. Set the air conditioner button to the“ ON ” position.
4. Set the temperature control dial to the
blue side.
5. Set the fan speed control dial at the
highest speed.
Defrosting or defogging
To direct warm air to the windshield and
front door windows:
1. Set the air inlet selection lever to the
“ ” position.
2. Set the air flow control dial to the
“ ” position.
3. Set the temperature control dial to the
red side.
4. Set the fan speed control dial at the
highest speed.
The air conditioner compressor automati-
cally operates when the air flow control
dial set in the “ ” or “ ” position to
provide better defogging performance.
However, the air conditioner indicator light
does not come on at this time.Automatic climate control
system (if equipped)
Although this climate control system can
be used as a full-automatic climate control
system, it can also, if desired, be used as
a semi-automatic climate control system.
When it is used as a full-automatic climate
control system, the outlet air temperature,
fan speed, air flow distribution, air inlet
control, and air conditioner compressor
operation are all automatically controlled
to maintain a constant, comfortable tem-
perature inside the vehicle.
NOTE
Operate the automatic climate con-
trol system when the engine is run-
ning.
When the engine coolant is cold, the
blower does not run.
In the “AUTO ” mode, when the air
temperature in the passenger compart-
ment is sufficiently cool, the air condi-
tioner compressor does not operate.
For efficient defogging or dehumidify-
ing in cold weather, press the “A/C ”
button to operate the air conditioner
compressor.
Even when cooling is not necessary,
setting the temperature much lower
than the current outlet air temperature
400373
400368

Climate control 4-9
– CONTINUED –
AUTO position and the air flow control
dial in the
“ ”, “ ” , or “ ” po-
sition, the fan does not operate during
engine warmup until the engine cool-
ant temperature exceeds approx. 122 F
(50 C).
Temperature control dial
This dial is used to set the desired interior
temperature. With the dial set to your de-
sired temperature, the system automati-
cally adjusts the temperature of air sup-
plied from the outlets such that the desired
temperature is achieved and maintained.
If the dial is turned fully counterclockwise,
the system gives maximum cooling perfor-
mance. If the dial is turned fully clockwise,
the system gives maximum heating per- formance.
Air flow control dial
This dial has the following six positions.
The outlets from which air is supplied in
each position are as follows:
AUTO:
The air flow control is adjusted au-
tomatically in accordance with the air tem-
perature inside and outside the passenger
compartment, the intensity of sunlight,
and other factors. SUBARU recommends
using the AUTO position.
: Instrument panel outlets: Instrument panel outlets and foot out-
lets
: Foot outlets and windshield defroster
outlets (relatively little air from windshield defroster outlets)
: Windshield defroster outlets and foot
outlets
: Windshield defroster outlets
NOTE
When the dial is placed in the “ ”
or “ ” position, the air conditioner
compressor operates automatically to
defog the windshield quickly. At the
same time, the air inlet selection is au-
tomatically set to “outside air ” mode.
Air inlet selection button
ON position (Recirculation): Interior air
is recirculated inside the vehicle. Push the
air inlet selection button to the ON position
for fast cooling with the air conditioner or
400600
400380
400381

Climate control 4-11
– CONTINUED –
–
Do not subject the sensors to impact.
– Keep water away from the sensors.
– Do not cover the sensors.
The sensors are located as follows: – Solar sensor: beside windshield de-
froster grille – Interior air temperature sensor: beside
the fan speed control dial– Outside temperature sensor: behind
front grille.
Operating tips for heater and
air conditioner
Cleaning ventilation grille
Always keep the front ventilation inlet
grille free of snow, leaves, or other ob-
structions to ensure efficient heating and
defrosting. Since the condenser is located
in front of the radiator, this area should be
kept clean because cooling performance
is impaired by any accumulation of insects
and leaves on the condenser.
Efficient cooling after parking
in direct sunlight
After parking in direct sunlight, drive with
the windows open for a few minutes to al- low outside air to circulate into the heated
interior. This results in quicker cooling by
the air conditioner. Keep the windows
closed during the operation of the air con-
ditioner for maximum cooling efficiency.
Lubrication oil circulation in
the refrigerant circuit
Operate the air conditioner compressor at
a low engine speed (at idle or low driving
speeds) a few minutes each month during
the off-season to circulate its oil.
Checking air conditioning
system before summer sea-
son
Check the air conditioner unit for refriger-
ant leaks, hose conditions, and proper op-
eration each spring. This check is best
performed by your SUBARU dealer.
Cooling and dehumidifying in
high humidity and low tem-
perature weather conditions
Under certain weather conditions (high
relative humidity, low temperatures, etc.)
a small amount of water vapor emission
from the air outlets may be noticed. This
condition is normal and does not indicate
400603

In case of emergency 9-9
– CONTINUED –
Jump starting
When your vehicle does not start due to a
run down (discharged) battery, the vehicle
may be jump started by connecting your
battery to another battery (called the
booster battery) with jumper cables.
How to jump start
1. Make sure the booster battery is 12 volts and the negative terminal is ground-
ed.
2. If the booster battery is in another vehi-
cle, do not let the two vehicles touch.
3. Turn off all unnecessary lights and ac-
cessories.
4. Connect the jumper cables exactly in
the sequence illustrated.
Battery fluid is SULFURIC ACID.
Do not let it come in contact with
the hooks, skin, clothing or the
vehicle.
If battery fluid gets on you, thor-
oughly flush the exposed area
with water immediately. Get medi-
cal help if the fluid has entered
your hooks.
If battery fluid is accidentally
swallowed, immediately drink a
large amount of milk or water, and
obtain immediate medical help.
Keep everyone including children
away from the battery.
The gas generated by a battery ex-
plodes if a flame or spark is
brought near it. Do not smoke or
light a match while jump starting.
Never attempt jump starting if the
discharged battery is frozen. It
could cause the battery to burst or
explode.
Whenever working on or around a
battery, always wear suitable-
hookprotectors, and remove met-
al objects such as rings, bands or
other metal jewelry.
Be sure the jumper cables and
clamps on them do not have loose
or missing insulation.
Do not jump start unless cables in
suitable condition are available.
A running engine can be danger-
ous. Keep your fingers, hands,
clothing, hair and tools away from
the cooling fan, belts and any oth-
er moving engine parts. Remov-
ing rings, watches and ties is ad-
visable.
Jump starting is dangerous if it
done incorrectly. If you are unsure
about the proper procedure for
jump starting, consult a compe-
tent mechanic.

In case of emergency 9-11
– CONTINUED –
Engine overheating
If the engine overheats, safely pull off the
road and stop the vehicle in a safe place.
If steam is coming from the
engine compartment
Turn off the engine and get everyone
away from the vehicle until it cools down.
If no steam is coming from
the engine compartment
1. Keep the engine running at idling
speed.
2. Open the hood to ventilate the engine
compartment.
Confirm that the cooling fan is turning. If
the fan is not turning, immediately turn off the engine and contact your authorized
dealer for repair.
3. After the engine coolant temperature
has dropped, turn off the engine.
If the temperature gauge stays at the
overheated zone, turn off the engine.
4. After the engine has fully cooled down,
check the coolant level in the reserve
tank.
If the coolant level is below the
“LOW ”
mark, add coolant up to the “FULL ” mark.
5. If there is no coolant in the reserve
tank, add coolant to the reserve tank.
Then remove the radiator cap and fill the
radiator with coolant.
If you remove the radiator cap from a hot
radiator, first wrap a thick cloth around the
radiator cap, then turn the cap counter-
clockwise slowly without pressing down
until it stops. Release the pressure from
the radiator. After the pressure has been
fully released, remove the cap by pressing
down and turning it.
Towing
If towing is necessary, it is best done by
your SUBARU dealer or a commercial
towing service. Observe the following pro-
cedures for safety.
Never attempt to remove the radia-
tor cap until the engine has been
shut off and has fully cooled down.
When the engine is hot, the coolant
is under pressure. Removing the
cap while the engine is still hot
could release a spray of boiling hot
coolant, which could burn you very
seriously.
Never tow AWD vehicles (both AT
and MT) with the front wheels raised
off the ground while the rear wheels
are on the ground, or with the rear
wheels raised off the ground while
the front wheels are on the ground.
This will cause the vehicle to spin
away due to the operation or deteri-
oration of the center differential.
900059

11
Maintenance and service
Maintenance schedule ....................................... 11-3
Maintenance precautions ........................... ....... 11-3
Before checking or servicing in the engine compartment ....................................... ................. 11-4
When you do checking or servicing in the engine
compartment while the engine is running ......... 11 -4
Engine hood ....................................... ................ 11-4
Engine compartment overview ....................... .. 11-6
Non-turbo models .................................. ................. 11-6
Turbo models ...................................... .................... 11-7
Engine oil ........................................ .................... 11-8
Checking the oil level ............................ ................. 11-8
Changing the oil and oil filter ................... ............. 11-8
Recommended grade and viscosity ................... .. 11-10
Recommended grade and viscosity under severe driving conditions ......................... ........... 11-11
Synthetic oil ..................................... ....................... 11-11
Cooling system .................................... .............. 11-12
Cooling fan, hose and connections ................. ..... 11-12
Engine coolant .................................... .................... 11-12
Air cleaner element ............................... ............. 11-15
Replacing the air cleaner element ................. ........ 11-15
Spark plugs ....................................... .................. 11-17
Recommended spark plugs ........................... ........ 11-17
Drive belts ....................................... .................... 11-18
Manual transmission oil ........................... ......... 11-18
Checking the oil level ............................ ................. 11-18
Recommended grade and viscosity ................... .. 11-19Automatic transmission fluid ......................
...... 11-20
Checking the fluid level .......................... ................ 11-20
Recommended fluid ................................. .............. 11-21
Front differential gear oil (AT vehicles) ......... ... 11-21
Checking the oil level ............................ ................. 11-21
Recommended grade and viscosity ................... .. 11-22
Rear differential gear oil ........................ ............ 11-22
Checking the gear oil level ....................... ............. 11-22
Recommended grade and viscosity ................... .. 11-23
Power steering fluid .............................. ............. 11-24
Checking the fluid level .......................... ................ 11-24
Recommended fluid ................................. .............. 11-24
Brake fluid ....................................... .................... 11-25
Checking the fluid level .......................... ................ 11-25
Recommended brake fluid ........................... .......... 11-25
Clutch fluid (MT vehicles) ........................ .......... 11-26
Checking the fluid level .......................... ................ 11-26
Recommended clutch fluid .......................... .......... 11-26
Brake booster ..................................... ................ 11-27
Brake pedal ....................................... .................. 11-27
Checking the brake pedal free play ................ ...... 11-27
Checking the brake pedal reserve distance ......... 11-27
Clutch pedal (MT vehicles) ........................ ........ 11-28
Checking the clutch function ...................... .......... 11-28
Checking the clutch pedal free play ............... ...... 11-28
Replacement of brake pad and lining ............... 11-28
Breaking-in of new brake pads and linings ......... . 11-29
Parking brake stroke .............................. ............ 11-29