air condition SUBARU LEGACY 2004 4.G Owner's Manual

4-16
Climate control
(Heat-def): Air flows through the windshield de-
froster outlets and foot outlet.
NOTE
When the “ ” mode is selected, the air condi-
tioner compressor operates automatically regard-
less of the position of the air conditioner button to
defog the windshield quickly. At the same time,
the air inlet selection is automatically set to “” mode.
Even with this mode selected, you can turn the air
conditioner ON/OFF and select interior air recircu-
lation or outside air introduction as desired. T Air inlet selection switch
Continued operation in the “ ” position
may fog up the windows. Switch to the
“ ” position as soon as the outside
dusty condition clears. A) Outside air is drawn into the passenger’s compart-
ment.
B) Interior air recirculates inside the passenger’s com- partment.
1) Air inlet selection switch
Select the air inlet by pushing the air inlet selection switch. : Interior air recirculates inside the passenger’s
compartment. Use this position when quickly warming
up the passenger compartment or cooling it down or
when preventing outside air from entering the passen-
ger compartment from the outside air. The indicator
light “ ” on the control panel comes on when
AB
1
UB4032BB

4-17
Climate control
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this switch is pushed.
: Outside air is drawn into the passenger com-
partment. When the air conditioning system is operat-
ed in the “AUTO” mode, this position is selected auto-
matically. The indicator light “ ” on the control
panel comes on when this switch is pushed. T Temperature control dial
1) Temperature control dial
NOTE
The temperature setting remains even after the ig-
nition switch is turned to the “OFF”. However, if
the battery cables are disconnected, the tempera- ture will be set to 77
°F (25 °C) automatically.
Set desired temperature by turning the temperature
control dial; turn the dial clockwise to raise the temper-
ature setting and turn it counterclockwise to lower it.
The temperature can be set in increments of 1 °F with-
in a range of 65 to 85 °F for US models and in incre-
ments of 0.5 °C within a range of 18 to 32 °C for Cana-
dian models.
Even when quick cooling or warming is necessary,
you do not have to change the temperature setting.
The Automatic Climate Control system operates at
maximum performance until the air in the passenger
compartment reaches to the specified temperature.
1UB4033BB

4-20
Climate control
„
Efficient cooling after parking in direct
sunlight
After parking in direct sunlight, drive with the windows
open for a few minutes to allow 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 conditioner for maximum cool- ing efficiency. „ Lubrication oil circulation in the refrig-
erant circuit
Operate the air conditioner compressor at a low en-
gine speed (at idle or low driving speeds) a few min-
utes each month during the off-season to circulate its
oil. „ Checking air conditioning system be-
fore summer season
Check the air conditioner unit for refrigerant leaks,
hose conditions, and proper operation each spring.
This check is best performed by your SUBARU dealer. „
Cooling and dehumidifying in high hu-
midity and low temperature weather condition
Under certain weather conditions (high relative humid-
ity, 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 any
problem with the air conditioning system. „ Air conditioner compressor shut-off
when engine is heavily loaded
To improve acceleration and gas mileage, the air con-
ditioner compressor is designed to temporarily shut off
during air conditioner operation whenever the acceler-
ator is fully depressed such as during rapid accerela-
tion or when driving on a steep upgrade. „ Refrigerant for your climate control system
Your air conditioner uses ozone friendly refrigerant
HFC134a. Therefore, the method of adding, changing
or checking the refrigerant is different from the method
for CFC12 (freon). Consult your SUBARU dealer for
service. Repairs needed as a result of using the wrong
refrigerant are not covered under warranty.

4-21
Climate control
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Air filtration system (if equipped)
If your vehicle’s air conditioning system is equipped
with a optional air filtration system, replace the filter el-
ement according to the replacement schedule shown
below. This schedule should be followed to maintain
the filter’s dust collection ability. Under extremely
dusty conditions, the filter should be replaced more
frequently. Since the filter element is a viscous type, it
is unnecessary to clean or wash the element. Have
your filter checked or replaced by your SUBARU deal- er.
Replacement schedule:
Every 12 months or 9,300 miles (15,000 km) whichev-
er comes first
NOTE
The filter can influence the air conditioning, heat-
ing and defroster performance if not properly
maintained.

7-3
Starting and operating
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and may produce a sulfur exhaust odor or smell.
SUBARU recommends that you try a different brand of
unleaded gasoline having lower sulfur to determine if
the problem is fuel related before returning your vehi-
cle to an authorized dealer for service. The CHECK
ENGINE warning light/Malfunction indicator lamp may
also turn on. If this occurs, return to your authorized
SUBARU dealer for diagnosis. If it is determined that
the condition is caused by the type of fuel used, re-
pairs may not be covered by your warranty. TMMT
Some gasoline contains an octane-enhancing additive
called MMT (Methylcyclopentadienyl Manganese Tri-
carbonyl). If you use such fuels, your emission control
system performance may deteriorate and the CHECK
ENGINE warning light/Malfunction indicator lamp may
turn on. If this happens, return to your authorized
SUBARU Dealer for service. If it is determined that the
condition is caused by the type of fuel used, repairs
may not be covered by your warranty. T Gasoline for cleaner air
Do not let fuel spill on the exterior surfaces of
the vehicle. Fuels containing alcohol may cause paint damage, which is not covered un-
der the SUBARU Limited Warranty.
Your use of gasoline with detergent additives will help
prevent deposits from forming in your engine and fuel
system. This helps keep your engine in tune and your
emission control system working properly, and is a
way of doing your part for cleaner air. If you continu-
ously use a high quality fuel with the proper detergent
and other additives, you should never need to add any
fuel system cleaning agents to your fuel tank.
Many gasolines are now blended with materials called
oxygenates. Use of these fuels can also help keep the
air cleaner. Oxygenated blend fuels, such as MTBE
(Methyl Tertiary Butyl ether) or ethanol (ethyl or grain
alcohol) may be used in your vehicle, but should con-
tain no more than 15% MTBE or 10% ethanol for the
proper operation of your SUBARU.
In addition, some gasoline suppliers are now produc-
ing reformulated gasolines, which are designed to re-
duce vehicle emissions. SUBARU approves the use of reformulated gasoline.
If you are not sure what the fuel contains, you should
ask your service station operators if their gasolines
contain detergents and oxygenates and if they have

7-8
Starting and operating
obligation under federal law to implement stricter vehi-
cle emission standards to reduce air pollution from
cars. A dynamometer is a treadmill or roller-like testing
device that allows your car’s wheels to turn while the
car remains in one place. Depending on the severity of
a state’s air pollution problems, the states must adopt
either a “basic” or “enhanced” vehicle emission in-
spection test. Normally, a portion of the basic emission
test consists of an emission inspector inserting an an-
alyzer probe into the exhaust pipe of an idling vehicle
for a short period of time. States with more severe air
pollution problems are required to adopt an enhanced
vehicle emission test. This test simulates actual driv-
ing conditions on a dynamometer and permits more
accurate measurement of tailpipe emitted pollution
than the basic emission test.
The U.S. Environmental Protection Agency (EPA) and
states using two-wheel dynamometers in their emis-
sion testing programs have
EXEMPTED SUBARU
AWD vehicles from the portion of the testing program
that involves a two-wheel dynamometer.
There are some states that use four-wheel dynamom-
eters in their testing programs. When properly used,
that equipment will not damage an AWD SUBARU ve-
hicle.
Under no circumstances should the rear wheels be jacked off the ground, nor should the driveshaft be dis-
connected for state emission testing.
The EPA has issued regulations for inspecting the On-
Board Diagnostic (OBD) system as part of the state
emissions inspection. The OBD system is designed to
detect engine and transmission problems that might
cause vehicle emissions to exceed allowable limits.
These inspections apply to all 1996 model year and
newer passenger cars and light trucks. Several states
plus the District of Columbia have opted to start the
OBD system inspection prior to the required EPA reg-
ulation effective date of January 1, 2002. Other states
will add OBD system inspection in 2002. y
The inspection of the OBD system consists of a vi-
sual operational check of the “ CHECK ENGINE” warn-
ing light/malfunction indicator lamp (MIL) and an ex-
amination of the OBD system with an electronic scan
tool while the engine is running. y A vehicle passes
the OBD system inspection if
proper the “ CHECK ENGINE ” warning light/MIL illumi-
nation is observed, there is no stored diagnostic trou-
ble codes, and the OBD system readiness monitors
are complete. y A vehicle fails
the OBD inspection if the “ CHECK
ENGINE ” warning light/MIL is not properly operating
or there is one or more diagnostic trouble codes stored

7-29
Starting and operating
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4. Insert the screwdriver into the hole.
5. Push down on the screwdriver, push down the but-
ton and move the selector lever from the “P” to the “N”position.
6. Remove the screwdriver from the hole. Depress
the brake pedal and start the engine.
Take your vehicle to the nearest SUBARU dealer im-
mediately to have the system repaired. Rear viscous limited slip differential
(LSD) (if equipped)
y
Never start the engine while a tire on one side
is jacked up, as the vehicle may move. y If one rear tire is spinning in mud, avoid con-
tinued spinning at high speed as this could ad-
versely affect the LSD. y If a different size rear tire is temporarily used
(as in an emergency), it will adversely affect the
LSD. Always replace it with a regular size tire as
soon as possible.
The LSD provides optimum distribution of power ac-
cording to the difference in revolutions between the
right and left rear wheels that may be caused by cer-
tain driving conditions, thereby improving driving sta-
bility on snow-covered, muddy or other slippery roads.
UB7037BA

8-2
Driving tips
Driving tipsNew vehicle break-in driving – the
first 1,000 miles (1,600 km)
The performance and long life of your vehicle are de-
pendent on how you handle and care for your vehicle
while it is new. Follow these instructions during the
first 1,000 miles (1,600 km):y
Do not race the engine. And do not allow engine
speed to exceed 4,000 rpm except in an emergency.y Do not drive at one constant engine or vehicle
speed for a long time, either fast or slow. y Avoid starting suddenly and rapid acceleration, ex-
cept in an emergency. y Avoid hard braking, except in an emergency.
The same break-in procedures should be applied to a
newly installed or overhauled engine or when brake
pads or brake linings are replaced with new ones.
Fuel economy hints
The following suggestions will help to save your fuel. y Select the proper gear position for the speed and
road conditions. y Avoid sudden acceleration or deceleration. Always
accelerate gently until you reach the desired speed.
Then try to maintain that speed for as long as possible. y Do not pump the accelerator and avoid racing the
engine. y Avoid unnecessary engine idling.
y Keep the engine properly tuned.
y Keep the tires inflated to the correct pressure shown
on the tire placard, which is located under the door
latch on the driver’s side. Low pressure will increase
tire wear and fuel consumption.y Use the air conditioner only when necessary.
y Keep the front and rear wheels in proper alignment.
y Avoid carrying unnecessary luggage or cargo.

8-3
Driving tips
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Engine exhaust gas (Carbon monox-
ide)
yNever inhale engine exhaust gas. Engine ex-
haust gas contains carbon monoxide, a color-
less and odorless gas which is dangerous, or
even lethal, if inhaled.y Always properly maintain the engine exhaust
system to prevent engine exhaust gas from en-
tering the vehicle.y Never run the engine in a closed space, such
as a garage, except for the brief time needed to
drive the vehicle in or out of it.y Avoid remaining in a parked vehicle for a
lengthy time while the engine is running. If that
is unavoidable, then use the ventilation fan to
force fresh air into the vehicle. y Always keep the front ventilator inlet grille
free from snow, leaves or other obstructions to
ensure that the ventilation system always
works properly. y If at any time you suspect that exhaust fumes
are entering the vehicle, have the problem
checked and corrected as soon as possible. If
you must drive under these conditions, drive only with all windows fully open.y
Keep the trunk lid or rear gate closed while
driving to prevent exhaust gas from entering
the vehicle.
NOTE
Due to the expansion and contraction of the met-
als used in the manufacture of the exhaust sys-
tem, you may hear a crackling sound coming from
the exhaust system for a short time after the en-
gine has been shut off. This sound is normal.

8-5
Driving tips
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combustion), have your vehicle checked and repaired
by an authorized SUBARU dealer.yDo not apply undercoating or rust prevention treat-
ment to the heat shield of catalytic converter and the
exhaust system.Periodic inspections
To keep your vehicle in the best condition at all times,
always have the recommended maintenance services
listed in the maintenance schedule in the “Warranty
and Maintenance Booklet” performed at the specified
time or mileage intervals.