2002 SUBARU IMPREZA WRX check engine

Climate control
4-11
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Cooling and dehumidifying in high humidity and low temperatureweather condition
Under certain weather conditions (high relative hu-
midity, low temperatures, etc.) a small amount of wa-
ter vapor emission from the air outlets may be not-
iced. 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
conditioner compressor is designed to temporarily
shut off during air conditioner operation whenever
the accelerator is fully depressed such as duringrapid acceleration or when driving on a steepupgrade. Refrigerant for your climate control system
Your air conditioner uses ozone friendly refrigerant
HFC134a. Therefore, the method of adding, chang-
ing 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.

7
7-1
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Fuel 7-2
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Fuel requirements 7-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuel filler lid and cap 7-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
State emission testing (U.S. only) 7-6 . . . . . . . . . . . . .
Preparing to drive 7-7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Starting the engine 7-8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Starting the engine for a manual transmission vehicle 7-8
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Starting the engine for an automatic
transmission vehicle 7-8 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Starting the engine during cold weather below –4 °F ( –20 °C) 7-9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Starting a flooded engine 7-9 . . . . . . . . . . . . . . . . . . . . . . . .
Stopping the engine 7-10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Manual transmission 7-10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Shifting speeds 7-11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Driving tips 7-12
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Automatic transmission 7-13 . . . . . . . . . . . . . . . . . . . . . . . . . .
Selector lever for automatic transmission 7-14 . . . .
Shift lock release 7-18 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear viscous limited slip differential
(LSD) (if equipped) 7-20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power steering 7-20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Braking 7-21
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Braking tips 7-21
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Brake system 7-21
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Disc brake pad wear warning indicators 7-22 . . . . . .
ABS (Anti-lock Brake System) 7-22 . . . . . . . . . . . . . . . . . ABS system self-check 7-23
. . . . . . . . . . . . . . . . . . . . . . . . . . .
ABS warning light 7-23 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parking your vehicle 7-25 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cruise control (if equipped) 7-27 . . . . . . . . . . . . . . . . . . . . .
To set cruise control 7-27 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
To temporarily cancel the cruise control 7-28 . . . . . .
To turn off the cruise control 7-28 . . . . . . . . . . . . . . . . . . . .
To change the cruising speed 7-28 . . . . . . . . . . . . . . . . . . .
Starting and operating

Starting and operating
7-5
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2. Remove the fuel filler cap by turning it slowly
counterclockwise.
WARNING
Gasoline vapor is highly flammable. Before
refueling, always first stop the engine and
make sure that there are no lighted cigarettes,open flames or electrical sparks in the adja-cent area. When opening the cap, do not remove the
cap quickly. Fuel may be under pressure andspray out of the fuel filler neck especially in
hot weather, which may cause injury.
3. Stop filling the tank after the fuel filler pump auto-
matically stops. Do not add any more fuel.
4. Put the cap back on, turn it clockwise until you
hear a clicking noise. Be certain not to catch the
tether under the cap while tightening.
5. Close the fuel filler lid completely.
If you spill any fuel on the painted surface, rinse it
off immediately. Otherwise, the painted surface
could be damaged. NOTE If the fuel filler cap is not tightened until it clicks or if the tether is caught under the cap, the CHECK ENGINE warning light may come on. Re-fer to the
“Warning and indicator lights ” section
located in chapter 3.CAUTION
Never add any cleaning agents to the fuel
tank. The addition of a cleaning agent may
cause damage to the fuel system. Make sure that the cap is tightened until it
clicks to prevent fuel spillage in the event ofan accident. Do not let fuel spill on the exterior surfaces
of the vehicle.Fuels may cause paint damage, which is not
covered under the SUBARU Limited Warranty. Always use a genuine SUBARU fuel filler
cap. If you use the wrong cap, it may not fit orhave proper venting, and your fuel tank and
emission control system might be damaged.

Starting and operating
7-7
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CAUTION
Resultant vehicle damage due to improper testing is not covered under the SUBARU Lim-
ited Warranty and is the responsibility of the state inspection program or its contractors orlicensees. Preparing to drive
You should perform the following checks and adjust-
ments every day before you start driving.
1. Check that all windows, mirrors, and lights are
clean and unobstructed.
2. Check the appearance and condition of the tires.
Also check tires for proper inflation.
3. Look under the vehicle for any sign of the leaks.
4. Check that the hood, trunk and rear gate are fullyclosed.
5. Check the adjustment of the seat.
6. Check the adjustment of the inside and outside
mirrors.
7. Fasten your seatbelt. Check that your passen-gers have fastened their seatbelts.
8. Check the operation of the warning and indicator
lights when the ignition switch is turned to the
“ON”
position.
9. Check the gauges, indicator and warning lights
after starting the engine. NOTE Engine oil, engine coolant, brake fluid, washer
fluid and other fluid levels should be checked
daily, weekly or at fuel stops.

Starting and operating
7-8
Starting the engine
CAUTION
Do not operate the starter motor continuously
for more than ten seconds. If the engine fails to start after operating the starter for five to ten seconds, wait for ten seconds or more be-fore trying again.
Starting the engine for a manual transmission vehicle
1. Apply the parking brake.
2. Turn off unnecessary lights and accessories.
3. Press the clutch pedal to the floor and shift the
shift lever into neutral. Hold the clutch pedal to the
floor while starting the engine.
The starter motor will only operate when the clutch
pedal is pressed fully to the floor.
4. Turn the ignition switch to the “ON” position and
check the operation of the warning and indicatorlights. Refer to the “Warning and indicator light ” sec-
tion (chapter 3).
5. Turn the ignition switch to the “START” position
without depressing the accelerator pedal. Release the key immediately after the engine has started.
If the engine does not start within ten seconds, wait
a while and then turn the ignition switch to the
“START”
position again while depressing the accel-
erator pedal half way down.
6. Confirm that all warning and indicator lights have
gone off after the engine has started. The fuel injec-
tion system automatically lowers the idle speed as
the engine warms up.
Starting the engine for an automatic transmission vehicle
1. Apply the parking brake.
2. Turn off unnecessary lights and accessories.
3. Shift the selector lever to the “P” or “N” position
(preferably “P” position).
The starter motor will only operate when the select lever is at the “P” or “N” position.
4. Turn the ignition switch to the “ON” position and
check the operation of the warning and indicator lights. Refer to the “Warning and indicator lights ”
section (chapter 3).
5. Turn the ignition switch to the “START” position
without depressing the accelerator pedal. Release
the key immediately after the engine has started.
If the engine does not start within ten seconds, wait

Starting and operating
7-23
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CAUTION
The ABS system does not always decrease
stopping distance. You should always main- tain a safe following distance from other ve- hicles. When driving on badly surfaced roads, grav-
el roads, icy roads, or over deep newly fallen
snow, stopping distances may be longer for a
vehicle with the ABS system than one without. When driving under these conditions, there-
fore, reduce your speed and leave ample dis-tance from other vehicles. When you feel the ABS system operating,
you should maintain constant brake pedal
pressure. Do not pump the brake pedal since doing so may defeat the operation of the ABS system.
ABS system self-check
You may feel a slight shock in the brake pedal and
hear the operating sound of ABS from the engine
compartment just after the vehicle is started. This iscaused by an automatic functional test of the ABS
system being carried out and does not indicate any
abnormal condition.
ABS warning light
HG1016FA
The ABS warning light comes on when the ignition
switch is turned to the “ON” position and goes out
after about two seconds. This is an indication that the ABS system is working
properly.
When driving with an insufficient battery voltage
such as when the engine is jump started, the ABS
warning light may come on. This is due to the low
battery voltage and does not indicate a malfunction.
When the battery becomes fully charged, the light will go out.

Driving tips
8-3
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Engine exhaust gas (Carbon monoxide)
WARNING
Never 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. Always properly maintain the engine ex-
haust system to prevent engine exhaust gasfrom entering the vehicle. 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. Avoid remaining in a parked vehicle for a
lengthy time while the engine is running. Ifthat is unavoidable, then use the ventilationfan to force fresh air into the vehicle. Always keep the front ventilator inlet grille
free from snow, leaves or other obstructionsto ensure that the ventilation system always
works properly. If at any time you suspect that exhaust
fumes are entering the vehicle, have the prob-lem checked and corrected as soon as pos- sible. If you must drive under these condi-tions, drive only with all windows fully open.
Keep the trunk lid or rear gate closed while
driving to prevent exhaust gas from enteringthe 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 comingfrom the exhaust system for a short time afterthe engine has been shut off. This sound is nor-mal.

Driving tips
8-5
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running rough (misfiring, backfiring or incomplete
combustion), have your vehicle checked and re-
paired by an authorized SUBARU dealer.Do not apply undercoating or rust prevention
treatment to the heat shield of catalytic converterand the exhaust system.
WARNING
Avoid fire hazards. Do not drive or park the
vehicle anywhere near flammable materials
(e.g. grass, paper, rags or leaves), because the catalytic converter operates at very hightemperatures. Keep everyone and flammable materials
away from the exhaust pipe while the engineis running. The exhaust gas is very hot. 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.