2003 SUBARU IMPREZA WRX fuel pressure

3
3-1
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Ignition switch 3-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LOCK 3-2
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ACC 3-4
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ON 3-4
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START 3-4
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Key reminder chime 3-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Key interlock release (AT vehicles only) 3-4 . . . . . .
Hazard warning flasher 3-6 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Meters and gauges 3-6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Speedometer 3-6
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Odometer/Trip meter 3-6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tachometer 3-7
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Fuel gauge 3-8
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Temperature gauge 3-9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ambient temperature gauge (if equipped) 3-9 . . . .
Warning and indicator lights 3-10 . . . . . . . . . . . . . . . . . . . .
Seatbelt warning light and chime 3-10 . . . . . . . . . . . . . . .
SRS airbag system warning light 3-11 . . . . . . . . . . . . . . .
CHECK ENGINE warning light/ Malfunction indicator lamp 3-11 . . . . . . . . . . . . . . . . . . . .
Charge warning light 3-12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Oil pressure warning light 3-12 . . . . . . . . . . . . . . . . . . . . . . .
AT OIL TEMPerature warning light (for AT vehicles) 3-13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ABS warning light 3-13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Brake system warning light 3-14 . . . . . . . . . . . . . . . . . . . . .
Door open warning lights 3-14 . . . . . . . . . . . . . . . . . . . . . . . .
Front-wheel drive warning light (for AT vehicles – if equipped) 3-15 . . . . . . . . . . . . . . . . Shift position indicator (AT vehicles) 3-15
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Turn signal indicator lights 3-15 . . . . . . . . . . . . . . . . . . . . . .
High beam indicator light 3-15 . . . . . . . . . . . . . . . . . . . . . . . .
Clock 3-15
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Light control switch 3-16 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Headlights 3-16
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High/low beam change (dimmer) 3-17 . . . . . . . . . . . . . . .
Headlight flasher 3-17 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Daytime running light system 3-18 . . . . . . . . . . . . . . . . . . .
Turn signal lever 3-18 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Illumination brightness control 3-19 . . . . . . . . . . . . . . . .
Parking light switch 3-20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fog light switch (if equipped) 3-20 . . . . . . . . . . . . . . . . . .
Wiper and washer 3-21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Windshield wiper and washer switches 3-22 . . . . . . .
Rear window wiper and washer switch – Wagon 3-24
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Rear window defogger switch 3-25 . . . . . . . . . . . . . . . . . .
Mirrors 3-27
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Inside mirror 3-27
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Outside mirrors 3-29 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tilt steering wheel 3-31 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Horn 3-32
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Instruments and controls

Instruments and controls
3-12
NOTE This light also comes on when the fuel filler cap is not tightened until it clicks.
If you have recently refueled your vehicle, the cause
of the CHECK ENGINE warning light/malfunction indi-
cator lamp coming on could be a loose or missing
fuel filler cap. Remove the cap and retighten it until it
clicks. Make sure nothing is interfering with the seal-
ing of the cap. Tightening the cap will not make the
CHECK ENGINE warning light turn off immediately. It
may take several driving trips. If the light does not go
out, take your vehicle to your authorized SUBARU
dealer immediately. If the light is blinking:
If the light is blinking while driving, an engine misfire
condition has been detected which may damage
the emission control system.
To prevent serious damage to the emission control
system, you should do the following: Reduce vehicle speed.
Avoid hard acceleration.
Avoid steep uphill grades.
Reduce the amount of cargo, if possible.
Stop towing a trailer as soon as possible. The CHECK ENGINE warning light may stop blink-ing and come on steadily after several driving trips.
You should have your vehicle checked by an autho-
rized SUBARU dealer immediately.
Charge warning light
If this light comes on when the engine is running, itmay indicate that the charging system is not work-
ing properly. If the light comes on while driving or does not go out
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 condi-
tion but the light remains on, contact your nearest
SUBARU dealer immediately. Oil pressure warning light
If this light comes on 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 comes on while driving or does not go out
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 on,
contact your nearest SUBARU dealer immediately.

Starting and operating
7-5
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1) Open 2) Close
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 and spray 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 of an accident.

Driving tips
8-2
New vehicle break-in driving –
the first 1,000 miles (1,600 km)
The performance and long life of your vehicle are
dependent on how you handle and care for your ve-
hicle while it is new. Follow these instructions duringthe first 1,000 miles (1,600 km): Do not race the engine. And do not allow engine
speed to exceed 4,000 rpm except in an emergen-
cy. Do not drive at one constant engine or vehicle
speed for a long time, either fast or slow. Avoid starting suddenly and rapid acceleration,
except in an emergency. Avoid hard braking, except in an emergency.
The same break-in procedures should be applied to
an overhauled engine, newly mounted engine or
when brake pads or brake linings are replaced withnew ones. Fuel economy hints The following suggestions will help to save your fuel.
Select the proper gear position for the speed and
road conditions. Avoid sudden acceleration or deceleration. Al-
ways accelerate gently until you reach the desired
speed. Then try to maintain that speed for as longas possible. Do not pump the accelerator and avoid racing the
engine. Avoid unnecessary engine idling.
Keep the engine properly tuned.
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. Use the air conditioner only when necessary.
Keep the front and rear wheels in proper align-
ment. Avoid carrying unnecessary luggage or cargo.

Driving tips
8-17
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The load capacity of your vehicle is determined by
weight, not by available cargo space. The maximum
load you can carry in your vehicle is shown as the
Vehicle Capacity Weight on the tire information label
attached to the driver ’s side door jamb. It includes
the total weight of driver and all passengers andtheir belongings, any optional equipment such as a
trailer hitch, roof rack or bike carrier, etc., and the
tongue load of a trailer.
The tire information label also shows recommended
tire inflation pressure under full loading and trailer
towing conditions. Adjust tire inflation pressures
according to the loading conditions. For the tire inflation pressures, refer to the
“Tires and wheel ”
section in Chapter 11. GVWR and GAWR (Gross Vehicle
Weight Rating and Gross Axle WeightRating)
The certification plate attached to the driver ’s side
door jamb shows GVWR (Gross Vehicle Weight Rat-
ing) and GAWR (Gross Axle Weight Rating).
The GVW (Gross Vehicle Weight) must never ex- ceed the GVWR. GVW is the combined total of
weight of the vehicle, fuel, driver, all passengers,
luggage, any optional equipment and trailer tongue

Maintenance and service
11-4
Always be very careful to avoid injury when
working on the vehicle. Remember that some of the materials in the vehicle may be hazard-
ous if improperly used or handled, for exam-ple, battery acid. Your vehicle should only be serviced by per-
sons fully competent to do so. Serious per-sonal injury may result to persons not experi-enced in servicing vehicles. Always use the proper tools and make cer-
tain that they are well maintained. Never get under the vehicle supported only
by a jack. Always use a safety stands to sup-port the vehicle. Never keep the engine running in a poorly
ventilated area, such as a garage or other
closed areas. Do not smoke or allow open flames around
the fuel or battery. This will cause a fire. Because the fuel system is under pressure,
replacement of the fuel filter should be per-
formed only by your SUBARU dealer. Wear adequate eye protection to guard
against getting oil or fluids in your eyes. If something does get in your eyes, thoroughly
wash them out with clean water. Do not tamper with the wiring of the SRS airbag system or seatbelt pretensioner sys-tem, or attempt to take its connectors apart,as that may activate the system or it can ren-der it inoperative. The wiring and connectorsof these systems are yellow for easy identifi-cation. NEVER use a circuit tester for these wiring. If your SRS airbag or seatbelt pretensionerneeds service, consult your nearest SUBARU
dealer.
Before checking or servicing in the
engine compartment
Always stop the engine and set the parking
brake firmly to prevent the vehicle from mov- ing. Always let the engine cool down. Engine
parts become very hot when the engine is run-
ning and remain hot for some time after theengine is stopped. Do not spill engine oil, engine coolant, brake
fluid or any other fluid on hot engine compo-nents. This may cause a fire. Always remove the key from the ignition
switch. When the ignition switch is in the
“ON” position, the cooling fan may operate

Maintenance and service
11-42
proach the curbs as squarely as possible. Also,
make sure the tires are not pressed against thecurb when you park the vehicle.If you feel unusual vibration while driving or
find it difficult to steer the vehicle in a straight
line, one of the tires and/or wheels may be dam- aged. Drive slowly to the nearest authorized
SUBARU dealer and have the vehicle inspected. Tire pressures and wear
Maintaining the correct tire pressures helps to maxi-
mize the tires ’ service lives and is essential for good
running performance. Check and, if necessary, ad-
just the pressure of each tire (including the spare) at least once a month (for example, during a fuel stop)
and before any long journey.
Check the tire pressures when the tires are cold.
Use a pressure gauge to adjust the tire pressures to
the values shown on the tire placard. The tire plac-
ard is located on the door pillar on the driver ’s side.
Driving even a short distance warms up the tires
and increases the tire pressures. Also, the tire pres-
sures are affected by the ambient temperature. It is
best to check tire pressure outdoors before driving the vehicle.
When a tire becomes warm, the air inside it ex-
pands, causing the tire pressure to increase. Be
careful not to mistakenly release air from a warm tire
to reduce its pressure.

Maintenance and service
11-43
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NOTE The air pressure in a tire increases by approxi-
mately 4.3 psi (30 kPa, 0.3 kg/cm 2
) when the tire
becomes warm. The tires are considered cold when the vehicle
has been parked for at least three hours or hasbeen driven less than one mile (1.6 km).
WARNING
Do not let air out of warm tires to adjust
pressrue. Doing so will result in low tire pres- sure.
Incorrect tire pressures detract from controllability
and ride comfort, and they cause the tires to wear
abnormally.
Correct tire pressure (tread worn evenly)
Roadholding is good, and steering is responsive.
Rolling resistance is low, so fuel consumption is
also lower.