2002 SUBARU IMPREZA WRX battery

In case of emergency
9-14
(1) Connect one jumper cable to the positive (+)
terminal on the discharged battery.
(2) Connect the other end of the jumper cable to
the positive (+) terminal of the booster battery.
(3) Connect one end of the other cable to thenegative (–) terminal of the booster battery.
(4) Connect the other end of the cable to the en-gine lifting bracket.
Make sure that the cables are not near any mov-
ing parts and that the cable clamps are not in
contact with any other metal.
5. Start the engine of the vehicle with the booster
battery and run it at moderate speed. Then start the
engine of the vehicle that has the discharged bat-
tery.
6. When finished, carefully disconnect the cables in
exactly the reverse order. Engine overheating
WARNING
Never attempt to remove the radiator cap until the engine has been shut off and has fullycooled down. When the engine is hot, thecoolant is under pressure. Removing the cap
while the engine is still hot could release aspray of boiling hot coolant, which could burn
you very seriously.
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 the engine off 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 compart-ment.

Maintenance and service
11-2
Wheel balance 11-41. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wear indicators 11-41 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tire rotation 11-42
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tire replacement 11-43 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wheel replacement 11-44 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wheel covers 11-44 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Aluminum wheels (If equipped) 11-45 . . . . . . . . . . . . . . . .
Windshield washer fluid 11-46 . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacement of windshield wiper blades 11-47 . .
Battery 11-50
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuses 11-51
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Main fuse 11-53
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation of accessories 11-54 . . . . . . . . . . . . . . . . . . . . . . .
Replacing bulbs 11-55 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Headlight 11-56
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Front turn signal light and parking light 11-58 . . . . . .
Front fog light (if equipped) 11-61 . . . . . . . . . . . . . . . . . . . . .
Front side marker light 11-62 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear combination lights 11-63 . . . . . . . . . . . . . . . . . . . . . . . . . .
License plate light 11-65 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Room light, spot light and cargo area light 11-66 . . .
Trunk light 11-67
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
High mount stop light 11-67 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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. Ensure your eyes are free of oil and fluid, as
they can be harmful to your eyes. If you get one in your eyes, wash your eyes with clean
water. For your safety, you are wise to weareye protection.
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

Maintenance and service
11-7
– CONTINUED –
Engine compartment overview 2.5 liter model
HGB004BB
1) Manual transmission oil level gauge
(MT) (page 11-23) or Differential
gear oil level gauge (AT) (page 11-26)
2) Air cleaner element (page 11-18)
3) Clutch fluid reservoir (page 11-31)
4) Automatic transmission fluid level gauge (page 11-24)
5) Brake fluid reservoir (page 11-30)
6) Windshield washer tank (page
11-46)
7) Fuse box (page 11-51)
8) Battery (page 11-50)
9) Engine oil filler cap (page 11-9)
10) Engine coolant reservoir (page 11-14)
11) Radiator cap (page 11-14)
12) Engine oil level gauge (page 11-9)
13) Power steering fluid reservoir (page 11-29)

Maintenance and service
11-8
2.0 liter (Turbo) model
HGB005BB
1) Manual transmission oil level
gauge (MT) (page 11-23)
2) Air cleaner element (page
11-18)
3) Clutch fluid reservoir (page
11-31)
4) Brake fluid reservoir (page 11-30)
5) Windshield washer tank (page 11-46)
6) Fuse box (page 11-51)
7) Battery (page 11-50)
8) Engine oil filler cap (page 11-9)
9) Engine coolant reservoir (page
11-14)
10) Engine oil level gauge (page 11-9)
11) Radiator cap (page 11-14)
12) Power steering fluid reservoir
(page 11-29)
1110

Maintenance and service
11-50
Battery
WARNING
Before beginning work on or near any bat-
tery, be sure to extinguish all cigarettes,
matches, and lighters. Never expose a batteryto an open flame or electric sparks. Batteriesgive off a gas which is highly flammable andexplosive. For safety, in case an explosion does occur,
wear eye protection or shield your eyes when
working near any battery. Never lean over a
battery. Do not let battery fluid contact eyes, skin,
fabrics, or paint because battery fluid is a cor- rosive acid. If battery fluid gets on your skin or in your eyes, immediately flush the area
with water thoroughly. Seek medical help im-
mediately if acid has entered the eyes.If battery fluid is accidentally swallowed,
immediately drink a large amount of milk or
water, and seek medical attention immediately. To lessen the risk of sparks, remove rings,
metal watchbands, and other metal jewelry.
Never allow metal tools to contact the positive because a short circuit will result.
Keep everyone including children away
from the battery. Charge the battery in a well-ventilated area.
Battery posts, terminals and related acces-
sories contain lead and lead compounds,
chemicals known to the State of California to
cause cancer and reproductive harm.
Wash
hands after handling.
CAUTION
Never use more than 10 amperes when charg- ing the battery because it will shorten batterylife.

Maintenance and service
11-51
– CONTINUED –
OM-H1048
1) Cap
2) Upper level 3) Lower level
It is unnecessary to periodically check the battery
fluid level or periodically refill with distilled water.
However, if the battery fluid level is below the lower
level, remove the cap. Fill to the upper level with dis-
tilled water. Fuses
CAUTION
Never replace a fuse with one having a higher
rating or with material other than a fuse be-
cause serious damage or a fire could result.
The fuses are designed to melt during an overload
to prevent damage to the wiring harness and electri-
cal equipment. The fuses are located in two fuseboxes.
HGB006BA
The one is located under the instrument panel be- hind the fuse box cover on the driver ’s seat side.

Specifications
12-3
– CONTINUED –
Engine
Engine model
EJ251
(2.5-liter, SOHC, non-turbo)EJ205
(2.0-liter, DOHC, turbo)
Engine typeHorizontally opposed, liquid cooled 4 cylinder, 4-stroke gasoline engine
Displacement cu in. (cc)149.9 (2,457)121.7 (1,994)
Bore × Stroke in. (mm)3.92 × 3.11 (99.5 × 79.0)92.0 × 75.0 (3.62 × 2.95)
Compression ratio10.0 : 18.0 : 1
Firing order1 – 3 – 2 – 4
Electrical system
Battery type
di tEurope modelMT12V-48AH (55D23L)and capacity (5HR)ATWith 2.5-liter engine12V-52AH (75D23L)(5HR)With 2.0-liter engine12V-52AH (65D23L)
Alternator2.5-liter engine12V – 75A
2.0-liter engine12V – 75A
Spark plugs2.5-liter engineBKR6E-11 (NGK)
BKR5E-11 (NGK)
RC10YC4 (Champion)
2.0-liter turbo enginePFR6G (NGK)
AT : Automatic transmission MT : Manual transmission