Subaru 2002 Impreza User manual

2002 IMPREZA SERVICE MANUAL QUICK REFERENCE INDEX
NEW CAR INFORMATIONSECTION
FOREWORD
This manualhasbeen preparedto provideinformation
for the construction, operationand other technical de-
tails of SUBARU vehicles.
Readthis manual thoroughly and make the most of it
to give better service to your customers and improve
your knowledge of vehicle maintenance.
All information, illustration and specifications con-
tainedinthis manualare basedonthe latestproduct
information available at the time of publication ap-
proval.
FUJI HEAVY INDUSTRIESLTD.
W1830BE

FOREWORD
QUICK REFERENCEINDEX
I) *- D
*e

FOREWORD QUICK REFERENCE INDEX

FOREWORD
All rightreserved.This bookmay notbereproducedor
copied, in whole
or in part, without the written permis-
sion
of FUJI HEAVY INDUSTRIESLTD., TOKYO JA-
PAN
SUBARU, @ and @ are trademarks of FUJI
HEAVY INDUSTRIESLTD.
0 Copyright 2001 FUJI HEAVY INDUSTRIES LTD.

a
SPECIFICATIONS SPC
Page
1.
lmpreza .. ... ...................... .. . . . ................ . . . . . . .. . ........ .... . . . . .. . .. . . 2

IMPREZA
Specifications
Model
Overall length mm (in)
Overallwidth mm (in)
Overallheight(atCW) mm (in)
1. lmpreza
Sedan Wagon OUTBACK
4,405
(1 73.4)
1,730 (68.1) 1,695(66.7) 1,710 (67.3)
1,440 (56.7) 1,465 (57.7), 1,475 (58.1),
1,485 (58.5)*2 1,495 (58.9)*2
A: DIMENSIONS
Compartment Length mm (in)
Width mm (in)
Height mm (in)
Wheelbase mm (in)
Tread Front mm (in)
Rear mm (in)
I I
1,890 (74.4) 1,845 (72.6)
1,380 (54.3)
1,180 (46.5) 1,200(47.2),
1,200 (47.2),
1 ,I 50 (45.3)*3
2,525 (99.4)
1,485 (58.5) 1,465 (57.7) 1,460 (57.5)
1 ,I 50 (45.3)*3
1,475 (58.1), 1,455(57.3) 1,455 (57.3)
1,480 (58.3)*1
Minimumroadclearance mm (in)
150 (5.9), 150 (5.9), 160(6.3)
155 (6.1)*1 155(6.1)*1
B: ENGINE
Model
Enginetype Turbo 2.0 L 2.5
L
Horizontally opposed,liquidcooled,4-cylinder, 4-strokegasolineengine
I Valve arrangement I Overheadcamshafttype
Bore
x Stroke mm (in)
Displacement cm3 (cu in)
Compressionratio
Idlespeedat ParWNeutral rPm
Firingorder
position (NCOFF)
Maximumoutput kW (HP)/rpm
Maximumtorque N.m (kgf-m,ft-lb)/rpm
~~
92 x 75
(3.62
x 2.95) 99.5
x 79.0
(3.91 7 x 3.1 10)
1,994 (1 21.67) 2,457 (149.9)
8.0
10.0
1-3-2-4 650 (MT)
750 700 (AT)
123
(1 65)/5,600
226
(23.0, 166)/4,000
160(215)/6,000
294
(30.0, 217)/4,000
SPC-2

IMPREZA
Specifications
Model Turbo 2.0 L
12" k 10"/750
Ignitiontimingat idlingspeed
Spark plug NGK: PFRGG
BTDC/rpm
Generator 12V - 75A
MT: 12V
- 48AH (55D23L)
AT: 12V
- 52AH (65D23L)
Battery Type
Reservecapacity min MT:99
AT:
111
Coldcranking amp MT: 356
amperes AT: 420
2.5 L
MT: 10"
f 10°/650
AT: 10"
f 1O"I700
CHAMPION:RC1OYC4 (standard)
NGK:BKR5E-11
NGK: BKR6E-11
12V
- 90A
MI12V
- 48AH (55D23L)
AT: 12V
- 52AH (75D23L)
MT:99
AT: 118
MT:356
AT: 520
I Model Turbo 2.0
L
Transmissiontype 5MTk1 4ATk2
Clutchtype DSPD TCC
Gearratio
I 1st 3.454 2.785
I
I I
2nd 1.947 1.545
I
4th
5th
I I I I I I
5MT*l:5 forwardspeedswith synchromeshand 1 -reverse
4AT*2:Electronically controlledfully-automatic,4-forwardspeedsand1-reverse
DSPD:Dry SinglePlateDiaphragm
TCC:TorqueConverterClutch
0.972 0.694
0.738
-
SPC-3
Reduction 1st reduction
gear (Front
drive) Final
J
Reverse
3.333 2.272
Type
of gear
- Helical
Gear ratio
- 1.000
Tvpe
of gear Hypoid Hypoid
Reduction
gear (Rear
drive)
-
Transfer Type of gear Helical
1.100
reduction Gear
ratio
Final Tvpe of gear Hypoid Hypoid
-

IMPREZA
Model
Transmissiontype
Clutchtype
Specifications
2.5 L
RS OTHERS
5MTA1 4ATA2 5MTA1 4ATA2
DSPD TCC DSPD TCC
Reduction
gear (Front
drive)
Reduction
gear (Rear
drive)
1 st I 3.454 I 3.027 I 3.454 I 2.785 I
1st reduction
Final
reduction
Transfer
reduction
Final
reduction
2nd I 2.062 I 1.619 I 2.062 I 1.545 I
Type of gear
Gear ratio
Type of gear
Gear ratio
Type
of gear
Gearratio
3rd I 1.448 I 1.000 I 1.448 I 1 .ooo I
~~ ~
Hypoid Hypoid Hypoid Hypoid
4.111 4.444 3.900 4.111
Helical
-
Helical -
1 .ooo
-
1.000 -
Hypoid Hypoid Hypoid Hypoid
4.111 4.444 3.900 4.111
4th I 1.088 I 0.694 1 1.088 1 1.694 I
I
5th I 0.780 I - I 0.780 I -
Reverse I 3.333 I 2.272 I 3.333 I 2.272 I
I
-
I
-
I
-
I
Dualrange I -
Typeofgear I - I Helical I - I Helical 1
Gearratio I - I 1.000 I - I 1.000 1
SPC-4

IMPREZA
Specifications
Turns, lock to lock
Minimumturning m(ft) Curbto curb
circle Wall to wall
E: STEERING
3.2 3
10.2(33.5) 10.8 (35.4)
11.1 (36.3) 11.7(38.3)
Front
Rear Macphersonstruttype, Independent,Coilspring
Duallinktype, Independent, Coilspring
Service brakesystem
Front
Rear
F: SUSPENSION
I
Dualcircuithydraulicwith vacuum suspendedpowerunit
Ventilated disc brake
Disc brake Drumbrake, Discbrakekl
I
Model TS
Rimsize
15 x 6JJ
Tire size P195/60R1587H
G:BRAKE
OTHERS
16
x 6 '/2 JJ
P205/55R1689V
Type Steel belted radial, Tubeless
I ParkinQ brake I Mechanicalon rear brakes I
I Model Turbo 2.0 L
H: TIRE
2.5 L
Fueltank
e (US gal, Impgal)
Engineoil
1 Upper level e (US qt, Impqt)
I: CAPACITY
5MT 4AT 5MT 4AT
60 (15.9, 13.2) 60 (15.9, 13.2)
4.5 (4.8,4.0) 4.0 (4.2,3.5)
Lower level (USqt, Impqt)
Transmissiongear oil
e (US qt, Impqt)
Automatictransmissionfluid
AT differentialgear oil
AWD reardifferentialgear oil
Powersteeringfluid
Enginecoolant
(USqt, Impqt)
e (USqt, Impqt)
e (USqt, Impqt)
e (USqt, Impqt)
e (USqt, Impqt)
I I I
3.5 (3.7,3.1) 3.0 (3.2, 2.6)
3.5 (3.7,3.1)
- 3.5 (3.7,3.1) -
- 9.3 (9.8,8.2) - 9.5 (10.0,8.4)
- 1.2(1.3, 1 .l) - 1.2(1.3, 1.1)
0.8 (0.8,0.6)
0.7 (0.7,0.6)
7.7 (8.1,6.8)
I 7.6(8.0,6.7) I 7.0(7.4,6.2) I 6.9 (7.3,6.1)
a
SPC-5

Curbweight (C.W.) I Front kgf (Ib) 5MTA1 4ATA1 5MT 4AT
826 (1,820) 851 (1,875) 778 (1,715) 803 (1,770)
4ATkl
851
(1,875)
5MTk2 4ATA2
5MT 4AT
773 796 783 805
(1,705) (1,755) (1,725) (1,775)
IMPREZA
Specifications
J: WEIGHT
1. U.S. SPEC. VEHICLE
Sedan
Model I AWD I
I Turbo 2.0 L I 2.5 L I
I WRX I RS I
I Rear kgf(Ib) I 569 (1,255) I 569 (1,255) I 567 (1,250) I 567 (1,250) I
I Total kgf(Ib) I 1,395(3,075) 1 1,420 (3,130) I 1,345 (2,965) I 1,370(3,020) I
Front kgf(Ib) 1 998 (2,200) I 998 (2,200) I 939 (2,070) I 939 (2,070) I
Grossvehicleweight
(G.
V. W.) Rear kgf (Ib)
I 857 (1,890) I 857 (1,890) I 857 (1,890) I 857 (1,890) I
Total kgf(Ib) I 1,837(4,050) I 1,837 (4,050) I 1,778 (3,920) I 1,778 (3,920) I
A1 :Excl,udesweight of side air bag.
Wagon
Model
I AWD
I Turbo2.0 L I 2.5 L
I WRX I TS I OUTBACK
1 5MTA1
Curbweight
(C.W.)
Front
Rear
kgf (Ib) I (1,335) 606
605 603 606
60 1 603
(1,335)
1 (1,330)
1 (1,335)
I (1,325) 1 (1,330)
Total
kgf (Ib) I (3,155) 1,458 1,376 1,402 1,384 1,408
(3,210)
I (3,035) 1 (3,090)
I (3,050)
1 (3,105)
Grossvehicleweight
(G.V. W.)
998 939 939 939 939
(2,200)
1 (2,070)
1 (2,070)
1 (2,070) 1 (2,070)
(2,200)
Front
Rear 925 925 925 925 925
(2,040)
1 (2,040)
I (2,040)
[ (2,040) I (2,040)
Total 1,901 1,833 1,833 1,833 1,033
(4,109)
1 (4,040) 1 (4,040)
I (4,040) I (4,040)
A1 :Excludes weight of side air bag.
A2:Excludes weight
of ABS, cruisecontrol.
SPC-6

IMPREZA
Specifications
Model AWD
Turbo 2.0
L 2.5 L
2. CANADA SPEC. VEHICLE
I
I
WRX RS I
5MT 4AT 5MT 4AT
Curbweight (C.W.)
I Front kgf (Ib) 826 (1,820) 851 (1,875) 778 (1,715) 803 (1,770)
I I I I I
Grossvehicleweight 1 Front kgf (Ib) I 998 (2,200) I 998 (2,200) I 939 (2,070) I 939 (2,070)
Rear kgf
(Ib)
Total kgf (Ib)
(G.V. W.)
573 (1,265) 573 (1,265) 567 (1,250) 567 (1,250)
1,399 (3,085) 1,424 (3,140) 1,345 (2,965) 1,370 (3,020)
Rear kgf
(Ib)
Total kgf (Ib)
857 (1,890) 857 (1,890) 857 (1,890) 857 (1,890)
1,837(4,050) 1,837 (4,050) 1,778 (3,920) 1,778 (3,920)
SPC-7
Rear kgf (Ib)
Total kgf (Ib)
925 925 925 925 925 925
(2,040) (2,040) (2,040) (2,040) (2,040) (2,040)
1,901 1,901 1,833 1,833 1,833 1,833
(4,190) (4,190) (4,040) (4,040) (4,040) (4,040)

IMPREZA
SDecifications
MEMO
SPC-8

FU WHC)
FUEL INJECTION
(FUEL
SYSTEM)
1. General ................................................................................ 2
2. Air Line ................................................................................ 3
Page I
..
3. Fuel Line .................................. ..
4. Sensors and Switches . . ......................................................... 16
6. On-board DiagnosisSystem
....................................................... 34
5. Control System ................................ ................... 26

GENERAL
Fuel Injection (Fuel System)
1. General
0 The MultipointFuelInjection (MFI) systemsupplies optimumair-fuelmixtureundereveryengine
operating condition through the use of the latest electronic control technology.
This system pressurizesthe fuel to a constant pressureand injects it into each intakeair port in
the cylinder head. The injection quantity of fuel is controlled by an intermittent injection system
where anelectro-magneticinjectionvalve
or injectoropensfor ashort periodthat ispreciselycon-
trolled dependingonthe quantityof air appropriate for each condition of operation. Inactual con-
trol,an optimumfuel injectionquantityisachieved byvarying the durationof anelectric pulseap-
plied to the injector.This way of control enables simple, yet highly precise metering of the fuel.
0 The engine control module (ECM) that controlsthe fuel injectionsystemcorrects the fuel injec-
tion amountdepending onthevehicle speed,throttle opening,coolanttemperatureandotherve-
hicle-operation-related information.The
ECM receivesthe informationin the form of electric sig-
nalsfrom the corresponding sensors and switches.
The
MFI systemalso hasthe following features:
0 Reduced exhaust emissions
0 Reduced fuel consumption
0 Increased engine output
0 Quick responseto accelerator and brake pedal operation
Superiorstartabilityandwarm-up performance incoldweather due to corrective controlsmade
according
to coolant and intakeair temperatures
FU-2

AIR LINE Fuel
Injection (Fuel System)
2. Air Line
A: GENERAL
The air filtered bythe air cleaner enters thethrottle bodywhere it is regulated inthe volume bythe
throttle valve and then enters the intakemanifold. It is then distributed to each cylinder wherethe
air is mixed with fuel injected by the injector. During idling operation, air flows into the cylinder
through the idle air control solenoid valve, bypassing the throttle valve. This enables controlling
the engine idling speed properly.
B: INTAKE MANIFOLD PRESSUREAND AIR TEMPERATURESENSORS
The intake manifold pressuresensor and the intakeair temperature sensor are integrated into a
single unit.The unit
is mounted on the intakemanifoldand measuresthe absolute air pressurein
the intake manifold as well as the temperatureof the intakeair.
The measured pressure and temperature are converted into electrical signals and sent to the
ECM.The ECM usesthese signalsto control injectionand ignitiontiming as well as the fuel injec-
tion amount.
H2H2825B
(1) Pressuresensor
(2) Intakeair temperaturesensor
FU-3

I
Fuel Injection (Fuel System)
AIR LINE
C: ATMOSPHERIC PRESSURE SENSOR
The atmospheric pressuresensor converts pressurevalues into electric signals, and sends the
signals
to the ECM.
NF0007
(1) Sensor unit
(2) O-ring
(3) Case
(4) Pipe
(5) Throughcapacity
(6) Terminal
(7) Innerlead
(8) Resin
(9) Metallid
D: THROTTLE BODY
In responseto operation of the accelerator pedal,the throttle valve in the throttle body opens/
closes
to regulatethe volume of the air drawn intothe combustion chamber.
0 During idling, the throttle valve is almost fully closed and the volume of air passing throughthe
throttle body is less than that passing through the idle air control solenoid valve.
0 More than half of the air necessary for idling is supplied to the intake manifold via the idle air
controlsolenoidvalve which controls properlythe engine idlingspeed,
so the idlingspeed needs
not be adjusted.
FU-4