Subaru Legacy III (2000-2003 year). Service manual - part 383

EN(H6DO)-334

ENGINE (DIAGNOSTICS)

GENERAL DIAGNOSTIC TABLE

MEMO:

FUJI HEAVY INDUSTRIES LTD.

G2300GE4

2003 LEGACY SERVICE MANUAL

QUICK REFERENCE INDEX

ENGINE SECTION 3

This service manual has been prepared
to provide SUBARU service personnel
with the necessary information and data
for the correct maintenance and repair
of SUBARU vehicles.
This manual includes the procedures
for maintenance, disassembling, reas-
sembling, inspection and adjustment of
components and diagnostics for guid-
ance of experienced mechanics.
Please peruse and utilize this manual
fully to ensure complete repair work for
satisfying our customers by keeping
their vehicle in optimum condition.
When replacement of parts during
repair work is needed, be sure to use
SUBARU genuine parts.

All information, illustration and specifi-
cations contained in this manual are
based on the latest product information
available at the time of publication
approval.

FUEL INJECTION (FUEL SYSTEMS)

FU(H4DOSTC)

EMISSION CONTROL 
(AUX. EMISSION CONTROL DEVICES)

EC(H4DOSTC)

INTAKE (INDUCTION)

IN(H4DOSTC)

MECHANICAL

ME(H4DOSTC)

EXHAUST

EX(H4DOSTC)

COOLING

CO(H4DOSTC)

LUBRICATION

LU(H4DOSTC)

SPEED CONTROL SYSTEMS

SP(H4DOSTC)

IGNITION

IG(H4DOSTC)

STARTING/CHARGING SYSTEMS

SC(H4DOSTC)

ENGINE (DIAGNOSTICS)

EN(H4DOSTC)

FUEL INJECTION (FUEL SYSTEMS)

FU(H4DOSTC)

Page

1.

General Description ....................................................................................2

2.

Throttle Body .............................................................................................14

3.

Intake Manifold..........................................................................................15

4.

Engine Coolant Temperature Sensor........................................................28

5.

Crankshaft Position Sensor.......................................................................29

6.

Camshaft Position Sensor.........................................................................30

7.

Knock Sensor............................................................................................31

8.

Throttle Position Sensor............................................................................32

9.

Mass Air Flow and Intake Air Temperature Sensor ..................................33

10.

Pressure Sensor .......................................................................................34

11.

Idle Air Control Solenoid Valve .................................................................35

12.

Fuel Injector ..............................................................................................36

13.

Front Oxygen (A/F) Sensor .......................................................................38

14.

Rear Oxygen Sensor.................................................................................39

15.

Engine Control Module..............................................................................40

16.

Main Relay ................................................................................................41

17.

Fuel Pump Relay.......................................................................................42

18.

Fuel Pump Controller ................................................................................43

19.

Fuel ...........................................................................................................44

20.

Fuel Tank ..................................................................................................47

21.

Fuel Filler Pipe ..........................................................................................55

22.

Fuel Pump.................................................................................................59

23.

Fuel Level Sensor .....................................................................................61

24.

Fuel Sub Level Sensor ..............................................................................62

25.

Fuel Filter ..................................................................................................64

26.

Fuel Cut Valve...........................................................................................65

27.

Fuel Damper Valve ...................................................................................66

28.

Fuel Delivery, Return and Evaporation Lines............................................67

29.

Fuel System Trouble in General ...............................................................70