Subaru Legacy III (2000-2003 year). Manual - part 446

LU(H4DOSTC)-4

LUBRICATION

GENERAL DESCRIPTION

C: CAUTION

• Wear working clothing, including a cap, protec-
tive goggles, and protective shoes during opera-
tion.
• Remove dirt and corrosion before removal, in-
stallation or disassembly.
• Keep the disassembled parts in order and pro-
tect them from dust or dirt.
• Before removal, installation or disassembly, be
sure to clarify the failure. Avoid unnecessary re-
moval, installation, disassembly, and replacement.
• Be careful not to burn your hands, because each
part in the vehicle is hot after running.
• Be sure to tighten fasteners including bolts and
nuts to the specified torque.
• Place shop jacks or safety stands at the specified
points.
• Before disconnecting electrical connectors of
sensors or units, be sure to disconnect ground ca-
ble from battery.

LU(H4DOSTC)-5

LUBRICATION

GENERAL DESCRIPTION

D: PREPARATION TOOL

ILLUSTRATION

TOOL NUMBER

DESCRIPTION

REMARKS

499977100

 (MT model)

CRANKSHAFT 
PULLEY 
WRENCH

Used for stopping rotation of crankshaft pulley 
when loosening and tightening crankshaft pulley 
bolt. 

499977400
(AT model)

CRANKSHAFT 
PULLEY 
WRENCH

Used for stopping rotation of crankshaft pulley 
when loosening and tightening crankshaft pulley 
bolt. 

498547000

OIL FILTER 
WRENCH

Used for removing and installing oil filter.

499587100

OIL SEAL 
INSTALLER

Used for installing oil pump oil seal.

ST-499977100

ST-499977400

ST-498547000

ST-499587100

LU(H4DOSTC)-6

LUBRICATION

OIL PRESSURE SYSTEM

2. Oil Pressure System

A: SCHEMATIC

LU-00150

B21

1 2

3 4

5

6 7

8

9 10

11 12

13

14 15

16

17 18

19 20

B36

B4 B5 B6

A4 A5 A6

C5 C6

F6

D4 D5 D6

F1

H1

C4

G6

G1

C2

K1

M1 M2

K6

L1

D1 D2

A1 A2
B1 B2

I6

J6

L2

I1

J1

H6

M4 M5 M6

L4 L5 L6 

N5 N6

O4 O5 O6

N4

P4 P5

N2

O1 O2

P1 P2

N3

O3

P3

P6

A3

B3

C3

E4 E5 E6

E1 E2

OIL PRESSURE

W

ARNING LIGHT

B5

B8

B5

14

i1

B36

E2

E11

B21

OIL PRESSURE

SWITCH

NO.5

IGNITION

RELAY

SMJ

COMBINATION

METER

i10

A:

i11

B:

BATTERY

A8

i11

1 2 3
8 9 10

4

11 12 13 14 15 16

5 6 7

i10

1 2 3 4 5 6 7

8 9 10 11 12 13 14

15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

LU(H4DOSTC)-7

LUBRICATION

OIL PRESSURE SYSTEM

B: INSPECTION

Step

Value

Yes

No

1

CHECK COMBINATION METER.
1) Turn ignition switch to ON. (engine OFF)
2) Check other warning lights.

Does the warning lights go on?

Warning light goes on.

Go to step 2.

Repair or replace 
the combination 
meter. <Ref. to 
IDI-4, INSPEC-
TION, Combina-
tion Meter 
System.>

2

CHECK HARNESS CONNECTOR BETWEEN 
COMBINATION METER AND OIL PRES-
SURE SWITCH.
1) Turn ignition switch to OFF.
2) Disconnect connector from the oil pressure 

switch.

3) Turn ignition switch ON.
4) Measure the voltage of harness between 

the combination meter connector and chas-
sis ground.

Connector & terminal

(E11) No. 1 — Chassis ground:

Does the measured value exceed the spec-
ified value?

10 V

Replace oil pres-
sure switch.

Go to step 3.

3

CHECK COMBINATION METER.
1) Turn ignition switch to OFF.
2) Remove the combination meter.
3) Measure the resistance of the combination 

meter.

Terminal

 No. A8 — No. B8:
 No. B5 — No. B8:

Is the measured value less than the speci-
fied value?

10 

Ω

Replace the har-
ness connector 
between combina-
tion meter and oil 
pressure switch.

Repair or replace 
the combination 
meter and the oil 
pressure switch 
warning light bulb.