Subaru Legacy III (2000-2003 year). Service manual — part 83
LU(H4SO)-6
LUBRICATION
OIL PRESSURE SYSTEM
2. Oil Pressure System
A: SCHEMATIC
LU-00158
(GREEN)
i12
1 2 3
4 5 6
7 8 9 10 11 12 13 14
B21
(GRAY)
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
3
14
B5
5
i1
B36
E2
E11
B21
OIL PRESSURE
SWITCH
NO.5
IGNITION
RELAY
SMJ
COMBINATION
METER
i12
BATTERY
LU(H4SO)-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.
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.
3
CHECK COMBINATION METER.
1) Turn ignition switch to OFF.
2) Remove the combination meter.
3) Measure the resistance of the combination
meter.
Terminal
(i12) No. 3 — (i12) No. 14:
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.
LU(H4SO)-8
LUBRICATION
ENGINE OIL
3. Engine Oil
A: INSPECTION
1) Park vehicle on a level surface.
2) Remove oil level gauge and wipe it clean.
3) Reinsert the level gauge all the way. Be sure that
the level gauge is correctly inserted and in the
proper orientation.
4) Remove it again and note the reading. If the en-
gine oil level is below the “L” line, add oil to bring
the level up to the “F” line.
5) After turning off the engine, wait a few minutes
for the oil to drain back into the oil pan before
checking the level.
6) Just after driving or while the engine is warm, en-
gine oil level may show in the range between the
“F” line and the notch mark. This is caused by ther-
mal expansion of the engine oil.
7) To prevent overfilling the engine oil, do not add
oil above the “F” line when the engine is cold.
B: REPLACEMENT
1) Open engine oil filler cap for quick draining of the
engine oil.
2) Drain engine oil by loosening engine oil drain
plug.
3) Replace drain plug gasket.
4) Tighten engine oil drain plug after draining en-
gine oil.
Tightening torque:
44 N·m (4.5 kgf-m, 33 ft-lb)
5) Fill engine oil through filler pipe up to upper point
on level gauge. Make sure that vehicle is placed
level when checking oil level. Use engine oil of
proper quality and viscosity, selected in accor-
dance with the table in figure.
Recommended oil
API classification SL, SJ with the “Energy
Conserving” logo is printed (if you cannot
obtain the oil with SL, SJ or SH grades, you
may use SG, SF grades “ENERGY CON-
SERVING” oil.)
ACEA specification, A1, A2 or A3
CCMC specification, G4 or G5
New API certification mark (Star burse
mark) label is on the container.
Oil amount for preparation (when replacing en-
gine oil):
Approx. 4.0
2
(4.2 US qt, 3.5 Imp qt)
The proper viscosity helps vehicle get good cold
and hot starting by reducing viscous friction and
thus increasing cranking speed.
CAUTION:
When replenishing oil, it does not matter if the
oil to be added is a different brand from that in
the engine; however, use oil having the ILSAC
or API classification and SAE viscosity No. des-
ignated by SUBARU.
(A) Oil level gauge
(B) Engine oil filler cap
(C) Upper level
(D) Lower level
(E) Approx. 1.0
2
(1.1 US qt, 0.9 Imp qt)
LU-00138
(A)
(B)
(C)
(D)
(E)
LU-00094
LU-00094
LU-00008
SAE Viscosity No. and Applicable Temperature
(˚F)
0
40
30
15
–15
–20
–30
(˚C)
32
104
86
59
5
–4
–22
10W-30, 10W-40
5W-30 PREFERRED
LU(H4SO)-9
LUBRICATION
ENGINE OIL
NOTE:
If vehicle is used in desert areas with very high tem-
peratures or for other heavy duty applications, the
following viscosity oils may be used: API classifica-
tion: SL, SJ or SH
SAE Viscosity No.: 30, 40, 10W-50, 20W-40, 20W-
50.
6) Close engine oil filler cap.
7) Start engine and warm it up for a time.
8) After engine stops, recheck the oil level. If nec-
essary, add engine oil up to upper level on level
gauge.
(A) Oil level gauge
(B) Engine oil filler cap
(C) Upper level
(D) Lower level
(E) Approx. 1.0
2
(1.1 US qt, 0.9 Imp qt)
LU-00138
(A)
(B)
(C)
(D)
(E)
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