Subaru Legacy III (2000-2003 year). Service manual — part 468
EN(H4DOSTC)-42
ENGINE (DIAGNOSTICS)
ENGINE MALFUNCTION INDICATOR LAMP (MI)
6
CHECK HARNESS BETWEEN COMBINA-
TION METER AND IGNITION SWITCH CON-
NECTOR.
1) Turn the ignition switch to ON.
2) Measure the voltage between combination
meter connector and chassis ground.
Connector & terminal
(i10) No. 8 (+) — Chassis ground (
−−−−
):
(i11) No. 5 (+) — Chassis ground (
−−−−
):
Does the measured value exceed the spec-
ified value?
10 V
Check the follow-
ing and repair if
necessary.
NOTE:
• Broken down
ignition relay.
• Blown out fuse
(No. 5).
• If replaced fuse
(No. 5) blows eas-
ily, check the har-
ness for short
circuit of harness
between fuse (No.
5) and ignition
relay connector.
• Open or short
circuit in harness
between fuse (No.
5) and battery ter-
minal
• Open circuit in
harness between
fuse (No. 5) and
ignition relay con-
nector
• Poor contact in
ignition relay con-
nector
• Poor contact in
ignition switch
connector
7
CHECK LAMP BULB.
Remove the engine malfunction indicator lamp
bulb.
Is the lamp bulb condition OK?
OK
Repair the combi-
nation meter con-
nector.
Replace the lamp
bulb.
Step
Value
Yes
No
EN(H4DOSTC)-43
ENGINE (DIAGNOSTICS)
ENGINE MALFUNCTION INDICATOR LAMP (MI)
MEMO:
EN(H4DOSTC)-44
ENGINE (DIAGNOSTICS)
ENGINE MALFUNCTION INDICATOR LAMP (MI)
D: CHECK ENGINE MALFUNCTION INDICATOR LAMP (MI) DOES NOT GO
OFF.
• DIAGNOSIS:
• The CHECK ENGINE malfunction indicator lamp (MI) circuit is shorted.
• TROUBLE SYMPTOM:
• Although MI comes on when the engine runs, trouble code is not shown on the Subaru select monitor
or OBD-II general scan tool display.
• WIRING DIAGRAM:
Step
Value
Yes
No
1
CHECK HARNESS BETWEEN COMBINA-
TION METER AND ECM CONNECTOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from ECM.
3) Turn the ignition switch to ON.
Does the MI come on?
MI illuminates.
Repair the short
circuit in harness
between combina-
tion meter and
ECM connector.
Replace the ECM.
<Ref. to
FU(H4DOSTC)-
40, Engine Con-
trol Module.>
EN-00928
BATTERY
IGNITION
SWITCH
IGNITION
RELAY
SBF-4
SBF-1
No.5
B72
B72
B36
B137
B157
ECM
i1
E
E
1
4
37
34
36
38
15
i10
A :
i11
B :
i11
i10
B137
B157
B5
B10
COMBINATION
METER
3 4
1 2
1
2
7
8
9
5
6
3
4
10 11 12
19 20 21
29 30 31
13 14 15 16 17
27 28
18
22 23 24 25 26
10
11 12 13
14 15 16
17
18
19
20
21 22 23
24 25 26
27
28
29
30
31 32 33
34 35 36
37
38
1
2
9
3
4
5
6
7
8
A4
A8
1 2 3
8 9 10
4
11 12 13 14 15 16
5 6 7
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
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
EN(H4DOSTC)-45
ENGINE (DIAGNOSTICS)
ENGINE MALFUNCTION INDICATOR LAMP (MI)
MEMO:
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