Subaru Legacy (2005 year). Service manual — part 114
EN(H4SO 2.0)(diag)-45
ENGINE (DIAGNOSTICS)
Malfunction Indicator Light
D: MALFUNCTION INDICATOR LIGHT DOES NOT GO OFF.
DIAGNOSIS:
The malfunction indicator light circuit is shorted.
TROUBLE SYMPTOM:
Although malfunction indicator light comes on when the engine runs, DTC is not shown on the Subaru Select
Monitor display.
WIRING DIAGRAM:
Step
Check
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 malfunction indicator
light illuminate?
Repair the short
circuit of harness
between combina-
tion meter and
ECM connector.
Replace the ECM.
<Ref. to FU(H4SO
2.0)-34, Engine
Control Module
(ECM).>
EN-03469
BATTERY
3
B72
i3
B38
B135
IGNITION
SWITCH
COMBINATION
METER
i10
SBF-6
6
15
ECM
4
8
MAIN SBF
No.5
16
E
3
B72
1
3
4 5 6
2
B38
1 2 3 4
5 6 7 8 9
10 11 12 13 14 15 16 17 18 19 20
i10
2
1
3 4
6 7 8 9 10
22
21
20
19
18
17
16
15
14
13
12
11
5
B135
8
1
28
20
5
6
7
2
9
4
3
10
24
22 23
25
11 12 13 14 15
26 27
16 17 18 19
21
29 30 31
32 33
34 35
EN(H4SO 2.0)(diag)-46
ENGINE (DIAGNOSTICS)
Malfunction Indicator Light
E: MALFUNCTION INDICATOR LIGHT DOES NOT BLINK.
DIAGNOSIS:
• The malfunction indicator light circuit is open or shorted.
• Test mode connector circuit is open.
TROUBLE SYMPTOM:
Malfunction indicator light does not blink during inspection mode.
WIRING DIAGRAM:
EN-03470
BATTERY
3
B72
B75
B76
IGNITION
SWITCH
i10
COMBINATION
METER
B135
B:
6
B15
B24
ECM
B72
8
No.5
1
1
B75
1
2
1
2
16
i3
B38
E
4
3
1
3
4 5 6
2
i10
B38
1 2 3 4
5 6 7 8 9
10 11 12 13 14 15 16 17 18 19 20
2
1
3 4
6 7 8 9 10
22
21
20
19
18
17
16
15
14
13
12
11
5
1 2 3 4
5 6 7 8
B122
E
B21
E2
36
B135
5
6
7
8
2
1
9
4
3
10
24
22 23
25
11 12 13 14 15
26 27
28
16 17 18 19
20 21
29 30 31
32 33
34 35
B:
B21
1 2 3 4
12 13 14 15
5 6 7 8
16 17 18 19
9 10 11
20 21 22
23 24 25 26 27 28 29 30 31 32 33
35
34
37
36
39
38
41
40
43
42
44
45
47
46
49
48
51
50
53
52
54
B83
*
*
MAIN SBF
SBF-6
: TERMINAL No. RANDOM ARRANGEMENT
*
B83
B122 : LHD
: RHD
EN(H4SO 2.0)(diag)-47
ENGINE (DIAGNOSTICS)
Malfunction Indicator Light
Step
Check
Yes
No
1
CHECK STATUS OF MALFUNCTION INDI-
CATOR LIGHT.
1) Turn the ignition switch to OFF.
2) Disconnect the test mode connectors.
3) Turn the ignition switch to ON. (engine
OFF)
Does the malfunction indicator
light illuminate?
Repair the mal-
function indictor
light circuit. <Ref.
to EN(H4SO
2.0)(diag)-43,
MALFUNCTION
INDICATOR
LIGHT DOES NOT
COME ON, Mal-
function Indicator
Light.>
2
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 malfunction indicator
light illuminate?
Repair the short
circuit of harness
between combina-
tion meter and
ECM connector.
3
CHECK HARNESS BETWEEN TEST MODE
CONNECTOR AND CHASSIS GROUND.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from ECM.
3) Measure the resistance of harness
between test mode connector and chassis
ground.
Connector & terminal
(B76) No. 1 — Chassis ground:
Is the resistance less than 1
Ω?
Repair the har-
ness and connec-
tor.
NOTE:
In this case, repair
the following item:
• Open circuit of
harness between
test mode connec-
tor and chassis
ground
4
CHECK POOR CONTACT.
Check poor contact in ECM connector.
Is there poor contact in ECM
connector?
Repair the poor
contact in ECM
connector.
5
CHECK HARNESS BETWEEN ECM AND
TEST MODE CONNECTOR.
1) Connect the test mode connector.
2) Measure the resistance of harness
between ECM and chassis ground.
Connector & terminal
(B135) No. 24 — Chassis ground:
Is the resistance less than 1
Ω?
Repair the open
circuit of harness
between ECM and
test mode connec-
tor.
6
CHECK POOR CONTACT.
Check poor contact in ECM connector.
Is there poor contact in ECM
connector?
Repair the poor
contact in ECM
connector.
Replace the ECM.
<Ref. to FU(H4SO
2.0)-34, Engine
Control Module
(ECM).>
EN(H4SO 2.0)(diag)-48
ENGINE (DIAGNOSTICS)
Malfunction Indicator Light
F: MALFUNCTION INDICATOR LIGHT REMAINS BLINKING.
DIAGNOSIS:
Test mode connector circuit is shorted.
TROUBLE SYMPTOM:
Malfunction indicator light blinks when test mode connector is not connected.
WIRING DIAGRAM:
Step
Check
Yes
No
1
CHECK TEST MODE CONNECTOR.
1) Disconnect the test mode connectors.
2) Turn the ignition switch to ON.
Does the malfunction indicator
light blink?
System is normal.
NOTE:
Malfunction indica-
tor light blinks at a
cycle of 3 Hz when
test mode connec-
tor is connected.
EN-03470
BATTERY
3
B72
B75
B76
IGNITION
SWITCH
i10
COMBINATION
METER
B135
B:
6
B15
B24
ECM
B72
8
No.5
1
1
B75
1
2
1
2
16
i3
B38
E
4
3
1
3
4 5 6
2
i10
B38
1 2 3 4
5 6 7 8 9
10 11 12 13 14 15 16 17 18 19 20
2
1
3 4
6 7 8 9 10
22
21
20
19
18
17
16
15
14
13
12
11
5
1 2 3 4
5 6 7 8
B122
E
B21
E2
36
B135
5
6
7
8
2
1
9
4
3
10
24
22 23
25
11 12 13 14 15
26 27
28
16 17 18 19
20 21
29 30 31
32 33
34 35
B:
B21
1 2 3 4
12 13 14 15
5 6 7 8
16 17 18 19
9 10 11
20 21 22
23 24 25 26 27 28 29 30 31 32 33
35
34
37
36
39
38
41
40
43
42
44
45
47
46
49
48
51
50
53
52
54
B83
*
*
MAIN SBF
SBF-6
: TERMINAL No. RANDOM ARRANGEMENT
*
B83
B122 : LHD
: RHD
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