Subaru Legacy IV (2008 year). Manual - part 310

EN(H4DOTC)(diag)-61

Malfunction Indicator Light

ENGINE (DIAGNOSTICS)

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 ECM AND 
COMBINATION METER CONNECTOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from ECM.
3) Turn the ignition switch to ON.

Does the malfunction indicator 
light illuminate?

Repair the short 
circuit of harness 
between ECM and 
combination meter 
connector.

Replace the ECM. 
<Ref. to 
FU(H4DOTC)-52, 
Engine Control 
Module (ECM).>

EN-05122

SBF-6

MAIN SBF

No.5

B72

B38

B136

ECM

i3

E

3

11

i10

3

16

8

B72

i10

B38

COMBINATION
METER

IGNITION SWITCH

BATTERY

B136

2

1

3 4

6 7 8 9 10

22

21

20

19

18

17

16

15

14

13

12

11

5

1

3

4 5 6

2

1 2 3 4

5 6 7 8 9

10 11 12 13 14 15 16 17 18 19 20

1

16

10 11 12 13 14 15

25

24

30

9

8

7

17 18 19 20
28

21 22 23

29

32

31

1

2

3

4

5

6

27

26

33 34 35

EN(H4DOTC)(diag)-62

Malfunction Indicator Light

ENGINE (DIAGNOSTICS)

E: MALFUNCTION INDICATOR LIGHT DOES NOT BLINK

DIAGNOSIS:
• The malfunction indicator light circuit is open or shorted.
• The delivery (test) mode connector circuit is open.
TROUBLE SYMPTOM:
Malfunction indicator light does not blink during Inspection Mode.
WIRING DIAGRAM:

EN-05664

16

10 11 12 13 14 15

25

24

30

9

8

7

17 18 19 20
28

21 22 23

29

32

31

1

2

3

4

5

6

27

26

33 34 35

SBF-6

MAIN SBF

No.5

B72

B38

B135

B136

ECM

i3

E

1

1

C11

B27

i10

B:

C:

B72

B75

i10

B136

1
2

1
2

1
2

1
2

C:

B135

B38

B:

3

16

8

*

*

C6

B122

1

3

4 5 6

2

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 9

10 11 12 13 14 15 16 17 18 19 20

1 2 3 4
5 6 7 8

B122

B76

B75

B76

*

3

1

5

6

7

2

1

3

4

29

10 11 12 13 14 15

25

24

16

30

9

8

17 18 19

20
28

21 22 23

32

31

26 27

33

34 35

COMBINATION 
METER

IGNITION
SWITCH

BATTERY

: TERMINAL No. OPTIONAL 
  ARRANGEMENT

DELIVERY (TEST) MODE CONNECTOR

EN(H4DOTC)(diag)-63

Malfunction Indicator Light

ENGINE (DIAGNOSTICS)

Step

Check

Yes

No

1

CHECK STATUS OF MALFUNCTION INDI-
CATOR LIGHT.
1) Turn the ignition switch to OFF.
2) Disconnect the delivery (test) mode connec-
tor.
3) Turn the ignition switch to ON. (engine OFF)

Does the malfunction indicator 
light illuminate?

Go to step 2.

Repair the mal-
function indicator 
light circuit. <Ref. 
to
EN(H4DOTC)(diag)
-59, MALFUNC-
TION INDICATOR 
LIGHT DOES NOT 
COME ON, Mal-
function Indicator 
Light.>

2

CHECK HARNESS BETWEEN ECM AND 
COMBINATION METER CONNECTOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from ECM.
3) Turn the ignition switch to ON.

Does the malfunction indicator 
light illuminate?

Repair the ground 
short circuit of har-
ness between 
ECM and combi-
nation meter con-
nector.

Go to step 3.

3

CHECK HARNESS BETWEEN ECM AND DE-
LIVERY (TEST) MODE CONNECTOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from ECM.
3) Measure the resistance of harness between 
ECM and delivery (test) mode connector.

Connector & terminal

(B76) No. 1 — (B136) No. 6:
(B75) No. 1 — (B135) No. 27:

Is the resistance less than 1 

:? Go to step 4.

Repair the harness 
and connector.

NOTE:
In this case, repair
the following item:
• Open circuit of
harness between
ECM and delivery
(test) mode con-
nector
• Poor contact in
joint connector

4

CHECK POOR CONTACT.
Check for poor contact of the ECM connector.

Is there poor contact in ECM 
connector?

Repair the poor 
contact of ECM 
connector.

Replace the ECM. 
<Ref. to 
FU(H4DOTC)-52, 
Engine Control 
Module (ECM).>

EN(H4DOTC)(diag)-64

Malfunction Indicator Light

ENGINE (DIAGNOSTICS)

F: MALFUNCTION INDICATOR LIGHT REMAINS BLINKING

DIAGNOSIS:
The delivery (test) mode connector circuit is shorted.
TROUBLE SYMPTOM:
Malfunction indicator light blinks when delivery (test) mode connector is not connected.
WIRING DIAGRAM:

EN-05664

16

10 11 12 13 14 15

25

24

30

9

8

7

17 18 19 20
28

21 22 23

29

32

31

1

2

3

4

5

6

27

26

33 34 35

SBF-6

MAIN SBF

No.5

B72

B38

B135

B136

ECM

i3

E

1

1

C11

B27

i10

B:

C:

B72

B75

i10

B136

1
2

1
2

1
2

1
2

C:

B135

B38

B:

3

16

8

*

*

C6

B122

1

3

4 5 6

2

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 9

10 11 12 13 14 15 16 17 18 19 20

1 2 3 4
5 6 7 8

B122

B76

B75

B76

*

3

1

5

6

7

2

1

3

4

29

10 11 12 13 14 15

25

24

16

30

9

8

17 18 19

20
28

21 22 23

32

31

26 27

33

34 35

COMBINATION 
METER

IGNITION
SWITCH

BATTERY

: TERMINAL No. OPTIONAL 
  ARRANGEMENT

DELIVERY (TEST) MODE CONNECTOR