Subaru Legacy IV (2008 year). Service manual - part 522

EN(H6DO)(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 COMBINA-
TION METER AND ECM 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 combina-
tion meter and 
ECM connector.

Replace the ECM. 
<Ref. to 
FU(H6DO)-38, 
Engine Control 
Module (ECM).>

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

2

1

3 4

6 7 8 9

22

21

20

19

18

17

16

15

14

13

12

11

5

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

3

1

B72

BATTERY

E

No.5

i10

3

i3

B38

8

16

B136

11

ECM

B72

B136

i10

B38

10

EN-05649

IGNITION

SWITCH

COMBINATION  
METER

EN(H6DO)(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:

3

B72

B75

B76

i10

B135

B:

SBF-6

1

C11

C6

B27

ECM

B72

8

MAIN SBF

No.5

*

1

1

B75

1
2

1
2

16

i3

B38

E

3

B136

C:

B135

B136

B:

C:

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

*

*

 : TERMINAL No. OPTIONAL
   ARRANGEMENT

B122

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

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-05650

DELIVERY (TEST) MODE CONNECTOR

BATTERY

IGNITION

SWITCH

COMBINATION  
METER

EN(H6DO)(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(H6DO)(diag)-
59, MALFUNC-
TION 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 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 
combination meter 
and ECM connec-
tor.

Go to step 3.

3

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

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(H6DO)-38, 
Engine Control 
Module (ECM).>

EN(H6DO)(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:

3

B72

B75

B76

i10

B135

B:

SBF-6

1

C11

C6

B27

ECM

B72

8

MAIN SBF

No.5

*

1

1

B75

1
2

1
2

16

i3

B38

E

3

B136

C:

B135

B136

B:

C:

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

*

*

 : TERMINAL No. OPTIONAL
   ARRANGEMENT

B122

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

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-05650

DELIVERY (TEST) MODE CONNECTOR

BATTERY

IGNITION

SWITCH

COMBINATION  
METER