Subaru Legacy IV (2008 year). Manual — part 114

EN(H4SO)(diag)-59

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(H4SO)-39,
Engine Control
Module (ECM).>

EN-05697

3

B72

i3

B38

B136

i10

SBF-6

1

11

3

B72

8

MAIN SBF

No.5

16

E

1

3

4 5 6

2

B136

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

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

ECM

COMBINATION
METER

IGNITION
SWITCH

BATTERY

EN(H4SO)(diag)-60

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-05698

i10

16

3

B135

B:

8

i3

B38

B75

B76

1

1

B136

C:

E

3

B72

SBF-6

1

MAIN SBF

No.5

B135

B136

B:

C:

B72

B75

2

1

3

4

6

2

i10

B38

1 2 3 4

5 6 7 8 9

10 11 12 13

15 16 17

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

8

B122

14

18

7

1

5

C11

C6

B122

B27

*

*

*

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

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

IGNITION
SWITCH

BATTERY

COMBINATION
METER

ECM

: TERMINAL No. OPTIONAL
ARRANGEMENT

DELIVERY (TEST)
MODE CONNECTOR

EN(H4SO)(diag)-61

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(H4SO)(diag)-
57, 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 short
circuit of harness
between ECM and
combination meter
connector.

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(H4SO)-39,
Engine Control
Module (ECM).>

EN(H4SO)(diag)-62

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-05698

i10

16

3

B135

B:

8

i3

B38

B75

B76

1

1

B136

C:

E

3

B72

SBF-6

1

MAIN SBF

No.5

B135

B136

B:

C:

B72

B75

2

1

3

4

6

2

i10

B38

1 2 3 4

5 6 7 8 9

10 11 12 13

15 16 17

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

8

B122

14

18

7

1

5

C11

C6

B122

B27

*

*

*

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

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

IGNITION
SWITCH

BATTERY

COMBINATION
METER

ECM

: TERMINAL No. OPTIONAL
ARRANGEMENT

DELIVERY (TEST)
MODE CONNECTOR