Subaru Legacy (2005 year). Manual - part 191

EN(H4SO 2.5)(diag)-49

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:
• EC, EK, EH, ER and K4 model

• KA and KS model

NOTE:
Fuel injection system for KA and KS model is the same as 2.0 L model. Refer to EN(H4SO 2.0) section.

BATTERY

3

B72

B75

B76

IGNITION
SWITCH

i10

COMBINATION
METER

B134

A:

SBF-6

6

A17

ECM

8

MAIN SBF

No.5

1

1

16

i3

B38

E

4

3

B137

D:

B21

E2

E

2

*

2

*

36

1

*

1

*

LHD WITH IMMOBILIZER : D15

LHD WITHOUT IMMOBILIZER : D14

: TERMINAL No. RANDOM ARRANGEMENT

2

*

B134

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

33 34

29

32

30 31

B137

5

6

7

8

2

1

9

4

3

10

22 23

11 12 13 14 15

24 25

26

16 17

18 19 20 21

27

28 29

30 31

A:

D:

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

14

18

1

5

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

1 2 3 4
5 6

8

B138

A

B122 : LHD

: RHD

B138

B122 : LHD

: RHD

RHD : D15

EN-03452

EN(H4SO 2.5)(diag)-50

ENGINE (DIAGNOSTICS)

Malfunction Indicator Light

Step

Check

Yes

No

1

CHECK OPTION CODE.

Is the option code EC, EK, EH, 
ER or K4?

Go to step 2.

Refer to EN(H4SO 
2.0) section. <Ref. 
to EN(H4SO 
2.0)(diag)-64, List 
of Diagnostic Trou-
ble Code (DTC).>

NOTE:
Fuel injection sys-
tem for KA and KS
model is the same
as 2.0 L model.

2

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?

Go to step 3.

Repair the mal-
function indictor 
light circuit. <Ref. 
to EN(H4SO 
2.5)(diag)-45, 
MALFUNCTION 
INDICATOR 
LIGHT DOES NOT 
COME ON, Mal-
function Indicator 
Light.>

3

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.

Go to step 4.

4

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?

Go to step 5.

Repair the har-
ness and connec-
tor.

NOTE:
In this case, repair
the following:
• Open circuit of 
harness between 
test mode connec-
tor and chassis 
ground

5

CHECK POOR CONTACT.
Check poor contact in ECM connector.

Is there poor contact in ECM 
connector?

Repair the poor 
contact in ECM 
connector.

Go to step 6.

6

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

RHD model

(B137) No. 15 — Chassis ground:

LHD model with immobilizer

(B137) No. 15 — Chassis ground:

LHD model without immobilizer

(B137) No. 14 — Chassis ground:

Is the resistance less than 1 
Ω?

Go to step 7.

Repair the open 
circuit of harness 
between ECM and 
test mode connec-
tor.

7

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 
2.5)-37, Engine 
Control Module 
(ECM).>

EN(H4SO 2.5)(diag)-51

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:
• EC, EK, EH, ER and K4 model

• KA and KS model

NOTE:
Fuel injection system for KA and KS model is the same as 2.0 L model. Refer to EN(H4SO 2.0) section.

BATTERY

3

B72

B75

B76

IGNITION
SWITCH

i10

COMBINATION
METER

B134

A:

SBF-6

6

A17

ECM

8

MAIN SBF

No.5

1

1

16

i3

B38

E

4

3

B137

D:

B21

E2

E

2

*

2

*

36

1

*

1

*

LHD WITH IMMOBILIZER : D15

LHD WITHOUT IMMOBILIZER : D14

: TERMINAL No. RANDOM ARRANGEMENT

2

*

B134

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

33 34

29

32

30 31

B137

5

6

7

8

2

1

9

4

3

10

22 23

11 12 13 14 15

24 25

26

16 17

18 19 20 21

27

28 29

30 31

A:

D:

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

14

18

1

5

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

1 2 3 4
5 6

8

B138

A

B122 : LHD

: RHD

B138

B122 : LHD

: RHD

RHD : D15

EN-03452

EN(H4SO 2.5)(diag)-52

ENGINE (DIAGNOSTICS)

Malfunction Indicator Light

Step

Check

Yes

No

1

CHECK OPTION CODE.

Is the option code EC, EK, EH, 
ER or K4?

Go to step 2.

Refer to EN(H4SO 
2.0) section. <Ref. 
to EN(H4SO 
2.0)(diag)-64, List 
of Diagnostic Trou-
ble Code (DTC).>

NOTE:
Fuel injection sys-
tem for KA and KS
model is the same
as 2.0 L model.

2

CHECK TEST MODE CONNECTOR.
1) Disconnect the test mode connectors.
2) Turn the ignition switch to ON.

Does the malfunction indicator 
light blink?

Go to step 3.

System is in good 
order.

NOTE:
Malfunction indica-
tor light blinks
when test mode
connector is con-
nected.

3

CHECK HARNESS BETWEEN ECM CON-
NECTOR AND CHASSIS GROUND TERMI-
NAL.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from ECM.
3) Measure the resistance of harness 
between ECM connector and chassis ground.

Connector & terminal

RHD model

(B137) No. 15 — Chassis ground:

LHD model with immobilizer

(B137) No. 15 — Chassis ground:

LHD model without immobilizer

(B137) No. 14 — Chassis ground:

Is the resistance less than 5 
Ω?

Repair the short 
circuit of harness 
between ECM and 
test mode connec-
tor.

Replace the ECM. 
<Ref. to FU(H4SO 
2.5)-37, Engine 
Control Module 
(ECM).>