Subaru Legacy (2005 year). Manual - part 351

EN(H4DOTC)(diag)-173

ENGINE (DIAGNOSTICS)

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

Step

Check

Yes

No

1

CHECK HARNESS BETWEEN ECM AND OIL 
FLOW CONTROL SOLENOID VALVE.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from ECM and 
oil flow control solenoid valve.
3) Measure the resistance between ECM and 
oil flow control solenoid valve.

Connector & terminal

(B134) No. 20 — (E63) No. 1:
(B134) No. 30 — (E63) No. 2:

Is the resistance less than 1 
Ω?

Go to step 2.

Repair the open 
circuit of harness 
between ECM and 
oil flow control 
solenoid valve 
connector.

NOTE:
In this case, repair
the following:
• Open circuit of 
harness between 
ECM and oil flow 
control solenoid 
valve connector
• Poor contact in 
coupling connector

2

CHECK OIL FLOW CONTROL SOLENOID 
VALVE.
1) Disconnect the oil flow control solenoid 
valve connector.
2) Measure the resistance between oil flow 
control solenoid valve terminals.

Terminals

No. 1 — No. 2:

Is the resistance 6 — 12 

Ω?

Repair the poor 
contact in ECM 
and oil flow con-
trol solenoid valve.

Replace the oil 
flow control sole-
noid valve. <Ref. 
to ME(H4DOTC)-
56, Camshaft.>

EN(H4DOTC)(diag)-174

ENGINE (DIAGNOSTICS)

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

BH:DTC P2091 EXHAUST CAMSHAFT POSITION ACTUATOR CONTROL CIR-

CUIT HIGH (BANK 1)

DTC DETECTING CONDITION:
Immediately at fault recognition
TROUBLE SYMPTOM:
Erroneous idling

CAUTION:
After repair or replacement of faulty parts, perform Clear Memory Mode <Ref. to EN(H4DOTC)(diag)-
37, OPERATION, Clear Memory Mode.> and Inspection Mode <Ref. to EN(H4DOTC)(diag)-30, PROCE-
DURE, Inspection Mode.>.
WIRING DIAGRAM:

EN-01961

B21

E2

B134

E63

30

2

1

26

25

E63

B21

1 2

20

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

ECM

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

OIL FLOW CONTROL 

SOLENOID VALVE RH

EN(H4DOTC)(diag)-175

ENGINE (DIAGNOSTICS)

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

Step

Check

Yes

No

1

CHECK HARNESS BETWEEN ECM AND OIL 
FLOW CONTROL SOLENOID VALVE.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from ECM and 
oil flow control solenoid valve.
3) Measure the resistance between oil flow 
control solenoid valve and engine ground.

Connector & terminal

(E63) No. 1 — Engine ground:
(E63) No. 2 — Engine ground:

Is the resistance more than 1 
M

Ω?

Go to step 2.

Repair the short 
circuit between 
ECM and oil flow 
control solenoid 
valve connector.

2

CHECK OIL FLOW CONTROL SOLENOID 
VALVE.
1) Disconnect the oil flow control solenoid 
valve connector.
2) Measure the resistance between oil flow 
control solenoid valve terminals.

Terminals

No. 1 — No. 2:

Is the resistance 6 — 12 

Ω?

Repair the poor 
contact in ECM 
and oil flow con-
trol solenoid valve.

Replace the oil 
flow control sole-
noid valve. <Ref. 
to ME(H4DOTC)-
56, Camshaft.>

EN(H4DOTC)(diag)-176

ENGINE (DIAGNOSTICS)

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

BI: DTC P2092 INTAKE CAMSHAFT POSITION ACTUATOR CONTROL CIRCUIT 

LOW (BANK 2)

DTC DETECTING CONDITION:
Immediately at fault recognition
TROUBLE SYMPTOM:
Erroneous idling

CAUTION:
After repair or replacement of faulty parts, perform Clear Memory Mode <Ref. to EN(H4DOTC)(diag)-
37, OPERATION, Clear Memory Mode.> and Inspection Mode <Ref. to EN(H4DOTC)(diag)-30, PROCE-
DURE, Inspection Mode.>.
WIRING DIAGRAM:

EN-01962

B21

E2

B134

E37

29

2

1

28

27

E37

B21

1 2

19

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

ECM

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

OIL FLOW CONTROL 
SOLENOID VALVE LH