Subaru Legacy (2005 year). Service manual — part 350

EN(H4DOTC)(diag)-169

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. 18 — (E38) No. 1:
(B134) No. 28 — (E38) 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)-170

ENGINE (DIAGNOSTICS)

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

BF:DTC P2089 INTAKE CAMSHAFT POSITION ACTUATOR CONTROL CIRCUIT

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-01960

B21

E2

B134

E38

28

2

1

24

23

E38

B21

1 2

18

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

OIL FLOW CONTROL

SOLENOID VALVE RH

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

EN(H4DOTC)(diag)-171

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

(E38) No. 1 — Engine ground:
(E38) 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)-172

ENGINE (DIAGNOSTICS)

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

BG:DTC P2090 EXHAUST CAMSHAFT POSITION ACTUATOR CONTROL CIR-

CUIT LOW (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