Subaru Legacy IV (2008 year). Service manual — part 371

EN(H4DOTC)(diag)-305

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

ENGINE (DIAGNOSTICS)

DL:DTC P2089 INTAKE CAMSHAFT POSITION ACTUATOR CONTROL CIRCUIT

HIGH (BANK 1)

DTC DETECTING CONDITION:
• Immediately at fault recognition
• GENERAL DESCRIPTION <Ref. to GD(H4DOTC)-200, DTC P2089 INTAKE CAMSHAFT POSITION AC-
TUATOR CONTROL CIRCUIT HIGH (BANK 1), Diagnostic Trouble Code (DTC) Detecting Criteria.>
TROUBLE SYMPTOM:
Improper idling

CAUTION:
After repair or replacement of faulty parts, perform Clear Memory Mode <Ref. to EN(H4DOTC)(diag)-
52, OPERATION, Clear Memory Mode.>, and Inspection Mode <Ref. to EN(H4DOTC)(diag)-43, PRO-
CEDURE, Inspection Mode.>.
WIRING DIAGRAM:

EN-05688

B21

E2

B137

E38

16

2

1

22

21

E38

B21

1 2

17

B137

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

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

ECM

OIL FLOW CONTROL SOLENOID VALVE RH

EN(H4DOTC)(diag)-306

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

ENGINE (DIAGNOSTICS)

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 voltage between ECM and
chassis ground.

Connector & terminal

(B137) No. 17 (+) — Chassis ground (–):
(B137) No. 16 (+) — Chassis ground (–):

Is the voltage less than 1 V?

Go to step 2.

Repair the short
circuit to power in
harness between
ECM and oil flow
control solenoid
valve connector.

2

CHECK HARNESS BETWEEN ECM AND OIL
FLOW CONTROL SOLENOID VALVE.
Measure the resistance of harness between
ECM and oil flow control solenoid valve connec-
tor.

Connector & terminal

(B137) No. 17 — (E38) No. 1:
(B137) No. 16 — (E38) No. 2:

Is the resistance less than 1

:? Go to step 3.

Repair the harness
and connector.

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

3

CHECK OIL FLOW CONTROL SOLENOID
VALVE.
Measure the resistance between oil flow control
solenoid valve terminals.

Terminals

No. 1 — No. 2:

Is the resistance between 6 —
12

:?

Repair the poor
contact of ECM
and oil flow control
solenoid valve con-
nector.

Replace the oil
flow control sole-
noid valve. <Ref. to
ME(H4DOTC)-58,
Camshaft.>

EN(H4DOTC)(diag)-307

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

ENGINE (DIAGNOSTICS)

DM:DTC P2092 INTAKE CAMSHAFT POSITION ACTUATOR CONTROL CIRCUIT

LOW (BANK 2)

DTC DETECTING CONDITION:
• Immediately at fault recognition
• GENERAL DESCRIPTION <Ref. to GD(H4DOTC)-201, DTC P2092 INTAKE CAMSHAFT POSITION AC-
TUATOR CONTROL CIRCUIT LOW (BANK 2), Diagnostic Trouble Code (DTC) Detecting Criteria.>
TROUBLE SYMPTOM:
Improper idling

CAUTION:
After repair or replacement of faulty parts, perform Clear Memory Mode <Ref. to EN(H4DOTC)(diag)-
52, OPERATION, Clear Memory Mode.>, and Inspection Mode <Ref. to EN(H4DOTC)(diag)-43, PRO-
CEDURE, Inspection Mode.>.
WIRING DIAGRAM:

EN-05689

B21

E2

B137

E37

14

2

1

33

32

E37

B21

1 2

15

B137

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

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

ECM

OIL FLOW CONTROL SOLENOID VALVE LH

EN(H4DOTC)(diag)-308

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

ENGINE (DIAGNOSTICS)

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 of harness between
ECM and oil flow control solenoid valve.

Connector & terminal

(B137) No. 15 — (E37) No. 1:
(B137) No. 14 — (E37) No. 2:

Is the resistance less than 1

:? Go to step 2.

Repair the harness
and connector.

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

2

CHECK HARNESS BETWEEN ECM AND OIL
FLOW CONTROL SOLENOID VALVE.
Measure the resistance between ECM and
chassis ground.

Connector & terminal

(B137) No. 15 — Chassis ground:
(B137) No. 14 — Chassis ground:

Is the resistance 1 M

: or

more?

Go to step 3.

Repair the short
circuit to ground in
harness between
ECM and oil flow
control solenoid
valve connector.

3

CHECK OIL FLOW CONTROL SOLENOID
VALVE.
Measure the resistance between oil flow control
solenoid valve terminals.

Terminals

No. 1 — No. 2:

Is the resistance between 6 —
12

:?

Repair the poor
contact of ECM
and oil flow control
solenoid valve con-
nector.

Replace the oil
flow control sole-
noid valve. <Ref. to
ME(H4DOTC)-58,
Camshaft.>