Subaru Legacy (2005 year). Manual - part 448

EN(H6DO)(diag)-105

ENGINE (DIAGNOSTICS)

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

Step

Check

Yes

No

1

CHECK HARNESS BETWEEN ECM AND OIL 
SWITCHING SOLENOID VALVE.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from ECM and oil 
switching solenoid valve.
3) Measure the resistance between oil switch-
ing solenoid valve and engine ground.

Connector & terminal

(E69) No. 1 — Engine ground:
(E69) No. 2 — Engine ground:

Is the resistance more than 1 
M

Ω?

Go to step 2.

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

2

CHECK OIL SWITCHING SOLENOID VALVE.
1) Remove the oil switching solenoid valve 
connector.
2) Measure the resistance between oil switch-
ing solenoid valve terminals.

Terminal

No. 1 — No. 2:

Is the resistance 6 — 12 

Ω

Repair the poor 
contact in ECM 
and oil switching 
solenoid valve.

Replace the oil 
switching solenoid 
valve. <Ref. to 
ME(H6DO)-80, Oil 
Switching Sole-
noid Valve.>

EN(H6DO)(diag)-106

ENGINE (DIAGNOSTICS)

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

Q: DTC P0082 INTAKE VALVE CONTROL SOLENOID CIRCUIT LOW (BANK 2)

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

CAUTION:
After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H6DO)(diag)-41, 
OPERATION, Clear Memory Mode.> and Inspection Mode <Ref. to EN(H6DO)(diag)-34, PROCEDURE, 
Inspection Mode.>.
WIRING DIAGRAM:

EN-02498

B21

E2

B135

E70

24

2

1

30

29

E70

B21

1 2

25

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 SWITCHING 

SOLENOID VALVE LH

B135

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

EN(H6DO)(diag)-107

ENGINE (DIAGNOSTICS)

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

Step

Check

Yes

No

1

CHECK HARNESS BETWEEN ECM AND OIL 
SWITCHING SOLENOID VALVE.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from ECM and oil 
switching solenoid valve.
3) Measure the resistance between ECM and 
oil switching solenoid valve.

Connector & terminal

(B135) No. 25 — (E70) No. 1:
(B135) No. 24 — (E70) No. 2:

Is the resistance less than 1 
Ω?

Go to step 2.

Repair the open 
circuit of harness 
between ECM and 
oil switching sole-
noid valve connec-
tor.

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

2

CHECK OIL SWITCHING SOLENOID VALVE.
1) Remove the oil switching solenoid valve 
connector.
2) Measure the resistance between oil switch-
ing solenoid valve terminals.

Terminal

No. 1 — No. 2:

Is the resistance 6 — 12 

Ω

Repair the poor 
contact in ECM 
and oil switching 
solenoid valve.

Replace the oil 
switching solenoid 
valve. <Ref. to 
ME(H6DO)-80, Oil 
Switching Sole-
noid Valve.>

EN(H6DO)(diag)-108

ENGINE (DIAGNOSTICS)

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

R: DTC P0083 INTAKE VALVE CONTROL SOLENOID CIRCUIT HIGH (BANK 2)

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

CAUTION:
After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H6DO)(diag)-41, 
OPERATION, Clear Memory Mode.> and Inspection Mode <Ref. to EN(H6DO)(diag)-34, PROCEDURE, 
Inspection Mode.>.
WIRING DIAGRAM:

EN-02498

B21

E2

B135

E70

24

2

1

30

29

E70

B21

1 2

25

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 SWITCHING 

SOLENOID VALVE LH

B135

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