Subaru Legacy (2005 year). Manual - part 231

EN(H4SO 2.5)(diag)-209

ENGINE (DIAGNOSTICS)

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

Step

Check

Yes

No

1

CHECK HARNESS BETWEEN ECM AND 
TUMBLE GENERATOR VALVE ACTUATOR 
CONNECTOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from tumble gen-
erator valve connector.
3) Measure the voltage between tumble gen-
erator valve actuator and chassis ground.

Connector & terminal

(E55) No. 1 (+) — Chassis ground (

−

):

(E55) No. 2 (+) — Chassis ground (

−

):

Is the voltage less than 5 V?

Replace the tum-
ble generator valve 
actuator. <Ref. to 
FU(H4SO 2.5)-29, 
Tumble Generator 
Valve Actuator.>

Repair the battery 
short circuit 
between ECM and 
tumble generator 
valve actuator.

EN(H4SO 2.5)(diag)-210

ENGINE (DIAGNOSTICS)

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

BV:DTC P2011 INTAKE MANIFOLD RUNNER CONTROL CIRCUIT / OPEN 

(BANK 2)

DTC DETECTING CONDITION:
Immediately at fault recognition

CAUTION:
After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO 2.5)(diag)-
40, Clear Memory Mode.> and Inspection Mode <Ref. to EN(H4SO 2.5)(diag)-33, Inspection Mode.>.
WIRING DIAGRAM:

EN-02469

E51

E2

E51

B21

B134 ECM

28

          TUMBLE 
GENERATOR VALVE
    ACTUATOR LH

29

33

22

1

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

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

EN(H4SO 2.5)(diag)-211

ENGINE (DIAGNOSTICS)

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

Step

Check

Yes

No

1

CHECK HARNESS BETWEEN ECM AND 
TUMBLE GENERATOR VALVE ACTUATOR 
CONNECTOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from tumble gen-
erator valve and ECM connector.
3) Measure the resistance between tumble 
generator valve actuator and ECM connector.

Connector & terminal

(E51) No. 1 — (B134) No. 29:
(E51) No. 2 — (B134) No. 28:

Is the resistance less than 1 
Ω?

Go to step 2.

Repair the open 
circuit between 
ECM and tumble 
generator valve 
connector.

NOTE:
In this case, repair
the following:
• Open circuit of 
harness between 
ECM and tumble 
generator valve 
actuator connector
• Poor contact in 
coupling connector

2

CHECK POOR CONTACT.
Check poor contact in tumble generator valve 
actuator connector.

Is there poor contact in tumble 
generator valve actuator con-
nector?

Repair the poor 
contact in tumble 
generator valve 
actuator connec-
tor.

Replace the tum-
ble generator valve 
actuator. <Ref. to 
FU(H4SO 2.5)-29, 
Tumble Generator 
Valve Actuator.>

EN(H4SO 2.5)(diag)-212

ENGINE (DIAGNOSTICS)

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

BW:DTC P2012 INTAKE MANIFOLD RUNNER CONTROL CIRCUIT LOW (BANK 

2)

DTC DETECTING CONDITION:
Immediately at fault recognition

CAUTION:
After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO 2.5)(diag)-
40, Clear Memory Mode.> and Inspection Mode <Ref. to EN(H4SO 2.5)(diag)-33, Inspection Mode.>.
WIRING DIAGRAM:

EN-02469

E51

E2

E51

B21

B134 ECM

28

          TUMBLE 
GENERATOR VALVE
    ACTUATOR LH

29

33

22

1

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

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