Subaru Legacy IV (2008 year). Manual — part 366

EN(H4DOTC)(diag)-285

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

ENGINE (DIAGNOSTICS)

DA:DTC P2006 INTAKE MANIFOLD RUNNER CONTROL STUCK CLOSED

(BANK 1)

DTC DETECTING CONDITION:
• Immediately at fault recognition
• GENERAL DESCRIPTION <Ref. to GD(H4DOTC)-189, DTC P2006 INTAKE MANIFOLD RUNNER CON-
TROL STUCK CLOSED (BANK 1), Diagnostic Trouble Code (DTC) Detecting Criteria.>

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.>.

Step

Check

Yes

No

1

CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed?

Check the appro-
priate DTC using
the “List of Diag-
nostic Trouble
Code (DTC)”.
<Ref. to
EN(H4DOTC)(diag)
-81, List of Diag-
nostic Trouble
Code (DTC).>

Go to step 2.

2

CHECK TUMBLE GENERATOR VALVE RH.
1) Remove the tumble generator valve assem-
bly RH.
2) Check the tumble generator valve body.

Is there any dirt or clogging with
foreign objects in the tumble
generator valve?

Clean the tumble
generator valve.

Replace the tum-
ble generator valve
assembly RH.
<Ref. to
FU(H4DOTC)-41,
Tumble Generator
Valve Assembly.>

EN(H4DOTC)(diag)-286

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

ENGINE (DIAGNOSTICS)

DB:DTC P2007 INTAKE MANIFOLD RUNNER CONTROL STUCK CLOSED

(BANK 2)

DTC DETECTING CONDITION:
• Immediately at fault recognition
• GENERAL DESCRIPTION <Ref. to GD(H4DOTC)-190, DTC P2007 INTAKE MANIFOLD RUNNER CON-
TROL STUCK CLOSED (BANK 2), Diagnostic Trouble Code (DTC) Detecting Criteria.>

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.>.

Step

Check

Yes

No

1

CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed?

Check the appro-
priate DTC using
the “List of Diag-
nostic Trouble
Code (DTC)”.
<Ref. to
EN(H4DOTC)(diag)
-81, List of Diag-
nostic Trouble
Code (DTC).>

Go to step 2.

2

CHECK TUMBLE GENERATOR VALVE LH.
1) Remove the tumble generator valve assem-
bly LH.
2) Check the tumble generator valve body.

Is there any dirt or clogging with
foreign objects in the tumble
generator valve?

Clean the tumble
generator valve.

Replace the tum-
ble generator valve
assembly LH.
<Ref. to
FU(H4DOTC)-41,
Tumble Generator
Valve Assembly.>

EN(H4DOTC)(diag)-287

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

ENGINE (DIAGNOSTICS)

DC:DTC P2008 INTAKE MANIFOLD RUNNER CONTROL CIRCUIT / OPEN

(BANK 1)

DTC DETECTING CONDITION:
• Immediately at fault recognition
• GENERAL DESCRIPTION <Ref. to GD(H4DOTC)-191, DTC P2008 INTAKE MANIFOLD RUNNER CON-
TROL CIRCUIT / OPEN (BANK 1), Diagnostic Trouble Code (DTC) Detecting Criteria.>

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-05684

E55

B21

E2

E55

B21

B137

23

22

8

19

5

4

B137

1 2 3 4 5 6 7 8 9 10 11

12 13 14 15 16 17 18 19 20 21 22
23 24 25 26 27 28 29 30 31 32 33

34

35

42

43

36

37

38

39

48

49

50

51

52

53

54

40

41

44

45

46

47

1

3

2

4 5

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

TUMBLE GENERATOR

VALVE ASSY RH

(WITH BUILT-IN SENSOR)

ECM

EN(H4DOTC)(diag)-288

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

ENGINE (DIAGNOSTICS)

Step

Check

Yes

No

1

CHECK HARNESS BETWEEN ECM AND
TUMBLE GENERATOR VALVE ASSEMBLY
RH CONNECTOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from the ECM
and tumble generator valve assembly RH.
3) Measure the resistance of harness between
ECM and tumble generator valve assembly RH.

Connector & terminal

(B137) No. 22 — (E55) No. 5:
(B137) No. 23 — (E55) No. 4:

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 in
harness between
ECM and tumble
generator valve
assembly RH con-
nector
• Poor contact of
coupling connector

2

CHECK HARNESS BETWEEN ECM AND
TUMBLE GENERATOR VALVE ASSEMBLY
RH CONNECTOR.
Measure the resistance between ECM and
chassis ground.

Connector & terminal

(B137) No. 22 — Chassis ground:
(B137) No. 23 — Chassis ground:

Is the resistance 1 M

: or

more?

Go to step 3.

Repair the short
circuit to ground in
harness between
ECM and tumble
generator valve
assembly RH con-
nector.

3

CHECK POOR CONTACT.
Check for poor contact of tumble generator
valve assembly RH connector.

Is there poor contact in the tum-
ble generator valve assembly
RH connector?

Repair the poor
contact of tumble
generator valve
assembly RH con-
nector.

Replace the tum-
ble generator valve
assembly RH.
<Ref. to
FU(H4DOTC)-41,
Tumble Generator
Valve Assembly.>