Subaru Legacy (2005 year). Manual - part 471

EN(H6DO)(diag)-197

ENGINE (DIAGNOSTICS)

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

Step

Check

Yes

No

1

CHECK ANY OTHER DTC ON DISPLAY.

Is any other DTC displayed?

Inspect the rele-
vant DTC using 
“List of Diagnostic 
Trouble Code 
(DTC)”. <Ref. to 
EN(H6DO)(diag)-
66, List of Diag-
nostic Trouble 
Code (DTC).>

Go to step 2.

2

CHECK POWER SUPPLY OF CAMSHAFT 
POSITION SENSOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from camshaft 
position sensor.
3) Measure the voltage between camshaft 
position sensor connector and engine ground.

Connector & terminal

(E73) No. 1 (+) — Engine ground (

−

):

Is the voltage more than 10 V? Repair the battery 

short circuit 
between main 
relay connector 
and camshaft 
position sensor 
connector.

Go to step 3.

3

CHECK POWER SUPPLY OF CAMSHAFT 
POSITION SENSOR.
1) Turn the ignition switch to ON.
2) Measure the voltage between camshaft 
position sensor connector and engine ground.

Connector & terminal

(E73) No. 1 (+) — Engine ground (

−

):

Is the voltage more than 10 V? Go to step 4.

Repair the open or 
battery short cir-
cuit between main 
relay connector 
and camshaft 
position sensor 
connector.

4

CHECK HARNESS BETWEEN CAMSHAFT 
POSITION SENSOR CONNECTOR AND 
ECM.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from ECM.
3) Measure the resistance between camshaft 
position sensor connector and ECM.

Connector & terminal

(E73) No. 2 — (B135) No. 9:
(E73) No. 3 — (B136) No. 35:

Is the resistance less than 1 
Ω?

Go to step 5.

Repair the open 
circuit between 
camshaft position 
sensor and ECM.

5

CHECK HARNESS BETWEEN CAMSHAFT 
POSITION SENSOR CONNECTOR AND 
ECM.
Measure the resistance between camshaft 
position sensor connector and engine ground.

Connector & terminal

(E73) No. 2 — Engine ground:

Is the resistance more than 1 
M

Ω?

Go to step 6.

Repair the ground 
short circuit 
between camshaft 
position sensor 
and ECM.

6

CHECK CONDITION OF CAMSHAFT POSI-
TION SENSOR.

Is the camshaft position sensor 
installation bolt tightened 
securely?

Go to step 7.

Tighten the cam-
shaft position sen-
sor installation bolt 
securely.

7

CHECK CAMSHAFT POSITION SENSOR.
Check waveform of camshaft position sensor. 
<Ref. to EN(H6DO)(diag)-17, Engine Control 
Module (ECM) I/O Signal.>

Is there any abnormality in 
waveform?

Replace the cam-
shaft position sen-
sor. <Ref. to 
FU(H6DO)-19, 
Crankshaft Posi-
tion Sensor.>

Go to step 8.

8

CHECK POOR CONTACT.
Check poor contact in ECM connector.

Is there poor contact in ECM 
connector?

Repair the poor 
contact in ECM 
connector.

Replace the ECM. 
<Ref. to 
FU(H6DO)-34, 
Engine Control 
Module (ECM).>

EN(H6DO)(diag)-198

ENGINE (DIAGNOSTICS)

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

BL:DTC P0345 CAMSHAFT POSITION SENSOR “A” CIRCUIT (BANK 2)

DTC DETECTING CONDITION:
Immediately at fault recognition
TROUBLE SYMPTOM:
• Engine stalls.
• Failure of engine to start

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-03501

B47

E

E2

B21

3

C35

SBF-7

E74

E1

B20

2

E73

B21

E2

1

19

3

B9

*

*

B83

2

1

ECM

B136

B135

B:

C:

48

1

3

4

1

2

5

6

B20

E74

B47

1 2 3

1 2 3 4
5 6 7 8

B83

B136

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

35

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

E73

BATTERY

CAMSHAFT
POSITION
SENSOR RH

CAMSHAFT
POSITION
SENSOR LH

MAIN RELAY

B:

C:

2

B8

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

6
4

: TERMINAL No. 
  RANDOM ARRANGEMENT

*

1 2 3 4
5 6 7 8
9 10 11 12

14

13

15 16

EN(H6DO)(diag)-199

ENGINE (DIAGNOSTICS)

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

Step

Check

Yes

No

1

CHECK ANY OTHER DTC ON DISPLAY.

Is any other DTC displayed?

Inspect the rele-
vant DTC using 
“List of Diagnostic 
Trouble Code 
(DTC)”. <Ref. to 
EN(H6DO)(diag)-
66, List of Diag-
nostic Trouble 
Code (DTC).>

Go to step 2.

2

CHECK POWER SUPPLY OF CAMSHAFT 
POSITION SENSOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from camshaft 
position sensor.
3) Measure the voltage between camshaft 
position sensor connector and engine ground.

Connector & terminal

(E74) No. 1 (+) — Engine ground (

−

):

Is the voltage more than 10 V? Repair the battery 

short circuit 
between main 
relay connector 
and camshaft 
position sensor 
connector.

Go to step 3.

3

CHECK POWER SUPPLY OF CAMSHAFT 
POSITION SENSOR.
1) Turn the ignition switch to ON.
2) Measure the voltage between camshaft 
position sensor connector and engine ground.

Connector & terminal

(E74) No. 1 (+) — Engine ground (

−

):

Is the voltage more than 10 V? Go to step 4.

Repair the open or 
battery short cir-
cuit between main 
relay connector 
and camshaft 
position sensor 
connector.

4

CHECK HARNESS BETWEEN CAMSHAFT 
POSITION SENSOR CONNECTOR AND 
ECM.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from ECM.
3) Measure the resistance between camshaft 
position sensor connector and ECM.

Connector & terminal

(E74) No. 2 — (B135) No. 8:
(E74) No. 3 — (B136) No. 35:

Is the resistance less than 1 
Ω?

Go to step 5.

Repair the open 
circuit between 
camshaft position 
sensor and ECM.

5

CHECK HARNESS BETWEEN CAMSHAFT 
POSITION SENSOR CONNECTOR AND 
ECM.
Measure the resistance between camshaft 
position sensor connector and engine ground.

Connector & terminal

(E74) No. 2 — Engine ground:

Is the resistance more than 1 
M

Ω?

Go to step 6.

Repair the ground 
short circuit 
between camshaft 
position sensor 
and ECM.

6

CHECK CONDITION OF CAMSHAFT POSI-
TION SENSOR.

Is the camshaft position sensor 
installation bolt tightened 
securely?

Go to step 7.

Tighten the cam-
shaft position sen-
sor installation bolt 
securely.

7

CHECK CAMSHAFT POSITION SENSOR.
Check waveform of camshaft position sensor. 
<Ref. to EN(H6DO)(diag)-17, Engine Control 
Module (ECM) I/O Signal.>

Is there any abnormality in 
waveform?

Replace the cam-
shaft position sen-
sor. <Ref. to 
FU(H6DO)-20, 
Camshaft Position 
Sensor.>

Go to step 8.

8

CHECK POOR CONTACT.
Check poor contact in ECM connector.

Is there poor contact in ECM 
connector?

Repair the poor 
contact in ECM 
connector.

Replace the ECM. 
<Ref. to 
FU(H6DO)-34, 
Engine Control 
Module (ECM).>

EN(H6DO)(diag)-200

ENGINE (DIAGNOSTICS)

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

BM:DTC P0400 EXHAUST GAS RECIRCULATION FLOW

DTC DETECTING CONDITION:
Detects when malfunction occurs in 2 continuous driving cycles.
TROUBLE SYMPTOM:
• Movement performance problem when engine is low speed.
• Erroneous idling
• Movement performance problem

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-03502

E

B47

E18

2

5

1

4

3

6

B21

E2

E76

E77

48

3

10

9

11

8

4

7

6

SBF-7

BATTERY

MAIN RELAY

EGR

VALVE

B134

ECM

B47

3

4

1

2

5

6

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

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

B134

10

E76

E77

21

32

33

22

B21

E2

E18

1

3

4 5 6

2

1 2

3 4

5

6

7

8

9

10

E77

6
4