Subaru Legacy IV (2008 year). Service manual — part 340

EN(H4DOTC)(diag)-181

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

ENGINE (DIAGNOSTICS)

AY:DTC P0335 CRANKSHAFT POSITION SENSOR “A” CIRCUIT

DTC DETECTING CONDITION:
• Immediately at fault recognition
• GENERAL DESCRIPTION <Ref. to GD(H4DOTC)-88, DTC P0335 CRANKSHAFT POSITION SENSOR
“A” CIRCUIT, Diagnostic Trouble Code (DTC) Detecting Criteria.>
TROUBLE SYMPTOM:
• Engine stalls.
• Failure of engine to start

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-05676

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

1

2

14

3

14

24

B21

E2

E10

E10

1 2

B134

13

E

B134

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

34 35

36 37 38 39 40 41

48 49

50 51 52 53 54

42 43

44 45

46 47

26 27 28 29 30 31 32 33

B21

CRANKSHAFT

POSITION

SENSOR

ECM

EN(H4DOTC)(diag)-182

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

ENGINE (DIAGNOSTICS)

Step

Check

Yes

No

1

CHECK CONDITION OF CRANKSHAFT PO-
SITION SENSOR.

Is the crankshaft position sen-
sor installation bolt tightened
securely?

Go to step 2.

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

2

CHECK CRANKSHAFT POSITION SENSOR.
1) Turn the ignition switch to OFF.
2) Remove the crankshaft position sensor.
3) Measure the resistance between connector
terminals of crankshaft position sensor.

Terminals

No. 1 — No. 2:

Is the resistance between 1 and
4 k

:?

Go to step 3.

Replace the crank-
shaft position sen-
sor. <Ref. to
FU(H4DOTC)-32,
Crankshaft Posi-
tion Sensor.>

3

CHECK HARNESS BETWEEN ECM AND
CRANK SHAFT POSITION SENSOR.
1) Disconnect the connectors from ECM.
2) Measure the resistance of harness between
ECM and crankshaft position sensor connector.

Connector & terminal

(B134) No. 13 — (E10) No. 1:
(B134) No. 14 — (E10) No. 2:

Is the resistance less than 1

:? Repair the poor

contact of ECM
and crankshaft
position sensor
connector.

Repair the harness
and connector.

NOTE:
In this case, repair
the following item:
• Open circuit in
harness between
ECM and crank-
shaft position sen-
sor connector
• Poor contact of
coupling connector

EN(H4DOTC)(diag)-183

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

ENGINE (DIAGNOSTICS)

AZ:DTC P0336 CRANKSHAFT POSITION SENSOR “A” CIRCUIT RANGE/

PERFORMANCE

DTC DETECTING CONDITION:
• Two consecutive driving cycles with fault
• GENERAL DESCRIPTION <Ref. to GD(H4DOTC)-90, DTC P0336 CRANKSHAFT POSITION SENSOR
“A” CIRCUIT RANGE/PERFORMANCE, Diagnostic Trouble Code (DTC) Detecting Criteria.>
TROUBLE SYMPTOM:
• Engine stalls.
• Failure of engine to start

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-05676

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

1

2

14

3

14

24

B21

E2

E10

E10

1 2

B134

13

E

B134

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

34 35

36 37 38 39 40 41

48 49

50 51 52 53 54

42 43

44 45

46 47

26 27 28 29 30 31 32 33

B21

CRANKSHAFT

POSITION

SENSOR

ECM

EN(H4DOTC)(diag)-184

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

ENGINE (DIAGNOSTICS)

Step

Check

Yes

No

1

CHECK CONDITION OF CRANKSHAFT PO-
SITION SENSOR.
Turn the ignition switch to OFF.

Is the crankshaft position sen-
sor installation bolt tightened
securely?

Go to step 2.

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

2

CHECK CRANK SPROCKET.
Remove the timing belt cover. <Ref. to
ME(H4DOTC)-46, REMOVAL, Timing Belt
Cover.>

Are crank sprocket teeth
cracked or damaged?

Replace the crank
sprocket. <Ref. to
ME(H4DOTC)-57,
Crank Sprocket.>

Go to step 3.

3

CHECK INSTALLATION CONDITION OF
TIMING BELT.
Turn the crankshaft using ST, and align the
alignment mark on crank sprocket with align-
ment mark on cylinder block.
ST

499987500

CRANKSHAFT
SOCKET

Is the timing belt dislocated
from its proper position?

Repair the installa-
tion condition of
timing belt. <Ref. to
ME(H4DOTC)-47,
Timing Belt.>

Replace the crank-
shaft position sen-
sor. <Ref. to
FU(H4DOTC)-32,
Crankshaft Posi-
tion Sensor.>