Subaru Legacy (2005 year). Manual — part 474

EN(H6DO)(diag)-209

ENGINE (DIAGNOSTICS)

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

BQ:DTC P0462 FUEL LEVEL SENSOR “A” CIRCUIT LOW

NOTE:
For the diagnostic procedure, refer to DTC P0463. <Ref. to EN(H6DO)(diag)-209, DTC P0463 FUEL LEVEL
SENSOR “A” CIRCUIT HIGH, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>

BR:DTC P0463 FUEL LEVEL SENSOR “A” CIRCUIT HIGH

DTC DETECTING CONDITION:
Detects when malfunction occurs in 2 continuous driving cycles.

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.>.

BS:DTC P0500 VEHICLE SPEED SENSOR “A”

DTC DETECTING CONDITION:
Immediately at fault recognition

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.>.

BT:DTC P0512 STARTER REQUEST CIRCUIT

DTC DETECTING CONDITION:
Detects when malfunction occurs in 2 continuous driving cycles.
TROUBLE SYMPTOM:
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.>.

Step

Check

Yes

No

1

CHECK ANY OTHER DTC ON DISPLAY.

Is DTC P0462 or P0463 dis-
played on the Subaru Select
Monitor?

Check the combi-
nation meter.
<Ref. to IDI-15,
Combination
Meter.>

Temporary poor
contact occurs.

Step

Check

Yes

No

1

CHECK DTC OF ABS.
Check DTC of ABS.

Is DTC of ABS displayed?

Perform the diag-
nosis according to
DTC. <Ref. to
ABS(diag)-38, List
of Diagnostic Trou-
ble Code (DTC).>

Repair the poor
contact in ECM.

EN(H6DO)(diag)-210

ENGINE (DIAGNOSTICS)

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

WIRING DIAGRAM:

Step

Check

Yes

No

1

CHECK HARNESS BETWEEN IGNITION
SWITCH AND ECM.
1) Disconnect the connector from ECM.
2) Measure the voltage between ECM and
chassis ground.

Connector & terminal

(B135) No. 32 (+) — Chassis ground (

−

):

Is the voltage more than 10 V? Repair the battery

short circuit of har-
ness between igni-
tion switch and
ECM.

Repair the poor
contact in ECM.

EN-03489

D8

B32

No.21

B225

MAIN SBF

SBF-6

E

1

3

2

4

ECM

B137

D:

B135

B:

B72

B14

M

2

3

B225

B137

B72

D:

B135

B:

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 36

39 40

37
38

1

2

9

3

4

5

6

7

8

1

2

7

8 9

5

6

3

4

10 11 12

19 20 21

29

30 31

13 14 15 16 17

27

28

18

22 23

24 25

26

1

2

7

8 9

5

6

3

4

10 11 12

19

20 21

29 30 31

13 14 15 16 17

27

28

18

22 23

24 25

26

32 33

34 35

1

3

4 5 6

2

BATTERY

IGNITION
SWITCH

STARTER
RELAY

STARTER MOTOR

*

*

*

*

*

LHD: 15
RHD: 16

1

*

LHD: 16
RHD: 15

2

*

LHD: 13
RHD: 14

3

*

LHD: 14
RHD: 13

4

EN(H6DO)(diag)-211

ENGINE (DIAGNOSTICS)

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

BU:DTC P0519 IDLE AIR CONTROL SYSTEM PERFORMANCE

DTC DETECTING CONDITION:
Immediately at fault recognition
TROUBLE SYMPTOM:
Engine keeps running at higher revolution than specified idling revolution.

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.>.

BV:DTC P0600 SERIAL COMMUNICATION LINK

NOTE:
For the diagnostic procedure, refer to LAN section. <Ref. to LAN(diag)-2, Basic Diagnostic Procedure.>

Step

Check

Yes

No

1

CHECK ANY OTHER DTC ON DISPLAY.

Is any other DTC displayed?

Check DTC using
the List of Diag-
nostic Trouble
Code (DTC). <Ref.
to
EN(H6DO)(diag)-
66, List of Diag-
nostic Trouble
Code (DTC).>

NOTE:
In this case, it is
not necessary to
inspect DTC
P0519.

Go to step 2.

2

CHECK AIR INTAKE SYSTEM.
1) Turn the ignition switch to ON.
2) Start and idle the engine.
3) Check the following items.
• Loose installation of intake manifold and
throttle body
• Cracks of intake manifold gasket and throttle
body gasket
• Disconnections of vacuum hoses

Is there any fault in air intake
system?

Repair air suction
and leaks.

Go to step 3.

3

CHECK ELECTRONIC THROTTLE CON-
TROL.
1) Turn the ignition switch to OFF.
2) Remove the electronic throttle control.
3) Check the electronic throttle control.

Are foreign matters found
inside the electronic throttle
control?

Remove foreign
matters from the
electronic throttle
control.

Perform the diag-
nosis of DTC
P2101.

EN(H6DO)(diag)-212

ENGINE (DIAGNOSTICS)

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

BW:DTC P0604 INTERNAL CONTROL MODULE RANDAM ACCESS MEMORY

(RAM) ERROR

DTC DETECTING CONDITION:
Immediately at fault recognition
TROUBLE SYMPTOM:
• Engine does not start.
• Engine stalls.

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-03490

BATTERY

IGNITION
SWITCH

MAIN RELAY

SBF-6

MAIN SBF

SBF-7

B72

B6

B5

D16

A6

D2

A7

B12

D3

D7

D1

B19

D14

No.12

B47

E2

B21

ECM

E

E

3

6

B134

B135

A:

D: B137

B:

B4

52

37

36

34

12

3

4

1

2

5

6

B47

No.13

B1

35

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

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

B137

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

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

B72

1

3

4 5 6

2

A:

B:

D:

SBF-5

A4

A5

54

3
5

6
4

1
2

TO OXYGEN SENSOR