Subaru Legacy (2005 year). Manual - part 346

EN(H4DOTC)(diag)-153

ENGINE (DIAGNOSTICS)

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

AS:DTC P0563 SYSTEM VOLTAGE HIGH

DTC DETECTING CONDITION:
Detects when the power supply voltage of ECM is high.
TROUBLE SYMPTOM:
Charge indicator light illuminates.

CAUTION:
After repair or replacement of faulty parts, perform Clear Memory Mode <Ref. to EN(H4DOTC)(diag)-
37, OPERATION, Clear Memory Mode.> and Inspection Mode <Ref. to EN(H4DOTC)(diag)-30, PROCE-
DURE, Inspection Mode.>.
WIRING DIAGRAM:

Step

Check

Yes

No

1

CHECK BATTERY.
1) Turn the ignition switch to OFF.
2) Measure the battery voltage and specific 
gravity of electrolyte.

Is the voltage more than 12 V 
and the specific gravity more 
than 1.26?

Go to step 2.

Replace the bat-
tery. 

EN-03528

B47

E

SBF-7

MAIN SBF

B47

B135

ECM

5

6

5
4

6
3

2
1

3

4

1

2

5

6

B135

GENERATOR

MAIN RELAY

BATTERY

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

EN(H4DOTC)(diag)-154

ENGINE (DIAGNOSTICS)

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

2

CHECK GENERATOR.
1) Start the engine.
2) Run the engine at idle after warming up.
3) Measure the voltage between generator B 
terminal and chassis ground.

Terminals

Generator B terminal (+) — Chassis 
ground (

−

):

Is the voltage less than 16.2 
V?

Go to step 3.

Repair the genera-
tor. <Ref. to 
SC(H4SO 2.0)-14, 
Generator.>

3

CHECK GENERATOR.
1) Run the engine at 5,000 rpm.
2) Measure the voltage between generator B 
terminal and chassis ground.

Terminals

Generator B terminal (+) — Chassis 
ground (

−

):

Is the voltage less than 16.2 
V?

Go to step 4.

Repair the genera-
tor. <Ref. to 
SC(H4SO 2.0)-14, 
Generator.>

4

CHECK BATTERY TERMINAL.
1) Turn the ignition switch to OFF.
2) Check the installation of positive and nega-
tive terminals of battery.

Are the positive and negative 
battery terminals clamped 
tightly?

Go to step 5.

Tighten the clamp 
of terminal.

5

CHECK INPUT VOLTAGE OF ECM.
1) Run the engine at idle.
2) Measure the voltage between ECM con-
nector and chassis ground.

Connector & terminal

(B135) No. 5 (+) — Chassis ground (

−

):

(B135) No. 6 (+) — Chassis ground (

−

):

Is the voltage less than 16.2 
V?

Go to step 6.

Repair the har-
ness connectors 
between battery, 
main relay and 
ECM.

6

CHECK POOR CONTACT IN CONNECTORS.
Check the poor contact in connectors between 
generator, battery and ECM.

Is there poor contact in con-
nectors between generator, 
battery and ECM?

Repair the poor 
contact.

Go to step 7.

7

CHECK ECM.
1) Connect all the connectors.
2) Perform the clear memory mode. <Ref. to 
EN(H4DOTC)(diag)-37, Clear Memory Mode.>
3) Perform the inspection mode. <Ref. to 
EN(H4DOTC)(diag)-30, Inspection Mode.>
4) Read the DTC. <Ref. to 
EN(H4DOTC)(diag)-29, Read Diagnostic Trou-
ble Code (DTC).>
Check if the same DTC is displayed.

Is the same DTC displayed?

Replace the gen-
erator.

Go to step 8.

8

CHECK OTHER DTC DETECTION.
Check if any other DTC is displayed.

Is any other DTC displayed?

Perform the diag-
nosis of DTC dis-
played.

Temporary poor 
contact occurs.

Step

Check

Yes

No

EN(H4DOTC)(diag)-155

ENGINE (DIAGNOSTICS)

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

AT:DTC P0600 SERIAL COMMUNICATION LINK

NOTE:
For the diagnostic procedure, refer to LAN system.

AU:DTC P0604 INTERNAL CONTROL MODULE RANDOM ACCESS MEMORY 

(RAM) ERROR

NOTE:
For the diagnostic procedure, refer to DTC P0607. <Ref. to EN(H4DOTC)(diag)-155, DTC P0607 CONTROL
MODULE PERFORMANCE, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>

AV:DTC P0605 INTERNAL CONTROL MODULE READ ONLY MEMORY (ROM) 

ERROR

NOTE:
For the diagnostic procedure, refer to DTC P0607. <Ref. to EN(H4DOTC)(diag)-155, DTC P0607 CONTROL
MODULE PERFORMANCE, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>

AW:DTC P0607 CONTROL MODULE PERFORMANCE

DTC DETECTING CONDITION:
Immediately at fault recognition
TROUBLE SYMPTOM:
• Erroneous idling
• Poor driving performance

CAUTION:
After repair or replacement of faulty parts, perform Clear Memory Mode <Ref. to EN(H4DOTC)(diag)-
37, OPERATION, Clear Memory Mode.> and Inspection Mode <Ref. to EN(H4DOTC)(diag)-30, PROCE-
DURE, Inspection Mode.>.

EN(H4DOTC)(diag)-156

ENGINE (DIAGNOSTICS)

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

WIRING DIAGRAM:

Step

Check

Yes

No

1

CHECK INPUT VOLTAGE OF ECM.
1) Turn the ignition switch to ON.
2) Measure the voltage between ECM con-
nector and chassis ground.

Connector & terminal

(B135) No. 5 (+) — Chassis ground (

−

):

(B135) No. 6 (+) — Chassis ground (

−

):

Is the voltage 10 — 13 V?

Go to step 2.

Repair the open or 
ground short cir-
cuit of power sup-
ply circuit.

EN-03519

B72

BATTERY

MAIN RELAY

SBF-6

MAIN SBF

SBF-7

No.13

SBF-5

B72

TO FRONT OXYGEN(A/F) SENSOR

D16

A6

A7

B1

B4

D7

B12

D1

D2

D3

B5

B6

B19

D14

No.12

B47

E2

B21

2

1

4

6

5

3

ECM

E

E

3

6

B134

B135

B137

A:

B:

D:

54

35

36

12

34

3

4

1

2

5

6

B47

B21

B134

A:

B137

D:

B135

B:

IGNITION
SWITCH

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

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

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

37

1

3

4 5 6

2

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