Subaru Legacy (2005 year). Service manual - part 221

EN(H4SO 2.5)(diag)-169

ENGINE (DIAGNOSTICS)

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

6

CHECK PURGE CONTROL SOLENOID 
VALVE.
1) Turn the ignition switch to OFF.
2) Measure the resistance between purge 
control solenoid valve terminals.

Terminals

No. 1 — No. 2:

Is the resistance less than 1 
Ω?

Replace the purge 
control solenoid 
valve <Ref. to 
EC(H4SO 2.0)-7, 
Purge Control 
Solenoid Valve.> 
and ECM <Ref. to 
FU(H4SO 2.5)-37, 
Engine Control 
Module (ECM).>.

Go to step 7.

7

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(H4SO 
2.5)-37, Engine 
Control Module 
(ECM).>

Step

Check

Yes

No

EN(H4SO 2.5)(diag)-170

ENGINE (DIAGNOSTICS)

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

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

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(H4SO 2.5)(diag)-
40, Clear Memory Mode.> and Inspection Mode <Ref. to EN(H4SO 2.5)(diag)-33, Inspection Mode.>.

AO: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(H4SO 2.5)(diag)-
40, Clear Memory Mode.> and Inspection Mode <Ref. to EN(H4SO 2.5)(diag)-33, Inspection Mode.>.

Step

Check

Yes

No

1

CHECK OPTION CODE.

Is the option code EC, EK, EH, 
ER or K4?

Go to step 2.

Refer to EN(H4SO 
2.0) section. <Ref. 
to EN(H4SO 
2.0)(diag)-64, List 
of Diagnostic Trou-
ble Code (DTC).>

NOTE:
Fuel injection sys-
tem for KA and KS
model is the same
as 2.0 L model.

2

CHECK ANY OTHER DTC ON DISPLAY.

Is DTC P0462 displayed on the 
Subaru Select Monitor?

Check the combi-
nation meter sys-
tem. <Ref. to IDI-3, 
Combination 
Meter System.>

Temporary poor 
contact occurs.

Step

Check

Yes

No

1

CHECK OPTION CODE.

Is the option code EC, EK, EH, 
ER or K4?

Go to step 2.

Refer to EN(H4SO 
2.0) section. <Ref. 
to EN(H4SO 
2.0)(diag)-64, List 
of Diagnostic Trou-
ble Code (DTC).>

NOTE:
Fuel injection sys-
tem for KA and KS
model is the same
as 2.0 L model.

2

CHECK ANY OTHER DTC ON DISPLAY.

Is DTC P0463 displayed on the 
Subaru Select Monitor?

Check the combi-
nation meter sys-
tem. <Ref. to IDI-3, 
Combination 
Meter System.>

Temporary poor 
contact occurs.

EN(H4SO 2.5)(diag)-171

ENGINE (DIAGNOSTICS)

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

AP: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(H4SO 2.5)(diag)-
40, Clear Memory Mode.> and Inspection Mode <Ref. to EN(H4SO 2.5)(diag)-33, Inspection Mode.>.

AQ: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(H4SO 2.5)(diag)-
40, Clear Memory Mode.> and Inspection Mode <Ref. to EN(H4SO 2.5)(diag)-33, Inspection Mode.>.

Step

Check

Yes

No

1

CHECK OPTION CODE.

Is the option code EC, EK, EH, 
ER or K4?

Go to step 2.

Refer to EN(H4SO 
2.0) section. <Ref. 
to EN(H4SO 
2.0)(diag)-64, List 
of Diagnostic Trou-
ble Code (DTC).>

NOTE:
Fuel injection sys-
tem for KA and KS
model is the same
as 2.0 L model.

2

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(H4SO 2.5)(diag)-172

ENGINE (DIAGNOSTICS)

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

WIRING DIAGRAM:
• EC, EK, EH, ER and K4 model

• KA and KS model

NOTE:
Fuel injection system for KA and KS model is the same as 2.0 L model. Refer to EN(H4SO 2.0) section.

EN-03453

D8

B32

No.21

B225

MAIN SBF

SBF-6

E

ECM

B137

D:

B135

B:

B72

B14

M

2

3

B225

B137

B72

D:

B135

B:

10

11 12

13
14

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17
18

19 20

21
22

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25
26

27 28

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30

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34

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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

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26

1

2

7

8 9

5

6

3

4

10 11 12

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20 21

29 30 31

13 14 15 16 17

27

28

18

22 23

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26

32 33

34 35

1

3

4 5 6

2

BATTERY

IGNITION
SWITCH

STARTER
RELAY

STARTER MOTOR

LHD

LHD

RHD

RHD

16

14

15

13

15

13

16

14