Subaru Legacy III (2000-2003 year). Manual - part 514

EN(H4DOSTC)-226

ENGINE (DIAGNOSTICS)

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)

BH:DTC P1249 — RELIEF VALVE CONTROL SOLENOID VALVE 2 CIRCUIT 

LOW —

• TROUBLE SYMPTOM:

• Poor driving performance

CAUTION:
After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4DOSTC)-35, 
OPERATION, Clear Memory Mode.> and Inspection Mode <Ref. to EN(H4DOSTC)-33, Inspection 
Mode.> .
• WIRING DIAGRAM:

EN-00939

B220

B47

E

BATTERY

MAIN RELAY

3

B136

ECM

SBF-5

5

2
1

4

6

B47

3

4

1

2

5

6

B220

SOLENOID 
BOX ASSY

1

2

3

4

5

6

7

8

9

10

11

12

(A)

(B)

(C)

(D)

(E)

(F)

(A): RELIEF VALVE SOLENOID 2
(B): RELIEF VALVE SOLENOID 1
(C): EXHAUST VALVE CONTROL SOLENOID VALVE
       (NEGATIVE PRESSURE)
(D): EXHAUST VALVE CONTROL SOLENOID VALVE
       (POSITIVE PRESSURE)
(E): INTAKE AIR CONTROL SOLENOID VALVE
(F): EXHAUST VALVE CONTROL DUTY SOLENOID VALVE

C:

B137

D:

C11

C12

C3

C1

D22

D11

1 2 3 4
5 6 7 8
9 10 11 12

B136

1 2

7

8 9

5

6

3

4

10 11 12
19 20 21

13 14 15 16

17 18

22 23 24

B137

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

EN(H4DOSTC)-227

ENGINE (DIAGNOSTICS)

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)

Step

Value

Yes

No

1

CHECK INTPUT SIGNAL TO ECM.
1) Turn the ignition switch to ON.
2) Measure the voltage between ECM and 

chassis ground.

Connector & terminal

(B136) No. 11 (+) — Chassis ground (

−−−−

):

Does the measured value exceed the spec-
ified value?

10 V

Even if MI lights 
up, the circuit has 
returned to a nor-
mal condition at 
this time. Contact 
SUBARU distribu-
tor service.

NOTE:
Inspection by DTM
is required, be-
cause probable
cause is deteriora-
tion of multiple
parts.

Go to step 2.

2

CHECK HARNESS BETWEEN RELIEF 
VALVE CONTROL SOLENOID VALVE 2 AND 
ECM CONNECTOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from relief valve 

control solenoid valve 2 and ECM.

3) Measure the resistance of harness 

between relief valve control solenoid valve 
2 connector and engine ground.

Connector & terminal

(B220) No. 2 — Engine ground:

Does the measured value exceed the spec-
ified value?

1 M

Ω

Go to step 3.

Repair the ground 
short circuit in har-
ness between 
ECM and relief 
valve control sole-
noid valve 2 con-
nector.

3

CHECK HARNESS BETWEEN RELIEF 
VALVE CONTROL SOLENOID VALVE 2 AND 
ECM CONNECTOR.
Measure the resistance of harness between 
ECM and relief valve control solenoid valve 2 
of harness connector.

Connector & terminal

(B136) No. 11 — (B220) No. 2:

Is the measured value less than the specified 
value?

1 

Ω

Go to step 4.

Repair the open 
circuit in harness 
between ECM and 
relief valve control 
solenoid valve 2 
connector.

4

CHECK RELIEF VALVE CONTROL SOLE-
NOID VALVE 2.
Measure the resistance between relief valve 
control solenoid valve 2 terminals.

Terminals

No. 1 — No. 2:

Is the measured value within the specified 
value?

37 — 44 

Ω

Go to step 5.

Replace the relief 
valve control sole-
noid valve 2.  
<Ref. to 
IN(H4DOSTC)-19, 
Solenoid Box 
Assembly.>

5

CHECK POWER SUPPLY TO RELIEF VALVE 
CONTROL SOLENOID VALVE 2.
1) Turn the ignition switch to ON.
2) Measure the voltage between wastegate 

control solenoid valve and engine ground.

Connector & terminal

(B220) No. 1 (+) — Engine ground (

−−−−

):

Does the measured value exceed the spec-
ified value?

10 V

Go to step 6.

Repair the open 
circuit in harness 
between main 
relay and relief 
valve control sole-
noid valve 2 con-
nector.

EN(H4DOSTC)-228

ENGINE (DIAGNOSTICS)

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)

6

CHECK POOR CONTACT.
Check poor contact in ECM and relief valve 
control solenoid valve 2 and ECM connectors.
Are there poor contact in ECM and relief valve 
control solenoid valve 2 and ECM connectors?

There are poor contacts.

Repair the poor 
contact in ECM 
and relief valve 
control solenoid 
valve 2 and ECM 
connectors.

Contact SUBARU 
distributor service.

NOTE:
Inspection by DTM
is required, be-
cause probable
cause is deteriora-
tion of multiple
parts.

Step

Value

Yes

No

EN(H4DOSTC)-229

ENGINE (DIAGNOSTICS)

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)

MEMO: