Subaru Legacy III (2000-2003 year). Service 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.
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
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
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
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
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:
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