SUBARU LEGACY 1996 Service Repair Manual

OBD0005B
10AH2CHECK PURGE CONTROL SOLENOID
VALVE OPERATION.
1) Turn ignition switch to OFF.
2) Connect test mode connector at the lower portion of
instrument panel (on the driver’s side), to the side of the
center console box.
3) Turn ignition switch to ON.
: Does purge control solenoid valve produce
operating sound at about 0.3 Hz?
NOTE:
Purge control solenoid valve operation check can also be
executed using Subaru Select Monitor (Function mode:
FD02). For the procedure, refer to“COMPULSORY VALVE
OPERATION CHECK MODE”2-7 [T3F0].
: Go to next step 4).
: Replace purge control solenoid valve.
4) Disconnect canister purge hose from canister.
: Does pulsation occur by blowing through
the canister purge hose?
: Repair or replace evaporation line.
NOTE:
In this case, repair the following:

Loose connections in evaporation line

Cracks in evaporation line

Clogging in evaporation line
: Replace purge control solenoid valve.
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10. Diagnostics Chart with Trouble Code

OBD0335
AI: DTC P0443
—EVAPORATIVE EMISSION CONTROL
SYSTEM PURGE CONTROL VALVE CIRCUIT
MALFUNCTION (CPC)—
DTC DETECTING CONDITION:

Two consecutive trips with fault
TROUBLE SYMPTOM:

Erroneous idling
10AI1Check output signal from ECM.

10AI2Check harness between purge control
solenoid valve and ECM connector.
10AI3Check harness between purge control
solenoid valve and ECM connector.
10AI4Check purge control solenoid valve.
10AI5Check power supply to purge control solenoid
valve.
CAUTION:
After repair or replacement of faulty parts, conduct
CLEAR MEMORY and INSPECTION MODES.
<Ref. to 2-7 [T3D0] and [T3E0].>



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10. Diagnostics Chart with Trouble Code

WIRING DIAGRAM:

LHD Model
B2M0569
WIRING DIAGRAM:

RHD Model
B2M0795
B2M0570A
10AI1
CHECK OUTPUT SIGNAL FROM ECM.
1) Turn ignition switch to ON.
2) Measure voltage between ECM and chassis ground.
: Connector & terminal
(B84) No. 72 (+)—Chassis ground ():
Is the voltage more than 10 V?
: Go to step10AI2.
: Go to step10AI3.
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10. Diagnostics Chart with Trouble Code

B2M0570A
10AI2CHECK HARNESS BETWEEN PURGE
CONTROL SOLENOID VALVE AND ECM
CONNECTOR.
1) Turn ignition switch to OFF.
2) Disconnect connector from purge control solenoid
valve.
3) Turn ignition switch to ON.
4) Measure voltage between ECM and chassis ground.
: Connector & terminal
(B84) No. 72 (+)—Chassis ground ():
Is the voltage more than 10 V?
: Repair short circuit in harness between ECM and
purge control solenoid valve connector.
: Go to next step 5).
OBD0338
5) Turn ignition switch to OFF.
6) Measure resistance between purge control solenoid
valve terminals.
: Terminals
No. 1—No. 2:
Is the resistance less than 1Ω?
: Replace purge control solenoid valve and ECM.
: Go to next.
: Is there poor contact in ECM connector?
: Repair poor contact in ECM connector.
: Replace ECM.
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10. Diagnostics Chart with Trouble Code

OBD0680A
10AI3CHECK HARNESS BETWEEN PURGE
CONTROL SOLENOID VALVE AND ECM
CONNECTOR.
1) Turn ignition switch to OFF.
2) Disconnect connectors from purge control solenoid
valve and ECM.
3) Measure resistance of harness between purge control
solenoid valve connector and engine ground.
: Connector & terminal
(E4) No. 2—Engine ground:
Is the resistance less than 10Ω?
: Repair short circuit in harness between ECM and
purge control solenoid valve connector.
: Go to next step 4).
B2M0571A
4) Measure resistance of harness between ECM and
purge control solenoid valve of harness connector.
: Connector & terminal
(B84) No. 72—(E4) No. 2:
Is the resistance less than 1Ω?
: Go to step10AI4.
: Repair open circuit in harness between ECM and
purge control solenoid valve connector.
OBD0338
10AI4CHECK PURGE CONTROL SOLENOID
VA LV E .
1) Remove purge control solenoid valve.
2) Measure resistance between purge control solenoid
valve terminals.
: Terminals
No. 1—No. 2:
Is the resistance between 10 and 100Ω?
: Go to step10AI5.
: Replace purge control solenoid valve.
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10. Diagnostics Chart with Trouble Code

OBD0339A
10AI5CHECK POWER SUPPLY TO PURGE
CONTROL SOLENOID VALVE.
1) Turn ignition switch to ON.
2) Measure voltage between purge control solenoid valve
and engine ground.
: Connector & terminal
(E4) No. 1 (+)—Engine ground ():
Is the voltage more than 10 V?
: Go to next.
: Repair open circuit in harness between main relay
and purge control solenoid valve connector.
: Is there poor contact in purge control sole-
noid valve connector?
: Repair poor contact in purge control solenoid
valve connector.
: Contact with SOA service.
NOTE:
Inspection by DTM is required, because probable cause is
deterioration of multiple parts.
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10. Diagnostics Chart with Trouble Code

H2M1368
AJ: DTC P0446
—EVAPORATIVE EMISSION CONTROL
SYSTEM VENT CONTROL MALFUNCTION
(VCMSOL)—
DTC DETECTING CONDITION:

Two consecutive trips with fault
10AJ1Check output signal from ECM.

10AJ2Check harness between vent control solenoid
valve and ECM connector.
10AJ3Check harness between vent control solenoid
valve and ECM connector.
10AJ4Check vent control solenoid valve.
10AJ5Check power supply to vent control solenoid
valve.
CAUTION:
After repair or replacement of faulty parts, conduct
CLEAR MEMORY and INSPECTION MODES.
<Ref. to 2-7 [T3D0] and [T3E0].>



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10. Diagnostics Chart with Trouble Code

WIRING DIAGRAM:

LHD Model
B2M0920
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10. Diagnostics Chart with Trouble Code

WIRING DIAGRAM:

RHD Model
B2M1018
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10. Diagnostics Chart with Trouble Code

H2M1370B
10AJ1
CHECK OUTPUT SIGNAL FROM ECM.
1) Turn ignition switch to ON.
2) Measure voltage between ECM and chassis ground.
: Connector & terminal
(B84) No. 35 (+)—Chassis ground ():
Is the voltage more than 10 V?
: Go to step10AJ2.
: Go to step10AJ3.
H2M1370B
10AJ2CHECK HARNESS BETWEEN VENT
CONTROL SOLENOID VALVE AND ECM
CONNECTOR.
1) Turn ignition switch to OFF.
2) Disconnect connector from vent control solenoid valve.
3) Turn ignition switch to ON.
4) Measure voltage between ECM and chassis ground.
: Connector & terminal
(B84) No. 35 (+)—Chassis ground ():
Is the voltage more than 10 V?
: Repair short circuit in harness and replace ECM.
NOTE:
The harness between ECM and vent control solenoid valve
is in short circuit.
: Go to next step 5).
H2M1238A
5) Turn ignition switch to OFF.
6) Measure resistance between vent control solenoid
valve terminals.
: Terminals
No. 1—No. 2:
Is the resistance less than 1Ω?
: Replace vent control solenoid valve and ECM.
: Go to next.
: Is there poor contact in ECM connector?
: Repair poor contact in ECM connector.
: Replace ECM.
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10. Diagnostics Chart with Trouble Code