DTC P1443 Vent Control Solenoid Valve Function Problem

DTC DETECTING CONDITION:

Detect as soon as malfunction occurs.
GENERAL DESCRIPTION < Ref. to DTC P1443 VENT CONTROL SOLENOID VALVE FUNCTION PROBLEM , Diagnostic Trouble Code (DTC) Detecting Criteria. >

TROUBLE SYMPTOM:

Improper fuel supply

CAUTION: After repair or replacement of faulty parts, conduct CLEAR MEMORY MODE < Ref. to , OPERATION , Clear Memory Mode.> and INSPECTION MODE < Ref. to , PROCEDURE , Inspection Mode.>.

WIRING DIAGRAM:

Fig 1: DTC P1443 Circuit

Courtesy of SUBARU OF AMERICA, INC.

DTC P1443 DIAGNOSIS

Step	Check	Yes	No
1. CHECK FOR ANY OTHER DTC ON DISPLAY.	Is any other DTC displayed?	Inspect the relevant DTC using "List of Diagnostic Trouble Code (DTC)". < Ref. to , LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . >	Go to step 2.
2. CHECK VENT LINE HOSES. Check the following items. Clogging of vent hoses between canister and drain valve Clogging of vent hose between drain valve and air filter Clogging of drain filter	Is there any fault in vent line?	Repair or replace faulty parts.	Go to step 3.
3. CHECK DRAIN VALVE OPERATION. Turn ignition switch to OFF. Connect the test mode connector at the lower portion of instrument panel (on the driver's side). Turn ignition switch to ON. Check the drain valve. NOTE: Drain valve operation can also be executed using Subaru Select Monitor. For the procedure, refer to COMPULSORY VALVE OPERATION CHECK MODE .	Does the drain valve operate?	Contact SOA Service Center.	Replace the drain valve. < Ref. to DRAIN VALVE . >

Step

Check

Yes

1. CHECK FOR ANY OTHER DTC ON DISPLAY.

Is any other DTC displayed?

Inspect the relevant DTC using "List of Diagnostic Trouble Code (DTC)". < Ref. to , LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . >

Go to step 2.

2. CHECK VENT LINE HOSES.

Check the following items.

Clogging of vent hoses between canister and drain valve
Clogging of vent hose between drain valve and air filter
Clogging of drain filter

Is there any fault in vent line?

Repair or replace faulty parts.

Go to step 3.

3. CHECK DRAIN VALVE OPERATION.

Turn ignition switch to OFF.
Connect the test mode connector at the lower portion of instrument panel (on the driver's side).
Turn ignition switch to ON.
Check the drain valve.

NOTE: Drain valve operation can also be executed using Subaru Select Monitor. For the procedure, refer to COMPULSORY VALVE OPERATION CHECK MODE .

Does the drain valve operate?

Contact SOA Service Center.

Replace the drain valve. < Ref. to DRAIN VALVE . >