P1446

DTC P1446 EVAP CANISTER VENT CONTROL VALVE







Component Description
The EVAP canister vent control valve is located on the EVAP canister and is used to seal the canister vent.

This solenoid valve responds to signals from the ECM. When the ECM sends an ON signal, the coil in the solenoid valve is energized. A plunger will then move to seal the canister vent. The ability to seal the vent is necessary for the on board diagnosis of other evaporative emission control system components.

This solenoid valve is used only for diagnosis, and usually remains opened.

When the vent is closed, under normal purge conditions, the evaporative emission control system is depressurized and allows "EVAP Control System" diagnosis.

Consult-II Reference Value In Data Monitor Mode:

On Board Diagnosis Logic:

DTC Confirmation Procedure

CAUTION: Always drive vehicle at a safe speed.

NOTE: If "DTC Confirmation Procedure" has been previously conducted, always turn ignition switch "OFF" and wait at least 10 seconds before conducting the next test.

WITH CONSULT-II
1. Turn ignition switch "ON".
2. Select "DATA MONITOR" mode with CONSULT-II.
3. Start engine.




4. Drive vehicle at a speed of approximately 80 km/h (50 MPH) for a maximum of 15 minutes.

NOTE: If a malfunction exists, NG result may be displayed quicker.

5. If 1st trip DTC is detected, go to "Diagnostic Procedure" below.

WITH GST
Follow the procedure "WITH CONSULT-II" above.

EC-VENT/V-01:

Wiring Diagram

Diagnostic Procedure Step 1 - 3:

Diagnostic Procedure Step 4 - 9:

Diagnostic Procedure

Component Inspection

EVAP CANISTER VENT CONTROL VALVE

With CONSULT-II
1. Remove EVAP canister vent control valve from EVAP canister.




2. Check portion B of EVAP canister vent control valve for being rusted.
If NG, replace EVAP canister vent control valve.
If OK, go to next step.

3. Reconnect harness connectors disconnected.
4. Turn ignition switch "ON".
5. Perform "VENT CONTROL/V" in "ACTIVE TEST" mode.







6. Check air passage continuity and operation delay time.
If NG, replace EVAP canister vent control valve.
If OK, go to next step.

7. Clean the air passage (Portion A to B) of EVAP canister vent control valve using an air blower.
8. Perform step 6 again.

Without CONSULT-II
1. Remove EVAP canister vent control valve from EVAP canister.




2. Check portion B of EVAP canister vent control valve for being rusted.







3. Check air passage continuity and operation delay time under the given conditions.
Make sure new O-ring is installed properly.
If NG, replace EVAP canister vent control valve.
If OK, go to next step.

4. Clean the air passage (Portion A to B) of EVAP canister vent control valve using an air blower.
5. Perform step 3 again.