P0446

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 (Small Leak)" diagnosis.




CONSULT Reference Value in Data Monitor Mode
Specification data are reference values.




ECM Terminals and Reference Value
Specification data are reference values and are measured between each terminal and 32 (ECM ground).

On Board Diagnosis Logic:

DTC Confirmation Procedure

NOTE: If "DTC Confirmation Procedure" has been previously conducted, always turn ignition switch "OFF" and wait at least 5 seconds before conducting the next test.

TESTING CONDITION:
Before performing the following procedure, confirm battery voltage is more than 11V at idle.

With CONSULT
1. Turn ignition switch "ON".
2. Select "DATA MONITOR" mode with CONSULT




3. Start engine and wait at least 8 seconds.
4. If 1st trip DTC is detected, go to "Diagnostic Procedure" below.

With GST
1. Start engine and wait at least 8 seconds.
2. Select "MODE 7" with GST.
3. If 1st trip DTC is detected, go to "Diagnostic Procedure" below.

Without Scan Tool
1. Start engine and wait at least 8 seconds.
2. Turn ignition switch "OFF", wait at least 5 seconds and then turn "ON".
3. Perform "Diagnostic Test Mode II (Self-diagnostic results)" with ECM.
4. If 1st trip DTC is detected, go to "Diagnostic Procedure" below.

EC-VENT/V-01:

EC-VENT/V-01 Connectors View:

Wiring Diagram

Diagnostic Procedure

Step 1:

Step 2:

Step 3:

Step 4:

Step 5:

Step 6:

Step 7:

Step 8:

Component Inspection
Check air passage continuity.




With CONSULT
Perform "VENT CONTROL/V" in "ACTIVE TEST" mode.

Condition VENT CONTROL/V Air passage continuity between A and B
ON No
OFF Yes




Without CONSULT

Condition: Air passage continuity between A and B
12V direct current supply between terminals 1 and 2: No
No supply: Yes

If NG or operation takes more than 1 second, clean valve using air blower or replace as necessary.
If portion B is rusted, replace EVAP canister vent control valve.
Make sure new O-ring is installed properly.