P1446

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

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 5 seconds before conducting the next test.

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




4. Drive vehicle at a speed of approximately 80 kph (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
1. Start engine.
2. Drive vehicle at a speed of approximately 80 kph (50 MPH) for 15 minutes.
3. Select "MODE 7" with GST.
4. If 1st trip DTC is detected, go to "Diagnostic Procedure" below.

Without Scan Tool
1. Start engine.
2. Drive vehicle at a speed of approximately 80 kph (50 MPH) for 15 minutes.
3. Turn ignition switch "OFF" and wait at least 5 seconds.
4. Turn ignition switch "ON" and perform "Diagnostic Test Mode II (Self-diagnostic results)" with ECM.
5. If 1st trip DTC is detected, go to "Diagnostic Procedure" below.

EC-VENT/V-01:

EC-VENT/V-01 Connectors View:

Wiring Diagram

Step 1:

Step 2:

Step 3:

Step 4:

Step 5:

Step 6:

Step 7:

Step 8:

Step 9:

Diagnostic Procedure

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 control valve.

Make sure new O-ring is installed properly.




WATER SEPARATOR
1. Check visually for insect nests in the water separator air inlet.
2. Check visually for cracks or flaws in the appearance.
3. Check visually for cracks or flaws in the hose.
4. Check that A and C are not clogged by blowing air into B with A, and then C plugged.
5. In case of NG in items 2 - 4, replace the parts.

NOTE:
- Do not disassemble water separator.