Canister Vent Valve: Testing and Inspection

CHARCOAL CANISTER, CANISTER VENT (CV) SOLENOID VALVE, AIR FILTER COMPONENT INSPECTION [MZI-3.7]

Airflow Inspection

1. Disconnect the negative battery cable. Removal and Replacement

2. Remove the charcoal canister, CV solenoid valve, air filter component. Service and Repair

3. Plug the purge solenoid valve side of the charcoal canister.






4. Pressurizing from the fuel tank side of the charcoal canister, verify that there is no leak from the charcoal canister and that the CV solenoid valve is closed.

- If malfunction, replace the charcoal canister, CV solenoid valve, air filter component. Service and Repair

5. Connect the battery positive voltage to CV solenoid valve terminal A.






6. Pressurizing from the fuel tank side of the charcoal canister, verify that the CV solenoid valve is open and that there is airflow through the air filter.

- If malfunction, replace the charcoal canister, CV solenoid valve, air filter component. Service and Repair

7. Pressurizing from the air filter side, verify that the CV solenoid valve is open and that there is airflow through the air filter.

- If malfunction, replace the charcoal canister, CV solenoid valve, air filter component. Service and Repair

CV Solenoid Valve Circuit Open/Short Inspection

1. Disconnect the PCM connector.

2. Inspect the following wiring harness for open or short circuit (continuity check).











Open circuit
- If there is no continuity, there is an open circuit. Repair or replace the wiring harness.

- CV solenoid valve terminal B and PCM terminal 1Z
- CV solenoid valve terminal A and battery

Short circuit
- If there is continuity, there is a short circuit. Repair or replace the wiring harness

- CV solenoid valve terminal B and power supply
- CV solenoid valve terminal B and body ground