Evaporative Emission Control Canister: Testing and Inspection

EVAPORATIVE (EVAP) CANISTER

For evaporation monitoring, there is a canister close valve (CCV), a two-way valve and an air filter as shown in the illustration.

Canister Visual Inspection







1. Look for loose connections, sharp bends or damage to the fuel vapor lines.
2. Look for distortion, cracks or fuel leakage.
3. After removing the EVAP Canister, inspect for cracks or damage.

Operational Inspection-Canister Close Valve




1. Connect the CCV pins to a wire as shown.
2. At idle, disconnect the CCV connector.
3. Inspect that CCV is close when attaching the wire to (-) of battery.
4. Inspect that CCV is open when detaching the wire from (-) of battery.





NOTE: Use a very thin paper and attach it to the hose on CCV and observe the CCV operation/condition.

1) If the paper is absorbed into or out, CCV is open.
2) If not, CCV is closed.

Two-Way Valve Inspection




1. Inspect whether air flows as shown.
2. Verify valve is installed correctly, use the arrow mark on the valve for reference.

Canister Air filter Inspection
Look for distortion, cracks.