Evaporative Emission Control Canister: Testing and Inspection

CHARCOAL CANISTER INSPECTION
1. REMOVE CHARCOAL CANISTER
2. VISUALLY INSPECT CHARCOAL CANISTER
- Look for cracks or damage. Apply a stopper to the port (1) connect.






3. CHECK FOR CLOGGED FILTER, AND STUCK CHECK VALVE AND DIAPHRAGM
- While holding port B closed, blow air (1.47 kPa, 15 gf/sq. cm, 0.21 psi) into port A and check that air flows from port D.





- While holding port B and port D closed, blow air (1.76 kPa, 18 gf/sq. cm, 0.26 psi) into port A and check that air does not flow from port C.





- Apply vacuum (3.43 kPa, 25.7 mmHg, 1.01 in.Hg) to port B, check that the vacuum does not decrease when port C is closed, and check that the vacuum decreases when port C is released.





- While holding port C closed. apply vacuum (3.43 kPa, 25.7 mmHg, 1.01 in.Hg) to port A and check that air flows into port B.
- If a problem is found, replace the charcoal canister.
- Apply stopper to the port (1) reconnect.
4. REINSTALL CHARCOAL CANISTER