Evaporative Emission Control Canister: Testing and Inspection

CHARCOAL CANISTER INSPECTION

1. Remove charcoal canister





2. Visually inspect charcoal canister.
Look for cracks or damage.
3. Check for clogged filter, and stuck check valve and diaphragm.
(a) Install the plug to port E.





(b) While holding port B closed, blow air (1.76 kPa, 18 gf/sq.cm, 0.26 psi) into port A and check that air flows from p9rt D.





(c) 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.





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





(e) 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.
(f) Remove the plug.
4. Reinstall charcoal canister.