Evaporative Emission Control Canister: Testing and Inspection

CHARCOAL CANISTER INSPECTION

1. REMOVE CHARCOAL CANISTER
(a) Disconnect the EVAP hoses (vacuum hose and air hose) from charcoal canister.
(b) Disconnect the grommet on the check valve from the bracket and remove the charcoal canister.

3. VISUALLY INSPECT CHARCOAL CANISTER
Look for cracks or damage.
4. CHECK FOR CLOGGED FILTER AND STUCK CHECK VALVE

(a) While holding ports C and D closed, using low pressure compressed air (19.6 kPa (0.2 kgf/sq.cm, 2.8 psi)), blow into port A and check that air flows without resistance from port B.

(b) While holding port B closed, using low pressure compressed air (19.6 kPa (0.2 kgf/sq.cm, 2.8 psi)), blow into port A and check that air flows without resistance from ports C and D.

(c) Blow low pressure compressed air (19.6 kPa (0.2 kgf/ sq.cm, 2.8 psi)) into port B and check that air does not flow from the other ports.

(d) Apply vacuum (9.8 kPa, 73.5 mmHg, 2.9 in.Hg) to port A and check that the vacuum gauge indicator will settle at about 1.0 kPa (7.5 mmHg, 0.3 in.Hg).
If operation is not as specified, replace the charcoal canister.
5. REINSTALL CAP TO CHARCOAL CANISTER

6. CLEAN FILTER IN CANISTER
Clean the filter by blowing 294 kPa (3 kgf/sq.cm, 43 psi) of compressed air into port A while holding port B closed.

NOTICE :
- Do not attempt to wash the canister.
- No activated carbon should come out.

7. REINSTALL CHARCOAL CANISTER