Evaporative Emission Control Canister: Testing and Inspection

INSPECT CHARCOAL CANISTER ASSEMBLY




a. Visually check the charcoal canister for cracks or damage. If cracks or damage are found, replace the charcoal canister assembly.

b. Check charcoal canister operation.




1. While holding the purge port closed, blow air 1.67 kPa (17.0 gf/sq.cm, 0.24 psi) to the vent port, and check that the the air flows from the air inlet port.
If the result is not as specified, replace the charcoal canister assembly.




2. While holding the vent port closed, blow air to the air inlet port 1.10 kPa (11.2 gf/sq.cm, 0.16 psi) to the purge port, and check that the air flows from the purge port.
If the result is not as specified, replace the charcoal canister assembly.




c. Check the air leakage.
1. Remove the air hose between ports A and B.
2. Connect the pressure gauge to the vent port of the charcoal canister.

SST 09992-00242

3. While holding port B, the purge port and the air inlet port closed and port A open, apply pressurized air 19.6 kPa (0.2 kgf/sq.cm, 2.81 psi) to the vent port, then confirm that the pressure is retained. If the result is not as specified, replace the charcoal canister assembly.

d. Check leak detection pump.




1. Check that air flows from port A to ports B and C.
If the result is not as specified, replace the charcoal canister assembly.




2. Apply battery positive voltage across the terminals.
3. Check that the valve is closed.
If the result is not as specified, replace the charcoal canister assembly.