Evaporative Emission Control Canister: Testing and Inspection

4GR-FSE EMISSION CONTROL: CANISTER: INSPECTION

1. 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 canister operation.

(1) With the purge port closed, blow 5 kPa (0.1 kgf/cm2, 0.7 psi) of air into the vent port, and check that air flows from the air inlet port.





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If the result is not as specified, replace the charcoal canister assembly.

(2) With the vent port closed, blow 5 kPa (0.1 kgf/cm2, 0.7 psi) of air into the air inlet port, and check that air flows from the purge port.





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If the result is not as specified, replace the charcoal canister assembly.

(c) Check for air leaks.

(1) Remove the air hose between ports A and B.

(2) Connect a pressure gauge to the vent port of the charcoal canister assembly.





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(3) While holding port B, with the purge port and the air inlet port closed and port A open, apply 20 kPa (150 mmHg, 5.91 in.Hg) of pressurized air into the vent port, then confirm that pressure is retained for 1 minute.

If the result is not as specified, replace the charcoal canister assembly.

(d) Check the leak detection pump.

(1) Remove the canister pump module.

(2) Check that air flows from port A to port B and C.





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If the result is not as specified, replace the charcoal canister assembly.

(3) Connect the positive (+) lead of the battery to terminal 9 and the negative (-) lead to terminal 8.





(4) Check that the valve is closed.

If the result is not as specified, replace the charcoal canister assembly.

(5) Install the canister pump module.