Evaporative Emission Control Canister: Testing and Inspection

3UZ-FE EMISSION CONTROL: CANISTER: INSPECTION

INSPECTION

1. INSPECT CANISTER ASSEMBLY





(a) Visually check the canister for cracks or damage.
If cracks or damage are found, replace the canister assembly.
(b) Check the canister operation.




(1) With the purge port closed, blow 0.39 kPa (4.0 kgf/cm2 0.06 psi) of air into the vent port, and check that air flows from the air inlet port.
If the result is not as specified, replace the canister assembly.




(2) With the vent port closed, blow 0.39 kPa (4.0 kgf/cm2 0.06 psi) of air inlet port, and check that air flows from the purge port.
If the result is not as specified, replace the canister assembly.





(c) Check the airtightness.
(1) While holding the vent and air inlet ports closed, apply vacuum (3.43 kPa, 25.7 mmHg, 1.01 in.Hg) to the purge port, and check that the vacuum is maintained for 1 minute.
If the result is not as specified, replace the canister assembly.
(d) Check the leak detection pump.




(1) Remove the detection pump from the canister.
(2) Check that air flows from port A to B and then to C.
If the result is not as specified, replace the canister assembly.




(3) Connect the positive (+) lead of the battery to terminal 7 and the negative (-) lead to terminal 6.
(4) Check that the valve is closed.
If the result is not as specified, replace the canister assembly.
(5) Install the detection pump.