Evaporative Emission Control Canister: Testing and Inspection

2UZ-FE EMISSION CONTROL: CANISTER: INSPECTION

INSPECTION

1. INSPECT CHARCOAL CANISTER ASSEMBLY





(a) Visually check the charcoal canister for cracks and damage.
If there is any cracks or damage, replace the charcoal canister assembly.
(b) Check the charcoal canister operation.




(1) While holding the purge port closed, blow air at 1.67 kPa (17.0 gf/cm2, 0.24 psi) into the vent port, and check that 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, apply a vacuum of 1.10 kPa (8.3 mmHg, 0.32 in.Hg) into the purge port, and check that the air flows from the air inlet port.
If the result is not as specified, replace the charcoal canister assembly
(c) Check for 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.
(3) While holding port B, the purge port and air inlet port closed with your fingers, leave port A open and apply pressurized air at 19.6 kPa (0.2 kgf/cm2, 2.81 psi) into the vent port. Check that the pressure is retained.
If the result is not as specified, replace the charcoal canister assembly
(d) Check the 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 pump module.




(2) Apply battery positive voltage across the terminals.
(3) Check that the valve is closed.
If the result is not as specified, replace the pump module.