Evaporative Emission Control Canister: Testing and Inspection
INSPECTION1. INSPECT CANISTER ASSEMBLY
a. Visually check the canister for cracks or damage. If cracks or damage are found, replace the canister assembly.
b. Check canister operation.
1. With the purge port closed, blow 1.67 kPa (17.0 gf/sq.cm, 0.24 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 1.10 kPa (11.2 gf/sq.cm, 0.16 psi) of air into the 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 for air leakage.
1. Remove the air hose between ports A and B.
2. Connect the pressure gauge to the vent port of the canister.
3. While holding port B with the purge port and the air inlet port closed and port A open, apply 19.6 kPa (0.2 kgf/sq.cm, 2.81 psi) 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 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 leak detection pump.
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 leak detection pump.
5. Install the detection pump.