Evaporative Check Valve: Testing and Inspection

Checking Solenoid Valve For Vacuum:

SOLENOID VALVE

1. Warm up the engine to normal operating temperature.
2. Run the engine at idle.
3. Disconnect the vacuum hose from the charcoal cannister and check that no vacuum is felt.
4. If not as specified, disconnect the vacuum hose from the solenoid valve.

Solenoid Valve Inspection:

5. Blow through the solenoid valve from hose "A" and check that air does not flow from "B".

Checking Purge Control Valve:

6. Disconnect the solenoid valve connector and connect 12V and a ground to the terminals of the solenoid valve.
7. Check that air flows through the valve.
8. If not as specified, replace the solenoid valve.

SEPARATOR

Fuel Vapor Separator:

1. Pull back the right rear side trim.
2. Remove the cover.
3. Visually check the separator for cracks or leakage.
4. Replace the separator if necessary.

CHECK AND CUT VALVE

1. Remove the check and cut valve as follows:
a. Pull back the right rear side trim.
b. Remove the cover.
c. Disconnect the evaporative gas hoses.
d. Remove the check and cut valve.

Check And Cut Valve Testing:

2. Connect a pressure gauge to the passage from the fuel tank.
3. Blow through the valve from "A", and check to see that it opens at a pressure of 5.39-6.87 kPa (0.055-0.07 kg/cm2, 0.78-1.00 psi).
4. Remove the pressure gauge, and connect it to the passage to atmosphere.
5. Blow through the valve from "B", and check to see that the valve opens at a pressure of 0.98-4.9 kPa (0.01 -0.05 kg/cm2, 0.14-0.71 psi).

NOTE: This test should be performed with the valve held horizontally. Otherwise, the check balls in the valve will close the passages.

TWO WAY CHECK VALVE

1. Remove the valve.

Two Way Check Valve Inspection:

2. Blow through the valve from "A" and check that air flows.
3. Blow through the valve from "B" and check that air does not flow.