Liquid Vapor Separator: Testing and Inspection

SOLENOID VALVE (PURGE CONTROL) ON VEHICLE TESTING

1. Warm up the engine to normal operating temperature.
2. Run the engine at idle.

Checking For Vacuum At Solenoid Valve:

3. Disconnect the vacuum hose (White) from the solenoid valve and check that no vacuum is felt at the solenoid valve.
4. If not as specified, check the solenoid valve.


SOLENOID VALVE (PURGE CONTROL) OFF VEHICLE TESTING

Purge Control Solenoid Valve:

1. Disconnect the vacuum hoses from the charcoal canister and the dynamic chamber.
2. Check that no air flows through the valve.

Testing Solenoid Valve:

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


SEPARATOR

1. Remove the fuel tank.

Fuel Vapor Separator:

2. Visually check the separator for damage, replace it if necessary.

TWO-WAY CHECK VALVE

1. Remove the valve.

Two Way Check Valve:

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


CHECK-AND-CUT VALVE

1. Remove the check-and-cut valve.

Check And Cut Valve Testing:

2. Connect a pressure gauge to the passage connected to the fuel tank.
3. Blow through the valve from port "A" and verify that the valve opens at 5.39-6.87 kPa (0.055-0.07 kg/sq cm, 0.78-1.00 psi).
4. Remove the pressure gauge and connect it to the passage to atmosphere.
5. Blow through the valve from port "B" and verify that the valve opens at 0.98-4.91 kPa (0.01 -0.05 kg/sq cm, 0.14-0.71 psi).

NOTE: The test must be performed with the valve held horizontally. Otherwise, the ball in the valve will move out of position and close the passage.

CHARCOAL CANISTER

Charcoal Canister:

Visually check for damage and replace the charcoal canister if necessary.