Canister Purge Solenoid: Testing and Inspection

Fig. 160 System Check:

SYSTEM INSPECTION

NOTE: Check the condition of the wiring harness and/or vacuum lines and connectors before checking the sensors or switches.

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


CHARCOAL CANISTER

1. Visually inspect the cannister for signs of damage of cracks. Replace the cannister if necessary.

Fig. 161 Fuel Vapor Valve:

FUEL VAPOR VALVE

1. Remove the valve.
2. Blow through the valve and verify that air flows in the direction shown.

Fig. 162 Fuel Vapor Test:

3. Turn the valve over and blow through the valve. Verify that no air flows through the valve.
4. Replace the valve if necessary.


SOLENOID VALVE (PURGE CONTROL)

1. Disconnect the vacuum hoses from the solenoid valve.
2. Verify that no air can pass through the solenoid valve.

Fig. 118 Solenoid Valve Test:

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

Fig. 152 Two-Way Valve:

TWO-WAY CHECK VALVE

1. Remove the check valve.
2. Check the operation of the valve with a vacuum pump.
3. Apply approximately 37 mmHg (1.46 in.Hg) of vacuum at port "A" verify that air flows through the valve.
4. Apply approximately 44 mmHg (1.73 in.Hg) of vacuum at port "A" verify that air flows through the valve.
5. Replace the valve if not to specification.