Evaporative Emission Canister Purge Solenoid Valve

Purge Control Solenoid Valve Circuit:

To test the Purge Control Solenoid Valve, located on the engine compartment firewall, proceed as follows.


COMPONENT TEST
1. Disconnect and mark the black and red-striped vacuum hoses from the solenoid.
2. Disconnect the electrical connector.

Fig. 16 Testing Purge Control Solenoid Valve:

3. Connect a hand vacuum pump to the port that the red-stripped hose was disconnected and apply vacuum.

Fig. 1 Purge Control Solenoid Valve Inspection (Operation):

4. Check for vacuum leak to opposite port when voltage is supplied and not supplied as per Fig. 1





5. Using an ohm meter, check the resistance between the terminals.

Resistance
36 - 44 ohms @68° F


HARNESS TEST
1. Disconnect the solenoid connector and turn the key to the ON position.
2. Using a voltmeter, measure voltage between the harness connector terminal 2 and ground.

Voltage:
System voltage.

3. Turn the key to the OFF position and disconnect the ECU connector.
4. Using an ohmmeter, check for continuity between the ECU harness connector terminal 16 and the solenoid harness connector terminal 1.

Continuity:
Should exist.

5. Using an ohmmeter, check for continuity between the solenoid harness connector terminal 1 and ground.

Continuity:
Should not exist.

If any of the previous tests produce unsatisfactory results, the harness will need to be repaired or replaced. Once repairs have been completed, road test the vehicle to confirm that the repair has corrected the problem.

If the same problem reoccurs, it is possible that there is an intermittent failure of the component or the ECU. Check for looseness at all harness junctions and test for an intermittent failure.