EGR/PHV Solenoid Test (Light Duty-GVW 8500 LBS or Less)

1. Remove vacuum hoses. With the solenoid wire disconnected air should flow from the vacuum port through the vent port. Energize the solenoid, air should flow through both vacuum ports. If either test fails, the solenoid valve must be replaced.
2. Disconnect electrical connector from solenoid valve.
3. Connect either solenoid terminal to a ground and the other one to the battery positive terminal, then listen for clicking noise from solenoid as it is connected to battery positive terminal.
4. If the solenoid does not click, then connect a voltmeter to the gray wire of the solenoid and ground. Voltmeter should read within 1 volt of battery voltage. If voltage is OK, then replace the solenoid. If voltage is less than battery voltage, then check for power back through the circuit. Trace the power back through the wiring harness to find where power is being lost.