XC90 AWD V8-4.4L VIN 85 B8444S (2005)
Connect power to solenoid. Solenoid should click.
Blow through center hole with compressed air.
Air should emerge from outer hole (2).
If plunger is sticking or solenoid fails to operate electrically, the direction of flow will be unchanged from step 1.
VVT solenoid, cleaning