XC90 2.5T AWD L5-2.5L Turbo VIN 59 B5254T2 (2003)
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
Remove solenoid from aluminum housing.
snap ring (1)
washer (2), spring (3) and plunger (4).