Power Valve (Maxima): Actuator
Disconnect vacuum hose from actuator, located on timing belt end of upper intake plenum. Apply and release vacuum at actuator diaphragm. If rod does not move, replace actuator.
NOTE:
On some power valve control solenoids, port "C" may be a vent that is capped with a filter. Also, if solenoid does not respond as specified, perform test again, considering port "A" as port "B" and vice versa.