Without CONSULT-II

1. Stop engine and disconnect vacuum hose connected to power valve actuator.
2. Disconnect VIAS control solenoid valve harness connector.
3. Start engine and let it idle.
4. Apply 12V of direct current between VIAS control solenoid valve terminals 1 and 2.
   Fig 1: Apply 12V Of Direct Current

   Courtesy of NISSAN MOTOR CO., U.S.A.
5. Check vacuum existence under the following conditions.

Fig 2: Test Parameters

Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG 

1. OK : Repair or replace power valve actuator.
2. NG : GO TO 4.