With CONSULT-II

1. Stop engine and disconnect vacuum hose connected to power valve actuator.
2. Start engine and let it idle.
3. Perform "VIAS SOL VALVE" in "ACTIVE TEST" mode with CONSULT-II.
   Fig 1: Scan Tool Display - Active test

   Courtesy of NISSAN MOTOR CO., U.S.A.
4. Turn VIAS control solenoid valve "ON" and "OFF", and check vacuum existence under the following conditions.
   Fig 2: Vacuum Applied Chart

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

OK or NG 

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