2. Check Vacuum Existence

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.
4. Turn VIAS control solenoid valve "ON" and "OFF", and check vacuum existence under the following conditions.

Fig 1: Testing Conditions

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

OK OR NG 

OK: Repair or replace power valve actuator.

NG: GO TO 4.