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: CONSULT-II Active Test

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

Fig 2: Test Specifications

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

OK or NG 

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