2. Check Vacuum Existence

WARNING: This page is about a different car, the 2004 Infiniti Q45. However, it is still accessible from the selected car via links, so may be relevant.

With CONSULT-II

Stop engine and disconnect vacuum hose connected to power valve actuator.
Start engine and let it idle.
Perform "VIAS SOL VALVE" in "ACTIVE TEST" mode with CONSULT-II.
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.