Variable Induction Control Valve: Testing and Inspection

VICS SYSTEM OPERATIONAL CHECK

VICS System Operation Check:

1. Connect tachometer to "IG-" terminal of diagnosis connector.
2. Start engine and run at idle.
3. Verify that shutter valve actuator rod is pulled inward.
4. Gradually increase engine speed and verify that rod is extended when speed reaches 5000 rpm.

VACUUM CHECK

Shutter Valve Actuator:

1. Remove vacuum hose from actuator.
2. Verify that rod can move in and out freely.
3. Start engine and run at idle. Verify that manifold vacuum is present at actuator vacuum hose.
4. Install hose and verify that actuator rod is pulled inward.
5. Replace actuator if it does not hold vacuum.
6. If vacuum is not present at hose to actuator, correct cause of the problem.

VACUUM CHAMBER/RESERVOIR AND CHECK VALVE

Vacuum Chamber Testing:

1. Remove vacuum chamber
2. Blow through port "A" and verify no air flows from port "B."
3. Blow through port "B" and verify air flow from port "A."
4. Connect vacuum pump to port "B" and apply approx. 16" - 18" (400mm - 460mm) Hg vacuum, and hold.

Vacuum chamber should hold vacuum (a slight drop in vacuum over several minutes is acceptable).

If not as specified, replace vacuum chamber.

VACUUM SOLENOID VALVE CHECK

VICS Solenoid Valve Testing:

1. Remove valve and verify that air flows between ports as described on first image chart.
2. Connect 12V and a ground to solenoid terminals.
3. With solenoid energized, verify that air flows between ports as described on second image chart.
4. If not as specified, replace solenoid valve.