Variable Induction Control Solenoid: Description and Operation

Solenoids:

The Variable Resonance Induction System Solenoids #1 (VRIS1) and #2 (VRIS2) are operated by output signals from the Powertrain Control Module (PCM).

Actuators And Shutter Valves:

When the solenoids are activated, they allow vacuum to be applied to the shutter valve actuators. The shutter valve actuators then manipulate the shutter valves inside the intake manifold. This process improves charging efficiency and torque characteristics.