Variable Induction Control Actuator: Description and Operation

High Speed Inlet Air (HSIA) Control Solenoid:

PURPOSE

The High Speed Inlet Air (HSIA) solenoid controls the vacuum applied to the Inlet Air Shutter Valve Actuator.

OPERATION

The HSIA solenoid is controlled by an output signal from the PCM. The HSIA solenoid allows vacuum to close the shutter valve at low rpm. Above 5000 rpm, the solenoid vents actuator vacuum to atmosphere, allowing the shutter valve to open.