Resonator: Description and Operation

Intake Air Resonator System:

Intake Air Resonator (IAR) Control System Diagram:

PURPOSE
Provides additional air intake silencing and improves engine torque at mid-range rpm.

OPERATION
When the Engine Control Module senses engine speed below 2,900 RPM, the Intake Air Resonator (IAR) control solenoid valve is deactivated and intake air does not flow from the IAR. At engine speeds between 2,900 and 3,700 rpm (mid-range), the solenoid valve is activated by a signal from the Engine Control Module and intake air flows from the IAR.