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Home >> Chevrolet >> 2006 >> Impala LTZ >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - 3.9L - DTC P0442 To DTC P2A01 >> DTC P0660 >> Circuit/System Description >> Variable Tuning Signal Circuit

Variable Tuning Signal Circuit

During operation when the valve is open the control module applies ground to the variable tuning signal circuit which indicates to the microprocessor within the IMT valve to position the valve to the closed position which turns the motor ON and rotates the IMT valve within the intake manifold plenum.