Circuit/System Description

WARNING: This page is about a different variant/trim than selected.

An intake manifold tuning valve is used to change the intake manifold plenum configuration. When the intake manifold tuning valve is open, the intake manifold is configured to one large plenum. When the intake manifold tuning valve is closed, the intake manifold is configured to two smaller plenums. The intake manifold tuning valve improves engine performance at low and high engine speeds.

Ignition voltage is supplied directly to the intake manifold tuning valve solenoid. The engine control module (ECM) controls the solenoid by grounding the control circuit with a solid state device called a driver. The driver is equipped with a feedback circuit that is pulled up to a voltage. The ECM can determine if the control circuit is open, shorted to ground, or shorted to a voltage by monitoring the feedback voltage.

The intake manifold tuning valve also contains a position sensor which is used to detect the actual position of the intake manifold tuning valve in relation to its commanded position. The ECM supplies the intake manifold tuning valve position sensor with a 5 V signal circuit and the position sensor uses a common ground circuit. The position sensor enables the ECM to detect a physically broken or stuck intake manifold tuning valve.