Circuit Operation
WARNING: This page is about a different car, the 2005 Dodge Stratus and 2005 Chrysler Sebring. However, it is still accessible from the selected car via links, so may be relevant.
This circuit activates the vacuum pump used to accelerate/decelerate, set, and cancel the vehicle speed. The auto-cruise control-ECU controls the control valve, release valve, and motor by turning the transistor in the ECU on and off.