Circuit Description
WARNING: This page is about a different car, the 2004 Saturn Ion Red Line, 2004 Saturn Ion 3, 2004 Saturn Ion 2, and 2004 Saturn Ion 1. However, it is still accessible from the selected car via links, so may be relevant.
The cruise control switch is an input to the engine control module (ECM). The switch has 4 positions: On, Off, Resume/Accel, and Set/Coast. Switch voltage at the ECM varies depending on switch position. If the ECM detects a switch voltage that is out of range for longer than 3 seconds, DTC P0565 sets.