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Home >> Kia >> 2015 >> Optima EX >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System Diagnosis (2 Of 3) - 2.4L (Except HEV) >> DTC P0564: Cruise Control Multi-Function Input A Circuit >> General Information >> General Description
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General Information: General Description

The Cruise Control (CC) system keeps the vehicle running at a fixed speed until a signal canceling this fixed speed is received. When the PCM receives a signal from the cruise control switch, the PCM commands the Electronic Throttle Control (ETC) motor to hold the vehicle at the current (set) speed. The same circuit between the switches and the PCM is used for all switch functions. When a switch is pressed, the voltage changes on the signal wire. While the system is operating, the "CRUISE" indicator lamp in the instrument cluster lights up.