If any method other than the
button
was used to cancel cruising speed and
the system is still activated, the most
recent set speed will automatically
resume when the +RES switch is
pushed.
It will not resume, however, if the vehicle speed has dropped below approximately 30 km/h (20 mph).
Kia Cee'd JD Service Manual: Power Mosfet (DATC) Repair procedures
Inspection
1.
Turn the ignition switch ON.
2.
Manually operate the control switch and measure the voltage of the blower
motor.
3.
Select the control switch to raise the voltage until high speed.
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Kia Cee'd JD Service Manual: Front Seat Assembly Components and components location
Component Location
1. Front seat assembly
...