Kia Sedona: SCC will be temporarily canceled when
Cancelled manually
The SCC turns off temporarily when the indicator on the LCD display turns off.
The CRUISE indicator is illuminated continuously.
Cancelled automatically
Each of these actions will cancel the SCC operation. (the SET indicator, set speed and vehicle to vehicle distance on the LCD display will go off.)
In a condition the SCC is cancelled automatically, the SCC will not resume even though the RES+ or SET- lever is moved.
If the SCC is cancelled by other than the reasons mentioned, have the system checked by an authorized Kia dealer.

If the system is automatically cancelled, the warning chime will sound and a message will appear for a few seconds.
You must adjust the vehicle speed by depressing the accelerator or brake pedal according to the road condition ahead and driving condition.
Always check the road conditions. Do not rely on the warning chime.
To temporarily accelerate with the cruise control on
To resume cruise control set speedOverdrive Clutch Control Solenoid Valve(OD/C_VFS) Description and Operation
Description
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Overdrive clutch control solenoid valve is a Variable Force Solenoid (VFS) type.
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When TCM supplies variable current to solenoid valve, hydraulic pressure of und ...
On inclines
During uphill or downhill driving, the SCC may not detect a moving vehicle
in your lane, and cause your vehicle to accelerate to the set speed. Also, the
vehicle speed will rapidly slow dow ...