2013 KIA Optima — Owner's Manual – Page #272

Posted on 22 May, 2015
Model: 2013 KIA Optima
Pages: 382

File size: 9 MB

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Driving your vehicle
Hill-start assist control (HAC)
(if equipped)
Hill start Assist Control is a comfort func-
tion. The main intend is to prevent the
vehicle from rolling backwards while driv-
ing off uphill on an inclined surface. HAC
holds the braking pressure builtup by
driver during stopping procedure for 2
seconds after releasing brake pedal.
During the pressure-hold period, the
driver has enough time to press the
accelerator pedal to drive off.
The braking pressure is reduced as soon
as the system detects the driver’s inten-
tion to drive off.
The HAC does not operate when the
transaxle shift lever is in the P (Park)
or N (Neutral) position.
The HAC activates even though the
ESP is off but it does not activate
when the ESP has malfunctioned.
Never press the ESC OFF button
while ESC is operating.
If the ESC is turned off while ESC is
operating, the vehicle may go out of
To turn ESC off while driving, press
the ESC OFF button while driving
on a flat road surface.
The HAC is usually activated only
for 2 seconds.The driver should be
careful from the rolling backward
causing the accident with behind
objects or human, when the driver
may feel the unintended rolling
backward while driving off on hill
due to insufficient brake hold pres-
sure built-up by driver during stop-
ping procedure.

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