Kia 2017 Rio, Owner'S Manual, Page: 343 / 532

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Driving your vehicle
Hill-start assist control (HAC)
Hill start Assist Control is a comfort
function. The intent is to prevent the
vehicle from rolling backwards from
a stop, on initial take-off while on an
inclined. HAC holds the braking pres-
sure builtup by driver during stopping
procedure for 2 seconds after releas-
ing 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 dri-
ver’s intention 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 ESC is off but it does not acti-
vate when the ESC has malfunc-
tioned.
Vehicle stability management
(VSM)
This system provides further
enhancements to vehicle stability
and steering responses when a vehi-
cle is driving on a slippery road or a
vehicle detected changes in coeffi-
cient of friction between right wheels
and left wheels when braking.
VSM operation
When the VSM is in operation, ESC
indicator light (
) blinks.
When the vehicle stability manage-
ment is operating properly, you can
feel a slight pulsation in the vehicle.
This is only the effect of brake control
and indicates nothing unusual.
✽ ✽
NOTICE
No system, no matter how advanced,
can compensate for all driver error
and/or driving conditions. Always
drive responsibly.
WARNING
- Maintaining
Brake Pressure on Incline
HAC does not replace the need
to apply brakes while stopped on
an incline. While stopped, make
sure you maintain brake pres-
sure sufficient to prevent your
vehicle from rolling backward
and causing an accident. Don’t
release the brake pedal until you
are ready to accelerate forward.