brake KIA OPTIMA HYBRID 2019 Repair Manual

Driving your vehicle
36
6
ESC operation
ESC ON condition
When the engine start/stopbutton is turned ON, ESC
and ESC OFF indicator
lights illuminate for approxi-
mately 3 seconds, then
ESC is turned on.
ton for at least half a sec-
ond after turning the igni-
tion ON to turn ESC off.
(ESC OFF indicator will
illuminate). To turn the
ESC on, press the ESC
OFF button (ESC OFF
indicator light will go off).
you may hear a slight tick-
ing sound. This is the ESC
performing an automatic
system self-check and does
not indicate a problem. When operating
When the ESC is in opera-
tion, the ESC indicator light
blinks.
Stability Control is operat-
ing properly, you can feel a
slight pulsation in the vehi-
cle. This is only the effect
of brake control and indi-
cates nothing unusual.
mud or driving on a slip-
pery road, pressing the
accelerator pedal may not
cause the engine rpm
(revolutions per minute) to
increase.
ESC operation off
ESC OFF state
This car has 2 kinds of ESC
off states.
If the engine stops when
ESC is off, ESC remains off.
Upon restarting the engine,
the ESC will automatically
turn on again.
-

637
Driving your vehicle
ESC off state 1
To turn off the traction control func-
tion and the brake control function to
ESC operation, press the ESC OFF
button (ESC OFF ) for less than 3
seconds (ESC OFF indicator light
(ESC OFF ) will illuminate). At this
state, only the brake control function
will operate.
To turn off the traction control func-
tion and the brake control function to
ESC operation, press the ESC OFF
button (ESC OFF ) for more than 3
seconds. ESC OFF indicator light
(ESC OFF ) will illuminate and the
ESC OFF warning chime will sound.
At this state, the car stability control
function does not operate any more.
Indicator light
When engine start/stop button is
turned to ON, the indicator light illu-
minates, then goes off if the ESC
system is operating normally.
The ESC indicator light blinks when-
ever ESC is operating or illuminates
when ESC fails to operate.
The ESC OFF indicator light comes
on when the ESC is turned off with
the button.
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■
ESC indicator light
■ ESC OFF indicator light

Driving your vehicle
38
6
ESC OFF usage
When driving
ESC should be turned on for daily
driving whenever possible.
To turn ESC off while driving, press the ESC OFF button while driving
on a flat road surface.
✽ ✽ NOTICE
• When operating the vehicle on a
dynamometer, ensure that the
ESC is turned off (ESC OFF light
illuminated). If the ESC is left on,
it may prevent the vehicle speed
from increasing, and result in false
diagnosis.
• Turning the ESC off does not affect ABS or brake system opera-
tion.WARNING- Electronic sta-
bility control
Drive carefully even though your
vehicle has Electronic Stability
Control. It can only assist you in
maintaining control under cer-
tain circumstances.
WARNING- Operating ESC
Never press the ESC OFF but-
ton while ESC is operating (ESC
indicator light blinks).
If ESC is turned off while ESC is
operating, the vehicle may slip
out of control.

639
Driving your vehicle
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 detects 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
and/or abnormal steering responses
(EPS- Electronic Power Steering).
This is only the effect of brake and
EPS control and indicates nothing
unusual.
The VSM does not operate when:
Driving on a sloping road such as agradient or incline
Driving in reverse
ESC OFF indicator light ( ) remains on the instrument cluster
EPS indicator light remains on the instrument cluster
VSM operation off
If you press the ESC OFF button to
turn off the ESC, the VSM will also
cancel and the ESC OFF indicator
light ( ) illuminates.
To turn on the VSM, press the button
again. The ESC OFF indicator light
goes out.
WARNING- Tire/
Wheel size
When replacing tires and wheels,
make sure they are the same size
as the original tires and wheels
installed. Driving with varying
tire or wheel sizes may diminish
any supplemental safety benefits
of the VSM system.WARNING- Vehicle stabili-
ty management
Drive carefully even though
your vehicle has vehicle stabili-
ty management. It can only
assist you in maintaining con-
trol of the vehicle under certain
circumstances.

Driving your vehicle
40
6
Malfunction indicator
The VSM can be deactivated even if
you don’t cancel the VSM operation
by pressing the ESC OFF button. It
indicates that a malfunction has
been detected somewhere in the
Electric Power Steering system or
VSM system. If the ESC indicator
light ( ) or EPS warning light
remains on, take your vehicle to an
authorized Kia dealer and have the
system checked.
✽ ✽
NOTICE
• The VSM is designed to function
above approximately 13 mph (22
km/h) on curves.
• The VSM is designed to function above approximately 6 mph (10
km/h) when a vehicle is braking on
a split-mu surface. A split-mu sur-
face is made of two surfaces which
have different friction forces.
The Vehicle Stability Management
system is not a substitute for safe
driving practices but a supplemen-
tary function only. It is the respon-
sibility of the driver to always check
the speed and the distance to the
vehicle ahead. Always hold the
steering wheel firmly while driving.
Your vehicle is designed to activate according to the driver’s intention,
even with installed VSM. Always fol-
low all the normal precautions for
driving at safe speeds for the condi-
tions – including driving in inclement
weather and on a slippery road.Hill-start assist control (HAC)
A vehicle has the tendency to roll
back on a steep hill when it starts to
go after stopping. The Hill-start
Assist Control (HAC) prevents the
vehicle from rolling back by applying
the brakes automatically for about 2
seconds. The brakes are released
when the accelerator pedal is
depressed or after about 2 seconds.
The HAC is activated only for about 2
seconds, so when the vehicle is
starting off always depress the accel-
erator pedal.
WARNING
For maximum protection, always
wear your seat belt. No system,
no matter how advanced, can
compensate for all driver error
and/or driving conditions.
Always drive responsibly.

641
Driving your vehicle
Good braking practices
Check to be sure the parking brakeis not engaged and the parking
brake indicator light is out before
driving away.
Driving through water may get the brakes wet. They can also get wet
when the vehicle is washed. Wet
brakes can be dangerous! Your
vehicle will not stop as quickly if the
brakes are wet. Wet brakes may
cause the vehicle to pull to one side.
To dry the brakes, apply the brakes
lightly until the braking action
returns to normal, taking care to
keep the vehicle under control at all
times. If the braking action does not
return to normal, stop as soon as it
is safe to do so and call an author-
ized Kia dealer for assistance.
Don't coast down hills with the vehicle out of gear. This is extreme-
ly hazardous. Keep the vehicle in
gear at all times, use the brakes to
slow down, then shift to a lower
gear so that engine braking will
help you maintain a safe speed. Don't "ride" the brake pedal.
Resting your foot on the brake
pedal while driving can be danger-
ous because the brakes might
overheat and lose their effective-
ness. It also increases the wear of
the brake components.
If a tire goes flat while you are driv- ing, apply the brakes gently and
keep the vehicle pointed straight
ahead while you slow down. When
you are moving slowly enough for it
to be safe to do so, pull off the road
and stop in a safe place.
If your vehicle is equipped with an Automatic Transaxle, don't let your
vehicle creep forward. To avoid
creeping forward, keep your foot
firmly on the brake pedal when the
vehicle is stopped.
Be cautious when parking on a hill. Firmly engage the parking brake
and place the shift lever in P (auto-
matic transaxle). If your vehicle is
facing downhill, turn the front
wheels into the curb to help keep
the vehicle from rolling.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.

Driving your vehicle
42
6
If your vehicle is facing uphill, turn
the front wheels away from the
curb to help keep the vehicle from
rolling. If there is no curb or if it is
required by other conditions to
keep the vehicle from rolling, block
the wheels.
Under some conditions your park- ing brake can freeze in the
engaged position. This is most like-
ly to happen when there is an
accumulation of snow or ice
around or near the rear brakes or if
the brakes are wet. If there is a risk
that the parking brake may freeze,
apply it only temporarily while you
put the shift lever in P (automatic
transaxle) and block the rear
wheels so the vehicle cannot roll.
Then release the parking brake.
Do not hold the vehicle on an incline with the accelerator pedal.
This can cause the transaxle to
overheat. Always use the brake
pedal or parking brake.

645
Driving your vehicle
Prerequisite for activation
The FCA will activate when the FCA
is selected on the LCD display, and
when the following prerequisites are
satisfied:
- The ESC (Electronic StabilityControl) is activated.
- The driving speed is over 6 mph (10 km/h). (The FCA only works
within a certain range of vehicle
speeds)
- When the FCA recognizes a vehi- cle or the pedestrian in front. (The
FCA may not recognize every
obstacle or provide warnings and
braking in every situation, so do
not rely on the FCA to stop the
vehicle in instances where the driv-
er sees an obstacle and has the
ability to apply the brakes)
FCA warning message and
system control
The FCA system produces warning
messages, warning alarms, and
emergency braking based on the level
of risk of a frontal collision, such as
when a vehicle ahead suddenly
brakes, or when the system detects
that a collision with a pedestrian is
imminent.
The driver can select the initial warn-
ing activation time in the User
Settings in the LCD display. The
options for the initial Forward
Collision Warning include Early,
Normal or Late initial warning time.
WARNING
The FCA automatically acti-vates upon placing the igni-
tion switch to the ON position.
The driver can deactivate the
FCA by canceling the system
setting on the LCD display.
The FCA automatically deacti- vates upon canceling the
ESC. When the ESC is can-
celed, the FCA cannot be acti-
vated on the LCD display.
The FCA warning light will
illuminate.
Set or cancel FCA after stop- ping the vehicle in the safe
place for your safety.

Driving your vehicle
46
6
Collision Warning (1st warning)
The warning message appears on
the LCD display with the warning
alarms.
The FCA system limitedly controls the brakes to preemptively mitigate
impact in a collision.
Emergency braking (2nd warning)
The warning message appears onthe LCD display with the warning
alarms.
The FCA system limitedly controls the brakes to preemptively mitigate
impact in a collision.
The brake control is maximized
just before a collision.
Brake operation
In an urgent situation, the brakingsystem enters into the ready status
for prompt reaction to assist the
driver in depressing the brake
pedal.
The FCA system provides addi- tional braking power for potentially
improved braking performance
when the driver depresses the
brake pedal.
The braking control is automatical- ly deactivated when the driver
sharply depresses the accelerator
pedal, or when the driver abruptly
operates the steering wheel.
The braking control is automatical- ly canceled when risk factors dis-
appear.
The driver should always pay great
caution to vehicle operation, even
though there is no warning message
or warning alarm.
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649
Driving your vehicle
System malfunction
When the FCA is not working prop-erly, the FCA warning light ( ) will
illuminate and the warning mes-
sage will appear for a few seconds.
After the message disappears, the
master warning light ( ) will illu-
minate. In this case, have the vehi-
cle inspected by an authorized Kia
dealer. The FCA system will get deactivat-
ed for the sake of driver's safety
when the ESC warning light comes
on. The FCA warning message will
appear at the same time, too. But
that doesn't necessarily mean the
malfunction of the FCA system.\
Both FCA warning light and warn-
ing message will disappear once
the ESC warning light issue is
resolved.
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WARNING
The FCA is only a supplemen-tal system for the driver’s con-
venience. The driver should
hold the responsibility to con-
trol the vehicle operation. Do
not solely depend on the FCA
system. Rather, maintain a safe
braking distance, and, if neces-
sary, depress the brake pedal
to lower the driving speed.
In certain instances and under certain driving condi-
tions, the FCA system may
activate unintentionally. This
initial warning message
appears on the LCD display
with a warning chime.
Also, in certain instances the
front radar sensor or camera
recognition system may not
detect the vehicle, pedestrian
ahead. The FCA system may
not activate and the warning
message will not be dis-
played.
(Continued)