warning light KIA OPTIMA PHEV 2018 Repair Manual

Driving your vehicle
18
6
Power brakes
Your vehicle has power-assisted
brakes that adjust automatically
through normal usage.
If the hybrid system is not on or is
turned off while driving, the power
assist for the brakes will not work.
You can still stop your vehicle by
applying greater force to the brake
pedal than typical. The stopping dis-
tance, however, will be longer than
with power brakes.
When the hybrid system is not on,
the reserve brake power is partially
depleted each time the brake pedal
is applied. Do not pump the brake
pedal when the power assist has
been interrupted.
Pump the brake pedal only when
necessary to maintain steering con-
trol on slippery surfaces. Wet brakes may impair the vehicle’s
ability to safely slow down; the vehi-
cle may also pull to one side when
the brakes are applied. Applying the
brakes lightly will indicate whether
they have been affected in this way.
Always test your brakes in this fash-
ion after driving through deep water.
To dry the brakes, apply them lightly
while maintaining a safe forward
speed until brake performance
returns to normal.
✽ ✽
NOTICE
Do not depress the brake pedal con-
tinuously without the " " indica-
tor ON. The battery may be dis-
charged.
BRAKE SYSTEM
WARNING- Steep hill
braking
Avoid continuous application of
the brakes when descending a
long or steep hill by shifting to a
lower gear. Continuous brake
application will cause the
brakes to overheat and could
result in a temporary loss of
braking performance.
WARNING- HEV driving down hill
Do not turn off the Hybrid sys-
tem while going down a hill. The
brake booster may not work
sufficiently and the braking dis-
tance may be longer.
CAUTION- Brake Pedal
Do not drive with your foot rest- ing on the brake pedal. This willcreate abnormally high braketemperatures which can causeexcessive brake lining and padwear.

619
Driving your vehicle
In the event of brake failure
If service brakes fail to operate while
the vehicle is in motion, you can
make an emergency stop with the
parking brake. The stopping dis-
tance, however, will be much greater
than normal.
Disc brakes wear indicator
When your brake pads are worn and
new pads are required, you will hear
a high-pitched warning sound from
your front brakes or rear brakes. You
may hear this sound come and go or
it may occur whenever you depress
the brake pedal.
Please remember that some driving
conditions or climates may cause a
brake squeal when you first apply (or
lightly apply) the brakes. This is nor-
mal and does not indicate a problem
with your brakes.
Always replace the front or rear
brake pads as pairs.
WARNING- Parkingbrake
Avoid applying the parking
brake to stop the vehicle while it
is moving except in an emer-
gency situation. Applying the
parking brake while the vehicle
is moving at normal speeds can
cause a sudden loss of control
of the vehicle. If you must use
the parking brake to stop the
vehicle, use great caution in
applying the brake.
WARNING- Brake wear
Do not ignore high pitched wear
sounds from your brakes. If you
ignore this audible warning, you
will eventually lose braking per-
formance, which could lead to a
serious accident.
CAUTION- Replace brake pads
Do not continue to drive withworn brake pads. Continuing todrive with worn brake pads candamage the braking system andresult in costly brake repairs.

621
Driving your vehicle
Check the brake warning light by
pressing engine start/stop button ON
(do not start the hybrid system). This
light will be illuminated when the park-
ing brake is applied with the engine
start/stop button in the START or ON
position.
Before driving, be sure the parking
brake is fully released and the brake
warning light is off.
If the brake warning light remains on
after the parking brake is released
while the hybrid system is on, there
may be a malfunction in the brake sys-
tem. Immediate attention is necessary.If at all possible, cease driving the
vehicle immediately. If that is not pos-
sible, use extreme caution while
operating the vehicle and only contin-
ue to drive the vehicle until you can
reach a safe location or repair shop.
Electronic parking brake (EPB)
(if equipped)
Applying the parking brake
To apply the EPB (electronic parking
brake):
1. Depress the brake pedal.
2. Pull up the EPB switch.
Make sure the warning light comes on.
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OJFHP056018N

Driving your vehicle
22
6
Also, the EPB is applied automatical-
ly if the Auto Hold button is on when
the engine is turned off.
✽ ✽
NOTICE
On a steep incline or when pulling a
trailer, if the vehicle does not remain
at a standstill, do as follows:
1. Apply the EPB.
2. Pull up the EPB switch for more
than 3 seconds.
Do not operate the parking brake/
EPB while the vehicle is moving
except in an emergency situation.
✽ ✽NOTICE
A click or electric brake motor
whine sound may be heard while
operating or releasing the EPB, but
these conditions are normal and
indicate that the EPB is functioning
properly.
Releasing the parking brake
To release the EPB (electronic parking
brake), press the EPB switch while
doing the following:
Have the engine start/stop button
in the ON position.
Depress the brake pedal.
The shift lever must be in P (Park).
Make sure the brake warning light
goes off.
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623
Driving your vehicle
To release EPB (electronic parking
brake) automatically:
Shift lever in P (Park)With the engine running depress
the brake pedal and shift out of P
(Park) to R (Reverse) or D (Drive).
Shift lever in N (Neutral) With the engine running depress
the brake pedal and shift out of N
(Neutral) to R (Reverse) or D
(Drive).
Automatic Transaxle 1. Start the engine.
2. Fasten the driver's seat belt.
3. Close the driver's door, engine hood and trunk.
4. Depress the accelerator pedal while the shift lever is in R (Rear),
D (Drive) or Sports mode.
Make sure the brake warning light
goes off.✽ ✽ NOTICE
• For your safety, you can engage
the EPB even though the engine
stop/start button is in the OFF
position, but you cannot release it.
• For your safety, depress the brake pedal and release the parking
brake manually with the EPB
switch when you drive downhill or
when backing up the vehicle.
Do not follow the above procedure
when driving on a flat level ground.
The vehicle may suddenly move for-
ward.
✽ ✽ NOTICE
If the parking brake warning light is
still on even though the EPB has
been released, have the system
checked by an authorized Kia dealer.
EPB (electronic parking brake) may
be automatically applied when:
The EPB is overheated
Requested by other systems
The hybrid system is turned off
with the EPB applied
✽ ✽ NOTICE
If the driver turns the hybrid system
off while Auto Hold is operating,
EPB will be automatically applied.
CAUTION
Do not drive your vehicle with
the EPB applied. It may causeexcessive brake pad and brakerotor wear.

Driving your vehicle
26
6
EPB malfunction indicator
(if equipped)
This warning light illuminates if the
engine start/stop button is changed
to the ON position and goes off in
approximately 3 seconds if the sys-
tem is operation normally.
If the EPB malfunction indicator
remains on, comes on while driving,
or does not come on when the igni-
tion switch or the engine start/stop
button is changed to the ON position,
this indicates that the EPB may have
malfunctioned. If this occurs, have your vehicle
checked by an authorized Kia dealer
as soon as possible.
The EPB malfunction indicator may
illuminate when the ESC indicator
comes on to indicate that the ESC is
not working properly, but it does not
indicate a malfunction of the EPB.
The EPB warning light may illumi-
nate if the EPB switch operates
abnormally. Shut the engine off
and turn it on again after a few min-
utes. The warning light will go off
and the EPB switch will operate
normally. However, if the EPB
warning light is still on, have the
system checked by an authorized
Kia dealer.
If the parking brake warning light does not illuminate or blinks even
though the EPB switch was pulled
up, the EPB is not applied.
If the parking brake warning light blinks when the EPB warning light
is on, press the switch, then pull it
up. Once more press it back to its
original position and pull it back up.
If the EPB warning does not go off,
have the system checked by an
authorized Kia dealer.
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627
Driving your vehicle
Emergency braking
If there is a problem with the brake
pedal while driving, emergency brak-
ing is possible by pulling up and
holding the EPB switch. Braking is
possible only while you are holding
the EPB switch.
✽ ✽NOTICE
During emergency braking by the
EPB, the parking brake warning
light will illuminate to indicate that
the system is operating.
If you notice a continuous noise or
burning smell when the EPB is used
for emergency braking, have your
vehicle checked by an authorized Kia
dealer.
When the EPB (electronic parking
brake) is not released
If the EPB does not release normal-
ly, take your vehicle to an authorized
Kia dealer by loading the vehicle on
a flatbed tow truck and have the sys-
tem checked.
WARNING
Do not operate the electronic
parking brake while the vehicle is
moving except in an emergency
situation. Applying the electronic
parking brake while the vehicle is
moving at normal speeds can
cause a sudden loss of control of
the vehicle. If you must use the
electronic parking brake to stop
the vehicle, use great caution in
applying the brake.

Driving your vehicle
30
6
(Continued)
In these cases, the brake warning
light comes on, the AUTO HOLD
indicator changes from green to
white, and a warning sounds and a
message will appear to inform you
that EPB has been automatically
engaged. Before driving off again,
press foot brake pedal, check the
surrounding area near your vehi-
cle and release parking brake
manually with the EPB switch.
• If the AUTO HOLD indicator lights up yellow, the Auto Hold is
not working properly. Take your
vehicle to an authorized Kia deal-
er and have the system checked.If there is a malfunction with the dri-
ver’s door, engine hood open detec-
tion system, the Auto Hold may not
work properly.
Take your vehicle to an authorized Kia
dealer and have the system checked.
✽ ✽ NOTICE
A click or electric brake motor
whine sound may be heard while
operating or releasing the EPB, but
these conditions are normal and
indicate that the EPB is functioning
properly.
Warning messages
Parking brake automatically locked
When the EPB is applied from Auto
Hold, a warning will sound and a
message will appear.
WARNING
To reduce the risk of an acci-
dent, do not activate Auto Hold
while driving downhill, backing
up or parking your vehicle.
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OJF055123L
■Type A
■Type B

633
Driving your vehicle
Even with the anti-lock brake sys-tem, your vehicle still requires suf-
ficient stopping distance. Always
maintain a safe distance from the
vehicle in front of you.
Always slow down when cornering. The anti-lock brake system cannot
prevent accidents resulting from
excessive speeds.
On loose or uneven road surfaces, operation of the anti-lock brake
system may result in a longer stop-
ping distance than for vehicles
equipped with a conventional
brake system. The ABS warning light will stay on for
approximately 3 seconds after the
engine start/stop button is ON.
During that time, the ABS will go
through self-diagnosis and the light
will go off if everything is normal. If
the light stays on, you may have a
problem with your ABS. Contact an
authorized Kia dealer as soon as
possible. When you drive on a road having
poor traction, such as an icy road,
and have operated your brakes
continuously, the ABS will be active
continuously and the ABS warning
light may illuminate. Pull your vehi-
cle over to a safe place and stop
the engine.
Restart the engine. If the ABS warning light goes off, then your
ABS system is normal. Otherwise,
you may have a problem with the
ABS. Contact an authorized Kia
dealer as soon as possible.
✽ ✽ NOTICE
When you jump start your vehicle
because of a drained battery, the
engine may not run as smoothly and
the ABS warning light may turn on at
the same time. This happens because
of low battery voltage. It does not
mean your ABS has malfunctioned.
• Do not pump your brakes!
• Have the battery recharged before
driving the vehicle.
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Driving your vehicle
36
6
ESC off state 1
To cancel ESC operation, press the
ESC OFF button (ESC OFF )
shortly (ESC OFF indicator light
(ESC OFF ) illuminates). At this
state, the engine control function
does not operate. It means the trac-
tion control function does not oper-
ate. Brake control function only oper-
ates.
To cancel ESC operation, press the
ESC OFF button (ESC OFF ) for
more than 3 seconds. ESC OFF indi-
cator light (ESC OFF ) illuminates
and ESC OFF warning chime will
sound. At this state, the engine con-
trol function and brake control func-
tion do not operate. It means 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.
OJF055253L
OJF055254L
■
Type A
■Type BOJF055255L
OJF055232L
■Type A
■Type B
■ ESC indicator light
■ ESC OFF indicator light