KIA OPTIMA HYBRID 2018 Service Manual

H35
The Hybrid battery uses high voltage
top operate the electric motor and
other components and other compo-
nents. High voltage is dangerous if
touched.
Your vehicle is equipped with orange
colored insulation and covers over
the high voltage components to pro-
tect people from electric shock. High
voltage warning labels are attached
to some system components as
additional warnings. Your vehicle is
recommended to be serviced by an
authorized Kia dealer.
WARNING - High voltage
components
Never touch orange or high volt-
age labeled components includ-
ing wires, cables, and connec-
tions. If the insulators or covers
are damaged or removed, severe
injury or death from electrocu-
tion may occur.
WARNING- Touching HPCU
When replacing the fuses in the
engine compartment, never
touch the HPCU. The HPCU car-
ries high voltage. Touching the
HPCU could result in electrocu-
tion, serious injury, or death.
OJFHQ015002
OJFHQ015003
HPCU
HEV Battery

H36
✽
✽NOTICE - Prolonged parking
Prolonged parking might cause bat-
tery discharge and operation failure
due to natural discharge. Driving
the vehicle approximately once
every 2 months, more than 9 mile
(15 km) is recommended. The bat-
tery will be charged automatically
when driving the vehicle.
CAUTION- High Voltage
Battery Damage
When loading your vehicle, be careful of transporting items in amanner that could damage thehigh voltage battery. Do notstore items on top of the highvoltage battery or overload thetrunk area. Such actions mayultimately damage the high volt-age battery unit.
CAUTION- Carrying
Liquids in Trunk
Do not load large amounts of liq- uid in open containers in the vehi-cle. If spilled onto the HEV bat-tery, the liquid may cause a shortor further damage to the battery.
COMPONENTS OF THE HYBRID/PLUG-IN HYBRID VEHICLE(CONT.)
WARNING- Battery
Electrolyte
As with all batteries, avoid fluid
contact with the Hybrid battery.
If the battery is damaged and if
electrolyte comes in contact
with your body, clothes or eyes,
immediately flush with a large
quantity of fresh water.
OYFH021002N
Motor
WARNING- After-market
Battery Charger
Do not use an after-market bat-
tery charger to charge the
Hybrid battery. Doing so may
result in death or serious injury.

H37
WARNING - High Waters
Avoid high waters as this may result in your vehicle becom-
ing saturated with water and
could compromise the high
voltage components.
Do not touch the any of the high voltage components
within your vehicle if your
vehicle has been submerged
in water equal to half of the
vehicle height. Touching high
voltage components once
submerged in water could
result in severe burns or elec-
tric shock that could result in
death or serious injury.WARNING
-
Exposure to High Voltage
High voltage in the hybrid bat- tery system is very dangerous
and can cause severe burns
and electric shock. This may
result in serious injury or death.
For your safety, never touch, replace, dismantle or remove
any portion of the hybrid bat-
tery system including compo-
nents, cables and connectors.
CAUTION - Cleaning
Engine
When you clean the engine com-partment, do not wash usingwater. Water may cause electricarcing to occur and damage elec-tronic parts and components.
WARNING - Use of Water
or Liquids
If water or liquids come into
contact with the hybrid system
components, and you are also
in contact with the water, severe
injury or death due to electrocu-
tion may occur.
WARNING
-
Hot Components
When the hybrid battery system
operates, the HEV battery sys-
tem can be hot. Heat burns may
result from touching even insu-
lated components of the HEV
system.

H38
COMPONENTS OF THE HYBRID/PLUG-IN HYBRID VEHICLE(CONT.)
Safety plugSome Special Features of the
Hybrid Vehicle.
Hybrid vehicles sound different than
gasoline engine vehicles. When the
hybrid system operates, you may
hear a sound from the hybrid battery
system behind the rear seat. If you
apply the accelerator pedal rapidly,
you may hear a sound. When you
apply the brake pedal, you may hear
a sound from the regenerative brake
system. When the hybrid system is
turned off or on, you may hear a
sound in the engine compartment. If
you depress the brake pedal repeat-
edly when the hybrid system is
turned on, you may hear a sound in
the engine compartment. None of
these sounds indicate a problem.
They are characteristics of hybrid
vehicles.
When the hybrid system is turned on,
the engine may run. This does not
indicate a malfunction. If the " "
symbol is on, the hybrid system is
operating. Even if the gasoline engine
is off, you can operate the vehicle.The HEV system may emit electromag-
netic waves which can affect the per-
formance of electronic devices appli-
ances, such as laptop computers,
which are not part of the vehicle design.
If you park the vehicle for a long time,
the hybrid system will discharge. You
need to drive the vehicle several times
per month to maintain a charge.
When you start the hybrid system in
the "P" transmission position, the
" " symbol is illuminated in the
cluster. The driver can drive the vehi-
cle even if the engine is stopped.
OJFHQ015004
WARNING- Safety Plug
Never touch the safety plug.
Safety plug is attached to high
voltage hybrid battery system.
Touching safety plug will result
in death or serious injury.
Service personnel should follow
procedure in service manual.
WARNING- Turning off HEV system
When you leave the vehicle, you
should turn off the hybrid sys-
tem. If you depress the accelera-
tor pedal by mistake and the vehi-
cle is not in the "P" position, the
vehicle will accelerate. This may
result in serious injury or death.

H39
Virtual Engine Sound System
(VESS)
The Virtual Engine Sound System
generates an engine sound for
pedestrians to hear vehicle while at
low speeds in EV mode.
High Voltage Battery Air Intake
Hybrid battery air intake
The hybrid battery air intake is locat-
ed on bottom the rear seats. The air
intake cools down the hybrid battery.
When the hybrid battery air intake is
blocked, the hybrid battery may be
overheated. Do not obstruct the air
intake with any other objects.
Plug-in Hybrid Vehicle
The high-voltage battery air intake is
located on the left side of the rear
seats. The air intake cools down the
high-voltage battery.
When the high-voltage battery air
intake is blocked, the high-voltage
battery may be overheated and the
vehicle performance may become
limited and set a hybrid warning
lamp. Do not obstruct the air intake
with any other objects.OJFHQ015005
OJFHP036114L
WARNING- Interference
with electronic medical
devices
Electromagnetic waves that are
generated from the charger can
impact medical electric devices
such as an implantable cardiac
pacemaker. When using such
medical electric devices, ask
your medical professional and
the device manufacturer
whether charging your electric
vehicle will impact the operation
of the medical electric devices.

H40
COMPONENTS OF THE HYBRID/PLUG-IN HYBRID VEHICLE(CONT.)
If An Accident Occurs
Avoid the engine compartment.
Avoid any orange or high voltagewires, cables, or components.
Assume that a high voltage com- ponent is exposed and move away
from the vehicle as promptly as
possible.
Refer to Chapter 7 for towing infor- mation.
✽ ✽ NOTICE
• If a small scale fire occurs, use a
fire extinguisher (ABC, BC) that is
meant for electrical fires.
If it is impossible to extinguish the
fire in the early stage, remain a
safe distance from the vehicle and
immediately call 911. Also, advise
them that a hybrid vehicle is
involved.
If the fire spreads to the high volt-
age battery, large amount of water
is needed to put out the fire.
Using small amount of water or
fire extinguishers not meant for
electrical fires could cause serious
injury or death from electrical
shocks.
• If you need towing, refer to chap- ter 7.WARNING - Air Intake
Blocking the air intake behind the rear seats may damage
the HEV battery.
Do not allow any water into the air intake even when
cleaning. If any water enters
the air intake, the Hybrid bat-
tery may cause an electric
shock which can cause seri-
ous injury or death due to
electrocution.

H41
If a vehicle accident occurs:
1.Stop the vehicle and shift the trans-mission into "P" position.
And then depress the parking
brake.
2.Turn off the Hybrid system by pushing the Engine Start/Stop
Button.
3.Evacuate to the safety place.
4.Call emergency services for help and let them know the vehicle is a
Hybrid vehicle. If an immersion in water occurs:
If your vehicle was flooded and has
soaked carpeting or water on the
flooring, you should not try to start
the Hybrid system. Have the car
towed to an authorized Kia dealer.When the hybrid vehicle shuts
off
When the high voltage battery or 12-
volt battery discharges, or fuel tank is
empty, the hybrid system may not
operate.
If the Hybrid system stops operating
while the vehicle is moving, reduce
the vehicle speed gradually. Pull
your vehicle off the road in a safe
area, and shift the transmission in to
Park (P) position and;
1. Turn on the hazard warning flashers.
2. Set the start button at OFF, and try
to start the Hybrid system by
applying the brake pedal and
pushing the start button.
3. If the Hybrid system will not oper- ate, refer to "EMERGENCY
STARTING" in chapter 7.
Before you try to jump start the vehi-
cle, confirm the fuel level. If the fuel
level is low add more fuel before
attempting as emergency start.
WARNING
If a submersion in water occurs:
If your vehicle was flooded and
has soaked carpeting or water
on the flooring, you should not
try to start the Hybrid system.
Never touch the high voltage
cables, connectors and pack-
age modules, because an elec-
trical shock may occur causing
injury or death. High Voltage
cables are orange in color.
We recommend that the car
towed to an authorized Kia dealer.

H42
COMPONENTS OF THE HYBRID/PLUG-IN HYBRID VEHICLE(CONT.)
WARNING - Accident
Vehicle
Never touch electric wires or
cable. If exposed electric wires
or cables are visible inside or
outside of your vehicle, an elec-
tric shock may occur.
WARNING - Putting out
fire
Never use a small quantity of
water to put out a fire in your
vehicle. If a fire occurs, evacu-
ate the car immediately and
contact the fire department.

Introduction
Fuel requirements . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
• Gasoline containing alcohol and methanol . . . . . . . . . 1-2
• Do not use methanol . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
• Fuel additives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
• Operation in foreign countries . . . . . . . . . . . . . . . . . . . 1-4
Vehicle break-in process . . . . . . . . . . . . . . . . . . . . . 1-5
HEV/PHEV powertrain . . . . . . . . . . . . . . . . . . . . . . 1-5
Vehicle data collection and event data recorders. . 1-6
1

Introduction
21
Your new vehicle is designed to use
only unleaded fuel having a pump
octane number ((R+M)/2) of 87
(Research Octane Number 91) or
higher. (Do not use methanol blend-
ed fuels.)
Your new vehicle is designed to
obtain maximum performance with
UNLEADED FUEL, as well as mini-
mize exhaust emissions and spark
plug fouling.
Never add any fuel system cleaning
agents to the fuel tank other than
what has been specified. (Consult an
authorized Kia dealer for details.)
• Tighten the cap until it clicks onetime, otherwise the Check Engine light will illuminate.
Gasoline containing alcohol and
methanol
Gasohol, a mixture of gasoline and
ethanol (also known as grain alco-
hol), and gasoline or gasohol con-
taining methanol (also known as
wood alcohol) are being marketed
along with or instead of leaded or
unleaded gasoline. Pursuant to EPA regulations, ethanol
may be used in your vehicle.
Do not use gasohol containing more
than 15% ethanol, and do not use
gasoline or gasohol containing any
methanol. Ethanol provides less
energy than gasoline and it attracts
water, and it is thus likely to reduce
your fuel efficiency and could lower
your MPG results.
Methanol may cause drivability prob-
lems and damage to the fuel system,
engine control system and emission
control system.
Discontinue using gasohol of any
kind if drivability problems occur.
Vehicle damage or drivability prob-
lems may not be covered by the
manufacturer’s warranty if they result
from the use of:
1. Gasoline or gasohol containing
methanol.
2. Leaded fuel or leaded gasohol.
3. Gasohol containing more than 15% ethanol.
WARNING - Refueling
• Do not "top off" after the noz- zle automatically shuts off.
Attempts to force more fuel
into the tank can cause fuel
overflow onto you and the
ground causing a risk of fire.
Always check that the fuel cap is installed securely to pre-
vent fuel spillage, especially
in the event of an accident.
FUEL REQUIREMENTS