KIA OPTIMA HYBRID 2020 Service Manual

H34
Regeneration
Hybrid battery is being charged by
regenerative braking.
(Wheel \bBattery)
Engine Brake
The vehicle is slowed down by
engine compression.
(Wheel \bEngine)
Power Reserve
Engine is both driving the vehicle
and charging the hybrid battery.
(Engine \b Wheel & Battery)
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ENERGY FLOW HYBRID/PLUG-IN HYBRID VEHICLE (CONT.)

H35
Engine Generation/Motor Drive
The vehicle is being slowed by engine
compression and regenerative brak-
ing. The hybrid battery is being
charged by regenerative braking.
(Engine \bBattery \bWheel)
Engine Generation/Regeneration
The engine and regenerative brake
system charge up the high-voltage
battery.
(Engine & Wheel \b Battery)
Engine Brake/Regeneration
The engine compression can be
used to slow down the vehicle. The
regenerative braking system can be
used to charge the hybrid system.
(Wheel \bEngine & Battery)
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H36
AUX. BATTERY SAVER+ (For
Plug-in Hybrid, if equipped)
The Aux. Battery Saver+ is a function
that monitors the charging status of
the 12V auxiliary battery.
If the auxiliary battery level is low, the
main high voltage battery charges
the auxiliary battery.
✽ ✽NOTICE
The Aux. Battery Saver+ function will
be ON when the vehicle is delivered. If
the function is not needed, you may
turn it off in the Users Settings mode
on the LCD display. For more infor-
mation, refer to the "System setting"
on the following page.
Mode

When the vehicle is OFF with all
doors, hood and liftgate closed, the
Aux. Battery Saver+ periodically acti-
vates according to the auxiliary bat-
tery status.

When the engine start/stop button is
in the ON position with the charging
connector plugged in, this function
activates according to the auxiliary
battery status to prevent over-dis-
charge of the auxiliary battery.
✽ ✽NOTICE
The Aux. Battery Saver+ activates
for a maximum of 20 minutes. If the
Aux. Battery Saver+ function acti-
vates more than 10 times consecu-
tively, in the Automatic Mode, this
function will stop activating, judg-
ing that there is a problem with the
auxiliary battery. In this case, drive
the vehicle for some period of time.
The function will start activating if
the auxiliary battery returns to nor-
mal.
✽ ✽NOTICE
If the Aux. Battery Saver+ function
was activated, a message will be dis-
played on the instrument cluster
and the high voltage battery level
may have decreased.
ENERGY FLOW HYBRID/PLUG-IN HYBRID VEHICLE (CONT.)
CAUTION
The Aux. Battery Saver+ func-
tion cannot prevent battery dis-charge if the auxiliary battery isdamaged, worn out, used as apower supply or unauthorizedelectronic devices are used.

H37
System setting
The driver can activate the Aux.
Battery Saver+ function by placing
the engine start/stop button to the
ON position and by selecting:
"User Settings \bOther \b Aux.
Battery Saver+"
LCD message
This message is displayed when the
Aux. Battery Saver+ function has
been completed when the vehicle is
turned ON.
However, if the LCD message pops
up frequently, have your vehicle`s
auxiliary battery or electric/electronic
components serviced by an author-
ized Kia dealer.
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WARNING
The Aux. Battery Saver+ relies
on the high voltage battery to
charge the 12V battery. The
charging indicator lamp will blink
rapidly when this is occurring.
To reduce the risk of electrical
shock, do not touch any high
voltage components (orange) or
other electrical devices while
charging is occurring.
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H38
Starting the Hybrid System
1. Carry the smart key into the vehi-cle.
2. Make sure the parking brake is firmly applied.
3. Place the shift lever in the P(Park) position. In N (neutral) position,
you cannot start the vehicle.
4. Depress the brake pedal.
5. Press the engine start/stop button.
6. The engine should be started with- out pressing the accelerator. In
extremely cold weather or after the
vehicle has not been operated for
several days, let the engine warm
up without depressing the accelera-
tor.
vehicle, if it is far away from you,
the engine may not start.
ton is in the ACC or ON position
and if any door is open, the sys-
tem checks for the smart key. If
the smart key is not in the vehicle,
the warning, “Key is not in vehi-
cle” will come on, and if all doors
are closed, the chime will also
sound for about 5 seconds. Keep
the smart key in the vehicle when
using the ACC position or if the
vehicle engine is on. The indica-
tor will turn off while the vehicle is
moving. If the starting procedure is fol-
lowed, the “ ” symbol on the
instrument cluster will turn on.
For more details, Please check
chapter 5.
STARTING THE HYBRID/PLUG-IN HYBRID VEHICLE (SMART KEY)

H39
ECONOMICAL and SAFE
OPERATION of Hybrid system
Drive smoothly. Accelerate at amoderate rate and maintain a
steady cruising speed. Don't make
“jack-rabbit” starts. Don't race
between stoplights.
Avoid heavy traffic whenever pos-
sible. Always maintain a safe dis-
tance from other vehicles so you
can avoid unnecessary braking.
This also reduces brake wear.
The regenerative brake generates energy when the vehicle deceler-
ates.
When the hybrid battery power is low, the hybrid system automatical-
ly recharges the hybrid battery.
When the engine runs in “N” posi- tion, the hybrid system cannot gen-
erate electricity. The hybrid battery
cannot recharge in “N” position.
Please refer to chapter 5.
✽ ✽ NOTICE
When the hybrid system is in
READY mode, the engine will auto-
matically start and stop as needed.
The “ ” symbol will illuminate in
the cluster when the system is oper-
ational.
CAUTION- Extended
cranking
Do not crank the engine for aprolonged period of time with-out the engine starting. Thiscould result in damage to theHEV battery and become totallydischarged.

H40
COMPONENTS OF THE HYBRID/PLUG-IN HYBRID VEHICLE
1. Engine : 2.0L
2. Motor : 38kW (Hybrid) / 50kW (Plug-in hybrid)
3. Transmission : 6AT
4. Hybrid starter generator (HSG)5. HPCU (Hybrid Power Control Unit)
6. High voltage battery system
7. Regenerative brake system
8. Virtual Engine Sound System (VESS)
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The actual shape may differ from the illustration.
- PHEV - HEV

H41
The Hybrid battery uses high-voltage
to operate the electric motor and
other components. High voltage is
dangerous if touched.
Your vehicle is equipped with orange
colored insulation which covers over
the high voltage components to pro-
tect people from electric shock.
High voltage warning labels are
attached to some system compo-
nents as additional warnings. Your
vehicle is recommended to be serv-
iced by an authorized Kia dealer.
WARNING - High voltage
components
Never touch orange or high-volt-
age labeled components includ-
ing wires, cables, and connec-
tors. 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.
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HPCU
HEV Battery
PHEV Battery

H42
✽ ✽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 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. Have
your eyes examined by a doctor
as soon as possible.
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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.

H43
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 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 electric shock that
could result in death or seri-
ous 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.