2020 HYUNDAI SONATA HYBRID Owners Manual

1-12
Foreword
HEV (HYBRID ELECTRIC VEHICLE) SYSTEM
The HYUNDAI Hybrid Electric Vehicle (HEV) uses both the gasoline engine and the
electric motor for power. The electric motor is run by a high-voltage HEV battery.
Depending on the driving conditions, the HEV computer selectively operates between
the engine and the electric motor or even both at the same time.
Fuel efficiency increases when the engine is at idle, or when the vehicle is driven by the
electric motor with the HEV battery.
The HEV battery charge must be maintained, so at times the engine will come on even
at idle to act as a generator. Charging also occurs when decelerating or by regenerative
braking.
Electric motorElectric motorElectric motor + EngineElectric motor + Engine EngineEngineChargingCharging Engine OFFEngine OFF
Startup/Low speed cruise Acceleration High speed cruiseDecelerationStop
ODN8H069105

01
1-13
Starting the Vehicle
Vehicles with smart key system
1. Carry the smart key or leave it inside
the vehicle.
2. Make sure the parking brake is firmly
applied.
3. Make sure the shift button is in P
(Park). With the shift button in N
(Neutral), you cannot start the vehicle.
4. Depress the brake pedal.
5. Press the Engine Start/Stop button.
If the hybrid system starts, the “”
indicator will come on.
Whether the engine is cold or warm, it
should be started without depressing
the accelerator.
After following the start procedures,
“
” indicator on the instrument
cluster will turn on. For more details,
please check chapter 6.
ECONOMICAL and SAFE OPERATION of
Hybrid system
• Drive smoothly. Accelerate at a
moderate rate and maintain a steady
cruising speed. Do not make “jack-
rabbit” starts. Do not race between
stoplights.
• Avoid heavy traffic whenever possible.
Always maintain a safe distance
from other vehicles so you can
avoid unnecessary braking. This also
reduces brake wear.
• The regenerative brake generates
energy when the vehicle decelerates.
• When the hybrid battery power is
low, the hybrid system automatically
recharges the hybrid battery.
• When the engine is running with the
shift button in N (Neutral), the hybrid
system cannot generate electricity.
The hybrid battery cannot recharge
with the shift button in N (Neutral).
Information
In the hybrid system, the engine
automatically runs and stops. When
the hybrid system operates, the “
”
indicator is illuminated.
In the following situation, the engine may
operate automatically.
- When the engine is ready to run
-When the hybrid battery is being
charged
-Depending on the temperature
condition of the hybrid battery
Special Features
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
an unconventional 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 repeatedly
when the hybrid system is turned on,
you may hear a sound in the engine
compartment. None of these sounds
indicate a problem. These are normal
characteristics of hybrid vehicles.
If any of following occur, it’s a normal
condition if you hear a motor sound in
the engine compartment:
-After turning off the hybrid system,
the brake pedal is released.
-When the hybrid system is turned off,
the brake pedal is applied.
-When the driver door is opened.
DRIVING THE HYBRID VEHICLE

Foreword
1-14
When the hybrid system is turned ON,
the gasoline engine may run or may not.
In this situation, you may feel a vibration.
This does not indicate a malfunction.
When the “
” indicator illuminates, the
hybrid system is ready to begin driving.
Even if the engine is off, you can operate
the vehicle as long as the “
” indicator
is illuminated.
NOTICE
The hybrid system contains many
electronic components. High voltage
components, such as cables and other
parts, may emit electromagnetic waves.
Even when the electromagnetic cover
blocks electromagnetic emissions,
electromagnetic waves may have an
effect on electronic devices. When your
vehicle is not used for a long period of
time, the hybrid system will discharge.
You need to drive the vehicle several
times a month. We recommend driving
at least for 1 hour or 16 km. When the
hybrid battery is discharged, or when it
is impossible to jump start the vehicle,
we recommend that you contact your
authorized HYUNDAI dealer.
WARNING
• When you start the hybrid system
with the shift button in P (Parking),
the “
” indicator illuminates on
the instrument cluster. The driver
can drive the vehicle, even when the
gasoline engine is off.
• When you leave the vehicle, you
should turn OFF the hybrid system
or locate the shift button in P (Park).
When you depress the accelerator
pedal by mistake, or when the shift
button is not in P (Park), the vehicle
will abruptly move, possibly resulting
in serious injury or death.
Virtual Engine Sound System (VESS)
The Virtual Engine Sound System
generates engine sound for pedestrians
to hear vehicle sound because there is
limited sound while motor power is used.
• If the gear shifts from P (Parking) after
start-up, the VESS sound is output.
• When the gear is shifted to R
(Reverse), an additional warning
sound will be heard.
What does regenerative braking do?
It uses an electric motor when
decelerating and when braking. It
transforms kinetic energy to electrical
energy in order to charge the high
voltage battery.
Battery
• The vehicle is composed of a high
voltage battery that drives the motor
and air conditioner, and an integrated
12V lithium ion polymer battery with
the HEV battery that drives the lamps,
wipers, and audio system.
• The integrated 12V battery is
automatically charged when the
vehicle is in the ready (
) mode.

01
1-15
Hybrid System Gauge
Power gauge
„„Type A, B
ODN8H049032
„„Type C
ODN8H040033N
The hybrid system gauge indicates
whether the current driving condition is
fuel efficient or not.
• CHARGE:
Shows that the energy made by the
vehicle is being converted to electrical
energy. (Regenerated energy)
• ECO:
Shows that the vehicle is being driven
in an Eco-friendly manner.
• POWER:
Shows that the vehicle is exceeding
the Eco-friendly range.
According to the hybrid system gauge
area, the “EV” indicator comes on or off.
- “EV” indicator ON : Vehicle is driven
using the electric motor or the
gasoline engine is stopped.
-“EV” indicator OFF : Vehicle is driven
using the gasoline engine.
Hybrid battery SOC (State of Charge)
gauge
„„Type A, B
ODN8H049034
„„Type C
ODN8H040035N
This gauge indicates the remaining
hybrid battery power. If the SOC is
near the “L (Low)” level, the vehicle
automatically operates the engine to
charge the battery.
However, if the Service Indicator (
)
and Malfunction Indicator Lamp (MIL)
(
) turn on when the SOC gauge is near
the “L (Low)” level, we recommend the
vehicle be checked by an authorized
HYUNDAI dealer.

Foreword
1-16
Warning and Indicator Lights
Ready indicator
This indicator illuminates:
When the vehicle is ready to be driven.
-ON : Normal driving is possible.
-OFF : Normal driving is not possible,
or a problem has occurred.
-Blinking : Emergency driving.
When the ready indicator goes OFF
or blinks, there is a problem with the
system. If this occurs, we recommend
that you have your vehicle inspected by
an authorized HYUNDAI dealer.
EV mode indicator
This indicator illuminates:
When the vehicle is driven by the electric
motor.
Service warning light
This warning light illuminates:
• When you set the ignition switch or
the Engine Start/Stop button to the
ON position.
-The service warning light illuminates
for approximately 3 seconds and
then turns off when all checks have
been performed.
• When there is a problem with the
hybrid vehicle control system or
hardware.
When the warning light illuminates
while driving, or does not go OFF after
starting the vehicle, we recommend that
you have the vehicle inspected by an
authorized HYUNDAI dealer.
Regenerative brake warning
light
(yellow)
This warning light illuminates:
When the regenerative brake does not
operate and the brake does not perform
well. This causes the Brake Warning
light (red) and Regenerative Brake
Warning Light (yellow) to illuminate
simultaneously.
If this occurs, drive safely and have
your vehicle inspected by an authorized
HYUNDAI dealer. The operation of the
brake pedal may be more difficult than
normal and the braking distance may
increase.

01
1-17
LCD Display Messages
Ready to start driving
OOSHQ019003L
This message is displayed when the
vehicle is ready to be driven.
Check regenerative brakes
OOSHQ019004L
This message is displayed when
the brake performance is low or the
regenerative brake does not work
properly due to a problem in the brake
system.
If this occurs, it may take longer for the
brake pedal to operate and the braking
distance may become longer.
Stop vehicle and check brakes
OOSHQ019006L
This message is displayed when a
problem occurs in the brake system.
If this occurs, park the vehicle in a
safe location and we recommend that
you tow your vehicle to the nearest
authorized HYUNDAI dealer and have the
vehicle inspected.
Check Hybrid system
OOSHQ019005L
This message is displayed when there is a
problem with the hybrid control system.
Refrain from driving when the warning
message is displayed.
If this occurs, we recommend that
you have the vehicle inspected by an
authorized HYUNDAI dealer.

Foreword
1-18
Stop safely and check Hybrid system
OOSHQ019007L
This message is displayed when there
is a problem with the hybrid control
system. The “
” indicator will blink
and a warning chime will sound until the
problem is solved. Refrain from driving
when the warning message is displayed.
If this occurs, we recommend that
you have the vehicle inspected by an
authorized HYUNDAI dealer.
Check Hybrid system. Do not start
engine
OOSHQ019008L
This message is displayed when the
hybrid battery power (SOC) level is low.
A warning chime will sound until the
problem is solved. Refrain from driving
when the warning message is displayed.
If this occurs, we recommend that
you have the vehicle inspected by an
authorized HYUNDAI dealer.
Stop safely and check power supply
OOSHQ019009L
This message is displayed when a
problem occurs in the power supply
system.
If this occurs, park the vehicle in a safe
location and tow your vehicle to the
nearest authorized HYUNDAI dealer and
have the vehicle inspected.
Check virtual engine sound system
OOSHQ019010L
This message is displayed when there is
a problem with the Virtual Engine Sound
System (VESS).
If this occurs, we recommend that
you have the vehicle inspected by an
authorized HYUNDAI dealer.

01
1-19
Refuel to prevent Hybrid battery
damage
OOSHQ019011L
This message is displayed when the fuel
tank is nearly empty.
You should refill the fuel tank to prevent
hybrid battery damage.
Refill inverter coolant
OOSHQ019012L
This message is displayed when the
inverter coolant is nearly empty.
You should refill the inverter coolant.
Park with engine On to charge
battery
OOSHQ019013L
This message is displayed when the
hybrid battery power (SOC) level is low.
If this occurs, park the vehicle in a safe
location and wait until the hybrid battery
is charged.
Start engine to avoid battery
discharge
OOSHQ019027L
This message is displayed to inform the
driver the 12V battery may be discharged
if the ignition switch is in ON position
(without the
indicator ON).
Set the vehicle to the ready () mode
to prevent the 12V battery from being
discharged.