ECO mode HYUNDAI SONATA HYBRID 2021 Owners Manual

F2
This manual includes information titled as DANGER, WARNING, CAUTION and
NOTICE.
These titles indicate the following:
DANGER
DANGER indicates a hazardous situation which, if not avoided, will result in
death or serious injury.
WARNING
WARNING indicates a hazardous situation which, if not avoided, could result
in death or serious injury.
CAUTION
CAUTION indicates a hazardous situation which, if not avoided, could result
in minor or moderate injury.
NOTICE
NOTICE indicates a situation which, if not avoided, could result in vehicle
damage.
Your HYUNDAI should not be modified in any way. Such modifications may
adversely affect the performance, safety or durability of your HYUNDAI
and may, in addition, violate conditions of the limited warranties covering
the vehicle. Certain modifications may also be in violation of regulations
established by the U.S. Department of Transportation and other federal or state
agencies.
Your vehicle is equipped with electronic fuel injection and other electronic
components. It is possible for an improperly installed/adjusted two-way radio
or cellular telephone to adversely affect electronic systems. For this reason,
we recommend that you carefully follow the radio manufacturer’s instructions
or consult your HYUNDAI dealer for precautionary measures or special
instructions if you choose to install one of these devices.
CAUTION: MODIFICATIONS TO YOUR HYUNDAI
TWO-WAY RADIO OR CELLULAR TELEPHONE INSTALLATION
SAFETY AND VEHICLE DAMAGE WARNING

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.

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.

Safety System
3-16
„„Front
ODN8039019
While the engine is running, push either
of the switches to warm the driver’s seat
or front passenger’s seat.
During mild weather or under conditions
where the operation of the seat warmer
is not needed, keep the switches in the
OFF position.
• Manual temperature control
Each time you push the switch, the
temperature setting of the seat is
changed as follows:
-Front seat
LOW ( ) ← MIDDLE (





) → HIGH (













)
OFF → HIGH (








) → HIGH (













)
UP
UP
DOWN
DOWN
↑
↓ DOWN
UP
• Automatic temperature control
The seat warmer starts to
automatically control the seat
temperature in order to prevent
low-temperature burns after being
manually turned ON.
-Front seat
OFF →
←
↑
↓ 30 MIN
60 MIN
LOW ( )
HIGH ( )
MIDDLE ( )
You may manually press the switch to
increase seat temperature. However, it
soon returns the automatic mode again.
• When pressing the switch for more
than 1.5 seconds with the seat warmer
operating, the seat warmer will turn
OFF.
• The seat warmer defaults to the OFF
position whenever the ignition switch
is in the ON position. However, if the
Auto Comfort Control function is ON,
the driver’s seat warmer will turn on
and off depending on the ambient
temperature.
• Auto Comfort Control (for driver’s
seat, if equipped)
The seat warmer automatically
controls the seat temperature
depending on the ambient
temperature when the engine is
running. If the seat warmer switch
is pushed, the seat warmer will have
to be controlled manually. To use
this function, it must be activated
from the Settings menu in the AVN
system screen. For more information,
refer to the separately supplied Car
Infotainment System manual.

Safety System
3-36
Information
Position the release button so that it is easy
to access in case of an emergency.
OLF034076
3. Pull the shoulder portion of the
seat belt all the way out. When the
shoulder portion of the seat belt
is fully extended, it will shift the
retractor to the “Automatic Locking”
(child restraint) mode.
OLF034075
4. Slowly allow the shoulder portion of
the seat belt to retract and listen for
an audible “clicking” or “ratcheting”
sound. This indicates that the retractor
is in the “Automatic Locking” mode.
If no distinct sound is heard, repeat
steps 3 and 4.
5. Remove as much slack from the belt
as possible by pushing down on the
child restraint system while feeding
the shoulder belt back into the
retractor.
6. Push and pull on the child restraint
system to confirm that the seat belt
is holding it firmly in place. If it is not,
release the seat belt and repeat steps
2 through 6.
7. Double check that the retractor is in
the “Automatic Locking” mode by
attempting to pull more of the seat
belt out of the retractor. If you cannot,
the retractor is in the “Automatic
Locking” mode.
If your CRS (child restraint system)
manufacturer instructs or recommends
you to use a tether anchor with the lap/
shoulder belt, refer to the previous pages
for more information.
Information
When the seat belt is allowed to retract to
its fully stowed position, the retractor will
automatically switch from the “Automatic
Locking” mode to the emergency lock
mode for normal adult usage.
WARNING
If the retractor is not in the “Automatic
Locking” mode, the child restraint
can move when your vehicle turns or
stops suddenly. A child can be seriously
injured or killed if the child restraint
is not properly anchored in the car,
including manually pulling the seat belt
all the way out to shift the rectractor to
the “Automatic Locking” mode.
To remove the child restraint, press the
release button on the buckle and then
pull the lap/shoulder belt out of the
restraint and allow the seat belt to retract
fully.

03
3-39
Where Are the Air Bags?
Driver’s and passenger’s front air
bags
Your vehicle is equipped with an
Advanced Supplemental Restraint
System (SRS) and lap/shoulder belts at
both the driver and passenger seating
positions.
The SRS consists of air bags which are
located in the center of the steering
wheel, in the driver’s side lower crash
pad below the steering wheel column
and the passenger’s side front panel pad
above the glove box.
The air bags are labeled with the letters
“AIR BAG” embossed on the pad covers.
„„Driver’s front air bag
ODN8039034
„„Driver’s knee air bag
ODN8039035
„„Passenger’s front air bag
ODN8039036
The purpose of the SRS is to provide the
vehicle’s driver and front passengers with
additional protection than that offered
by the seat belt system alone. The SRS
uses sensors to gather information about
the driver’s and front passenger’s seat
belt usage and impact severity. The seat
belt buckle sensors determine if the
driver and front passenger’s seat belts
are fastened. These sensors provide the
ability to control the SRS deployment
based on whether or not the seat belts
are fastened, and how severe the impact
is. The advanced SRS offers the ability to
control the air bag inflation within two
levels. A first stage level is provided for
moderate-severity impacts. A second
stage level is provided for more severe
impacts. According to the impact
severity, and seat belt usage, the SRS
Control Module (SRSCM) controls the
air bag inflation. Failure to properly
wear seat belts can increase the risk or
severity of injury in an accident.

Check Hybrid system ........................................................................\
.......................4-23
Stop safely and check Hybrid system ....................................................................4-23
Check Hybrid system. Do not start engine ............................................................4-23
Stop safely and check power supply ......................................................................4-23
Check virtual engine sound system ........................................................................\
4-23
Refuel to prevent Hybrid battery damage
.............................................................4-23
Refill inverter coolant ........................................................................\
......................4-23
Park with engine On to charge battery ..................................................................4-23
Start engine to avoid battery discharge .................................................................4-23
LCD Display (TYPE A, B) ........................................................................\
..........4-24LCD Display Control ........................................................................\
...........................4-24
LCD Display Modes ........................................................................\
............................4-25
Trip computer mode ........................................................................\
........................4-26
Turn By Turn (TBT) mode ........................................................................\
................4-26
Driving Assist mode ........................................................................\
.........................4-26
Master warning mode ........................................................................\
.....................4-27
User settings mode ........................................................................\
..........................4-27
Trip Computer ........................................................................\
..................................... 4-36
Trip modes
........................................................................\
........................................4-36
Average fuel economy/Instant fuel economy .......................................................4-36
Accumulated Info display ........................................................................\
................4-37
Drive Info display
........................................................................\
.............................4-37
Digital speedometer ........................................................................\
........................4-38
Smart shift ........................................................................\
........................................4-38
Engine coolant temperature ........................................................................\
...........4-38
LCD display (type c) ........................................................................\
................4-39LCD Display Control ........................................................................\
...........................4-39
View Modes ........................................................................\
.......................................4-40
Utility View Mode ........................................................................\
...............................4-41
Utility Items ........................................................................\
......................................4-41
Driving Assist view mode ........................................................................\
................4-42
Turn By Turn (TBT) view mode ........................................................................\
........4-42
Parking Assist view mode ........................................................................\
................4-42
Other Information Display ........................................................................\
..............4-43
Option Menu ........................................................................\
......................................4-43
Warning message mode ........................................................................\
................. 4-44
User Settings Mode
........................................................................\
...........................4-44
4

Instrument Cluster
4-8
You can change the temperature unit
from °F to °C or °C to °F in the User
Settings mode in the cluster:
-Go to User Settings Mode → Other → Temperature Unit.
For vehicles equipped with Automatic
Climate Control, you can also:
- Press and hold the AUTO and OFF
buttons on the climate control unit for
3 seconds
Both the temperature unit on the cluster
LCD display and climate control screen
will change.
Odometer
„„Type A, B
OTMA048183
„„Type C
ODN8H040010NThe odometer indicates the total
distance that the vehicle has been
driven and should be used to determine
when periodic maintenance should be
performed.
Range
„„Type A, B
OAD048563L
„„Type C
ODN8A049033
• The range is the estimated distance
the vehicle can be driven with the
remaining fuel.
• If the estimated distance is below
1 mi. (1 km), the trip computer will
display "----" as range.

04
4-9
Information
• If the vehicle is not on level ground or
the battery power has been interrupted,
the range function may not operate
correctly.
• The range may differ from the actual
driving distance as it is only an estimate
of the available driving range for the
vehicle and driving conditions.
• The trip computer may not register
additional fuel if less than 1.6 gallon (6
liters) of fuel are added to the vehicle.
• The range may vary significantly based
on driving conditions, driving habits,
and condition of the vehicle.
Transmission Shift Indicator
(if equipped)
Automatic transmission shift
indicator
„„Type A, B
OIG046112
„„Type C
ODN8A049009
This indicator displays which shift button
position is selected.
„„Type A, B
OIK047141
„„Type C
ODN8A049029
Shift Indicator Pop-up
The pop-up that indicates the current
gear position is displayed in the cluster
for about 2 seconds when shifting into
other positions (P/R/N/D).
The shift indicator pop-up function can
be activated or deactivated from the
User Settings mode in the cluster LCD
display.