2021 HYUNDAI SONATA HYBRID remote control

05
5-9
Start-up
You can start the vehicle without
inserting the key.
For information, refer to the “Engine
Start/Stop Button” section in chapter 6.
NOTICE
To prevent damaging the smart key:
• Keep the smart key in a cool,
dry place to avoid damage or
malfunction. Exposure to moisture
or high temperature may cause
the internal circuit of the smart key
to malfunction which may not be
covered under warranty.
• Avoid dropping or throwing the
smart key.
• Protect the smart key from extreme
temperatures.
Remote start
You can start the vehicle using the
Remote Start button (5) of the smart key.
To start the vehicle remotely:
• Lock the doors by pressing the door
lock button within 32 feet (10 m)
distance from the vehicle.
• Press the remote start button for over
2 seconds within 4 seconds after
locking the doors and the hazard
warning will blink.
To turn off the remote start function,
press the remote start button once.
In case of the manual operation,
the climate control system will be
maintained even when the engine is
turned OFF. However, the automatic
operation is set to 72°F (22°C).
Mechanical key
If the Smart Key does not operate
normally, you can lock or unlock the
driver’s door by using the mechanical
key.
OFE048007
To remove the mechanical key from the
smart key FOB, slide the release lever in
the direction of the arrow (1) and then
pull the mechanical key (2) outward.
To unlock the vehicle using the
mechanical key. insert the mechanical
key into the key hole in the driver door.
To reinstall the mechanical key into the
FOB, insert the key in the top of the key
FOB and push inward until a click sound
is heard.
Loss of a smart key
A maximum of two Smart Keys can be
registered to a single vehicle. If you
happen to lose your smart key, you
should immediately take the vehicle
and remaining keys to your authorized
HYUNDAI dealer or tow the vehicle, if
necessary.

05
5-17
The solution allows for offline mode usage
when the mobile data connection of the
smartphone is weak. When you are in the
place where the mobile data connection
of your smartphone is available and
place your smartphone on the interior
authentication pad (wireless charger) and
start up your vehicle or contact the digital
key on the door handle to lock or unlock
the door, the remote renewal of security
information starts automatically. Even
though the engine is turned on, please
wait until the remote renewal process
is completed and wireless charger is
converted to charging mode.
CAUTION
The engine can be turned on if the
registered smartphone or card key is
placed on the interior authentication
pad (wireless charger). Do not leave
unsupervised children or people who
are not aware of the system since it
can result in serious injury or death.
Always keep the registered digital
key(smartphone or card key) with you to
prevent vehicle theft when leaving the
vehicle.
For more information, refer to the
Engine Start/Stop button in chapter 6.Remote Control with Digital Key
To use the remote control function with
your android smartphone, Bluetooth
must be turned on.
Remote Control Connection with Digital
Key
1. Open Hyundai digital key application
on the smartphone. Select the
vehicle to activate the remote control
function as a main vehicle.
2. Approach with the activated
smartphone app to your vehicle
and you can check whether the
connection is available. If it enables
your smartphone to connect, connect
with your vehicle by pressing the
connect button. The remote control
function is activated after completing
the process.
Remote Control Operation with Digital
Key
You can execute the remote control
operation including door lock/unlock,
panic on/off, remote start / remote
stop and trunk opening. The icon for
each function will be highlighted and
alarm/vibration also provided when the
operation is performed.
Note that you cannot lock your vehicle
using the Hyundai digital key app if any
of the following occurs:
• The POWER button is in ACC or ON
position.
• Any doors are open.
When the smartphone and the vehicle
are connected by the Bluetooth function
but the remote control command
cannot be received over 5 minutes, the
remote control connection is cancelled
automatically.

Convenient Features
5-18
CAUTION
• If metallic window tint was applied
to your vehicle, it may cause
bad Bluetooth connection or
performance degradation of the
digital key.
• If multiple users operate the remote
control function simultaneously, the
connection between the digital key
and the vehicle might result in failed
commands. Please connect and
operate the remote control function
only the necessary user.
• When using the remote control
operation, the driver (the remote
control user) should leave the vehicle
after confirming the door lock (the
chime sounds once and the hazard
warning lights blink).
• The remote functions of the Digital
Key app enables the vehicle to be
controlled from a set distance. If
the digital key or the vehicle goes
beyond the operable distance, the
remote control function might be
disconnected or cancelled.
• If the digital key (smartphone) is
connected with the vehicle for the
remote control, the driver with the
key goes far away from the vehicle,
the function might not work.
• If the remote control operation
is executed where the mobile
connection is weak, Bluetooth
connection is poor due to several
Bluetooth devices or there is an
object such as metal or concrete, it
might be delayed or the operable
distance might decrease. You should
not cover the smartphone with your
hand or place other devices which
can cause frequency interference. It
may result in poor performance.
• If the remote control function is not
available, please use NFC function to
lock or unlock the doors. Remote Start with Digital Key
•
When the shift button of your vehicle
is in P (Park) and all of the doors
including trunk and hood is locked
and the vehicle is off, press the Door
Lock button in the Hyundai Digital
Key app then press the Remote Start
button within 4 seconds.
You can confirm the engine is on if the
hazard warning lights blinks two times
and the chime sounds.
• If you want to turn off the engine,
press Remote Engine Stop. Air
Conditioner / Heating system
maintains the same status as when
you last used the vehicle.
• Unless you put the registered digital
key(smartphone) on the interior
authentication pad (wireless charger)
when the remote start function is on,
the engine will turn off.
• If you do not get on the vehicle within
10 minutes after the engine turns on,
the vehicle will turn off.
For more information, refer to the Engine
Start/Stop button in chapter 6.
Vehicle information Display
The digital key application displays
the vehicle information such as
driving or door conditions through the
communication with the vehicle.
• How to check : Select the vehicle
what you want to check and touch
the vehicle image, then vehicle
information display page will be
shown.
• Contents : accumulated odometer,
latest fuel economy, driving range,
fuel remaining, tire pressure, doors
lock/unlock status and last data
updated time.
ÃThe information displayed may differ
from the actual vehicle status.
ÃFor more information, please refer to
the ‘Tutorial’ on your Digital key app.

Convenient Features
5-20
• If the remote control operation
is executed where the mobile
connection is weak, Bluetooth
connection is poor due to lots of
Bluetooth devices or there is an
object such as metal or concrete, it
might be delayed or the operable
distance might decrease. Especially,
you should not cover the smartphone
with your hand or place other
devices which can cause frequency
interference. It may result in poor
performance.
• If the remote control function is not
activated, please use NFC function to
lock or unlock the doors
• You should be careful not to
press the remote control button
on the digital key (smartphone)
accidentally.
• If the digital key (smartphone) is
discharged or defective or you
cannot use the digital key since the
vehicle battery is discharged, use the
inside door lock button to lock all of
the doors.
• Digital Key smartphone app may
not work properly in following
conditions.
-If you are running an important
feature of your smartphone.
(Phone call, emergency call, audio
function, NFC payment, etc.)
-When connecting and using
wireless earphones. (Phone call,
emergency call, audio function)
-When the function of the digital
key app is restricted by the
smartphone manufacturer’s
setting value or application
execution priority policy.
CAUTION
• Hyundai digital key app on the
smartphone and card key may not
work if any of the following occurs:
-Hyundai digital key app on the
smartphone is deleted. (Required
to reinstall the app)
-Account log in information of
Hyundai digital key app is expired.
(Required to re-log in)
-When you try to log in to another
smartphone instead of the
registered smartphone with same
user account.
-Smartphone rooting or app
hacking is detected.
-Smartphone battery or the vehicle
battery is discharged.
-Smartphone’s screen is off or locked.
-NFC or Bluetooth is turned off on
the smartphone settings.
-Smartphone’s mobile network
setting is off or airplane mode is
activated.
-A credit card is overlapped in the
back of your smartphone or metal
or thick case is used.
-Use the card key with insert it
into the wallet or card holder or
overlapping with other cards.
-If you use a smart phone cover that
uses wireless communication or is
made of metal, the digital key NFC
function may not work properly.
Remove the smart phone cover
before using the digital key NFC
function.
à If you change the smartphone
number, you should modify the user
account information on the HYUNDAI
customer web site to use the digital
key app.
ÃIf the vehicle owner changes
the smartphone device, the new
smartphone should be registered in
the car after deleting the registered
digital key(smartphone).

Convenient Features
5-32
Rear Occupant Alert (ROA)
System
The Rear Occupant Alert (ROA) system
is provided to help prevent exiting the
vehicle with the rear passenger left in the
vehicle. When you open the front door
after opening and closing the rear door
and turning off the engine, the “Check
rear seats” warning message appears on
the cluster.
„„Cluster
ODN8A059339
„„Steering wheel
ODN8A059134
CAUTION
• The system does not actually detect
objects or people in the rear seat. By
using a rear door opened and closed
history, the system indicates that
there may be something in the rear
seat.
• The rear door opened and closed
history can be initialized only when
you turn off the engine normally, get
off the vehicle and lock the door with
the remote control key. Therefore,
there could be alarms even though
the back doors are locked.
ex) When you get in and drive your
vehicle without locking the doors after
the alarm sounds, there could be the
alarm sounds if you turn off the engine
and open the driver’s seat door.
WARNING
It does not use the actual sensors but it
provides the alarm sounds by checking
the rear door lock/unlock status as a
reminder.

05
5-49
Side View Mirrors
ODN8059024
Make sure to adjust the side view mirrors
to your desired position before you begin
driving.
Your vehicle is equipped with both
left-hand and right-hand side view
mirrors. The mirrors can be adjusted
remotely with the remote switch. The
side view mirrors can be folded to help
prevent damage when going through
an automatic car wash or when passing
through a narrow street.
The right side view mirror is convex.
Objects seen in the mirror are closer than
they appear.
Use the inside rear view mirror or look
back directly to determine the actual
distance of other vehicles prior to
changing lanes.
WARNING
Do not adjust or fold the side view
mirrors while driving. This may cause
loss of vehicle control resulting in an
accident.
NOTICE
• Do not scrape ice off the mirror face;
this may damage the surface of the
glass.
• If the mirror is jammed with ice, do
not adjust the mirror by force. Use an
approved spray de-icer (not radiator
antifreeze) spray, or a sponge or soft
cloth with very warm water, or move
the vehicle to a warm place and
allow the ice to melt.
Side View Mirror Adjustment
ODN8A059026
Adjusting the side view mirrors:
1. Press either the L (driver’s side) or R
(passenger’s side) button (1) to select
the side view mirror you would like to
adjust.
2. Use the mirror adjustment control
switch to position the selected mirror
up, down, left or right.
3. After adjustment, put the button into
neutral (center) position to prevent
inadvertent adjustment.

Convenient Features
5-50
NOTICE
• The mirrors stop moving when
they reach the maximum adjusting
angles, but the motor continues to
operate while the switch is pressed.
Do not press the switch longer than
necessary, because this can damage
the motor.
• Do not attempt to adjust the side
view mirrors by hand, because this
can damage the motor.
Folding the side view mirrors
ODN8059024L
To fold the side view mirrors, grasp the
housing of the mirror and then fold it
inwards.
Reverse Parking Aid Function
(if equipped)
ODN8A059028
When you press the R (Reverse) button,
the side view mirror(s) will rotate
downwards to aid with driving in reverse.
The position of the side view mirror
switch (1) determines whether or not the
mirrors will move:
Left/Right : When either the L (L eft) or R (Right) switch is selected,
both side view mirrors will
move.
Neutral : When neither switch is selected, the side view mirrors will not
move.
The side view mirrors will automatically
revert to their original positions if any of
the following occur:
• The ignition switch is placed to either
the LOCK/OFF position or the ACC
position.
• The shift button is selected to any
position except R (Reverse).
• The remote control side view mirror
switch is not selected.

05
5-127
Steering Wheel Audio Control
ODN8059228
NOTICE
Do not operate multiple audio remote
control buttons simultaneously.
VOLUME (VOL + / -) (1)
• Press the VOLUME switch up to
increase volume.
• Press the VOLUME switch down to
decrease volume.
SEEK/PRESET ( / ) (2)
If the SEEK/PRESET switch is pressed up
or down and held for 0.8 second or more,
it will function in the following modes:
• RADIO mode
It will function as the AUTO SEEK
select button. It will SEEK until you
release the button.
• MEDIA mode
It will function as the FF/RW button.
If the SEEK/PRESET switch is pressed up
or down, it will function in the following
modes:
• RADIO mode
It will function as the PRESET STATION
UP/DOWN button.
• MEDIA mode
It will function as the TRACK UP/
DOWN button.
MODE (3)
Press the MODE button to toggle
through Radio, SXM, or AUX modes.
MUTE () (4)
• Press the MUTE button to mute the
sound.
• Press the MUTE button again to
activate the sound.
Information
Detailed information for audio control
buttons are described in a separately
supplied manual with the vehicle.