2021 HYUNDAI SONATA HYBRID start stop button

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.

Convenient Features
5-16
ODN8059237[1] : Door handle authentication pad
NFC door lock/unlock
You should contact your smartphone’s
NFC antenna(backside of phone) to door
handle authentication pad (1) marked
position near by the lock button) of
driver’s (or front passenger’s) outside
door for 2 seconds to lock or unlock the
doors. If the Two Press Unlock feature
is applied (press twice for unlocking),
driver’s seat door will be unlocked by
contacting the digital key (smartphone
key). In this state, if you contact one
more time within 4 seconds, all the doors
unlock. Please make sure the doors are
locked. If you do not open any of the
doors after unlocking, it automatically
re-lock after 30 seconds.
Note that you cannot lock your vehicle
when you contact NFC antenna in the
smartphone to the door handle pad if
any of the following occurs:
• The Proximity / Smart Key is in the
vehicle.
• The POWER button is in ACC or ON
position.
• Any of the doors, hood and trunk is
opened.
If the smartphone digital key does not
work, please detach the smartphone
more than 4 inches (0.1 m) from the door
handle authentication pad and retry to
contact. After unlock the door or start up the
vehicle with digital key, even though
the driver tries to lock the doors by the
central door lock switch, the door lock
will be once locked and immediately
released at the moment of door closed.
Start-up with Digital Key
1. After placing your registered
smartphone onto the interior
authentication pad (wireless charger),
step on the brake and press the
Engine Start/Stop button.
2. After start-up, the digital key data
will be automatically updated. It
takes 5 to 20 seconds, after that,
the smartphone can be go into the
wireless charging mode automatically.
Once the engine started, you can
remove the smartphone from the pad.
ODN8059267[A] : Wireless Charging Pad (In-vehicle Authentication Pad)
Information
After reconnecting the vehicle battery
power supply or charging the battery, it
may take time to operate due to remote
renewal of security information. When
you lock or unlock the door with NFC,
please contact and hold your smartphone
on the door handle until it works.

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
5-24
Start-up with Card key
After placing your registered card key
onto the interior authentication pad
(wireless charger), step on the brake and
press the Engine Start/Stop button.
WARNING
• If you do not place the digital key
(card key) onto the center of the
interior authentication pad (wireless
charger) exactly, the card key may
not be recognized. If the engine is
not turned on, adjust and place the
key again.
• If you overlap and use the key
with NFC-enabled cards such as
transportation card or credit card,
the card key may not be recognized.
• If the digital key (card key) does not
work, please detach the key around
4 inches (0.1 m) from the handle
authentication pad and retry to
contact.
• The card key may be damaged due to
impact. It would not work properly if
the key is damaged. You should buy a
new card and register again.
For more information, refer to the
Engine Start/Stop button in chapter 6.
„„Type A
ODN8A059133
„„Type B
ODN8A059247
Digital Key Function Enable/Disable
If you do not want to use the digital key
(smartphone and card key), you can
disable the function temporarily. You
should have the smart key when you
change the settings
à With Navigation screen :
From the infotainment screen menu,
go to [Setup] - [Vehicle] - [Digital Key]
- [Enable Digital Keys] (deselect)
ÃWithout navigation screen :
From cluster menu, go to [Digital Key]
- [Enable Digital Keys] (deselect)
Information
For the digital key disable, the smart key
must be exist inside the car. For the digital
key enable, the smart key does not need.

Convenient Features
5-36
Recalling Positions from Memory
1. Shift to P (Park) while the ignition
switch is in the ON position.
2. Press the desired memory button
(1 or 2). The system will beep once,
and then the driver’s seat position,
side view mirror position, instrument
panel illumination intensity and
head-up display height/brightness
will automatically adjust to the stored
positions.
3. “Settings 1 (or 2) applied” will appear
on the cluster LCD display.
If your vehicle is equipped with
additional navigation, please refer to the
infotainment system manual separately
supplied.
Information
• While recalling the “1” memory
position, pressing the SET or 1 button
temporarily stops the adjustment of
the recalled memory position. Pressing
the 2 button recalls the “2” memory
position.
• While recalling the “2” memory
position, pressing the SET or 2 button
temporarily stops the adjustment of
the recalled memory position. Pressing
the 1 button recalls the “1” memory
position.
• While recalling the stored positions,
pressing one of the control buttons
for the driver’s seat, side view mirror,
instrument panel illumination or head-
up display will cause the movement of
that component to stop and move in
the direction that the control button is
pressed.
Resetting the Driver’s Seat
Memory System
Take the following procedures to reset
the driver’s seat memory system, when it
does not operate properly.
To reset the driver’s seat memory
system
1. Place the ignition switch to the ON
position, shift to P (Park), and open
the driver’s door.
2. Operate the control switch to set
the driver’s seat and seatback to the
foremost position.
3. Simultaneously press the SET button
and push forward the seat movement
switch over 2 seconds.
While resetting the driver’s seat
memory system
1. It starts with the notification sound.
2. The driver’s seat and seatback is
adjusted to the rearward position with
the notification sound.
3. The driver’s seat and seatback is
re-adjusted to the default position
(central position) with the notification
sound.
However, in the following cases, the
resetting procedure and the notification
sound may stop.
- The memory button is pressed.
-The control switch is operated.
-The gear is shifted out of P (Park) .
-The driving speed exceeds 2 mph (3
km/h).
-The driver’s door is closed.

05
5-37
NOTICE
• Reattempt to do the resetting
procedure again, when the resetting
procedure incompletely stops or the
notification sound do not stop.
• Make sure that there is no obstacle
around the driver’s seat in advance
of resetting the driver’s seat memory
system.
Easy Access Function
The system will move the driver’s seat
automatically as follows:
• It will move the driver’s seat rearward
when the Engine Start/Stop button is
pressed to the OFF position.
• It will move the driver’s seat forward
when the Engine Start/Stop button is
pressed to the ACC or START position.
You can activate or deactivate the Easy
Access Function from the User Settings
mode in the cluster LCD display.
‘Convenience → Seat Easy Access →
Off/Normal/Extended’.
For more information, refer to “LCD
Display” in chapter 4.If your vehicle is
equipped with additional navigation,
please refer to the infotainment system
manual separately supplied.
CAUTION
Driver should be cautious when using
this function to assure no injury to
passenger or child on the back seat.
In case of emergency the driver has to
stop movement of front seat (when easy
access feature is activated) by pressing
SET button or any of the driver seat
control switches.

Convenient Features
5-44
WARNING
Before programming HomeLink® to a
garage door opener or gate operator,
make sure people and objects are out
of the way of the device to prevent
potential harm or damage. Do not
use the HomeLink® with any garage
door opener that lacks the safety
stop and reverse features required
by U.S. federal safety standards (this
includes any garage door opener model
manufactured before April 1, 1982).
A garage door that cannot detect an
object - signaling the door to stop and
reverse - does not meet current U.S.
federal safety standards. Using a garage
door opener without these features
increases the risk of serious injury or
death.
Programming HomeLink
®
Please note the following:
• When programming a garage door
opener, it is advised to park the
vehicle outside of the garage.
• It is recommended that a new battery
be placed in the hand-held transmitter
of the device being programmed to
HomeLink® for quicker training and
accurate transmission of the radio-
frequency signal.
• Some vehicles may require the
Engine Start/Stop button to be in the
ACC (or “Accessories”) position for
programming and/or operation of
HomeLink®.
• In the event that there are still
programming difficulties or questions
after following the programming steps
listed below, contact HomeLink® at:
www.homelink.com, www.youtube.
com/HomeLinkGentex or by calling
1-800-355-3515. Programming
To program most devices, follow these
instructions:
ODN8H050136N
1. Press and release (1), (2) or (3) button.
• If the indicator (7) is turned ON in
Orange, go to Step 3) since it is a
new programming.
• If the indicator (7) is continuously
turned ON or flashes in Green
rapidly several times, go to Step 2)
since it is a programmed button.
2. Press and hold the button you wish
to program for approximately 15-
25 seconds until the LED flashes in
Orange for several times.
3. Hold the Garage Door Opener Original
Transmitter near the HomeLink Mirror.