HYUNDAI SONATA 2021 Owners Manual

05
5-11
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 (7) 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).
Remote smart parking assist (RSPA)
(if equipped)
The Remote smart parking assist (RSPA)
system helps the drivers park their
vehicle by using sensors to measure
parking spaces and control the steering
wheel, gear shift and vehicle speed to
semi-automatically park the vehicle.
With the smart key, the driver can move
the vehicle forward or backward using
the rearward /forward buttons (5, 6) on
the smart key.
For information, refer to “Remote smart
parking assist (RSPA)” in this chapter.

Convenient Features
5-12
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.
Smart key precautions
The smart key may not work if any of the
following occur:
• The smart key is close to a radio
transmitter such as a radio station or
an airport which can interfere with
normal operation of the transmitter.
• The smart key is near a mobile two
way radio system or a cellular phone.
• Another vehicle’s smart key is being
operated close to your vehicle.
If the smart key does not work correctly,
open and close the door with the
mechanical key. If you have a problem
with the smart key, contact an authorized
HYUNDAI dealer.
If the smart key is in close proximity to
your mobile phone, the signal could be
blocked by your mobile phone’s normal
operational signals. This is specifically
relevant when the phone is active such
as making and receiving calls, text
messaging, and/or sending/receiving
emails. When possible, avoid keeping the
smart key and your mobile phone in the
same location such as a pants or jacket
pocket in order to avoid interference
between the two devices.
Information
This device complies with Part 15 of the
FCC rules.
Operation is subject to the following three
conditions:
1.

This device may not cause harmful
interfer

ence, and
2.

This device must accept any
interfer

ence received, including
interference that may cause undesired
operation.
3.

Changes or
modifications not expressly
approved by the party responsible
for compliance could void the user’s
authority to operate the device.
NOTICE
Keep the smart key away from
electromagnetic materials that blocks
electromagnetic waves to the key
surface.
NOTICE
Always have the smart key with you
when leaving the vehicle. If the smart
key is left near the vehicle, the vehicle
battery may be discharged.

05
5-13
Battery replacement
OFE048009
ODN8059266
If the Smart Key is not working properly,
try replacing the battery with a new one.
Battery Type: CR2032
To replace the battery:
1.
R
emove the mechanical key.
2.

U
se a slim tool to pry open the rear
cover of the smart key.
3.

R
emove the old battery and insert the
new battery. Make sure the battery
position is correct.
4.
R

einstall the rear cover of the smart
key.
If you suspect your smart key might have
sustained some damage, or you feel
your smart key is not working correctly,
contact an authorized HYUNDAI dealer.
Information
An inappropriately disposed
battery can be harmful to the
environment and human health.
Dispose of the battery according
to your local law(s) or regulation.

Convenient Features
5-14
Immobilizer System
The immobilizer system protects your
vehicle from theft. If an improperly
coded key (or other device) is used, the
engine’s fuel system is disabled.
When the ignition switch is placed in
the ON position, the immobilizer system
indicator should come on briefly, then
go off. If the indicator starts to blink, the
system does not recognize the coding of
the key.
Turn the ignition switch to the LOCK/OFF
position, then turn the ignition switch to
the ON position again.
In some circumstances, the vehicle may
not recognize your smart key if another
smart key device is nearby or a metal
object such as a key chain is causing
interference with the smart key.
If this occurs, your vehicle may not
start. Remove any metal objects or
additional keys near the smart key before
attempting to start the vehicle again.
If the system repeatedly does not
recognize the coding of the key, it is
recommended that you contact your
HYUNDAI dealer.
Do not attempt to alter this system
or add other devices to it. Electrical
problems could result that may make
your vehicle inoperable. WARNING
In order to prevent theft of your
vehicle, do not leave spare keys
anywhere in your vehicle. Your
immobilizer password is a customer
unique password and should be kept
confidential.
NOTICE
The transponder in your key is an
important part of the immobilizer
system. It is designed to give years
of trouble-free service, however you
should avoid exposure to moisture,
static electricity and rough handling.
Immobilizer system malfunction could
occur.
Information
This device complies with Part 15 of the
FCC rules.
Operation is subject to the following three
conditions:
1.
This device may not cause harmful
interfer

ence.
2.

This device must accept any
interfer

ence received, including
interference that may cause undesired
operation.
3.

Changes or
modifications not expressly
approved by the party responsible
for compliance could void the user’s
authority to operate the device

05
5-15
hyundai Digital Key
Digital Key Application
To use Hyundai Digital Key mobile app,
you should install Hyundai digital key
application. Search ‘Hyundai digital key’
in the Google Play Store and download
the app. Please refer to the detailed
manual of the digital key app. The option
can be found under the following app
menu:
Menu → Application Info → Tutorial
Please note the manual before using the
app.
ÃThis service is only a

vailable for
Android smartphones. Please confirm
supported/compatible devices on our
website.
WARNING
For used vehicle
If any of the digital key (smartphone key
or card key) is already registered when
you press ON button after unlocking the
doors, the message ‘Digital key(s) active’
appears on the instrument cluster once.
If you buy a used vehicle, you should
confirm the message and delete the
registered smartphone key and card key.
In addition, please notify the Hyundai
Customer Care Center.
If the card key does not work properly,
please delete the card key and register
the smartphone key and re-register the
card key.
For vehicle maintenance
If you need to have your Digital Key
System repaired or replaced please
ensure you Smartphone Key is still active.
You may have to pair your phone again.
In the case, re-initialize your Digital Keys
using the Hyundai Digital Key mobile app.
Digital key (smartphone) NFC
function
You can use the Digital Key NFC (Near
Field Communication) function after turn
your smartphone NFC settings on. And
you should unlock & turn on smartphone
screen to use it.
à T

o change the NFC mode of the
smartphone, please refer to the
smartphone manual or contact
to the customer service center of
smartphone manufacturers.

Convenient Features
5-16
Digital key (smartphone)
ODN8A059129
ODN8A059240
Hyundai Digital Key (Smartphone)
Pairing
1.
T
urn the vehicle on with the Smart key
and make sure to keep the smart key
inside the vehicle during digital key
registration.
2.

R
egister your Digital key from the
vehicle user setting menu as follows.
à With Na

vigation screen :
From the infotainment screen menu,
go to [Setup] - [Vehicle] - [Digital Key]
- [Smart Phone Key] then select the
[Save] from submenu.
à Without na

vigation screen :
From cluster menu, go to [Digital Key]
- [Smart Phone Key] and select [Save].
Information
The [Save] button will be disabled if the
digital key (Smartphone key) is already
saved.
Please refer to “Digital Key Delete” in this
manual and follow the digital key delete
procedure in your car before Digital key
save.
Please refer to the ‘Tutorial’ on your
Digital key app and delete the previous
saved key in your smartphone before save.
3.

Select the v
ehicle to save on your
Digital key application and activate
the save mode.
à Sa

ve mode is available only on
the vehicle owner’s Digital key
application.
4.
Place the back

side of smartphone
onto the wireless charging pad(in-
vehicle authentication pad).
The saving process will begin
automatically.
5.

Once the digital k
ey save is complete,
a message will be shown on the
infotainment screen or cluster.
6.

R
emove the smartphone from the pad
and complete the saving process.
ODN8059267
[A] : Wireless Charging Pad (In-vehicle Authentication
Pad)

05
5-17
ODN8A059129
ODN8A059130
Hyundai Digital Key (Smartphone Key)
Deletion
1.
T
urn the vehicle on with the Smart
key and make sure to keep the smart
key inside the vehicle during delete
process.
2.

Dele
te your Digital key from the
vehicle user setting menu as follows.
à With Na

vigation screen :
From the infotainment screen menu,
go to [Setup] - [Vehicle] - [Digital Key]
- [Smart Phone Key] then select the
[Delete] from submenu.
à Without na

vigation screen :
From cluster menu, go to [Digital
Key] - [Smart Phone Key] and select
[Delete].
Information
The [Delete] button will be disabled if there
is no digital key (Smartphone key) saved. 3.

Once the digital k
ey delete is
complete, a message will be shown
on the infotainment screen or cluster.
4.
Go t
o [Initialize Digital Key] menu on
the digital key application and select
the vehicle to delete the digital key
information.
• Open the Hyundai Digital Key app →
M

enu → Initialize Digital Key
Ã
If the sa
ved digital key information
in your car is deleted due to vehicle
maintenance, the digital key in your
smartphone should be deleted as well.
à F
or more information, please refer to
the ‘Tutorial’ on your Digital key app.
CAUTION
• If the smartphone is removed
from the interior authentication
pad during enrollment, the saving
process will be cancelled.
• If the infotainment or instrument
cluster screen is changed during
enrollment, the saving process will
be cancelled.
• If the vehicle is turned off during
enrollment, the saving process will
be cancelled.
• If the gear is shifted, the saving
process will be cancelled.
• If you try to save the smartphone
which is not logged in with the
vehicle owner’s ID or if you try to
save the Card key, the saving process
will not begin.
• If the NFC setting on your
smartphone is off, the saving process
will not begin.
• If the smartphone screen is changed
to off or locked status, the saving
process will be cancelled.
• If there is no Smart key during the
save process, the saving process will
not begin.

Convenient Features
5-18
Set up main vehicle
You can manage multiple digital keys
from the Digital key app. From the list of
digital keys you own, select the vehicle
you want to make your priority vehicle.
For more information, please refer to
the ‘Tutorial’ on your Digital key app.
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 remove the smartphone
more than 4 inches (0.1 m) from the door
handle authentication pad and try it
again.

05
5-19
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.
A
fter placing your registered
smartphone onto the interior
authentication pad (wireless charger),
step on the brake and press the
Engine Start/Stop button.
2.

A
fter 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. 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 have 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.

Convenient Features
5-20
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 k
ey application
on the smartphone. Select the
vehicle to activate the remote control
function as a main vehicle.
2.

Appr
oach 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. 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.