2021 HYUNDAI SONATA HYBRID engine

Convenient Features
5-22
5. If the key is enrolled, the message
will be displayed on the infotainment
screen or instrument cluster.
• Once the card key registration mode
is activated, the process should be
completed within 5 minutes. After
then, you should reactivate once
again for registration.
• For the digital key(card key) saving,
the smart key(fob) must be exist inside
of vehicle.
• Once a Card key is registered, it
cannot be reuse onto another vehicle.
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ODN8A059132
Digital key (Card key) deletion
You should have the smart key to delete
the digital key (card key) so please carry
around the key.
1. Get on the vehicle with the smart key.
2. Delete the NFC card key on the User’s
Settings menu after turning on the
engine.
ÃWith Navigation screen : From the
infotainment screen menu, go to
[Setup] - [Vehicle] - [Digital Key] -
[Card Key] then select the [Delete]
from submenu.
ÃWithout navigation screen : From
cluster menu, go to [Digital Key] -
[Card Key] and select [Delete].
If there is no saved digital key(card key),
[Delete] menu will not be activated.
• To delete the saved digital key (card
key), the smart key must be exist
inside the vehicle.
• The deleted digital key (card key) can
be re-registered before registering a
new digital key (card key).
• If you try to register a new digital key
(card key), the previously registered
digital key (card key) cannot be used
again.

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
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„„Type B
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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.

05
5-31
WARNING
If you stay in the vehicle for a long time
while the weather is very hot or cold,
there are risks of injuries or danger to
life. Do not lock the vehicle from the
outside when someone is in the vehicle.
WARNING
Opening a door when something is
approaching may cause damage or
injury. Be careful when opening doors
and watch for vehicles, motorcycles,
bicycles or pedestrians approaching the
vehicle in the path of the door.
Automatic Door Lock and Unlock
Features
Your vehicle is equipped with features
that will automatically lock or unlock
your vehicle based on settings you select
in the LCD cluster display.
Auto LOCK - Enable on Speed
When this feature is set in the LCD
cluster display, all the doors will be
locked automatically when the vehicle
exceeds 9 mph (15 kph).
Auto LOCK - Enable on Shift
When this feature is set in the LCD
cluster display, all the doors will be
locked automatically when the vehicle is
shifted out of P (Park) while the engine
is running. (Only when the engine is
running.)
Auto UNLOCK - Enable on Shift
When this feature is set in the LCD
cluster display, all the doors will be
unlocked automatically when the vehicle
is shifted back into P (Park). (Only when
the engine is running.)
For more information on these features,
refer to the LCD Display section later in
this chapter.
Additional Unlock Safety Feature -
Air Bag Deployment
As an additional safety feature, all doors
will be automatically unlocked when an
impact causes the air bags to deploy.

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
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„„Steering wheel
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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
5-33
Child-Protector Rear Door Locks
ODN8059015L
The child safety lock is provided to help
prevent children seated in the rear from
accidentally opening the rear doors. The
rear door safety locks should be used
whenever children are in the vehicle.
The child safety lock is located on the
edge of each rear door. When the child
safety lock is in the lock position, the
rear door will not open if the inner door
handle is pulled.
To lock the child safety lock, insert a
small flat blade tool (like a screwdriver or
similar) (1) into the slot and turn it to the
lock position as shown.
To allow a rear door to be opened from
inside the vehicle, unlock the child safety
lock.
WARNING
If children accidently open the rear
doors while the vehicle is in motion,
they could fall out of the vehicle. The
rear door safety locks should always
be used whenever children are in the
vehicle.
Vehicle Auto-Shut Off Function
If your parked vehicle in a garage is on
for a period of time, the engine turns
off automatically to prevent carbon
monoxide poisoning.
System setting
Select ‘User Settings → Convenience → Vehicle Auto-Shut Off’ in the LCD display.
ODN8A059340
Operating conditions
Vehicle Auto-Shut Off timer activates
when the following conditions are met.
• Ignition [ON] or engine running
• Shift button is in P (Park) position
• Unfastened driver’s seat belt
• Even one of the doors opens
Deactivations
• In case of selecting “Disable” for
Vehicle Auto-Shut Off in the User
Settings mode (30 min. based timer is
reset automatically if you restart.)
• Gear shift other than P
• Fastened driver’s seat belt
• Step on the brake or accelerator
System operation
At the set time on Vehicle Auto-Shut Off
timer, the engine turns off automatically.

Convenient Features
5-34
THEFT-ALARM SYSTEM
This system helps to protect your vehicle
and valuables. The horn will sound and
the hazard warning lights will blink
continuously if any of the following
occur:
-A door is opened without using the
remote key or smart key.
-The trunk is opened without using the
remote key or smart key.
-The engine hood is opened.
The alarm continues for 30 seconds, then
the system resets. To turn off the alarm,
unlock the doors with the remote key or
smart key.
The Theft Alarm System automatically
sets 30 seconds after you lock the doors
and the trunk. For the system to activate,
you must lock the doors and the trunk
from outside the vehicle with the remote
key or smart key or by pressing the
button on the outside of the door handle
with the smart key in your possession.
The hazard warning lights will blink and
the chime will sound once to indicate the
system is armed.
Once the security system is set, opening
any door, the trunk, or the hood without
using the remote key or smart key will
cause the alarm to activate.
The Theft Alarm System will not set if the
hood, the trunk, or any door is not fully
closed. If the system will not set, check
the hood, the trunk, or the doors are fully
closed.
Do not attempt to alter this system or
add other devices to it.
Information
• Do not lock the doors until all
passengers have left the vehicle. If the
remaining passenger leaves the vehicle
when the system is armed, the alarm
will be activated.
• If the vehicle is not disarmed with the
remote key or smart key, open the
doors by using the mechanical key
and place the ignition switch in the
ON position (for remote key) or start
the engine (for smart key) by directly
pressing the ignition switch with the
smart key.
• If the system is disarmed by unlocking
the vehicle, but neither a door or the
trunk is opened within 30 seconds, the
doors will relock and the system will
rearm automatically.

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
5-40
Heated Steering Wheel
(if equipped)
ODN8059104
When the ignition switch is in the ON
position or when the engine is running,
press the heated steering wheel button
to warm the steering wheel. The
indicator on the button will illuminate.
To turn the heated steering wheel off,
press the button again. The indicator on
the button will turn off.
• The heated steering wheel defaults
to the OFF position whenever the
ignition switch is in the ON position.
However, if the Auto Comfort Control
function is ON, the heated steering
wheel will turn on and off depending
on the outside temperature.
• Auto Comfort Control (for driver’s
seat) (if equipped)
The heated steering wheel
automatically controls the steering
wheel temperature depending on
the ambient temperature when
the engine is running. If the heated
steering wheel switch is pushed, the
heated steering wheel will have to be
controlled manually.
To use this function, it must be
activated from the Settings menu in
the infotainment system screen.
For more information, refer to the
separately supplied manual with
your vehicle.
Information
The heated steering wheel will turn off
automatically approximately 30 minutes
after the heated steering wheel is turned
on.
NOTICE
Do not install any cover or accessory
on the steering wheel. This cover or
accessory could cause damage to the
heated steering wheel system.