2020 HYUNDAI SONATA HYBRID battery

05
5-11
Battery Type: CR2032
To replace the battery:
1. Remove the mechanical key.
2. Use a slim tool to pry open the rear
cover of the smart key.
3. Remove the old battery and insert the
new battery. Make sure the battery
position is correct.
4. Reinstall 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.
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.

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.

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).

05
5-29
In case of an emergency
ODN8059291
If the electrical power door lock switch
is not operating (ex. dead car battery)
the only way to lock the door(s) is with
the mechanical key from the outside key
hole.
Doors without an outside key hole can be
locked as follows:
1. Open the door.
2. Insert the key into the emergency door lock hole and turn the key
horizontally to lock.
3. Close the door securely.
Information
If the electrical power to door lock switch
is not operating (ex. dead car battery) and
the trunk is closed, you will not be able to
open the trunk until power is restored.
Operating Door Locks from
Inside the Vehicle
With the door handle
ODN8059012
Front door
If the inner door handle is pulled when
the door is locked, the door will unlock
and open.
Rear door
If the inner door handle is pulled once
when the door is locked, the door will
unlock. If the inner door handle is pulled
once more, the door will open.
Information
If a power door lock ever fails to function
while you are in the vehicle try one or
more of the following techniques to exit:
• Operate the door unlock feature
repeatedly (both electronic and
manual) while simultaneously pulling
on the door handle.
• Operate the other door locks and
handles, front and rear.
• Lower a front window and use the
mechanical key to unlock the door from
outside.

05
5-35
ODN8A059019
The Driver Position Memory System is
provided to store and recall the following
memory settings with a simple button
operation.
-Driver’s seat position (Power seat)
-Side view mirror position
-Instrument panel illumination intensity
-Head Up Display (HUD) position and
brightness (if equipped)
WARNING
Never attempt to operate the driver
position memory system while the
vehicle is moving.
This could result in loss of control, and
an accident causing death, serious
injury, or property damage.
Information
• If the battery is disconnected, the
memory settings will be erased.
• If the Driver Position Memory System
does not operate normally, have the
system checked by an authorized
HYUNDAI dealer.
Storing Positions into Memory
1. Shift to P (Park) while the ignition
switch is in the ON position.
2. Adjust the driver’s seat position, side
view mirror position, instrument panel
illumination intensity and head-up
display height/brightness to positions
comfortable for the driver.
3. Press the SET button. The system
will beep once and notify you “Press
button to save settings” on the cluster
LCD display.
4. Press one of the memory buttons (1
or 2) within 4 seconds. The system
will beep twice when the memory has
been successfully stored.
5. “Settings 1 (or 2) saved” will appear on
the cluster LCD display.
DRIVER POSITION MEMORY SYSTEM (IF EQUIPPED)

Convenient Features
5-38
STEERING WHEEL
Electric Power Steering (EPS)
The system assists you with steering the
vehicle. If the vehicle is turned off or
if the power steering system becomes
inoperative, you may still steer the
vehicle, but it will require increased
steering effort.
Also, the steering effort becomes heavier
as the vehicle’s speed increases and
becomes lighter as the vehicle’s speed
decreases for better control of the
steering wheel.
Should you notice any change in the
effort required to steer during normal
vehicle operation, have the system
checked by an authorized HYUNDAI
dealer.
CAUTION
• If the Electric Power Steering System
does not operate normally, the
warning light (
) will illuminate
on the instrument cluster. You may
steer the vehicle, but it will require
increased steering efforts. Take your
vehicle to an authorized HYUNDAI
dealer and have the system checked
as soon as possible.
• When an abnormality is detected
in the electric power steering
system, to prevent a an accident, the
steering assist function may become
inoperative. At this time, the warning
light turns on or blinks on the cluster.
The steering wheel may become
difficult to control or operate. Have
your vehicle checked immediately,
after moving the vehicle to a safe
area.
Information
The following symptoms may occur during
normal vehicle operation:
• The steering effort may be high
immediately after placing the ignition
switch in the ON position.
This happens as the system performs
the EPS system diagnostics. When the
diagnostics are completed, the steering
wheel effort will return to its normal
condition.
• When the battery voltage is low, you
might have to put more steering effort.
However, it is a temporary condition so
that it will return to normal condition
after charging the battery.
• A click noise may be heard from the
EPS relay after the ignition switch is in
the ON or LOCK/OFF position.
• Motor noise may be heard when the
vehicle is at a stop or at a low driving
speed.
• When you operate the steering wheel
in low temperatures, abnormal noise
may occur. If the temperature rises, the
noise will disappear. This is a normal
condition.
• When an error is detected from the
EPS, the steering effort assist function
may become inoperative in order to
prevent fatal accidents. Instrument
cluster warning lights may be on or the
steering effort may be high. If these
symptoms occur, drive the vehicle to
a safe area as soon as it is safe to do
so. Have the system checked by an
authorized HYUNDAI dealer as soon
as possible.

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.

Convenient Features
5-58
Resetting the Sunroof
ODN8A059039
The sunroof may need to be reset if the
following conditions occur:
• The battery is discharged or
disconnected or the sunroof fuse has
been replaced or disconnected
• The sunroof control lever is not
operating correctly
To reset the sunroof, perform the
following steps:
1. Turn the engine on and close
the sunroof glass and sunshade
completely.
2. Release the control lever.
3. Push and hold the sunroof control
lever (1) forward (to close the
sunshade) for about 10 seconds until
the sunroof moves slightly, then
release the control lever.
4. Push and hold the sunroof control
lever forward until the sunroof
operates as follows:
TILT DOWN → SLIDE OPEN → SLIDE CLOSE
Then, release the control lever.
When this is complete, the sunroof
system is reset.
For more information, contact an
authorized HYUNDAI dealer.
Information
If you do not reset the sunroof, it may not
work properly.
Sunroof Open Warning
(if equipped)
• If the driver turns off the engine
when the sunroof is not fully closed,
the warning chime will sound for
approximately 3 seconds and the
sunroof open warning will appear on
the cluster LCD display.
• If the driver turns off the engine and
opens the door when the sunroof is
not fully closed, the sunroof open
warning will appear on the cluster
LCD display until the door is closed or
the sunroof is fully closed.
Close the sunroof securely when leaving
your vehicle.