2021 HYUNDAI SONATA key

06
6-23
Information
• A clicking sound may be heard while
operating or releasing the EPB. These
conditions are normal and indicate that
the EPB is functioning properly.
• When leaving your keys with a parking
attendant or assistant, make sure to
inform him/her how to operate the
EPB.
OIK057079N
AUTO HOLD turning Off!
Press brake pedal
When the conversion from Auto Hold to
EPB is not working properly a warning
will sound and a message will appear.
OIK057077N
Parking brake automatically engaged
If the EPB is applied while Auto Hold is
activated, a warning will sound and a
message will appear.
EPB malfunction indicator
ODN8069014
This warning light illuminates if the
ignition switch is set to the ON position
and goes off in approximately 3 seconds
if the system is operating normally.
If the EPB malfunction indicator
remains on, comes on while driving, or
does not come on when the ignition
switch is changed to the ON position,
this indicates that the EPB may have
malfunctioned.
If this occurs, have the system checked
by an authorized HYUNDAI dealer.
The EPB malfunction indicator may
illuminate when the ESC indicator comes
on to indicate that the ESC is not working
properly, but it does not indicate a
malfunction of the EPB.
NOTICE
• If the EPB warning light is still on,
have the system checked by an
authorized HYUNDAI dealer.
• If the parking brake warning light
does not illuminate or blinks even
though the EPB switch was pulled
up, the EPB may not be applied.
• If the parking brake warning light
blinks when the EPB warning light is
on, press the switch, and then pull it
up. Repeat this one more time. If the
EPB warning does not go off, have
the system checked by an authorized
HYUNDAI dealer.

06
6-35
OIK057086N
The auto start is temporarily deactivated
in the following situations.
When the gear is shifted from N (Neutral)
to R (Reverse), D (Drive) or Manual
shift mode without the brake pedal
depressed. A message "Press brake pedal
for Auto Start" will appear on the LCD
display. To activate auto start, depress
the brake pedal.
To Deactivate the ISG System
• Press the ISG OFF button to
deactivate the ISG system. Then, the
ISG OFF button indicator illuminates.
• Press the ISG OFF button again to
reactivate the ISG system. Then, the
ISG OFF button indicator turns OFF.
ISG System Malfunction
The ISG system may not operate:
When there is a malfunction with the ISG
sensors or the ISG system.
The followings occur, when there is a
malfunction with the ISG system:
• The auto stop indicator (
) will blink
in yellow on the instrument cluster.
• The light on the ISG OFF button will
illuminate.
Information
• When you cannot turn OFF the ISG
OFF button indicator by pressing
the ISG OFF button, or when the
malfunction with the ISG system
persists, contact an authorized
HYUNDAI dealer.
• You can turn off the ISG OFF button
indicator by driving over 50 mph (80
km/h) for up to 2 hours with the fan
speed below the 2nd position. If the
ISG OFF button indicator remains
ON, contact an authorized HYUNDAI
dealer.
WARNING
When the engine is in auto stop mode,
the engine may restart. Before leaving
the vehicle or checking the engine
compartment, stop the engine placing
the ignition switch to the LOCK/OFF
position or remove the ignition key.

06
6-145
Change to "winter weight" oil if
necessary
In some climates it is recommended that
a lower viscosity "winter weight" oil be
used during cold weather. See chapter 8
for recommendations. If you aren't sure
what weight oil you should use, consult
an authorized HYUNDAI dealer.
Check battery and cables
Winter puts additional burdens on the
battery system. Visually inspect the
battery and cables as described in
chapter 8. The level of charge in your
battery can be checked by an authorized
HYUNDAI dealer or a service station.
Check spark plugs and ignition
system
Inspect your spark plugs as described in
chapter 8 and replace them if necessary.
Also check all ignition wiring and
components to be sure they are not
cracked, worn or damaged in any way.
Use approved window washer anti-
freeze in system
To keep the water in the window washer
system from freezing, add an approved
window washer anti-freeze solution in
accordance with instructions on the
container. Window washer anti-freeze is
available from an authorized HYUNDAI
dealer and most auto parts outlets. Do
not use engine coolant or other types
of antifreeze as these may damage the
paint finish.
Do not let your parking brake freeze
Under some conditions your parking
brake can freeze in the engaged position.
This is most likely to happen when
there is an accumulation of snow or
ice around or near the rear brakes or
if the brakes are wet. If there is a risk
the parking brake may freeze, apply
it only temporarily while you put the
gear selector lever in P and block the
rear wheels so the car cannot roll. Then
release the parking brake.
Do not let ice and snow accumulate
underneath
Under some conditions, snow and ice
can build up under the fenders and
interfere with the steering. When driving
in severe winter conditions where this
may happen, you should periodically
check underneath the car to be sure the
movement of the front wheels and the
steering components is not obstructed.
Don't place foreign objects
or materials in the engine
compartment
Placement of foreign object or materials
which prevent cooling of the engine, in
the engine compartment, may cause a
failure or combustion. The manufacturer
is not responsible for the damage caused
by such placement.
To keep locks from freezing
To keep the locks from freezing, squirt
an approved de-icer fluid or glycerine
into the key opening. If a lock is covered
with ice, squirt it with an approved de-
icing fluid to remove the ice. If the lock
is frozen internally, you may be able to
thaw it out by using a heated key. Handle
the heated key with care to avoid injury.

Maintenance
8-52
Instrument panel fuse panel
Fuse Name (A)Circuit Protected
S/HEATER (FRT) 25A Front Seat Warmer Control Module, Front Air Ventilation Seat
Control Module
TRUNK 10AICU Junction Block (Trunk Lid Relay)
DOOR LOCK 20AICU Junction Block (Door Lock Relay,
Door Unlock Relay, Two Turn Unlock Relay)
MODULE1 7.5A Key Solenoid
MODULE3 10ADriver Door Module, Passenger Seat Relax Unit,
Hazard Switch, Crash Pad Switch (Up),
Front Mood Lamp Unit, Start/stop Button Switch,
Driver/Passeger Smart Key Outside Handle
S/HEATER (RR) 25A Rear Seat Warmer Control Module
P/SEAT (PASS) 30APassenger Seat Manual Switch, Passenger Seat Relax Unit
MODULE6 10ADriver Door Module
SAFETY
P/WINDOW (RH) 30APassenger Safety Power Window Module,
Rear Power Window Switch RH
P/SEAT (DRV) 30ADirver Seat Manual Switch, Driver IMS Module
IBU1 15A IBU, Driver/Passenger Door NFC Module, IAU,
BLE Unit, Ignition Switch
AMP 25A AMP, DC-DC Converter (AMP)
SAFETY
P/WINDOW (LH) 30ADriver Safety Power Window Module,
Rear Power Window Switch LH
BRAKE SWITCH 10AIBU, Stop Lamp Switch
SUNROOF2 20APanorama Sunroof, Data Link Connector
AIR BAG2 10ASRS Contorl Module
AIR BAG1 15A SRS Contorl Module, Passenger Occupant Detection Sensor
E-SHIFTER1 10ASCU, Electronic ATM Shift Lever
MEMORY 10ADriver IMS Module, Security Indicator, A/C Switch,
Driver/Passenger Power Outside Mirror,
A/C Control Module, Instrument Cluster,
Rain Sensor, Head-Up Display

08
8-57
Consult an authorized HYUNDAI dealer
to replace most vehicle light bulbs. It is
difficult to replace vehicle light bulbs
because other parts of the vehicle must
be removed before you can get to the
bulb. This is especially true for removing
the headlamp assembly to get to the
bulb(s).
Removing/installing the headlamp
assembly can result in damage to the
vehicle.
Information
The headlamp and tail lamp lenses could
appear frosty if the vehicle is washed after
driving or the vehicle is driven at night
in wet weather. This condition is caused
by temperature difference between the
lamp inside and outside and, it does not
indicate a problem with your vehicle.
When moisture condenses in the lamp,
it will be removed after driving with the
headlamp on. The removable level may
differ depending on lamp size, lamp
position and environmental condition.
However, if moisture is not removed, we
recommend that your vehicle is inspected
by an authorized HYUNDAI dealer.
WARNING
• Prior to replacing a lamp, depress
the foot brake, move the shift button
into P (Park) apply the parking brake,
place the ignition switch to the
LOCK/OFF position, and take the key
with you when leaving the vehicle
to avoid sudden movement of the
vehicle and to prevent possible
electric shock.
• Be aware the bulbs may be hot and
may burn your fingers.
Headlamp, Parking Lamp,
Daytime Running Light, Turn
Signal Lamp, Cornering Lamp
and Side Marker
Type A (LED)
ODN8A089027
(1) Headlamp (High)
(2)

H
eadlamp (Low)
(3)

A
uxiliary lamp
(4)
Da

ytime running lamp (DRL)/Parking
lamp/Turn signal lamp
(5)

Side mark
er
Type B (LED)
ODN8A089026
(1) Headlamp (High) (with sub LOW)
(2)
H
eadlamp (Low)
(3)

A
uxiliary lamp
(4)
Da

ytime running lamp (DRL)/Parking
lamp/Turn signal lamp
(5)

Side mark
er
light BulBS

Maintenance
8-68
NOTICE
Using anything but recommended
cleaners and procedures may affect the
fabric’s appearance and fire-resistant
properties.
Leather (if equipped)
• Features of seat leather
- L

eather is made from the outer skin
of an animal, which goes through a
special process to be available for
use. Since it is a natural product,
each part differs in thickness or
density.
Wrinkles may appear as a natural
result of stretching and shrinking
depending on the temperature and
humidity.
- The sea

t is made of stretchable
fabric to improve comfort.
- The parts con

tacting the body are
curved and the side supporting
area is high which provides driving
comfort and stability.
- W

rinkles may appear naturally
from usage. It is not a fault of the
products.
CAUTION
• Wrinkles or abrasions which appear
naturally from usage are not covered
by warranty.
• Belts with metallic accessories,
zippers or keys inside the back
pocket may damage the seat fabric.
• Make sure not to wet the seat. It may
change the nature of natural leather.
• Jeans or clothes which could bleach
may contaminate the surface of the
seat covering fabric. •
Caring for the leather seats
- V
acuum the seat periodically to
remove dust and sand on the seat. It
will prevent abrasion or damage of
the leather and maintain its quality.
- Wipe the na
tural leather seat cover
often with dry or soft cloth.
- U
se of proper leather protector may
prevent abrasion of the cover and
helps maintain the color. Be sure to
read the instructions and consult
a specialist when using leather
coating or protective agent.
- Ligh
t colored (beige, cream beige)
leather is easily contaminated and
the stain is noticeable. Clean the
seats frequently.
- A
void wiping with wet cloth. It may
cause the surface to crack.
• Cleaning the leather seats
- R
emove all contaminations
instantly. Refer to instructions below
for removal of each contaminant.
- Cosme
tic products (sunscreen,
foundation, etc.)
Apply cleansing cream on a cloth
and wipe the contaminated spot.
Wipe off the cream with a wet cloth
and remove water with a dry cloth. - Be verages (coffee, soft drink, etc.)
Apply a small amount of neutral
detergent and wipe until
contaminations do not smear.
- Oil R

emove oil instantly with
absorbable cloth and wipe with
stain remover used only for natural
leather.
- Che

wing gum
Harden the gum with ice and
remove gradually.

Maintenance
8-72
Perchlorate Material-special handling may apply, See:
www.dtsc.ca.gov/hazardouswaste/perchlorate.
Notice to California Vehicle Dismantlers:
Perchlorate containing materials, such as air bag inflators, seatbelt pretensioners and
keyless remote entry batteries, must be disposed of according to Title 22 California
Code of Regulations Section 67384.10 (a).
California pErChloratE no tiCE

Index
I-8
Horn ........................................................................\
.............................................5-45
How to use this manual

........................................................................\
................. 1-4
Hyundai digital key........................................................................\
...................... 5-15 Digital key application


........................................................................\
............ 5-15
Digital key (smartphone) NFC function


.........................................................5-15
Digital key (smartphone)........................................................................\
......... 5-16
Digital key (card key)........................................................................\
.............. 5-23
I
If the engine doesn’t turn over or turns over slowly
.............................................. 7-3
If the engine overheats


........................................................................\
................... 7-6
If the engine stalls at a crossroad or crossing


........................................................7-2
If the engine stalls while driving


........................................................................\
... 7-2
If the engine turns over normally but doesn’t start


................................................7-3
If the engine will not start


........................................................................\
.............. 7-3
If you have a flat tire while driving


....................................................................... 7-3
Ignition switch


........................................................................\
............................... 6-6
Key ignition switch


........................................................................\
................... 6-6
Engine Start/Stop button
........................................................................\
........... 6-9
Remote start


........................................................................\
............................ 6-12
Immobilizer system


........................................................................\
..................... 5-14
Improtant safety precautions........................................................................\
.......... 3-2 Always wear your seat belt


........................................................................\
....... 3-2
Restrain all children


........................................................................\
.................. 3-2
Air bag hazards
........................................................................\
......................... 3-2
Driver distraction


........................................................................\
...................... 3-2
Control your speed


........................................................................\
.................... 3-2
Keep your vehicle in safe condition


.................................................................. 3-2
In case of emergency while driving


....................................................................... 7-2
Infotainment system........................................................................\
................... 5-152 AUX, USB and iPo
d® port ........................................................................\
..... 5-152
Antenna

........................................................................\
................................. 5-152
Steering wheel audio controls


....................................................................... 5-153
Bluetooth
® Wireless Technology hands-free ................................................. 5-154
Audio /
Video / Navigation system

............................................................... 5-154
Blue Link
® center ........................................................................\
.................. 5-154
Inside rearview mirror

........................................................................\
................. 5-46