2021 HYUNDAI SONATA trunk

6-136
• The vehicle height gets lower or
higher due to heavy loading in a trunk,
abnormal tire pressure, etc.
• When the temperature of the rear
bumper is high.
• When the sensors are blocked by
other vehicles, walls or parking-lot
pillars.
• The vehicle drives on a curved road.
• The road pavement (or the peripheral
ground) abnormally contains metallic
components (i.e. possibly due to
subway construction).
• There is a fixed object near the
vehicle, such as a guardrail.
• While going down or up a steep
road where the height of the lane is
different.
• Driving on a narrow road where trees
or grass or overgrown.
• Driving in rural areas where the sensor
does not detect another vehicle for an
extended period of time.
• Driving on a wet road.
• Driving on a road where the guardrail
or wall is in double structure.
• A big vehicle is near such as a bus or
truck.
• When the other vehicle approaches
very close.
• When the other vehicle passes at a
very fast speed.
• While changing lanes. •
If the vehicle has started at the same
time as the vehicle next to you and
has accelerated.
• When the vehicle in the next lane
moves two lanes away from you or
when the vehicle two lanes away
moves to the next lane from you.
• A motorcycle or bicycle is near.
• A flat trailer is near.
• If there are small objects in the
detecting area such as a shopping
cart or a baby stroller.
• If there is a low height vehicle such as
a sports car.
• The brake pedal is depressed.
• ESC (Electronic Stability Control) is
activated.
• ESC (Electronic Stability Control)
malfunctions.
• The tire pressure is low or a tire is
damaged.
• The brake is reworked.
• The vehicle sharply stops.
• Temperature is extremely low around
the vehicle.
• The vehicle severely vibrates while
driving over a bumpy road, uneven/
bumpy road, or concrete patch.
• The vehicle drives on a slippery
surface due to snow, water puddle,
or ice.
• If the vehicle moves backward after
the vehicle is parked with a diagonal
line
While Driving

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

Maintenance
8-56
Engine compartment fuse panel
Fuse Name (A)Circuit Protected
FUSE HEATED
MIRROR 10ADriver/Passenger Power Outside Mirror, A/C Switch,
A/C Control Module, ECM
ECU5 10A[G4FN] ECM
AMS 10ABattery Sensor
FUEL PUMP 1 20AE/R Junction Block (Fuel Pump Relay)
A/C 2 10AA/C Control Module
B+4 60AICU Junction Block (Long Term Load Latch Relay,
Fuse - MODULE3, AIR BAG2, E-SHIFTER1, SUNROOF1,
SUNROOF2, S/HEATER (FRT), TRUNK, BRAKE SWITCH,
DOOR LOCK)

08
8-59
ODN8A089063
Stop lamp (Bulb)
1.
Open trunk lid and disconnect the
nega

tive battery cable.
2.

R
emove the luggage side trim.
ODN8089032
3. Remove the socket from the assembly by turning the socket
counterclockwise until the tabs on
the socket align with the slots on the
assembly.
4.
R

emove the bulb from the socket
by pressing it in and rotating it
counterclockwise until the tabs on the
bulb align with the slots in the socket.
Pull the bulb out of the socket.
5.

Insert a ne
w bulb by inserting it into
the socket and rotating it until it locks
into place.
6.

Ins
tall the socket in the assembly by
aligning the tabs on the socket with
the slots in the assembly. Push the
socket into the assembly and turn the
socket clockwise. Stop/Taill/Backup lamp and rear side
marker (LED type)
If the LED lamp does not operate, have
the vehicle checked by an authorized
HYUNDAI dealer.
Reverse lamp (bulb type)
ODN8089051L
1. Disconnect the nega
tive battery
cable.
2.

R
emove the side under cover.
3.

R
emove the socket from the
assembly by turning the socket
counterclockwise until the tabs on
the socket align with the slots on the
assembly.
4.
R

emove the bulb from the socket by
pulling it straight out.
5.

Insert a ne
w bulb by pushing it in into
the socket.
6.

Ins
tall the socket into the assembly by
aligning the tabs on the socket with
the slots in the assembly. Push the
socket into the assembly and turn the
socket clockwise.
7.
R

einstall the lamp assembly to the
body of the vehicle.

08
8-61
„„Map lamp
ODN8A089035
„„Room lamp • Without sunroof
ODN8089036
„„Vanity mirror lamp
OJS078041
„„Trunk lamp
ODN8089037
Interior Light Bulb Replacement
Map lamp, Room lamp, Vanity mirror lamp and trunk lamp (Bulb type)
1. Using a flat-blade screwdriver, gently pry the lens from the interior lamp housing.
2.
R
emove the bulb by pulling it straight out.
WARNING
Prior to working on the Interior Lights, ensure that the “OFF” button is depressed to
avoid burning your fingers or receiving an electric shock.
3.

Ins
tall a new bulb in the socket.
4.
Align the lens tabs with the in

terior lamp housing notches and snap the lens into
place.
NOTICE
Use care not to dirty or damage lens, lens tab, and plastic housings.

I
I-5
Clock ........................................................................\
..........................................5-150
Clothes hanger

........................................................................\
........................... 5-150
Crankcase emission control system
..................................................................... 8-70
Cup holder

........................................................................\
................................. 5-145
Curtain air bags


........................................................................\
............................ 3-41
D
Daytime running light (DRL)


........................................................................\
...... 5-74
Declaration of conformity........................................................................\
............ 6-79 The radio frequency components (Rear Corner Radar) complies


...................6-79
Defroster
........................................................................\
.................................... 5-142
Dimensions
........................................................................\
.................................... 2-7
Door locks
........................................................................\
.................................... 5-31
Central door lock/unlock switch


..................................................................... 5-33
Child-protector rear door lock


........................................................................\
. 5-35
Auto door lock/unlock features
....................................................................... 5-34
Operating door locks from outside the vehicle


...............................................5-31
Operating door locks from inside the vehicle


.................................................5-32
Rear Occupant Alert (ROA) system
................................................................ 5-36
Vehicle Auto-Shut Off Function
..................................................................... 5-37
Drive mode integrated control system


................................................................ 6-37
Drive mode


........................................................................\
.............................. 6-37
Driver Attention Warning (DAW)
...................................................................... 6-86
Leading vehicle departure alert


....................................................................... 6-91
Driver position memory system........................................................................\
... 5-39 Storing positions into memory


........................................................................\
5-39
Easy access function


........................................................................\
............... 5-41
Driver’s air bag
........................................................................\
............................ 3-39
Driving at night


........................................................................\
.......................... 6-141
Driving in flooded areas


........................................................................\
............ 6-142
Driving in the rain


........................................................................\
...................... 6-141
E
Electric Power Steering (EPS)


........................................................................\
..... 5-42
Electronic Stability Control (ESC)


...................................................................... 6-29
Emergency towing


........................................................................\
....................... 7-19
Emergency trunk safety release


........................................................................\
... 5-66

Index
I-6
Emission control system ........................................................................\
.............. 8-69
Crankcase emission control system

................................................................ 8-70
Evaporative emission control System


.............................................................8-70
Exhaust emission control system
.................................................................... 8-70
Engine compartment


........................................................................\
.............. 2-6, 8-3
Engine compartment panel fuse replacement


......................................................8-50
Engine coolant


........................................................................\
............................. 8-21
Engine coolant temperature gauge........................................................................\
. 4-4
Engine number


........................................................................\
............................. 2-14
Engine oil


........................................................................\
..................................... 8-19
Engine specification........................................................................\
....................... 2-7
Engine Start/Stop button


........................................................................\
................ 6-9
Evaporative emission control System


.................................................................. 8-70
Event Data Recorder (EDR)


........................................................................\
.......... 1-8
Exhaust emission control system


........................................................................\
. 8-70
Explanation of scheduled maintenance items


......................................................8-16
Exterior care........................................................................\
................................. 8-63
Exterior features........................................................................\
........................... 5-64 Hood
........................................................................\
........................................ 5-64
Trunk

........................................................................\
....................................... 5-65
Emer

gency trunk safety release....................................................................... 5-66
Fuel Filler Door


........................................................................\
....................... 5-70
Exterior overview Front view
........................................................................\
................................. 2-2
Rear view


........................................................................\
.................................. 2-3
F
Flat tire


........................................................................\
......................................... 7-12
Changing spare tire


........................................................................\
................ 7-12
Floor mat anchor(s)........................................................................\
.................... 5-151
Fluid Brake fluid


........................................................................\
............................... 8-24
Washer fluid


........................................................................\
............................ 8-25
Forward Collision-Avoidance Assist (FCA)


.......................................................6-40
FCA-Junction Turning function


...................................................................... 6-55
Forward/Reverse Parking Distance Warning (PDW)
..........................................5-99

Index
I-10
L
LabelVehicle certification label


........................................................................\
........ 2-13
Tire specification and pressure label


............................................................... 2-14
Refrigerant label


........................................................................\
...................... 2-15
Lane change signals


........................................................................\
..................... 5-79
Lane Following Assist (LFA)
........................................................................\
.... 6-116
Lane Keeping Assist (LKA)

........................................................................\
........ 6-59
LCD display (T

ype A, B) ........................................................................\
............. 4-19
LCD display control


........................................................................\
................ 4-19
LCD display modes


........................................................................\
................. 4-20
Trip computer


........................................................................\
.......................... 4-31
LCD display (Type C)
........................................................................\
................. 4-34
LCD display control


........................................................................\
................ 4-34
View modes
........................................................................\
............................. 4-35
Utility view mode


........................................................................\
.................... 4-36
Option menu


........................................................................\
............................ 4-38
User settings mode


........................................................................\
.................. 4-39
LCD display messages
........................................................................\
................. 4-15
Shift to P

or N to start engine

........................................................................\
.. 4-15
Shift to P
........................................................................\
.................................. 4-15
Low key battery........................................................................\
....................... 4-15
Press brake pedal to start engine


..................................................................... 4-15
Key not in vehicle


........................................................................\
................... 4-16
Key not detected


........................................................................\
...................... 4-16
Press START button again


........................................................................\
...... 4-16
Press START button with key


........................................................................\
. 4-16
Battery discharging due to external electrical devices


....................................4-16
Check BRAKE SWITCH fuse
........................................................................\
4-16
Door, Hood, Trunk open indicator


.................................................................. 4-17
Sunroof open indicator


........................................................................\
............ 4-17
Lights mode


........................................................................\
............................. 4-17
Wiper mode


........................................................................\
............................. 4-18
Low pressure
........................................................................\
........................... 4-17