2020 HYUNDAI SONATA HYBRID engine overheat

Maintenance
8-18
Turn the vehicle off and wait until
the engine cools down. Use extreme
care when removing the engine
coolant cap and/or inverter coolant
cap. Wrap a thick towel around it,
and turn it counterclockwise slowly
while the pressure is released from
the cooling system. When you are sure
all the pressure has been released,
using a thick towel, continue turning
counterclockwise to remove it.
Information
The engine coolant and/or inverter coolant
level is influenced by the hybrid system
temperature. Before checking or refilling
the engine coolant and/or inverter coolant,
turn the hybrid vehicle off.
WARNING
The electric motor for the cooling fan may continue to
operate or start up when the
engine is not running and can
cause serious injury. Keep
hands, clothing and tools away
from the rotating fan blades of
the cooling fan.
Keep hands, clothing and tools away
from the rotating fan blades of the
cooling fan.
Always turn off the vehicle unless the
vehicle has to be inspected with the
engine on. Be cautious as the cooling
fan may operate if the negative (-)
battery terminal is not disconnected.
WARNING
Make sure the coolant cap is properly
closed after refilling coolant. Otherwise
the engine could be overheated while
driving.
„„Engine compartment front view
OOSH089010L
1. Check if the coolant cap label is
straight In front.
„„Engine compartment rear view
ODN8H089044
2. Make sure that the tiny protrusions
inside the coolant cap is securely
interlocked.

Maintenance
8-20
Checking the Hybrid Starter &
Generator (HSG) Belt
Have the Hybrid Starter & Generator
(HSG) belt inspected or replaced
according to the Maintenance Schedule
in this chapter by an authorized
HYUNDAI dealer.
CAUTION
When the HSG belt is worn out or
damaged, replace the belt.
Otherwise, it may cause engine
overheating or battery discharge.
WARNING
• Turn the vehicle off while you inspect
the engine or Hybrid Starter &
Generator (HSG) belt. Otherwise it
may result in serious injury.
• Keep hands, clothing etc. away from
the Hybrid Starter & Generator (HSG)
belt.
Checking the Brake Fluid Level
ODN8H089005
Check the fluid level in the reservoir
periodically. The fluid level should be
between MAX and MIN marks on the side
of the reservoir.
Before removing the reservoir cap and
adding brake fluid, clean the area around
the reservoir cap thoroughly to prevent
brake fluid contamination.
If the level is low, add the specified brake
fluid to the MAX level. The level will fall
with accumulated mileage. This is a
normal condition associated with the
wear of the brake linings. If the fluid level
is excessively low, have the brake system
checked by an authorized HYUNDAI
dealer.
WARNING
If the brake system requires frequent
additions of fluid this could indicate
a leak in the brake system. Have the
vehicle inspected by an authorized
HYUNDAI dealer.
HYBRID STARTER &
GENERATOR (HSG) BELT BRAKE FLUID

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If the 12 volt battery is discharged
........................................................................\
7-4
If the engine overheats
........................................................................\
..................7-7
If the engine stalls at a crossroad or crossing
........................................................7-2
If the engine stalls while driving
........................................................................\
..7-2
If the engine will not start
........................................................................\
.............7-3
If you have a flat tire while driving
......................................................................7-3
Ignition switch
........................................................................\
..............................6-6
Engine Start/Stop button
........................................................................\
..........6-6
Remote start
........................................................................\
.............................6-9
Immobilizer system
........................................................................\
....................5-11
Important 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 an emergency while driving
.................................................................7-2
Infotainment system ........................................................................\
................... 5-126
USB and iPod® port
........................................................................\
............5-126
Antenna
........................................................................\
................................5-126
Steering wheel audio controls
......................................................................5-127
Bluetooth® Wireless Technology hands-free ...............................................5-128
Audio / Video / Navigation system
..............................................................5-128
Blue Link® center
........................................................................\
................5-128
Inside rearview mirror
........................................................................\
................5-42
Instrument cluster
........................................................................\
.........................4-4
Adjusting instrument cluster illumination
........................................................4-5
Gauges and meters
........................................................................\
...................4-5
Transmission shift indicator
........................................................................\
.....4-9
Warning and indicator lights
........................................................................\
..4-10
LCD display messages
........................................................................\
...........4-19
LCD display (Type A, B)
........................................................................\
.......4-26
LCD display (Type C)
........................................................................\
............4-39

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LCD display (Type C) ........................................................................\
................4-39
LCD display control
........................................................................\
...............4-39
View modes
........................................................................\
............................4-40
Utility view mode
........................................................................\
...................4-41
Option menu
........................................................................\
...........................4-43
User settings mode
........................................................................\
.................4-44
LCD display messages
........................................................................\
................4-19
Shift to P to start engine
........................................................................\
..........4-19
Shift to P
........................................................................\
.................................4-19
Low key battery ........................................................................\
....................... 4-19
Press brake pedal to start engine
....................................................................4-19
Key not in vehicle
........................................................................\
..................4-19
Key not detected
........................................................................\
.....................4-19
Press START button again
........................................................................\
.....4-19
12V bettery discharging due to additional electrical devices
..........................4-19
Press START button with key
........................................................................\
4-20
Check BRAKE SWITCH fuse
.......................................................................4-20
Door, Hood, Trunk open indicator
.................................................................4-20
Sunroof open indicator
........................................................................\
...........4-20
Press START button while turning wheel
.......................................................4-20
Check steering wheel lock system
..................................................................4-20
Lights mode
........................................................................\
............................4-21
Wiper mode
........................................................................\
............................4-21
Low pressure
........................................................................\
..........................4-21
Low washer fluid ........................................................................\
..................... 4-21
Low fuel
........................................................................\
..................................4-21
Engine has overheated ........................................................................\
............. 4-21
Check exhaust system
........................................................................\
.............4-22
Check headlight
........................................................................\
.......................4-22
Check turn signal ........................................................................\
..................... 4-22
Check brake light
........................................................................\
....................4-22
Check headlamp LED
........................................................................\
.............4-22
Check Active Air Flap system
........................................................................\
.4-22