2020 Hyundai Ioniq Plug-in Hybrid engine overheat

6-13
What to do in an emergency
6
7. If you cannot find the cause of the
overheating, wait until the engine
temperature has returned to nor-
mal. Then, if coolant has been
lost, carefully add coolant to the
reservoir to bring the fluid level in
the reservoir up to the halfway
mark.
8. Proceed with caution, keeping
alert for further signs of overheat-
ing. If overheating happens again,
call an authorized HYUNDAI deal-
er for assistance.
Serious loss of coolant indi-
cates a leak in the cooling sys-
tem and should be checked as
soon as possible by an author-
ized HYUNDAI dealer.
CAUTION
Your vehicle is
equipped with a pres-
surized coolant
reserve tank. NEVER
remove the coolant
reserve tank cap or the radiator
drain plug while the engine and
radiator are HOT. Hot coolant
and steam may blow out under
pressure, causing serious
injury.
Turn the engine off and wait
until the engine cools down.
Use extreme care when remov-
ing the coolant reserve tank
cap. Wrap a towel or thick rag
around it, and turn it counter-
clockwise slowly to release
some of the pressure from the
system. Step back while the
pressure is released.
When you are sure all the pres-
sure has been released, contin-
ue turning the cap counter-
clockwise to remove it.
WARNING

6-27
What to do in an emergency
6
The Tire Mobility Kit is not designed
or intended as a permanent tire
repair method and is to be used for
one tire only.
This instruction shows you step by
step how to temporarily seal the
puncture simply and reliably.
Read the section "Notes on the safe
use of the Tire Mobility Kit".
Notes on the safe use of the
Tire Mobility Kit
Park your car at the side of the
road so that you can work with the
Tire Mobility Kit away from moving
traffic.
To be sure your vehicle will not
move, even when you're on fairly
level ground, always set your park-
ing brake.
Only use the Tire Mobility Kit for
sealing/inflation passenger car
tires. Only punctured areas located
within the tread region of the tire
can be sealed using the tire mobil-
ity kit.
Do not use on motorcycles, bicy-
cles or any other type of tires. When the tire and wheel are dam-
aged, do not use Tire Mobility Kit
for your safety.
Use of the Tire Mobility Kit may not
be effective for tire damage larger
than approximately 0.15 inch (4
mm).
Please contact the nearest
HYUNDAI dealership if the tire
cannot be made roadworthy with
the Tire Mobility Kit.
Do not use the Tire Mobility Kit if a
tire is severely damaged by driving
run flat or with insufficient air pres-
sure.
Do not remove any foreign objects
such as nails or screws that have
penetrated the tire.
Provided the car is outdoors, leave
the engine running. Otherwise
operating the compressor may
eventually drain the car battery.
Never leave the Tire Mobility Kit
unattended while it is being used.
Do not leave the compressor run-
ning for more than 10 minutes at a
time or it may overheat. Do not use the Tire Mobility Kit if
the ambient temperature is below
-22°F (-30°C) or over 158°F
(70°C).
In case of skin contact with the-
sealant, wash the area thoroughly-
with plenty of water.If the irritation-
persists, seek medical attention.
In case of eye contact with the
sealant,flush your eyes for at least
15 minutes.If the irritation persists,
seekmedical attention.
In case of swallowing the
sealant,rinse the mouth and drink
plenty ofwater.However, never give
anythingto an unconscious person
and seekmedical attention immedi-
ately.
Long time exposure to the sealant-
may cause damage to bodily tis-
suesuch as kidney, etc.

7-20
Maintenance
Recommended coolant
When adding coolant, use only
distilled (deionized) water for your
vehicle and never mix hard water in
the coolant filled at the factory.
An improper coolant mixture can
result in severe malfunction or
engine/hybrid system damage.
The engine in your vehicle has alu-
minum engine parts and must be
protected by an phosphate-based
ethylene glycol coolant to prevent
corrosion and freezing.
Do not use alcohol or methanol
coolant or mix them with the spec-
ified coolant.
Do not use a solution that contains
more than 60% antifreeze or less
than 35% antifreeze, which would
reduce the effectiveness of the
solution. Make sure the coolant cap is
properly closed after refilling
coolant. Otherwise the engine
could be overheated while driv-
ing.
1. Check if the coolant cap label
is straight In front.
(Continued)WARNING
OTL075062
■Engine room front view
(Continued)
2. Make sure that the tiny pro-
trusions inside the coolant
cap is securely interlocked.
OAE076050
■Engine compartment rear view

7-21
7
Maintenance
For mixing percentage, refer to the
following table:
Information
If in doubt about the mix ratio, a 50%
water and 50% antifreeze mix is the
easiest to mix together as it will be the
same quantity of each. It is suitable to
use for most temperature ranges of
-31°F (-35 °C) and higher.
Changing Coolant
Have coolant changed by an author-
ized HYUNDAI dealer according to
the Maintenance Schedule at the
beginning of this chapter.
To prevent damage to engine
parts, put a thick towel around the
radiator cap before refilling the
coolant to prevent the coolant
from overflowing into engine
parts, such as the alternator.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.
NOTICE
i
Ambient
TemperatureMixture Percentage
(volume)
Antifreeze Water
5°F (-15°C) 35 65
-13°F (-25°C) 40 60
-31°F (-35°C) 50 50
-49°F (-45°C) 60 40
Do not use engine coolant or
antifreeze in the washer fluid
reservoir.
Engine coolant can severely
obscure visibility when sprayed
on the windshield and may
cause loss of vehicle control
resulting in an accident.
Engine coolant may also cause
damage to paint and body trim.
WARNING
H HY
YB
BR
RI
ID
D
S
ST
TA
AR
RT
TE
ER
R
&
&

G GE
EN
NE
ER
RA
AT
TO
OR
R
(
(H
HS
SG
G)
)
B
BE
EL
LT
T
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.
WARNING
When the HSG belt is worn out
or damaged, replace the belt.
Otherwise, it may cause engine
overheating or battery dis-
charge.
CAUTION

I-5
If the engine overheats ....................................................6-12
If the vehicle will not Start ...............................................6-3
If you have a flat tire ......................................................6-20
With Spare Tire ..........................................................6-20
With Tire Mobility Kit (TMK) - Type A ...................6-25
With Tire Mobility Kit (TMK) - Type B ...................6-33
Important safety precautions.............................................2-2
Air Bag Hazards ...........................................................2-2
Always Wear Your Seat Belt ........................................2-2
Control Your Speed ......................................................2-3
Driver Distraction.........................................................2-2
Keep Your Vehicle in Safe Condition ..........................2-3
Restrain All Children....................................................2-2
In case of an emergency while driving .............................6-2
If the Engine Stalls While Driving...............................6-2
If the Vehicle Stalls at a Crossroad or Crossing ..........6-2
If You Have a Flat Tire While Driving ........................6-3
Infotainment system..........................................................4-2
Antenna ........................................................................4-2
Audio/Video/Navigation system ..................................4-5
Bluetooth
®Wireless Technology Hands-Free..............4-4
Steering Wheel Audio Controls....................................4-3
USB and iPod
®port .....................................................4-2
Instrument cluster ...........................................................3-58
Gauges and Meters .....................................................3-61
Instrument Cluster Control .........................................3-60
LCD Display Messages ..............................................3-80
Warning and Indicator Lights.....................................3-67Interior features ............................................................3-162
Cargo Security Screen ..............................................3-168
Clock ........................................................................3-166
Clothes Hanger .........................................................3-167
Cup Holder ...............................................................3-162
Floor Mat Anchor(s) .................................................3-168
Power Outlet ............................................................3-163
Sunvisor ....................................................................3-163
Wireless Cellular Phone Charging System ..............3-164
Lane Following Assist (LFA) ......................................5-135
LFA operation ...........................................................5-136
Limitations of the system .........................................5-139
Warning message......................................................5-137
Lane Keeping Assist (LKA) ...........................................5-77
Limitations of the System ..........................................5-83
LKA operation ............................................................5-79
LKA system function change .....................................5-85
Warning light and message ........................................5-82
LCD Display ..................................................................3-96
LCD Display Control .................................................3-96
LCD Display Modes ..................................................3-97
Light bulbs ......................................................................7-55
Daytime Running Light (DRL) ..................................7-60
Headlamp, Parking Lamp, Turn Signal Lamp and
Side marker ..............................................................7-55
High Mounted Stop Lamp Replacement....................7-64
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