2020 Hyundai Ioniq Hybrid engine overheat

2-23
Safety system of your vehicle
2
Rear seat warmers (if equipped)
Whilst the engine is running, push
either of the switches to warm the rear
seat.
During mild weather or under condi-
tions where the operation of the seat
warmer is not needed, keep the
switches in the OFF position.Each time you push the switch, the
temperature setting of the seat is
changed as follows :
The seat warmer defaults to the OFF
position whenever the ignition switch
is placed to the ON position.
Information
With the seat warmer switch in the
ON position, the heating system in the
seat turns off or on automatically
depending on the seat temperature.
Battery cooling duct
The hybrid battery cooling duct is
located on the left side of the rear
seats. The cooling duct cools down
the hybrid battery.
When the hybrid battery cooling duct
is blocked, the hybrid battery may be
overheated. Do not obstruct the cool-
ing duct with any other objects.
i
OFF →HIGH ( ) →LOW ( )
→
OAE036023
OAE036024
■Hybrid vehicle
OAEPH036024
■Plug-in hybrid vehicle

3-62
Convenient features of your vehicle
If the engine does not stop
immediately after the Engine Oil
Pressure Warning Light is illumi-
nated, severe damage could
result.
If the warning light stays on
whilst the engine is running, it
indicates that there may be seri-
ous engine damage or malfunc-
tion. In this case:
1. Stop the vehicle as soon as it
is safe to do so.
2. Turn off the engine and check
the oil level. If the oil level is
low, fill the engine oil to the
proper level.
3. Start the engine again. If the
warning light stays on after the
engine is started, turn the
engine off immediately. In this
case, we recommend that you
have the vehicle inspected by
an authorised HYUNDAI deal-
er.
Low Fuel Level
Warning Light
This warning light illuminates:
When the fuel tank is nearly empty.
Add fuel as soon as possible.
Driving with the Low Fuel Level
warning light on or with the fuel
level below "0 or E" can cause the
engine to misfire and damage the
catalytic converter (if equipped).
Engine Coolant
Temperature Warning
Light
This warning light illuminates:
When the engine coolant tempera-
ture is above 120°C (248°F). This
means that the engine is overheat-
ed and may be damaged.
If your vehicle is overheated, refer
to “Overheating” in chapter 6.
Overspeed Warning
Light (if equipped)
This warning light blinks:
When you drive the vehicle more
than 120 km/h.
- This is to prevent you from driving
your vehicle with overspeed.
- The overspeed warning chime
also sounds for approximately 5
seconds.
NOTICE
NOTICE
120km/h

3-70
Convenient features of your vehicle
Key not detected
(for smart key system)
This warning message is displayed if
the smart key is not detected when you
press the Engine Start/Stop button.
Press START button again
(for smart key system)
This message is displayed if you
were unable to start the vehicle when
the Engine Start/Stop button was
pressed.
If this occurs, attempt to start the
engine by pressing the Engine
Start/Stop button again.
If the warning message appears
each time you press the Engine
Start/Stop button, we recommend
that you have your vehicle inspected
by an authorised HYUNDAI dealer.
Press START button with key
(for smart key system)
This warning message is displayed if
you press the Engine Start/Stop but-
ton whilst the warning message “Key
not detected” is displayed.
At this time, the immobiliser indicator
light blinks.
Check BRAKE SWITCH fuse
(for smart key system)
This warning message is displayed if
the brake switch fuse is disconnected.
You need to replace the fuse with a
new one before starting the engine.
If that is not possible, you can start the
engine by pressing the Engine
Start/Stop button for 10 seconds in the
ACC position.
Shift to P to start vehicle
(for smart key system)
This warning message is displayed if
you try to start the engine with the
shift lever not in the P (Park) position.
Low Washer Fluid (if equipped)
This warning message is displayed
if the washer fluid level in the reser-
voir is nearly empty.
Have the washer fluid reservoir
refilled.
Low Fuel
This warning message is displayed if
the fuel tank is almost out of fuel.
When this message is displayed, the
low fuel level warning light in the
cluster will come on.
It is recommended to look for the
nearest fuelling station and refuel as
soon as possible.
Add fuel as soon as possible.
Engine has overheated
This warning message is displayed
when the engine coolant tempera-
ture is above 120°C (248°F). This
means that the engine is overheated
and may be damaged.
If your vehicle is overheated, refer
to "Overheating" in chapter 6.

3-99
Convenient features of your vehicle
3
Engine coolant temperature
This gauge indicates the tempera-
ture of the engine coolant when the
engine is running.
When the gauge indicator gets out
of the normal range, toward the
“Red” position, it indicates over-
heating of the engine. It may dam-
age the engine.
Do not continue driving with the
overheated engine. For further
information, refer to “If the Engine
Overheats” in the chapter 6.
NOTICE
OAEPH049125L

3-105
Convenient features of your vehicle
Engine coolant temperature
This gauge indicates the tempera-
ture of the engine coolant when the
engine is running.When the gauge indicator gets out
of the normal range, toward the
“Red” position, it indicates over-
heating of the engine. It may dam-
age the engine.
Do not continue driving with the
overheated engine. For further
information, refer to “If the Engine
Overheats” in the chapter 6.
NOTICE
3
OAEPH049125L

3-144
Convenient features of your vehicle
The refrigerant system should
only be serviced by trained and
certified technicians to insure
proper and safe operation.
The refrigerant system should
be serviced in a well-ventilated
place.
The air conditioning evaporator
(cooling coil) shall never be
repaired or replaced with one
removed from a used or sal-
vaged vehicle and new replace-
ment MAC evaporators shall be
certified (and labelled) as meet-
ing SAE Standard J2842.
Information
• When using the air conditioning sys-
tem, monitor the temperature gauge
closely whilst driving up hills or in
heavy traffic when outside tempera-
tures are high. Air conditioning sys-
tem operation may cause engine
overheating. Continue to use the fan
but turn the air conditioning system
off if the temperature gauge indi-
cates engine overheating.
• When opening the windows in
humid weather, air conditioning
may create water droplets inside the
vehicle. Since excessive water
droplets may cause damage to elec-
trical equipment, air conditioning
should only be used with the win-
dows closed.
Air conditioning system operation
tips
If the vehicle has been parked in
direct sunlight during hot weather,
open the windows for a short time
to let the hot air inside the vehicle
escape.
Use air conditioning to reduce
humidity and moisture inside the
vehicle on rainy or humid days.
During air conditioning system
operation, you may occasionally
notice a slight change in engine
speed as the air conditioning com-
pressor cycles. This is a normal
system operation characteristic.
Use the air conditioning system
every month only for a few minutes
to ensure maximum system per-
formance.
When using the air conditioning
system, you may notice clear water
dripping (or even puddling) on the
ground under the passenger side
of the vehicle. This is a normal sys-
tem operation characteristic.
iNOTICE

3-157
Convenient features of your vehicle
3
Power outlet (if equipped)
The power outlet is designed to pro-
vide power for mobile telephones or
other devices designed to operate
with vehicle electrical systems. The
devices should draw less than 180
W(Watts) with the engine running.To prevent damage to the Power
Outlets :
Use the power outlet only when
the engine is running and remove
the accessory plug after use.
Using the accessory plug for pro-
longed periods of time with the
engine off could cause the battery
to discharge.
Only use 12V electric accessories
which are less than 180 W(Watts)
in electric capacity.
Adjust the air-conditioner or
heater to the lowest operating
level when using the power outlet.
Close the cover when not in use.
Some electronic devices can
cause electronic interference
when plugged into a vehicle’s
power outlet. These devices may
cause excessive audio static
and malfunctions in other elec-
tronic systems or devices used
in your vehicle.
Push the plug in as far as it will
go. If good contact is not made,
the plug may overheat and the
fuse may open. Plug in battery equipped electri-
cal/electronic devices with
reverse current protection. The
current from the battery may
flow into the vehicle's electri-
cal/electronic system and cause
system malfunction.
NOTICE
OAEPH049426R
Avoid electrical shocks. Do not
place your fingers or foreign
objects (pin, etc.) into a power
outlet or touch the power outlet
with a wet hand.
WARNING

5-19
Driving your vehicle
5
If this occurs, pull over to a safe
location, stop the vehicle with the
engine running, apply the brakes
and shift the vehicle to P (Park),
and allow the transmission to cool.
If you ignore this warning, the driv-
ing condition may become worse.
You may experience abrupt shifts,
frequent shifts, or jerkiness.
When the message "Trans cooled.
Resume driving." appears you can
continue to drive your vehicle.
When possible, drive the vehicle
smoothly.
Transmission overheated
If the vehicle continues to be driv-
en and the clutch temperatures
reach the maximum temperature
limit, the "Trans Hot! Park with
engine on" warning will be dis-
played. When this occurs the clutch
is disabled until the clutch cools to
normal temperatures. The warning will display a time to
wait for the transmission to cool.
If this occurs, pull over to a safe
location, stop the vehicle with the
engine running, apply the brakes
and shift the vehicle to P (Park),
and allow the transmission to cool.
When the message "Trans cooled.
Resume driving." appears you can
continue to drive your vehicle.
When possible, drive the vehicle
smoothly.
If any of the warning messages in the
LCD display continue to blink, for
your safety, we recommend that you
contact an authorised HYUNDAI
dealer and have the system checked.
OAD058177N
OAEPH059616L/OAEPH059617L