2018 Hyundai Ioniq Hybrid engine overheat

2-24
Safety system of your vehicle
Rear seat warmers (if equipped)
While 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

3-60
Convenient features of your vehicle
Engine Coolant
Temperature Warning
Light
This warning light illuminates:
• When the engine coolant temper-
ature 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.
Master Warning Light
This indicator light illuminates:
• When there is a malfunction in oper-
ation in any of the following systems:
- Low washer fluid (if equipped)
- Exterior lamp malfunction
- Blind Spot Detection (BSD) mal-
function (if equipped)
- Autonomous Emergency Braking
(AEB) malfunction (if equipped)
- Smart cruise control malfunction
(if equipped)
- Tire Pressure Monitoring System
(TPMS, if equipped)
- Service reminder
To identify the details of the warning,
look at the LCD display.
Low Tire Pressure
Warning Light
(if equipped)
This warning light illuminates:
• Once you turn the ignition switch or
Engine Start/Stop button to the ON
position.
- It illuminates for approximately 3
seconds and then goes off.
• When one or more of your tires are
significantly underinflated.
For more information, refer to
“Tire Pressure Monitoring System
(TPMS)” in chapter 6.
120km/h

3-69
Convenient features of your vehicle
3
Low Pressure (if equipped)
This warning message is displayed if
the tire pressure is low. The corre-
sponding tire on the vehicle will be
illuminated.
For more information, refer to
"Tire Pressure Monitoring System
(TPMS)" in chapter 6.
Turn on "FUSE SWITCH"
This warning message is displayed if
the fuse switch located on the fuse
box under the steering wheel is OFF.
You should turn the fuse switch on.
For more information, refer to
“Fuses” in chapter 7.
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 fueling 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.
■Type B ■Type A
OAE046114L/OAE046115LOLFH044149L

3-100
Convenient features of your vehicle
Driving style
The driving style is displayed when
you are driving in ECO mode.
When you drive in SPORT mode,
each driving category will be dis-
played with “--”.
Energy flow
The hybrid system informs the driv-
ers its energy flow in various operat-
ing modes. While driving, the current
energy flow is specified in 11 modes.
For more information, refer to HEV
Energy Flow in the “Hybrid System
Overview” provided in front of the
owner’s manual.
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 “H
(Hot)” 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
OAE046148L/OAE046124L
■Type A■Type B■Type A■Type B
OAE046125L
■Type B
OAE046149L/OAEQ046001L

3-106
Driving style
The driving style is displayed when
you are driving in ECO mode.
When you drive in SPORT mode,
each driving category will be dis-
played with “--”.
Energy flow
The hybrid system informs the driv-
ers its energy flow in various operat-
ing modes. While driving, the current
energy flow is specified in 11 modes.
For more information, refer to HEV
Energy Flow in the “Hybrid System
Overview” provided in front of the
owner’s manual.
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 “H
(Hot)” 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
Convenient features of your vehicle
OAE046148L/OAE046124L
■Type A■Type B■Type A■Type B
OAE046125L
■Type B
OAE046149L/OAEQ046001L

3-137
Convenient features of your vehicle
3
Information
• When using the air conditioning sys-
tem, monitor the temperature gauge
closely while 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
indicates 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.• Operating the air conditioning sys-
tem in the recirculated air position
provides maximum cooling, how-
ever, continual operation in this
mode may cause the air inside the
vehicle to become stale.
• During cooling operation, you may
occasionally notice a misty air flow
because of rapid cooling and
humid air intake. This is a normal
system operation characteristic.
i

3-149
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
OAE046426
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

5-18
Driving your vehicle
• If the vehicle is held or creeping
forward on an incline by applying
the accelerator pedal, the clutch
and transmission may overheat
which can result in damage. At this
time, a warning message will
appear on the LCD display.
• If the LCD warning is active, the
foot brake must be applied.
• Ignoring the warnings can lead to
damage to the transmission.
To hold the vehicle on a hill use
the foot brake or the parking
brake. If the vehicle is held by
applying the accelerator pedal on
a hill, the clutch and transmission
will be overheated resulting in
damage.
Transmission high temperature
• Under certain conditions, such as
repeated stop-and-go launches on
steep grades, sudden take off or
acceleration, or other harsh driving
conditions, the transmission clutch
temperatures will increase exces-
sively.
• When the clutch temperatures are
too high, the "Transmission temp is
high! Stop safely" warning mes-
sage will appear on the LCD dis-
play, a chime will sound, and the
transmission shifting may not be
smooth.• 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.
NOTICE
OTLE055023