2018 Hyundai Ioniq Hybrid coolant change

H41
Switching to Hybrid mode to
allow heating or air condition-
ing (Plug-in hybrid vehicle)
This message is displayed when the
vehicle automatically switches to
HEV mode to allow heating or air
conditioning. It is when the coolant
temperature is low (below -14°C)
and the driver turns on the heating or
cooling system.
If the coolant temperature gets high-
er than -14°C or the driver turns off
the heating or cooling system the
vehicle returns to its default (EV)
mode.
Maintaining Hybrid mode to
allow heating or air condition-
ing (Plug-in hybrid vehicle)
This message is displayed when the
vehicle maintains the HEV mode to
allow heating or air conditioning. The
mode does not change when the
driver presses the [EV/HEV] button
to switch from the HEV mode to EV
mode while the heating and cooling
system is on and the coolant temper-
ature is below -14°C.
Low/High System Temp.
Maintaining Hybrid mode
(Plug-in hybrid vehicle)
This message is displayed when the
temperature of the high-voltage
(hybrid) battery is too low or too high.
This warning message is to protect
the battery and the hybrid system.
OAEPH047207LOAEPH047527LOAEPH047203L/OAEPH047204L

3-78
Switching to Hybrid mode to
allow heating or air condition-
ing (Plug-in hybrid vehicle)
This message is displayed when the
vehicle automatically switches to
HEV mode to allow heating or air
conditioning. It is when the coolant
temperature is low (below -14°C)
and the driver turns on the heating or
cooling system.
If the coolant temperature gets high-
er than -14°C or the driver turns off
the heating or cooling system the
vehicle returns to its default (EV)
mode.
Maintaining Hybrid mode to
allow heating or air condition-
ing (Plug-in hybrid vehicle)
This message is displayed when the
vehicle maintains the HEV mode to
allow heating or air conditioning. The
mode does not change when the
driver presses the [EV/HEV] button
to switch from the HEV mode to EV
mode while the heating and cooling
system is on and the coolant temper-
ature is below -14°C.
Low/High System Temp.
Maintaining Hybrid mode
(Plug-in hybrid vehicle)
This message is displayed when the
temperature of the high-voltage
(hybrid) battery is too low or too high.
This warning message is to protect
the battery and the hybrid system.
Convenient features of your vehicle
OAEPH047527LOAEPH047203L/OAEPH047204LOAEPH047207L

3-96
Convenient features of your vehicle
TRIP COMPUTER (HYBRID VEHICLE)
The trip computer is a microcomput-
er-controlled driver information sys-
tem that displays information related
to driving.
Information
Some driving information stored in the
trip computer (for example Average
Vehicle Speed) resets if the battery is
disconnected.
Trip modes
To change the trip mode, toggle the
“ , ” switch on the steering wheel.
i
• Tripmeter
• Average Vehicle Speed
• Elapsed Time
• Distance to Empty
(Only for cluster type A)
• Average Fuel Economy
• Instant Fuel Economy
Digital Speedometer
Driving Style
Energy Flow
Engine Coolant Temperature
(Only for cluster type B)
OAE046402
■ ■
T T
y y
p p
e e

A A
■ ■
T T
y y
p p
e e

B B
■ ■
T T
y y
p p
e e

C C

5-102
Driving your vehicle
Check battery and cables
Winter temperatures affect battery
performance.Inspect the battery
and cables, as specified in the
chapter 7.The battery charging level
can be checked by an authorized
HYUNDAI dealer or in a service sta-
tion.
Change to "winter weight" oil if
necessary
In some regions during winter, it is
recommended to use the "winter
weight" oil with lower viscosity. For
further information, refer to the chap-
ter 8. When you are not sure about a
type of winter weight oil, consult an
authorized HYUNDAI dealer.Check spark plugs and ignition
system
Inspect the spark plugs, as speci-
fied in the chapter 7.If necessary,
replace them. Also check all ignition
wirings and components for any
cracks, wear-out, and damage.
To prevent locks from freezing
To prevent the locks from being
frozen, spray approved de-icing fluid
or glycerin into key holes. When a
lock opening is already covered with
ice, spray approved de-icing fluid
over the ice to remove it. When an
internal part of a lock freezes, try to
thaw it with a heated key. Carefully
use the heated key to avoid an injury.Use approved window washer
anti-freeze solution in system
To prevent the window washer from
being frozen, add authorized window
washer anti-freeze solution, as spec-
ified on the window washer contain-
er. Window washer anti-freeze solu-
tion is available from an authorized
HYUNDAI dealer, and most vehicle
accessory outlets. Do not use engine
coolant or other types of anti-freeze
solution, to prevent any damage to
the vehicle paint.

7-7
7
Maintenance
Owner maintenance schedule
When you stop for fuel:
• Check the engine oil level.
• Check the coolant level in the
engine coolant reservoir.
• Check the windshield washer fluid
level.
• Check for low or under-inflated
tires.
While operating your vehicle:
• Note any changes in the sound of
the exhaust or any smell of
exhaust fumes in the vehicle.
• Check for vibrations in the steering
wheel. Notice if there is any
increased steering effort or loose-
ness in the steering wheel, or
change in its straight-ahead posi-
tion.
• Notice if your vehicle constantly
turns slightly or “pulls” to one side
when traveling on smooth, level
road.
• When stopping, listen and check
for unusual sounds, pulling to one
side, increased brake pedal travel
or “hard-to-push” brake pedal.
• If any slipping or changes in the
operation of your transmission
occurs, check the transmission
fluid level.
• Check the dual clutch transmission
P (Park) function.
• Check the parking brake.
• Check for fluid leaks under your
vehicle (water dripping from the air
conditioning system during or after
use is normal).
At least monthly:
• Check coolant level in the engine
coolant reservoir.
• Check the operation of all exterior
lights, including the stoplights, turn
signals and hazard warning flashers.
• Check the inflation pressures of all
tires including the spare for tires
that are worn, show uneven wear,
or are damaged.
• Check for loose wheel lug nuts.
At least twice a year:
(i.e., every Spring and Autumn)
• Check radiator, heater and air condi-
tioning hoses for leaks or damage.
• Check windshield washer spray
and wiper operation. Clean wiper
blades with a clean cloth damp-
ened with washer fluid.
• Check headlamp alignment.
• Check muffler, exhaust pipes,
shields and clamps.
• Check the seat belts for wear and
function. Be careful when checking your
engine coolant/inverter coolant
level when the engine is hot.
This may result in coolant being
blown out of the opening and
cause serious burns and other
injuries.
WARNING

7-11
7
Maintenance
Normal maintenance schedule - For Europe (except Russia)
I : Inspect and if necessary, adjust, correct, clean or replace.
R : Replace or change.
*
6: When adding coolant, use only deionized water or soft water for your vehicle and never mix hard water in the coolant filled at
the factory.
An improper coolant mixture can result in serious malfunction or engine damage.
*
7: For your convenience, it can be replaced prior to it's interval when you do maintenance of other items.
*8: Dual clutch transmission (DCT) fluid should be changed anytime it has been submerged in water.
Number of months or driving distance, whichever comes first
Months1224364860728496
Miles×1,0001020304050607080
Km×1,000153045607590105120
Cooling system
Inspect “Coolant level adjustment and leak” every day
At first, inspect 60,000 km (40,000 miles) or 48 months
after that, inspect every 30,000 km (20,000 miles) or 24 months
Engine coolant / Inverter coolant *6 At first, replace 210,000 km (140,000 miles) or 120 months
after that, replace every 30,000 km (20,000 miles) or 24 months*7
Dual clutch transmission fluid *8II
Engine clutch actuator fluidIRIRIRIR
Engine clutch actuator hose and lineIIIIIIII
Battery condition (12V, Plug-in hybrid vehicle)IIIIIIII
Brake lines, hoses and connectionsIIIIIIII
Brake pedalIIII
Parking brakeIIII
Brake fluidIRIRIRIR
Brake discs and padsIIIIIIII
MAINTENANCE
INTERVALS
MAINTENANCE
ITEM

7-17
7
Maintenance
Normal maintenance schedule - Except Europe (but include Russia)
Number of months or driving distance, whichever comes first
Months1224364860728496
Miles×1,0001020304050607080
Km×1,000153045607590105120
Cooling system
Inspect “Coolant level adjustment and leak” every day
At first, inspect 60,000 km (40,000 miles) or 48 months
after that, inspect every 30,000 km (20,000 miles) or 24 months
Engine coolant / Inverter coolant *7At first, replace 210,000 km (140,000 miles) or 120 months
after that, replace every 30,000 km (20,000 miles) or 24 months*8
Dual clutch transmission fluid *9II
Engine clutch actuator fluidReplace every 40,000 km (26,000 miles) or 24 months
Engine clutch actuator hose and lineIIIIIIII
Battery conditionFor Middle EastInspect every 10,000 km (6,000 miles) or 6 months
Except EuropeIIIIIIII
Brake lines, hoses and connectionsIIIIIIII
Brake pedalIIII
Parking brakeIIII
Brake fluidIRIRIRIR
Brake discs and padsIIIIIIII
MAINTENANCE
INTERVALS
MAINTENANCE
ITEM
I : Inspect and if necessary, adjust, correct, clean or replace. R : Replace or change.
*7: When adding coolant, use only deionized water or soft water for your vehicle and never mix hard water in the coolant filled at
the factory.
An improper coolant mixture can result in serious malfunction or engine damage.
*
8: For your convenience, it can be replaced prior to it's interval when you do maintenance of other items.
*9: Dual clutch transmission (DCT) fluid should be changed anytime it has been submerged in water.

7-21
7
Maintenance
EXPLANATION OF SCHEDULED MAINTENANCE ITEMS
Engine oil and filter
The engine oil and filter should be
changed at the intervals specified in
the maintenance schedule. If the
vehicle is being driven in severe con-
ditions, more frequent oil and filter
changes are required.
HSG (Hybrid starter & genera-
tor) belt
The HSG belt should be changed at
the intervals specified in the mainte-
nance schedule.
Fuel lines, fuel hoses and con-
nections
Check the fuel lines, fuel hoses and
connections for leakage and dam-
age. We recommend an authorized
HYUNDAI dealer replace any dam-
aged or leaking parts immediately.
Fuel filter
A clogged filter can limit the speed at
which the vehicle may be driven,
damage the emission system and
cause multiple issues such as hard
starting. If an excessive amount of
foreign matter accumulates in the
fuel tank, the filter may require
replacement more frequently. After
installing a new filter, run the engine
for several minutes, and check for
leaks at the connections. Fuel filters
should be installed by an authorized
HYUNDAI dealer.
Vapor hose and fuel filler cap
The vapor hose and fuel filler cap
should be inspected at those inter-
vals specified in the maintenance
schedule. Make sure a new vapor
hose or fuel filler cap is correctly
replaced.
Air cleaner filter
A genuine HYUNDAI air cleaner filter
is recommended when the filter is
replaced.
Spark plugs
Make sure to install new spark plugs
of the correct heat range.
Cooling system
Check cooling system components,
such as radiator, coolant reservoir,
hoses and connections for leakage
and damage. Replace any damaged
parts.
Engine coolant/inverter
coolant
The coolant should be changed at
the intervals specified in the mainte-
nance schedule.