2020 HYUNDAI IONIQ service

7-10
Maintenance
Maintenance Under Severe Usage Conditions
The following items must be serviced more frequently on cars normally used under severe driving conditions. Refer
to the chart below for the appropriate maintenance intervals.
R : Replace I : Inspect and, after inspection, clean, adjust, repair or replace if necessary
Severe driving conditions
A - Repeatedly driving short distances of less than 5 miles
(8 km) in normal temperature or less than 10 miles (16 km)
in freezing temperature
B - Extensive low speed driving for long distances
C - Driving on rough, dusty, muddy, unpaved, graveled or salt-
spread roads
D - Driving in areas using salt or other corrosive materials or in
very cold weatherE - Driving in sandy areas
F - Driving in heavy traffic area over 90°F (32°C)
G- Driving on uphill, downhill, or mountain road
H - Towing a Trailer, or using a camper, or roof rack
I - Driving as a patrol car, taxi, other commercial use or vehicle
towing
J - Driving over 106 mph (170 km/h)
K - Frequently driving in stop-and-go conditions
MAINTENANCE ITEMMAINTENANCE
OPERATIONMAINTENANCE INTERVALSDRIVING
CONDITION
Reduction gear fluid REvery 75,000 miles (120,000 km) C, E, F, G, I
Brake / pads, calipersIMore frequentlyC, D, G, H
Steering gear box, linkage & boots /
lower arm ball joint, upper arm ball jointIMore frequentlyC, D, E, F, G, H, I
Drive shafts and bootsIMore frequentlyC, D, E, F, G, H, I
Climate control air filter
(for evaporator and blower unit)RMore frequentlyC, E

7-21
7
Maintenance
When you do not use the vehicle
for a long time in a low tempera-
ture area, disconnect the battery
and keep it indoors.
Always charge the battery fully
to prevent battery case damage
in low temperature areas.
For Best Battery Service
Keep the battery securely mount-
ed.
Keep the battery top clean and dry.
Keep the terminals and connec-
tions clean, tight, and coated with
petroleum jelly or terminal grease.
Rinse any spilled acid from the bat-
tery immediately with a solution of
water and baking soda.
Battery Recharging
NOTICE
CALIFORNIA PROPOSITION 65
WARNING
Battery posts, terminals, and
related accessories contain
lead and lead compounds,
chemicals known to the State of
California to cause cancer, birth
defects and reproductive harm.
Batteries also contain other
chemicals known to the State of
California to cause cancer.
Wash hands after handling.
WARNING
Always follow these instruc-
tions when recharging your
vehicle's battery to avoid the
risk of SERIOUS INJURY or
DEATH from explosions or acid
burns:
Before performing mainte-
nance or recharging the bat-
tery, turn off all accessories
and place the POWER button
to the OFF position.
Keep all flames, sparks, or
smoking materials away from
the battery.
Always work outdoors or in an
area with plenty of ventilation.
Wear eye protection when
checking the battery during
charging.
The battery must be removed
from the vehicle and placed in
a well ventilated area.
(Continued)
WARNING
OAEE076007

7-28
Maintenance
Wheel Replacement
When replacing the metal wheels for
any reason, make sure the new
wheels are equivalent to the original
factory units in diameter, rim width
and offset.
Tire Traction
Tire traction can be reduced if you
drive on worn tires, tires that are
improperly inflated or on slippery
road surfaces. Tires should be
replaced when tread wear indicators
appear. To reduce the possibility of
losing control, slow down whenever
there is rain, snow or ice on the road.
Tire Maintenance
In addition to proper inflation, correct
wheel alignment helps to decrease
tire wear. If you find a tire is worn
unevenly, have your dealer check the
wheel alignment.
When you have new tires installed,
make sure they are balanced. This
will increase vehicle ride comfort and
tire life. Additionally, a tire should
always be rebalanced if it is removed
from the wheel.
Tire Sidewall Labeling
This information identifies and
describes the fundamental charac-
teristics of the tire and also provides
the tire identification number (TIN)
for safety standard certification. The
TIN can be used to identify the tire in
case of a recall. (Continued)
Tires degrade over time, even
when they are not being used.
Regardless of the remaining
tread, HYUNDAI recommends
that tires be replaced after six
(6) years of normal service.
When replacing tires (or
wheels), it is recommended to
replace the two front or two
rear tires (or wheels) as a pair.
Replacing just one tire can
seriously affect your vehicle's
handling.
Heat caused by hot climates
or frequent high loading con-
ditions can accelerate the
aging process. Failure to fol-
low this warning may cause
sudden tire failure, which
could lead to a loss of vehicle
control resulting in an acci-
dent.

7-31
7
Maintenance
6. Maximum load rating
This number indicates the maximum
load in kilograms and pounds that
can be carried by the tire. When
replacing the tires on the vehicle,
always use a tire that has the same
load rating as the factory installed
tire.
7. Uniform tire quality grading
Quality grades can be found where
applicable on the tire sidewall
between tread shoulder and maxi-
mum section width.
For example:
TREAD wear 200
TRACTION AA
TEMPERATURE A
Tread wear
The tread wear grade is a compara-
tive rating based on the wear rate of
the tire when tested under controlled
conditions on a specified govern-
ment test course. For example, a tire
graded 150 would wear one-and-a-
half times (1½) as well on the gov-
ernment course as a tire graded 100.
The relative performance of tires
depends upon the actual conditions
of their use, however, and may
depart significantly from the norm
due to variations in driving habits,
service practices and differences in
road characteristics and climate.
These grades are molded on the
sidewalls of passenger vehicle tires.
The tires available as standard or
optional equipment on your vehicle
may vary with respect to grade.
Traction - AA, A, B & C
The traction grades, from highest to
lowest, are AA, A, B and C. Those
grades represent the tire's ability to
stop on wet pavement as measured
under controlled conditions on spec-
ified government test surfaces of
asphalt and concrete. A tire marked
C may have poor traction perform-
ance.
The traction grade assigned to
this tire is based on straight-
ahead braking traction tests,
and does not include accelera-
tion, cornering, hydroplaning,
or peak traction characteristics.
WARNING

Backup lamp
1. Turn off the vehicle.
2. Open the liftgate.
3. Remove the service cover using a
flat-blade screwdriver.4. Remove the socket from the
assembly by turning the socket
counterclockwise until the tabs on
the socket align with the slots on
the assembly.
5. Remove the bulb by pulling it
straight out.
6. Insert a new bulb by inserting it
into the socket and rotating it until
it locks into place.
7. Install the socket into the assem-
bly by aligning the tabs on the
socket with the slots in the assem-
bly. Push the socket into the
assembly and turn the socket
clockwise.
8. Reinstall the service cover.
High Mounted Stop Light
Replacement
1. Open the liftgate.
2. Gently remove the cover of the lift-
gate trim.
3. Remove the spoiler plug hole.
4. Disconnect the electrical connec-
tor.
5. Loosen the mounting bolts and
remove the spoiler.
6. Remove the high mounted stop
light assembly after disconnecting
the connector.
7. Reinstall a new light assembly in
the reverse order of removal.
7-60
Maintenance
OAEPH078040
Backup lamp
OAE079043
OAEE079025

Unlock Charging Door in Emergency ..........................H38
Checking Charging Status ...............................................H39
Charging Status Indicator Lamp for Portable
Charger ................................................................................H40
How to Disconnect Portable Charger
(ICCB: In-Cable Control Box) ..........................................H43
Unlock Charging Connector in Emergency ................H44
Precautions for Portable Charger
(ICCB: In-Cable Control Box) ..........................................H44
EV Charging Troubleshooting
- Steps to Consider ...............................................H45
How to Start the Vehicle ......................................H46
How to Stop the Vehicle.......................................H46
Virtual Engine Sound System ..............................H47
Distance to Empty .................................................H47
When destination is not set ...........................................H48
When destination is set...................................................H48
Tips for Improving Distance to Empty ...............H49
Power/Charge Gauge............................................H49
State of Charge (SOC) Gauge for High Voltage
Battery ...................................................................H49
Warning and Indicator Lights
(related to electric vehicle) .................................H50
Ready Indicator ................................................................H50
Service Warning Light .....................................................H51
This warning light illuminates : ......................................H51
Power Down Warning Light ...........................................H51
Charging Indicator Light..................................................H52
High Voltage Battery Level Warning Light .................H52
Regenerative Brake Warning Light ..............................H52
LCD Display Messages ..........................................H52
Shift to P to charge .........................................................H52
Remaining Time .................................................................H53
Charging Door Open ........................................................H53
Charging Stopped. Check the AC/DC charger ...........H53
Charging Stopped. Check the cable connection .......H54
Check regenerative brakes/
Stop vehicle and check regenerative brakes ............H55
Low Battery........................................................................H55
Charge immediately. Power limited ..............................H55
Low outside temperature may limit power output.
Charge EV battery/Low EV battery temperature.
Power limited .....................................................................H56
Battery Overheated! Stop safety .................................H56
Power limited .....................................................................H57
Stop vehicle and check power supply .........................H57
Check virtual engine sound System .............................H58
Check electric vehicle system .......................................H58
Energy Flow ..........................................................H58
Vehicle Stop........................................................................H59
EV Propulsion ....................................................................H59
Regeneration ......................................................................H59
Aux. Battery Saver+ .............................................H60
Mode ....................................................................................H60
System Setting...................................................................H61
Utility Mode ............................................................H61
System Setting and Activation ......................................H62
System Deactivation .........................................................H62
If an Accident Occurs ...........................................H63
Other Precautions for Electric Vehicle ..............H65
Service Plug ...........................................................H65

H51
Service Warning Light
This warning light illuminates :
When the POWER button is in the
ON position.
- It illuminates for approximately 3
seconds and then goes off.
When there is a problem with relat-
ed parts of the electric vehicle con-
trol system, such as sensors, etc.
When the warning light illuminates
while driving, or does not go OFF
after starting the vehicle, have your
vehicle inspected by an authorized
HYUNDAI dealer.
Power Down Warning
Light
This warning light illuminates :
When the power is limited for the
safety of the electric vehicle.
The power is limited for the following
reasons.
- The high voltage battery level is
below a certain level or voltage is
decreasing
- The temperature of the motor or
high voltage battery is too high or
too low
- There is a problem with the cooling
system, or a failure that may inter-
rupt normal driving Do not accelerate or start the
vehicle suddenly when the
power down warning light is ON.
When the high voltage battery
level is low, the power down
warning illuminates and the
power output from the vehicle is
limited. Charge the battery
immediately since your vehicle
may not drive uphill or skid on a
slope with the warning light ON.
NOTICE

H65
Other Precautions for Electric
Vehicle
When you paint or apply heat treat-
ment to the vehicle as a result of
an accident, the performance of
the high voltage battery can be
reduced.
If heat treatment is required, contact
an authorized HYUNDAI dealer.
When you clean the motor com-
partment, do not use high pressure
water to wash. This may cause an
electric shock due to a discharge in
high voltage electricity, or damage
the vehicle's electric system.
Do not use, remodel, or install non-
genuine parts. This may damage
the electric power system.
Service Plug
If you tow the vehicle while
the front wheels are touching
the ground, the vehicle motor
may generate electricity and
the motor components may
be damaged or a fire may
occur.
When a vehicle fire occurs
due to the battery, there is a
risk of a second fire. Contact
911 when towing the vehicle.
WARNING
OAEE069019
OAEEQ016057
Never touch the service plug in
the luggage compartment. The
service plug is attached to high
voltage battery system.
Touching the service plug will
result in death or serious injury.
Service personnel should fol-
low procedures in service man-
ual.
DANGER