check engine HYUNDAI I20 2023 Repair Manual

9-16
Maintenance
The high-pressure cooling system
has a reservoir filled with year-round
antifreeze coolant. The reservoir is filled
at the factory.
Check the antifreeze protection and
coolant concentration level at least once
a year, at the beginning of the winter
season, and before travelling to a colder
climate.
NOTICE

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low engine coolant, suddenly adding
engine coolant may cause cracks
in the engine. To prevent damage,
add engine coolant slowly in small
quantities.

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It may cause water pump failure and
engine seizure, etc.
Checking the coolant level
OBC3090014
„Type A
„Type B
OBC3090061
Check the condition and connections
of all cooling system hoses and
heater hoses. Replace any swollen or
deteriorated hoses.
The coolant level should be filled
between [F (Full)] and [L (Low)] marked
on the side of the coolant reservoir when
the engine is cool.
If the coolant level is low, add enough
distilled (deionized) water.
Bring the level to [F(Full)], but do
not overfill. If frequent additions are
required, we recommend that the
system be inspected by a HYUNDAI
authorised repairer.
ENGINE COOLANT

9-18
Maintenance
WARNING
OBC3090015
1. Check if the radiator cap label is
straight In front.
2. Make sure that the tiny protrusions
inside the radiator cap should be
securely interlocked.
Recommended engine 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
incorrect coolant mixture can result
in serious malfunction or engine
damage.

[The engine in your vehicle has
aluminium 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 specified
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.
For mixture percentage, refer to the
following table.
Ambient
TemperatureMixture Percentage
(volume)
Antifreeze Water
-15°C (5°F)35 65
-25°C (-13°F)40 60
-35°C (-31°F) 50 50
-45°C (-49°F) 60 40
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9-23
09
Checking the washer fluid level
OBC3090017
Check the fluid level in the washer fluid
reservoir and add fluid if necessary.
Plain water may be used if washer fluid
is not available.
However, use washer solvent with
antifreeze characteristics in cold
climates to prevent freezing.
WARNING
To prevent serious injury or death, take
the following safety precautions when
using washer fluid:

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antifreeze in the washer fluid
reservoir. Engine coolant can
severely obscure visibility when
sprayed on the windscreen and may
cause loss of vehicle control resulting
in an accident or damage to paint
and body trim.

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contact the washer fluid or the
washer fluid reservoir. Washer fluid
may contain alcohol and can be
flammable.

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contact with skin. Washer fluid is
poisonous to humans and animals.

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and animals.
Checking the parking brake
OBC3060005
Check the stroke of the parking brake by
counting the number of “clicks’’ heard
whilst fully applying it from the released
position.
Also, the parking brake alone should
securely hold the vehicle on a fairly
steep grade. If the stroke is more or
less than specified, we recommend that
the system be inspected by a HYUNDAI
authorised repairer.
Stroke : 5~7 “clicks’’ at a force of 20 kg
(44 lbs, 196 N).
WASHER FLUID PARKING BRAKE

9-31
09
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OBC3090062
„ Example
❈ The actual battery label in the vehicle
may differ from the illustration.
1. AGM50L-DIN : The HYUNDAI model
name of battery
2. 12V : The nominal voltage
3. 50Ah (20HR) : The nominal capacity
(in Ampere hours)
4. RC 80 : The nominal reserve capacity
(in min.)
5. CCA 560A : Cold-test current in
amperes by SAE/EN
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Your vehicle has a maintenance-free,
calcium-based battery.

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over a short time (for example, the
headlights or interior lights were on
whilst the vehicle was not in use),
recharge it by slow charging (trickle)
for 10 hours.

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because of high electrical load whilst
the vehicle is being used, recharge it
at 20-30A for two hours.
WARNING
When recharging the battery, observe
the following precautions:

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recharging the battery, turn off all
accessories and stop the engine.

[Do not allow cigarettes, sparks, or
flame near the battery.

[Wear eye protection when checking
the battery during charging.

[The battery must be removed from
the vehicle and placed in an area with
good ventilation.

[Watch the battery during charging,
and stop or reduce the charging
rate if the battery cells begin
gassing (boiling) violently or if the
temperature of the electrolyte of any
cell exceeds 49°C (120°F).

[The negative battery cable must be
removed first and installed last when
the battery is disconnected.

[Disconnect the battery charger in the
following order.
1. Turn off the main battery charger
switch.
2. Unhook the negative clamp from
the negative battery terminal.
3. Unhook the positive clamp from
the positive battery terminal.

9-42
Maintenance
OTA070039
„ Blade type
NormalBlown
„ Cartridge type
„ Multi fuse
NormalBlown
NormalBlown
A vehicle’s electrical system is protected
from electrical overload damage by
fuses.
This vehicle has 2 (or 3) fuse panels, one
located in the driver’s side panel bolster,
the other in the engine compartment.
If any of your vehicle’s lights,
accessories, or controls do not work,
check the appropriate circuit fuse. If a
fuse has blown, the element inside the
fuse will be melted or broken.
If the electrical system does not work,
first check the driver’s side fuse panel.
Before replacing a blown fuse, turn the
engine and all switches off, and then
disconnect the negative battery cable.
Always replace a blown fuse with one of
the same rating.
If the replacement fuse blows, this
indicates an electrical problem. Avoid
using the system involved and we
recommend that all inspect a HYUNDAI
authorised repairer.
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WARNING
NEVER replace a fuse with anything but
another fuse of the same rating.

[A higher capacity fuse could cause
damage and possibly cause a fire.

[Do not install a wire or aluminium
foil instead of the proper fuse -
even as a temporary repair. It may
cause extensive wiring damage and
possibly a fire.
NOTICE
Do not use a screwdriver or any other
metal object to remove fuses because
it may cause a short circuit and damage
the system.
FUSES

9-43
09
Instrument panel fuse
replacement
OBC3N091016AU
1. Turn the vehicle off.
2. Turn all other switches OFF.
3. Open the fuse panel cover.
4. Refer to the label on the inside of
the fuse panel cover to locate the
suspected broken fuse location.
OBC3N091018AU
5. Pull the suspected fuse straight out.
Use the removal tool provided in the
engine compartment fuses panel.
6. Check the removed fuse; replace it if
it is blown. Spare fuses are provided in
the instrument panel fuse panels (or in
the engine compartment fuse panel).
7. Push in a new fuse of the same rating,
and make sure it fits tightly in the
clips.If it fits loosely, we recommend
that you consult with a HYUNDAI
authorised repairer.
In an emergency, if you do not have a
spare fuse, use a fuse of the same rating
from a circuit such as the cigarette
lighter fuse.
If the headlights or other electrical
components do not work and the fuses
are undamaged, check the fuse panel
in the engine compartment. If a fuse
is blown, it must be replaced with the
same rating.

9-44
Maintenance
Engine compartment panel fuse
replacement
OBC3N090020
1. Turn the vehicle off.
2. Turn all other switches OFF.
3. Remove the fuse panel cover by
pressing the tab and pulling up.
4. Check the removed fuse; replace it
if it is blown. To remove or insert the
fuse, use the fuse puller in the engine
compartment fuse panel.
5. Push in a new fuse of the same
rating, and make sure it fits tightly
in the clips. If it does not fit tightly,
we recommend that you consult a
HYUNDAI authorised repairer.
NOTICE
After checking the fuse panel in the
engine compartment, securely
install the fuse panel cover. You may
hear a clicking sound if the cover is
securely latched. If it is not securely
latched, electrical failure may occur
from water contact.
Multi fuse (Main fuse)
OBC3N091019AU
If the multi fuse is blown, it must be
removed as follows:
1. Turn the vehicle off.
2. Disconnect the negative battery cable.
3. Remove the fuse panel cover by
pressing the tab and pulling it up.
4. Remove the nuts shown in the picture
above.
5. Replace the fuse with a new one of
the same rating.
6. Reinstall in the reverse order of
removal.
If the multi fuse is blown, we
recommend that you consult with a
HYUNDAI authorised repairer.

9-89
09
3. Exhaust emission control
system
The Exhaust Emission Control System is
a highly effective system which controls
exhaust emissions whilst maintaining
good vehicle performance.
Engine exhaust gas precautions
(carbon monoxide)

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other exhaust fumes. Therefore, if
you smell exhaust fumes of any kind
inside your vehicle, have it inspected
and repaired immediately. If you ever
suspect exhaust fumes are coming
into your vehicle, drive it only with
all the windows fully open. Have
your vehicle checked and repaired
immediately.
WARNING
Engine exhaust gases contain carbon
monoxide (CO). Though colourless and
odourless, it is dangerous and could be
lethal if inhaled. Follow the instructions
following to avoid CO poisoning.

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or closed areas (such as garages) any
more than what is necessary to move
the vehicle in or out of the area.

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open area for more than a short time
with the engine running, adjust the
ventilation system (as needed) to draw
outside air into the vehicle.

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vehicle for any extended time with the
engine running.

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start, excessive attempts to restart
the engine may cause damage to the
emission control system.
Operating precautions for catalytic
converters (if equipped)
WARNING

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flammable items under your vehicle.
Do not park, idle, or drive the vehicle
over or near flammable objects, such
as dry grass, paper, leaves, etc.

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system are very hot whilst the engine
is running or immediately after the
engine is turned off. Keep away from
the exhaust system and catalytic
converter as you may get burned.
Also, do not remove the heat sink
around the exhaust system, do not
seal the bottom of the vehicle and
do not coat the vehicle for corrosion
control. It may present a fire risk
under certain conditions.
Your vehicle is equipped with a catalytic
converter emission control device.
Therefore, the following precautions
must be observed:

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engines.

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there are signs of engine malfunction,
such as misfire or a noticeable loss of
performance.

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Examples of misuse are coasting with
the engine off and descending steep
grades in gear with the engine off.

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speed for extended periods (5 minutes
or more).

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part of the engine or emission control
system. We recommend that all
inspections and adjustments are
made by a HYUNDAI authorised
repairer.

9-90
Maintenance

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level. If you run out of petrol, it could
cause the engine to misfire and result
in excessive loading of the catalytic
converter.
Failure to observe these precautions
could result in damage to the catalytic
converter and to your vehicle.
Additionally, such actions could void
your warranties.
Petrol Particulate Filter (GPF)
(if equipped)
The Petrol Particulate Filter (GPF) system
removes the soot in the exhaust gas.
The GPF system automatically burns
(or oxidizes) the accumulated soot in
accordance with driving situations,
unlike a disposable air filter.
In other words, the accumulated soot is
automatically purged out by the engine
control system and by the high exhaust-
gas temperature at normal/ high driving
speeds.
However, when the vehicle is continually
driven at repeated short distances or
driven at low speed for a long time,
the accumulated soot may not be
automatically removed because of low
exhaust gas temperature. In this case,
the accumulated soot may reach a
certain amount regardless of the soot
oxidization process, then the GPF lamp
will illuminate.
The Petrol Particulate Filter (GPF) Lamp
stops illuminating, when the driving
speed exceeds 80 km/h (50 mph) with
the engine at 1,500- 4,000 rpm and the
gear in the 3rd position or above for
approximately 30 minutes.When the GPF lamp starts to blink or
the waning message “Check exhaust
system” pops up even though the
vehicle was driven as mentioned above,
we recommend that you have the
GPF system checked by a HYUNDAI
authorised repairer.
With the GPF lamp blinking for an
extended period of time, it may damage
the GPF system and lower the fuel
economy.
WARNING
Petrol Fuel
(if equipped with GPF)
We recommend you to use only the
regulated petrol fuels, when your
vehicle is equipped with the GPF
system.
When you use other petrol fuels which
contain unspecified additives, they
may damage the GPF system and cause
exhaust emission problems.