brake HYUNDAI I20 2021 Manual Online

10-22
Maintenance
Maintenance itemMaintenance
operationMaintenance intervals Driving condition
Engine oil and engine oil filter R Every 5,000 km (3,000 miles) or 6 monthsA, B, C, D, E,
F, G, H, I, J, K, L
Air cleaner filter R Replace more frequently depending on the condition C, E
Manual transmission fluid R Every 120,000 km (80,000 miles)C, D, E, F,
G, H, I, J, K
Steering gear rack, linkage and boots I Inspect more frequently depending on the condition C, D, E, F, G
Front suspension ball joints I Inspect more frequently depending on the condition C, D, E, F, G
Disc brakes and pads, calipers and rotors I Inspect more frequently depending on the condition C, D, E, G, H
Intelligent variable transmission fluid
(if equipped)R Every 100,000 km (60,000 miles)A, C, D, E, F,
G, H, I, K,JMAINTENANCE UNDER SEVERE USAGE CONDITIONS - DIESEL ENGINEThe following items must be serviced more frequently on cars mainly used under severe driving conditions.
Refer to the chart below for the appropriate maintenance intervals.I : Inspect and if necessary, adjust, correct, clean or replace R : Replace or change

10-23
10
Maintenance itemMaintenance
operationMaintenance intervals Driving condition
Parking brake I Inspect more frequently depending on the condition C, D, G, H
Driveshaft and boots I Inspect more frequently depending on the conditionC, D, E, F,
G, H, I, K
Climate control air filter R Replace more frequently depending on the condition C, ESevere driving conditionsA :Repeated short distance driving
B : Extensive idling
C : Driving in dusty, rough roads
D : Driving in areas using salt or other corrosive materials or in very
cold weather
E : Driving in the condition of inflowing sand or dust into engine
F : Driving in heavy traffic areaG : Driving in mountainous areas
H : Using for towing or camping, and driving with loading on the roof
I : Driving for patrol car, taxi, commercial car or vehicle towing
J : Driving in very cold weather
K : Frequently driving under high speed or rapid acceleration
L : Frequently driving in stop-and-go conditions

10-27
10
Brake hoses and lines
Visually check for proper installation,
chafing, cracks, deterioration and any
leakage. Replace any deteriorated or
damaged parts immediately.
Brake/clutch fluid (if equipped)
Check brake/clutch fluid level in the
brake fluid reservoir. The level should
be between “MIN” (Minimum) and
“MAX” (Maximum) marks on the side of
the reservoir. Use only hydraulic brake/
clutch fluid conforming to DOT 3 or 4
specification.
Parking brake
Inspect the parking brake system
including the parking brake lever and
cables.
Rear brake drums and linings
(if equipped)
Check the rear brake drums and linings
for scoring, burning, leaking fluid,
broken parts, and excessive wear.
Brake pads, calipers and discs
Check the pads for excessive wear, discs
for run out and wear, and calipers for
fluid leakage.
Suspension mounting bolts
Check the suspension connections for
looseness or damage. Retighten to the
specified torque.
Steering gear box, linkage &
boots/lower arm ball joint
With the vehicle stopped and engine
off, check for excessive free-play in the
steering wheel.
Check the linkage for bends or damage.
Check the dust boots and ball joints
for deterioration, cracks, or damage.
Replace any damaged parts.
Drive shafts and boots
Check the drive shafts, boots and
clamps for cracks, deterioration, or
damage. Replace any damaged parts
and, if necessary, repack the grease.
Air conditioning refrigerant
(if equipped)
Check the air conditioning lines and
connections for leakage and damage.

10-35
10
Checking the brake/clutch fluid
level
OBC3090016ROBC3090016R
Check the fluid level in the reservoir
periodically. The fluid level should be
between MAX (Maximum) and MIN
(Minimum) marks on the side of the
reservoir.
Before removing the reservoir cap
and adding brake/clutch fluid, clean
the area around the reservoir cap
thoroughly to prevent brake/clutch fluid
contamination. If the level is low, add
fluid to the MAX (Maximum) level. The
level will fall with accumulated mileage.
This is a normal condition associated
with the wear of the brake linings and/or
clutch disc (if equipped).
If the fluid level is excessively low, we
recommend that the system be checked
by an authorized HYUNDAI dealer.
Use only the specified brake/clutch fluid.
(Refer to “Recommended lubricants or
capacities” in chapter 2.)
Never mix different types of fluid.
WARNING
Loss of brake fluid
In the event the brake system
requires frequent additions of fluid,
we recommend that the system be
inspected by an authorized HYUNDAI
dealer.
i Information
Before removing the brake/clutch filter
cap, read the warning on the cap.
WARNING
Clean filler cap before removing. Use
only DOT 4 brake/clutch fluid from a
sealed container.
%5$.(&/87&+

10-36
Maintenance
WARNING
Brake/clutch fluid
When changing and adding brake/
clutch fluid, handle it carefully. Do not
let it come in contact with your eyes.
If brake/clutch fluid come in contact
with your eyes, immediately flush them
with a large quantity of fresh tap water.
Have your eyes examined by a doctor
as soon as possible.
NOTICE
Do not allow brake/clutch fluid to
contact the vehicle’s body paint, as
paint damage will result.
Brake/clutch fluid, which has been
exposed to open air for an extended
time should never be used as its quality
cannot be guaranteed. It should be
properly disposed. Don’t put in the
wrong kind of fluid. A few drops of
mineral-based oil, such as engine oil, in
your brake/clutch system can damage
brake/clutch system parts.

10-39
10
Checking the parking brake
OAI3069006OAI3069006
Check the stroke of the parking brake by
counting the number of “clicks’’ heard
while 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 an authorized
HYUNDAI dealer.
Stroke : 5~7 “clicks’’ at a force of 20 kg
(44 lbs, 196 N).
PARKING BRAKE

10-55
10
CBGQ0706CBGQ0706
„„With a full-size spare tire (if equipped)With a full-size spare tire (if equipped)
„„Without a spare tireWithout a spare tire
CBGQ0707CBGQ0707
„„Directional tires (if equipped)Directional tires (if equipped)
CBGQ0707ACBGQ0707A
Disc brake pads should be inspected for
wear whenever tires are rotated.
i Information
Rotate radial tires that have an
asymmetric tread pattern only from front
to rear and not from right to left.
WARNING
• Do not use the compact spare tire for
tire rotation.
• Do not mix bias ply and radial ply
tires under any circumstances.
This may cause unusual handling
characteristics that could result in
death, severe injury, or property
damage.
Wheel alignment and tire
balance
The wheels on your vehicle were aligned
and balanced carefully at the factory to
give you the longest tire life and best
overall performance.
In most cases, you will not need to have
your wheels aligned again. However,
if you notice unusual tire wear or your
vehicle pulling one way or the other, the
alignment may need to be reset.
If you notice your vehicle vibrating when
driving on a smooth road, your wheels
may need to be rebalanced.
NOTICE
Improper wheel weights can damage
your vehicle’s aluminum wheels. Use
only approved wheel weights.

10-56
Maintenance
Tire replacement
OEN076053OEN076053
Tread wear indicatorTread wear indicator
If the tire is worn evenly, a tread wear
indicator will appear as a solid band
across the tread. This shows there is
less than 1.6 mm (1/16 inch) of tread left
on the tire. Replace the tire when this
happens.
Do not wait for the band to appear
across the entire tread before replacing
the tire.
NOTICE
When replacing the tires, recheck and
tighten the wheel nuts after driving
about 1,000 km (620 miles). If the
steering wheel shakes or the vehicle
vibrates while driving, the tire is out of
balance. Align the tire balance. If the
problem is not solved, we recommend
that you contact an authorized
HYUNDAI dealer.
WARNING
Replacing tires
To reduce the chance or serious or fatal
injuries from an accident caused by tire
failure or loss of vehicle control:
• Replace tires that are worn, show
uneven wear, or are damaged.
Worn tires can cause loss of braking
effectiveness, steering control, and
traction.
• Do not drive your vehicle with too
little or too much pressure in your
tires. This can lead to uneven wear
and tire failure.
• When replacing tires, never mix
radial and bias-ply tires on the
same car. You must replace all tires
(including the spare) if moving from
radial to bias-ply tires.
• It is best to replace all four tires at the
same time. If that is not possible, or
necessary, then replace the two front
or two rear tires as a pair. Replacing
just one tire can seriously affect your
vehicle’s handling.
• Using tires and wheel other than the
recommended sizes could cause
unusual handling characteristics and
poor vehicle control, resulting in a
serious accident.
• Wheels that do not meet HYUNDAI’s
specifications may fit poorly and
result in damage to the vehicle or
unusual handling and poor vehicle
control.
• The works by comparing the speed of
the wheels. Tire size can affect wheel
speed. When replacing tires, all 4
tires must use the same size originally
supplied with the vehicle. Using tires
of a different size can cause the ABS
(Anti-lock Brake System) and ESC
(Electronic Stability Control) to work
irregularly. (if equipped)

10-68
Maintenance
Fuse NameSymbolFuse
ratingCircuit Protected
A/C 37.5A MTC,FATC,ECU
DOOR LOCK
20A DOOR ACTUATOR
MODULE 5
10AAT_LEVER_IND, HLLD, ‘SEAT_EXTN_DRV, ‘AUDIO, AMP,
‘MTC/FATC, ECM_MIRR, ‘WIRELESS CHARGER
ABS 3
10A ABS (ANTI-LOCK BRAKE SYSTEM)
BRAKE
SWITCH
7.5A STOP SWITCH
START1
7.5A START RLY
CLUSTER
10A CLUSTER
MODULE 4
10A C_PAD_SW(ESC SW)
IBU 2
15A IBU (INTEGRATED BODY CONTROL UNIT)
ACC 1
10AAMP, O_S_MIRR_SW, AUDIO/AVN, IBU(BCM), VDMS,
REAR USB, USB_CHARGER
MODULE 7
10A MULTI FUNCTION SWITCH
WASHER
15A M/F (WASHER PWR)
MODULE 6
7.5A IBU
Inner Compartment Fuse Panel (ICU)

10-77
10
We recommend that you consult an
authorized HYUNDAI dealer to replace
most vehicle light bulbs. It is difficult
to replace vehicle light bulbs because
other parts of the vehicle must be
removed before you can get to the bulb.
This is especially true for removing the
headlight assembly to get to the bulb(s).
Removing/installing the headlight
assembly can result in damage to the
vehicle.
WARNING
Prior to replacing a light, depress the
foot brake, move the shift lever into the
N (Neutral, for Automatic transmission
vehicle) or neutral (for manual
transmission vehicle), apply the parking
brake, place the ignition switch in the
LOCK/OFF position, and take the key
with you when leaving the vehicle to
avoid sudden movement of the vehicle
and to prevent possible electric shock.
Be aware the bulbs may be hot and may
burn your fingers.
NOTICE
Be sure to replace the burned-out bulb
with one of the same wattage rating.
Otherwise, it may cause damage to the
fuse or electric wiring system.
i Information
The headlight and tail lamp lenses could
appear frosty if the vehicle is washed after
driving or the vehicle is driven at night
in wet weather. This condition is caused
by temperature difference between the
lamp inside and outside and, it does not
indicate a problem with your vehicle.
When moisture condenses in the lamp,
it will be removed after driving with the
headlight on. The removable level may
differ depending on lamp size, lamp
position and environmental condition.
However, if moisture is not removed, we
recommend that your vehicle is inspected
by an authorized HYUNDAI dealer.
LIGHT BULBS