2023 HYUNDAI I20 fuel pressure

6-46
Driving your vehicle
Your vehicle may be equipped with
the ISG system, which reduces fuel
consumption by stopping and restarting
the engine automatically.
The engine starts automatically as soon
as the starting conditions are met.
NOTICE
When the engine automatically starts
by the ISG system, some warning lights
(ABS, ESC, ESC OFF, EPS or Parking
brake warning light) may turn on for a
few seconds. This happens because of
low battery voltage. It does not mean
the system is malfunctioning.
Activating the ISG
Prerequisite for activation
The ISG system operates in the following
situations.

[The driver’s seatbelt is fastened

[The driver’s door and bonnet are
closed

[The brake vacuum pressure is
adequate

[The battery sensor is activated and the
battery is sufficiently charged

[Outside temperature is not too low or
too high

[The vehicle is driven over a constant
speed and stops

[ The climate control system satisfies
the conditions

[The vehicle is sufficiently warmed up

[The incline is gradual

[The steering wheel is turned less than
180 degrees and then the vehicle
stops
Deactivating the ISG
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If you want to deactivate the ISG system,
press the ISG OFF button.
The light on the ISG OFF button will
illuminate.
If you press the ISG OFF button again,
the system will be activated and the light
on the ISG OFF button will turn off.
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8-12
Emergency situations
Tyre pressure monitoring
system
WARNING
Over-inflation or under-inflation can
reduce tyre life, adversely affect
vehicle handling, and lead to sudden
tyre failure that may cause loss of
vehicle control resulting in an accident.
Each tyre, including the spare (if
provided), should be checked monthly
when cold and inflated to the inflation
pressure recommended by the vehicle
manufacturer on the vehicle placard
or tyre inflation pressure label. (If your
vehicle has tyres of a different size
than the size indicated on the vehicle
placard or tyre inflation pressure label,
you should determine the proper tyre
inflation pressure for those tyres.)
As an added safety feature, your
vehicle has been equipped with a tyre
pressure monitoring system (TPMS)
that illuminates a low tyre pressure
telltale when one or more of your
tyres is significantly under-inflated.
Accordingly, when the low tyre pressure
telltale illuminates, you should stop and
check your tyres as soon as possible,
and inflate them to the proper pressure.
Driving on a significantly under-inflated
tyre causes the tyre to overheat and can
lead to tyre failure.
Under-inflation also reduces fuel
efficiency and tyre tread life, and
may affect the vehicle’s handling and
stopping ability.
Please note that the TPMS is not a
substitute for proper tyre maintenance,
and it is the driver’s responsibility to
maintain correct tyre pressure, even if
under-inflation has not reached the level
to trigger illumination of the TPMS low
tyre pressure telltale.
Your vehicle has also been equipped
with a TPMS malfunction indicator
to indicate when the system is
not operating properly. The TPMS
malfunction indicator is combined with
the low tyre pressure telltale. When
the system detects a malfunction, the
telltale will flash for approximately one
minute and then remain continuously
illuminated. This sequence will continue
upon subsequent vehicle start-ups as
long as the malfunction exists.
When the malfunction indicator is
illuminated, the system may not be able
to detect or signal low tyre pressure as
intended. TPMS malfunctions may occur
for a variety of reasons, including the
installation of replacement or alternate
tyres or wheels on the vehicle that
prevent the TPMS from functioning
properly.
Always check the TPMS malfunction
telltale after replacing one or more tyres
or wheels on your vehicle to ensure that
the replacement or alternate tyres and
wheels allow the TPMS to continue to
function properly.
NOTICE
If any of the below happens, we
recommend that you have the system
checked by a HYUNDAI authorised
repairer.
1. The Low Tyre Pressure Telltale/
TPMS Malfunction Indicator does not
illuminate for 3 seconds when the
Engine Start/Stop button is pressed
to the ON position or when the
engine is running.
2. The TPMS Malfunction Indicator
remains illuminated after blinking for
approximately 1 minute.
3. The Low Tyre Pressure Position
Telltale remains illuminated.

9-33
09
WARNING
Tyre failure may cause loss of vehicle
control resulting in an accident. To
reduce risk of SERIOUS INJURY or
DEATH, take the following precautions:

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inflation as well as wear and damage.

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for your vehicle can be found in this
manual and on the tyre label located
on the driver’s side centre pillar.
Always use a tyre pressure gauge to
measure tyre pressure. Tyres with
too much or too little pressure wear
unevenly causing poor handling.

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time you check the pressure of the
other tyres on your vehicle.

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uneven wear, or are damaged. Worn
tyres can cause loss of braking
effectiveness, steering control, or
traction.

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size as each tyre that was originally
supplied with this vehicle. Using
tyres and wheels other than the
recommended sizes could cause
unusual handling characteristics,
poor vehicle control, or negatively
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accident.
Tyre care
For proper maintenance, safety, and
maximum fuel economy, you must
always maintain recommended tyre
inflation pressures and stay within
the load limits and weight distribution
recommended for your vehicle.
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All specifications (sizes and pressures)
can be found on a label attached to the
left side centre pillar.
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9-34
Maintenance
Recommended cold tyre
inflation pressures
All tyre pressures (including the spare)
should be checked when the tyres are
cold. “Cold tyres” means the vehicle has
not been driven for at least three hours
or driven less than one mile (1.6 km).
Warm tyres normally exceed
recommended cold tyre pressures by 28
to 41 kPa (4 to 6 psi). Do not release air
from warm tyres to adjust the pressure
or the tyres will be under-inflated. For
recommended inflation pressure, refer
to “Tyre and Wheels” in chapter 2.
WARNING
Recommended pressures must be
maintained for the best ride, vehicle
handling, and minimum tyre wear.
Over-inflation or under-inflation can
reduce tyre life, adversely affect
vehicle handling, and lead to sudden
tyre failure that could result in loss of
vehicle control resulting in an accident.
Severe under-inflation can lead
to severe heat build-up, causing
blowouts, tread separation and other
tyre failures that can result in the
loss of vehicle control resulting in an
accident. This risk is much higher on
hot days and when driving for long
periods at high speeds.
NOTICE

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excessive wear, poor handling
and reduced fuel economy. Wheel
deformation also is possible. Keep
your tyre pressures at the proper
levels. If a tyre frequently needs
refilling, we recommend that the
system be checked by a HYUNDAI
authorised repairer.

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excessive wear at the centre of the
tyre tread, and a greater possibility of
damage from road hazards.
Check tyre inflation pressure
Check your tyres including the spare tyre
once a month or more.
How to check
Use a good quality tyre pressure gauge
to check tyre pressure. You cannot tell if
your tyres are properly inflated simply by
looking at them. Radial tyres may look
properly inflated even when they are
under-inflated.
Remove the valve cap from the tyre
valve stem. Press the tyre gauge
firmly onto the valve to get a pressure
measurement. If the cold tyre inflation
pressure matches the recommended
pressure on the tyre and loading
information label, no further adjustment
is necessary. If the pressure is low, add
air until you reach the recommended
pressure. Make sure to put the valve
caps back on the valve stems. Without
the valve cap, dirt or moisture could
get into the valve core and cause air
leakage. If a valve cap is missing, install
a new one as soon as possible.