engine HYUNDAI ELANTRA 2023 Owners Manual
Page 308 of 572
Driving Your Vehicle6-50
The Idle Stop and Go (ISG) system
automatically and temporarily shuts
down the engine when the vehicle is
stopped and idling to help improve
fuel efficiency and reduce exhaust gas
emissions. (for example, red stop light,
stop sign, and traffic jam).
The engine is automatically started upon
satisfying the starting conditions.
The ISG system is always active, when
the engine is running.
Information
When the engine is automatically started
by the ISG system, some warning lights
(for example, ABS, ESC, ESC OFF, EPS,
and parking brake warning light) may
illuminate for a few seconds due to the
low battery voltage. However, it does
not indicate a malfunction with the ISG
system.
To Activate the ISG System
Prerequisite for activation
The ISG system operates in the following
situations.
[ The driver's seatbelt is fastened
[ The driver's door and hood 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
Information
If the ISG light (white) is turned on on the
instrument cluster and does not meet the
ISG system operating conditions, the ISG
system is not activated.
When the ISG light (yellow) is on
while the ISG system meets operating
conditions, have the vehicle inspected by
an authorized HYUNDAI dealer.
Auto stop
To stop the engine in idle stop mode
1. Decrease the vehicle speed to 0 mph.
2. Depress the brake pedal with the shift
button in D (Drive) or N (Neutral).
The auto stop indicator (
) illuminates
in green on the instrument cluster, when
the engine stops.
Information
The driving speed must reach at least 3
mph (5 km/h) after an idle stop to stop the
engine in idle stop mode again.
In auto stop mode, when the driver
opens the hood, the ISG system will be
deactivated.
, 6 *
Page 309 of 572
06
6-51
When the system is deactivated:
OCN7060021N
The ISG OFF button indicator illuminates.
OCN7060157N
If the message "Auto Stop is Off. Shift
to P or N and start engine manually"
appears on the LCD display with a beep
sound, restart the vehicle manually by
depressing the brake pedal with the
vehicle shifted to P (Park) or N (Neutral).
For your safety, restart the vehicle in the
P (Park) position.
Auto start
To restart the engine in the auto stop
mode
Release the brake pedal.
- When Auto Hold is activated, if you
release the brake pedal, the engine will
be in the auto stop state. However, if
you depress the accelerator pedal, the
engine will start again.
The auto stop indicator () goes to
white on the instrument cluster, when
the engine is restarted.
The engine is automatically restarted in
the following situations.
[ The br
ake vacuum pressure is low
[ The engine has stopped for about 5
minutes
[ The air conditioning is ON with the fan
speed set to the highest position
[ The front defroster is ON
[ The battery is weak
[ The cooling and heating performance
of the climate control system is
unsatisfactory
[ The vehicle is shifted to P (Park) when
Auto Hold is activated
[ The door is opened or the seatbelt
is unfastened when Auto Hold is
activated
[ The EPB switch is pressed when Auto
Hold is activated
The auto stop indicator (
) goes to
white on the instrument cluster, when
the engine is restarted.
Page 310 of 572
Driving Your Vehicle6-52
OIK057086N
The auto start is temporarily deactivated
in the following situations.
When the gear is shifted from N (Neutral)
t
o R (Reverse), D (Drive) or Manual
shift mode without the brake pedal
depressed. A message "Press brake pedal
for Auto Start" will appear on the LCD
display. To activate auto start, depress
the brake pedal.
To Deactivate the ISG System
[ Press the ISG OFF button to
deactivate the ISG system. Then, the
ISG OFF button indicator illuminates.
[ Press the ISG OFF button again to
reactivate the ISG system. Then, the
ISG OFF button indicator turns OFF.
ISG System Malfunction
The ISG system may not operate:
When there is a malfunction with the ISG
sensor
s or the ISG system.
The following occurs, when there is a
malfunction with the ISG system:
[ The aut
o stop indicator () will
illuminate in yellow on the instrument
cluster.
[ The light on the ISG OFF button will
illuminate.
Information
[ When you cannot turn OFF the ISG
OFF button indicator by pressing
the ISG OFF button, or when the
malfunction with the ISG system
persists, contact an authorized
HYUNDAI dealer.
[ You can turn off the ISG OFF button
indicator by driving over 50 mph (80
km/h) for up to 2 hours with the fan
speed below the 2nd position. If the
ISG OFF button indicator remains
ON, contact an authorized HYUNDAI
dealer.
WARNING
When the engine is in auto stop mode,
the engine may restart. Before leaving
the vehicle or checking the engine
compartment, stop the engine placing
the ignition switch to the LOCK/OFF
position or remove the ignition key.
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Battery Sensor Deactivation
OCN7060158N
[A] : Battery sensor
The battery sensor is deactivated, when
the battery is disconnected from the
negative pole for maintenance purpose.
In this case, the ISG system is limitedly
operated due to the battery sensor
deactivation. Thus, the driver needs
to take the following procedures to
reactivate the battery sensor after
disconnecting the battery.
Prerequisites to reactivate the
battery sensor
Switch "ON" and "OFF" the ignition one
time. Park the vehicle for a minimum of 4
hours with the hood and all doors closed.
Pay extreme caution not to connect any
accessories (for example, navigation and
black box) to the vehicle with the engine
in the OFF status. If not, the battery
sensor may not be reactivated.
Information
The ISG system may not operate in the
following situations. - There is a malfunction with the ISG
system.
- The battery is weak.
- The brake vacuum pressure is low.
If this occurs, have the ISG system
checked by an authorized HYUNDAI
dealer.
NOTICE
[ Use only a genuine HYUNDAI
Absorbent Glass Mat (AGM) battery
for replacement. If not, the ISG
system may not operate normally.
[ Do not recharge the Absorbent Glass
Mat (AGM) battery with a general
battery charger. It may damage or
explode the Absorbent Glass Mat
(AGM) battery.
[ Do not remove the battery cap. The
battery electrolyte, which is harmful
to the human body, may leak out.