2021 HYUNDAI ELANTRA brake sensor

03
3-53
OCN7030052
Front air bags are not designed to inflate
in rear collisions, because occupants
are moved backward by the force of the
impact. In this case, inflated air bags
would not provide any additional benefit.
OCN7030049
Front air bags may not inflate in side
impact collisions, because occupants
move in the direction of the collision,
and thus in side impacts, front air bag
deployment would not provide additional
occupant protection.
However, side and curtain air bags may
inflate depending on the severity of
impact.
OCN7030053
In an angled collision, the force of impact
may direct the occupants in a direction
where the air bags would not be able to
provide any additional benefit, and thus
the sensors may not deploy any air bags.
OCN7030054
Just before impact, drivers often brake
heavily. Such heavy braking lowers the
front portion of the vehicle causing it
to “ride” under a vehicle with a higher
ground clearance. Air bags may not
inflate in this “underride” situation
because deceleration forces that are
detected by sensors may be significantly
reduced by such “underride” collisions.

Convenient Features5-68
exterior lights
Lighting control
To operate the lights, turn the knob at
the end of the control lever to one of the
following positions:
ODN8A059200
1. OFF position
2.
AUT
O headlamp position
3.
Parking lamp position
4.
Headlamp position
Daytime running light (DRL)
The Daytime Running Lights (DRL) can
make it easier for others to see the front
of your vehicle during the day, especially
after dawn and before sunset.
The DRL system will turn the dedicated
lamp OFF when:
• The headlamps are ON.
• The parking lamps are ON.
• The vehicle is turned off.
• The parking brake is engaged.
OCN7050055
AUTO headlamp position
The parking lamp and headlamp will
be turned ON or OFF automatically
depending on the amount of daylight as
measured by the ambient light sensor on
the center dash (1).
Even with the AUTO headlamp feature
in operation, it is recommended to
manually turn ON the headlamps when
driving at night or in a fog, driving in the
rain, or when you enter dark areas, such
as tunnels and parking facilities.
NOTICE
• Do not cover or spill anything on
the sensor (1) located in front of the
instrument panel.
• Do not clean the sensor using
a window cleaner, the cleanser
may leave a light film which could
interfere with sensor operation.
• If your vehicle has window tint or
other types of metallic coating on
the front windshield, the AUTO
headlamp system may not work
properly.

6
6. While Driving
Before Driving ........................................................................\
........................6-4Before Entering the Vehicle ........................................................................\
.............6-4
Bef ore Starting ........................................................................\
................................. 6-4
Ignition Switch ........................................................................\
.......................6-5Key Ignition Switch ........................................................................\
.......................... 6-5
Engine S tart/Stop Button ........................................................................\
................ 6-8
Intelligent variable transmission ..................................................................6-12Intelligent variable transmission operation ...........................................................6-12
P arking ........................................................................\
............................................. 6-
17
Good driving practices
........................................................................\
.................... 6-

18
Brake System ........................................................................\
........................6-19Power Brakes ........................................................................\
...................................6-19
Disc Brak es Wear Indicator........................................................................\
.............6-19
Parking brake
........................................................................\
.................................. 6-

20
Electronic Parking Brake (EPB)
........................................................................\
..... 6-22
A

uto Hold
........................................................................\
.....................................
...6-26
Anti-lock Brake System (ABS) ..................................................................... 6-29Electronic Stability Control (ESC) ........................................................................\
.. 6-31
V ehicle Stability Management (VSM) .................................................................. 6-
33
Hill-Start Assist Control (HAC)
........................................................................\
....... 6-

34
Good Braking Practices
........................................................................\
................. 6-

34
ISG (Idle Stop and Go) system..................................................................... 6-35To Activate the ISG System ........................................................................\
............6-35
T o Deactivate the ISG System ........................................................................\
....... 6-37
ISG System Malfunction
........................................................................\
................ 6-

37
Battery Sensor Deactivation
........................................................................\
.......... 6-

38
Drive Mode Integrated Control System ......................................................6-39Drive Mode ........................................................................\
..................................... 6-39
Smart shift on trip comput er ........................................................................\
......... 6-42
Special Driving Conditions ........................................................................\
..6-43Hazardous Driving Conditions ........................................................................\
...... 6-43
Rocking the V ehicle ........................................................................\
....................... 6-43
Smoo
th Cornering
........................................................................\
.......................... 6-44
Driving a

t Night
........................................................................\
.............................. 6-44
Driving in the Rain ........................................................................\
.......................... 6-44
Driving in Flooded Ar

eas
........................................................................\
................ 6-45
High

way Driving
........................................................................\
............................. 6-45

06
6-35
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. (i.e. 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 (i.e. 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, we
recommend that the system be inspected
by an authorized HYUNDAI dealer.
Auto stop
To stop the engine in idle stop mode
1.
Decrease the v

ehicle speed to 0 mph.
2.
Depress the br

ake 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.
Isg (Idle stop and go) s ystem (If e quIpped)

06
6-37
OIK057086N
The auto start is temporarily deactivated
in the following situations.
When the gear is shifted from N (Neutral)
to 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
sensors or the ISG system.
The followings occur, when there is a
malfunction with the ISG system:
• The auto 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.

6-38
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 (i.e. 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 pressur

e 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.
While Driving

Driver assistance system
7-10
• There is a group of pedestrians or a
large crowd in front
• The pedestrian is wearing clothing
that easily blends into the
background, making it difficult to
detect
• The pedestrian is difficult to
distinguish from the similar shaped
structure in the surroundings
• You are driving by a pedestrian,
traffic sign, structure, etc. near the
intersection
• Driving in a parking lot
• Driving through a tollgate,
construction area, unpaved road,
partial paved road, uneven road,
speed bumps, etc.
• Driving on an incline road, curved
road, etc.
• Driving through a roadside with trees
or streetlights
• The adverse road conditions cause
excessive vehicle vibrations while
driving
• Your vehicle height is low or high
due to heavy loads, abnormal tire
pressure, etc.
• Driving through a narrow road where
trees or grass or overgrown
• There is interference by
electromagnetic waves such as
driving in an area with strong radio
waves or electrical noise WARNING
• Driving on a curve
OADAS003OADAS002
Forward Collision-Avoidance Assist
may not detect other vehicles
or pedestrians in front of you on
curved roads adversely affecting the
performance of the sensors. This may
result in no warning or braking assist
when necessary.
When driving on a curve, you must
maintain a safe braking distance,
and if necessary, steer the vehicle
and depress the brake pedal to
reduce your driving speed in order to
maintain a safe distance.

07
7-11
OADAS006OADAS005
Forward Collision-Avoidance Assist
may detect a vehicle or pedestrian
in the next lane or outside the lane
when driving on a curved road.
If this occurs, the system may
unnecessarily warn the driver and
control the brake. Always check the
traffic conditions around the vehicle.•
Driving on a slopeOADAS009
OADAS007
Forward Collision-Avoidance Assist
may not detect other vehicles or
pedestrians in front of you while
driving uphill or downhill adversely
affecting the performance of the
sensors.
This may result in unnecessary
warning or braking assist, or no
warning or braking assist when
necessary.
Also, vehicle speed may rapidly
decrease when a vehicle or
pedestrian ahead is suddenly
detected.
Always have your eyes on the road
while driving uphill or downhill and
if necessary, steer the vehicle and
depress the brake pedal to reduce
your driving speed in order to
maintain a safe distance.