Hyundai Elantra 2018 Repair Manual

2-44
Safety system of your vehicle
12. Emergency Fastening DeviceSystem
13. Occupant classification system
The SRSCM (Supplemental Restraint
System Control Module) continually
monitors all SRS components while the
ignition switch is in the ON position to
determine if a crash impact is severe
enough to require air bag deployment or
pre-tensioner seat belt deployment.
SRS warning light
The SRS (Supplement Restraint System)
air bag warning light on the instrument
panel displays the air bag symbol depict-
ed in the illustration. The system checks
the air bag electrical system for malfunc-
tions. The light indicates that there is a
potential malfunction with your air bag
system, which could include your side
and curtain air bags used for rollover pro-
tection. During a frontal collision, sensors will
detect the vehicle's deceleration. If the
rate of deceleration is high enough, the
control unit will inflate the front air bags.
The front air bags help protect the driver
and front passenger by responding to
frontal impacts in which seat belts alone
cannot provide adequate restraint. When
needed, the side air bags help provide
protection in the event of a side impact or
rollover.
Air bags are activated (able to inflate if
necessary) only when the ignition
switch is in the ON position.
Air bags inflate in the event of certain frontal or side collisions to help protect
the occupants from serious physical
injury.
Generally, air bags are designed to inflate based upon the severity of a col-
lision, its direction, etc. These two fac-
tors determine whether the sensors
produce an electronic deployment/
inflation signal.
If your SRS malfunctions, the air
bag may not inflate properly during
an accident increasing the risk of
serious injury or death.
If any of the following conditions
occur, your SRS is malfunctioning:
The light does not turn on for
approximately six seconds when
the ignition switch is in the ON
position.
The light stays on after illuminat-
ing for approximately six sec-
onds.
The light comes on while the
vehicle is in motion.
The light blinks when the engine
is running.
Have an authorized HYUNDAI deal-
er inspect the SRS as soon as pos-
sible if any of these conditions
occur.
WARNING

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Safety system of your vehicle
2
Air bag deployment depends on anumber of factors including vehicle
speed, angles of impact and the densi-
ty and stiffness of the vehicles or
objects which your vehicle impacts
during a collision. The determining fac-
tors are not limited to those mentioned
above.
The front air bags will completely inflate and deflate in an instant. It is vir-
tually impossible for you to see the air
bags inflate during an accident. It is
much more likely that you will simply
see the deflated air bags hanging out
of their storage compartments after the
collision.
In addition to inflating in certain side collisions, vehicles equipped with a
rollover sensor, side and curtain air
bags will inflate if the sensing system
detects a rollover.
When a rollover is detected, side and
curtain air bags will remain inflated
longer to help provide protection from
ejection, especially when used in con-
junction with the seat belts. To help provide protection, the air bags
must inflate rapidly. The speed of air
bag inflation is a consequence of
extremely short time in which to inflate
the air bag between the occupant and
the vehicle structures before the occu-
pant impacts those structures. This
speed of inflation reduces the risk of
serious or life-threatening injuries and
is thus a necessary part of air bag
design.
However, the rapid air bag inflation can
also cause injuries which can include
facial abrasions, bruises and broken
bones because the inflation speed also
causes the air bags to expand with a
great deal of force.
There are even circumstances under which contact with the air bag can
cause fatal injuries, especially if the
occupant is positioned excessively
close to the air bag.
You can take steps to help reduce the
risk of being injured by an inflating air
bag. The greatest risk is sitting too close
to the air bag. An air bag needs about 10
inches (25 cm) of space to inflate.
NHTSA recommends that drivers allow
at least 10 inches (25 cm) between the
center of the steering wheel and the
chest. To reduce the risk of serious injury
or death from an inflating air bag,
take the following precautions:
NEVER place a child restraint in
the front passenger seat.
Always properly restrain children
under age 13 in the rear seats of
the vehicle.
Adjust the front passenger’s and
driver's seats as far to the rear as
possible while allowing you to
maintain full control of the vehi-
cle.
Hold the steering wheel with
hands at the 9 o'clock and 3
o'clock positions.
Never place anything or anyone
between the air bag and the seat
occupant.
Do not allow the front passenger
to place their feet or legs on the
dashboard.
WARNING

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Safety system of your vehicle
When the SRSCM detects a sufficiently
severe impact to the front of the vehicle,
it will automatically deploy the front air
bags.Upon deployment, tear seams molded
directly into the pad covers will separate
under pressure from the expansion of the
air bags. Further opening of the covers
allows full inflation of the air bags.
A fully inflated air bag, in combination
with a properly worn seat belt, slows the
driver or the front passenger forward
motion, reducing the risk of head and
chest injury.
After complete inflation, the air bag
immediately starts deflating, enabling the
driver to maintain forward visibility and
the ability to steer or operate other con-
trols.
OHM039102N
■Driver’s front air bag (1)
OHM039103N
■Driver’s front air bag (2)
OHM039104N
■Driver’s front air bag (3)
OLMB033057
■Passenger’s front air bag

2-47
Safety system of your vehicle
2
What to Expect After an Air
Bag Inflates
After a frontal or side air bag inflates, it
will deflate very quickly. Air bag inflation
will not prevent the driver from seeing out
of the windshield or being able to steer.
Curtain air bags may remain partially
inflated for some time after they deploy.
Noise and smoke from inflatingair bag
When the air bags inflate, they make a
loud noise and may produce smoke and
powder in the air inside of the vehicle.
This is normal and is a result of the igni-
tion of the air bag inflator. After the air
bag inflates, you may feel substantial dis-
comfort in breathing because of the con-
tact of your chest with both the seat belt
and the air bag, as well as from breathing
the smoke and powder. The powder may
aggravate asthma for some people. If you
experience breathing problems after an
air bag deployment, seek medical atten-
tion immediately.
Though the smoke and powder are non-
toxic, they may cause irritation to the
skin, eyes, nose, throat, etc. If this is the
case, wash and rinse with cold water
immediately and seek medical attention
if the symptoms persist.
To prevent objects from becoming
dangerous projectiles when the
passenger's air bag inflates:
Do not install or place any
objects (drink holder, CD holder,
stickers, etc.) on the front pas-
senger's panel above the glove
box where the passenger's air
bag is located.
Do not install a container of liquid
air freshener near the instrument
cluster or on the instrument
panel surface.
WARNING
After an air bag inflates, take the
following precautions:
Open your windows and doors as
soon as possible after impact to
reduce prolonged exposure to
the smoke and powder released
by the inflating air bag.
Do not touch the air bag storage
area's internal components
immediately after an air bag has
inflated. The parts that come into
contact with an inflating air bag
may be very hot.
Always wash exposed skin areas
thoroughly with cold and mild
soap.
(Continued)
WARNING
(Continued)
Always have an authorized
HYUNDAI dealer replace the air
bag immediately after deploy-
ment. Air bags are designed to be
used only once.

2-48
Safety system of your vehicle
Occupant Classification
System (OCS)
Your vehicle is equipped with an
Occupant Classification System (OCS) in
the front passenger's seat.
Main components of theOccupant Classification System
A detection device located within the
front passenger seat cushion.
Electronic system to determine whether the passenger air bag sys-
tems should be activated or deactivat-
ed.
An indicator light located on the instru- ment panel which illuminates the
words "PASSENGER AIR BAG OFF"
indicating the front passenger air bag
system is deactivated.
The instrument panel air bag indicator light is interconnected with the OCS.
The OCS is designed to detect the pres-
ence of a properly-seated front passen-
ger and determine if the passenger's
front air bag should be enabled (may
inflate) or not.
The purpose is to help reduce the risk of
injury or death from an inflating air bag to
certain front passenger seat occupants,
such as children, by requiring the air bag
to be automatically turned OFF.
For example, if a child restraint of the
type specified in the regulations is on the
seat, the occupant classification sensor
can detect it and cause the air bag to turn
OFF. Front passenger seat adult occupants
who are properly seated and wearing the
seat belt properly, should not cause the
passenger air bag to be automatically
turned OFF. For small adults it may be
turned OFF, however, if the occupant
does not sit in the seat properly (for
example, by not sitting upright, by sitting
on the edge of the seat, or by otherwise
being out of position), this could cause
the sensor to turn the air bag OFF.
You will find the "PASSENGER AIR BAG
OFF" indicator on the center fascia
panel. This system detects the conditions
1-4 in the following table and activates or
deactivates the front passenger air bag
based on these conditions.
OAD035037
OAD035038
■
Type A
■Type B

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Safety system of your vehicle
2
Always be sure that you and all vehicle
occupants are seated properly and wear-
ing the seat belt properly for the most
effective protection by the air bag and the
seat belt.
The OCS may not function properly if the
passenger takes actions which can affect
the classification system. These include:
Failing to sit in an upright position.
Leaning against the door or centerconsole.
Sitting towards the sides of the front of the seat.
Putting their legs on the dashboard or resting them on other locations which
reduce the passenger weight on the
front seat.
Wearing the seat belt improperly.
Reclining the seatback.
Wearing a thick cloth like ski wear or hip protection wear.
Putting an additional thick cushion on the seat.
Putting electrical devices (e.g. note- book, satellite radio) on the seat with
inverter charging.Condition and operation in the front passenger Occupant Classification
System
Condition detected by the
occupant classification system
Indicator/Warning lightDevices
"PASSENGER
AIR BAG OFF" indicator lightSRS
warning lightFront passenger
air bag
1. Adult *1OffOffActivated
2. Infant *2or child restraint
system with 12 months old *3*4 OnOffDeactivated
3. Unoccupied OnOffDeactivated
4. Malfunction in the systemOffOnActivated
*1The system judges a person of adult size as an adult. When a smaller adult sits in the front
passenger seat, the system may recognize him/her as a child depending on his/her physique
and posture.
*
2Do not allow children to ride in the front passenger seat. When a larger child who has out- grown a child restraint system sits in the front passenger seat, the system may recognize
him/her as an adult depending upon his/her physique or sitting position.
*
3Never install a child restraint system on the front passenger seat.
*4The PASSENGER AIR BAG "OFF" indicator may turn on or off when a child above 12 months
to 12 years old (with or without child restraint system) sits in the front passenger seat. This is
a normal condition.

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Safety system of your vehicle
Riding in an improper position or placing weight on the front passenger’s seat when it is unoccupied by a passenger
adversely affects the OCS. To reduce the risk of serious injury or death:
WARNING
OVQ036013NB
OLMB033100
OLMB033101
OLMB033103
OLMB033102
OLMB033104
NEVER put a heavy load in
the front seat or seatback
pocket, or hang any items on
the front passenger seat.
NEVER place your feet on
the front passenger seat-
back.
NEVER sit with your hips
shifted towards the front of
the seat.
NEVER ride with the seat-
back reclined when the vehi-
cle is moving.
NEVER place your feet or
legs on the dashboard.
NEVER lean on the door or
center console or sit on one
side of the front passenger
seat.(Continued)

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Safety system of your vehicle
2
ODH035900K
ODH035901K
ODH035902K
ODH035903K
Do not sit on the passenger
seat wearing heavily padded
clothes such as ski wear and
hip protector.
Do not use car seat acces-
sories such as thick blan-
kets and cushions which
cover up the car seat sur-
face.
Do not place electronic
devices such as laptops,
DVD player, or conductive
materials such as water bot-
tles on the passenger seat.
Do not use electronic
devices such as laptops and
satellite radios which use
inverter chargers.
If large quantity of liquid has
been spilled on the passen-
ger seat, the air bag warning
light may illuminate or mal-
function.
Therefore, make sure the
seat has been completely
dried before driving the vehi-
cle.
Do not place sharp objects on the front passenger seat. These may damage the occupant detection system, if they
puncture the seat cushion.
Do not place any items under the front passenger seat.
When changing or replacing the seat or seat cover, use original items only. The OCS has been developed based on
using original HYUNDAI car seats only. Altering or changing the authentic parts may result in system malfunction
and increase risk of injury when in collision. Any of the above could interfere with the proper operation of the OCS
sensor thereby increasing the risk of an injury in an accident.
(Continued)

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Safety system of your vehicle
Proper seated position for OCS
If the "PASSENGER AIR BAG OFF" indi-
cator is on when an adult is seated in the
front passenger seat, place the ignition
switch in the LOCK/OFF position and
ask the passenger to sit properly (sitting
upright with the seat back in an upright
position, centered on the seat cushion
with their seat belt on, legs comfortably
extended and their feet on the floor).
Restart the engine and have the person
remain in that position. This will allow the
system to detect the person and to
enable the passenger air bag. If the
"PASSENGER AIR BAG OFF" indicator
is still on, ask the passenger to move to
the rear seat.The "PASSENGER AIR BAG OFF"
indicator illuminates for approximate-
ly 4 seconds after the ignition switch
is in the ON position or after the
engine is started. If the front passen-
ger seat is occupied, the OCS will
then classify the front passenger after
several more seconds.
Do Not Install a Child Restraint
in the Front Passenger's Seat
Even though your vehicle is equipped
with the OCS, never install a child
restraint in the front passenger's seat. An
inflating air bag can forcefully strike a
child or child restraint resulting in serious
or fatal injury.
NOTICE
B990A01O
Never allow an adult passenger to
ride in the front passenger seat
when the "PASSENGER AIR BAG
OFF" indicator is illuminated.
During a collision, the air bag will
not inflate if the indicator is illumi-
nated. Have your passenger reposi-
tion himself in the seat. If the "PAS-
SENGER AIR BAG OFF" indicator
remains illuminated after the pas-
senger repositions himself proper-
ly and the vehicle is restarted, have
the passenger move to the rear
seat because the air bag will not
inflate.
WARNING
1JBH3051

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Safety system of your vehicle
2
Why Didn't My Air Bag Go Off
in a Collision?
Air bags are not designed to inflate in
every collision. There are certain types of
accidents in which the air bag would not
be expected to provide additional protec-
tion. These include rear impacts, second
or third collisions in multiple impact acci-
dents, as well as low speed impacts.
Damage to the vehicle indicates a colli-
sion energy absorption, and is not an
indicator of whether or not an air bag
should have inflated.
Air bag collision sensors
NEVER place a rear-facing or
front-facing child restraint in the
front passenger’s seat of the
vehicle.
An inflating frontal air bag could
forcefully strike a child resulting
in serious injury or death.
Always properly restrain children
in an appropriate child restraint
in the rear seat of the vehicle.
WARNING
To reduce the risk of an air bag
deploying unexpectedly and caus-
ing serious injury or death:
Do not hit or allow any objects to
impact the locations where air
bags or sensors are installed.
Do not perform maintenance on
or around the air bag sensors. If
the location or angle of the sen-
sors is altered, the air bags may
deploy when they should not or
may not deploy when they
should.
Do not install bumper guards or
replace the bumper with a non-
genuine HYUNDAI parts. This
may adversely affect the collision
and air bag deployment perform-
ance.
Place the ignition switch in the
LOCK/OFF or ACC position when
the vehicle is being towed to pre-
vent inadvertent air bag deploy-
ment.
Have all air bag repairs conduct-
ed by an authorized HYUNDAI
dealer.
WARNING