Hyundai Elantra 2004 Service Manual

1FEATURES OF YOUR HYUNDAI
30
!WARNING:If the child restraint seat is not anchored
properly, the risk of a child being seriously
injured or killed in a collision greatly in-
creases.
B180C01E-AATPre-Tensioner Seat Belt
Your Hyundai vehicle is equipped with driver's
and front passenger's pre-tensioner seat belts.
The purpose of the pre-tensioner is to make
sure that the seat belts fit tightly against the
occupant's body in certain frontal collisions.
The pre-tensioner seat belts can be activated
alone or, where the frontal collision is severe
enough, together with the airbags.When the vehicle stops suddenly, or if the
occupant tries to lean forward too quickly, the
seat belt retractor will lock into position. In
certain frontal collisions, the pre-tensioner will
activate and pull the seat belt into tighter contact
against the occupant's body.HXG229
The seat belt pre-tensioner system consists
mainly of the following components. Their loca-
tions are shown in the illustration.
1. SRS airbag warning light
2. Seat belt pre-tensioner assembly
3. SRS control module
B180B01E
Driver's airbag1
2
3Passenger's
airbag

1FEATURES OF YOUR HYUNDAI
31
!
NOTE:o Both the driver's and front passenger's
pre-tensioner seat belts will be activated
in certain frontal collisions. The pre-
tensioner seat belts can be activated
alone or, where the frontal collision is
severe enough, together with the
airbags.
The pre-tensioners will not be activated
if the seat belts are not being worn at the
time of the collision.
o When the pre-tensioner seat belts are
activated, a loud noise may be heard and
fine dust, which may appear to be smoke,
may be visible in the passenger com-
partment. These are normal operating
conditions and are not hazardous.
CAUTION:o The sensor that activates the SRS airbag
is connected with the pre-tensioner seat
belt. The SRS airbag warning light on
the instrument panel will blink for ap-
proximately 6 seconds after the ignition
key has been turned to the "ON" posi-
tion, and then it should turn off.
o If the pre-tensioner seat belt is not work-
ing properly, this warning light will illu-
minate even if there is no malfunction of
the SRS airbag system.
If the SRS airbag warning light does not
illuminate when the ignition key is turned
to "ON", or if it remains illuminated after
blinking for approximately 6 seconds, or
if it illuminates while the vehicle is being
driven, please have an authorized
Hyundai dealer inspect the pre-tensioner
seat belts and SRS airbag system as
soon as possible.
WARNING:o Pre-tensioners are designed to operate
only one time. After activation, pre-
tensioner seat belts must be replaced.
All seat belts, of any type, should always
be replaced after they have been worn
during a collision.
o The pre-tensioner seat belt assembly
mechanisms become hot during activa-
tion. Do not touch the pre-tensioner seat
belt assemblies for several minutes after
they have been activated.
o Do not attempt to inspect or replace the
pre-tensioner seat belts yourself. This
must be done by an authorized Hyundai
dealer.
o Do not strike the pre-tensioner seat belt
assemblies.
o Do not attempt to service or repair the
pre-tensioner seat belt system in any
manner.
o Improper handling of the pre-tensioner
seat belt assemblies, and failure to heed
the warnings to not strike, modify, in-
spect, replace, service or repair the pre-
tensioner seat belt assemblies may lead
to improper operation or inadvertent
activation and serious injury.
o Always wear the seat belts when driving
or riding in a motor vehicle.
!
!WARNING:To obtain maximum benefit from a pre-
tensioner seat belt:
1. The seat belt must be worn correctly.
2. The seat belt must be adjusted to the
correct position.
3. Be sure you and your passengers always
wear seat belts and wear then properly.o Although it is harmless, the fine dust
may cause skin irritation and should not
be breathed for prolonged periods. Wash
your hands and face thoroughly after an
accident in which the pre-tensioner seat
belts were activated.
AIR
BAG

1FEATURES OF YOUR HYUNDAI
32
!
ADVANCED SUPPLEMENTAL
RESTRAINT (AIRBAG) SYSTEM (SRS)
B240A01E-AAT
Your Hyundai is equipped with an Advanced
Supplemental Restraint (Airbag) System. The
indications of the system's presence are the
letters "SRS AIRBAG" embossed on the airbag
pad cover in the steering wheel and the
passenger's side front panel pad above the
glove box.
The Hyundai SRS consists of airbags installed
under the pad covers in the center of the
steering wheel and the passenger's side front
panel above the glove box. The purpose of the
SRS is to provide the vehicle's driver and/or the
front passenger with additional protection thanthat offered by the seat belt system alone, in
case of a frontal impact of sufficient severity.
The advanced SRS uses a collection of sen-
sors to gather information about the driver's and
front passenger's seat position, the driver's and
front passenger's seat belt usage and impact
severity.
The driver's and front passenger's seat position
sensors, which are installed on the seat track,
determine if the seats are fore or aft of a
reference position. Similarly, the seat belt usage
sensors determine if the driver and front
passenger's seat belts are fastened. These
sensors provide the ability to control the SRS
deployment's pressure based on how close the
driver's seat is to the steering wheel, how close
the passenger's seat is to the instrument panel
and whether or not the seat belts are fastened,
and how severe is impact.
The advanced airbags offer the ability to control
the airbag inflation with two pressure levels. A
first stage pressure level is provided for mod-
erate-severity impacts. A second stage pres-
sure level is provided for more severe impacts.
Your Hyundai is equipped with an Occupant
Classification
® system in the front passenger's
seat. The Occupant Classification® system de-
tects the presence of a passenger in the front
passenger's seat and will turn off the front
passenger's airbag under certain conditions.
For more detail, see page 1-37.
B240A01E
Driver's AirbagCAUTION:If the seat position sensor is not working
properly, the SRS airbag warning light on
the instrument panel will illuminate even if
there is no malfunction of the SRS airbag
system because the SRS airbag is con-
nected with the seat position sensor. If the
SRS airbag warning light does not illumi-
nate when the ignition key is turned to the
"ON" position, if it remains illuminated after
blinking for approximately 6 seconds, or if
it illuminates while the vehicle is being
driven, have an authorized Hyundai dealer
inspect the seat position sensor and the
SRS airbag system as soon as possible.
!
WARNING:o Modification to the seat structure can
adversely affect the seat position sensor
and cause the airbag to deploy at a
different pressure level than should be
provided.
o Do not place any objects that may cause
magnetic fields near the front seat. These
can cause a malfunction of the seat
position sensor.
AIR
BAG

1FEATURES OF YOUR HYUNDAI
33
!
!
!WARNING:o Ignoring the SRS indicator light can re-
sult in serious or fatal injury if the airbags,
Occupant Classification
® system or pre-
tensioners do not work properly. Have
your car checked by a dealer as soon as
possible if the SRS warning light alerts
you to a potential problem.
o The SRS is designed to deploy the front
airbags only when an impact is suffi-
ciently severe and when the impact angle
is less than 30° from the forward longi-
tudinal axis of the vehicle and will not
deploy in side, rear or rollover impacts.
Additionally, the airbags will only de-
ploy once. Thus, seat belts must be worn
at all times.
B240C01E
Rear impact
Side Impact
Rollover
NOTE:o Be sure to read information about the
SRS on the labels provided on the back-
side of the sun visor and in the glove box.
o Advanced airbags are combined with
pre-tensioner seat belts to help provide
enhanced occupant protection in fron-
tal crashes. Front airbags are not in-
tended to deploy in light collisions in
which protection can be provided by the
pre-tensioner seat belt.
WARNING:o As its name implies, the SRS is designed
to work with, and be supplemental to,
the driver's and the passenger's three
point seat belt systems and is not a
substitute for them. Therefore, your seat
belts must be worn at all times while the
vehicle is in motion. The airbags deploy
only in certain frontal impact conditions
severe enough to cause significant in-
jury to the vehicle occupants.
o Sitting too close to a front airbag can
result in serious or fatal injury if the front
airbags inflate. Always sit as far back
from airbags as possible.o The driver should sit back as far as
possible while still maintaining control
of the vehicle. If you are sitting too close
to the airbag, it can cause death or seri-
ous injury when it inflates.
WARNING:
o Front airbags are not intended to deploy
in side-impact, rear-impact or rollover
crashes. In addition, airbags will not
deploy in frontal crashes below the de-
ployment threshold.

1FEATURES OF YOUR HYUNDAI
34
!WARNING:
o No objects should be placed over or near
the airbag modules on the steering
wheel, instrument panel, and the front
passenger's panel above the glove box,
because any such object could cause
harm if the vehicle is in a crash severe
enough to cause the airbags to deploy.
o If the airbags deploy, they must be re-
placed by an authorized Hyundai dealer.
o Do not tamper with or disconnect SRS
wiring, or other components of the SRS
system. Doing so could result in injury,
due to accidental deployment of the
airbags or by rendering the SRS inopera-
tive.
o Do not install a child restraint system in
the front passenger seat position. A
child restraint system must never be
placed in the front seat. The infant or
child could be severely injured or killed
by an airbag deployment in case of an
accident.
o Do not allow children to ride in the front
passenger seat. If older children (teen-
agers and older) must ride in the front
seat, make sure they are always properly
belted and the seat is moved back as far
as possible.o For maximum safety protection in all
types of crashes, all occupants includ-
ing the driver should always wear their
seat belts whether or not an airbag is
also provided at their seating position to
minimize the risk of severe injury or
death in the event of a crash. Do not sit
or lean unnecessarily close to the airbag
while the vehicle is in motion.
o Sitting improperly or out of position can
result in serious or fatal injury in a crash.
All occupants should sit upright in their
seats with their feet on the floor until the
vehicle is parked and the ignition key is
removed.
o The SRS airbag system must deploy very
rapidly to provide protection in a crash.
If an occupant is out of position because
of not wearing a seat belt, the airbag may
forcefully contact the occupant causing
serious or fatal injuries.
!WARNING:
B240B01E-AAT
SRS Components and Functions
The SRS consists of the following components:
1. Driver's Airbag Module
2. Passenger's Airbag Module
3. Knee Bolster
4. Pre-tensioner Seat Belt
5. Front Impact Sensor
6. Driver's and Front Passenger's Seat Belt
Usage Sensors
7. Driver's and Front Passenger's Seat Posi-
tion Sensors
8. SRS Service Reminder Indicator (SRI)
9. SRS Control Module (SRSCM)
10.Occupant Classification
® System
(Front passenger's seat only)
11.Passenger Airbag Off Indicator
(Front passenger's seat only)
B240B01E-1
11
12710
79 5
6
4
84

1FEATURES OF YOUR HYUNDAI
35
The SRSCM continually monitors all elements
while the ignition is "ON" to determine if a frontal
or near-frontal impact is severe enough to
require airbag deployment or pre-tensioner seat
belt deployment.
The SRS service reminder indicator (SRI) on
the instrument panel will blink for about 6 sec-
onds after the ignition key is turned to the "ON"
position or after the engine is started, after which
the SRI should go out.
The airbag modules are located both in the
center of the steering wheel and in the front
passenger's panel above the glove box. When
the SRSCM detects a considerable impact to
the front of the vehicle, it will automatically
deploy the front airbags.
B240B01L
B240B02L
Upon deployment, tear seams molded directly
into the pad covers will separate under pres-
sure from the expansion of the airbags. Further
opening of the covers then allows full inflation of
the airbags.A fully inflated airbag, in combination with a
properly worn seat belt, slows the driver's or the
passenger's forward motion, reducing the
risk of head and chest injury.
After complete inflation, the airbag immediately
starts deflating, enabling the driver to maintain
forward visibility.
B240B03L

1FEATURES OF YOUR HYUNDAI
36
!
!WARNING:o When the SRS is activated, there may be
a loud noise and fine dust will be re-
leased throughout the vehicle. These
conditions are normal and are not haz-
ardous. However, the fine dust generat-
ed during airbag deployment may cause
skin irritation. Wash your hands and face
thoroughly with lukewarm water and a
mild soap after an accident in which the
airbags were deployed.
Passenger's Airbag
B240B05L
o The SRS can function only when the
ignition key is in the "ON" position. If the
SRS SRI does not come on, or continu-
ously remains on after flashing for about
6 seconds when the ignition key is turned
to the "ON" position, or after the engine
is started, comes on while driving, the
SRS is not working properly. If this oc-
curs, have your vehicle immediately in-
spected by your Hyundai dealer.
o Before you replace a fuse or disconnect
a battery terminal, turn the ignition key
to the "LOCK" position or remove the
ignition key. Never remove or replace the
air bag related fuse(s) when the ignition
key is in the "ON" position. Failure to
heed this warning will cause the SRS SRI
to illuminate.WARNING:
Passenger's Airbag
CAUTION:When installing a container of liquid air
freshener inside the vehicle, do not place it
near the instrument cluster nor on the in-
strument panel surface. If there is any leak-
age from the air freshener onto these areas
(instrument cluster, instrument panel or air
ventilator), it may damage these parts. If the
liquid from the air freshener does leak onto
these areas, wash them with water immedi-
ately.
!
B240B04E

1FEATURES OF YOUR HYUNDAI
37
!CAUTION:If the Occupant Classification® system is
not working properly, the SRS airbag warn-
ing light on the instrument panel will
illuminate because the SRS airbag is con-
nected with the Occupant Classification
®
system. If there is a malfunction of the
Occupant Classification® system, the "Pas-
senger Airbag Off" indicator will not illumi-
nate and the front passenger's airbag will
deploy in frontal crashes even if there is no
occupant in the front passenger's seat. If
the SRS airbag warning light does not illu-
minate when the ignition key is turned to
"ON" position, if it remains illuminated after
blinking for approximately 6 seconds, or if
it illuminates while the vehicle is being
driven, have an authorized Hyundai dealer
inspect the Occupant Classification sys-
tem with SRS airbag system as soon as
possible.
B990A01E-GAT
OCCUPANT CLASSIFICATION®
SYSTEM
The Occupant Classification® system detects
the presence of a passenger in the front
passenger's seat and will turn off the front
passenger's airbag under certain conditions.
The driver's airbag and the driver's side impact
airbag are not connected with the Occupant
Classification
® system.
The Occupant Classification® system is de-
signed to detect the presence of a properly-
seated occupant and determine if the
passenger's airbag and the passenger's side
impact airbag should be enabled (may inflate) or
not.
HXDFL240-A
If the front passenger seat is unoccupied or
occupied by someone lighter than 56.4 pounds
(25.6 kg), the indicator "PASSENGER AIR BAG
OFF" will be displayed, and the front passenger's
airbag will be turned off and will not deploy in
frontal crashes.
NOTE:o The "Passenger Airbag Off" indicator
illuminates for about 6 seconds after the
ignition key is turned to the "ON" posi-
tion or after the engine is started, and
then turns off in a few seconds.
o If the "Passenger Airbag Off" indicator
illuminates, the passenger's airbag will
not deploy in frontal crashes. If the "Pas-
senger Airbag Off" indicator does not
illuminate, the passenger's airbag will
deploy in frontal crashes.
o If your vehicle is equipped with side
impact airbags, the front passenger's
side impact airbag will not deploy when
the telltale indicator is illuminated.

1FEATURES OF YOUR HYUNDAI
38
B990B04Y-GAT
Side Impact Airbag (If Installed)
Your Hyundai is equipped with a side impact
airbag in each front seat. The purpose of the
airbag is to provide the vehicle's driver and/or
front passenger with additional protection in a
side impact than that offered by the seat belt
alone. The side impact airbags are designed to
deploy only during certain side impact colli-
sions, depending on the crash severity, angle,
speed and point of impact. The side impact
airbags are not designed to deploy in all side
impact situations.
B990B02Y
WARNING:o Even though your vehicle is equipped
with the Occupant Classification® sys-
tem, do not install a child restraint sys-
tem in the front passenger's seat. A child
restraint system must never be placed in
the front seat. Children who are too large
for child restraint systems should al-
ways occupy the rear seat and use the
available lap/shoulder belts. Children are
afforded the most safety in the event of
an accident when they are restrained by
a proper restraint system in the rear seat.
o The Occupant Classification
® system can
function only when the ignition key is in
the "ON" position. If the "Passenger
Airbag Off " indicator is illuminated when
the front passenger's seat is occupied
by an adult who is seated properly, (sit-
ting upright with the seat in an upright
position, centered on the seat cushion,
with the person's legs comfortably ex-
tended), or if the "Passenger Airbag Off"
indicator is not illuminated when the
front passenger's seat is unoccupied or
occupied by someone lighter than 56.4
pounds(25.6 kg), the Occupant Classifi-
cation
® system is not working properly.
If this occurs, have your vehicle immedi-
ately inspected by your Hyundai dealer.
!WARNING:o If luggage or other objects are placed on
the front passenger's seat or if the tem-
perature of the seat changes, the "Passen-
ger Airbag Off" indicator may blink. These
conditions do not indicate a problem.
o If the "Passenger Airbag Off" indicator
blinks continuously when an adult or a
child heavier than 56.4 pounds(25.6 kg)
sits in the front passenger seat and fas-
tens the seat belt normally, have that
person sit in the rear seat. If this occurs,
have the Occupant Classification
® sys-
tem checked by an authorized Hyundai
dealer as soon as possible.
o If you change the weight on the seat, the
"Passenger Airbag Off" indicator may be
turned on or off in a few seconds. This
could result in the malfunction of the
Occupant Classification
® system.
o Do not modify or replace the front pas-
senger seat. Don't place anything on or
attach anything to the front passenger
seat. These can adversely affect the Oc-
cupant Classification
® system.
o Do not sit on sharp objects such as tools
when occupying the front passenger seat.
These can adversely affect the occupant
classification system.
o Do not use accessory seat covers on the
front seats.
!

1FEATURES OF YOUR HYUNDAI
39
B240C01A-AAT
SRS Care
o The SRS is virtually maintenance free and
there are no parts you can safely service by
yourself. The entire SRS system must be
inspected by an authorized Hyundai dealer
10 years after the date that the vehicle was
manufactured.
o Any work on the SRS system, such as
removing, installing, repairing, or any work
on the steering wheel or front seats must be
performed by a qualified Hyundai technician.
Improper handling of the airbag system may
result in serious personal injury.!
o For best protection from the side impact
airbag system and to avoid being injured
by the deploying side impact airbag,
both front seat occupants should sit in
an upright position with their feet on the
floor and the seat belt properly fastened.
The driver's hands should be placed on
the steering wheel at the 9:00 and 3:00
o'clock positions.
The passenger's arms and hands should
be placed on their laps.
o Do not use any accessory seat covers.
o Use of seat covers could reduce or prevent
the effectiveness of the system.
o Do not install any accessories on the side
or near the side impact airbag.
o Do not use excessive force on the side of
the seat.
o Do not place any objects over the airbag or
between the airbag and yourself.
o Do not place any objects (an umbrella,
bag, etc.) between the front door and the
front seat. Such objects may become dan-
gerous projectiles and cause injury if the
supplemental side impact airbag inflates.
o To prevent unexpected deployment of the
side impact air bag that may result in
personal injury, avoid impact to the side
impact airbag sensor when the ignition
key is on.WARNING:
WARNING:o The side impact airbag is supplemental
to the driver's and the passenger's seat
belt systems and is not a substitute for
them. Therefore your seat belts must be
worn at all times while the vehicle is in
motion. The airbags deploy only in cer-
tain side impact conditions severe
enough to cause significant injury to the
vehicle occupants.
!
B990B01E
Side airbag
sensor
HSM393