2003 Hyundai Sonata sensor

FEATURES OF YOUR HYUNDAI 1- 27
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.
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.
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.
CAUTION:o Because the sensor that activates the
SRS airbag is connected with pre-
tensioner seat belt, the SRS airbag warn-
ing light on the instrument panel will
blink for approximately 6 seconds after
the ignition key has been turned to the
"ON" position, 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
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 illumi-
nates while the vehicle is being driven,
please have an authorized Hyundai dealer
inspect the pre-tensioner seat belt or
SRS airbag system as soon as possible.
!
AIR
BAG
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.

FEATURES OF YOUR HYUNDAI 1- 31
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B990A04Y-AATPASSENGER PRESENCE DETECTION
The passenger presence detection system
detects the presence of a passenger in the right
front seat. If no passenger is recognized on the
front passenger seat, the deployment of the
front passenger and/or side airbag and seat belt
pretensioner will be prevented.
This system is designed to prevent the replace-
ment of airbag components that deploy need-
lessly in an accident.
NOTE:Luggage or other cargo heavier than 33 lbs
(15 kg) should not be placed on the passen-
ger front seat. This can allow the deploy-
ment of the front passenger and/or side air
bag in the case of an accident.
WARNING:The Passenger Presence Detection system
is not intended to prevent airbag deploy-
ment while a child is in the front passen-
ger's seat. It is intended only as a means to
reduce unnecessary collision damage re-
pair expense by preventing airbag and seat
belt pretensioner deployment when the
right front passenger seat is unoccupied.
Deployment is still possible if only a few
pounds are placed upon the seat. There-
fore, children must not be transported inthe front seat. All children must be seated
in the rear seat and properly restrained with
the vehicle's restraint system or a child
restraint system appropriate for the child's
size and weight.
B990B03Y-AATSide 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
the front passenger with additional protection
than that offered by the seat belt alone. The side
impact airbags are designed to deploy only
during certain side-impact collisions, depend-
ing on the crash severity, angle, speed and point
of impact. The side impact air bags are not
designed to deploy in all side impact situations.
WARNING: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 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 in their laps.
o Do not use any accessory seat covers.
o Use of seat covers could reduce or pre-
vent 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.
B990B02YHTB072
Side airbag
sensor

1- 32 FEATURES OF YOUR HYUNDAI
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B240C01A-AATSRS 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 must be performed by
a qualified Hyundai technician. Improper
handling of the airbag system may result in
serious personal injury.WARNING: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
baby could be severely injured by an
airbag deployment in case of an acci-
dent.
o Modification to SRS components or wir-
ing, including the addition of any kind of
badges to the pad covers or modifica-
tions to the body structure, can ad-
versely affect SRS performance and lead
to possible injury.
o For cleaning the airbag pad covers, use
only a soft, dry cloth or one which has
been moistened with plain water. Sol-
vents or cleaners could adversely affect
the airbag covers and proper deploy-
ment of the system.
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 inflate.
o If the airbags inflate, they must be re-
placed by an authorized Hyundai dealer. 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
dangerous projectiles and cause injury
if the supplemental side impact air bag
inflates.
o To prevent unexpected deployment of
the side impact air bag that may result in
personal injury,avoid impact to the side
airbag sensor when the ignition key is
on.
HSM393

FEATURES OF YOUR HYUNDAI 1- 73
B970C03L-AATAutomatic Operation
The FATC (Full Automatic Temperature Con-
trol) system automatically controls heating and
cooling as follows:
1. Push the "AUTO" switch. The indicator light
will illuminate confirming that the Face, Floor
and/or Bi-Level modes as well as the blower
speed and, air conditioner will be controlled
automatically.2. Push the "TEMP" button to set the desired
temperature.
The temperature will increase to the maxi-
mum 90°F(32°C) by pushing on the button.
Each push of the button will cause the tem-
perature to increase by 1°F(0.5°C).
The temperature will decrease to the mini-
mum 62°F(17°C) by pushing on the button.
Each push of the button will cause the tem-
perature to decrease by 1°F(0.5°C).
NOTE:If the battery has been discharged or dis-
connected, the temperature mode will reset
to centigrade degrees.
This is a normal condition and you can
change the temperature mode from centi-
grade to fahrenheit as follows;
Press the TEMP down ( ) button 3 seconds
or more with the AMB button held down.
The display shows that the unit of tempera-
ture is adjusted to centigrade or fahrenheit
(°C
® ®® ®
® °F or °F
® ®® ®
® °C).
NOTE:Never place anything over the sensor which
is located on the instrument panel to en-
sure better control of the heating and cool-
ing system.
HEF-040HEF-033
HEF-237
Photo Sensor

FEATURES OF YOUR HYUNDAI 1- 77
B980G02Y-GATAuto de-humidified control (If installed)
There is a humidity sensor on the package tray,
In case it is very humid inside the car. The air
conditioning is turned on automatically to control
the humidity.
B760A05Y-AAT
AIR FILTER (FOR EVAPORATOR AND
BLOWER UNIT) (If installed)
The air filter is located in the evaporator behind
the glove box.
It operates to prevent pollutants from entering
the car and to purify the air.
CAUTION:o Replace the filter every 12,000 miles
(20,000 km) or once a year.
If the car is being driven in severe condi-
tions such as dusty, rough roads, more
frequent air filter inspections and
changes are required.
o When the air flow rate is suddenly de-
creased, it must be checked at an autho-
rized dealer.
o If your vehicle is not equipped with this
filter, it can be installed by your dealers.
Check with your dealer for details.
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B740D01Y-AATOperation Tips
o If the interior of the car is hot when you first
get in, open the windows for a few minutes
to expel the hot air.
o When you are using the air conditioning
system, keep all windows closed to keep hot
air out.
o When moving slowly, as in heavy traffic, shift
to a lower gear. This increases engine speed,
which in turn increases the speed of the air
conditioning compressor.
o On steep grades, turn the air conditioning off
to avoid the possibility of the engine over-
heating.
o During winter months or in periods when the
air conditioning is not used regularly, run the
air conditioning once every month for a few
minutes. This will help circulate the lubri-
cants and keep your system in peak oper-
ating condition.
B760A01Y
Inside of a
vehicle
Evaporator coreFilterBlowerOutside air
Inside air

DO-IT-YOURSELF MAINTENANCE 6- 29
G200C03Y-GATJUNCTION BOX DESCRIPTION
Under hood junction box
Note:
Not all junction box description in this manual may be applicable to
your vehicle. It is accurate at the time of printing. When you inspect the
junction box on your vehicle, refer to the junction box label
DESCRIPTION
COND FAN
PWR WIND
ABS 2
IGN SW-1
ABS 1
IGN SW-2
RAD FAN MTR
FUEL PUMP
HD LP LO
ABS
INJECTOR
A/C COMPR
ATM RLY
ECU RLY
IG COIL
O2 SNSR
ECU
HORN
HEAD LP HI
HEAD LP WASH
DRL
FR FOG
HEAD LP LO RH
DIODE-1
SPARE
SPARE
SPARE
SPARE
DIODE-2
BLOWER
PWR FUSE-2
PWR AMP
SUNROOF
TAIL LP
PWR FUSE-1
ECU
RR HTDFUSE RATING
20A
40A
20A
30A
40A
30A
30A
20A
15A
10A
10A
10A
20A
30A
20A
15A
15A
10A
15A
20A
15A
15A
15A
-
30A
20A
15A
10A
-
30A
30A
20A
15A
20A
30A
10A
30APROTECTED COMPONENTS
Condenser fan
Power window
ABS
Ignition switch
ABS
Ignition switch
Radiator fan motor
Fuel pump
Headlights (LO)
ABS
Injector
Air-con compressor
ATM Relay
Engine control unit relay
Ignition coil
Oxygen sensor
Engine control unit
Horn
Headlights (HI)
-
DRL
Front fog lights
Headlight (Low)
Diode 1
Spare fuse
Spare fuse
Spare fuse
Spare fuse
Diode 2
Blower
Power fuse 2
Power amp
Sunroof
Tail lights
Power fuse 1
ECU
Rear window defroster
HEF-165C

7- 2 EMISSION CONTROL SYSTEMS
H010E01Y-AATEGR System (If installed)
This system helps reduce nitrogen oxides by
recirculating a part of the exhaust gas into the
engine, thereby reducing cylinder combustion
temperature, which results in lower output of
oxides of nitrogen.
H010D01A-AAT3. Exhaust Emission Control System
The Exhaust Emission Control System is a
highly effective system which controls exhaust
emissions while maintaining good vehicle
performace.
H010B01A-AAT1. Crankcase Emission Control
System
The positive crankcase ventilation system is
employed to prevent air pollution caused by
blow-by gases being emitted from the crank-
case. This system supplies filtered air to the
crankcase through the air intake hose. Inside
the crankcase, the fresh air mixes with blow-by
gases, which then pass through the PCV valve
and into the induction system.
H010A01L-AATEMISSION CONTROL SYSTEM
Your Hyundai is equipped with an emission
control system to meet all requirements of the
U.S. Environmental Protection Agency or Cali-
fornia Air Resources Board.
There are three emission control systems which
are as follows.
(1) Crankcase emission control system
(2) Evaporative emission control system
(3) Exhaust emission control system
In order to assure the proper function of the
emission control systems, it is recommended
that you have your car inspected and main-
tained by an authorized Hyundai dealer in ac-
cordance with the maintenance schedule in this
manual.
Caution for Inspection and Maintenance
Test (2.7 V6 Vehicle with Traction Control
System)
o To prevent the vehicle from misfiring
during dynamometer testing, discon-
nect the ABS connector located on the
left side of the engine compartment.
o For more information, see shop manual
(BR-67, Wheel Speed Sensor)
H010C02S-AAT
2. Evaporative Emission Control
(Including ORVR: Onboard Refueling
Vapor Recovery) System
The Evaporative Emission Control System is
designed to prevent fuel vapors from escaping
into the atmosphere.
(The ORVR system is designed to allow the
vapors from the fuel tank to be loaded into a
canister while refueling at the gas station, pre-
venting the escape of fuel vapors into the
atmosphere.)
Canister
Fuel vapors generated inside the fuel tank are
absorbed and stored in the onboard canister.
When the engine is running, the fuel vapors
absorbed in the canister are drawn into the
surge tank through the purge control solenoid
valve.
Purge Control Solenoid Valve (PCSV)
The purge control solenoid valve is controlled
by the Engine Control Module (ECM); when the
engine coolant temperature is low during idling,
the PCSV closes so that evaporated fuel is not
taken into the engine. After the engine warms-
up during ordinary driving, the PCSV opens to
introduce evaporated fuel to the engine.