2004 Hyundai Sonata maintenance

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.

10- 4 INDEX
K
Key ..................................................................................................... 1-3
If you lose your keys ...................................................................3-11
Positions......................................................................................... 2-3
M
Maintenance Intervals
Explanation of scheduled maintenance items ............................... 5-7
Maintenance under severe usage conditions............................... 5-6
Scheduled maintenance................................................................ 5-4
Service requirements.................................................................... 5-2
Map lamp...........................................................................................1-49
Mirrors
Day-night inside rearview ............................................................1-52
Outside rear view .........................................................................1-50
O
Odometer..........................................................................................1-39
Outside rear view mirror heater .......................................................1-51
P
Parking Brake....................................................................................1-56
Passenger Presense Detection.......................................................1-31
Power Driver seat .............................................................................1-13
Power Outlet......................................................................................1-61
Power Steering Fluid Level ...............................................................6-20R
Radio (H240, H260, H290)........................................... 1-81, 1-86, 1-91
Rear Seat
Fold down.....................................................................................1-15
Rear View mirror ...............................................................................1-52
Rear Window Defroster Switch ........................................................1-44
Reporting Safety Defects ................................................................... 8-7
S
Seat
Front.............................................................................................1-10
Seat Belts
3-Point system.............................................................................1-18
Adjusting your seat belt ...............................................................1-20
Care of seat belts .........................................................................1-17
Precautions..................................................................................1-16
Shop Manual ........................................................................................ 8-5
Spark Plugs ......................................................................................... 6-9
Speedometer.....................................................................................1-38
Starting Procedure.............................................................................. 2-4
Steering Wheel
Free play ......................................................................................6-16
Steering Wheel Tilt Lever ..................................................................1-61
Stereo Radio Operation (H240, H260, H290) .............. 1-81, 1-86, 1-92
Stereo Sound System .......................................................................1-79
Sun Visor...........................................................................................1-60
Sunroof..............................................................................................1-47

Seoul KoreaPrinting: FEB. 20, 2004
Publication No.: A38O-EU42P
Printed in Korea
SERVICE STATION INFORMATION
FUEL:
UNLEADED gasoline only
Pump Octane Rating of 87 (Research Octane Number 91) or higher.
FUEL TANK CAPACITY
US.gal (Imp.gal., liter) 17.2 (14.3, 65)
TIRE PRESSURE:
See the label on the driver's side of the center pillar outer panel.
OTHER TIRE INFORMATION:
See pages 8-2 through 8-6
HOOD RELEASE:
Pull handle under left side of dash.
ENGINE OIL:
API grade SH, SG or SG/CD multigrade and fuel efficient oil. Use SAE
10W-30, 10W-40 or 10W-50 if normal temperatures are above -10°F
(-23°C). For other viscosity recommendations, see page 6-5 or 9-4.
MANUAL TRANSAXLE:
HYUNDAI GENUINE PARTS MTF 75W/90 (API GL-4) Oil level
should be up to filler-bolt hole in housing beside differential.
AUTOMATIC TRANSAXLE:
Apply the parking brake, with the engine running, shift the selector
lever through all ranges and return to “N” (Neutral) position. Then
check the level of fluid on the dipstick. Use only HYUNDAI GENU-
INE ATF available at your dealer or DIAMOND ATF SP-III or SK
ATF SP-III.
QUICK INDEX
o Car will not start ....................................................................... 3-2
o Flat tire ..................................................................................... 3-5
o Warning light/chime comes on .............................................. 1-35
o Engine overheats ...................................................................... 3-3
o Towing of your vehicle ............................................................. 3-9
o Starting the engine ................................................................... 2-3
o Driving tips for first 1,200 miles (2,000 km) .......................... 1-3
o Scheduled maintenance ............................................................ 5-4
o Reporting safety defects ........................................................... 8-7