coolant temperature Hyundai Elantra 2004 User Guide

7EMISSION CONTROL SYSTEMS
2EMISSION CONTROL SYSTEM
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-AAT
1. 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 fresh 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.
H010A01A-AAT
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 ensure 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.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
induction system 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.
H010C01S-AAT2. 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.)

10INDEX
3
D
Defrosting / Defogging ......................................................................1-87
Door
Locking, unlocking front door with a key ...................................... 1-5
Drink Holder ......................................................................................1-61
Drive Belts.........................................................................................6-20
Driving
Driving for economy .....................................................................2-13
Smooth cornering.........................................................................2-14
Winter driving...............................................................................2-15
E
Emission Control System ................................................................... 7-2
Engine
Before starting the engine .............................................................. 2-3
Compartment................................................................................. 6-2
Coolant........................................................................................... 6-8
Coolant temperature gauge .........................................................1-49
If the engine overheats .................................................................. 3-4
Number........................................................................................... 8-2
Oil ................................................................................................... 6-4
Starting........................................................................................... 2-4
Engine Exhaust Can Be Dangerous .................................................. 2-2
F
Fan Speed Control............................................................................1-84
Floor Mat Anchor ..............................................................................1-71
Fog Light
Front.............................................................................................1-56Front Seats
Adjustable front seats..................................................................1-12
Adjustable headrests...................................................................1-13
Adjusting seat forward and rearward ..........................................1-12
Adjusting seatback angle .............................................................1-13
Fuel
Capacity......................................................................................... 9-2
Gauge...........................................................................................1-48
Recommendations......................................................................... 1-2
Fuel Filler Lid
Remote release............................................................................1-72
Fuses................................................................................................6-21
G
General Checks.................................................................................. 6-3
Glove Box..........................................................................................1-66
H
Hazard Warning System ..................................................................1-59
Heating and Cooling Control.............................................................1-80
Heating and Ventilation
Air flow control..............................................................................1-81
Air intake control ..........................................................................1-83
Bi-level heating.............................................................................1-85
Defrosting / Defogging .................................................................1-87
Fan speed control (Blower control).............................................1-84
Temperature control....................................................................1-84