Operation Manual

7
EMISSION CONTROL SYSTEMS
2
EMISSION CONTROL SYSTEM
H010D01A-AAT
3. Exhaust Emission Control
System
The Exhaust Emission Control System is a
highly effective system which controls ex-
haust 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
crankcase. 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 induc-
tion system.
H010A02O-AAT
Your Hyundai is equipped with an emis-
sion control system to meet all require-
ments of the U.S. Environmental Protec-
tion Agency or California 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 recom-
mended that you have your car inspected
and maintained by an authorized Hyundai
dealer in accordance with the maintenance
schedule in this manual.
Caution for the Inspection and Mainte-
nance Test (V6 Vehicle with Traction
Control System)
o To prevent the vehicle from misfiring
during dynamometer testing, discon-
nect the ABS connector in the engine
compartment. (2.7 V6 only)
o For more information, see shop manual
(Wheel Speed Sensor).
o After dynamometer testing is com-
pleted, erase the ABS/TCS DTC
(Diagnotic Trouble Code) with a GST
(Generic Scan Tool) or Hi-Scan Pro.
Canister
Fuel vapors generated inside the fuel tank
are absorbed and stored in the canister.
When the engine is running, the fuel va-
pors 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 con-
trolled by the Engine Control Module
(ECM); when the engine coolant tempera-
ture 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 intro-
duce evaporated fuel to the engine.
H010C01S-AAT
2. Evaporative Emission Control (In-
cluding ORVR: Onboard Refuel-
ing Vapor Recovery) System
The Evaporative Emission Control Sys-
tem 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, preventing the escape of fuel va-
pors into the atmosphere.)