2004 Hyundai Terracan Purge valve

EMISSION CONTROL SYSTEMS 7-1
7. EMISSION
CONTROL SYSTEMS
H010A01A-GAT EMISSION CONTROL SYSTEMS (If installed) Your Hyundai is equipped with an emission control system to meet all requirements of the Emission prohibition rules of your province. There are three emission control systems which are as follows. (1) Crankcase emission control system (For a Gasoline Engine)
(2) Evaporative emission control system (For a Gasoline Engine)
(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. H010C02Y-GAT 2. Evaporative Emission Control
System; For a Gasoline Engine
The Evaporative Emission Control System is
designed to prevent fuel vapors from escaping into the atmosphere. Canister While the engine is inoperative, fuel vapors
generated inside the fuel tank are absorbed and stored in the canister. When the engine is
running, the fuel vapors absorbed in the canis- ter are drawn into the induction system through the purge control solenoid valve. Purge Control Solenoid Valve The purge control solenoid valve is controlled
by the ECM; when the engine coolant tempera- ture is low, and during idling, it closes, so that evaporated fuel is not taken into the surge tank.
After engine warm-up, during ordinary driving, it opens so as to introduce evaporated fuel to the surge tank. H020A01A-AAT CATALYTIC CONVERTER ; For a Gasoline Engine
H020A01HP
Catalytic Converter
All Hyundai vehicles are equipped with a mono- lith type three-way catalytic converter to re- duce the carbon monoxide, hydrocarbons and nitrogen oxides contained in the exhaust gas. Exhaust gases passing through the catalytic converter may cause it to operate at a very high temperature. The introduction of large amounts of unburned gasoline into the exhaust may cause the catalytic converter to overheat and create a fire hazard. This risk may be reduced by observing the following:
H010B01A-AAT
1. Crankcase Emission Control System
; For a Gasoline Engine
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, which the fresh air mixes with blow-by gases, which then pass through the PCV valve into the induction system.7
H010D01A-AAT
3. Exhaust Emission Control SystemThe Exhaust Emission Control System is a highly effective system which controls exhaust emissions while maintaining good vehicle performace.

EMISSION CONTROL SYSTEMS 7-1
vehicle may be damaged. You should inspect the exhaust system each time the car is raisedfor lubrication or oil change. To check condition
1. Holes and gas leaks due to corrosion, dam-
age, etc., should be rectified.
2. The joints should be checked for loose con- nections and gas leakage.
3. The hanger rubber and brackets should be checked for damage. DH010B1-E
1. CRANKCASE EMISSION CONTROL
SYSTEM ; For a Petrol Engine
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 air to the crankcase
through the air cleaner. Inside the crankcase,the fresh air mixes with blow-by gases, thenpasses through the PCV valve into the intakesystem.
ZH010C1-E
2. EVAPORATIVE EMISSION CON-
TROL SYSTEM ; For a Petrol Engine
The Evaporative Emission Control System is designed to prevent fuel vapors from escapinginto the atmosphere.
Canister While the engine is inoperative, fuel vaporsgenerated inside the fuel tank are absorbed andstored in the canister. When the engine isrunning, the fuel vapors absorbed in the canis-ter are drawn into the induction system throughthe purge control solenoid valve.
YH000A1-A
7. EMISSION CON-
TROL SYSTEMS
YH020A1-E
EXHAUST GAS WARNING
Exhaust gases contain carbon monoxide, a
potentially toxic gas that is colorless and odor-less. Avoid breathing exhaust gases.
o Do not run the engine in confined areas, such as garages, any longer than neces- sary to move the car in or out.
o Do not drive with the trunk open. An open trunk may draw exhaust gases into the pas-senger compartment. If you must drive withthe trunk open, drive only with all the win-dows wide open and the blower motor onhigh speed.
o If it is necessary to sit in a parked car with the engine running for more than a shortperiod, adjust your heating system to forceoutside air into the car by placing the airselector button of the heater in the FRESHAIR position and mode control in the VENTposition. Set the fan at high speed and thecontrols in any position desired.
Inspect the exhaust system Whenever a change is noticed in the sound of
the exhaust system, the underside or rear of the ZH010A1-E EMISSION CONTROL SYSTEMS (Not all models) Your Hyundai is equipped with an emission control systems. 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 system, it is recommendedthat you have your car inspected and main-tained by an authorized Hyundai dealer in ac-cordance with the schedule in this manual.
7

EMISSION CONTROL SYSTEMS
7-2
Purge Control Solenoid Valve
The purge control solenoid valve is controlled
by the ECU; when the engine coolant tempera- ture is low, and during idling, it closes, so thatevaporated fuel is not taken into the surge tank.After engine warm-up, during ordinary driving, itopens to introduce evaporated fuel to the surgetank. misfire and result in excessive loading of thecatalytic converter.
o Avoid idling the engine for periods longer than 10 minutes.
o Your Hyundai should not be either pushed or pulled to get it started. This can cause thecatalytic converter to overload.
o Take care not to stop your Hyundai over any combustible material such as grass, paper,leaves or rags.
o Do not touch the catalytic converter or any other part of the exhaust system while theengine is running.
o Remember that your Hyundai dealer is your best source of assistance.
JH010D1-E
3. EXHAUST EMISSION CONTROL
SYSTEM
EGR system ; For a Petrol Engine This system helps control oxides of nitrogen byrecirculating a portion of the exhaust gases intothe intake manifold, thereby reducing cylindercombustion temperatures. YH040A2-E
CATALYTIC CONVERTER
; For a Petrol Engine The catalytic converter is part of the exhaust emission control system. Its purpose is to re-move certain engine emission products fromthe engine's exhaust. It looks something like amuffler and is located underneath the car in theexhaust system. YH040B1-E
About the Catalytic Converter ; For a Petrol Engine
Exhaust gases passing through the catalytic converter cause it to operate at very high tem-peratures. As a result, the introduction of largeamounts of unburned petrol may cause it tooverheat and create a fire hazard. This can beavoided by observing the following:
o Use only unleaded fuel.
o Maintain your engine in good condition. Ex- tremely high converter temperatures can re- sult from improper operation of the electri-cal, ignition or M.P.I. system.
o If your engine stalls, pings, knocks, or is hard to start, take your car to your Hyundaidealer as soon as possible and have thedifficulty corrected.
o Avoid driving with a very low fuel level. If you run out of petrol, it could cause the engine to H020D01S-GAT CATALYTIC CONVERTER ; For a Diesel Engine All Hyundai vehicles are equipped with oxida- tion type catalytic converter to reduce the car-bon monoxide, hydrocarbons and particulatecontained in the exhaust gas. H020C01HP-EAT EGR SYSTEM ; For a Diesel Engine This system helps control oxides of nitrogen by recirculating a part of the exhaust gas into theengine, there by reducing cylinder combustiontemperature. The EGR system helps reduce Nox (Oxides of Nitrogen) emission gasses.
Catalytic ConverterH020A01HP