Hyundai Santa Fe (2006 year). Manual — part 279
EVAPORATIVE EMISSION CONTROL SYSTEM
EC -13
PURGE CONTROL SOLENOID
VALVE (PCSV)
INSPECTION
ECF3916E
NOTE
When disconnecting the vacuum hose, make an iden-
tification mark on it so that it can be reconnected to its
original position.
1.
Disconnect the vacuum hose from the solenoid valve.
2.
Detach the harness connector.
3.
Connect a vacuum pump to the nipple which is con-
nected to intake manifold.
4.
Apply vacuum and check when voltage is applied to
the PCSV and when the voltage is discontinued.
Battery voltage
Normal condition
When applied
Vacuum is released
When discontinued
Vacuum is maintained
5.
Measure the resistance between the terminals of the
solenoid valve.
PCSV coil resistance(Ω ) : 14.0 ~ 18.0Ω at 20℃ (68℉)
EC -14
EMISSIONS CONTROL SYSTEM
FUEL TANK AIR FILTER
REPLACE
EDCFC370
1.
Remove the rear left wheel house inner cover (Refer
to "BD" Group in this WORKSHOP MANUAL).
2.
Disconnect the hose (A) connected with the canister
and remove the fuel tank air filter (B) from the filler-
neck assembly (C).
C
A
B
SCMEC6010L
EVAPORATIVE EMISSION CONTROL SYSTEM
EC -15
FUEL FILLER CAP
DESCRIPTION
EDD25DE3
A ratchet tightening device on the threaded fuel filler cap
reduces the chances of incorrect installation, which would
seal the fuel filler. After the gasket on the fuel filler cap
and the filler neck flange contact each other, the ratchet
produces a loud clicking noise indicating the seal has been
set.
Barometric pressure
Fuel vapor pressure
Fuel tank vacuum
When fuel tank is under pressure.
When fuel tank is under vacuum.
LEGE015A
EC -16
EMISSIONS CONTROL SYSTEM
EXHAUST EMISSION
CONTROL SYSTEM
DESCRIPTION
EBA45808
Exhaust emissions (CO, HC, NOx) are controlled by a
combination of engine modifications and the addition of
special control components.
Modifications to the combustion chamber, intake manifold,
camshaft and ignition system form the basic control sys-
tem.
These items have been integrated into a highly effective
system which controls exhaust emissions while maintain-
ing good driveability and fuel economy.
AIR/FUEL MIXTURE CONTROL SYSTEM
[MULTIPORT FUEL INJECTION (MFI) SYSTEM]
The MFI system is a system which uses the signals from
the heated oxygen sensor to activate and control the in-
jector installed in the manifold for each cylinder, thus pre-
cisely regulating the air/fuel mixture ratio and reducing
emissions.
This in turn allows the engine to produce exhaust gases
of the proper composition to permit the use of a three way
catalyst. The three way catalyst is designed to convert the
three pollutants (1) hydrocarbons (HC), (2) carbon monox-
ide (CO), and (3) oxides of nitrogen (NOx) into harmless
substances. There are two operating modes in the MFI
system.
1.
Open Loop air/fuel ratio is controlled by information
programmed into the ECM.
2.
Closed Loop air/fuel ratio is adjusted by the ECM
based on information supplied by the oxygen sensor.
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