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9
9-77
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
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
into the induction system.
2. Evaporative Emission
Control System including
Onboard Refueling Vapor
Recovery (ORVR)
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,
preventing 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.
3. Exhaust Emission Control
System
The Exhaust Emission Control System is a
highly effective system which controls
exhaust emissions while maintaining
good vehicle performance.
When the engine starts or fails to start,
excessive attempts to restart the engine
may cause damage to the emission
system.
Engine exhaust (carbon monoxide)
precautions
• Carbon monoxide can be present with
other exhaust fumes. If you smell
exhaust fumes of any kind in your
vehicle, drive with all the windows fully
open. Have your vehicle checked and
repaired immediately.
WARNING
Engine exhaust gases contain carbon
monoxide (CO). Though colorless and
odorless, it is dangerous and could be
lethal if inhaled. Follow the instructions
on this page to avoid CO poisoning.
WARNING
CALIFORNIA PROPOSITION 65 WARNING
Engine exhaust and a wide variety of
automobile components and parts,
including components found in the
interior furnishings in a vehicle, contain or
emit chemicals known to the State of
California to cause cancer and birth
defects and reproductive harm. In
addition, certain fluids contained in
vehicles and certain products of
component wear contain or emit
chemicals known to the State of
California to cause cancer and birth
defects or other reproductive harm.
JK1_en_US.book Page 77
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