Maintenance
788
Emission control system
crankcase, the fresh air mixes with blow-
by gases, which then pass through the
Positive Crankcase Ventilation (PCV)
valve into the induction system.
2. Evaporative emission control
(including Onboard Refuelling
Vapour Recovery (ORVR)) system
The evaporative emission control system
is designed to prevent fuel vapours from
escaping into the atmosphere. (The
ORVR system is designed to allow the
vapours from the fuel tank to be loaded
into a canister whilst refuelling at the gas
station, preventing the escape of fuel
vapours into the atmosphere.)
Canister
Fuel vapours generated inside the fuel
tank are absorbed and stored in the
onboard canister. When the engine is
running, the fuel vapours 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
(PCSV) is controlled by the Engine Con
-
trol 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 driv
-
ing, the PCSV opens to introduce evapo
-
rated fuel to the engine.
3. Exhaust emission control sys
-
tem
The exhaust emission control system is a
highly effective system which controls
exhaust emissions whilst maintaining
good vehicle performance.
Engine exhaust gas precautions
(carbon monoxide)
僅 Carbon monoxide can be present with
other exhaust fumes. Therefore, if you
smell exhaust fumes of any kind
inside your vehicle, have it inspected
and repaired immediately. If you ever
suspect exhaust fumes are coming
into your vehicle, drive it only with all
the windows fully open. Have your
vehicle checked and repaired immedi
-
ately.
Exhaust
Engine exhaust gases contain carbon
monoxide (CO). Though colourless and
odourless, it is dangerous and could be
lethal if inhaled. Follow the instructions
on this page to avoid CO poisoning.
僅 Do not operate the engine in confined
or closed areas (such as garages) any
more than what is necessary to move
the vehicle in or out of the area.
僅 When the vehicle is stopped in an
open area for more than a short time
with the engine running, adjust the
ventilation system (as needed) to
draw outside air into the vehicle.
僅 Never sit in a parked or stopped vehi
-
cle for any extended time with the
engine running.
僅 When the engine stalls or fails to start,
excessive attempts to restart the
engine may cause damage to the
emission control system.
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