Mazda 121 - Evaporative Emission Control System Description

F
EVAPORATIVE
E]IIISSION
CONTROL
SYSTEi'
EVAPORATIVE
EM]SSION
CONTROL
SYSTEM
DESCRIPTION
INHIBITOH
SWITCH
(ATX)
THFoTTLE
SENSoF
)\M
\lh-
s!q.t
OXYGEN
SENSOB
WATEF
TH€RMOSE
q_l
rnrrori
sersoa
CANISTEF
@
CHECK
VALVE
FIJEL
VAPOFI
VALVE
The evaporative
emission
control system
consists
of the
fuel vapor
valve' the-ch€ck
valve
(two'way)' the
chircoai
canister,
the solenoid
valva
(purge
control),
the engine
control
unit
(ECU)'
and
the
input devices'
The evaporative
lumes
drawn
into the engine
and burned
is
controlled by
purge
control
solenoid
valve The
ibU a.G"is
fne enqine's
operating
coniitions
by the various
input
devices and
controlsthe
solenoid
valve
operation
by electrical
signals
according
to these
values.
Operation
ilie solenoid
valve
lpurge
control)
is controlled
by
signals from
the ECU
to
periorm
purging
of the
charcoal
canister.
Purging is
done when
these conditions
are
met:
(1)
After
warm-up
(2)
Driving
in
gear
(3)
Accelerator
pedal
depressed
(4)
Oxygen
sensor
functioning
normally
F-l00