Mazda 121 - Page 165

OUTLINE
F
COMPONENT
DESCRIPTIONS
Component Rems]k
Air bypass solenoid
valve
@
ilj€e1\otj
$oe'i
SLrpplies
bypass air into intake manilold by
openrng
bypass arr
passage
at either
iollow ng
a)
Ensine crankins
b) El€ctric load
c) P/S
pressure
switch ON
d) A,/C switch
ON
e) Bange
change
lN-D)
f) Deceleralionconlrol
.
Electrica load
a) cooling fan
b) Blower molor swltch
c) Headlighl
switch
d)
Rear window
dehosler switch
Air bypass
solenold
valve
@
Supplies bypass air anlo lnlake
manifod by
opening bypass air
passage
al eiiher lollowing
a) Engine
cranking
b) P/S
pressure
swilch ON
c) Dece eralon conlrol
Air bypass solenoid
valve
O
S'rpplies
bypass air inlo nlake manifold
by
opedng bypas arf
passage
with
A/C swltch ON
Filiers air enleing injection
body Oil
p€rmeated
Detects anrounl
of
inlake
air; sends signal to
ECU
Uses Vref
(5v)
as
power
source
Batlle Drrects luel/ai.
mixture into intake manilold
Cat.lytic convener Reduce HC,
CO and NOx by chem cal
Stores luel tank llmes whie
engine stopped
Controls
pressure
ln iuel
tank
Circuit opening retay Vollage for {uel
pump
while
enEne runnrnq
clutch $viich
(MTx)
Delects clutch
condlioni sends signal to ECU Swilch OFF when cl'rlch
pedal
released
Crank angle sensor
Ne.signal
Detects
crank angle at iaoo inlervalsi
sends
signal
to ECU
Diagnosls
conneclor Concentraled
seMce connector Terminals:
1.
EGI self.diagnostc
lerminal
2. EC-AT self-diagnostc
termifal
3. Inilia set
lerminal
4. Fuel
pLrmp
check lerminal
5. Coollng ian
ch€ck terminal
6. Engine rpm
oulput telm nal
2l
pin (located
near
leti strut toweo
Oashpor Prevents
alter burn when throtlle vaive
closes
Ehglne conlrol unil
(ECU)
Conkols operal
on ol the following.
a) Fuel injection
conlrol system
b) Elecironic spafk advance
(ESA)
control
c) AJC cur-oti sysrem
d) Deceleralion
conlrol syslem
e) Fuel
p'rmp
control system
D
Evaporative
emission conlrol syslem
g)
Falsale
conkol system
h)
Secondary air injeclion system
Fuel lllie. Filters panicles
lrom luel
Fuel
pump
Provrdes
lLiel to nleclor
Operates
whale
engine
runn ng
Supply
only evaporative emission into charcoa
can
sler lo
prevent
charcoai canisler from lue
F-9