2000 MITSUBISHI MONTERO Service Repair Manual

ENGINE AND EMISSION CONTROL -Emission Control System <6G7>17-31
EMISSION CONTROL SYSTEM <6G7>
GENERAL INFORMATION
The emission control system consists of the following subsystems:
DCrankcase emission control system
DEvaporative emission control system
DExhaust emission control system
ItemsNameSpecification
Crankcase emission
control systemPositive crankcase ventilation (PCV) valveVariable flow type
(Purpose: HC reduction)
Evaporative emission
control systemCanister
Purge control solenoid valveEquipped
Duty cycle type solenoid valve
(Purpose: HC reduction)
Exhaust emission
control systemAir-fuel ratio control device - GDI systemOxygen sensor feedback type
(Purpose: CO, HC, NOx reduction)
Exhaust gas recirculation system
DEGR valveEquipped
Stepper motor type
(Purpose: NOx reduction)
Catalytic converterMonolith type
(Purpose: CO, HC, NOx reduction)
EMISSION CONTROL DEVICE REFERENCE TABLE
Related partsCrankcase
emission
control
systemEvaporative
emission
control
systemAir/fuel
ratio
control
systemCatalytic
converterExhaust
gas
recirculation
systemReference
page
PCV valve´17-35
Purge control solenoid valve´17-38
GDI system component´´GROUP
13A
Catalytic converter´17-44
EGR valve´17-40


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S
ER VIC E SPEC IF IC ATIO NS
I te m s S
ta ndard va lu e P
urg e co ntr o lso le noid va lv e co il re sis ta nce (a t 20_C )W E
G R va lv e co il re sis ta nce (a t 20_C )W N
um ber N
am e U
se M
B991658 T
e st harn ess se t I
n sp ectio n of E G R va lv e F
ro m fu elp um p(lo w -p re ssu re ) C
anis te r P
urg e co ntr o l
s o le noid va lv e O
xyg en se nso r (fr o nt) T
o fu elta nk
EG R va lv e
( s te pper
m oto r)
P C
ata ly tic co nve rte r F
uelp um p
( h ig h-p re ssu re ) I
n je cto r O
xyg en se nso r (re ar)
w
ww.W ork sh opM an uals .c o .u k
P urc h ased f r o m w ww.W ork sh opM an uals .c o .u k

I
n ta ke m anif o ld T
hro ttle body
Fro m air
c le aner P
urg e co ntr o l
s o le noid va lv e
( O N:O PEN ) C
anis te r P
VA CUUM HO SE CHEC K
1 . Usin g th e pip in g dia gra m as a guid e, ch eck to be su re
t h at th e va cu um hose s are co rre ctly co nnecte d.
2 . Check th e co nnectio n co ndit io n of th e va cu um hose s,
( re m ove d, lo ose , etc .) and ch eck to be su re th at th ere
a re no bends or dam age.
V A CUUM HO SE IN STA LLA TIO N
1 . When co nnectin g th e va cu um hose s, th ey sh ould be
s e cu re ly in se rte d onto th e nip ple s.
2 . Connectth e hose s co rre ctly ,u sin g th e va cu um hose pip in g
d ia gra m as a guid e.
w
ww.W ork sh opM an uals .c o .u k
P urc h ased f r o m w ww.W ork sh opM an uals .c o .u k

C
RANKCASE EM IS SIO N CO NTR O L SYSTE M
G EN ER AL IN FO RM ATIO N
T he cra nkca se em is sio n co ntr o l syste m pre ve nts
b lo w -b y gase s fr o m esca pin g in sid e th e cra nkca se
i n to th e atm osp here .
F re sh air is se nt fr o m th e air cle aner in to th e
c ra nkca se th ro ugh th e bre ath er hose . The air
b eco m es mix e d wit h th e blo w -b y gase s in sid e th e
c ra nkca se .
T he blo w -b y gas in sid e th e cra nkca se is dra w n
i n to th e in ta ke manif o ld th ro ugh th e posit iv e
c ra nkca se ve ntila tio n (P C V) va lv e . T
he PC V va lv e lif ts th e plu nger acco rd in g to th e
i n ta ke manif o ld va cu um so as to re gula te th e flo w
o fb lo w -b y gas pro perly . In oth erw ord s, th e blo w -b y
g as flo w is re gula te d durin g lo w lo ad engin e
o pera tio n to m ain ta in engin e sta bilit y , w hile th e flo w
i s in cre ase d durin g hig h lo ad opera tio n to im pro ve
t h e ve ntila tio n perfo rm ance .
S YSTE M DIA G RAM

P
C V va lv e
w
ww.W ork sh opM an uals .c o .u k
P urc h ased f r o m w ww.W ork sh opM an uals .c o .u k

E
VA PO RATIV E EM IS SIO N CO NTR O L SYSTE M
G EN ER AL IN FO RM ATIO N
T he eva pora tiv e em is sio n co ntr o l syste m pre ve nts
f u el va pours genera te d in th e fu el ta nk fr o m
e sca pin g in to th e atm osp here .
F uel va pours fr o m th e fu el ta nk flo w th ro ugh th e
f u el ta nk pre ssu re co ntr o l va lv e and va pour
p ip e/h ose to be sto re d te m pora rily in th e ca nis te r.
W hen driv in g th e ve hic le , fu el va pours sto re d in
t h e ca nis te r flo w th ro ugh th e purg e so le noid and
p urg e port and go in to th e in ta ke manif o ld to be s
e nt to th e co m bustio n ch am ber.
W hen th e engin e co ola nt te m pera tu re is lo w or
w hen th e in ta ke air quantit y is sm all (w hen th e
e ngin e is at id le , fo r exa m ple ), th e engin e co ntr o l
u nit tu rn s th e purg e so le noid off to sh ut off th e
f u el va pour flo w to th e in ta ke manif o ld .
T his does not only in su re th e driv e abilit y when th e
e ngin e is co ld or ru nnin g under lo w lo ad but als o
s ta biliz e th e em is sio n le ve l.
S YSTE M DIA G RAM E
ngin e-E C U
Engin e co ola ntte m pera tu re se nso r
I n ta ke air te m pera tu re se nso r
B atte ry
C O M PO NEN T LO CATIO N
w
ww.W ork sh opM an uals .c o .u k
P urc h ased f r o m w ww.W ork sh opM an uals .c o .u k

N
orm alco ndit io n A
tid le V
acu um is m ain ta in ed. 3
,0 00 r/m in N
orm alco ndit io n V
acu um is m ain ta in ed. V
acu um will le ak. P
lu g V
acu um hose V
acu um
Engin e sp eed (r/m in )
w
ww.W ork sh opM an uals .c o .u k
P urc h ased f r o m w ww.W ork sh opM an uals .c o .u k

N
orm alco ndit io n A
pplie d V
acu um le aks N
otapplie d V
acu um main ta in ed