1997 MITSUBISHI TRITON Workshop Manual

A
CCELE R ATO R C ABLE A ND P ED AL 17100120164
R EM OVA L A ND IN STA LLA TIO N <
4G 6>
1
10
1 1
1 2 1
3
1
4
15
1
2 3
45
6
7
8
9 2
3 3
.4 N m
1 5
1
2
1 1 1
2 3

2
2 N m
9
1 4
1 0
1 1

± Emission Control System ENGINE AND
EMISSION CONTROL17-6
EMISSION CONTROL SYSTEM 17300010184
GENERAL INFORMATION
The emission control system consists of the following subsystems:

Crankcase emission control system

Evaporative emission control system

Exhaust 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
ON/OFF type solenoid valve
(Purpose: HC reduction)
Exhaust emission
control systemAir-fuel ratio control device±MPI systemOxygen sensor feedback type
(Purpose: CO, HC, NOx reduction)
Exhaust gas recirculation system

EGR valve

EGR control solenoid valveEquipped
Single type
Duty cycle type solenoid valve
(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
recircula-
tion systemReference
page
PCV valvey17-
Purge control solenoid valvey17-
MPI system componentyyGROUP 13A
Catalytic convertery17-
EGR valvey17-
EGR control solenoid valvey17-

S
ER VIC E S PEC IF IC ATIO NS 17300030173
I te m s S
ta ndard v a lu e P
urg e c o ntr o l s o le noid v a lv e c o il r e sis ta nce ( a t 2 0
C ) W E
G R c o ntr o l s o le noid v a lv e c o il r e sis ta nce ( a t 2 0
C ) W N
um ber N
am e U
se M
D998770 O
xyg en s e nso r
w re nch R
em ova l/ In sta lla tio n o f o xyg en s e nso r

P
osit iv e c ra n kcase v en tila tio n v alv e P
osit iv e c ra nkca se
v e ntila tio n v a lv e

P
urg e c o ntr o l s o le n oid v alv e E
VA PO RATIV E E M IS SIO N C O NTR O L S YSTE M 17300510240
G EN ER AL IN FO RM ATIO N
T he e va pora tiv e e m is sio n c o ntr o l s yste m p re ve nts
f u el v a pours g enera te d in th e fu el ta nk fr o m
e sca pin g in to th e a tm osp here .
F uel v a pours fr o m th e fu el ta nk flo w th ro ugh th e
f u el ta nk p re ssu re c o ntr o l v a lv e a nd v a pour
p ip e/h ose to b e s to re d te m pora rily in th e c a nis te r.
W hen d riv in g th e v e hic le , fu el v a pours s to re d in
t h e c a nis te r flo w th ro ugh th e p urg e s o le noid a nd
p urg e p ort a nd g o in to th e in ta ke m anif o ld to b e s
e nt to th e c o m bustio n c h am ber.
W hen th e e ngin e c o ola nt te m pera tu re is lo w o r
w hen th e in ta ke a ir q uantit y is s m all ( w hen th e
e ngin e is a t id le , fo r e xa m ple ), th e e ngin e c o ntr o l
u nit tu rn s th e p urg e s o le noid o ff to s h ut o ff th e
f u el v a pour flo w to th e in ta ke m anif o ld .
T his d oes n ot o nly in su re th e d riv e abilit y w hen th e
e ngin e is c o ld o r r u nnin g u nder lo w lo ad b ut a ls o
s ta biliz e th e e m is sio n le ve l.
S YSTE M D IA G RAM O
N P
arg e c o ntr o l
s o le noid v a lv e
T
hottle b ody
A ir flo w s e nso r
E ngin e c o ola nt
t e m pera tu re s e nso r
I n ta ke a ir
t e m pera tu re s e nso r
B aro m etr ic p re ssu re
s e nso r A
ir c le aner C
anis te r F
ro m
f u el
t a nk C
ontr o l r e la y B
atte ry
E
ngin e-E C U
C O M PO NEN T L O CATIO N