Ventilation MITSUBISHI LANCER 2006 Workshop Manual

17-1
GROUP 17
ENGINE AND
EMISSION
CONTROL
CONTENTS
ENGINE CONTROL . . . . . . . . . .17-2
GENERAL INFORMATION . . . . . .17-2
SERVICE SPECIFICATIONS. . . . .17-2
ON-VEHICLE SERVICE. . . . . . . . .17-2
ACCEL CABLE CHECK AND
ADJUSTMENT . . . . . . . . . . . . . . . . . . . . 17-2
ACCELERATOR CABLE AND
PEDAL . . . . . . . . . . . . . . . . . . . . . .17-3
REMOVAL AND INSTALLATION . . . . . 17-3
EMISSION CONTROL MPI . . . .17-4
GENERAL INFORMATION . . . . . .17-4
EMISSION CONTROL DEVICE
REFERENCE TABLE . . . . . . . . . .17-4
SERVICE SPECIFICATION(S) . . .17-5
VACUUM HOSE. . . . . . . . . . . . . . .17-5
VACUUM HOSE PIPING DIAGRAM . . . 17-5
VACUUM CIRCUIT DIAGRAM . . . . . . . 17-7
VACUUM HOSE CHECK. . . . . . . . . . . . 17-7
VACUUM HOSE INSTALLATION . . . . . 17-8
CRANKCASE EMISSION CONTROL
SYSTEM . . . . . . . . . . . . . . . . . . . . .17-8
GENERAL INFORMATION (CRANKCASE
EMISSION CONTROL SYSTEM) . . . . . 17-8
COMPONENT LOCATI ON (CRANKCASE
EMISSION CONTROL SYSTEM) . . . . . 17-9
POSITIVE CRANKCASE VENTILATION SYSTEM
CHECK . . . . . . . . . . . . . . . . . . . . . . . . . 17-9
POSITIVE CRANKCASE VENTILATION (PCV)
VALVE CHECK . . . . . . . . . . . . . . . . . . . 17-9
EVAPORATIVE EMISSION CONTROL
SYSTEM . . . . . . . . . . . . . . . . . . . . .17-9
GENERAL INFORMATION (EVAPORATIVE
EMISSION CONTROL SYSTEM) . . . . . 17-9
COMPONENT LOCATION (EVAPORATIVE
EMISSION CONTROL SYSTEM) . . . . . 17-10
PURGE CONTROL SYSTEM CHECK . . 17-10
PURGE PORT VACUUM CHECK . . . . . 17-11
PURGE CONTROL SOLENOID VALVE
CHECK . . . . . . . . . . . . . . . . . . . . . . . . . . 17-11
FUEL VAPOUR CANISTER REMOVAL
AND INSTALLATION . . . . . . . . . . . . . . . 17-12
EXHAUST GAS RECIRCULATION
(EGR) SYSTEM . . . . . . . . . . . . . . .17-12
GENERAL INFORMATION
(EGR SYSTEM) . . . . . . . . . . . . . . . . . . . 17-12
COMPONENT LOCATION
(EGR SYSTEM) . . . . . . . . . . . . . . . . . . . 17-14
EGR SYSTEM CHECK . . . . . . . . . . . . . 17-15
EGR VALVE CHECK . . . . . . . . . . . . . . . 17-15
EGR PORT VACUUM CHECK <4G1>. . 17-16
EGR PORT VACUUM CHECK <4G6>. . 17-16
EGR CONTROL SOLENOID VALVE
CHECK <4G1> . . . . . . . . . . . . . . . . . . . . 17-16
EGR CONTROL SOLENOID VALVE
CHECK <4G6> . . . . . . . . . . . . . . . . . . . . 17-17
EXHAUST GAS RECIRCULATION (EGR)
VALVE REMOVAL AND I
NSTALLATION . . . . . . . . . . . . . . . . . . . . 17-18
CATALYTIC CONVERTER . . . . . .17-19
REMOVAL AND INSTALLATION
<4G1, 4G6-M/T> . . . . . . . . . . . . . . . . . . 17-19
REMOVAL AND INSTALLATION
<4G6-A/T> . . . . . . . . . . . . . . . . . . . . . . . 17-19

EMISSION CONTROL
ENGINE AND EMISSION CONTROL17-4
INSTALLATION SERVICE POINT
>>A<< ACCEL PEDAL PAD INSTALLA-
TION
CAUTION
To prevent damages to the accelerator pedal pad,
warm the thumb area of the accelerator pedal
pad with a dryer, etc. prior to assembling it.
NOTE: If it is difficult to assemble, apply soapy water
to the thumb area to enhance the assembling proc
-
ess.
EMISSION CONTROL
GENERAL INFORMATION
M1173000100370
The emission control system consists of the following
subsystems:
•Crankcase emission control system
•Evaporative emission control system
•
ItemsNameSpecification
Crankcase emission control
systemPositive crankcase ventilation
(PCV) valveVariable flow type
(Purpose: HC reduction)
Evaporative emission control
systemCanister
Purge control solenoid valve
Equipped
Duty cycle 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 valve
Equipped
Single type
Duty cycle type solenoid valve
(Purpose: NOx reduction)
Catalytic converterMonolith type
(Purpose: CO, HC, NOx reduction)
Exhaust emission control system
EMISSION CONTROL DEVICE
REFERENCE TABLE
M1173006600135
Related partsCrankcase
emission
control
systemEvaporative
emission
control
systemAir/fuel ratio
control
systemCatalytic
converterExhaust gas
recirculation
system
PCV valve×
Purge control solenoid valve×
MPI system component××
Catalytic converter×
EGR valve×
EGR control solenoid valve×
7.Accelerator control equip bushing
8.Accelerator pedal arm return spring
9.Accelerator pedal arm stopper
10.Accelerator pedal arm bracket
11 .Accelerator pedal arm
>>A<<12.Accelerator pedal pad
13.Accelerator pedal arm stopper
Accelerator pedal assembly
removal steps (Continued)

EMISSION CONTROL
ENGINE AND EMISSION CONTROL17-8
VACUUM HOSE INSTALLATION
M1173007200107
1. When connecting the vacuum hoses, they should
be securely inserted onto the nipples.
2. Connect the hoses correctly, using the vacuum hose piping diagram as a guide.
CRANKCASE EMISSION CONTROL
SYSTEM
GENERAL INFORM ATION (CRANKCASE
EMISSION CONTROL SYSTEM)
M1173005000237
The crankcase emission control system prevents
blow-by gases from escaping inside the crankcase
into the atmosphere.
Fresh air is sent from the air cleaner into the crank-
case through the breather hose.
The air becomes mixed wi th the blow-by gases
inside the crankcase.
The blow-by gas inside the crankcase is drawn into
the intake manifold through the positive crankcase
ventilation (PCV) valve.
The PCV valve lifts the plunger according to the
intake manifold vacuum so as to regulate the flow of
blow-by gas properly.
In other words, the blow-by gas flow is regulated dur-
ing low load engine operation to maintain engine sta-
bility, while the flow is increased during high load
operation to improve the ventilation performance.
SYSTEM DIAGRAM
AK204365
Air cleaner
Air
Ventilation hose Breather hose
PCV valve
AB

EMISSION CONTROL
ENGINE AND EMISSION CONTROL17-9
COMPONENT LOCATION (CRANKCASE
EMISSION CONTROL SYSTEM)
M1173007400208
AK300767
<4G1>
AB
PCV valve
AK204366
<4G6>
AC
PCV valve
POSITIVE CRANKCASE VENTILATION
SYSTEM CHECK
M11 7300 1 1 0017 9
1.Remove the ventilatio n hose from the PCV valve.
2.Remove the PCV valve from t he rocker cove r .
3.Reinst all the PCV valve at the ven t ila tion h o se.
4.S t art the engin e and run at idle .
AKX00336
PCV valve
AD
5.Pla c e a fing er at the open ing o f the PCV va lve
an d ch eck that vacu um o f the int a ke manifold is
fe lt.
NOTE: At this mo men t, the p l unge r in t he PCV
valve mo ves back an d forth.
6.If vacuum is not felt, clean t he PCV valve o r
re place it.
POSITIVE CRANKCASE VENTILA TION
(
P CV) V A L VE CHECK
M1173 0012 0018 7
AK100010
PCV valve
AC
1.In sert a thin rod in to the PCV valve from the side
shown in the illu strat i on (ro cke r cover in st allation
side) , and move the ro d back an d forth to ch eck
th at the plung er mo ves.
2.If the plunger does not move , there is a clo ggin g
in the PCV valve. In th is case, clean o r repla c e
th e PCV valve.
EVAPORA T IVE EMISSION CONTROL
SYSTEM
GENERAL INFORMA T ION (EV A PORA TIVE
EMISSION CONTROL SYSTEM)
M1173 0051 0040 5
The evaporat ive emission contro l syste m pre v ent s
f
uel vapours generat ed in t he fuel t ank from escaping
into t
he atmosp here.
Fuel vapours fro m the fuel t a n k flow throug h the f uel
t
a n k pre ssu re co ntrol valve an d vap our pipe/ho se to
be st
ored te mpora r ily in t he ca nister .
When dr iving the veh i cle, fue l va pours stor ed in the
canister
flow thro ugh th e purge solenoid and purge
port an
d go into the int a ke ma nifold to b e sen t to th e
combust
i on chamber .
When the eng ine co ola n t te mp eratu r e is low o r when
the int
a ke air q uantity is small (wh en the engine is at
idle
, for example), t he eng ine contro l unit turns the
purge sole
noid of f to shu t of f the fue l va pour flow to
the in
t a ke manif o ld.
This does not on ly insure the driveability when t he
engin
e is cold or runn ing und er low load b u t also st a
-
bilize the emissio n level.