Mitsubishi Colt Ralliart. Manual - part 129

EMISSION CONTROL

ENGINE AND EMISSION CONTROL

17-7

<4G1>

AK600530AB

Canister

Purge control 
solenoid valve

Fuel pressure control
solenoid valve

Check valve

Waste gate 
solenoid valve

Waste gate 
actuator

Air 
inlet

Catalytic
converter

Catalytic
converter

Injector

From 
fuel pump

Fuel pressure 
regulator

To 
fuel tank

Oxygen sensor
(front)

Oxygen sensor
(rear)

Main

Index

Group

TOC

EMISSION CONTROL

ENGINE AND EMISSION CONTROL

17-8

VACUUM CIRCUIT DIAGRAM

M1173007100702

<4A9>

AK304617

From 
air 
cleaner

To
combustion
chamber

Throttle body

B

B

Intake manifold

Purge
control 
solenoid
valve

Canister

Vacuum hose colour
B: Black

AB

R mark (stamp)

W mark (stamp)

Main

Index

Group

TOC

EMISSION CONTROL

ENGINE AND EMISSION CONTROL

17-9

<4G1>

AK402415

Vacuum hose colour
B:Black
L:Light blue
R:Red
W:White

Air cleaner

AB

W

B

L

B

B

B

Waste gate
solenoid valve

Waste gate actuator

Canister

Check valve

Purge control
solenoid valve

Air by-pass valve

Fuel pressure regulator

Fuel pressure
control solenoid valve

To
combustion
chamber

From
air
cleaner

Throttle body

Intake manifold

Black

Brown

B

R

B

B

VACUUM HOSE CHECK

M1173007300397

1. Using the piping diagram as a guide, check to be 

sure that the vacuum hoses are correctly 
connected.

2. Check the connection condition of the vacuum 

hoses, (removed, loose, etc.) and check to be 
sure that there are no bends or damage.

VACUUM HOSE INSTALLATION

M1173007200312

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.

Main

Index

Group

TOC

EMISSION CONTROL

ENGINE AND EMISSION CONTROL

17-10

CRANKCASE EMISSION CONTROL 
SYSTEM

GENERAL INFORMATION (CRANKCASE 
EMISSION CONTROL SYSTEM)

M1173005000817

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 with the blow-by gases 
inside the crankcase.
The blow-by gas inside the crankcase is drawn into 
the inlet manifold through the positive crankcase 
ventilation (PCV) valve.
The PCV valve lifts the plunger according to the inlet 
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
<4A9-M/T>

AK600608

PCV valve

AB

Ventilation hose

Breather hose

Air cleaner

Main

Index

Group

TOC