Mitsubishi Galant 9G. Manual - part 465

EMISSION CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-78

<3.8L ENGINE>

AK301810

EVAPORATIVE EMISSION
VENTILATION SOLENOID

INTAKE MANIFOLD 
PLENUM

EVAPORATIVE EMISSION
PURGE SOLENOID

CHAMBER

EVAPORATIVE
EMISSION
CANISTER

*1

THROTTLE 
BODY

FRONT

B :  BLACK
*1:WHITE PAINT MARK

AB

B

B

B

B

B

EMISSION CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-79

VACUUM CIRCUIT DIAGRAM

M1173007100252

<2.4L ENGINE>

AK301813

B: BLACK
*1:RED PAINT MARK

THROTTLE BODY

INTAKE MANIFOLD

FROM 
AIR CLEANER

TO 
COMBUSTION
CHAMBER

EVAPORATIVE EMISSION 
PURGE SOLENOID
(ON: OPEN)  

EVAPORATIVE EMISSION
VENTILATION SOLENOID 
(ON: CLOSED)  

EVAPORATIVE EMISSION 
CANISTER

AB

FUEL
TANK

B

B

B

B

B

B

B

CHAMBER

CHAMBER

*1

EMISSION CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-80

<3.8L ENGINE>

VACUUM HOSE INSTALLATION

M1173007200129

1. When connecting the vacuum hoses, they should be 

securely inserted onto the nipples.

2. Connect the hoses correctly, using the VACUUM HOSE 

ROUTING diagram as a guide.

AK301814

B: BLACK
*1:WHITE PAINT MARK

THROTTLE BODY

INTAKE MANIFOLD

FROM 
AIR CLEANER

TO 
COMBUSTION
CHAMBER

EVAPORATIVE EMISSION 
PURGE SOLENOID
(ON: OPEN)  

EVAPORATIVE EMISSION
VENTILATION SOLENOID 
(ON: CLOSED)  

EVAPORATIVE EMISSION 
CANISTER

AB

FUEL
TANK

B

B

B

B

B

B

CHAMBER

*1

EMISSION CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-81

VACUUM HOSE CHECK

M1173007300171

1. Using the VACUUM HOSE ROUTING diagram as a guide, 

check that the vacuum hoses are correctly connected.

2. Check the connection of the vacuum hoses, (removed, 

loose, etc.) and confirm that there are no sharp bends or 
damage.

POSITIVE CRANKCASE VENTILATION SYSTEM

GENERAL DESCRIPTION (POSITIVE CRANKCASE VENTILATION SYSTEM)

M1173005000293

The positive crankcase ventilation (PCV) system pre-
vents the escape of blow-by gases from inside the 
crankcase into the atmosphere.
Fresh air is sent from the air cleaner into the crank-
case through the breather hose to be mixed with the 
blow-by gas inside the crankcase.
The blow-by gas inside the crankcase is drawn into 
the intake manifold through the PCV valve.

The PCV valve is designed to lift the plunger accord-
ing 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
<2.4L ENGINE>

AK300553

VENTILATION HOSE

POSITIVE CRANKCASE
VENTILATION VALVE

BREATHER HOSE

AB