Mitsubishi Montero Sport (2004+). Manual — part 127

EMISSION CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-103

VACUUM HOSES

VACUUM HOSE ROUTING

M1173000900428

AK301837

EVAPORATIVE
EMISSION PURGE
SOLENOID

EGR VACUUM REGULATOR
SOLENOID VALVE

THROTTLE BODY

FUEL PRESSURE
REGULATOR

FRONT

AB

EGR VALVE

VACUUM CONTROL
VALVE

EVAPORATIVE EMISSION
VENTILATION SOLENOID

FUEL TANK

EVAPORATIVE
EMISSION
CANISTER

INTAKE MANIFOLD
PLENUM

B: BLACK
G: GREEN
L: LIGHT BLUE
W: WHITE
Y: YELLOW
*1: RED PAINT MARK
*2: RESTRICTOR

*2

*1

B

B

B

Y

G

L

B

B

W

EMISSION CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-104

VACUUM CIRCUIT DIAGRAM

M1173007100274

AK301840

THROTTLE BODY

INTAKE MANIFOLD

FROM
AIR CLEANER

TO
COMBUSTION
CHAMBER

AB

FUEL PRESSURE
REGULATOR

B : BLACK
G: GREEN
L : LIGHT BLUE

W: WHITE

Y : YELLOW

*1: RED PAINT MARK
*2: RESTRICTOR

L

G

B

B

B

EGR VACUUM REGULATOR
SOLENOID VALVE
(ON: CLOSED)

VACUUM
CONTROL
VALVE

EGR VALVE

B

B

W

Y

*2

EVAPORATIVE EMISSION
PURGE SOLENOID
(ON: OPEN)

FUEL
TANK

EVAPORATIVE EMISSION
CANISTER

EVAPORATIVE EMISSION
VENTILATION SOLENOID
(ON: CLOSED)

B

*1

*1

EMISSION CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-105

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.

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)

M1173005000323

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 cleaner into the crankcase
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

AK301841

BREATHER HOSE

VENTILATION HOSE

POSITIVE CRANKCASE
VENTILATION VALVE

AB

EMISSION CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-106

COMPONENT LOCATION

M1173007400231

POSITIVE CRANKCASE VENTILATION SYSTEM
CHECK

M1173001100232

1. Remove the positive crankcase ventilation (PCV) valve from

the rocker cover, then reconnect the PCV valve to the
vacuum supply hose.

2. With the engine idling, put your finger on the open end of the

PCV valve, and check for negative pressure (vacuum).
NOTE: At this time, the plunger in the PCV valve should
move back and forth as the open end is covered and uncov-
ered.

3. If negative pressure is not felt, clean or replace the PCV

valve. Inspect the vacuum supply hose and vacuum supply
hose port for restriction or plugged condition.

POSITIVE CRANKCASE VENTILATION VALVE
CHECK

M1173001200228

1. Hold the positive crankcase ventilation (PCV) valve with the

vacuum side down. Insert a thin rod, and using light
pressure, depress the end of the PCV valve spring by 5

− 10

mm (0.2

− 0.3 inch). Release pressure on the rod to see if

the PCV valve spring will lift the rod to its original position.

2. If the rod returns quickly to its original position, the PCV

valve is OK. If the stick does not return quickly, clean or
replace the PCV valve.

AK200069

POSITIVE CRANKCASE VENTILATION VALVE

AC

AK203692

POSITIVE CRANKCASE
VENTILATION VALVE

AC

AK301831

5 – 10 mm

(0.2 – 0.3 in)

THIN ROD
(VERY SMOOTH)

POSITIVE
CRANKCASE
VENTILATION
VALVE

VACUUM SIDE

AB