Mitsubishi Outlander (2013+). Manual - part 356

EMISSION CONTROL <MPI>

ENGINE AND EMISSION CONTROL

17-25

EMISSION CONTROL <MPI>

GENERAL INFORMATION

M1173000102105

The emission control system consists of the following 
subsystems:

• Crankcase emission control system

• Evaporative emission control system

•

Items

Name

Specification

Crankcase emission control 
system

Positive crankcase ventilation 
valve

Variable flow type
(Purpose: HC reduction)

Evaporative emission control 
system

• Canister

• Purge control solenoid valve

Equipped
Duty cycle type solenoid valve
(Purpose: HC reduction)

Emission reduction control system Air-fuel ratio control device - MPI 

system

Oxygen sensor feedback type 
(Purpose: CO, HC, NOx reduction)

Catalytic converter

Monolith type
(Purpose: CO, HC, NOx reduction)

Emission reduction control system

EMISSION CONTROL DEVICE 
REFERENCE TABLE

M1173006601224

Related parts

Crankcase 
emission 
control 
system

Evaporative 
emission 
control 
system

Air/fuel ratio 
control 
system

Catalytic 
converter

Positive crankcase ventilation 
valve

×

−

−

−

Purge control solenoid valve

−

×

−

−

MPI system component

−

×

×

−

Catalytic converter

−

−

−

×

SERVICE SPECIFICATION(S)

M1173000301593

Item

Standard value

Purge control solenoid valve coil resistance (at 20

°C) Ω

22 

− 26 

EMISSION CONTROL <MPI>

ENGINE AND EMISSION CONTROL

17-26

VACUUM HOSE

VACUUM HOSE PIPING DIAGRAM

M1173000902253

AKB00864

Purge control 
solenoid valve

Canister

Air

From 
fuel pump

Positive
crankcase
ventilation
valve

Oxygen sensor (front)

Oxygen sensor (rear)

Catalytic 
converter

AB

Air cleaner

Catalytic 
converter

EMISSION CONTROL <MPI>

ENGINE AND EMISSION CONTROL

17-27

VACUUM CIRCUIT DIAGRAM

M1173007101642

AK604725AC

Inlet manifold

From
air
cleaner

To
combustion
chamber

Purge control
solenoid valve

Canister

Chamber

Throttle body

B

B

B

Vacuum hose colour
B: Black

White paint mark

White paint mark

White paint mark

VACUUM HOSE CHECK

M1173007301033

1. Using the vacuum circuit diagram as a guide, 

check to be sure that the vacuum hoses are 
correctly connected.

2. Check the connection condition of the vacuum 

hoses which can be removed, loosened, clogged 
possibly. And then check whether there are no 
folded and damaged vacuum hoses.

VACUUM HOSE INSTALLATION

M1173007200709

1. When connecting the vacuum hoses, they should 

be securely inserted onto the nipples.

2. Connect the hoses correctly, using the vacuum 

circuit diagram as a guide.

CRANKCASE EMISSION CONTROL 
SYSTEM

GENERAL INFORMATION (CRANKCASE 
EMISSION CONTROL SYSTEM)

M1173005001713

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 valve.
The positive crankcase ventilation 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.

EMISSION CONTROL <MPI>

ENGINE AND EMISSION CONTROL

17-28

SYSTEM DIAGRAM

AKB00860AB

Ventilation hose

Breather hose

Air cleaner

Air

Positive
crankcase
ventilation
valve

COMPONENT LOCATION (CRANKCASE 
EMISSION CONTROL SYSTEM)

M1173007401223

AKA00023

AB

Positive crankcase
ventilation valve

POSITIVE CRANKCASE VENTILATION 
SYSTEM CHECK

M1173001101398

1. Remove the ventilation hose from the positive 

crankcase ventilation valve.

2. Remove the positive crankcase ventilation valve 

from the cylinder head cover.

3. Install the positive crankcase ventilation valve at 

the ventilation hose.

4. Start the engine and run at idle.

AK604163

Positive 
crankcase 
ventilation 
valve

AD

5. Place a finger at the opening of the positive 

crankcase ventilation valve and check that 
vacuum of the inlet manifold is felt.

NOTE: At this moment, the plunger in the positive 
crankcase ventilation valve moves back and forth.

6. If vacuum is not felt, clean the positive crankcase 

ventilation valve or replace it.

7. Apply a small amount of new engine oil to the 

O-ring on the positive crankcase ventilation valve, 
and tighten to the specified torque. 

Standard value: 2.5 

± 0.4 N⋅m

POSITIVE CRANKCASE VENTILATION 
VALVE CHECK

M1173001201210