Mitsubishi Pajero Pinin. Manual - part 162

ENGINE AND EMISSION CONTROL – 

Emission Control System

17-17

CATALYTIC CONVERTER

GENERAL INFORMATION

The three-way catalytic converter, together with the
closed loop air-fuel ratio control based on the oxygen
sensor signal, oxidizes carbon monoxides (CO) and
hydrocarbons (HC) and reduces nitrogen oxides
(NOx).

When the mixture is controlled at stoichiometric
air-fuel ratio, the three-way catalytic converter
provides the highest purification against the three
constituents, namely, CO, HC and NOx.

REMOVAL AND INSTALLATION

49 Nm

49 Nm

34 Nm

49  Nm

1

2

3

Removal steps

1. Oxygen sensor harness connector

connection

2. Front exhaust pipe
3. Catalytic converter

NOTES

17-1

ENGINE AND

EMISSION

CONTROL

CONTENTS

EMISSION CONTROL SYSTEM

GENERAL

2

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Outline of Change

2

. . . . . . . . . . . . . . . . . . . . . . . . . 

SERVICE SPECIFICATIONS

2

. . . . . . . . . . . . . . 

VACUUM HOSE

2

. . . . . . . . . . . . . . . . . . . . . . . . . 

Vacuum Hose Piping Diagram

2

. . . . . . . . . . . . . . 

Vacuum Circuit Diagram

3

. . . . . . . . . . . . . . . . . . . . 

EVAPORATIVE EMISSION CONTROL
SYSTEM

3

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Purge Control System Check

3

. . . . . . . . . . . . . . . 

Purge Port Vacuum Check

4

. . . . . . . . . . . . . . . . . . 

Purge Control Solenoid Valve Check

4

. . . . . . . . 

ENGINE AND EMISSION CONTROL – 

Emission Control System

17-2

EMISSION CONTROL SYSTEM

GENERAL

OUTLINE OF CHANGE

The flow rate of the purge control solenoid valve has been increased and the vacuum line routing has
been changed. Due to these changes, the following service procedures have been established. Other
items are the same as before. 

SERVICE SPECIFICATION

Items

Standard value

EGR control solenoid valve coil resistance (at 20 



C) 

Ω

30 – 34

VACUUM HOSE

VACUUM HOSE PIPING DIAGRAM

Air cleaner

Fuel pump
(high
pressure)

Throttle control servo

Canister

Purge control
solenoid valve
(ON: Open)

EGR valve
(Stepper
motor)

Oxygen sensor (front)

Oxygen sensor (rear)

Catalytic converter

Air

From fuel pump
(low pressure)

To fuel tank

Positive
crankcase
ventilation
(PCV) valve

M