Mitsubishi Montero (2002-2004). Manual - part 851

EMISSION CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-67

<EVAPORATIVE EMISSION CANISTER>

REMOVAL STEPS

1. ORVR VENT VALVE MODULE 

COVER A

2. ORVR VENT VALVE MODULE 

COVER B <VEHICLES WITHOUT 
REAR HEATER OR REAR A/C>

3. EVAPORATIVE EMISSION 

VENTILATION SOLENOID 
CONNECTOR

4. VENT HOSE A CONNECTION
5. ORVR VENT VALVE MODULE, CAP, 

VENT HOSE, VENT PIPE AND 
BRACKET ASSEMBLY

6. EVAPORATIVE EMISSION 

VENTILATION SOLENOID

7. CAP
8. VENT HOSE D
9. VENT HOSE B
10. VENT HOSE C
11. VENT PIPE
12. ORVR VENT VALVE MODULE
13. ORVR VENT VALVE MODULE 

BRACKET

REMOVAL STEPS (Continued)

AC204037

1

2

9

8

7

6

5

4

3

13

12

11

10

1

2

AB

EMISSION CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-68

INSTALLATION SERVICE POINT

.

>>A<< EVAPORATIVE EMISSION CANISTER/EVAPORA-
TIVE EMISSION CANISTER BRACKET B/EVAPORATIVE 
EMISSION CANISTER BRACKET A/EVAPORATIVE EMIS-
SION CANISTER BRACKET D/EVAPORATIVE EMISSION 
CANISTER BRACKET C/EVAPORATIVE EMISSION CANIS-
TER AND BRACKET ASSEMBLY INSTALLATION
Follow the procedure below, taking care not to apply excessive 
force to the evaporative emission canister.
1. Temporarily install the evaporative emission canister 

brackets A and B to the evaporative emission canister with 
mounting bolts 1 and 2.

2. Tighten mounting bolt 2 securely.
3. Install the evaporative emission canister brackets C and D to 

the evaporative emission canister brackets A and B with 
mounting bolt 3 and nut 4.

4. Tighten mounting bolt 1 securely, and install the evaporative 

emission canister and bracket assembly to the vehicle.

NOTE: D: Nominal diameter, L: Nominal length

REMOVAL STEPS

• REAR SUSPENSION ASSEMBLY 

(REFER TO GROUP 34, REAR 
SUSPENSION ASSEMBLY 

P.34-8

.)

1. REAR HEATER PIPE CONNECTION 

<VEHICLES WITH REAR HEATER>

2. REAR A/C PIPE CONNECTION 

<VEHICLES WITH REAR A/C>

3. FRAME WIRING HARNESS 

CONNECTION

4. VENT HOSE A 
5. PURGE HOSE B
6. VAPOR HOSE
7. PURGE HOSE A

>>A<<

8. EVAPORATIVE EMISSION 

CANISTER AND BRACKET 
ASSEMBLY

>>A<<

9. EVAPORATIVE EMISSION 

CANISTER BRACKET C

>>A<<

10. EVAPORATIVE EMISSION 

CANISTER BRACKET D

>>A<<

11. EVAPORATIVE EMISSION 

CANISTER BRACKET A

>>A<<

12. EVAPORATIVE EMISSION 

CANISTER BRACKET B

>>A<<

13. EVAPORATIVE EMISSION 

CANISTER

REMOVAL STEPS (Continued)

NAME

SYMBOL

QUANTITY

SIZE mm
(D 

× L)

Bolt, washer 
assembled

1

2

M8 

× 14

2, 3

4

M8 

× 18

Nut, washer 
assembled

4

2

M8

AC102254AB

BRACKET A

BRACKET C

BRACKET B

BRACKET D

1

1

2

2

3

4

4

3

EMISSION CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-69

5. Tighten mounting bolt 5 by hand.
6. Tighten mounting bolt 6 by hand.
7. Tighten mounting bolts 7 to the specified torque.
8. Tighten mounting bolts 5 and 6 to the specified torque.

NOTE: D: Nominal diameter, L: Nominal length

INSPECTION

M1173004900088

EVAPORATIVE EMISSION VENTILATION 
SOLENOID CHECK

1. Connect a hand vacuum pump to nipple (A) of the solenoid.
2. Check air tightness by applying a vacuum with voltage 

applied directly from the battery to the evaporative emission 
ventilation solenoid and without applying voltage.

3. Measure the resistance between the terminals of the 

solenoid.

Standard value: 17 

− 21 Ω [at 20°C (68°F)]

NAME

SYMBOL

QUANTITY

SIZE mm
(D 

× L)

Bolt, washer 
assembled

5, 6, 7

4

M8 

× 18

AC204038AB

5

6

7

7

BATTERY VOLTAGE

NORMAL CONDITION

Applied

Vacuum maintained

Not applied

Vacuum leaks

AC101980AB

A

AC101981AB

EMISSION CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-70

CATALYTIC CONVERTER

GENERAL INFORMATION (CATALYTIC CONVERTER)

M1173005300045

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 constitu-
ents, namely, CO, HC and NOx.

REMOVAL AND INSTALLATION

M1173003900290

Required Special Tool:

• MD998770: Oxygen Sensor Wrench

Pre-removal and Post-installation Operation
Front Under Cover Removal and Installation

AC000176

44 ± 5 N·m
33 ± 3 ft-lb

1, 2, 3

1

2

3

4

6

7

8

N

N

N

25 ± 4 N·m
18 ± 3 ft-lb

49 ± 10 N·m
37 ± 7 ft-lb

49 ± 4 N·m
37 ± 3 ft-lb

49 ± 10 N·m
37 ± 7 ft-lb

59 ± 10 N·m
44 ± 7 ft-lb

AC

9

5

REMOVAL STEPS

<<A>> >>A<<

1. RIGHT BANK HEATED OXYGEN 

SENSOR (REAR)

<<A>> >>A<<

2. LEFT BANK HEATED OXYGEN 

SENSOR (REAR)

<<A>> >>A<<

3. LEFT BANK HEATED OXYGEN 

SENSOR (FRONT)

4. WARM UP THREE WAY CATALYTIC 

CONVERTER

5. GASKET
6. BRACKET
7. SEAL RING
8. CATALYTIC CONVERTER
9. GASKET

REMOVAL STEPS (Continued)