Mitsubishi Montero (2004+). Manual — part 417
EMISSION CONTROL
TSB Revision
ENGINE AND EMISSION CONTROL
17-75
INSPECTION
M1173004900163
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)]
CATALYTIC CONVERTER
GENERAL DESCRIPTION (CATALYTIC CONVERTER)
M1173005300131
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), also reduces nitrogen oxides
(NOx).
When the mixture is controlled at stoichiometric
air-fuel ratio, the three way catalytic converter pro-
vides the highest purification against the three con-
stituents, namely, CO, HC and NOx.
BATTERY VOLTAGE
NORMAL CONDITION
Applied
Vacuum maintained
Not applied
Vacuum leaks
AC101980AB
A
AC101981AB
EMISSION CONTROL
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ENGINE AND EMISSION CONTROL
17-76
REMOVAL AND INSTALLATION
M1173003900416
Required Special Tool:
• MD998770: Oxygen Sensor Wrench
REMOVAL SERVICE POINT
.
<<A>> RIGHT BANK HEATED OXYGEN SENSOR
(REAR)/LEFT BANK HEATED OXYGEN SENSOR
(REAR)/LEFT BANK HEATED OXYGEN SENSOR (FRONT)
REMOVAL
Use special tool MD998770 to remove the oxygen sensor.
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
5
6
7
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
49 ± 10 N·m
37 ± 7 ft-lb
AB
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)
ACX02426 AB
MD998770
SPECIFICATIONS
TSB Revision
ENGINE AND EMISSION CONTROL
17-77
INSTALLATION SERVICE POINT
.
>>A<< LEFT BANK HEATED OXYGEN SENSOR
(FRONT)/LEFT BANK HEATED OXYGEN SENSOR
(REAR)/RIGHT BANK HEATED OXYGEN SENSOR (REAR)
INSTALLATION
Use special tool MD998770 to install the oxygen sensor.
SPECIFICATIONS
FASTENER TIGHTENING SPECIFICATIONS
M1173006400346
SERVICE SPECIFICATIONS
M1173000300341
ACX02426 AB
MD998770
ITEM
SPECIFICATION
Emission control system
Bracket bolt
49
± 10 N⋅m (37 ± 7 ft-lb)
Front exhaust pipe bolt
25
± 4 N⋅m (18 ± 3 ft-lb)
Heated oxygen sensor
44
± 5 N⋅m (33 ± 3 ft-lb)
Main muffler nut
49
± 10 N⋅m (37 ± 7 ft-lb)
Warm up three way catalytic converter bolt
49
± 4 N⋅m (37 ± 3 ft-lb)
Warm up three way catalytic converter nut
49
± 10 N⋅m (37 ± 7 ft-lb)
Engine control system
Accelerator pedal bracket nut
12
± 2 N⋅m (102 ± 22 in-lb)
Accelerator pedal position sensor bolt
3.5
± 1.0 N⋅m (31 ± 9 in-lb)
ITEMS
STANDARD VALUE
Emission control system
Purge flow cm
3
/s (SCFH) [at 80
− 95°C (176 − 205°F) with sudden revving]
20 (2.5)
Evaporative emission purge solenoid coil resistance [at 20
°C (68°F)] Ω
30
− 34
EGR valve (Stepper Motor) connector resistance [at 20
°C (68°C)] Ω
10
− 20
Evaporative emission ventilation solenoid coil resistance [at 20
°C (68°C)] Ω
17
− 21
NOTES
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