Mitsubishi Montero (2004+). Manual — part 413
EMISSION CONTROL
TSB Revision
ENGINE AND EMISSION CONTROL
17-59
EMISSION CONTROL
GENERAL DESCRIPTION
M1173000100228
The emission control system consists of the fol-
lowing subsystems:
• Positive crankcase ventilation system
• Evaporative emission system
• Exhaust emission control system
DIAGNOSIS
M1173000700112
SYMPTOM
PROBABLE CAUSE
REMEDY
Engine will not start or hard
to start
Vacuum hose disconnected or damaged Repair or replace
The EGR valve (Stepper Motor) is not
closed.
Repair or replace
Malfunction of the evaporative emission
purge solenoid
Repair or replace
Rough idle or engine stalls
The EGR valve (Stepper Motor) is not
closed.
Repair or replace
Vacuum hose disconnected or damaged. Repair or replace
Malfunction of the positive crankcase
ventilation valve
Replace
Malfunction of the purge control system
Check the system; If there is a
problem, check its component
parts.
Engine hesitates or poor
acceleration
Malfunction of the exhaust gas
recirculation system
Check the system; If there is a
problem, check its component
parts.
Excessive oil consumption
Positive crankcase ventilation line
clogged
Check positive crankcase
ventilation system
Poor fuel mileage
Malfunction of the exhaust gas
recirculation system
Check the system; If there is a
problem, check its component
parts.
EMISSION CONTROL
TSB Revision
ENGINE AND EMISSION CONTROL
17-60
SPECIAL TOOLS
M1173000600193
TOOL
TOOL NUMBER AND
NAME
SUPERSESSION
APPLICATION
MB995061
Purge flow indicator
MLR6890A
Part of MIT280220
Inspection of purge
control system
MB991658
Test harness set
Tool not available
Inspection of EGR valve
(Stepper Motor)
MD998770
Oxygen sensor wrench
MD998770-01 or General
service tool
Removal/installation of
heated oxygen sensor
MB991658
EMISSION CONTROL
TSB Revision
ENGINE AND EMISSION CONTROL
17-61
VACUUM HOSES
VACUUM HOSE ROUTING
M1173000900406
AK301585
EVAPORATIVE
EMISSION
CANISTER
EVAPORATIVE
EMISSION
VENTILATION
SOLENOID
FUEL
TANK
EVAPORATIVE
EMISSON PURGE
SOLENOID
THROTTLE BODY
INTAKE MANIFOLD
TUNING ACTUATOR
VACUUM
TANK
INTAKE
MANIFOLD
TUNING
SOLENOID
FRONT
FUEL PRESSURE
REGULATOR
B: BLACK
*1: RED PAINT MARK
*2: WHITE PAINT MARK
*2
B
B
B
B
B
B
B
AB
*1
*1
EMISSION CONTROL
TSB Revision
ENGINE AND EMISSION CONTROL
17-62
VACUUM CIRCUIT DIAGRAM
M1173007100241
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.
AK301586
THROTTLE BODY
INTAKE MANIFOLD
FROM
AIR CLEANER
TO
COMBUSTION
CHAMBER
AB
FUEL PRESSURE
REGULATOR
B : BLACK
*1: RED PAINT MARK
*2: WHITE PAINT MARK
B
B
EVAPORATIVE EMISSION
PURGE SOLENOID
(ON: OPEN)
FUEL
TANK
EVAPORATIVE EMISSION
CANISTER
EVAPORATIVE EMISSION
VENTILATION SOLENOID
(ON: CLOSED)
*1
*2
*1
B
INTAKE
MANIFOLD
TUNING
SOLENOID
(ON: OPEN)
INTAKE MANIFOLD
TUNING ACTUATOR
B
B
B
B
VACUUM
TANK
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