1991 MITSUBISHI MONTERO check engine

key fob lug pattern wheel size oil viscosity engine overheat roof

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$MITSUBISHI MONTERO 1991 Service Manual ENGINE COMPONENTS ACCELERATOR PEDAL POSITION SENSORS ACCELERATOR PEDAL POSITION SENSOR INSPECTION��\ ��\ ��\ ��\ ��$

ENGINE COMPONENTS
ACCELERATOR PEDAL POSITION SENSORS
ACCELERATOR PEDAL POSITION SENSOR INSPECTION\
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Condition Code Procedure
Attaching hardware
missing ................ C .......... Require replacement of
hardware.
Attaching hardware
threads damaged ........ A ... Require repair or replacement
of hardware.
Attaching hardware
threads stripped
(threads missing) ...... A ... Require repair or replacement
of hardware.
Connector broken ........ A .. Require repair or replacement.
Connector (Weatherpack
type) leaking .......... A .. Require repair or replacement.
Connector melted ........ A ........... ( 1) Require repair or
replacement.
Connector missing ....... C ............ Require replacement.
Inoperative ............. B ........... ( 2) Require repair or
replacement. Further
inspection required.
Missing ................. C ............ Require replacement.
Resistance out of
specification .......... B .. Require repair or replacement.
Terminal broken ......... A .. Require repair or replacement.
Terminal burned, affecting
performance ............ A ........... ( 1) Require repair or
replacement.
Terminal burned, not
affecting performance .. 2 .. Suggest repair or replacement.
Terminal corroded,
affecting performance .. A .. Require repair or replacement.
Terminal corroded, not
affecting performance .. 2 .. Suggest repair or replacement.
Terminal loose, affecting
performance ............ B .. Require repair or replacement.
Terminal loose, not
affecting performance .. 1 .. Suggest repair or replacement.
Threads stripped (threads
missing) ............... A ............ Require replacement.
Wire lead conductors
exposed ................ B .. Require repair or replacement.
Wire lead corroded ...... A .. Require repair or replacement.
Wire lead open .......... A .. Require repair or replacement.
Wire lead shorted ....... A .. Require repair or replacement.
( 1) - Determine cause and correct prior to repair or
replacement of part.
( 2) - Inoperative includes intermittent operation or out of OEM
specification. Some components may be serviceable; check
for accepted cleaning procedure.
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ACCESSORY BELTS
ACCESSORY BELT INSPECTION

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MITSUBISHI MONTERO 1991 Service Manual Attaching hardware
threads stripped
(threads missing) ...... A ... Require repair or replacement
of hardware.
Connector broken ........ A

Attaching hardware
threads stripped
(threads missing) ...... A ... Require repair or replacement
of hardware.
Connector broken ........ A .. Require repair or replacement.
Connector (Weatherpack
type) leaking .......... A .. Require repair or replacement.
Connector melted ........ A ........... (1) Require repair or
replacement.
Connector missing ....... C ............ Require replacement.
Contaminated ............ A ........... ( 2) Require repair or
replacement.
Inoperative ............. B ........... ( 3) Require repair or
replacement. Further
inspection required.
Leaking ................. A .. Require repair or replacement.
Missing ................. C ............ Require replacement.
Resistance out of
specification ........... B .. Require repair or replacement.
Restricted, affecting
performance ............ A .. Require repair or replacement.
Terminal broken ......... A .. Require repair or replacement.
Terminal burned, affecting
performance ............ A ........... ( 1) Require repair or
replacement.
Terminal burned, not
affecting performance .. 2 .. Suggest repair or replacement.
Terminal corroded,
affecting performance .. A .. Require repair or replacement.
Terminal corroded, not
affecting performance .. 2 .. Suggest repair or replacement.
Terminal loose, affecting
performance ............ B .. Require repair or replacement.
Terminal loose, not
affecting performance .. 1 .. Suggest repair or replacement.
Threads damaged ......... A .. Require repair or replacement.
Threads stripped (threads
missing) ............... A ............ Require replacement.
Wire lead conductors
exposed ................ B .. Require repair or replacement.
Wire lead corroded ...... A .. Require repair or replacement.
Wire lead open .......... A .. Require repair or replacement.
Wire lead shorted ....... A .. Require repair or replacement.
( 1) - Determine cause and correct prior to repair or
replacement of part.
( 2) - Determine source of contamination, such as engine
coolant, fuel, metal particles, or water. Require
repair or replacement.
( 3) - Inoperative includes intermittent operation or out of OEM
specification. Some components may be serviceable; check
for accepted cleaning procedure.
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AIR CONDITIONING PRESSURE SENSORS
AIR CONDITIONING PRESSURE SENSOR INSPECTION\
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Condition Code Procedure
Attaching hardware
missing ................ C .......... Require replacement of
hardware.

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MITSUBISHI MONTERO 1991 Service Manual Attaching hardware
threads damaged ........ A ... Require repair or replacement
of hardware.
Attaching hardware
threads stripped
(threads mi

Attaching hardware
threads damaged ........ A ... Require repair or replacement
of hardware.
Attaching hardware
threads stripped
(threads missing) ...... A ... Require repair or replacement
of hardware.
Connector broken ........ A .. Require repair or replacement.
Connector (Weatherpack
type) leaking .......... A .. Require repair or replacement.
Connector melted ........ A ........... (1) Require repair or
replacement.
Connector missing ....... C ............ Require replacement.
Contaminated ............ A ........... ( 2) Require repair or
replacement.
Inoperative ............. B ........... ( 3) Require repair or
replacement. Further
inspection required.
Leaking ................. A .. Require repair or replacement.
Missing ................. C ............ Require replacement.
Resistance out of
specification .......... B .. Require repair or replacement.
Restricted, affecting
performance ............ A .. Require repair or replacement.
Terminal broken ......... A .. Require repair or replacement.
Terminal burned, affecting
performance ............ A ........... ( 1) Require repair or
replacement.
Terminal burned, not
affecting performance .. 2 .. Suggest repair or replacement.
Terminal corroded,
affecting performance .. A .. Require repair or replacement.
Terminal corroded, not
affecting performance .. 2 .. Suggest repair or replacement.
Terminal loose, affecting
performance ............ B .. Require repair or replacement.
Terminal loose, not
affecting performance .. 1 .. Suggest repair or replacement.
Threads damaged ......... A .. Require repair or replacement.
Threads stripped (threads
missing) ............... A ............ Require replacement.
Wire lead conductors
exposed ................ B .. Require repair or replacement.
Wire lead corroded ...... A .. Require repair or replacement.
Wire lead open .......... A .. Require repair or replacement.
Wire lead shorted ....... A .. Require repair or replacement.
( 1) - Determine cause and correct prior to repair or
replacement of part.
( 2) - Determine source of contamination, such as engine
coolant, fuel, metal particles, or water. Require
repair or replacement.
( 3) - Inoperative includes intermittent operation or out of
OEM specification. Some components may be serviceable;
check for accepted cleaning procedure.
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AIR DUCTS AND TUBES
AIR DUCT AND TUBE INSPECTION\
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Condition Code Procedure

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$MITSUBISHI MONTERO 1991 Service Manual AIR FUEL RATIO SENSOR INSPECTION��\ ��\ ��\ ��\ ��\ ��\ ��\ �� Condition$

AIR FUEL RATIO SENSOR INSPECTION\
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Condition Code Procedure
Attaching hardware
missing ................ C .......... Require replacement of
hardware.
Attaching hardware
threads damaged ........ A ... Require repair or replacement
of hardware.
Attaching hardware
threads stripped
(threads missing) ...... A ... Require repair or replacement
of hardware.
Connector broken ........ A .. Require repair or replacement.
Connector (Weatherpack
type) leaking .......... A .. Require repair or replacement.
Connector melted ........ A ........... (1) Require repair or
replacement.
Connector missing ....... C ............ Require replacement.
Contaminated ............ A ........... ( 2) Require repair or
replacement.
Inoperative ............. B ........... ( 3) Require repair or
replacement. Further
inspection required.
Leaking ................. A .. Require repair or replacement.
Missing ................. C ............ Require replacement.
Resistance out of
specification .......... B .. Require repair or replacement.
Restricted, affecting
performance ............ A .. Require repair or replacement.
Terminal broken ......... A .. Require repair or replacement.
Terminal burned, affecting
performance ............ A ........... ( 1) Require repair or
replacement.
Terminal burned, not
affecting performance .. 2 .. Suggest repair or replacement.
Terminal corroded,
affecting performance .. A .. Require repair or replacement.
Terminal corroded, not
affecting performance .. 2 .. Suggest repair or replacement.
Terminal loose, affecting
performance ............ B .. Require repair or replacement.
Terminal loose, not
affecting performance .. 1 .. Suggest repair or replacement.
Threads damaged ......... A .. Require repair or replacement.
Threads stripped (threads
missing) ............... A ............ Require replacement.
Wire lead conductors
exposed ................ B .. Require repair or replacement.
Wire lead corroded ...... A .. Require repair or replacement.
Wire lead open .......... A .. Require repair or replacement.
Wire lead shorted ....... A .. Require repair or replacement.
( 1) - Determine cause and correct prior to repair or
replacement of part.
( 2) - Determine source of contamination, such as engine
coolant, fuel, metal particles, or water. Require
repair or replacement.
( 3) - Inoperative includes intermittent operation or out of
OEM specification. Some components may be serviceable;
check for accepted cleaning procedure.
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Page 492 of 1333

MITSUBISHI MONTERO 1991 Service Manual replacement of part.
(2) - Determine source of contamination, such as engine coolant,
fuel, metal particles, or water. Require repair or
replacement.
( 3) - Inoperative includes inte

replacement of part.
(2) - Determine source of contamination, such as engine coolant,
fuel, metal particles, or water. Require repair or
replacement.
( 3) - Inoperative includes intermittent operation or out of
OEM specification. Some components may be serviceable;
check for accepted cleaning procedure.
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BATTERIES
Proper operation of any electrical system or component can be
affected by battery condition. The battery(ies) must meet or exceed
minimum specification for vehicle as equipped and test to that
specific battery's CCA.
Definition of Terms
* Battery Performance Testing
Testing that determines whether or not a battery meets both
vehicle OEM and battery manufacturer's specifications.
* Cold Cranking Amp (CCA) Rating
The number of amperes a new, fully charged battery at
0
F (-17.8 C) can deliver for 30 seconds and maintain at
least a voltage of 1.2 volts per cell (7.2 volts for a
12-volt battery).
* Cranking Amps (CA)
The number of amperes a new, fully charged battery, typically
at 32
F (0 C) can deliver for 30 seconds and maintain at
least a voltage of 1.2 volts per cell (7.2 volts for a
12-volt battery).
* OEM Cranking Amps
The minimum CCA required by the original vehicle manufacturer
for a specific vehicle.
BATTERY INSPECTION
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Condition Code Procedure
Battery frozen .......... .. ......... ( 1) Further inspection
required.
Case leaking ............ A ............ Require replacement.
Casing swollen .......... A .......... ( 2) Further inspection
required.
Circuit open internally . A ............ Require replacement.
Electrolyte
contamination .......... A .......... ( 2) Further inspection
required.
Electrolyte
discoloration .......... A .......... ( 2) Further inspection
required.
Fails to accept and
hold charge ............ A ........ ( 3) Require replacement.
Fluid level low ......... B .......... ( 4) Further inspection
required.
Out of performance
specification
for battery ............ B ........ ( 5) Require replacement.
Out of specification for
application ............ B ........ ( 5) Require replacement.

Page 497 of 1333

$MITSUBISHI MONTERO 1991 Service Manual ��\ ��\ ��\ ��\ ��\ ��\ ��\ �� Condition Code$

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Condition Code Procedure
Attaching hardware
missing ................ C .......... Require replacement of
hardware.
Attaching hardware threads
damaged ................ A ... Require repair or replacement
of hardware.
Attaching hardware
threads stripped
(threads missing) ...... A ... Require repair or replacement
of hardware.
Connector broken ........ A .. Require repair or replacement.
Connector (Weatherpack
type) leaking .......... A .. Require repair or replacement.
Connector melted ........ A ........... (1) Require repair or
replacement.
Connector missing ....... C ............ Require replacement.
Contaminated ............ A ........... ( 2) Require repair or
replacement.
Inoperative ............. B ........... ( 3) Require repair or
replacement. Further
inspection required.
Leaking ................. A .. Require repair or replacement.
Missing ................. C ............ Require replacement.
Terminal broken ......... A .. Require repair or replacement.
Terminal burned, affecting
performance ............ A ........... ( 1) Require repair or
replacement.
Terminal burned, not
affecting performance .. 2 .. Suggest repair or replacement.
Terminal corroded,
affecting performance .. A .. Require repair or replacement.
Terminal corroded, not
affecting performance .. 2 .. Suggest repair or replacement.
Terminal loose, affecting
performance ............ B .. Require repair or replacement.
Terminal loose, not
affecting performance .. 1 .. Suggest repair or replacement.
Wire lead conductors
exposed ................ B .. Require repair or replacement.
Wire lead corroded ...... A .. Require repair or replacement.
Wire lead open .......... A .. Require repair or replacement.
Wire lead shorted ....... A .. Require repair or replacement.
( 1) - Determine cause and correct prior to repair or
replacement of part.
( 2) - Determine source of contamination, such as engine
coolant, fuel, metal particles, or water. Require
repair or replacement.
( 3) - Inoperative includes intermittent operation or out of
OEM specification. Some components may be serviceable;
check for accepted cleaning procedure.
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CARBURETORS AND CHOKES
NOTE: Proper operation of a carburetor includes the ability to
control air/fuel mixtures during all phases or driving
operation to comply with all federal and local emissions
standards. Adjustments are to be considered repairs.

Page 498 of 1333

$MITSUBISHI MONTERO 1991 Service Manual CARBURETOR AND CHOKE INSPECTION��\ ��\ ��\ ��\ ��\ ��\ ��\ �� Condition$

CARBURETOR AND CHOKE INSPECTION\
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Condition Code Procedure
Air/fuel control
incorrect .............. B .. Require repair or replacement.
Application incorrect ... B .. Require repair or replacement.
Attaching hardware
broken ................. A ... Require repair or replacement
of hardware.
Attaching hardware
missing ................ C .......... Require replacement of
hardware.
Attaching hardware not
functioning ............ A ... Require repair or replacement
of hardware.
Components binding ...... A .. Require repair or replacement.
Components damaged,
affecting operation or
performance ............ A .. Require repair or replacement.
Components missing ...... C .......... Require replacement of
components.
Contaminated ............ A ........... (1) Require repair or
replacement. Further
inspection required.
Controlling linkages
binding ................ A ... Require repair or replacement
of linkage.
Leaking ................. A .. Require repair or replacement.
Mechanical operation
incorrect .............. B .. Require repair or replacement.
Operating incorrectly ... B .. Require repair or replacement.
( 1) - Some components may be serviceable; check for accepted
cleaning procedure. Determine source of contamination,
such as engine coolant, fuel, metal particles, or water.
Require repair or replacement.
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CASTING CORE PLUGS AND EXPANSION PLUGS
CASTING CORE PLUG AND EXPANSION PLUG INSPECTION\
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Condition Code Procedure
Leaking ................. A ............ Require replacement.
Material type
incorrect .............. 2 ............ Suggest replacement.
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CHARGE AIR COOLERS "INTERCOOLERS" (CAC)
CHARGE AIR COOLER "INTERCOOLER" (CAC) INSPECTION\
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Condition Code Procedure
Air-to-air intercooler
leaking, affecting boost
performance ............ A .. Require repair or replacement.
Attaching hardware
broken ................. A ... Require repair or replacement
of hardware.
Attaching hardware

Page 503 of 1333

MITSUBISHI MONTERO 1991 Service Manual replacement.
Inoperative ............. B ........... (3) Require repair or
replacement. Further

replacement.
Inoperative ............. B ........... (3) Require repair or
replacement. Further
inspection required.
Leaking ................. A .. Require repair or replacement.
Missing ................. C ............ Require replacement.
Resistance out of
specification .......... B .. Require repair or replacement.
Terminal broken ......... A .. Require repair or replacement.
Terminal burned, affecting
performance ............ A ........... ( 1) Require repair or
replacement.
Terminal burned, not
affecting performance .. 2 .. Suggest repair or replacement.
Terminal corroded,
affecting performance .. A .. Require repair or replacement.
Terminal corroded, not
affecting performance .. 2 .. Suggest repair or replacement.
Terminal loose, affecting
performance ............ B .. Require repair or replacement.
Terminal loose, not
affecting performance .. 1 .. Suggest repair or replacement.
Threads damaged ......... A .. Require repair or replacement.
Threads stripped (threads
missing) ............... A ............ Require replacement.
Wire lead conductors
exposed ................ B .. Require repair or replacement.
Wire lead corroded ...... A .. Require repair or replacement.
Wire lead open .......... A .. Require repair or replacement.
Wire lead shorted ....... A .. Require repair or replacement.
( 1) - Determine cause and correct prior to repair or
replacement of part.
( 2) - Determine source of contamination, such as engine
coolant, fuel, metal particles, or water. Require
repair or replacement.
( 3) - Inoperative includes intermittent operation or out of
OEM specification. Some components may be serviceable;
check for accepted cleaning procedure.
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COOLING FAN MOTOR SWITCHES
See COOLING FAN MOTOR SENSORS AND SWITCHES .
COOLING FAN MOTORS
COOLING FAN MOTOR INSPECTION\
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Condition Code Procedure
Attaching hardware
broken ................. A .. Require repair or replacement
of hardware.
Attaching hardware
missing ................ C ......... Require replacement of
hardware.
Attaching hardware not
functioning ............ A .. Require repair or replacement
of hardware.
Connector broken ........ A . Require repair or replacement.
Connector (Weatherpack
type) leaking .......... A . Require repair or replacement.

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