1998 MITSUBISHI MONTERO Service Manual

mileage alternator 4WD deactivate airbag clock setting recommended oil

Page 697 of 1501

MITSUBISHI MONTERO 1998 Service Manual loose .................. A ... Require repair or replacement
of injection tube or
replacement of catalytic

loose .................. A ... Require repair or replacement
of injection tube or
replacement of catalytic
converter.
Air injection tube
restricted ............. A ... Require repair or replacement
of injection tube or
replacement of catalytic
converter.
Air injection tube
threads damaged ........ A ... Require repair or replacement
of injection tube or
replacement of catalytic
converter.
Air injection tube
threads stripped
(threads missing) ...... A ... Require repair or replacement
of injection tube or
replacement of catalytic
converter.
Body cracked ............ B .. Require repair or replacement.
Converter empty ......... A .. Require repair or replacement.
Converter fill plug
missing ................ C .. Require repair or replacement.
Converter missing ....... C ............ Require replacement.
Exhaust gases leaking ... A .. Require repair or replacement.
Flanges leaking ......... A ... Require repair or replacement
of flanges.
Inlet pipes cracked ..... B .. Require repair or replacement.
Internal rattle (except
pellet-type) ........... 2 .......... (1) Further inspection
required.
Mounting brackets that
are part of converter
broken ................. A .. Require repair or replacement.
Obvious overheating ..... .. ......... ( 2) Require testing of
converter.
Outlet pipes cracked .... B .. Require repair or replacement.
Pieces of catalyst
material found
downstream ............. 1 ............ Suggest replacement.
Plugged ................. A ........ ( 3) Require replacement.
Testing has determined
that existing converter
has been lead-poisoned,
contaminated, or failed
testing ................ A .. Require repair or replacement.
( 1) - If the converter is breaking up, suggest converter
replacement. If an object has fallen into the converter,
remove the object.
( 2) - Overheating is caused by something other than the
converter. Further diagnosis is required to determine
the cause of the overheating.
( 3) - Determine cause and correct to ensure that new converter
will not become plugged.
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EXHAUST AND TAIL PIPES
NOTE: For pipes with resonators, also see MUFFLERS AND RESONATORS.
EXHAUST AND TAIL PIPE INSPECTION

Page 698 of 1501

$MITSUBISHI MONTERO 1998 Service Manual ��\ ��\ ��\ ��\ ��\ ��\ ��\ �� Condition Code$

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Condition Code Procedure
Bracket broken .......... A .. Require repair or replacement.
Pipe bent out of
position ............... B .. Require repair or replacement.
Pipe broken ............. A .. Require repair or replacement.
Pipe cracked ............ B .. Require repair or replacement.
Pipe leaking ............ A ............ Require replacement.
Pipe missing ............ C ............ Require replacement.
Pipe plugged ............ A ............ Require replacement.
Pipe weak due to
corrosion, but no leaks
present ................ 1 ............ Suggest replacement.
Weld broken ............. A .. Require repair or replacement.
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EXHAUST CONNECTIONS
EXHAUST CONNECTION INSPECTION\
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Condition Code Procedure
Attaching hardware
incorrect .............. B ......... Require replacement of
hardware.
Clamp broken ............ A ........... Require replacement.
Clamp loose ............. A . Require repair or replacement.
Clamp missing ........... C ........... Require replacement.
Corroded, affecting
structural integrity ... 1 ........... Suggest replacement.
Incorrect type (i.e.
flange, ball & socket
etc.) .................. B ........... Require replacement.
Leaking ................. A ................ Require repair.
Loose ................... A ................ Require repair.
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HANGERS
HANGER INSPECTION\
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Condition Code Procedure
Broken .................. A ............ Require replacement.
Corroded, affecting
structural integrity ... 1 ............ Suggest replacement.
Incorrect type .......... B ............ Require replacement.
Loose ................... A .. Require repair or replacement.
Missing ................. C ............ Require replacement.
Out of position ......... B .. Require repair or replacement.
Rubber deteriorated ..... 1 ............ Suggest replacement.
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HEAT RISERS (MECHANICAL EFE DEVICES)
HEAT RISER (MECHANICAL EFE DEVICE) INSPECTION\
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Condition Code Procedure
Broken .................. A .......... Require replacement of
affected parts.
Diaphragm inoperative ... A ........ ( 1) Require replacement.

Page 699 of 1501

MITSUBISHI MONTERO 1998 Service Manual Leaking ................. A .. Require repair or replacement.
Noisy ................... 2 ... Suggest repair or replacement
of affected parts.
Se

Leaking ................. A .. Require repair or replacement.
Noisy ................... 2 ... Suggest repair or replacement
of affected parts.
Seized .................. A ... Require repair or replacement
of affected parts.
Spring broken ........... B .......... Require replacement of
spring(s).
Spring inoperative ...... A .......... Require replacement of
spring(s).
(1) - If the inoperative diaphragm is separate from the heat
riser, then require replacement of the inoperative
diaphragm. If the inoperative diaphragm is part of the
heat riser, then replace the heat riser.
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HEAT SHIELDS
HEAT SHIELD INSPECTION\
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Condition Code Procedure
Bent .................... B .. Require repair or replacement.
Broken .................. A ............ Require replacement.
Corroded, affecting
structural integrity ... 1 ............ Suggest replacement.
Loose ................... A .. Require repair or replacement.
Missing ................. C ............ Require replacement.
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MANIFOLDS (CAST AND TUBE TYPE)
MANIFOLD (CAST AND TUBE TYPE) INSPECTION\
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Condition Code Procedure
Air injection tube in
manifold broken ........ A ... Require repair or replacement
of injection tube or
replacement of manifold.
Air injection tube in
manifold corroded,
affecting structural
integrity .............. 1 ......... Suggest replacement of
injection tube or manifold.
Air injection tube in
manifold leaking ....... A ... Require repair or replacement
of injection tube or
replacement of manifold.
Air injection tube in
manifold loose ......... A ................. Require repair.
Air injection tube in
manifold restricted .... A .......... Require replacement of
injection tube or manifold.
Air injection tube in
manifold threads
damaged ................ A ..... Require repair of injection
tube or manifold.
Air injection tube in
manifold threads stripped
(threads missing) ...... A .......... Require replacement of
injection tube or manifold.
Bolt broken ............. A ... Require replacement of bolts.

Page 700 of 1501

MITSUBISHI MONTERO 1998 Service Manual Bolt loose .............. A ........... Require tightening or
replacement of bolts.
Bolt missing ............ C ... Require replacement of bolts.
Co

Bolt loose .............. A ........... Require tightening or
replacement of bolts.
Bolt missing ............ C ... Require replacement of bolts.
Corroded, affecting
sealability ............ A .. Require repair or replacement.
Cylinder head threads
stripped ............... A ... Require repair or replacement
of cylinder head.
Gasket leaking .......... A ........... Require tightening or
replacement of gasket.
Heat stove bent ......... B ........... (1) Require repair or
replacement of stove.
Heat stove broken ....... A ......... ( 1) Require replacement
of stove.
Heat stove corroded,
affecting structural
integrity .............. 1 ......... ( 1) Suggest replacement
of stove.
Heat stove missing ...... C ......... ( 1) Require replacement
of stove.
Manifold broken ......... A .. Require repair or replacement.
Manifold cracked ........ B .. Require repair or replacement.
Manifold warped ......... A .. Require repair or replacement.
Out of specification .... B .. Require repair or replacement.
Stud broken ............. A .... Require replacement of stud.
Stud missing ............ C .... Require replacement of stud.
Stud threads damaged .... A ... Require repair or replacement
of stud.
Stud threads stripped
(threads missing) ...... A .... Require replacement of stud.
( 1) - Stove may not be available separately; this may require
replacement of manifold.
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MECHANICAL EFE DEVICES
See HEAT RISERS (MECHANICAL EFE DEVICES) .
MUFFLERS AND RESONATORS
MUFFLER AND RESONATOR INSPECTION\
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Condition Code Procedure
Body shell distorted,
affecting performance or
structural integrity ... A ............ Require replacement.
Corrosion hole .......... A ............ Require replacement.
Missing ................. C ............ Require replacement.
Mounting bracket broken . A .. Require repair or replacement.
Mounting bracket
cracked ................ B .. Require repair or replacement.
Nipple cracked .......... A .. Require repair or replacement.
Nipple loose ............ B ............ Require replacement.
Outer wrap peeling
(exhaust not leaking) .. 1 ............ Suggest replacement.
Plugged ................. A ............ Require replacement.
Puncture (other than a
drain hole) ............ A ............ Require replacement.
Rattling or knocking noise
from inside muffler .... B ............ Require replacement.
Seam open (exhaust

Page 701 of 1501

MITSUBISHI MONTERO 1998 Service Manual leaking) ............... A ............ Require replacement.
Sound quality
unsatisfactory ......... 2 .. Suggest replacement to address
customer need and/

Page 702 of 1501

MITSUBISHI MONTERO 1998 Service Manual F - BASIC TESTING
1998 Mitsubishi Montero
1998 ENGINE PERFORMANCE
Mitsubishi - Basic Diagnostic Procedures
Diamante, Eclipse, Galant, Mirage, Montero, Montero Sport,

F - BASIC TESTING
1998 Mitsubishi Montero
1998 ENGINE PERFORMANCE
Mitsubishi - Basic Diagnostic Procedures
Diamante, Eclipse, Galant, Mirage, Montero, Montero Sport,
3000GT
INTRODUCTION
The following diagnostic steps will help prevent overlooking
a simple problem. This is also where to begin diagnosis for a no-start
condition. The first step in diagnosing any driveability problem is
verifying the customer's complaint with a test drive under the
conditions the problem reportedly occurred.
Before entering self-diagnostics, perform a careful and
complete visual inspection. Most engine control problems result from
mechanical breakdowns, poor electrical connections or
damaged/misrouted vacuum hoses. Before condemning the computerized
system, perform each test listed in this article.
NOTE: Perform all voltage tests with a Digital Volt-Ohmmeter
(DVOM) with a minimum 10-megohm input impedance, unless
stated otherwise in test procedure.
PRELIMINARY INSPECTION & ADJUSTMENTS
VISUAL INSPECTION
Visually inspect all electrical wiring, looking for chafed,
stretched, cut or pinched wiring. Ensure electrical connectors fit
tightly and are not corroded. Ensure vacuum hoses are properly routed
and are not pinched or cut. See M - VACUUM DIAGRAMS article to verify
routing and connections (if necessary). Inspect air induction system
for possible vacuum leaks.
MECHANICAL INSPECTION
Compression
Check engine mechanical condition with a compression gauge,
vacuum gauge, or an engine analyzer. See engine analyzer manual for
specific instructions.
WARNING: DO NOT use ignition switch during compression tests on fuel
injected vehicles. Use a remote starter to crank engine.
Fuel injectors on many models are triggered by ignition
switch during cranking mode, which can create a fire hazard
or contaminate the engine's oiling system.
Check engine compression with engine at normal operating
temperature, all spark plugs removed and throttle wide open. See
COMPRESSION SPECIFICATIONS table.
COMPRESSION SPECIFICATIONS TABLE
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Application (1) Specification
Compression Ratio
1.5L (VIN A) ..................................... 9.0:1
1.8L (VIN C) ..................................... 9.5:1

Page 703 of 1501

MITSUBISHI MONTERO 1998 Service Manual 2.0L
(VIN F) ........................................ 8.5:1
(VIN Y) ........................................ 9.6:1
2.4L (VIN G) ..................................... 9.5:1
3.0L

2.0L
(VIN F) ........................................ 8.5:1
(VIN Y) ........................................ 9.6:1
2.4L (VIN G) ..................................... 9.5:1
3.0L
(VIN H) ........................................ 8.9:1
(VIN J) ....................................... 10.0:1
(VIN K) ........................................ 8.0:1
(VIN P) ........................................ 9.0:1
3.5L (VIN M & P) ................................. 9.0:1
Compression Pressure
1.5L (VIN A) ..................... 192 psi (13.4 kg/cm
)
1.8L (VIN C) ..................... 199 psi (13.9 kg/cm)
2.0L (VIN F) ..................... 178 psi (12.5 kg/cm)
2.0L (VIN Y) ............ 170-225 psi (11.7-15.5 kg/cm)
2.4L (VIN G) ..................... 192 psi (13.4 kg/cm)
3.0L
(VIN H & P) .................... 171 psi (12.0 kg/cm
)
(VIN J) ........................ 185 psi (13.0 kg/cm)
(VIN K) ........................ 156 psi (10.9 kg/cm)
3.5L (VIN M & P) ................. 171 psi (12.0 kg/cm)
Maximum Variation
Between Cylinders ( 2) ............... 14 psi (1.0 kg/cm
)
( 1) - See A - ENGINE/VIN ID article for VIN information.
( 2) - On Eclipse 2.0L non-turbo engine, maximum variation
between cylinders is 25%.
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Exhaust System Backpressure
The exhaust system can be tested with a vacuum or pressure
gauge. If using a pressure gauge, remove HO2S or air injection check
valve (if equipped). Connect a 0-5 psi pressure gauge and run engine
at 2500 RPM. If exhaust system backpressure is greater than 2 psi,
exhaust system or catalytic converter is plugged.
If using a vacuum gauge, connect vacuum gauge hose to intake
manifold vacuum port. Start engine. Observe vacuum gauge. Open
throttle part way and hold steady. If vacuum gauge indication slowly
drops after stabilizing, inspect exhaust system for restriction.
FUEL SYSTEM
* PLEASE READ THIS FIRST *
WARNING: ALWAYS relieve fuel pressure before disconnecting any fuel
injection-related component. DO NOT allow fuel to contact
engine or electrical components.
RELIEVING FUEL PRESSURE
1) On Diamante, disconnect fuel pump harness connector at
fuel tank from underneath vehicle. On Montero and Montero Sport,
remove cargo compartment carpet, remove access plate and disconnect
fuel pump harness connector. On all other models, remove rear seat
cushion, remove access plate (if required) and disconnect fuel pump
harness connector.
2) On all models, start engine. Let engine run until it
stops. Turn ignition off. Disconnect negative battery cable. Connect
fuel pump harness connector. Install rear seat and/or carpet as
necessary.
WARNING: Before disconnecting high pressure fuel hose at fuel

Page 704 of 1501

MITSUBISHI MONTERO 1998 Service Manual delivery pipe, cover fuel hose connection with a rag. Some
residual fuel pressure may still be in system.
FUEL PRESSURE
1) Relieve fuel pressure. See RELIEVING FUE

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