1998 MITSUBISHI MONTERO engine oil

repair or replacement.








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ENGINE OIL CANISTERS
See ENGINE OIL FILTERS AND CANISTERS .
ENGINE OIL COOLERS (EXTERNAL)
ENGINE OIL COOLER (EXTERNAL) INSPECTION








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Condition Code Procedure
Air flow restriction .... A .. 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.
Bypassed ................ A .. Require repair or replacement.
Connection leaking ...... A .. Require repair or replacement.
Corroded ................ 1 .. Suggest repair or replacement.
Fins damaged, affecting
performance ............ A .. Require repair or replacement.
Fins damaged, not
affecting performance .. 2 .. Suggest repair or replacement.
Fluid flow restrictions . A .. Require repair or replacement.
Internal restrictions,
affecting performance .. A .. Require repair or replacement.
Leaking ................. A .. Require repair or replacement.
Missing ................. A ............ Require replacement.
Threads damaged ......... A .. Require repair or replacement.
Threads stripped (threads
missing) ............... A ............ Require replacement.









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ENGINE OIL DRAIN PLUGS AND GASKETS
ENGINE OIL DRAIN PLUG AND GASKET INSPECTION








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Condition Code Procedure
Leaking ................. A .. Require repair or replacement.
Missing ................. C ............ Require replacement.
Threads damaged ......... A ........... ( 1) Require repair or
replacement.
( 1) - Some OEMs require replacement of drain plug gasket when
removing drain plug. Inspect threads in oil pan for damage.









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ENGINE OIL FILTERS AND CANISTERS
ENGINE OIL FILTER AND CANISTER INSPECTION








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Condition Code Procedure
Bulged .................. A ........ ( 1) Require replacement.

Further inspection required.
Canister attaching
hardware broken ........ A ... Require repair or replacement
of hardware.
Canister attaching
hardware loose ......... A ................. Require repair.
Canister attaching
hardware missing ....... C ............ Require replacement.
Canister attaching
hardware not
functioning ............ A ... Require repair or replacement
of hardware.
Center tube collapsed ... A ........ (2) Require replacement.
Further inspection required.
Contaminated ............ A ...... ( 3) Require replacement of
oil and filter.
Dented .................. 2 ........ ( 4) Suggest replacement.
Further inspection required.
Leaking ................. A .. Require repair or replacement.
Maintenance intervals ... 3 ... Suggest replacement to comply
with vehicle's OEM recommended
service intervals.
( 1) - Inspect pressure relief valve.
( 2) - Inspect bypass.
( 3) - Determine cause of contamination, such as engine coolant,
fuel, metal particles, or water when changing oil. Require
repair or replacement.
( 4) - Determine cause, such as broken motor mount.









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ENGINE OIL GASKETS
See ENGINE OIL DRAIN PLUGS AND GASKETS .
ENGINE OIL PRESSURE GAUGES (MECHANICAL)
ENGINE OIL PRESSURE GAUGE (MECHANICAL) INSPECTION








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Condition Code Procedure
Indicates out of range .. B .......... ( 1) Further inspection
required.
Inoperative ............. A .......... ( 2) Further inspection
required.
Leaking ................. A .. Require repair or replacement.
Reads inaccurately ...... 2 .. Suggest repair or replacement.
( 1) - Gauge may indicate problem with contaminated oil, level,
pressure, or temperature, or problem with gauge.
( 2) - Gauge may indicate problem with contaminated oil, level,
pressure, or temperature, or problem with gauge.
Inoperative includes intermittent operation, out of OEM
specification, or out of range. Further inspection
required to determine cause.









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EVAPORATIVE EMISSION (EVAP) CANISTER FILTERS
EVAPORATIVE EMISSION (EVAP) CANISTER FILTER INSPECTION








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Condition Code Procedure

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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IGNITION BOOTS
See
IGNITION WIRES, BOOTS, COIL TOWERS AND TERMINALS (SECONDARY) .
IGNITION COIL TOWERS
See
IGNITION WIRES, BOOTS, COIL TOWERS AND TERMINALS (SECONDARY) .
IGNITION COILS
IGNITION COIL INSPECTION








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Condition Code Procedure
Arcing .................. A ............ Require 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.
Connector broken ........ A .. Require repair or replacement.
Connector (Weatherpack
type) leaking .......... A .. Require repair or replacement.
Connector melted ........ A ........... ( 1) Require repair or

Connector missing ....... A ................. Require repair.
Contaminated ............ A ........... (3) Require repair or
replacement.
Leaking ................. A .. Require repair or replacement.
Malfunctioning .......... A ........... ( 4) Require repair or
replacement.
Missing ................. C ............ Require replacement.
Terminal broken ......... A .. Require repair or replacement.
Terminal burned, affecting
performance ............ A ........... ( 2) 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.
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) - Refer to manufacturer's diagnostic trouble code
procedure and require repair or replacement of affected
component(s).
( 2) - Determine cause and correct prior to repair or
replacement of part.
( 3) - Determine source of contamination, such as engine
coolant, fuel, metal particles, or water. Require
repair or replacement.
( 4) - Includes inoperative, intermittent operation, or failure to
perform all functions.









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IGNITION SWITCHES
See SWITCHES.
IGNITION TERMINALS
See
IGNITION WIRES, BOOTS, COIL TOWERS AND TERMINALS (SECONDARY) .
IGNITION WIRES, BOOTS, COIL TOWERS AND TERMINALS (SECONDARY)
NOTE: You are not required to replace ignition wires in sets.
However, you may suggest replacement of the entire
secondary wire set for preventive maintenance.
IGNITION WIRE, BOOT, COIL TOWER AND TERMINAL (SECONDARY) INSPECTION









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Condition Code Procedure
Application incorrect ... B ............ Require replacement.
Attaching hardware
broken ................. A ... Require repair or replacement
of hardware.

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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OIL PRESSURE SENDING UNITS

service intervals.
Missing ................. C ........ (3) Require replacement.
Noisy ................... 2 .......... ( 4) Further inspection
required.
See note below.
Plies separated ......... A ............ Require replacement.
Tension out of
specification .......... B ........... Require adjustment or
replacement.
Teeth missing ........... A ............ Require replacement.
( 1) - Inspect belt tensioners, pulleys, and cover.
( 2) - Determine cause of incorrect alignment and require repair.
( 3) - CAUTION: Internal engine damage may result from timing
belt damage/failure.
( 4) - Determine cause of noise and suggest repair.









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TORQUE STRUTS
TORQUE STRUT 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.
Binding ................. A ............ Require replacement.
Body dented ............. A .......... ( 1) Further inspection
required.
Body punctured .......... A ............ Require replacement.
Bushing deteriorated,
affecting performance .. A ............ Require replacement.
Bushing deteriorated, not
affecting performance .. .. ........ No service suggested or
required.
Bushings missing ........ C ............ Require replacement.
Bushings separated from
mounting eye ........... 1 ............ Suggest replacement.
Damping (none) .......... A ............ Require replacement.
Leaking oil, enough for
fluid to be running down
the body ............... A ............ Require replacement.
Missing ................. C ............ Require replacement.
Noisy ................... 2 .......... ( 2) Further inspection
required.
Piston rod bent ......... A ............ Require replacement.
Piston rod broken ....... A ............ Require replacement.
Seized .................. A ............ Require replacement.
Threads damaged ......... A .. Require repair or replacement.
Threads stripped (threads
missing) ............... A ............ Require replacement.
( 1) - Require replacement of units where dents restrict strut
piston rod movement. If dents don't restrict movement, no
service is suggested or required.
( 2) - If noise is isolated to shock or strut, suggest replacement.

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

* Load Value (Displayed As Percent)
* Engine Coolant Temperature
* Short Term Fuel Trim (Displayed As Percent)
* Long Term Fuel Trim (Displayed As Percent)
* MAP Vacuum
* Engine RPM
* Vehicle Speed Sensor
* DTC During Data Recording
SELF-DIAGNOSTIC SYSTEM
SERVICE PRECAUTIONS
Before proceeding with diagnosis, following precautions must
be observed:
* Ensure vehicle has a fully charged battery and functional
charging system.
* Visually inspect connectors and circuit wiring being worked
on.
* DO NOT disconnect battery or PCM. This will erase any DTCs
stored in PCM.
* DO NOT cause short circuits when performing electrical tests.
This will set additional DTCs, making diagnosis of original
problem more difficult.
* DO NOT use a test light in place of a voltmeter.
* When checking for spark, ensure coil wire is NOT more than
1/4" from chassis ground. If coil wire is more than 1/4" from
chassis ground, damage to vehicle electronics and/or PCM may
result.
* DO NOT prolong testing of fuel injectors. Engine may
hydrostatically (liquid) lock.
* When a vehicle has multiple DTCs, always repair lowest number
DTC first.
VISUAL INSPECTION
Most driveability problems in the engine control system
result from faulty wiring, poor electrical connections or leaking air
and vacuum hose connections. To avoid unnecessary component testing,
perform a visual inspection before beginning self-diagnostic tests.
ENTERING ON-BOARD DIAGNOSTICS
NOTE: DO NOT skip any steps in self-diagnostic tests or incorrect
diagnosis may result. Ensure self-diagnostic test applies to
vehicle being tested.
DTCs may be retrieved by using a scan tool only. Proceed to
DTC retrieval method.
NOTE: Although other scan tools are available, Mitsubishi
recommends using Multi-Use Tester II (MUT II) scan tool.
Using Scan Tool
1) Refer to manufacturer's operation manual for instructions
in use of scan tool. Before entering on-board diagnostics, see
SERVICE PRECAUTIONS . Locate Data Link Connector (DLC) under instrument
panel, near steering column.
2) Turn ignition switch to OFF position. Connect scan tool to
DLC. Turn ignition switch to ON position. Read and record scan tool
self-diagnostic output. Proceed to TROUBLE CODE DEFINITION.