1998 MITSUBISHI MONTERO check oil

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

of publication.








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MFI CONTROL RELAY
MFI control relay switches power to vehicle sensors and
actuators including Volume Airflow (VAF) sensor, crankshaft position
sensor, idle speed control, injectors and fuel pump. When ignition
switch is turned to RUN position, PCM energizes coils controlling
injectors, VAF sensor and idle air control. When ignition switch is
turned to START position, PCM energizes coils (through park/neutral
position switch on A/T models) to supply power to fuel pump. Relay
failure will cause a no-start condition. For testing procedure, see I
- SYSTEM/COMPONENT TESTS article.
IGNITION CHECKS
* PLEASE READ THIS FIRST *
NOTE: Perform all circuit tests with a Digital Volt-Ohmmeter
(DVOM) with a minimum 10-megohm input impedance, unless
stated otherwise in test procedure.
SPARK
Check for spark at coil wire (if applicable) and at each
spark plug wire using a high output spark tester. Check spark plug
wire resistance on suspect wires. Wire resistance should not exceed
22,000 ohms for all models except Eclipse 2.0L non-turbo and Montero.
On Eclipse 2.0L non-turbo, resistance should not exceed 8000 ohms. On
Montero, resistance should not exceed 26,000 ohms.
CAMSHAFT POSITION (CMP) SENSOR
For CMP sensor testing procedure, see G - TESTS W/CODES
article.
CRANKSHAFT POSITION (CKP) SENSOR
For CKP sensor testing procedure, see G - TESTS W/CODES
article.
DISTRIBUTORLESS IGNITION SYSTEM (DIS - 4-CYLINDER)
Ignition Coil Resistance (Eclipse)
1) On Mirage 1.8L, see POWER TRANSISTOR (MIRAGE). On Eclipse\
2.0L non-turbo, go to step 3). On Eclipse 2.0L turbo and 2.4L,
disconnect ignition coil connector. Go to next step.
2) On Eclipse 2.0L turbo, use DVOM to measure primary coil
resistance between ignition coil connector terminals No. 2 and 3 (coil
for cylinders No. 1 and 4) and terminals No. 1 and 3 (coil for
cylinders No. 2 and 3). See Fig. 3. On Eclipse 2.4L, use DVOM to
measure primary coil resistance Between ignition coil terminals. Go to
step 4).
Fig. 2: Ignition Coil Connector Terminals (Eclipse 2.0L Non-Turbo)
Courtesy of Mitsubishi Motor Sales of America

Measure between center and right terminals of connector for cylinders
No. 1 and 4, and between center and left terminals of connector for
cylinders No. 2 and 3.
4) On all models, remove ignition wires from coil. Measure
secondary coil resistance between coil towers for cylinders No. 1 and
4 and between coil towers for cylinders No. 2 and 3. Primary and
secondary coil resistance should be within specification. See
IGNITION COIL RESISTANCE (ECLIPSE) table. Connect coil harness
connector. Connect ignition wires to coil.
IGNITION COIL RESISTANCE (ECLIPSE) - Ohms @ 68
F (20C) TABLE








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Application Primary Secondary
2.0L
Non-Turbo ............ .51-.61 ......... 11,500-13,500
Turbo ................ .70-.86 ......... 11,300-15,300
2.4L ................... .74-.90 ......... 20,100-27,300









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Power Transistor (Eclipse 2.0L Turbo & 2.4L)
1) To test the section of the power transistor that controls
cylinders No. 1 and 4, disconnect power transistor connector. Using a
1.5-volt dry cell battery, connect negative end of battery to terminal
No. 3 of power transistor and positive end to terminal No. 7. See
Fig. 4 .
Fig. 4: Identifying Power Transistor Connector Terminals (Eclipse
2.0L Turbo & 2.4L)
Courtesy of Mitsubishi Motor Sales of America
2) Using an analog ohmmeter, check for continuity between
terminals No. 3 and 8 of power transistor. Continuity should exist.
With positive end of 1.5-volt battery disconnected, there should be no
continuity. Replace power transistor if it fails test.
3) To test the section of the power transistor that controls
cylinders No. 2 and 3, connect negative end of 1.5-volt dry cell
battery to terminal No. 3 of power transistor and positive end to
terminal No. 2.
4) Using an analog ohmmeter, check for continuity between
terminals No. 1 and 3 of power transistor. Continuity should exist.
With positive end of 1.5-volt battery disconnected, there should be no
continuity. Replace power transistor if it fails test.
Power Transistor (Mirage)
1) Disconnect power transistor (distributor) connector. Usin\
g
a 1.5-volt dry cell battery, connect negative end of battery to
terminal No. 4 of power transistor and positive end to terminal No. 3.
See Fig. 5 .

Fig. 5: Power Transistor Connector Terminals (Mirage 1.8L)
Courtesy of Mitsubishi Motor Sales of America
2) Using an analog ohmmeter, check for continuity between
terminals No. 2 and 3 of power transistor. Continuity should exist.
With positive end of 1.5-volt battery disconnected, there should be no
continuity. Replace power transistor if it fails test.
DISTRIBUTORLESS IGNITION SYSTEM (DIS - V6)
Ignition Coil Resistance
1) On 3000GT DOHC, go to next step. On Montero and Montero
Sport, use DVOM to measure primary coil resistance between each
individual coil. To check secondary coil resistance, measure
resistance between towers of each individual coil. Replace coil if
primary and secondary coil resistances are not within specification.
See IGNITION COIL RESISTANCE (V6) table.
2) Using DVOM, measure primary coil resistance between
terminal No. 3 (power terminal) and each individual coil terminal. See\
Fig. 6 . Terminal No. 1 controls coil "B", terminal No. 2 controls coil
"A", and terminal No. 4 controls coil "C". See Fig. 7. To check
secondary coil resistance, measure resistance between towers of each
individual coil. Replace coil if primary and secondary coil

Fig. 7: Identifying Ignition Coils (3000GT DOHC)
Courtesy of Mitsubishi Motor Sales of America
Power Transistor
1) To test section of power transistor that controls
cylinders No. 1 and 4 of ignition coil, disconnect power transistor
connector. Using a 1.5-volt dry cell battery, connect negative end of
1.5-volt battery to terminal No. 4 of power transistor and positive
end to terminal No. 3. See Fig. 8.
2) Using an analog ohmmeter, check for continuity between
terminals No. 4 and 13 of power transistor. Continuity should exist.
With positive end of 1.5-volt battery disconnected, there should be no
continuity. Replace power transistor if it fails test.
3) To test section of power transistor that controls
cylinders No. 2 and 5 of ignition coil, connect negative end of 1.5-
volt battery to terminal No. 4 of power transistor and positive end to
terminal No. 2.
4) Using an analog ohmmeter, check for continuity between
terminals No. 4 and 12 of power transistor. Continuity should exist.
With positive end of 1.5-volt battery disconnected, there should be no
continuity. Replace power transistor if it fails test.
5) To test section of power transistor that controls
cylinders No. 3 and 6 of ignition coil, connect negative end of 1.5-
volt battery to terminal No. 4 of power transistor and positive end to
terminal No. 1.
6) Using an analog ohmmeter, check for continuity between
terminals No. 4 and 11 of power transistor. Continuity should exist.
With positive end of 1.5-volt battery disconnected, there should be no
continuity. Replace power transistor if it fails test.
Fig. 8: Identifying Power Transistor Terminals
Courtesy of Mitsubishi Motor Sales of America

Fig. 12: Ignition Coil Connectors Terminals (Except DIS - Montero
Sport 2.4L)
Courtesy of Mitsubishi Motor Sales of America
CAUTION: Power transistor test must be performed in less than 10
seconds to prevent coil from burning or power transistor
from breaking.
Power Transistor (Diamante)
1) Disconnect power transistor connector. Using a 1.5-volt
dry cell battery, connect negative end of 1.5-volt battery to terminal
No. 4 of power transistor and positive end to terminal No. 3. See
Fig. 13 .
2) Using an analog ohmmeter, check for continuity between
terminals No. 1 and 4 of power transistor. Continuity should exist.
With positive end of 1.5-volt battery disconnected, there should be no
continuity. Replace power transistor if it fails test.
Power Transistor (Galant)
1) Disconnect power transistor connector. Using a 1.5-volt
dry cell battery, connect negative end of 1.5-volt battery to terminal
No. 5 of power transistor and positive end to terminal No. 6. See
Fig. 14 .
2) Using an analog ohmmeter, check for continuity between
terminals No. 5 and 12 of power transistor. Continuity should exist.
With positive end of 1.5-volt battery disconnected, there should be no
continuity. Replace power transistor if it fails test.
Power Transistor (Mirage)
1) Disconnect power transistor (distributor) connector. Usin\
g
a 1.5-volt dry cell battery, connect negative end of 1.5-volt battery
to terminal No. 4 of power transistor and positive end to terminal No.
3. See Fig. 15.
2) Using an analog ohmmeter, check for continuity between
terminals No. 2 and 4 of power transistor. Continuity should exist.
With positive end of 1.5-volt battery disconnected, there should be no

* 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.

CLEARING DTCS
CAUTION: When battery is disconnected, vehicle computer and memory
systems may lose memory data. Driveability problems may
exist until computer systems have completed a relearn cycle.
To clear DTCs using a scan tool, refer to owners manual
supplied with scan tool. If scan tool is not available, DTCs may also
be cleared by disconnecting negative battery cable or PCM for at least
15 seconds, allowing PCM to clear DTCs. Reconnect negative battery
cable and check for DTCs to confirm repair.
PCM LOCATION
PCM LOCATION TABLE








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Application Location
Montero ........................... Right Front Kick Panel
3000GT ............................. Behind Center Console









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SUMMARY
If no hard DTCs (or only pass DTCs) are present, driveability\
symptoms exist, or intermittent DTCs exist, proceed to H - TESTS W/O
CODES article for diagnosis by symptom (i.e., ROUGH IDLE, NO START,
etc.) or intermittent diagnostic procedures.
TERMINAL IDENTIFICATION
NOTE: The following terminals are shown as viewed from component
side of connector. Vehicles are equipped with different
combinations of components. Not all components are used on
all models. To determine component usage, see appropriate
wiring diagram in L - WIRING DIAGRAMS article.
TERMINAL IDENTIFICATION DIRECTORY TABLE









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Connector See
ASD/Fuel Pump/MFI Relay ...................... Fig. 1 or 2
CKP/CMP Sensor ............................ Fig. 3, 4 or 5
DLC ............................................... Fig. 6
ECT Sensor ........................................ Fig. 7
EVAP Purge Solenoid ............................... Fig. 8
EVAP Vent Solenoid ................................ Fig. 9
Fuel Injector ....................... Fig. 10, 11, 12 or 13
Fuel Pump ................................... Fig. 14 or 15
Fuel Pump Control/Relay Module .................... Fig. 16
FTDP Sensor ...................................... Fig. 17
Generator Field .................................. Fig. 18
HO2S ............................................. Fig. 19
IAC Motor ........................................ Fig. 20
Ignition Coil .......................... Fig. 21, 22 or 23
Ignition Failure Sensor .......................... Fig. 24
Ignition Power Transistor .................. Fig. 25 or 26
KS ............................................... Fig. 27
MDP Sensor ....................................... Fig. 28
PCM .............................................. Fig. 29