ignition MITSUBISHI MONTERO 1998 Service Manual
Page 707 of 1501
Fig. 3: Ignition Coil Connector Terminals (Eclipse 2.0L Turbo)
Courtesy of Mitsubishi Motor Sales of America
3) Disconnect ignition coil connector. Using DVOM, measure
primary coil resistance at coil (component side) 3-pin connector.
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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 .
Page 709 of 1501
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
Page 710 of 1501
resistances are not within specification. See
IGNITION COIL RESISTANCE (V6) table.
IGNITION COIL RESISTANCE (V6) - Ohms @ 68
F (20C) TABLE \
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Application Primary Secondary
3.0L
VIN J & K ............ .67-.81 ......... 11,300-15,300
VIN P ................ .74-.90 ......... 20,100-27,300
3.5L (VIN M) ........... .74-.90 ......... 20,100-27,300
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Fig. 6: Identifying Ignition Coil Terminals (3000GT DOHC)
Courtesy of Mitsubishi Motor Sales of America
Page 711 of 1501
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
Page 712 of 1501
HALL EFFECT IGNITION
Ignition Coil Resistance
Using a DVOM, measure primary coil resistance between
specified coil terminals. See Figs. 9-12. On Galant, measure between
terminals No. 11 and 12. On Mirage measure between terminals No. 1 and
2. On all other vehicles, measure between positive and negative
terminals. Measure secondary coil resistance between coil positive
terminal and ignition coil tower. Primary and secondary coil
resistance should be within specification. See
IGNITION COIL RESISTANCE TABLE .
IGNITION COIL RESISTANCE TABLE - Ohms @ 68
F (20C) \
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Application Primary Secondary
1.5L (VIN A) ........... .50-.70 ......... 15,000-22,000
2.4L (VIN G)
Galant .............. .90-1.20 ......... 20,000-29,000
Montero Sport ........ .67-.81 ......... 11,300-15,300
3.0L (VIN H) ........... .72-.88 ......... 12,290-13,920
3.5L (VIN P) ........... .50-.70 ........... 9000-13,000
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Fig. 9: Ignition Coil Connectors Terminals (Except DIS - Diamante)
Courtesy of Mitsubishi Motor Sales of America
Page 713 of 1501
Fig. 10: Ignition Coil Connectors Terminals (Except DIS - Galant)
Courtesy of Mitsubishi Motor Sales of America
Fig. 11: Ignition Coil Connectors Terminals (Except DIS - Mirage
1.5L)
Courtesy of Mitsubishi Motor Sales of America
Page 714 of 1501
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
Page 716 of 1501
IDLE SPEED & IGNITION TIMING
Ensure idle speed and ignition timing are set to
specification. See IGNITION TIMING SPECIFICATIONS table. For
adjustment procedures, see D - ADJUSTMENTS article.
IGNITION TIMING SPECIFICATIONS (Degrees BTDC @ RPM) TABLE
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Application ( 1) Base ( 2) ( 3) ( 4) Actual
1.5L ........... 2-78@ 650-750 ............ 10 @ 600-800
1.8L ........... 2-8 @ 600-800 ............. 5 @ 600-800
2.0L
Non-Turbo ......... ( 5) .......................... ( 5)
Turbo ........ 2-8 @ 650-850 ............. 8 @ 650-850
2.4L ........... 2-8 @ 650-850 ............ 10 @ 650-850
3.0L ........... 2-8 @ 600-800 ............ 15 @ 600-800
3.5L ........... 2-8 @ 600-800 ............ 15 @ 600-800
( 1) - With ignition timing adjustment connector grounded or
vacuum hose (farthest from distributor) disconnected.
( 2) - With ignition timing adjustment connector ungrounded
or vacuum hose (farthest from distributor) connected.
( 3) - If vehicle altitude is more than 2300 feet above sea
level, actual timing may be advanced (5 degrees).
( 4) - Actual ignition timing is approximate and may
fluctuate plus or minus 7 degrees.
( 5) - Ignition timing is NOT adjustable.
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SUMMARY
If no faults were found while performing BASIC DIAGNOSTIC
PROCEDURES, proceed to G - TESTS W/CODES article. If no hard codes are
found in self-diagnostics, proceed to H - TESTS W/O CODES article for
diagnosis by symptom (i.e., ROUGH IDLE, NO START, etc.) or
intermittent diagnostic procedures.
Page 718 of 1501
G - TESTS W/CODES
1998 Mitsubishi Montero
1998 ENGINE PERFORMANCE
Mitsubishi - Self-Diagnostics
Montero & 3000GT
INTRODUCTION
* PLEASE READ THIS FIRST *
NOTE: If no faults were found while performing basic diagnostic
procedures in F - BASIC TESTING article, proceed with
self-diagnostics in this article. If no Diagnostic Trouble
Codes (DTCs) or only pass codes are present after entering
self-diagnostics, proceed to H - TESTS W/O CODES article for
diagnosis by symptom (i.e., ROUGH IDLE, NO START, etc.).
SYSTEM DIAGNOSIS
NOTE: PCM diagnostic memory is retained by direct power supply
from battery. Memory is not erased by turning off ignition,
but it will be erased if battery or PCM is disconnected.
System diagnosis can be accomplished using a scan tool. See
ENTERING ON-BOARD DIAGNOSTICS . Powertrain Control Module (PCM)
monitors several different engine control system circuits. If an
abnormal input signal occurs, a Diagnostic Trouble Code (DTC) is
stored in PCM memory and assigned a DTC number. Each circuit has its
own DTC number and message. A specific DTC indicates a particular
system failure, but does not indicate that cause of failure is
necessarily within system.
A DTC does not condemn any specific component; it simply
points out a probable malfunctioning area. If a DTC is set, PCM will
turn on MIL. System failures encountered are identified as either hard
failures or intermittent failures as determined by PCM.
Hard Failures
Hard failures cause MIL to come on and remain on until
failure is repaired. If MIL comes on and remains on (MIL may flash)
during vehicle operation, cause of failure may be determined by using
appropriate DTC diagnostic procedure. See TROUBLE CODE DEFINITION. If
a sensor fails, PCM will use a substitute value in its calculations to
continue engine operation. In this condition (limp-in mode), vehicle
is functional, but loss of good driveability may result.
Intermittent Failures
Intermittent failures may cause MIL to flicker, or come on
and go out after intermittent DTC goes away. However, corresponding
DTC will be retained in PCM memory. If related DTC does not reoccur
within a certain time frame, related DTC will be erased from PCM
memory. Intermittent failures may be caused by a sensor, connector or
wiring problems. See INTERMITTENTS in H - TESTS W/O CODES article.
The PCM also records and stores engine operating conditions
when malfunction occurred. This information is referred to as freeze
frame data. If malfunction is an engine misfire, or fuel system rich
or fuel system lean condition, freeze frame data will be updated with
the most current information regarding these failures. Freeze frame
data recorded is:
* Fuel System Status