1987 MITSUBISHI MONTERO ECU

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Page 2 of 284

MITSUBISHI MONTERO 1987 1.G Workshop Manual 2 INTRODUCTION - How To Use This Manual
HOW TO USE THIS MANUAL NOOBAAK
CONTENTS
The preceding page contains the GROUP INDEX
which lists the group title and group number.
PAGE NUMBERS
All page nu

2 INTRODUCTION - How To Use This Manual
HOW TO USE THIS MANUAL NOOBAAK
CONTENTS
The preceding page contains the GROUP INDEX
which lists the group title and group number.
PAGE NUMBERS
All page numbers consist of two sets of digits
separated by a dash. The digits preceding the dash
identify the number of the group. The digits follow-
ing the dash represent the consecutive page
number within the group. The page numbers can
be found on the top left or right of each page.
TEXT
Unless otherwise specified, each service procedure
covers all models. Procedures covering specific
models are identified by the model codes, or similar
designation (engine type, transmission type, etc.).
A description of these designations is covered in
this unit under “VEHICLE IDENTIFICATION”.
SERVICE PROCEDURES
The service steps are arranged in numerical order
and attentions to be paid in performing vehicle ser-
vice are described in detail in SERVICE POINTS.
DEFINITION OF TERMS
STANDARD VALUE
Indicates the value used as the standard for judging
the quality of a part or assembly on inspection or the
value to which the part or assembly is corrected and
adjusted. It is given by tolerance.
LIMIT
Shows the standard for judging the quality of a part
or assembly on inspection and means the maximum
or minimum value within which the part or assembly
must be kept functionally or in strength. It is a value
established outside the range of standard value. Installation steps
Indicates incidental operation
piiiKL=l-
Removal steps : The numbers before part names
correspond to numbers in the il-
lustration and indicate the order of
removal.
Disassembly steps : The numbers before part
names correspond to numbers
in the illustration, and indicate
the order of disassembly.
This is provided if installation
cannot be made in the reverse
order of “Removal steps”; omit-
ted if installation in the reverse
order of “Removal steps” is
possible.
.
Reassembly steps : I his IS provided It reassembly
cannot be made in the reverse
order of “Disassembly steps”;
omitted if reassembly in the
reverse order of “Disassembly
steps” is possible.
Classification of
SERVICE ROINTS
Oe : Removal
** : Installation
Oe : Disassembly
I)+ : Reassembly

Page 9 of 284

MITSUBISHI MONTERO 1987 1.G Workshop Manual INTRODUCTION - Precautions Before Service 9
nm (in.)
so0059
PARTS
When replacing parts, use MITSUBISHI genuine parts.
VEHICLE WVASHING
If high-pressure car-washing equipment or steam car-washing

Page 12 of 284

MITSUBISHI MONTERO 1987 1.G Workshop Manual 12 INTRODUCTION - Precautions Before Service
(3) If an ammeter or similar instrument is to be connected
to a live-wire circuit, use tape to protect the wire, use a
i clamp to secure the wire, and m

Page 14 of 284

MITSUBISHI MONTERO 1987 1.G Workshop Manual INTRODUCTION - Towing and Hoisting
TOWING AND HOISTING NOOGA-
This vehicle can only be towed from the front with convention-
al sling-type equipment and tow chain with grab hooks.
If a vehicle is

INTRODUCTION - Towing and Hoisting
TOWING AND HOISTING NOOGA-
This vehicle can only be towed from the front with convention-
al sling-type equipment and tow chain with grab hooks.
If a vehicle is towed from the rear, use a tow dolly.
A lumber spacer (4” x 4” x 55” wood beam) should be placed
forward of under guard and under towing hook/shipping tie
down hook.
Then, attach J-hook to the lower arm.
A safety chain system must be used. This system must be
completely independent of the primary lifting and towing
attachment. Care must be taken in the installation of safety
chains to insure they do not cause damage to bumper, painted
surfaces or lights.
LIFT!NG-GROUND CLEARANCE
Towed vehicle should be raised until wheels are a minimum of
10 cm (4 in.) from the ground. Be sure there is adequate
ground clearance at the opposite end of the vehicle, especially
when towing over rough terrain or when crossing sharp rises
such as curbs. If necessary, ground clearance can be in-
creased by removing the wheels from the lifted end of the
disabled vehicle and carrying the lifted end closer to the
ground. A 20 cm (8 in.) ground clearance must be maintained
between brake drums and ground.
FRONT TOWING PICKUP
The vehicle may be towed on its rear wheels for extended
distances, provided the parking brake is released.
Make cartain the transmission remains in “NEUTRAL”.
SAFETY PRECAUTIONS
The following precautions should be taken when towing the
vehicle.
1. Remove exhaust tips and any other optional equipment,
that interface with the towing sling. Padding (heavy shop
towel or carpeting) should be placed between the towing
sling cross bar and any painted surfaces, and bumper
surfaces.
2. A safety chain system completely independent of the
primary lifting and towing attachment must be used.
3. Any loose or protruding parts of damaged vehicle such as
hoods, doors, fenders, trim, etc., should be secured prior
to moving the vehicle.
4. Operator should refrain from going under a vehicle unless
the vehicle is adequately supported by safety stands.
5. Never allow passengers to ride in a towed vehicle.
6. State and local rules and regulations must be followed
when towing a vehicle.
1 STB Revision
‘

Page 29 of 284

MITSUBISHI MONTERO 1987 1.G Workshop Manual INSPECTION OF HARNESS CONNECTOR - Inspection of Harness Connector 8-9
Connect to
harness
16UO500
16R1317
8; 4 16R1319
INSPECTION OF HARNESS
CONNECTOR
NOECAM
CONTINUITY AND VOLTAGE TEST FOR CO

Page 38 of 284

MITSUBISHI MONTERO 1987 1.G Workshop Manual WIRING HARNESS - Troubleshooting
1660236
Power
supply
h
Fuse
ON
/----
/
/
Motor
1660239
CHECKING CABLES AND WIRES
1. Check connections for looseness, rust and stains.
2. Check terminals

WIRING HARNESS - Troubleshooting
1660236
Power
supply
h
Fuse
ON
/----
/
/
Motor
1660239
CHECKING CABLES AND WIRES
1. Check connections for looseness, rust and stains.
2. Check terminals and wires for corrosion by battery electrolyte,
$tc.
3. Check terminals and wires for open circuit or impending open
circuit.
4. Check wire insulation and coating for damage, cracks and de-
grading.
5. Check conductive parts of terminals for contact with other
metallic parts (vehicle body and other parts).
6. Check grounding parts to verify that there is complete conti-
nuity between attaching bolt(s) and vehicle body.
7. Check for incorrect wiring.
8. Check that wirings are so clamped as to ‘prevent contact with
sharp corners of the vehicle body, etc. or hot parts (exhaust
manifold, pipe, etc.).
9. Check that wirings are clamped firmly to secure enough clear-
ance from the fan pulley, fan belt and other rotating or moving
parts.
10. Check that the wirings between the fixed parts such as the
vehicle body and the vibrating parts such as the engine are
made with adequate allowance for vibrations.
HANDLING ON-VEHICLE BAlTERY
When checking or servicing does not require power from the on-
vehicle battery, be sure to disconnect the cable from the battery
(-)terminal. This is to prevent problems that could be caused by
shorting of the circuit. Disconnect the (-) terminal first and recon-
nect it last.
TROUBLESHOOTING
A circuit consists of the power supply, switch, relay, load, ground,
etc. There are various methods to check a circuit including an
overall check, voltage check, shortcircuit check and continuity
check. Each of these methods is briefly described in the following.
1. Voltage check
(1) Ground one lead wire of the test light. If a voltmeter is
used instead of the test light, ground the grounding
side lead wire.
(2) Connect the other lead wire of the test light to the
power side terminal of the connector 0. The test light
should come on or the voltmeter should indicate a
voltage.
(3) Then, connect the test light or voltmeter to the
connector (3,. The test light should not come on, or the
voltmeter should indicate no voltage. When the switch
is turned on in this state, the test light should come on,
or the voltmeter should indicate a voltage, with the
motor starting to run.
(4) The circuit illustrated here is normal but if there is any
problem such as the motor failing to run, check
voltages beginning at the connector nearest to the
motor unit the faulty part is identified. 1 ST6 Revision

Page 98 of 284

MITSUBISHI MONTERO 1987 1.G Workshop Manual 8-78 CHARGING SYSTEM - Service Adiustment Procedures
80A
n
Relay with diode
Voltmeter
Ammeter Iad
176
OUTPUT CURRENT TEST
This test judges whether or not the alternator gives an output
curren

8-78 CHARGING SYSTEM - Service Adiustment Procedures
80A
n
Relay with diode
Voltmeter
Ammeter Iad
176
OUTPUT CURRENT TEST
This test judges whether or not the alternator gives an output
current that is equivalent to the nominal output.
Preparation
(1) Prior to the test, check the following items and correct as
necessary.
(a) Check the battery installed in the vehicle to ensure that it
is in sound state*. The battery checking method is de-
scribed in “BATTERY”.
NOTE
*The battery that is used to test the output current should
be one that has been rather discharged. With a fully
charged battery, the test may not be conducted correctly
due to an insufficient load.
(b) Check tension of the alternator drive belt. The belt tension
check method is described in “GROUP 7 COOLING -
Service Adjustment Procedures”.
(2) Turn off the ignition switch.
(3) Disconnect the battery ground cable.
(4) Disconnect the alternator output wire from the alternator “B”
terminal.
(5) Connect a DC ammeter (0 to 100 A) in series between the “B”
terminal and the disconnected output wire. Connect the (+)
lead of the ammeter to the “B” terminal and connect the (-)
lead wire to the disconnected output wire.
NOTE
Tighten each connection by bolt and nut securely as a heavy
current will flow. Do not relay on clips.
(6) Connect a voltmeter (0 to 20 V) between the “B” terminal and
ground. Connect the (+) lead wire to the alternator “B” ter-
minal and (-) lead wire to a sound ground.
(7) Set the engine tachometer and connect the battery ground
cable.
(8) Leave the engine hood open.
Test
(1) Check to see that the voltmeter reads the same value as the
battery voltage.
If the voltmeter reads 0 V, an open circuit in the wire between
the alternator “B” terminal and battery (-) terminal, a blown
fusible link or poor grounding is suspected.
(2) Turn on the headlight switch and start the engine.
(3) Set the headlight at high beam and the heater blower switch
at HIGH, quickly increase the engine speed to 2500 rpm and
read the maximum output current value indicated by the am-
meter.
NOTE
After the engine start up, the charging current quickly drops.
therefore, above operation must be done quickly to read max-
imum current value correctly.
[ STB Revision
--I

Page 101 of 284

MITSUBISHI MONTERO 1987 1.G Workshop Manual CHARGING SYSTEM - Service Adjustment Procedures 8-81
(2) Upon completion of the test, set the engine speed at idle and
turn off the ignition switch.
(3) Disconnect the battery ground cable.
(4) Re

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