ECU MITSUBISHI MONTERO 1989 1.G Workshop Manual

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INTRODUCTION AND MASTER TROUBLESHOOTING - How To Use This Manual
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HOW TO USE THIS MANUAL
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NWS&Wl g-
LIMIT g&i-
s : CONTENTS
Shows the standard for judging the quality of a part
or assembly on inspection and means the maxi- g ’
mum or minimum value within which the part or
ar-=
assembly must be-kept functionally or in strength. s
m.
It is a value established outside the range of
E-
standard value. z 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”.
TROUBLESHOOTING
Troubleshootings are classified into master trouble-
shooting and group troubleshooting and located as
follows:
The master troubleshooting is prepared when the
trouble symptom relates to two or more groups and
given in MASTER TROUBLESHOOTING.
The group troubleshooting guide is prepared for
causes of problems related to that individual group
only; a troubleshooting guide is prepared for each
appropriate group.
SERVICE PROCEDURES
The sewice 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.
incidental operation
rformed before re-
Removal steps : The numbers before part names b
correspond to numbers in the il-
lustration and indicate the order of
removal.
Disassemblv steos : The numbers before oat-t
I ---I-- names co&pond to num6&
in the illustration, and indicate
the order of’disassembly.
Installation steps : 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 : This is provided if reassembly
cannot be made in the reverse
order of “Disassembly steps”:
omitted if reassembly in the
reverse order
The following abbreviations are used in this manual for classification of model types.
M/T : Indicates the manual transmission, or models equipped with the manual transmission.
A/T : Indicates the automatic transmission, or models equipped with the automatic transmission.
F.B.C. : Indicates the feed back carburetor, or engines equipped with the feed back carburetor.
M.P.I. : Indicates the multi-point injection, or engines equipped witkthe multi-point injection.
2.6 L Engine : Indicates the 2.6 liters (155.9 cuin.) engine, or a model equipped with such an engine.
3.0 L Engine : Indicates the 3.0 liters (181.4 cu.in.) engine, or a model equipped with such an engine.

10 INTRODUCTION AND MASTER TROUBLESHOOTiNG - Precautions Before Service
F1617
WIRING HARNESSES
1. Secure the wiring harnesses by using clamps. However,
for any harness which passes to the engine or other
vibrating parts of the vehicle, allow some slack within a
range that does not allow the engine vibrations to cause
the harness to come into contact with any of the
surrounding parts.
Then secure the harness by using a clamp.
In addition, if a mounting indication mark (yellow tape) is
on a harness, secure the indication mark in the specified
location.
2. If any section of a wiring harness contacts the edge of a
part, or a corner, wrap the section of the harness with tape
or something similar in order to protect it from damage.
3. When disconnecting a connector, be sure to pull only the
connector, not the harness.
4. Disconnect connectors which have catches by pressing in
the direction
indicated by the arrows in the illustration.

12 INTRODUCTION AND MASTER TROUBLESHOOTING - Precautions Before Service
Nominal
size
0.3 mm2
0.5 mm2
0.85 mm*
1.25 mm2
2.0 mm*
3.0 mm2
5.0 mm2 Permissible current
SAE
I
Other
areas
2. If additional optional equipment is to be installed in the
vehicle, follow the procedure listed in the appropriate
instruction manual; however, be sure to pay careful
attention to the following points:
(1) In order to avoid overloading the wiring, take the
electrical current load of the optional equipment into
consideration, and determine the appropriate wire size.
(2) Where possible, route the wiring through the existing
harnesses.
(3) If an ammeter or similar instrument is to be connected
to a live-wire circuit, use tape to protect the wire, use a
clamp to secure the wire, and make sure that there is
no contactwith any other parts.
(4) Be sure to provide a fuse for the load circuit of the
optional equipment.
TUBES AND OTHER RUBBER PARTS
Be careful to avoid spilling any gasoline, oil, etc., or rubber
parts, they might be adversely affected.
LUBRICANTS
In accordance with the instructions in this Service Manual,
apply the specified lubricants in the specified locations during
assembly and installation.
BRAKE FLUID
Be careful to avoid spilling any brake fluid on painted
surfaces, because the paint coat might be discolored or
damaged.

INTRODUCTION AND MASTER TROUBLESHOOTING - Towing and Hoisting 17
TOWING AND HOISTING
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.
LIFTING-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 TSB Revision

INTRODUCTION MASTER TROUBLESHOOTING - Master Troubleshootha
POOR RETURN OF STEERING WHEEL TO CENTER
Symptom Probable cause Reference
page or remedy
Poor return of steering
wheel to center improper front wheel alignment 2-13
Improper tire pressure 22-2
Damaged front wheel bearing 2-21
POOR RIDING
Probable cause Reference
page or remedy
Poor riding Impropertire pressure
lmbalanced wheels 22-2
22-4
1 Improper front or rear wheel alignment 1 2-13.17-3.6
1 Malfunctioning shock absorber 1 2-27,174.a
1 Broken or worn stabilizer
1 Broken or worn torsion bar spring j 2-36
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Loose suspension securing bolt(s) Retighten
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1 Worn lower arm bushing / 231
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ABNORMAL TIRE WEAR
Symptom Probable cause Reference
page or remedy
Abnormal tire wear Improper front or rear wheel alignment 2-l 3,17-3.6
Improper tire pressure 22-2
lmbalanced wheels 22-4
Loose wheel bearings 2-19
Malfunctioning shock absorber 2-27. 174.8
ROAD WANDER
Symptom Probable cause Reference
page or remedy
Road wander z Improper front or rear wheel alignment 2-13. 17-3,6
Excessive play of steering wheel 19-6
Poor turning resistance of upper ball joint ~ 2-27
Improper tire pressure 22-2
/ Loose or worn lower arm or upper arm bushing 2-28.31
Loose or worn wheel bearinas
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[ TSB Revision
I 2-19
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