1991 MITSUBISHI MONTERO mileage

open bonnet brake rotor towing capacity trunk release ECO mode wiring

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$MITSUBISHI MONTERO 1991 Service Manual Replace A/T Fluid 30,000 Miles \ \b\ \b\ \ \$

Replace A/T Fluid 30,000 Miles

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Replace M/T Fluid 30,000 Miles

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Replace Transfer 30,000 Miles

Case Fluid

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1) - Perform these services at the mileage or number of months

(since the last time), whichever comes first.

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NORMAL MAINTENANCE SERVICE SCHEDULES
The following service schedules refer to vehicles driven
under normal operating conditions. For vehicles driven under severe
conditions, additional services may be necessary. See
SEVERE SERVICE REQUIREMENTS (PERFORM W/SERVICE SCHEDULES) above in
this article for additional service requirements.
7500 MILE (12,000 KM) SERVICE
7500 MILE (12,000 KM) SERVICE\
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Service Or Inspect

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Change Engine Oil

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Lubrication Specifications

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Application Specification

Engine Oil (
1)

Minimum Temperature

Greater Than 32
F (0
C) ...... SAE 20W-40 Or 20W-50 API SG/CD

Greater Than -10
F (-23
C) ..... SAE 10W-30, 10W-40 API SG/CD

Maximum Temperature

Less Than 60
F (16
C) .......... SAE 5W-30 Or 5W-40 API SG/CD

(
1) - Since temperature ranges for different oil grades overlap,

brief fluctuations in outside temperatures are no cause for

concern.

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Fluid Capacities

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Application Quantity

Engine Oil

1987 ......................................... 5.2 Qts. (5.0L)

1988 ......................................... 5.0 Qts. (4.8L)

1989-92 ...................................... 5.5 Qts. (5.3L)

1993-95 ...................................... 5.2 Qts. (4.9L)

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15,000 MILE (24,000 KM) SERVICE
15,000 MILE (24,000 KM) SERVICE\
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Service Or Inspect

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Verify Last Major Service Was Performed

Page 1138 of 1333

$MITSUBISHI MONTERO 1991 Service Manual \003 H - T E STS W /O C O DES 1991 M it s u bis h i M onte ro 1991 ENGINE PERFORMANCE Trouble Shooting - No Codes Chrysler Motors: Colt, Colt 200, Colt Vista, Ram-$

\003
H - T E STS W /O C O DES

1991 M it s u bis h i M onte ro
1991 ENGINE PERFORMANCE
Trouble Shooting - No Codes
Chrysler Motors: Colt, Colt 200, Colt Vista, Ram-50, Stealth,
Summit,
Mitsubishi: Eclipse, Galant, Mirage, Montero, Pickup, 3000GT
INTRODUCTION
Before diagnosing symptoms or intermittent faults, perform
steps in F - BASIC TESTING and G - TESTS W/ CODES articles in the
ENGINE PERFORMANCE Section. Use this article to diagnose driveability
problems that exist when a hard fault code is NOT found, or on vehicle
NOT equipped with a self-diagnostic system.
NOTE: Computer control unit has been revised to correct certain
driveability problems. Check with manufacturer for latest
computer application.
Symptom checks are intended to direct technician to
malfunctioning component(s) so further diagnosis may be performed. A
symptom should lead to specific component or system testing, or an
adjustment specification.
Use intermittent test procedures to locate driveability
problems that DO NOT occur when vehicle is being tested. These test
procedures should also be used if a soft (intermittent) trouble code
was present, but no problem was found during self-diagnostic testing.
NOTE: For specific testing procedures, see I - SYS/COMP TESTS
article in the ENGINE PERFORMANCE Section. For
specifications, see C - SPECIFICATIONS or D - ADJUSTMENTS
article in the ENGINE PERFORMANCE Section.
SYMPTOMS
SYMPTOM DIAGNOSIS
Symptom checks cannot be used unless problem occurs while
vehicle is being tested. Symptoms available for diagnosis include the
following:
* Difficult to start/no start (cranks okay)
* Rough or unstable idle
* Engine hesitates or poor acceleration
* Engine surges
* Detonation or knocking
* Poor fuel mileage
SYMPTOMS (PFI)
DIFFICULT TO START/NO START (CRANKS OKAY)
* Check idle speed control servo (if applicable).
* Check stepper motor (if applicable).
* Check ignition switch.
* Check TDC sensor.
* Check crank angle sensor.
* Check inhibitor switch (A/T).

Page 1140 of 1333

MITSUBISHI MONTERO 1991 Service Manual * Check motor position sensor (if applicable).
* Check fuel pressure.
* Check for disconnected or damaged vacuum hoses.
* Check for PFI system malfunction.
* Che

* Check motor position sensor (if applicable).
* Check fuel pressure.
* Check for disconnected or damaged vacuum hoses.
* Check for PFI system malfunction.
* Check for stepper motor malfunction (if applicable).
* Check for fuel injector malfunction.
* Check for power transistor malfunction.
* Check for A/C power relay control system malfunction (if
applicable).
* Check for ECU malfunction.
* Ensure electrical harness, connectors and wires are not
broken or loose.
ENGINE SURGES
* Check coolant temperature sensor.
* Check idle position switch.
* Check EGR control solenoid valve (if applicable).
* Check fuel pressure.
* Check for fuel injector malfunction.
DETONATION OR KNOCKING
* Check airflow sensor.
* Check for cooling system problems.
* Check fuel quality.
* Check intake air temperature sensor.
* Check barometric pressure sensor.
* Check ignition coil.
* Check power transistor.
* Check for EGR system malfunction.
POOR FUEL MILEAGE
* Check intake air temperature sensor.
* Check engine coolant temperature sensor.
* Check barometric pressure sensor.
* Check ignition switch.
* Check idle position switch.
* Check throttle position sensor.
* Check TDC sensor.
* Check crank angle sensor.
* Check power steering oil pressure switch.
* Check A/C switch (if applicable).
* Check inhibitor switch (A/T).
* Check oxygen sensor.
* Check airflow sensor.
* Check motor position sensor (if applicable).
* Check fuel pressure.
* Check for PFI system malfunction.
* Check for stepper motor malfunction.
* Check for fuel injector malfunction.
* Check for power transistor malfunction.
INTERMITTENTS
INTERMITTENT PROBLEM DIAGNOSIS
Intermittent fault testing requires duplicating circuit or
component failure to identify problem. These procedures may lead to
computer setting a fault code which may help in diagnosis.
If problem vehicle does not produce fault codes, monitor

Page 1230 of 1333

MITSUBISHI MONTERO 1991 Service Manual setting, see ENGINE
PERFORMANCE
Vacuum leak Eliminate vacuum leak

setting, see ENGINE
PERFORMANCE
Vacuum leak Eliminate vacuum leak
EGR valve malfunction Replace EGR valve
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Poor Gasoline Cracked or broken vacuum Replace vacuum hoses
Mileage hoses
Vacuum leaks Repair vacuum leaks
Defective ignition wires Replace wires
Incorrect choke setting Readjust setting, see
ENGINE PERFORMANCE
Defective vacuum advance Replace vacuum advance
Defective spark plugs Replace spark plugs
Binding carburetor power Eliminate binding
piston
Dirt in carburetor jets Clean and/or replace
jets
Incorrect float adjustment Readjust float
setting, see FUEL
Defective power valve Replace power valve,
see ENGINE PERFORMANCE
Incorrect idle speed Readjust idle speed
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Engine Stalls Improper float level Readjust float level
Leaking needle valve and Replace needle valve
seat and seat
Vacuum leaks Eliminate vacuum
leaks
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VACUUM PUMP - DIESEL TROUBLE SHOOTING
NOTE: This is GENERAL information. This article is not intended
to be specific to any unique situation or individual vehicle
configuration. The purpose of this Trouble Shooting
information is to provide a list of common causes to
problem symptoms. For model-specific Trouble Shooting,
refer to SUBJECT, DIAGNOSTIC, or TESTING articles available
in the section(s) you are accessing.
NOTE: Diesel engines mechanical diagnosis is the same as gasoline
engines for items such as noisy valves, bearings, pistons,
etc. The following trouble shooting covers only items
pertaining to diesel engines.
VACUUM PUMP (DIESEL) TROUBLE SHOOTING CHART
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CONDITION POSSIBLE CAUSE CORRECTION\
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