1991 MITSUBISHI MONTERO oil pressure

IN STR UM EN T P A N EL

1991 M it s u bis h i M onte ro
1991 ACCESSORIES & SAFETY EQUIPMENT
Chrysler Motors/Mitsubishi Switches & Instrument Panels
Dodge; Ram-50
Mitsubishi: Montero, Pickup
DESCRIPTION & OPERATION
Instrument cluster includes speedometer, fuel gauge and
temperature gauge. Fuel gauge has a built-in voltage limiter to keep
voltage supply to gauges at 7 volts. Some models may also have a
shunt-type ammeter, oil pressure gauge, tachometer, voltmeter and/or
turbo boost pressure gauge. Oil pressure gauge uses full battery
voltage. The tachometer operates by pulse feed.
TROUBLE SHOOTING
FUEL/TEMPERATURE GAUGE NOT WORKING
Check for blown fuse, faulty voltage limiter or faulty relay.
Ensure sending unit connections are clean and tight. Test sending unit
for correct operation. Tighten connections in instrument cluster.
SPEEDOMETER NOT WORKING
Ensure speedometer cable is properly connected and correctly
routed. If speedometer pointer and/or odometer still do not work,
replace speedometer as an assembly.
TACHOMETER NOT WORKING
Tachometer is serviced as an assembly. If wiring harness is
okay, replace tachometer assembly.
WARNING LIGHTS NOT WORKING
Test for defective sending unit, burned out bulb, or broken
printed circuit. Ensure all wire connections are clean and tight.
TESTING
FUEL TANK SENDING UNIT
Resistance Test
Remove fuel tank sending unit from fuel tank. Measure
resistance between appropriate terminals with fuel float in Full and
Empty positions. See Fig. 1. Compare resistance reading to
FUEL TANK SENDING UNIT RESISTANCE SPECIFICATIONS table. If resistance
is not to specifications, replace fuel tank sending unit.
FUEL TANK SENDING UNIT RESISTANCE SPECIFICATIONS TABLE









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Application Empty Full
All Models ........... 103-117 ................ 1-5









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OIL PRESSURE GAUGE
Circuit Test
Disconnect oil pressure gauge wiring connector from sending
unit inside the engine compartment. Connect a 12-volt test light
between harness connector terminal and ground. Turn ignition on, but
DO NOT start engine. If test light comes on and gauge needle moves, go
to GAUGE RESISTANCE TEST. If test light does not come on and gauge
needle does not move, repair wiring to sending unit.
Gauge Resistance Test
Remove instrument cluster from instrument panel. See
INSTRUMENT CLUSTER under REMOVAL & INSTALLATION. Check continuity
between oil pressure gauge terminals. See Fig. 4 or Fig. 5. See
OIL PRESSURE GAUGE RESISTANCE SPECIFICATIONS table. If resistance is
not within specification, replace oil pressure gauge.
OIL PRESSURE GAUGE RESISTANCE SPECIFICATIONS TABLE









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Application Ohms
Montero ...................................... 50
Pickup & Ram-50 ........................... 37-47









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Fig. 4: Oil Pressure Gauge Test Terminal ID (Pickup & Ram-50)
Courtesy of Chrysler Motors

Fig. 5: Oil Pressure Gauge Test Terminal ID (Montero)
Courtesy of Chrysler Motors
REED SWITCH
Continuity Check (Except Pickup & Ram-50)
Remove instrument cluster. See INSTRUMENT CLUSTER under
REMOVAL & INSTALLATION. Check continuity between reed switch terminals
No. 1 and 2. See Fig. 6. Ensure continuity pulses on and off 4 times
per revolution of speedometer shaft connection. If continuity is not
as specified, replace reed switch.
Fig. 6: Identifying Reed Switch Test Terminals (Montero)
Courtesy of Mitsubishi Motor Sales of America.
SPEEDOMETER

1994-96 (3.0L DOHC & 3.5L) .................. 9.0 Qts. (8.5L)
Cooling System
1983-88 ..................................... 8.5 Qts. (8.0L)
1989-96
2.6L ....................................... 9.7 Qts. (9.2L)
3.0L ...................................... 10.0 Qts. (9.5L)
3.5L ...................................... 10.0 Qts. (9.5L)
Differential
1983-88 ..................................... 1.9 Qts. (1.8L)
1989-93
2.6L ....................................... 1.9 Qts. (1.8L)
3.0L ....................................... 2.7 Qts. (2.6L)
1994-96
3.0L & 3.5L ................................ 2.7 Qts. (2.6L)
Engine Oil
1983-86 ..................................... 6.0 Qts. (5.8L)
1987 ........................................ 5.2 Qts. (5.0L)
1988 ........................................ 5.0 Qts. (4.8L)
1989-91 ..................................... 5.5 Qts. (5.3L)
1992-96 ..................................... 5.2 Qts. (4.9L)
Power Steering ................................ 1.1 Qts. (1.0L)
Fuel Tank
1983-88 .................................... 15.9 Gals. (60L)
1989-90
2.6L 2-Door ............................... 15.9 Gals. (60L)
3.0L 2-Door ............................... 19.9 Gals. (75L)
2.6L & 3.0L 4-Door .......................... 24 Gals. (92L)
1991-96 ...................................... 24 Gals. (92L)
Manual Transmission
1983-91 ..................................... 2.3 Qts. (2.2L)
1992 ........................................ 2.4 Qts. (2.3L)
1993-96 ..................................... 2.6 Qts. (2.5L)
Transfer Case
1983-91 ..................................... 2.3 Qts. (2.2L)
1992-96 ..................................... 2.4 Qts. (2.3L)
(1) - Use of R12 in a R134a system will result in SEVERE DAMAGE.
( 2) - 1983 model equipped with manual transmission only.









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WHEEL & TIRE SPECIFICATIONS
Tire specifications are imprinted on the tire side wall. The
recommended cold tire inflation pressures are listed on a label
attached to the rear face of the driver's door. These pressures
provide the best combination of ride comfort, tire wear and stability
under normal conditions.
CAUTION: DO NOT mix tires of different design such as radial ply
with bias or bias-belted tires. Mixing tire types will
adversely affect road handling and may lead to loss of
vehicle control. When using snow tires, they must be used
in set of four for maneuverability and safety. DO NOT use
tire chains on front wheels.
TIRE & WHEEL SPECIFICATIONS TABLE









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Wheel Size Tire Size
1983-86
15 x 6JJ (Steel) .............................. 215 SR15
1987-88

CATALYTIC CONVERTER
Continued operation of vehicle with a severe malfunction
could cause converter to overheat, resulting in possible damage to
converter and vehicle.
COOLANT (PROPYLENE-GLYCOL FORMULATIONS)
CAUTION: To avoid possible damage to vehicle use only ethylene-glycol
based coolants with a mixture ratio from 44-68% anti-freeze.
DO NOT use 100% anti-freeze as it will cause the formation
of cooling system deposits. This results in coolant
temperatures of over 300
\b F (149\bC) which can melt plastics.
100% anti-freeze has a freeze point of only -8\b F (-22\bC).
CAUTION: Propylene-Glycol Mixtures has a smaller temperature range
than Ethylene-Glycol. The temperature range (freeze-boil)
of a 50/50 Anti-Freeze/Water Mix is as follows:
Propylene-Glycol -26
\b F (-32\bC) - 257\b F (125\bC)
Ethylene-Glycol -35\b F (-37\bC) - 263\b F (128\bC)
CAUTION: Propylene-Glycol/Ethylene-Glycol Mixtures can cause the
destabilization of various corrosion inhibitors. Also
Propylene-Glycol/Ethylene-Glycol has a different specific
gravity than Ethylene-Glycol coolant, which will result in
inaccurate freeze point calculations.
ELECTROSTATIC DISCHARGE SENSITIVE (ESD) PARTS
WARNING: Many solid state electrical components can be damaged by
static electricity (ESD). Some will display a warning label,
but many will not. Discharge personal static electricity by
touching a metal ground point on the vehicle prior to
servicing any ESD sensitive component.
ENGINE OIL
CAUTION: Never use non-detergent or straight mineral oil.
FUEL SYSTEM SERVICE
WARNING: Relieve fuel system pressure prior to servicing any fuel
system component (fuel injection models).
HALOGEN BULBS
WARNING: Halogen bulbs contain pressurized gas which may explode if
overheated. DO NOT touch glass portion of bulb with bare
hands. Eye protection should be worn when handling or working
around halogen bulbs.
RADIATOR CAP
CAUTION: Always disconnect the fan motor when working near the
radiator fan. The fan is temperature controlled and could
start at any time even when the ignition key is in the OFF
position. DO NOT loosen or remove radiator cap when cooling
system is hot.
RADIATOR FAN

touching a metal ground point on the vehicle prior to
servicing any ESD sensitive component.
ENGINE OIL
CAUTION: Never use non-detergent or straight mineral oil.
FUEL SYSTEM SERVICE
WARNING: Relieve fuel system pressure prior to servicing any fuel
system component (fuel injection models).
HALOGEN BULBS
Halogen bulbs contain pressurized gas which may explode if
overheated. DO NOT touch glass portion of bulb with bare hands. Eye
protection should be worn when handling or working around halogen
bulbs.
POWER STEERING FLUID
When adding power steering fluid, avoid spilling. Damage to
alternator, located beneath power steering reservoir, could result.
RADIATOR CAP
CAUTION: Always disconnect the fan motor when working near the
radiator fan. The fan is temperature controlled and could
start at any time even when the ignition key is in the OFF
position. DO NOT loosen or remove radiator cap when cooling
system is hot.
RADIATOR FAN
WARNING: Keep hands away from radiator fan. Fan is controlled by a
thermostatic switch which may come on or run for up to 15
minutes even after engine is turned off.
SERVICE POINT LOCATIONS
Fig. 1: Service Point Locations (1987-91 2.6L 4-Cylinder Engine)
Courtesy of Mitsubishi Motor Sales of America.

Fig. 2: 1989-92 Dash Gauges & Warning Lights
Courtesy of Mitsubishi Motor Sales of America, Inc.
OIL PRESSURE WARNING LIGHT

Light comes on with the ignition switch in the "ON" position
as a bulb check, but should go out shortly after engine is started. If
light remains on or comes on while driving, it indicates low oil
pressure and possible system malfunction. Have the system checked and
serviced immediately. Do not operate vehicle until cause is located
and corrected.
ALTERNATOR WARNING LIGHT
Light comes on with the ignition switch in the "ON" position
as a bulb check and goes out after engine is started. If light remains
on or comes on while driving, it indicates possible fault in the
electrical charging system. The alternator belt may be loose or
broken. Have the system checked and serviced promptly. Do not drive
vehicle if alternator belt is loose or broken.
"BRAKE" WARNING LIGHT
Light comes on with the ignition switch in the "ON" position
as a bulb check and goes out after engine is started. Light will also
come on with the parking brake fully or partially engaged. If light
remains on or comes on at any other time, it indicates low brake fluid
level in the master cylinder reservoir or the parking brake switch may
be damaged. Have the system checked and serviced immediately if brake
fluid level is low. Do not continue driving if further trouble is
experienced.
"CHECK ENGINE" WARNING LIGHT (IF EQUIPPED)
Light is designed to come on briefly with the ignition switch
in the "ON" position as a bulb check. If light remains on or comes on
while driving, it indicates fault in an exhaust gas related component
and the system is not functioning properly. Have the system checked
and serviced as soon as possible.
"MAINTENANCE REQUIRED" WARNING LIGHT (IF EQUIPPED)
Light comes on at 50,000 miles, 80,000 miles, 100,000 miles
and 120,000 miles (150,000 miles on 1990-91 models) as a service
reminder that it is time for the periodic maintenance of the emission
control system. Have the system inspected and serviced as necessary
when light comes on. Continued operation of vehicle without having
system serviced after warning light comes on may adversely affect
proper performance of the emission control system. Reset warning
light, after the system has been checked, by pushing the reset switch
in front of the combination meter. Remove the warning light bulb after
the last maintenance service at 120,000 miles (150,000 miles on 1990-
91 models).
"A/T TEMPERATURE" WARNING LIGHT (IF EQUIPPED)
Light comes on when the automatic transmission fluid
temperature becomes abnormally high. If light comes on, reduce engine
speed, stop car and put it in "P" (Park) position. Leave engine
running until light goes out. Normal vehicle operation may be resumed
after light has gone out. If light does not go out, have the system
checked and serviced as necessary.
WHEEL LOCK INDICATOR LIGHT (IF EQUIPPED)
Light comes on when automatic free-wheeling hubs are locked.
If ignition is turned off, indicator light will not come on when