ignition MITSUBISHI MONTERO 1991 Manual PDF

THROTTLE POSITION SENSOR (TPS) RESISTANCE TABLE








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Application ( 1) Terminal (Ground-Output) Ohms
Colt Vista
Closed ...................... 2-1 .......... 3500-6500
Open ...................... ( 2) 2-3 ........ 3500-6500
Eclipse 2.0L (VIN R&U)
Closed ...................... 2-3 .......... 3500-6500
Open ...................... ( 2) 3-4 ........ 3500-6500
Pickup & Ram-50 3.0L
Closed ...................... 1-4 .......... 3500-6500
Open ...................... ( 2) 2-3 ........ 3500-6500
Stealth & 3000GT
Closed ...................... 4-1 .......... 3500-6500
Open ...................... ( 2) 4-2 ........ 3500-6500
All Others
Closed ...................... 1-4 .......... 3500-6500
Open ...................... ( 2) 2-4 ........ 3500-6500
( 1) - Measure across TPS terminals with connector disconnected.
( 2) - Resistance should increase smoothly.









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VEHICLE SPEED SENSOR CONTINUITY TEST TABLE ( 1)








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Application ( 2) Continuity
All Models ............ 4 Changes Per Revolution
( 1) - Measure continuity at back of speedometer.
See L - WIRING DIAGRAMS article in the
ENGINE PERFORMANCE Section.
( 2) - With ECU connector disconnected. Turn speedometer
cable to cycle reed switch on and off.









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VEHICLE SPEED SENSOR VOLTAGE TEST TABLE ( 1)








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Application ( 2) Volts
All Models
Ignition switch OFF ................ 1 Or Less
Ignition switch ON ................... 4.5-4.9
( 1) - Measure voltage at back of speedometer. See
L - WIRING DIAGRAMS article in the ENGINE
PERFORMANCE Section.
( 2) - With ECU connector disconnected. Turn speedometer
cable to cycle reed switch on and off.









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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

ignition switch is turned on again until vehicle begins to move, even
if free-wheeling hubs are in locked condition. Light comes on or goes
out by detecting vehicle speed (approximately 3 mph). When vehicle
speed is less than 3 mph, the condition of the automatic free-wheeling
hubs may not agree with the indicator until vehicle speed is
increased. If vehicle has been parked in extremely cold weather in 4WD
mode, the light may remain lit, even after switching to 2WD,
indicating that hubs are still locked.

IGNITION SYSTEM
IGNITION COIL
IGNITION COIL RESISTANCE - Ohms @ 68F (20C)








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Application Primary Secondary
1.5L (VIN A) ................ .9-1.2 ............... 20,000-29,000\
1.6L (VIN Y) ( 1) ............ .77-.95 .............. 10,300-13,900
1.8L (VIN T) ................ .9-1.1 ............... 19,000-27,000\
2.0L (VIN R & U) ( 1) ........ .77-.95 .............. 10,300-13,900
2.0L (VIN V) ................ .72-.88 .............. 10,800-13,200\
2.4L (VIN W) ................ .72-.88 .............. 10,300-13,900\
3.0L (VIN B & C) ( 1) ........ .67-.81 .............. 11,300-15,300
3.0L (VIN S) ................ .72-.88 .............. 10,300-13,900\
( 1) - Distributorless ignition.









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HIGH TENSION WIRE RESISTANCE
HIGH TENSION WIRE RESISTANCE








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Application (1) Ohms
1.5L (VIN A)
Coil Wire ........................... ( 2)
No. 1 Wire ....................... 11,500
No. 2 Wire ......................... 9100
No. 3 Wire ......................... 9000
No. 4 Wire ......................... 6700
1.8L (VIN T)
Coil Wire ........................... ( 2)
No. 1 Wire ....................... 10,100
No. 2 Wire ....................... 11,500
No. 3 Wire ....................... 12,000
No. 4 Wire ....................... 13,000
2.0L (VIN R & U)
Coil Wire ...................... Not Used
No. 1 Wire ......................... 5800
No. 2 Wire ......................... 8400
No. 3 Wire ....................... 10,600
No. 4 Wire ......................... 9700
2.0L (VIN V)
Colt Vista
Coil Wire ........................ 2700
No. 1 Wire ..................... 10,100
No. 2 Wire ..................... 11,800
No. 3 Wire ..................... 13,100
No. 4 Wire ..................... 13,000
Galant
Coil Wire ........................ 2700
No. 1 Wire ..................... 10,100
No. 2 Wire ..................... 11,800
No. 3 Wire ..................... 11,800
No. 4 Wire ..................... 14,200
2.4L (VIN W)
Coil Wire .......................... 3000
No. 1 Wire ....................... 10,000
No. 2 Wire ....................... 12,000

Fig. 4: Firing Order & Distributor Rotation (Stealth 3.0L SOHC)
Fig. 5: Firing Order (3.0L DOHC)
IGNITION TIMING
IGNITION TIMING (Degrees BTDC @ RPM)

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Application ( 1) Basic ( 2) ( 3) Actual
1.5L
Colt & Colt 200 ................ 5 @ 650-850 ...... 10 @ 650-850
Mirage & Summit ................ 5 @ 650-850 ...... 10 @ 650-850
1.6L
Mirage ......................... 5 @ 650-850 ....... 8 @ 650-850
1.8L
Eclipse ........................ 5 @ 600-800 ...... 10 @ 600-800
2.0L
Colt Vista & Galant (VIN V) .... 5 @ 600-800 ...... 10 @ 600-800\
Eclipse ........................ 5 @ 650-850 ....... 8 @ 650-850
Galant
(VIN R) ...................... 5 @ 650-850 ....... 8 @ 650-850\
(VIN U) ...................... 5 @ 650-850 ...... 12 @ 650-850\
2.4L
Pickup & Ram-50 ................ 5 @ 650-850 ....... 8 @ 650-850
3.0L
Montero, Pickup & Ram-50 ....... 5 @ 600-800 ...... 15 @ 600-800
Stealth & 3000GT ............... 5 @ 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. Ignition timing may
fluctuate.
( 3) - If vehicle altitude is more than 2300 ft. above sea level,
actual timing may be advanced.









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FUEL SYSTEM
FUEL PUMP
REGULATED FUEL PRESSURE








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At Idle w/Vacuum At Idle w/o Vacuum
Application psi (kg/cm) psi (kg/cm)
Eclipse 2.0L (VIN U)
With Man. Trans. ................. 33 (2.3) .... 36-38 (2.5-2.7\
)
With Auto. Trans. ................ 33 (2.3) .... 41-46 (2.9-3.2\
)
Galant 2.0L (VIN V), Montero (3.0L),
Pickup (3.0L) & Ram-50 (3.0L) ..... 38 (2.7) .... 47-50 (3.3\
-3.5)
Stealth & 3000GT (VIN B & S) ....... 38 (2.7) .... 47-50 (3.3-3\
.5)
Stealth & 3000GT (VIN C) ........... 34 (2.8) .... 43-45 (3.0-3\
.2)
All Others ......................... 38 (2.7) .... 47-50 (3.3-3.5\
)









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INJECTOR RESISTANCE
INJECTOR RESISTANCE








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Application Ohms
Non-Turbo ........................... 13-16
Turbo ................................. 2-3









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THROTTLE POSITION SENSOR (TPS)

STE ER IN G C O LU M N S W IT C HES

1991 M it s u bis h i M onte ro
1991 ACCESSORIES & SAFETY EQUIPMENT
Chrysler Motors/Eagle/Mitsubishi Steering Column Switches
Dodge; Colt, Colt Vista, Colt 200, Ram-50, Stealth
Eagle; Summit
Mitsubishi: Eclipse, Galant, Mirage, Montero, Pickup, 3000Gt
Plymouth; Colt, Colt Vista, Colt 200
TESTING
For steering column switch testing, see STEERING COLUMN
SWITCH TESTING/REMOVAL & INSTALLATION table for figure reference.
STEERING COLUMN SWITCH TESTING/REMOVAL & INSTALLATION TABLE









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Model Figure Number
Colt, Colt 200, Mirage & Summit ............... See Fig. 1
Colt Vista .................................... See Fig. 2
Eclipse ....................................... See Fig. 3
Galant ........................................ See Fig. 4
Montero ....................................... See Fig. 5
Pickup & Ram-50 ............................... See Fig. 6
Stealth & 3000GT .............................. See Fig. 7









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REMOVAL & INSTALLATION
IGNITION SWITCH
Removal (Colt, Colt 200, Eclipse, Mirage & Summit)
1) Remove steering column switch. See STEERING COLUMN SWITCH
under REMOVAL & INSTALLATION. On automatic transaxle vehicles,
disconnect key interlock cable, and remove spring and slide lever.
2) On all vehicles, insert key and turn ignition switch to
ACC position. Push steering lock cylinder lock pin inward and pull
steering lock cylinder away from dash. Remove ignition switch and key
reminder switch.
Installation
1) Place ignition switch in LOCK position. Install slide
lever to steering lock cylinder. Install spring to inner cable of key
interlock cable (if used).
2) Connect key interlock cable to slide lever and steering
lock cylinder. Lightly grease around slide lever. To complete
installation, reverse removal procedure. Ensure key interlock system
functions properly.
Removal & Installation (Colt Vista, Galant, Montero, Pickup,
Ram-50, Stealth & 3000GT)
Remove knee protector (if necessary). Remove upper and lower
column covers. Remove air ducts and cable bands as necessary. Remove
ignition switch and key reminder switch. To install, reverse removal
procedure.
STEERING COLUMN SWITCH
Removal & Installation (Except Stealth & 3000GT)

Remove horn pad and steering wheel. See Figs. 1-6. See
STEERING COLUMN TESTING/REMOVAL & INSTALLATION table for figure
directory on specific model. Remove knee protector and upper and lower
column covers (if necessary). On Eclipse, remove hood lock release
handle and air ducts. On all models, remove any necessary cable bands,
and remove steering column switch. To install, reverse removal
procedure.
Removal (Stealth & 3000GT)
1) Disconnect negative battery cable. Wait 30 seconds, and
then remove air bag module mounting nut from back side of module. To
remove clockspring connector from air bag module, force lock outward
and pry it using a flat screwdriver. Ensure no undue force is exerted
on connector when it is removed. Remove air bag module, and store it
face up. See Fig. 7.
CAUTION: Wait at least 30 seconds after disconnecting battery cable
before continuing servicing.
2) Remove steering wheel and knee protector. Remove upper and
lower column covers. Remove air ducts. Remove right and left steering
column switches.
WARNING: DO NOT hammer on steering wheel. Collapsible steering column
mechanism may be damaged.
Installation
1) To install, reverse removal procedure. Before installing
steering wheel, center clockspring by lining up NEUTRAL mark of
clockspring with mark on steering column. To complete installation,
reverse removal procedure. DO NOT reconnect negative battery cable
until air bag module is installed.
2) After installation is complete, turn ignition on from
passenger side of vehicle. Supplemental Restraint System (SRS) light
on dash should come on for approximately 7 seconds. If SRS light does
not come on, stays on or flashes, repair air bag system.

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I - S YSTE M /C O M PO NEN T T E STS

1991 M it s u bis h i M onte ro
1991 ENGINE PERFORMANCE
System & Component Testing
Chrysler Motors: Ram-50
Mitsubishi: Montero, Pickup
INTRODUCTION
Before testing separate components or systems, perform
procedures in F - BASIC TESTING article in the ENGINE PERFORMANCE
Section. Since many computer controlled and monitored components set a
trouble code if they malfunction, also perform procedures in G - TESTS
W/CODES article in the ENGINE PERFORMANCE Section.
NOTE: Testing individual components does not isolate shorts or
opens. Perform all voltage tests with a Digital
Volt-Ohmmeter (DVOM) with a minimum 10-megohm input
impedance, unless stated otherwise in test procedure. Use
ohmmeter to isolate wiring harness shorts or opens.
COMPUTERIZED ENGINE CONTROLS
CONTROL UNIT
NOTE: To identify ECU power and ground circuits, see appropriate
L - WIRING DIAGRAMS article in the ENGINE PERFORMANCE
Section.
Ground Circuits
1) ECU is located near right kick panel. Turn ignition off.
Using an ohmmeter, check for continuity between ground and ECU
terminals No. 101 and 106. Resistance should be zero ohms. If
resistance is not zero ohms, repair open circuit between ECU connector
and ground.
2) Connect voltmeter negative lead to ground. Connect
positive lead to ECU ground terminals as in step 1). With vehicle
running, voltmeter should indicate less than one volt. If voltmeter
reading is greater than one volt, check for open, corrosion or loose
connection in ground circuit.
Power Circuits
ECU is located near right kick panel. Turn ignition on. Check
for battery voltage on ECU terminals No. 102 and 107. If battery
voltage is not present, check operation of MPI control relay. See
RELAYS under MOTORS, RELAYS & SOLENOIDS.
ENGINE SENSORS & SWITCHES
BAROMETRIC PRESSURE SENSOR
Sensor is a component part of airflow sensor assembly. See G
- TESTS W/CODES article in the ENGINE PERFORMANCE Section.
COOLANT TEMPERATURE SENSOR
1) Remove coolant temperature sensor located near thermostat
housing (2-wire connector). Place end of sensor in water with terminal\

connector portion of sensor slightly above water.
2) Gradually heat water and read resistance values across
terminal connectors. See COOLANT TEMPERATURE SENSOR RESISTANCE table.
If resistance is not within specification, replace sensor.
COOLANT TEMPERATURE SENSOR RESISTANCE TABLE









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TemperatureF (C) Ohms
Montero & Pickup 3.0L
32 (0) ............................. 5900
68 (20) ............................ 2500
104 (40) ........................... 2700
176 (80) ............................ 300
All Others
32 (0) ............................. 5900
68 (20) ............................ 2500
104 (40) ........................... 1100
176 (80) ............................ 300









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CRANK ANGLE SENSOR
See IGNITION SYSTEM.
DETONATION SENSOR
See IGNITION SYSTEM.
EGR TEMPERATURE SENSOR
California
See EXHAUST GAS RECIRCULATION (EGR) under EMISSION SYSTEMS &
SUB-SYSTEMS.
IDLE POSITION SWITCH
NOTE: Idle position switch is incorporated in idle speed control
motor assembly, motor position sensor or throttle position
sensor, depending upon vehicle application.
Pickup 2.4L & Ram-50 2.4L
1) Disconnect motor position sensor (MPS) connector. Connect\
ohmmeter lead between ground and MPS connector terminal No. 4. See
Fig. 2 .
2) With accelerator pedal pressed, no continuity should be
present. With accelerator pedal released, continuity should be
present. If switch continuity is not as specified, replace MPS.
Montero, Pickup 3.0L & Ram-50 3.0L
1) Disconnect throttle position sensor (TPS) connector.
Connect ohmmeter between TPS connector terminals No. 1 and 2. See
Fig. 6 .
2) With accelerator pedal pressed, no continuity should be
present. With accelerator pedal released, continuity should be
present. If idle switch continuity is not as specified, replace TPS.
INHIBITOR SWITCH
Automatic Transmission
Switch is mounted to automatic transaxle, near shift lever