1991 MITSUBISHI MONTERO Service Manual

ACTUATOR TESTS
Resistance Test (1991)
Disconnect actuator connector. Resistance between terminals
No. 1 and 2 should be 20 ohms. See Figs. 17-21. If resistance is not
correct, replace actuator assembly.
Operational Test (1991)
1) With connector disconnected, connect battery voltage to
terminal No. 1. See Figs. 17-21. Ground terminal No. 2. Connect
ammeter between positive side of battery and terminal No. 1 of
actuator connector.
2) Solenoid should make a click sound. Ammeter should read .
5-.7 amps. Connect positive side of battery to terminal No. 4 and
ground terminal No. 3. Actuator should pull in and stop.
3) While actuator is moving in, ammeter should read less than
.5 amps. When actuator travel reaches midpoint, disconnect terminal
No. 1 from positive side of battery. Actuator should return to
original position. If actuator does not test correctly, replace
actuator.
4) Reverse connections of terminals No. 4 and 3 in step 2).
Connect battery voltage to terminal No. 3 and ground terminal No. 4.
Actuator should move out then stop. While actuator is moving, ammeter
should read less than .5 amps.
1992
Remove actuator. Apply vacuum to actuator. Actuator linkage
holder should move more than 1.38" (35 mm). Actuator diaphragm should
hold vacuum. Replace actuator if actuator does not test correctly.
VEHICLE SPEED SENSOR TEST
1) Remove instrument cluster. See INSTRUMENT CLUSTER under
REMOVAL & INSTALLATION. Check continuity between vehicle speed sensor
terminals at instrument cluster. See Fig. 30 or 31.
2) Ensure continuity pulses on and off 4 times per revolution
of speedometer shaft connection. If continuity is not as specified,
replace vehicle speed sensor.
Fig. 30: 1991 Checking Speed Sensor Circuit
Courtesy of Mitsubishi Motor Co.

Fig. 31: 1992 Checking Speed Sensor Circuit
Courtesy of Mitsubishi Motor Co.
REMOVAL & INSTALLATION
ACTUATOR
Removal & Installation (1991)
Remove linkage protector. Loosen adjusting nuts for
accelerator cables "A" and "B". See Fig. 1 or 2. Disconnect actuator
side inner cable. Disconnect actuator electrical connector. Remove
actuator. To install, reverse removal procedure.
Removal & Installation (1992)
Disconnect cruise control cable from link. Disconnect
actuator wiring connector. Remove vacuum pump and vacuum pump bracket.
Remove actuator and actuator bracket. To install, reverse removal
procedure.
CRUISE CONTROL SWITCH
Removal & Installation (1991)
See STEERING COLUMN SWITCH in this article.
Removal & Installation (1992)

Remove lower steering column cover. Disconnect electrical
connectors. Remove screws attaching cruise control switch to steering
column. Remove switch. To install, reverse removal procedure.
STEERING COLUMN SWITCH
WARNING: DO NOT hammer steering wheel. Collapsible steering column
mechanism may be damaged.
Removal & Installation (1991)
Remove horn pad and steering wheel. Remove upper and lower
column covers. Remove column switch. To install, reverse removal
procedure.
VEHICLE SPEED SENSOR
Removal & Installation
Remove instrument cluster. See INSTRUMENT CLUSTER in this
article. Speed sensor is a part of speedometer.
INSTRUMENT CLUSTER
Removal & Installation
Disconnect negative battery cable. Remove cluster cover.
Disconnect speedometer cable. Remove instrument cluster. To install,
reverse removal procedure.
CONTROL UNIT
Removal & Installation (1991)
Cruise control unit is located behind left front kick panel.
Remove left front kick panel. Remove control unit. To install, reverse
removal procedure.
Removal & Installation (1992)
Cruise control unit is located behind center of dash panel.
Remove center trim panel and radio or radio plug bezel. Remove control
unit. To install, reverse removal procedure.
WIRING DIAGRAMS
For 1992 wiring diagram, See appropriate chassis wiring
diagram in the WIRING DIAGRAMS Section.

Fig. 32: 1991 Cruise Control System Wiring Diagram
Courtesy of Mitsubishi Motor Co.

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DEFO GGER - R EA R W IN DO W

1991 M it s u bis h i M onte ro
1991 ACCESSORIES & SAFETY EQUIPMENT
Chrysler Corp./Eagle/Mitsubishi Defoggers - Rear Window
Dodge; Colt, Colt Vista, Colt 200, Stealth
Eagle; Summit
Mitsubishi: Eclipse, Galant, Mirage, Montero, 3000GT
Plymouth; Colt, Colt Vista, Colt 200
DESCRIPTION & OPERATION
The rear window defogger is a heating wire grid bonded to the
inside of the window. Heat is regulated by a control switch located on
the instrument panel.
TROUBLE SHOOTING
DEFOGGER DOES NOT WORK
Check for blown fuse, poor contact, defective defogger
switch, poor connection or open wire.
INDICATOR LIGHT DOES NOT WORK
Check for burned out bulb, open wire or poor connection.
TESTING
NOTE: Testing information for all components on all vehicles is
not available from manufacturer.
DEFOGGER SWITCH TEST
NOTE: Remove window defogger switch and disconnect switch
connector for the following test.
Colt, Colt 200, Mirage & Summit
Turn defogger switch to OFF position. Check switch continuity
using ohmmeter. Continuity should be present between terminals No. 3
and 6. See Fig. 1. Turn defogger switch to ON position. Continuity
should be present between terminals No. 1 and 5, 2 and 4, and 3 and 6.
Colt Vista
Turn defogger switch to OFF position. Check switch continuity
using ohmmeter. Continuity should be present between terminals No. 3
and 6, and terminals No. 4 and 1. See Fig. 1. Turn defogger switch to
ON position. Continuity should exist between terminals No. 5 and 2, 3
and 6, and 4 and 1.
Eclipse
Turn defogger switch to OFF position. Check switch continuity
using ohmmeter. Continuity should be present between terminals No. 1
and 5, and terminals No. 2 and 6. Turn defogger switch to ON position.
Continuity should be present between terminals No. 3 and 4, 1 and 5,
and 2 and 6. See Fig. 1.
Galant
Turn defogger switch to OFF position. Check switch continuity

using ohmmeter. Continuity should be present between terminals No. 1
and 4, and terminals No. 5 and 6. Turn defogger switch to ON position.
Continuity should exist between terminals No. 3 and 2, 5 and 6, and 1
and 4. See Fig. 1.
Montero
Turn defogger switch to OFF position. Check switch continuity
using ohmmeter. Continuity should be present between terminals No. 5
and 6, and terminals No. 1 and 2. Turn defogger switch to ON position.
Continuity should exist between terminals No. 3 and 4, 5 and 6, and 1
and 2. See Fig. 1.
Stealth & 3000GT
Remove defogger switch assembly from instrument cluster
bezel. With defogger switch in OFF position, check switch continuity
using ohmmeter. Continuity should exist between terminals No. 3 and 4.
With defogger switch in ON position, continuity should exist between
terminals No. 1 and 2, 1 and 6, and 3 and 4. See Fig. 1.
Fig. 1: Identifying Defogger Switch Terminals
Courtesy of Chrysler Motors.
DEFOGGER RELAY TEST

Colt, Colt 200, Mirage & Summit
Remove defogger relay located to the right of fuse block.
Ground relay terminal No. 4, and apply battery voltage to terminal No.
2. Check relay continuity using ohmmeter. Continuity should exist
between terminals No. 1 and 3. With voltage disconnected, continuity
should not be present between terminals No. 1 and 3. Ensure continuity
is present between terminals No. 2 and 4. See Fig. 2.
Colt Vista, Eclipse, Stealth & 3000GT
Remove defogger relay located on left center of firewall.
Ground relay terminal No. 4, and apply battery voltage to relay
terminal No. 3. Check relay continuity using ohmmeter. Ensure
continuity exists between terminals No. 1 and 2. With voltage
disconnected, continuity should not exist between terminals No. 1 and
2. Continuity should exist between terminals No. 3 and 4. See Fig. 2.
Galant
Remove defogger relay located in right front corner of engine
compartment. Ground relay terminal No. 1, and apply battery voltage to
terminal No. 3. Check relay continuity using ohmmeter. Continuity
should exist between terminals No. 4 and 5. See Fig. 2. With voltage
disconnected, continuity should not exist between terminals No. 4 and
5. Ensure continuity exists between terminals No. 1 and 3. See Fig. 2.
Fig. 2: Identifying Defogger Relay Terminals
Courtesy of Chrysler Motors.
DEFOGGER TIMER TEST

Colt, Colt 200, Mirage & Summit
Remove defogger timer from junction block under left side of
instrument panel. Connect a battery and test light to defogger timer
terminals. See Fig. 3. Apply battery voltage to terminal No. 7 for 5-7
seconds. Ensure test light illuminates for approximately 10 seconds.
Reapply battery voltage to terminal No. 7. Test light should go off
when voltage is applied again.
Colt Vista
With ignition switch in ON position, apply battery voltage to
terminal No. 2 of defogger timer. Timer should operate for
approximately 11 seconds then stop. See Fig. 3.
Eclipse & Galant
Remove defogger timer from interior relay block. Connect
battery voltage and test light to timer. See Fig. 3. Ensure test light
illuminates for approximately 11 seconds when battery voltage is
applied to terminal No. 4. Reapply battery voltage to terminal No. 4
and observe test light. Test light should go off.
Fig. 3: Identifying Defogger Timer Terminals
Courtesy of Chrysler Motors.
GRID TEST
1) Start engine and operate at 2000 RPM. Ensure battery is
fully charged. Turn defogger switch to ON position. Using a voltmeter,
check voltage at center section of each grid wire. If voltage is
approximately 6 volts, grid wire is okay. If voltage is approximately
12 volts, an open is present in the negative circuit. Move probe
slowly toward the negative terminal to determine location of open
circuit.
2) If voltage is zero volt, an open is present in the
positive circuit. Move probe slowly toward the positive terminal to