fog light MITSUBISHI MONTERO 1998 Service Manual

DEFOGGER - REAR WINDOW
1998 Mitsubishi Montero
1998 ACCESSORIES & EQUIPMENT
Mitsubishi - Rear Window Defoggers
Diamante, Eclipse, Galant, Mirage, Montero, Montero Sport,
3000GT
DESCRIPTION & OPERATION
Rear window defogger is a heating filament grid bonded to
inside of window. Rear window defogger is controlled by defogger
switch on instrument panel and a defogger relay.
On Montero, a timer relay controls defogger operation for 9-
11 minutes, then turns defogger off. On Eclipse and Galant, defogger
timer circuit is integral with Electronic Timer Alarm Control System
(ETACS) ECU. Timer will operate defogger for 11 minutes then turn off,\
even with defogger switch in ON position and indicator light
illuminated. On Diamante, timer will operate defogger for 20 minutes,
then turn off.
COMPONENT LOCATIONS
COMPONENT LOCATIONS TABLE








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Component Location
A/C ECU
Diamante ......................... Behind Center Of Dash
Data Link Connector (DLC) ....... Under Left Side Of Dash,
Near Steering Column
Defogger Relay
Montero Sport ....................... Under Left Side Of
Glove Compartment
Except Montero Sport ................... On Relay Block,
Behind Left Side Of Dash
Defogger Timer
Diamante ......................... Integral With A/C ECU
Eclipse & Galant ............... Integral With ETACS-ECU
Montero ...................... Behind Left Side Of Dash,
Behind Speaker
ETACS-ECU ......................... Above Left Kick Panel,
On Junction Block









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TROUBLE SHOOTING
* PLEASE READ THIS FIRST *
NOTE: For additional trouble shooting information on Eclipse and
Galant, see SYMPTOM TESTS.
DEFOGGER DOES NOT WORK
Check for blown fuse, poor contact, defective defogger
switch, poor connection or open wire.
DEFOGGER TIMER INOPERATIVE

Check defogger switch or defogger timer. See COMPONENT TESTS.
INDICATOR LIGHT DOES NOT WORK
Check for burned out bulb, open circuit or poor connection.
INDICATOR LIGHT IS DIM
Check rheostat or indicator bulb.
SYMPTOM TESTS
INPUT SIGNAL INSPECTION
NOTE: The following information only applies to Eclipse and Galant.
NOTE: Perform input signal inspection before proceeding with
SYSTEM TESTS .
Eclipse & Galant
1) Input signal inspection can be performed using scan tool
or an analog voltmeter. To perform inspection using scan tool, go to
next step. To perform inspection using an analog voltmeter, go to step
3).
2) Turn ignition off. Connect scan tool to Data Link
Connector (DLC). Turn ignition on and then off. If buzzer on scan tool\
sounds when ignition was turned on, ECU input signal is normal. If
buzzer did not sound, go to SYSTEM TESTS.
3) Turn ignition off. Connect DTC Check Harness (MB991529) t\
o
DLC terminals No. 4 or 5 (ground) and terminal No. 9. See Fig. 1.
Connect voltmeter leads to check harness leads. Turn ignition switch
on, then off. If voltmeter deflects once when ignition was turned on,
ECU input signal is normal. If voltmeter did not deflect, go to
SYSTEM TESTS .
Fig. 1: Identifying Data Link Connector (DLC) Terminals
Courtesy of Mitsubishi Motor Sales of America
SYSTEM TESTS

Fig. 6: Identifying Defogger Switch Terminals (3000GT)
Courtesy of Mitsubishi Motor Sales of America
DEFOGGER TIMER TEST
Montero
Remove defogger timer from interior relay block. Connect test
battery and test light to timer. See Fig. 7. Ensure test light
illuminates for about 11 seconds when battery voltage is applied to
terminal No. 3. Reapply battery voltage to terminal No. 3 and observe
test light. Test light should go off. If timer does not test as
specified, replace timer.
Fig. 7: Identifying Defogger Timer Terminals (Montero)
Courtesy of Mitsubishi Motor Sales of America
GRID TEST

* ELECTRICAL SYSTEM UNIFORM INSPECTION GUIDELINES *
1998 Mitsubishi Montero
GENERAL INFORMATION
Electrical System Motorist Assurance Program
Standards For Automotive Repair
All Makes and Models
INTRODUCTION TO MOTORIST ASSURANCE PROGRAM (MAP)
CONTENTS
OVERVIEW OF MOTORIST ASSURANCE PROGRAM
OVERVIEW OF SERVICE REQUIREMENTS & SUGGESTIONS
ACTUATOR MOTORS (SOLENOIDS) (ELECTRIC)
ACTUATOR MOTORS (VACUUM)
AIR BAGS
ALTERNATORS AND GENERATORS
AMPLIFIERS
ANTENNAS
BATTERIES
BATTERY CABLES
BATTERY CABLES
BATTERY HOLD DOWN HARDWARE
BATTERY TRAYS AND HOLD DOWN HARDWARE
BATTERY WIRES
BELTS
BULB SOCKETS
BULBS, SEALED BEAMS AND LEDS
CD PLAYERS
CIGARETTE LIGHTER ASSEMBLIES
CIRCUIT BREAKERS
CLUTCH SWITCHES
CONNECTORS
CONTROL MODULES
CRUISE CONTROL BRAKE SWITCHES
CRUISE CONTROL CABLES
CRUISE CONTROL CLUTCH SWITCHES
CRUISE CONTROL LINKAGES AND CABLES
CRUISE CONTROL RESERVOIRS
CRUISE CONTROL TUBES
CRUISE CONTROL VACUUM DUMP RELEASE VALVES
CRUISE CONTROL VACUUM HOSES, TUBES AND RESERVOIRS
CRUISE CONTROL VEHICLE SPEED SENSORS
DEFOGGERS
DEFROSTERS
DELAYS
DIMMERS
ELECTRIC HEATERS
EQUALIZERS
FUSE BLOCKS
FUSE BOXES AND BLOCKS
FUSES, FUSIBLE LINKS AND CIRCUIT BREAKERS
FUSIBLE LINKS
GAUGES
GENERATORS
GROUND CABLES AND STRAPS
GROUND STRAPS
HEADLIGHT ADJUSTERS
HEATING ELEMENTS (DEFROSTERS, DEFOGGERS, ELECTRIC HEATERS AND SEATS)
HORNS AND SIRENS

Brake On/Off (BOO) Switch ................... Cruise Control Systems\
Engine Performance
Shift Interlock Systems
Buzzer Module ...................................... Warning Systems
Camshaft Position (CMP) Sensor .................. Engine Performance\
Central Control Module ........................... Anti-Theft System
Clockspring ............................... Air Bag Restraint System
Cruise Control Systems
Steering Column Switches
Clutch Pedal Position Switch .............................. Starters
Clutch Start Switch ....................................... Starters
Combination Meter ......................... Analog Instrument Panels
Constant Control Relay Module (CCRM) ............ Engine Performance\
Electric Cooling Fans
Convenience Center .............................. Power Distribution
Illumination/Interior Lights
Convertible Top Motor ........................ Power Convertible Top
Convertible Top Switch ....................... Power Convertible Top
Crankshaft Position (CKP) Sensor ................ Engine Performance\
Cruise Control Module ....................... Cruise Control Systems
Cruise Control Switch ....................... Cruise Control Systems
Condenser Fan Relay(s) ....................... Electric Cooling Fans\
Data Link Connector (DLC) ....................... Engine Performance\
Daytime Running Lights Module ............... Daytime Running Lights
Exterior Lights
Defogger Relay ................................ Rear Window Defogger
Diagnostic Energy Reserve Module (DERM) ... Air Bag Restraint System\
Discriminating Sensor (Air Bag) ........... Air Bag Restraint System\
Distributor ..................................... Engine Performance
Door Lock Actuators ............................... Power Door Locks
Remote Keyless Entry
Door Lock Relay(s) ................................ Power Door Locks\
Electrochromic Mirror ................................ Power Mirrors
Electronic Level Control (ELC)
Height Sensor .............................. Electronic Suspension
Electronic Level Control (ELC) Module ........ Electronic Suspension\
Engine Coolant Temperature (ECT)
Sending Unit ............................ Analog Instrument Panels
Engine Coolant Temperature (ECT) Sensor ......... Engine Performance\
Engine Control Module ........................... Engine Performance
Generators & Regulators
Starters
ETACS ECU .......................................... Warning Systems
Power Windows
Remote Keyless Entry
Evaporative (EVAP) Emissions Canister ........... Engine Performance\
EVAP Canister Purge Solenoid .................... Engine Performance
EVAP Canister Vent Solenoid ..................... Engine Performance
Exhaust Gas Recirculation (EGR) Valve ........... Engine Performance\
Fuel Tank Vacuum Sensor ......................... Engine Performance
Fog Lights ....................................... Headlight Systems
Daytime Running Lights
Fog Light Relay .................................. Headlight Systems
Daytime Running Lights
Fuel Door Release Solenoid ................. Power Fuel Door Release
Fuel Gauge Sending Unit ................... Analog Instrument Panels
Fuel Injectors .................................. Engine Performance
Fuel Pump ....................................... Engine Performance
Fuel Pump Relay ................................. Engine Performance
Power Distribution
Fuse/Relay Block ................................ Power Distribution
Fusible Links ................................... Power Distribution
Generators & Regulators

Starters
Generator .................................. Generators & Regulators
Engine Performance
Power Distribution
Generic Electronic Module (GEM) ............... Body Control Modules\
Electronic Suspension
Glow Plug Relay ................................. Engine Performance
Glow Plugs ...................................... Engine Performance
Grounds ........................................ Ground Distribution
Headlight Door Module .............................. Headlight Doors
Headlight Relay .................................. Headlight Systems
Daytime Running Lights
Headlights ....................................... Headlight Systems
Daytime Running Lights
Heated Oxygen Sensor(s) (HO2S) .................. Engine Performan\
ce
Heated Windshield Control Module ................ Heated Windshields
Height Sensor ................................ Electronic Suspension
Horns ..................................... Steering Column Switches
Horn Relay ................................ Steering Column Switches
Idle Air Control (IAC) Motor/Valve .............. Engine Performance\
Ignition Coil(s) ................................ Engine Performance\
Ignition Key Lock Cylinder ....................... Anti-Theft System
Ignition Module ................................. Engine Performance
Ignition Switch ................................. Power Distribution
Engine Performance
Generators & Regulators
Starters
Illuminated Entry Module .............. Illumination/Interior Lights
Illumination Lights ................... Illumination/Interior Lights
Impact Sensor ............................. Air Bag Restraint System
Inertia Fuel Shutoff Switch ..................... Engine Performance
Inhibit Relay ............................................. Starters
Instrument Cluster ........................ Analog Instrument Panels
Intake Air Temperature (IAT) Sensor ............. Engine Performance\
Interior Lights ....................... Illumination/Interior Lights
Interlock Switch .......................................... Starters
Junction Block .................................. Power Distribution
Keyless Entry Receiver ........................ Remote Keyless Entry
Key Reminder Switch ....................................... Starters
Knock Sensor .................................... Engine Performance
Lamp Control Module ................................ Exterior Lights
License Plate Lamp ................................. Exterior Lights
Lighting Control Module ................... Lighting Control Modules
Anti-Theft System
Daytime Running Lights
Headlight Systems
Lower Relay .................................. Power Convertible Top
Malfunction Indicator Light (MIL) ............... Engine Performance\
Instrument Panels
Manifold Absolute Pressure (MAP) Sensor ......... Engine Performance\
Mass Airflow (MAF) Sensor ....................... Engine Performance\
Mega Fuse .................................. Generators & Regulators
Memory Seat/Mirror Module ........................... Memory Systems
Mirror Defogger ............................... Rear Window Defogger
Moon Roof Motor .................................... Power Moon Roof
Moon Roof Relay .................................... Power Moon Roof
Multi-Function Control Module ...................... Warning Systems
Neutral Safety Switch ..................................... Starters
Oil Level Switch ................................ Engine Performance
Oil Pressure Switch/Sending Unit .......... Analog Instrument Panels
Engine Performance
Overhead Console .................................. Overhead Console
Oxygen Sensor(s) (O2S) .......................... Engine Performan\
ce

See TURBOCHARGER under AIR INDUCTION SYSTEMS.
FUEL SYSTEM
FUEL DELIVERY
NOTE: For fuel system pressure testing, see
F - BASIC TESTING article.
Fuel Pressure Regulator Control Solenoid Valve (Turbo Models)
See G - TESTS W/CODES article.
FUEL CONTROL
Fuel Injectors
See G - TESTS W/CODES article.
IDLE CONTROL SYSTEM
ELECTRICAL LOAD SWITCH
3000GT (DOHC)
1) Turn ignition off. Disconnect PCM connector. See
POWERTRAIN CONTROL MODULE (PCM) LOCATION table under COMPUTERIZED
ENGINE CONTROLS. Go to next step.
2) Turn headlights on. Using DVOM, check voltage between PCM
connector terminal No. 58 and chassis ground. If battery voltage is
present, turn headlights off and go to next step. If battery voltage
is not present, check and repair circuit between headlight relay
connector and PCM connector.
3) Turn defogger switch on. Using DVOM, check voltage between
PCM connector terminal No. 58 and chassis ground. If battery voltage
is present, turn defogger switch off and go to next step. If battery
voltage is not present, check and repair circuit between defogger
relay connector and PCM connector.
4) Turn blower switch on. Using DVOM, check voltage between
PCM connector terminal No. 58 and chassis ground. If battery voltage
is present, turn blower switch off and go to next step. If battery
voltage is not present, check and repair circuit between blower switch
connector and PCM connector.
5) If battery voltage is present and preceding tests do not
show any system or component malfunction and PCM is suspected,
substitute PCM with known-good unit and retest system.
IDLE AIR CONTROL (IAC) MOTOR
For testing procedures, see G - TESTS W/CODES article.
IGNITION SYSTEM
NOTE: For basic ignition checks, see F - BASIC TESTING article.
TIMING CONTROL SYSTEMS
Camshaft Position Sensor
See G - TESTS W/CODES article.
Crankshaft Position Sensor
See G - TESTS W/CODES article.

Resistance Test (Montero Only)
Using an ohmmeter, check resistance between voltmeter
terminals. See Fig. 30. Resistance should be 380-460 ohms.
Fig. 30: Identifying Voltmeter Resistance Test Terminals (Montero)
Courtesy of Mitsubishi Motor Sales of America
Voltage Test (3000GT Only)
Start engine, and let it idle. Connect voltmeter to battery.
Compare voltage reading of test voltmeter to voltage reading of
vehicle voltmeter. Voltage variation should not exceed 0.5 volt (plus
or minus). Replace instrument cluster voltmeter if voltage reading is
not as specified.
FOGLIGHT SWITCH TEST
NOTE: Montero Sport is not equipped with foglights.
Eclipse
Remove foglight switch from instrument panel. Disconnect
switch connector. Using an ohmmeter, check switch continuity. With
switch in OFF position, continuity should exist between terminals No.
1 and 3. With switch in ON position, continuity should exist between
terminals No. 1 and 3, and between terminals No. 4 and 5. See Fig. 31.
If continuity is not as specified, replace switch.
Galant & Mirage
Remove foglight switch from instrument panel. Disconnect
switch connector. Using an ohmmeter, check switch continuity. With
switch in OFF position, continuity should exist between terminals No.
1 and 2. With switch in ON position, continuity should exist between
terminals No. 1 and 2, terminals No. 3 and 4, and terminals No. 5 and
6. See Fig. 31. If continuity is not as specified, replace switch.

Montero
Remove foglight switch from instrument panel. Disconnect
switch connector. Using an ohmmeter, check switch continuity. With
switch in OFF position, continuity should exist between terminals No.
2 and 5. With switch in ON position, continuity should exist between
terminals No. 1 and 4, terminals No. 2 and 5, and terminals No. 3 and
6. See Fig. 32. If continuity is not as specified, replace switch.
3000GT
Remove foglight switch from instrument panel. Disconnect
switch connector. Using an ohmmeter, check switch continuity. With
switch in OFF position, continuity should exist between terminals No.
3 and 4. With switch in ON position, continuity should exist between
terminals No. 1 and 5. See Fig. 34. If continuity is not as specified,
replace switch.
Fig. 31: Identifying Foglight Switch Connector Terminals (Eclipse,
Galant & Mirage)
Courtesy of Mitsubishi Motor Sales of America
Fig. 32: Identifying Foglight Switch Connector Terminals (Montero)
Courtesy of Mitsubishi Motor Sales of America
FOGLIGHT RELAY TEST

Remove relay from engine compartment fuse/relay box. Using an
ohmmeter, check relay continuity. With battery voltage not supplied to
relay, continuity should exist between terminals No. 1 and 3. With
positive battery terminal connected to relay terminal No. 1 and
negative battery terminal connected to relay terminal No. 3,
continuity should exist between terminals No. 4 and 5. See Fig. 33. If
continuity is not as specified, replace relay.
Fig. 33: Identifying Foglight Relay Connector Terminals
Courtesy of Mitsubishi Motor Sales of America
HAZARD LIGHT SWITCH TEST
Eclipse, Mirage & Montero Sport
Remove hazard light switch from instrument panel. Disconnect
switch connector. Using an ohmmeter, check switch continuity. With
switch in OFF position, continuity should exist between terminals No.
5 and 7, and between terminals No. 9 and 10. With switch in ON
position, continuity should exist between terminals No. 1, 2 and 4,
between terminals No. 5 and 6, and between terminals No. 9 and 10. See
Fig. 34 . If continuity is not as specified, replace switch.
Galant