relay MITSUBISHI MONTERO 1998 Owner's Manual

Fig. 9: Testing Electric Cooling Fan Relay (Montero, Montero
Sport & 3000GT)
Courtesy of Mitsubishi Motor Sales of America.
SYSTEM TESTING
NOTE: For appropriate wiring diagram, see WIRING DIAGRAMS.
NOTE: Radiator fan on Montero and Montero Sport is mounted to a
hydraulic fan clutch which is mounted to the water pump.
Replace fan clutch if leaks are detected at case joints and
seals, fan can be rotated with very light resistance or the
bimetallic strip is damaged.
NOTE: Operation of radiator and condenser fans is controlled by
vehicle Powertrain Control Module (PCM). Based on vehicle

speed, coolant temperature and A/C operation request, PCM
will command low, medium or high speed fan operation.
Diamante
1) If only the radiator fan does not operate, check fusible
link No. 6 located in engine compartment relay box. If only the
condenser fan does not operate, check dedicated fuse No. 16 (20-amp)
located in engine compartment relay box. See WIRING DIAGRAMS. Repair
as necessary.
2) If radiator fan and condenser fan operate in all speeds
except low, check appropriate low speed relay. See COMPONENT TESTS.
See WIRING DIAGRAMS . If low speed relay is okay, check PCM. See
appropriate G - TESTS W/CODES article in ENGINE PERFORMANCE.
* G - TESTS W/CODES - 1997
* G - TESTS W/CODES - 1998
3) If radiator fan and condenser fan operate in all speeds
except high, check appropriate high speed relay. See COMPONENT TESTS.
See WIRING DIAGRAMS . If high speed relay is okay, check PCM. See
appropriate G - TESTS W/CODES article in ENGINE PERFORMANCE.
* G - TESTS W/CODES - 1997
* G - TESTS W/CODES - 1998
4) To confirm radiator fan or condenser fan operation, see
FAN OPERATING MODE (DIAMANTE) table. If fan operation is not as
specified, check wiring harness for opens or shorts. Repair as
necessary.
FAN OPERATING MODE (DIAMANTE) ( 1)









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Power Circuit
Coolant Operating Radiator Condenser
Temp.
F (C) Low/High Fan Speed Fan Speed
13 MPH ( 2)
221 (105) ( 2) ........ On/Off ....... Low ................ Low
221 (105) ( 3) ........ Off/On ....... Mid ................ Mid
239 (115) ( 3) ........ On/On ........ High .............. High
13 MPH ( 3)
221 (105) ( 2) ........ On/Off ....... Low ................ Low
221 (105) ( 2) ........ On/On ........ High .............. High
30 MPH ( 2)
203 (95) ( 2) ........ Off/Off ....... Off ................ Off
203 (95) ( 3) ......... On/Off ....... Low ................ Off
221 (105) ( 3) ........ Off/On ....... Mid ................ Mid
30 MPH ( 3)
194 (90) ( 2) ........ Off/Off ....... Off ................ Off
194 (90) ( 3) ......... On/Off ....... Low ................ Off
221 (105) ( 3) ........ On/On ........ High ............... Mid
50 MPH ( 3)
221 (105) ( 2) ....... Off/Off ....... Off ................ Off
221 (105) ( 3) ........ On/On ........ High ............... Mid
( 1) - A/C request switch is turned off.
( 2) - Approximate vehicle speed/coolant temperature or less.
( 3) - Approximate vehicle speed/coolant temperature or more.









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NOTE: Operation of radiator and condenser fans is controlled by
vehicle Powertrain Control Module (PCM). Based on vehicle
speed, coolant temperature and A/C operation request, PCM

will command low, medium or high speed fan operation.
Eclipse
1) If only the radiator fan does not operate, check fusible
link No. 7 (20-amp) located in engine compartment relay box. If only
the condenser fan does not operate, check dedicated fuse No. 9 (20-
amp) located in engine compartment relay box. See WIRING DIAGRAMS.
Repair as necessary.
2) If radiator fan and condenser fan operate in all speeds
except low, check appropriate low speed relay. See COMPONENT TESTS.
See WIRING DIAGRAMS . If low speed relay is okay, check PCM. See
appropriate G - TESTS W/CODES article in ENGINE PERFORMANCE.
* G - TESTS W/CODES - 2.0L NON-TURBO - 1997
* G - TESTS W/CODES - 2.0L TURBO - 1997
* G - TESTS W/CODES - 2.4L - 1997
* G - TESTS W/CODES - 2.0L NON-TURBO - 1998
* G - TESTS W/CODES - 2.0L TURBO & 2.4L - 1998
3) If radiator fan and condenser fan operate in all speeds
except high, check appropriate high speed relay. See COMPONENT TESTS.
See WIRING DIAGRAMS . If high speed relay is okay, check PCM. See
appropriate G - TESTS W/CODES article in ENGINE PERFORMANCE.
* G - TESTS W/CODES - 2.0L NON-TURBO - 1997
* G - TESTS W/CODES - 2.0L TURBO - 1997
* G - TESTS W/CODES - 2.4L - 1997
* G - TESTS W/CODES - 2.0L NON-TURBO - 1998
* G - TESTS W/CODES - 2.0L TURBO & 2.4L - 1998
4) To confirm radiator fan or condenser fan operation, see
FAN OPERATING MODE (ECLIPSE NON-TURBO) or FAN OPERATING MODE (ECLIPSE\
2.0L TURBO & 2.4L) table. If fan operation is not as specified, check
wiring harness for opens or shorts. Repair as necessary.
FAN OPERATING MODE (ECLIPSE NON-TURBO)









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With A/T With M/T
Coolant Radiator Radiator Condenser
Temp.
F (C) Fan Speed Fan Speed Fan Speed
28 MPH ( 1) ( 2)
203 (95) ( 2) .......... Off ......... Off ................ Off
203-210 (95-99) ....... Mid ......... High ............... Off\
210 (99) ( 3) .......... High ........ High ............... Mid
28-50 MPH ( 1)
194 (90) ( 2) .......... Off ......... Off ................ Off
194-210 (90-99) ....... Mid ......... High ............... Off\
210 (99) ( 3) .......... High ........ High ............... Mid
50 MPH ( 1) ( 3)
210 (99) ( 2) .......... Off ......... Off ................ Mid
210 (99) ( 3) .......... High ........ High ............... Off
12 MPH ( 2) ( 4)
210 (99) ( 2) .......... Mid ......... High ............... Mid
210-242 (99-117) ...... High ........ High .............. High\
242 (117) ( 3) ......... High ........ High .............. High
12-50 MPH ( 4)
210 (99) ( 2) .......... Mid ......... High ............... Mid
210-242 (99-117) ...... High ........ High .............. High\
242 (117) ( 3) ......... High ........ High .............. High
50 MPH ( 3) ( 4)
210 (99) ( 2) .......... Mid ......... High ............... Mid
210-242 (99-117) ( 3) .. High ........ High .............. High

242 (117) (3) ......... High ........ High .............. High
( 1) - A/C request switch is turned off.
( 2) - Approximate vehicle speed/coolant temperature or less.
( 3) - Approximate vehicle speed/coolant temperature or more.
( 4) - A/C request switch is turned on.









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FAN OPERATING MODE (ECLIPSE 2.0L TURBO & 2.4L)








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With A/T With M/T
Coolant Radiator Radiator Condenser
Temp.
F (C) Fan Speed Fan Speed Fan Speed
28 MPH ( 1) ( 2)
203 (95) ( 2) .......... Off ......... Off ................ Off
203-210 (95-99) ....... Low ......... Mid ................ Off\
210 (99) ( 3) .......... High ........ High ............... Mid
28-50 MPH ( 1)
194 (90) ( 2) .......... Off ......... Off ................ Off
194-210 (90-99) ....... Low ......... Mid ................ Off\
210 (99) ( 3) .......... High ........ High ............... Mid
50 MPH ( 1) ( 3)
210 (99) ( 2) .......... Off ......... Off ................ Off
210 (99) ( 3) .......... High ........ High ............... Mid
12 MPH ( 2) ( 4)
210 (99) ( 2) .......... Low ......... Mid ................ Mid
210-242 (99-117) ...... High ........ High .............. High\
242 (117) ( 3) ......... High ........ High .............. High
12-50 MPH ( 4)
210 (99) ( 2) .......... Low ......... Mid ................ Mid
210-242 (99-117) ...... High ........ High .............. High\
242 (117) ( 3) ......... High ........ High .............. High
50 MPH ( 3) ( 4)
210 (99) ( 2) .......... Low ......... Mid ................ Mid
210-242 (99-117) ( 3) .. High ........ High .............. High
242 (117) ( 3) ......... High ........ High .............. High
( 1) - A/C request switch is turned off.
( 2) - Approximate vehicle speed/coolant temperature or less.
( 3) - Approximate vehicle speed/coolant temperature or more.
( 4) - A/C request switch is turned on.









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NOTE: Operation of radiator and condenser fans is controlled by
vehicle Powertrain Control Module (PCM). Based on vehicle
speed, coolant temperature and A/C operation request, PCM
will command low, medium or high speed fan operation.
Galant
1) If only the radiator fan does not operate, check fusible
link No. 5 (30-amp) located in engine compartment relay box. If only
the condenser fan does not operate, check dedicated fuse No. 3 (30-
amp) located in engine compartment relay box. See WIRING DIAGRAMS.
Repair as necessary.
2) If radiator fan and condenser fan operate in all speeds
except low, check appropriate low speed relay. See COMPONENT TESTS.
See WIRING DIAGRAMS . If low speed relay is okay, check PCM. See
appropriate G - TESTS W/CODES article in ENGINE PERFORMANCE.
* G - TESTS W/CODES - 1997
* G - TESTS W/CODES - 1998

3) If radiator fan and condenser fan operate in all speeds
except high, check appropriate high speed relay. See COMPONENT TESTS.
See WIRING DIAGRAMS . If high speed relay is okay, check PCM. See
appropriate G - TESTS W/CODES article in ENGINE PERFORMANCE.
* G - TESTS W/CODES - 1997
* G - TESTS W/CODES - 1998
4) To confirm radiator fan or condenser fan operation, see
appropriate FAN OPERATING MODE (GALANT) table. If fan operation is not\
as specified, check wiring harness for opens or shorts. Repair as
necessary.
FAN OPERATING MODE (GALANT) ( 1)









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Coolant Radiator Condenser
Temp. F (C) Fan Speed Fan Speed
28 MPH ( 2)
203 (95) ( 2) ................ Off .......................... Off
203-221 (95-105) ............ Low .......................... Low\
221 (105) ( 3) .............. High ......................... High
28-50 MPH
194 (90) ( 2) ................ Off .......................... Off
194-221 (90-105) ............ Low .......................... Low\
221 (105) ( 3) .............. High ......................... High
50 MPH ( 3)
221 (105) ( 2) ............... Off .......................... Off
221 (105) ( 3) .............. High ......................... High
Any Speed ( 4)
221 (105) ( 2) ............... Low .......................... Low
221 (105) ( 3) .............. High ......................... High
( 1) - A/C request switch is turned off.
( 2) - Approximate vehicle speed/coolant temperature or less.
( 3) - Approximate vehicle speed/coolant temperature or more.
( 4) - A/C request switch is turned on.









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NOTE: Operation of radiator and condenser fans is controlled by
vehicle Powertrain Control Module (PCM). Based on vehicle
speed, coolant temperature and A/C operation request, PCM
will command low, medium or high speed fan operation.
Mirage
1) If only the radiator fan does not operate, check fusible
link No. 5 (30-amp) located in engine compartment relay box. If only
the condenser fan does not operate, check fusible link No. 2 (100-amp)\
and dedicated fuse No. 1 (25-amp) located in engine compartment relay
box. See WIRING DIAGRAMS . Repair as necessary.
2) If fusible links and dedicated fuse are okay, check
appropriate fan relay and/or fan motor for proper operation. See
COMPONENT TESTS. See WIRING DIAGRAMS. If fan relay and motor are okay,
check PCM. See appropriate G - TESTS W/CODES article in ENGINE
PERFORMANCE.
* G - TESTS W/CODES - 1.5L - 1997
* G - TESTS W/CODES - 1.8L - 1997
* G - TESTS W/CODES - 1998
3) To confirm radiator fan or condenser fan operation, see
appropriate FAN OPERATING MODE (MIRAGE) table. If fan operation is not\
as specified, check wiring harness for opens or shorts. Repair as

necessary.
FAN OPERATING MODE (MIRAGE)









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Power Circuit
Coolant Operating Radiator Condenser
Temp.
F (C) RAD/COND Fan Speed Fan Speed
203 (95) ( 1) ( 2) ...... Off/Off ....... Off ................ Off
203-221 (95-105) ( 1) ... On/Off ........ On ................ Off
221 (105) ( 1) ( 3) ...... On/On ......... On ................. On
All Temp. ( 4) .......... On/On ......... On ................. On
( 1) - A/C request switch is turned off.
( 2) - Approximate coolant temperature or less.
( 3) - Approximate coolant temperature or more.
( 4) - A/C request switch is turned on.









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NOTE: Operation of radiator and condenser fans is controlled by
vehicle Powertrain Control Module (PCM). Based on vehicle
speed, coolant temperature and A/C operation request, PCM
will command low, medium or high speed fan operation.
3000GT
1) If neither the radiator fan nor the condenser fan operate,
check fusible link No. 5 (40-amp). See WIRING DIAGRAMS. If only the
condenser fan does not operate, check dedicated fuse No. 8 (20-amp).
2) If the condenser fan operates in all speeds except low and
A/C compressor clutch does not enter the ON state, check for A/C
compressor lock controller unit output signal. If the A/C compressor
clutch does enter the ON state, check condenser fan low speed relay
operation.
3) If the radiator fan and the condenser fan operate in all
speeds except high, check PCM. See appropriate G - TESTS W/CODES
article in ENGINE PERFORMANCE. If fan operation is not as specified,
check wiring harness for opens or shorts. Repair as necessary.
* G - TESTS W/CODES - NON-TURBO - 1997
* G - TESTS W/CODES - TURBO - 1997
* G - TESTS W/CODES - 1998
4) To confirm radiator fan or condenser fan operation, see
appropriate FAN OPERATING MODE (3000GT) table. If fan operation is not\
as specified, check wiring harness for opens or shorts. Repair as
necessary.
FAN OPERATING MODE (3000GT)









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Power Circuit
Coolant Operating Radiator Condenser
Temp.
F (C) Low/High Fan Speed Fan Speed
50 MPH ( 1) ( 2)
203 (95) ( 2) ........ Off/Off ....... Off ................ Off
203-221 (95-105) ..... On/Off ....... Low ................ Off\
221 (105) ( 3) ........ On/On ........ High .............. High
50 MPH ( 1) ( 3)
221 (105) ( 2) ....... Off/Off ....... Off ................ Off
221 (105) ( 3) ........ On/On ........ High .............. High
All Speeds
221 (105) ( 2) ........ On/Off ....... Low ................ Low
221 (105) ( 3) ........ On/On ........ High .............. High

CRUISE CONTROL INDICATOR TEST under COMPONENT TESTS. If cruise control
indicator is defective, replace indicator. If indicator checks okay,
go to next step.
2) If cruise control indicator illuminates when cruise
control connector C-50 terminal No. 23 is grounded at harness side,
replace cruise control ECU. If indicator does not illuminate, check
combination meter connector C-12 and cruise control ECU connector C-
50. Repair as necessary. If connectors are okay and malfunction
remains, check harness between combination meter and cruise control
ECU. Repair as necessary.
Test No. 13
1) Perform stoplight switch test. See
BRAKELIGHT/STOPLIGHT SWITCH TEST under COMPONENT TESTS. If switch is
okay, go to next step. If switch is defective, replace brakelight
switch.
2) Check cruise control ECU connector C-50, stoplight switch
connector C-55 and joint connector C-131. Repair as necessary. See
Figs. 13 , 14, 16 and 29. If connectors are okay and malfunction
remains, check harness between joint connector C-131 and cruise
control ECU.
Test No. 14 (A/T)
1) Perform park/neutral switch test. See
PARK/NEUTRAL SWITCH TEST under COMPONENT TESTS. If switch is okay, go
to next step. If switch is defective, replace switch.
2) Check starter relay. Replace if defective. If relay is
okay, check cruise control ECU connector C-50 and joint connector C-
130. Repair as necessary. See Figs. 13, 16 and 28. If connectors are
okay and malfunction remains, check harness between cruise control ECU
and power supply.
COMPONENT TESTS
ACTUATOR TEST
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 as specified.
BRAKELIGHT/STOPLIGHT SWITCH TEST
Disconnect stoplight switch connector C-55. When brake pedal
is pressed, continuity should be present between terminals No. 2 and
3. See Fig. 14. When brake pedal is released, continuity should be
present between terminals No. 1 and 4. Replace switch if it does not
test as specified.
CLOCKSPRING TEST
WARNING: Deactivate air bag system before performing any service
operation. See AIR BAG RESTRAINT SYSTEMS article. Do not
apply electrical power to any component on steering column
without first deactivating air bag system. Air bag may
deploy.
If clockspring fails any check, replace with a NEW
clockspring.
1) Check connectors and protective tube for damage and
deformities.
2) Visually check case for damage or deformities.

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

NOTE: The following information only applies to Eclipse and Galant.
NOTE: Perform INPUT SIGNAL INSPECTION before proceeding with
SYSTEM TESTS. To identify circuit connector terminals, see
WIRING DIAGRAMS .
Communication With All Systems Not Possible (Eclipse &
Galant)
1) Check voltage between ground and Data Link Connector (DLC)\
terminal No. 16 (Red/Black wire on Eclipse or Brown/Red wire on
Galant). See Fig. 1. If battery voltage is present, go to step 3). If
battery voltage is not present, go to next step.
2) Check junction block connectors between DLC and power
supply. See WIRING DIAGRAMS . If connectors are okay, check circuit
between power supply and DLC. See WIRING DIAGRAMS. Repair as
necessary.
3) Check continuity between ground and DLC terminals No. 4
and 5. If continuity is present, replace scan tool and retest. If
continuity is not present, check circuit between ground and DLC. See
WIRING DIAGRAMS . Repair as necessary.
Communication With One-Shot Pulse Input Signal Only Is Not
Possible (Eclipse & Galant)
Check circuit between DLC and junction block No. 1. See
WIRING DIAGRAMS . Repair as necessary. If circuit is okay, check
harness connectors to ETACS-ECU, DLC and junction/joint connectors.
Repair as necessary. If connectors are okay, replace ECU.
Defogger Does Not Operate With Defogger Switch ON (Eclipse &
Galant)
1) Check defogger switch input signal. See
INPUT SIGNAL INSPECTION . If switch input signal is okay, check
defogger circuit and relay. See DEFOGGER RELAY TEST under COMPONENT
TESTS. Repair or replace as necessary. If switch input signal is not
okay, go to next step.
2) Check defogger switch. See DEFOGGER SWITCH TEST under
COMPONENT TESTS. Replace as necessary. If defogger switch is okay,
turn ignition on. Check voltage between ground and defogger switch
harness-side connector terminal No. 4 (Eclipse) or terminal No. 2
(Galant). See WIRING DIAGRAMS . If voltage reading is 5 volts (Eclipse)
or battery voltage (Galant), go to next step. If voltage reading is
not as specified, go to step 4).
3) Check joint/junction connectors between switch, instrument
panel cluster and ETACS-ECU. See WIRING DIAGRAMS. Repair as necessary.
If connectors are okay, check circuit between defogger switch and
ground. Repair as necessary. If circuit is okay, replace ECU.
4) Check harness connectors to ETACS-ECU and instrument panel
cluster. Repair as necessary. If connectors are okay, check circuit
between ECU and defogger switch. Repair as necessary.
Defogger Relay Circuit System Check (Eclipse & Galant)
1) Check defogger relay. See DEFOGGER RELAY TEST under
COMPONENT TESTS. Replace as necessary. If relay is okay, go to next
step.
2) Check voltage between ground and relay harness-side
connector terminals No. 3 and 5. See WIRING DIAGRAMS. If battery
voltage is present, go to next step. If battery voltage is not
present, go to step 4).
3) Check harness connectors to relay, ETACS-ECU, junction
block and rear wiring/liftgate. See WIRING DIAGRAMS. Repair as
necessary. If connectors are okay, check circuit between defogger
relay and rear defogger, defogger and ground, or defogger relay and
ECU. See WIRING DIAGRAMS . Repair as necessary. If circuits are okay,

replace ECU.
4) Check harness connectors to junction block and ignition
switch. Repair as necessary. If connectors are okay, check circuit
between ignition switch and junction block, and between fusible link
No. 2 and junction block. See WIRING DIAGRAMS. Repair as necessary.
COMPONENT TESTS
DEFOGGER RELAY TEST
Diamante & Eclipse
1) Remove defogger relay. See COMPONENT LOCATIONS. Ground
relay terminal No. 1, and apply battery voltage to terminal No. 3. See
Fig. 2 . Check relay continuity using ohmmeter.
2) Continuity should exist between terminals No. 2 and 5.
With voltage disconnected, continuity should not exist between
terminals No. 2 and 5. Ensure continuity exists between terminals No.
1 and 3. If continuity is not as specified, replace relay.
Galant, Mirage & Montero Sport
1) Remove defogger relay. See COMPONENT LOCATIONS. Ground
relay terminal No. 3, and apply battery voltage to terminal No. 1. See
Fig. 2 . Check relay continuity using ohmmeter.
2) Continuity should exist between terminals No. 2 and 5.
With voltage disconnected, continuity should not exist between
terminals No. 2and 5. Ensure continuity exists between terminals No. 1
and 3. If continuity is not as specified, replace relay.
Montero
1) Remove defogger relay. See COMPONENT LOCATIONS. Ground
relay terminal No. 3 and apply battery voltage to terminal No. 1. See
Fig. 3 . Check relay continuity using ohmmeter.
2) Continuity should exist between terminals No. 4 and 5.
With voltage disconnected, continuity should not exist between
terminals No. 4and 5. Ensure continuity exists between terminals No. 1
and 3. If continuity is not as specified, replace relay.
3000GT
1) Remove defogger relay. See COMPONENT LOCATIONS. Ground
relay terminal No. 3, and apply battery voltage to terminal No. 5. See
Fig. 4 . Check relay continuity using ohmmeter.
2) Continuity should exist between terminals No. 1 and 2.
With voltage disconnected, continuity should not exist between
terminals No. 1and 2. Ensure continuity exists between terminals No. 3
and 5. If continuity is not as specified, replace relay.
Fig. 2: Identifying Defogger Relay Terminals (Diamante, Eclipse,
Galant, Mirage & Montero Sport)
Courtesy of Mitsubishi Motor Sales of America