1998 MITSUBISHI MONTERO battery

ELECTRIC COOLING FAN
COMPONENT TESTING
Radiator Fan Motor (Diamante)
1) Disconnect radiator fan motor connectors A39 and A40.
Ground fan motor connector A39 terminal No. 2 (Black wire). Using a
fused jumper wire, connect battery voltage to fan motor connector A39
terminal No. 1 (Blue/Black wire). See Fig. 7. See WIRING DIAGRAMS. Fan
motor should operate at low speed with no abnormal noises or
interferences. Repair or replace components as necessary.
2) Ground fan motor connector A39 terminal No. 2 (Black wire)\
and connector A40 terminal No. 2 (Black wire). Using a fused jumper
wire, connect battery voltage to fan motor connector A39 terminal No.
1 (Blue/Black wire). See Fig. 7. See WIRING DIAGRAMS. Fan motor should
operate at medium speed with no abnormal noises or interferences.
Repair or replace components as necessary.
3) Ground fan motor connector A39 terminal No. 2 (Black wire)\
and connector A40 terminal No. 2 (Black wire). Using 2 fused jumper
wires, connect battery voltage to fan motor connector A39 terminal No.
1 (Blue/Black wire) and to connector A40 terminal No. 1 (Green wire)\
.
See Fig. 7. See WIRING DIAGRAMS. Fan motor should operate at high
speed with no abnormal noises or interferences. Repair or replace
components as necessary.
Fig. 7: Testing Radiator Fan Motor (Diamante)
Courtesy of Mitsubishi Motor Sales of America.
Radiator Fan Motor (Eclipse)
1) Disconnect radiator fan motor 4-pin connector. Ground fan

motor connector terminal No. 2 (Black wire). Using a fused jumper
wire, connect battery voltage to fan motor connector terminal No. 1
(White/Black wire). See WIRING DIAGRAMS. Fan motor should operate with
no abnormal noises or interferences. Repair or replace components as
necessary.
2) On all models except 1998 2.0L non-turbo, ground fan motor
4-pin connector terminal No. 4 (Black wire). Using a fused jumper
wire, connect battery voltage to fan motor connector terminal No. 3
(White/Blue wire). See WIRING DIAGRAMS. Fan motor should operate with
no abnormal noises or interferences. Repair or replace components as
necessary.
Radiator Fan Motor (Galant)
1) Disconnect radiator fan motor 4-pin connector. Ground fan
motor connector terminal No. 2 (Black wire). Using a fused jumper
wire, connect battery voltage to fan motor connector terminal No. 1
(Blue wire). See WIRING DIAGRAMS. Fan motor should operate with no
abnormal noises or interferences. Repair or replace components as
necessary. If no problems exist, go to next step.
2) Ground fan motor 4-pin connector terminal No. 4 (Black
wire). Using a fused jumper wire, connect battery voltage to fan motor
connector terminal No. 3 (Blue/Black wire). See WIRING DIAGRAMS. Fan
motor should operate with no abnormal noises or interferences. Repair
or replace components as necessary.
Radiator Fan Motor (Mirage)
Disconnect radiator fan motor 2-pin connector. Ground fan
motor 2-pin connector terminal No. 2 (Black wire). Using a fused
jumper wire, connect battery voltage to 2-pin connector terminal No. 1
(Blue/Black wire). See WIRING DIAGRAMS. Fan motor should operate with
no abnormal noises or interferences. Repair or replace components as
necessary.
Radiator Fan Motor (3000GT)
1) Disconnect radiator fan motor 4-pin connector. Ground fan
motor connector terminal No. 4 (Blue/Green wire). Using a fused jumper\
wire, connect battery voltage to fan motor connector terminal No. 2
(Red/Black wire). See WIRING DIAGRAMS. Fan motor should operate with
no abnormal noises or interferences. Repair or replace components as
necessary. If radiator fan motor operates as specified, go to next
step.
2) Disconnect battery voltage and ground from radiator fan
motor 4-pin connector. Using an ohmmeter, measure resistance between
radiator fan motor 4-pin connector terminals No. 1 (Black wire) and
No. 3 (Yellow/Blue wire). See WIRING DIAGRAMS. Resistance should be 0.
29-0.35 ohms. Replace radiator fan motor if resistance is not as
specified.
Condenser Fan Motor (Diamante)
1) Using a fused jumper wire, connect battery voltage to
condenser fan motor 4-pin connector terminal No. 1 (Blue/White wire).
Connect ground to connector terminal No. 2 (Black wire). Fan motor
should operate with no abnormal noises or interferences. Repair or
replace components as necessary. If no problems exist, go to next
step.
2) Using a fused jumper wire, connect battery voltage to
condenser fan motor 4-pin connector terminal No. 3 (Yellow wire). When\
terminal No. 4 (Black wire) is connected to ground, condenser fan
should operate faster. Replace condenser fan if operation is not as
specified. Ensure there are no abnormal noises or interferences during
fan operation.
Condenser Fan Motor (Eclipse)

1) Using a fused jumper wire, connect battery voltage to
condenser fan motor 4-pin connector terminal No. 1 (Blue wire).
Connect ground to connector to terminal No. 4 (Black wire). Fan motor
should operate with no abnormal noises or interferences. Repair or
replace components as necessary. If no problems exist, go to next
step.
2) Using a fused jumper wire, connect battery voltage to
condenser fan motor 4-pin connector terminal No. 3 (Blue/White wire).
When terminal No. 2 (Black wire) is connected to ground, condenser fan\
should operate faster. Replace condenser fan if operation is not as
specified. Ensure there are no abnormal noises or interferences during
fan operation.
Condenser Fan Motor (Galant)
1) Using a fused jumper wire, connect battery voltage to
condenser fan motor 4-pin connector terminal No. 1 (Blue wire).
Connect ground to connector to terminal No. 2 (Black wire). Fan motor
should operate with no abnormal noises or interferences. Repair or
replace components as necessary. If no problems exist, go to next
step.
2) Using a fused jumper wire, connect battery voltage to
condenser fan motor 4-pin connector terminal No. 3 (Blue/White wire).
When terminal No. 4 (Black wire) is connected to ground, condenser fan\
should operate faster. Replace condenser fan if operation is not as
specified. Ensure there are no abnormal noises or interferences during
fan operation.
Condenser Fan Motor (Mirage)
Disconnect radiator fan motor 2-pin connector. Ground fan
motor 2-pin connector terminal No. 2 (Black/Blue wire). Using a fused
jumper wire, connect battery voltage to 2-pin connector terminal No. 1
(Black/Orange wire). See WIRING DIAGRAMS. Fan motor should operate
with no abnormal noises or interferences. Repair or replace components
as necessary.
Condenser Fan Motor (Montero & Montero Sport)
Disconnect radiator fan motor 2-pin connector. Ground fan
motor 2-pin connector terminal No. 1 (Blue/Black wire). Using a fused
jumper wire, connect battery voltage to 2-pin connector terminal No. 2
(Blue/White wire). See WIRING DIAGRAMS. Fan motor should operate with
no abnormal noises or interferences. Repair or replace components as
necessary.
Condenser Fan Motor (1997 3000GT)
1) Disconnect both condenser fan motor 2-pin connectors
located on driver side of radiator. Ground fan motor 2-pin connector
terminal No. 2 (Black wire). Using a fused jumper wire, connect
battery voltage to 2-pin connector terminal No. 1 (Blue wire). See
WIRING DIAGRAMS . Fan motor should operate with no abnormal noises or
interferences. Repair or replace components as necessary. If no
problems exist, go to next step.
2) Ground fan motor 2-pin connector terminal No. 2
(Blue/Black wire). Using a fused jumper wire, connect battery voltage
to 2-pin connector terminal No. 1 (Blue/White wire). See
WIRING DIAGRAMS . Fan motor should operate with no abnormal noises or
interferences. Repair or replace components as necessary.
Condenser Fan Motor (1998 3000GT)
1) Disconnect condenser fan motor 3-pin connector located on
driver-side of radiator. Ground fan motor 2-pin connector terminal No.
3 (Black wire). Using a fused jumper wire, connect battery voltage to
3-pin connector terminal No. 1 (Blue/White wire). See WIRING DIAGRAMS.
Fan motor should operate with no abnormal noises or interferences.

Repair or replace components as necessary. If no problems exist, go to
next step.
2) Ground fan motor 3-pin connector terminal No. 3 (Black
wire). Using a fused jumper wire, connect battery voltage to 3-pin
connector terminal No. 2 (Blue wire). See WIRING DIAGRAMS. Fan motor
should operate with no abnormal noises or interferences. Repair or
replace components as necessary.
Engine Coolant Temperature (ECT) Sensor
Remove ECT sensor from vehicle. Suspend sensor in water so
that sensor does not touch container. Slowly heat water. Using an
ohmmeter, check sensor continuity as temperature increases. Replace
ECT sensor if resistance is not as specified. See
ENGINE COOLANT TEMPERATURE SENSOR RESISTANCE table.
ENGINE COOLANT TEMPERATURE SENSOR RESISTANCE









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Temperature F (C) Ohms
Diamante, Eclipse 2.0L Turbo & 2.4L
32 (0) ................................................. 5100-6500\
68 (20) ................................................ 2100-2700\
104 (40) ................................................ 900-1300\
176 (80) ................................................. 260-360\
Eclipse Non-Turbo
77 (25) ................................................. 900-1100\
212 (100) ................................................ 600-800\
Galant & Mirage
68 (20) ................................................ 2100-2700\
176 (80) ................................................. 260-360\
Montero
68 (20) ................................................ 2130-2610\
176 (80) ................................................. 258-322\
Montero Sport
68 (20) ................................................ 2100-2700\
176 (80) ................................................. 260-360\
3000GT
32 (0) ...................................................... 5800\
68 (20) ..................................................... 2400\
104 (40) .................................................... 1100\
176 (80) ..................................................... 300\









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Electric Cooling Fan Relay (Diamante, Eclipse, Galant &
Mirage)
1) Remove radiator fan motor relay from relay box located at
right side of engine compartment. Check for continuity between relay
terminals No. 1 and 3. If continuity exists, go to next step. If
continuity does not exist, replace cooling fan relay. See Fig. 8.
2) Using a fused jumper wire, connect battery voltage to
cooling fan relay terminal No. 1. Using another jumper wire, connect
cooling fan relay terminal No. 3 to battery ground. With cooling fan
relay energized, there should be continuity between cooling fan relay
terminals No. 4 and 5. With cooling fan relay not energized, there
should be no continuity between terminals No. 4 and 5. If continuity
does not exist as specified, replace cooling fan relay. See Fig. 8.
Electric Cooling Fan Relay (Montero, Montero Sport & 3000GT)
1)Remove relay from relay box in engine compartment relay
box. Check for continuity between relay terminals No. 2 and 4. If
continuity exists, go to next step. If continuity does not exist,
replace cooling fan relay. See Fig. 9.
2) Using a fused jumper wire, connect battery voltage to

cooling fan relay terminal No. 2. Using another jumper wire, connect
cooling fan relay terminal No. 4 to battery ground. With cooling fan
relay energized, there should be continuity between cooling fan relay
terminals No. 1 and 3. With cooling fan relay not energized, there
should be no continuity between terminals No. 1 and 3. If continuity
does not exist as specified, replace cooling fan relay. See Fig. 9.
Fig. 8: Testing Electric Cooling Fan Relay (Diamante, Eclipse,
Galant & Mirage)
Courtesy of Mitsubishi Motor Sales of America.

Fig. 25: Identifying Cruise Control Circuit Connector Terminals:
Closed Throttle Switch & Throttle Position Sensor Connector
Courtesy of Mitsubishi Motor Sales of America
INSPECTION PROCEDURES FOR TROUBLE SHOOTING SYMPTOMS
Test No. 1
Defect in power supply system (including ground) for
diagnostic line may be possible. Probable causes are:
* Malfunction of connector.
* Malfunction of harness.
1) Check voltage between data link connector pin No. 16 and
ground. See Fig. 35. If battery voltage is present, go to next step.
If battery voltage is not present, check junction block connectors C-
81 and C-94. See Figs. 19, 21, 26 and 27. If connectors are defective,
repair as necessary. If connectors are okay and malfunction remains,
check harness between power supply and data link connector. Repair as
necessary.
2) At data link connector, measure continuity between pin No.
4 and ground and pin No. 5 and ground. If continuity is present,
replace scan tool. If continuity is not present, check data link
connector for damage or loose connections. Repair as necessary. If
connector is okay and malfunction remains, check harness between data
link connector and ground. Repair as necessary.

Fig. 30: Identifying Junction Block Connectors & Joint Connectors:
Joint Connector C-132
Courtesy of Mitsubishi Motor Sales of America
Test No. 2
Malfunction of cruise control main switch or cruise control
ECU ground circuit may be present. Probable causes are:
* Malfunction of cruise control main switch.
* Malfunction of connector.
* Malfunction of harness.
* Malfunction of cruise control ECU.
1) Check cruise control main switch. See
CRUISE CONTROL SWITCH TESTS under COMPONENT TESTS. If switch is okay,
go to next step. If switch is defective, repair or replace as
necessary.
2) Disconnect main switch connector C-01. See Fig. 8. At
harness side of connector, measure voltage between connector terminal
No. 1 and ground. If battery voltage is present, go to next step. If
battery voltage is not present, check condition of junction block
connectors C-94 and C-101. If connector(s) are defective, repair as
necessary. If connectors are okay and malfunction remains, check
harness between cruise control main switch and power supply. Repair as
necessary.
3) Check condition of cruise control main switch connector C-
01, joint connector C-132 and cruise control ECU connector C-50.
Repair as necessary. If connectors are okay and malfunction remains,
check harness between cruise control main switch and ground, and
between main switch and cruise control ECU. Repair as necessary.
4) Disconnect cruise control ECU connector C-50. See Fig. 13.
Check for continuity between ground and connector terminals No. 6, 8,
and 14. If continuity is present, go to next step. If continuity is
not present, check condition of connectors between front wiring

harness, dash wiring harness and joint connector C-132. Repair as
necessary. If malfunction remains, check harness between cruise
control main switch and power supply. Repair as necessary.
5) Check condition of cruise control ECU connector C-50.
Repair as necessary. If connector is okay and malfunction persists,
replace cruise control ECU.
Test No. 3
Malfunction of cruise control main switch or cruise control
ECU ground circuit may be present. Probable causes are:
* Malfunction of cruise control main switch.
* Malfunction of clockspring.
* Malfunction of connector.
* Malfunction of harness.
1) Check cruise control switches. See
CRUISE CONTROL SWITCH TESTS under COMPONENT TESTS. Replace any failed
switch. If switches are okay, check clockspring. See CLOCKSPRING TEST
under COMPONENT TESTS. If clockspring is okay, go to next step.
Replace clockspring if not okay.
2) Disconnect clockspring connector C-128 and measure voltage
between terminal No. 2 and ground. See Fig. 15. If battery voltage is
present, go to next step. If battery voltage is not present, check
condition of IOD connector A-09X, joint connector C-131, junction
block connector C-81, junction block connector C-94 and junction block
connector C-101. Repair as necessary. See Figs. 4, 16, 19, 21, 22, 26,
27 and 29. If connectors are okay and malfunction remains, check
harness between clockspring and power supply. Repair as necessary.
3) Check condition of cruise control ECU connector C-50 and
clockspring connector C-128. Repair as necessary. See Figs. 13 and 15.
If connectors are okay and malfunction remains, check harness between
clockspring and cruise control ECU. Repair as necessary.
Test No. 4
Malfunction of stoplight switch or stoplight circuit may be
present. Probable causes are:
* Malfunction of stoplight switch.
* Malfunction of connector.
* Malfunction of harness.
* Malfunction of cruise control ECU.
1) If stoplight does not illuminate with brake pedal
depressed, go to next step. If stoplight illuminates with pedal
depressed, replace cruise control ECU.
2) Check stoplight switch. See
BRAKELIGHT/STOPLIGHT SWITCH TEST under COMPONENT TESTS. Replace
stoplight switch as necessary. If stoplight switch is okay, go to next
step.
3) Disconnect stoplight switch connector C-55. See Fig. 14.
At harness side of connector, measure voltage between terminal No. 2
and ground. If battery voltage is present, go to next step. If battery
voltage is not present, check condition of joint connector C-131 and
junction block connector C-94. Repair as necessary. See Fig. 26. If
connectors are okay and malfunction remains, check harness between
stoplight switch and power supply. Repair as necessary.
4) Check condition of cruise control ECU connector C-50 and
stoplight switch connector C-55. Repair as necessary. If connectors
are okay and malfunction remains, check harness between stoplight
switch and cruise control ECU. Repair as necessary.
Test No. 5