open MITSUBISHI MONTERO 1998 Workshop Manual
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![MITSUBISHI MONTERO 1998 Workshop Manual COOLING SYSTEM SPECIFICATIONS \
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COOLING SYSTEM SPECIFICATIONS \
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Application Specification
Coolant Replacement Interval ............. 30,000 Miles Or 24 Months
Coolant Capacity (Includes Heater & Reserve Tank)
Diamante ........................................ 10.0 Qts. (9.5L)\
Eclipse .......................................... 7.4 Qts. (7.0L)\
Galant ........................................... 7.4 Qts. (7.0L)\
Mirage
1.5L ........................................... 5.3 Qts. (5.0L)\
1.8L ........................................... 6.3 Qts. (6.0L)\
Montero ......................................... 10.0 Qts. (9.5L)\
Montero Sport
2.4L
With Rear Heater ............................. 9.5 Qts. (9.0L)\
Without Rear Heater .......................... 8.5 Qts. (8.0L)\
3.0L
With Rear Heater ........................... 10.6 Qts. (10.0L)\
Without Rear Heater .......................... 9.5 Qts. (9.0L)\
3000GT ........................................... 8.5 Qts. (8.0L)\
Pressure Cap
Except Eclipse 2.0L Non-Turbo .......................... 11-15 psi
Eclipse 2.0L Non-Turbo ................................. 14-18 psi
Thermostat Opens
Diamante
1997
Starts To Open .................................. 180
F (82C)
Fully Open ...................................... 203F (95C)
1998
Starts To Open .................................. 192
F (89C)
Fully Open ...................................... 203F (95C)
Eclipse
2.0L Turbo & 2.4L
Starts To Open .................................. 180
F (82C)
Fully Open ...................................... 203F (95C)
2.0L Non-Turbo
Starts To Open ................................ 195
F (90.5C)
Fully Open ..................................... 216F (102C)
Galant
Starts To Open .................................... 180
F (82C)
Fully Open ........................................ 203F (95C)
Mirage
Starts To Open ......................... 177-183
F (80.5-83.9C)
Fully Open ........................................ 203F (95C)
Montero
1997
Starts To Open .................................. 180
F (82C)
Fully Open ...................................... 203F (95C)
1998
Starts To Open .................................. 190
F (88C)
Fully Open ..................................... 212F (100C)
Montero Sport
Starts To Open ......................... 177-183
F (80.5-83.9C)
Fully Open ........................................ 203F (95C)
3000GT (SOHC)
Starts To Open .................................... 180
F (82C)
Fully Open ........................................ 203F (95C)
3000GT (DOHC)
Starts To Open .................................... 170
F (77C)
Fully Open ........................................ 194F (90C) \
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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
Page 283 of 1501
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
Page 285 of 1501
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
Page 286 of 1501
![MITSUBISHI MONTERO 1998 Workshop Manual necessary.
FAN OPERATING MODE (MIRAGE)
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FAN OPERATING MODE (MIRAGE)
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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
Page 317 of 1501
An open circuit in output signal circuit in Neutral range is
likely reason for malfunction. Probable causes are:
* Malfunction of park/neutral switch.
* Malfunction of connector.
* Malfunction of harness.
* Malfunction of cruise control ECU.
Check condition of park/neutral switch connector B-08, dash
harness/transmission harness connector C-124, cruise control ECU
connector C-50 and joint connector C-130. Repair as necessary. If
connectors are okay and malfunction remains, check harness between
park/neutral switch and cruise control ECU. Repair as necessary. If
harness is okay, replace cruise control ECU.
Test No. 6
An open circuit in circuit inside CANCEL switch is likely
caused by a malfunction in cruise control switch. Replace cruise
control switch.
Test No. 7
Because of an open circuit in battery back-up circuit system,
fail-safe function prevents diagnostic trouble codes from being
memorized and displayed even though cruise control is canceled.
Probable causes are:
* Malfunction of connector.
* Malfunction of harness.
* Malfunction of cruise control ECU.
1) Disconnect cruise control ECU connector C-50. See Fig. 13.
At harness side of connector, measure voltage between terminal No. 16
and ground. If battery voltage is present, go to next step. If battery
voltage is not present, check and repair IOD connector A-09X, joint
connector C-132, junction block connector C-81 and junction block
connector C-93 as necessary. See Figs. 4, 16, 19, 20, 26 and 30. If
connectors are okay and malfunction remains, check harness between
cruise control ECU and power supply. Repair as necessary.
2) Check condition of cruise control ECU connector C-50.
Repair as necessary. If connector is okay and malfunction remains,
replace cruise control ECU.
Test No. 8
A malfunction of switches or fail-safe function cancelling
cruise control may be present. Probable causes are:
* Malfunction of cruise control main switch.
* Malfunction of cruise control switch.
* Malfunction of clockspring.
* Malfunction of harnesses or connectors.
* Malfunction of park/neutral position switch.
* Malfunction of cruise control ECU.
1) Attach scan tool to DLC. If scan tool can communicate with
cruise control, go to next step. If scan tool cannot communicate with
cruise control, go to TEST NO. 2.
2) If input switch inspection is possible with scan tool, go
to next step. If input switch inspection is not possible, go to TEST
NO. 3.
3) If input switch Code 21, 22 or 27 are still displayed,
replace cruise control main switch. If codes are no longer displayed,
go to next step.
4) If input switch Code 23 is still displayed, go to TEST NO.
Page 322 of 1501
Throttle Position Sensor
1) Disconnect sensor connector. Resistance between terminals
No. 1 and 4 should be 3500-6500 ohms. Use an analog ohmmeter to
measure resistance between terminals No. 1 and 3. See Fig. 25.
2) Slowly open throttle valve to wide open throttle.
Resistance should change smoothly as throttle is opened. Replace
throttle position sensor if it does not test as specified.
CRUISE CONTROL INDICATOR TEST
With combination meter (instrument cluster) removed, check
for continuity between terminals No. 4 and 5. See Fig. 33. If there is
no continuity, replace cruise control indicator bulb.
Fig. 33: Identifying Combination Meter Connector
Courtesy of Mitsubishi Motor Sales of America
CRUISE CONTROL SWITCH TESTS
CANCEL, SET & RESUME Switches
1) Remove lower steering column cover. Disconnect 2-pin
switch connector. Operate and test switch. When CANCEL switch is
operated between terminals No. 1 and 2, zero ohms resistance should be
indicated.
2) When RESUME switch is operated, 820 ohms resistance should
be present between terminals No. 1 and 2. When SET switch is operated,
2700 ohms resistance should be present between terminals No. 1 and 2.
Replace cruise control switch if it does not test as specified.
Page 339 of 1501
manufacturer's original setting has been changed.
1) Loosen throttle cable. Loosen fixed SAS lock nut. See
Fig. 7. Turn fixed SAS counterclockwise until throttle valve is fully
closed. Turn fixed SAS clockwise until throttle valve begins to open.
Turn fixed SAS clockwise 1 1/4 turns after throttle valve begins to
open.
2) Tighten lock nut while holding fixed SAS in position.
Adjust throttle cable. Adjust basic idle speed. See BASIC IDLE SPEED.
Adjust Throttle Position (TP) sensor. See TP SENSOR ADJUSTMENT under
THROTTLE POSITION (TP) SENSOR.
Fig. 7: Adjusting Fixed Speed Adjusting Screw (Typical)
Courtesy of Mitsubishi Motor Sales of America
IDLE MIXTURE
NOTE: Idle mixture is computer controlled on fuel injected engines
and is nonadjustable. CO level should not exceed .5%. HC
level should not exceed 100 ppm. If mixture levels exceed
limits, see G - TESTS W/CODES article.
THROTTLE POSITION (TP) SENSOR
TP SENSOR ADJUSTMENT
NOTE: Ensure basic idle speed is set to specification before
adjusting TP sensor. See BASIC IDLE SPEED under IDLE SPEED &
Page 340 of 1501
MIXTURE. Perform all adjustments with engine at normal
operating temperature, front wheels in straight-ahead
position, cooling fan and all accessories off, and
transmission in Park or Neutral.
Eclipse 2.0L Non-Turbo
1) TP sensor is not adjustable. Disconnect TP sensor
connector. Using external ohmmeter, measure resistance between TP
sensor terminals No. 1 and 3. See Fig. 8. If resistance is not 3500-
6500 ohms, replace TP sensor.
2) While slowly rotating throttle valve from idle to full
open, measure resistance between TP sensor terminals No. 2 and 3. If
resistance does not change smoothly in proportion to throttle opening,
replace TP sensor.
Montero
1) Disconnect TP sensor connector. Using jumper wires,
connect an external ohmmeter between TP sensor terminals No. 1 and 2.
See Fig. 9 . Insert .025" (.65 mm) feeler gauge between fixed speed
adjusting screw and throttle lever.
2) Loosen TP sensor mounting screws and rotate TP sensor
fully clockwise. Ensure there is continuity between terminals No. 1
and 2. Rotate TP sensor counterclockwise until there is no continuity,
and tighten screws. Install Test Harness (MB991348) between TP sensor
and harness connector.
3) Turn ignition on. Using external voltmeter, measure TP
sensor output voltage between terminals No. 1 and 3. If voltage is not
.4-1.0 volt, check harness and sensor. See DTC P0120 in G - TESTS
W/CODES article.
All Other Models
1) Disconnect TP sensor connector. Using jumper wires,
connect an external ohmmeter between TP sensor terminals No. 1 and 2
on Diamante or No. 3 and 4 on all other models. See Fig. 9. On
Diamante and Mirage 1.8L with cruise control, insert .055" (1.40mm)
feeler gauge between fixed speed adjusting screw and throttle lever.
On Galant, insert .025" (.65 mm) feeler gauge between fixed speed
adjusting screw and throttle lever. On all other models, insert .018"
(.45 mm) feeler gauge between fixed speed adjusting screw and throttle\
lever.
2) Loosen TP sensor mounting screws and rotate TP sensor
fully counterclockwise. Ensure there is continuity between terminals
No. 1 and 2 on Diamante, or No. 3 and 4 on all other models. Rotate TP
sensor clockwise until there is no continuity and tighten screws.
Install Test Harness (MB991348) between TP sensor and harness
connector.
3) Turn ignition on. Using external voltmeter, measure TP
sensor output voltage between terminals No. 1 and 3 on Diamante, or
No. 2 and 4 on all other models. If voltage is not .4-1.0 volt, check
harness and sensor. See DTC P0120 in G - TESTS W/CODES article.
Fig. 8: TP Sensor Connector Terminals (Eclipse 2.0L Non-Turbo)
Courtesy of Mitsubishi Motor Sales of America
Page 342 of 1501
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