1998 MITSUBISHI MONTERO engine

A/C SWITCH
Removal & Installation
Lower glove box. Remove instrument cover. Remove lap cooler
and foot shower ducts. Remove center panel and A/C-heater control
panel. Remove bezel and knob. Disconnect A/C switch connector, and
remove A/C switch. To install, reverse removal procedure.
A/C ENGINE COOLANT TEMPERATURE SWITCH
Removal & Installation
Drain coolant below level of thermostat housing. See Fig. 8.
Remove A/C engine coolant temperature switch wiring harness connector,
and unscrew A/C engine coolant temperature switch from thermostat
housing. To install, reverse removal procedure. Tighten A/C engine
coolant temperature switch to specification. See TORQUE SPECIFICATIONS
. Add coolant and check for leaks.
Fig. 8: Locating A/C Engine Coolant Temperature Switch
Courtesy of Mitsubishi Motor Sales of America.
BLOWER MOTOR & RESISTOR
Removal & Installation
Remove right side foot shower duct. Disconnect blower and/or
resistor. Remove blower motor and/or resistor. See Fig. 9. To install,
reverse removal procedure.

Removal & Installation
1) Discharge A/C system, using approved refrigerant
recovery/recycling equipment. Remove front grille and grille brackets.
Remove hood latch bracket mounting bolt. Remove hood latch brace.
Remove A/T oil cooler and engine oil cooler mounting bolts and
brackets.
2) Remove receiver bracket and receiver. Remove condenser fan
motor. Disconnect pressure lines from condenser. Remove condenser
mounting bolts. Lift condenser from vehicle. To install, reverse
removal procedure. See Fig. 11. If replacing condenser, add 1.4 ounces
of refrigerant oil to new condenser.
Fig. 11: Exploded View Of Condenser & Condenser Fan Motor
Courtesy of Mitsubishi Motor Sales of America.
EVAPORATOR ASSEMBLY

Removal & Installation
1) Discharge A/C system, using approved refrigerant
recovery/recycling equipment. Remove glove box with lower frame
attached. Loosen duct joint bolt to free duct joint. Disconnect A/C
switch harness. Disconnect evaporator drain hose.
2) Disconnect refrigerant lines at firewall side of engine
compartment. Remove evaporator top bolts in passenger compartment.
Remove evaporator assembly. To install, reverse removal procedure. See
Figs. 12 and 13. If replacing evaporator, add 1.4 ounces of
refrigerant oil to new evaporator.
Fig. 12: Removing Evaporator Assembly
Courtesy of Mitsubishi Motor Sales of America.

Removal & Installation
Discharge A/C system, using approved refrigerant
recovery/recycling equipment. Disconnect refrigerant temperature
sensor wiring connector. Remove temperature sensor from compressor. To
install, reverse removal procedure. Use new "O" ring on temperature
sensor.
TORQUE SPECIFICATIONS
TORQUE SPECIFICATIONS TABLE








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Application Ft. Lbs. (N.m)
A/C Compressor Bolt/Nut .................... 17-20 (23-27)
A/C Compressor Bracket Bolt/Nut .................. 37 (50)
A/C Compressor Clutch Coil Nut ................... 12 (16)
A/C Engine Coolant Temperature Switch ............ 26 (35)
INCH Lbs. (N.m)
Blower Motor Bolts/Nuts ........................... 44 (5)
Condenser Bolts/Nuts ............................ 106 (12)
Dual-Pressure Switch ............................. 89 (10)
Evaporator Assembly Bolts/Nuts .................... 44 (5)
Heater Assembly Bolts/Nuts ........................ 44 (5)









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WIRING DIAGRAMS

A/C SYSTEM GENERAL SERVICING
1998 Mitsubishi Montero
1998 AIR CONDITIONING & HEAT
Mitsubishi - A/C System General Servicing
Diamante, Eclipse, Galant, Mirage, Montero, Montero Sport &
3000GT
A/C COMPRESSOR APPLICATIONS
A/C COMPRESSOR APPLICATION TABLE








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Application Compressor
Diamante ......................... Sanden MSC105CVS Scroll
Eclipse
2.0L Non-Turbo ............. Nippondenso 10PA17C 10-Cyl.
2.0L Turbo & 2.4L .............. Sanden MSC105CVS Scroll
Galant ............................ Sanden MSC90C12 Scroll
Mirage ............................... Sanden MSC90 Scroll
Montero ....................... Nippondenso 10PA15 10-Cyl.
Montero Sport ...................... Sanden MSC105C Scroll
3000GT .............................. Sanden MSC105 Scroll









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USING R-12 & R-134a REFRIGERANT
HANDLING/SAFETY PRECAUTIONS
1) Always work in a well-ventilated, clean area. Avoid
breathing refrigerant vapors. Exposure may irritate eyes, nose and
throat. Refrigerant is colorless and is invisible as a gas.
Refrigerant is heavier than oxygen and will displace oxygen in a
confined area.
2) A/C system high pressure can cause severe injury to eyes
and skin if a hose were to burst. Always wear eye protection, gloves
and other protective clothing when working around A/C system and
refrigerant.
3) Refrigerant evaporates quickly when exposed to atmosphere,
freezing anything it contacts. If liquid refrigerant contacts eyes or
skin (frostbite), DO NOT rub eyes or skin. Immediately flush affected
area with cool water for 15 minutes and consult a doctor or hospital.
4) Never use R-134a in combination with compressed air for
leak testing. Pressurized R-134a in the presence of oxygen (air
concentrations greater than 60 percent by volume) may form a
combustible mixture. DO NOT introduce compressed air into R-134a
containers (full or empty), A/C system components or service
equipment.
5) DO NOT expose A/C system components to high temperatures,
steam cleaning for example, as excessive heat will cause
refrigerant/system pressure to increase. Never expose refrigerant
directly to open flame. If refrigerant needs to be warmed, place
bottom of refrigerant tank in warm water. Water temperature MUST NOT
exceed 125
F (52C).
CAUTION: When R-134a is exposed to an open flame, drawn into engine,
or detected with a Halide (propane) leak tester, a poisonous
gas is formed. Keep work areas well ventilated.
6) Use care when handling refrigerant containers. DO NOT
drop, strike, puncture or incinerate containers. Use Department Of

Symptom Inspection Procedure
Communication With All Systems Not Possible ............ 1
Communication With SRS Only Not Possible ............... 2
Ignition Switch On (Engine Stopped)
SRS Warning Light Does Not Come On ............... DTC 43
SRS Warning Light Stays On After 7 Seconds ...... DTC 43









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INSPECTION PROCEDURE 1
The cause is probably in power supply system (including
ground circuit of diagnostic line). Check connectors and harness, and
repair if necessary.
INSPECTION PROCEDURE 2
NOTE: Refer to WIRING DIAGRAMS for connector identification.
1) Before proceeding, see SERVICE PRECAUTIONS. Deactivate
SRS. See DISABLING & ACTIVATING AIR BAG SYSTEM .
2) Measure SRS Check Harness (MB991613) connector No. 5.
Disconnect SRS-ECU connector C-122 and connect SRS check harness
connector No. 3 to C-122. Check continuity between terminal No. 20, 21
and ground. If there is no continuity, go to next step. If there is
continuity, go to step 4).
3) Check connector C-122, and repair if necessary. If
connector is okay, check for trouble symptoms. If fault exists, check
harness between SRS-ECU and ground, and repair if necessary.
4) Measure SRS check harness connector No. 5. Disconnect SRS-
ECU connector C-122 and connect SRS harness check connector No. 3 to
C-122. Connect negative battery cable. Measure voltage between
terminal No. 13 and 14, and body ground. If voltage at terminals is 9
volts or more, check harness wire between SRS-ECU and Data Link
Connector (DLC), and repair if necessary. If harness wire is okay,
replace SRS-ECU. See SRS AIR BAG CONTROL UNIT (ECU) under REMOVAL &
INSTALLATION. If voltage is not as specified, check connector C-80, C-
93, C-101, and C-132, and repair if necessary. If connectors are okay,
check for trouble symptoms. If fault exists, check harness between
SRS-ECU and IG1 A or B (ignition switch), and repair if necessary.
Fig. 10: Identifying SRS Check Harness (MB991613) Connectors
Courtesy of Mitsubishi Motor Sales of America.
DTC 11, 12 & 13: FRONT IMPACT SENSOR SYSTEM

ANTI-LOCK BRAKE SYSTEM
1998 Mitsubishi Montero
1997-98 BRAKES
Mitsubishi - Anti-Lock
Montero
DESCRIPTION
CAUTION: See ANTI-LOCK BRAKE SAFETY PRECAUTIONS article in GENERAL
INFORMATION.
NOTE: For more information on brake system, see BRAKE SYSTEM
article.
The Anti-Lock Brake System (ABS) is designed to prevent wheel\
lock-up during heavy braking. This allows operator to maintain
steering control while stopping vehicle in shortest distance possible.
Major components are a hydraulic unit, wheel speed sensors, "G"
sensor, ABS Electronic Control Unit (ECU) and ANTI-LOCK warning light.\
ABS has a self-diagnostic system to indicate a system malfunction and
for use in system trouble shooting.
OPERATION
Each wheel sensor sends an AC electrical signal to the ECU.
The ECU reads this information as wheel speed. When any decelerating
wheel speed rate is determined to be excessive in comparison to other
monitored wheels, the hydraulic unit cycles hydraulic brake pressure
to each wheel to equalize speed of all wheels. ABS turns itself off
when vehicle drops to 4 MPH. Minor lock-up may occur at this point.
With engine running and vehicle speed greater than 4 MPH,
pump motor will operate for a short period of time and may be heard
inside vehicle. During pump motor operation, ABS system is completing
a self-check. During ABS system operation, a pulsing brake pedal and
vibration in steering wheel and vehicle body may be experienced. These
conditions are normal.
BLEEDING BRAKE SYSTEM
BLEEDING PROCEDURES
CAUTION: When adding brake fluid, ensure filter is properly fitted on
reservoir tank.
ABS system is bled using conventional method. With engine
running, manually bleed system using an assistant. For bleeding order,
see BRAKE LINE BLEEDING SEQUENCE table. Ensure Load Sensing
Proportioning Valve (LSPV) is bled in sequence. Remove all air from
brake system. Refill brake fluid reservoir after bleeding procedure is
complete.
BRAKE LINE BLEEDING SEQUENCE









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Application Sequence
Montero ....................................... RR, LR, LSPV, RF, LF









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for one second, and then go out. Turn ignition switch to START
position. Warning light should come on and stay on.
2) When ignition switch is turned from START to ON position,
warning light should come on for one second, and then go out. If
warning light functions as specified, go to step 3). If warning light
does not function as specified, see appropriate trouble shooting test:
* IGNITION SWITCH IN ON POSITION (ENGINE NOT RUNNING),
ANTI-LOCK WARNING LIGHT INOPERATIVE
* AFTER ENGINE STARTS, ANTI-LOCK WARNING LIGHT REMAINS ON
* IGNITION SWITCH IN START POSITION, ANTI-LOCK WARNING LIGHT
INOPERATIVE
* IGNITION SWITCH IN ON POSITION, ANTI-LOCK WARNING LIGHT
BLINKS TWICE. IN START POSITION, LIGHT STAYS ON. WHEN
IGNITION SWITCH IS CYCLED FROM START TO ON POSITION, LIGHT
BLINKS ONCE, THEN TURNS OFF
3) Test drive vehicle. If ANTI-LOCK warning light does not
come on at low speed, go to next step. If light comes on at low speed,
motor relay, solenoid valve or Wheel Speed Sensor (WSS) malfunction is\
indicated. Go to step 6). If insufficient braking force or ABS
malfunction exists, go to next step. If none of listed symptoms exist,
go to step 6).
4) Check conventional brake system components for proper
operation. Check for mechanical lock of hydraulic unit solenoid valve.
Check for plugged hydraulic line in hydraulic unit. Repair or replace
as necessary. If hydraulic unit is okay, go to next step.
5) Ensure WSS rotor gap is correct. See WHEEL SPEED SENSOR
(WSS) under ADJUSTMENTS. Check for faulty wheel speed sensor. See
WHEEL SPEED SENSOR (WSS) under COMPONENT TESTS. Replace sensor as
necessary. See WHEEL SPEED SENSOR (WSS) under REMOVAL & INSTALLATION.
Inspect ECU connectors and related wiring harness. See WIRING DIAGRAMS
. If testing indicates no mechanical or electrical failures,
substitute ECU with known-good unit and retest.
6) Enter ABS self-diagnostics and retrieve Diagnostic Trouble
Codes (DTCs). See RETRIEVING DTCs under SELF-DIAGNOSTIC SYSTEM. If no
DTCs are displayed, fault may be intermittent. Attempt to make
malfunction reoccur. If no diagnostic output exists, check and repair
wiring harness between ECU and data link connector. See
WIRING DIAGRAMS .
NOTE: Trouble shoot ANTI-LOCK warning light in following sequence:
instrument cluster circuit, ECU and valve relay.
Ignition Switch In ON position (Engine Not Running),
ANTI-LOCK Warning Light Inoperative
1) If all other warning lights come on with ignition on, go
to step 3). If other warning lights do not come on, check fuse No. 11
in main fuse panel. If fuse is blown, correct cause of blown fuse, and
replace fuse. If fuse is okay, go to next step.
2) Remove instrument cluster. Turn ignition on. Using DVOM,
check voltage between vehicle ground and instrument cluster ANTI-LOCK
warning light terminal No. 28. See Fig. 2. If light does not come on,
go to next step. If light comes on, check and repair connectors and
related wiring harness between instrument cluster, ABS valve relay and
ECU. See WIRING DIAGRAMS .
3) Turn ignition off. Check for faulty warning light bulb.
Replace bulb as necessary. If bulb is okay, check and repair
connectors and related wiring harness between instrument cluster and
ECU. See WIRING DIAGRAMS . If connectors and wiring are okay, replace
instrument cluster.