ad blue MITSUBISHI MONTERO 1998 Service Manual









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ABBREVIATION DEFINITION 










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B/P Backpressure 

BAC By-Pass Air Control 

BAP Barometric Absolute Pressure Sensor 

BARO Barometric 

BBDC Before Bottom Dead Center 

BCM Body Control Module 

BDC Bottom Dead Center 

BHP Brake Horsepower 

BLK Black 

BLU Blue 

BMAP Barometric & Manifold Absolute Pressure Sensor 

BOO Brake On-Off Switch 

BP Barometric Pressure sensor 

BPS Barometric Pressure Sensor 

BPT Backpressure Transducer 

BRN Brown 

BTDC Before Top Dead Center 

BTU British Thermal Unit 

BVSV Bimetallic Vacuum Switching Valve 

Baro. Barometric 

Batt. Battery 

Bbl. Barrel (Example: 4-Bbl.) 

Blst. Ballast 

Blwr. Blower 

Brkr. Breaker 











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"C" ABBREVIATION TABLE
"C" ABBREVIATION TABLE







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ABBREVIATION DEFINITION 










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C Celsius (Degrees) 

C(3) I Computer Controlled Coil Ignition 

C(4) Computer Controlled Catalytic Converter 

CANP Canister Purge solenoid 

CARB California Air Resources Board 

CAT Catalytic Converter 

CB Circuit Breaker 

CBD Closed Bowl Distributor 

CBVV Carburetor Bowl Vent Valve 

cc Cubic Centimeter 

CCC Computer Command Control 

CCD Computer Controlled Dwell 

CCM Central Control Module 

CCO Converter Clutch Override 

CCOT Cycling Clutch Orifice Tube 

CCW Counterclockwise 

CDI Capacitor Discharge Ignition 

CEC Computerized Engine Control 

CFI Central Fuel Injection 

CID Cubic Inch Displacement 

CID Cylinder Identification sensor 

CIS Continuous Injection System 

CIS-E Continuous Injection System-Electronic 

CKT Circuit 

CLR Clear 

CNG Compressed Natural Gas 

CO Carbon Monoxide 

CO2 Carbon Dioxide 

CONV Convertible 

CP Canister Purge 

CPA Connector Position Assurance 

CPS Crank Position Sensor 

CTS Coolant Temperature Sensor 

CV Check Valve or Constant Velocity 

CVC Constant Vacuum Control 

CW Clockwise 

CYL or Cyl. Cylinder 

Calif. California 

Carb. Carburetor 

Chrg. Charging 

Circ. Circuit 

Cntrl. Control 

Comp. Compressor or Compartment 

Conn. Connector 

Cont. Continued 

Conv. Convertible or Converter 

Cu. In. Cubic Inch 

Cyl. Cylinder 











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"D" ABBREVIATION TABLE
"D" ABBREVIATION TABLE







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ABBREVIATION DEFINITION 










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"D" Drive 

DBC Dual Bed Catalyst 

DC Direct Current or Discharge 

DDD Dual Diaphragm Distributor 

DERM Diagnostic Energy Reserve Module 

DFI Digital Fuel Injection 

DIC Driver Information Center 

DIS Direct Ignition System 

DIS Distributorless Ignition System 

DIST Distribution 

DISTR Distributor 

DK BLU Dark Blue 

DK GRN Dark Green 

DME Digital Motor Electronics (Motronic System) 

DOHC Double Overhead Cam 

DOT Department of Transportation 

DP Dashpot 

DRB-II Diagnostic Readout Box 

DVOM Digital Volt/Ohm Meter (see VOM) 

Def. Defogger or Defroster 

Def. Defrost 

Defog. Defogger 

Diag. Diagnostic 

Dist. Distributor or Distribution 

Dr. Door 











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"E" ABBREVIATION TABLE
"E" ABBREVIATION TABLE







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ABBREVIATION DEFINITION 

Ign. Ignition 

In. Inches 

Inj. Injector 











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"J" ABBREVIATION TABLE
"J" ABBREVIATION TABLE







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ABBREVIATION DEFINITION 










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J/B Junction Block 











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"K" ABBREVIATION TABLE
"K" ABBREVIATION TABLE







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ABBREVIATION DEFINITION 










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k/ohms 1000 ohms (kilo as in k/ohms) 

kg Kilograms (weight) 

kg/cm Kilograms Per Square Centimeter 

KAM Keep Alive Memory 

KAPWR Keep Alive Power 

KM/H Kilometers Per Hour 

KOEO Key On Engine Off 

KOER Key On Engine Running 

KS Knock Sensor 











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"L" ABBREVIATION TABLE
"L" ABBREVIATION TABLE







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ABBREVIATION DEFINITION 










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L Liter(s) 

L/D Light Duty 

LCD Liquid Crystal Display 

LED Light Emitting Diode 

LH Left Hand 

LOS Limited Operation Strategy 

LT BLU Light Blue 

LT GRN Light Green 

LUS Lock-Up Solenoid 

Lbs. Pounds 

Lt(s). Light(s) 

Lugg. Luggage 











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"M" ABBREVIATION TABLE
"M" ABBREVIATION TABLE







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ABBREVIATION DEFINITION 










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mA Milliamps 

mV Millivolts 

mfd. Microfarads 

settings.
2) Set blower/fan on high speed. Close doors and windows.
Insert thermometer in center vent. Operate system for 20 minutes to
allow system to stabilize. Measure temperature.
3) Discharge air temperature must be 37-44
F (3-7C) at
center vent, with high side and low side pressures within
specification. See A/C SYSTEM SPECIFICATIONS table at beginning of
article.
A/C CONTROL UNIT (ACCU)
1) Locate A/C Control Unit (ACCU) on top of evaporator case
and disconnect 10-pin connector. Inspect connector and wiring for
damage. Turn ignition and A/C on. Set temperature control to maximum
cooling and blower switch to high. Using a DVOM set to appropriate
test function, inspect harness side of connector. See Fig. 3. Go to
next step. If all test readings are as specified, replace ACCU.
2) Terminal No. 1 (Green/Yellow wire) is ACCU output. With
A/C and blower motor on, battery voltage should be present when ACCU
has received signals from pressure and temperature sensors confirming
A/C operation is okay.
3) Terminal No. 3 (Green/Blue wire) is ACCU power supply whe\
n
A/C switch is in A/C mode. With ignition and blower on, and A/C switch
at second level setting, battery voltage should be present.
4) Terminal No. 5 (Green/Red wire) is ACCU power supply when\
A/C switch is in ECONO mode. With ignition and blower on, and A/C
switch at first level setting, battery voltage should be present.
Terminals No. 2 and 7 (Black wire) are ACCU grounds. There should be
zero volts at all times.
5) Turn ignition off. Reconnect 10-pin connector. Turn
ignition on. Turn A/C on. Set temperature control to maximum cooling
and blower switch to high. Backprobe 10-pin connector. Go to next
step. If all test readings are as specified, replace ACCU.
6) Terminal No. 10 (Blue/White wire) is air thermosensor
power supply. With ignition, blower and A/C on, approximately 5.5
volts should be present.
7) Terminal No. 8 (Blue/Yellow wire) is air thermosensor
signal. When temperature of evaporator outlet portion is 77
F (25C),
there should be approximately 3.6 volts present.
8) Terminal No. 4 (White/Blue wire) is air inlet sensor powe\
r
supply. With ignition, blower and A/C on, approximately 5.5 volts
should be present.
9) Terminal No. 9 (Yellow/Green wire) is air inlet sensor
signal. When temperature of evaporator outlet portion is 77
F (25C),
there should be approximately 1.5 volts present.
Fig. 1: Testing ACCU
Courtesy of Mitsubishi Motor Sales of America.
A/C SWITCH

Transportation (DOT) approved, DOT 4BW or DOT 4BA refrigerant
containers.
7) Never overfill refrigerant containers. The safe filling
level of a refrigerant container MUST NOT exceed 60 percent of the
container's gross weight rating. Store refrigerant containers at
temperature less than 125
F (52C).
8) R-134a refrigerant is sold and stored in 30- or 50-pound
Light Blue containers, while Freon (R-12) is stored in White colored
containers.
9) Refrigerant R-12 and R-134a must never be mixed, as they
and their desiccants and lubricants are not compatible. If
refrigerants are mixed, system cross-contamination or A/C system
component failure may occur. Always use separate servicing and
refrigerant recovery/recycling equipment.
10) Follow equipment manufacturer instructions of all service
equipment to be used. The Material Safety Data Sheet (MSDS), provided
by refrigerant manufacturer/suppliers, contains valuable information
regarding the safe handling of refrigerants.
11) Before connecting refrigerant lines always lubricate "O"
rings using appropriate refrigerant oil.
12) Always plug or cap A/C system refrigerant lines and
component connections as soon as possible to protect components from
moisture and/or dust. DO NOT remove plugs or caps until ready to
install component.
13) Always use a back-up wrench when tightening or loosening
fittings.
IDENTIFYING R-134a SYSTEMS & COMPONENTS
To prevent refrigerant cross-contamination, use following
methods to identify R-134a based systems and components.
Fittings & "O" Rings
All R-134a based A/C systems use 1/2" - 16ACME threaded
fittings (identifiable by square threads) and quick-connect service
couplings. See Fig. 1. Besides the use of these fittings, most
manufacturers will use Green colored "O" rings in R-134a systems.
Fig. 1: Identifying R-134a Fittings & Quick-Connect Service Couplings
Courtesy of Audi of America, Inc.
Underhood A/C Specification Labels
Most R-134a based systems will be identified through the use

Other Means Of Identification
Refrigerant R-134a, when viewed through a sight glass, may
have a "milky" appearance due to the mixture of refrigerant and
lubricating oil. As the refrigerant and oil DO NOT exhibit a "clear"
sight glass on a properly charged A/C system, most R-134a systems have
no sight glass.
REFRIGERANT OILS
NOTE: Use ONLY the specified oil for the appropriate system or A/C
compressor. Always check vehicle underhood A/C specification
label or A/C compressor label before adding refrigerant oil
to A/C compressor/system. See Figs. 2 and 3. Always use
refrigerant oil specified on vehicle underhood A/C
specification label if different from the following list.
Refrigerant R-12 based systems use mineral oil, while R-134a
systems use Polyalkylene Glycol (PAG) oils. Using a mineral oil based
lubricant with R-134a will result in A/C compressor failure due to
lack of proper lubrication. The following R-134a refrigerant oils are
currently specified:
Use DENSO/ND-Oil 8 refrigerant oil on Nippondenso
compressors. Use SUN PAG 56 refrigerant oil on Sanden compressors.
NOTE: PAG oils absorb moisture very rapidly, 2.3-5.6 percent by
weight, as compared to a mineral oil absorption rate of
0.005 percent by weight.
SERVICE EQUIPMENT
A/C systems using R-134a refrigerant and PAG lubricants
cannot use R-12 refrigerant or mineral oil lubricants. R-134a
refrigerant is NOT compatible or interchangeable with R-12
refrigerant. Separate sets of hoses, manifold gauge sets and
recovery/recycling equipment are required to service the different
systems. This is necessary to avoid cross-contaminating and damaging
A/C system. A single set of A/C service equipment cannot be cleaned
thoroughly enough to be used with both types of refrigerant.
All equipment used to service A/C systems using R-134a must
be U.L. listed and certified to meet SAE standard J2210. The service
hoses on the manifold gauge set must have manual (turn wheel) or
automatic back-flow valves at the service port connector ends. This
will prevent refrigerant from being released into the atmosphere.
For identification purposes, R-134a service hoses must have a
Black stripe along its length and be clearly labeled SAE J2196/R-134a.
The low pressure test hose is Blue with a Black stripe. The high
pressure test hose is Red with a Black stripe, and the center test
hose is Yellow with a Black stripe.
R-134a manifold gauge sets can be identified by one or all of
the following: Labeled FOR USE WITH R-134a on set, labeled HFC-134a or
R-134a on gauge face, or by a Light Blue color on gauge face. In
addition, pressure/temperature scales on R-134a gauge sets are
different from R-12 manifold gauge sets.
SYSTEM SERVICE VALVES
SCHRADER-TYPE VALVES
NOTE: Although similar in construction and operation to a tire
valve, NEVER replace a Schrader-type valve with a tire valve.

than 0.5 volt or more than 4.5 volts, or an open or short
circuit in "G" sensor system.
1) Disconnect "G" sensor connector. Sensor is located on
bracket under center console, next to shifter. See Fig. 10. Connect
Special Tool (MB991348) between sensor and connector. Using a DVOM,
check voltage between sensor connector terminals No. 2 (Blue/White
wire) and No. 3 (Black/Red wire). Voltage should be 2.38-2.62 volts.
If voltage is as specified, reconnect sensor connector and go to step
3). If voltage is not as specified, leave special tool and DVOM
connected and go to next step.
2) Note top center position of sensor, and remove sensor. See
"G" SENSOR under REMOVAL & INSTALLATION . Secure sensor so that arrow
on sensor is facing straight down. Voltage should be 3.4-3.6 volts. If
voltage is specified, reinstall sensor and go to next step. If voltage
is not as specified, replace sensor.
3) Turn ignition off. Disconnect ECU 26-pin connector. Turn
ignition on. Check voltage between ECU 26-pin connector terminals No.
4 and 17. See Figs. 5-6. Voltage should be 2.4-2.6 volts. If voltage
is as specified, go to next step. If voltage is not as specified,
check and repair connectors and related wiring harness between ECU and
sensor. See WIRING DIAGRAMS .
4) Check and repair ECU 26-pin connector. If connector is
okay, replace ECU.
Fig. 10: Locating "G" Sensor
Courtesy of Mitsubishi Motor Sales of America.
DTC 33: STOPLIGHT SWITCH SYSTEM

cavity and contact surfaces. Install oil seal using seal driver. Press
new oil seal into bearing case until it is flush with face of bearing
case. Install backing plate and bearing case.
2) Apply grease to external surfaces of bearing outer race.
Press bearing outer race into bearing case. Install rear brake
assembly and bearing case. Pack bearing case and axle threads with
grease. Install new retainer ring and snap ring.
3) Using a feeler gauge, measure clearance between snap ring
and new retainer ring. Clearance should be less than 0.0065" (0.165
mm). If clearance exceeds specification, install a new selective snap
ring to bring clearance to specification. See SNAP RING THICKNESS
SPECIFICATION table.
SNAP RING THICKNESS SPECIFICATION









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Thickness: In. (mm) Color\
0.060 (1.52) ................................................... Red\
0.067 (1.70) ................................................ Purple\
0.073 (1.85) .................................................. Blue\
0.079 (2.01) ................................................ Yellow\
0.085 (2.16) ............................................... Neutral\









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4) Check condition of oil seal and replace as necessary.
Install axle shaft assembly into axle housing. Tighten bearing
retainer bolts to 65 ft. lbs (15 N.m.). To complete installation,
reverse removal procedure.
REAR AXLE HUB BEARINGS
NOTE: Rear hub bearings are not serviceable on FWD models.
Removal & Installation (FWD Models)
1) Raise and support vehicle. Remove wheels. Remove wheel
speed sensor (if equipped). On models with drum brakes, remove brake
drum and shoes. See REAR BRAKE DRUM & SHOES .
2) On models with disc brakes, remove caliper and rotor. On
all models, remove hub bolts or spindle nut and hub assembly. To
install, reverse removal procedure. Tighten hub bolts or spindle nut
to specification. See HUB TIGHTENING TORQUE table. Rotate brake drum
or disc to ensure free movement.
NOTE: Rear hub bearings are not serviceable on Eclipse AWD models.
Removal & Installation (Eclipse AWD)
1) Raise and support vehicle. Remove wheels. Remove wheel
speed sensor (if equipped). On models with drum brakes, remove brake
drum and shoes. See REAR BRAKE DRUM & SHOES .
2) On models with disc brakes, remove caliper and rotor. On
all models, remove axle nut. Remove 4 hub bolts and hub assembly. To
install, reverse removal procedure. Tighten hub bolts to
specification. See HUB TIGHTENING TORQUE table. Rotate brake drum or
disc to ensure free movement.
HUB TIGHTENING TORQUE









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Application Ft. Lbs. (N.m)\
Hub Mounting Bolts ................................... 54-65 (74-85)\
Spindle Nut
Mirage ................................................. 127 (172)\
3000GT FWD ............................................. 170 (230)\

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)