1998 MITSUBISHI MONTERO oxygen

tow fuel tank removal child lock oil level weight dead battery open trunk

Page 28 of 1501

$MITSUBISHI MONTERO 1998 Service Manual \ \b\ \ \ \ \ \ EAC Electric Assist Choke$

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EAC Electric Assist Choke

EACV Electric Air Control Valve

EBCM Electronic Brake Control Module

ECA Electronic Control Assembly

ECAT Electronically Controlled Automatic Transaxle

ECM Electronic Control Module

ECT Engine Coolant Temperature Sensor

ECU Electronic Control Unit or Engine Control Unit

EDF Electric Drive Fan relay assembly

EDIS Electronic Distributorless Ignition System

EEC Electronic Engine Control

EECS Evaporative Emission Control System

EEPROM Electronically Erasable PROM

EFE Early Fuel Evaporation

EFI Electronic Fuel Injection

EGO Exhaust Gas Oxygen sensor (see HEGO)

EGR Exhaust Gas Recirculation system

EGRC EGR Control solenoid or system

EGRV EGR Vent solenoid or system

EMR Emission Maintenance Reminder Module

ESA Electronic Spark Advance

ESC Electronic Spark Control

EST Electronic Spark Timing

ETR Emergency Tensioning Retractor

EVAP Fuel Evaporative System

EVIC Electronic Vehicle Information Center

EVO Electronic Variable Orifice

EVP EGR Valve Position Sensor

EVR EGR Valve Regulator

EVRV Electronic Vacuum Regulator Valve

Elect. Electronic

Eng. Engine

Evap. Evaporative

Exc. Except

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"F" ABBREVIATION TABLE
"F" ABBREVIATION TABLE\
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ABBREVIATION DEFINITION

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F Fahrenheit (Degrees)

F/B Fuse Block

FBC Feedback Carburetor

FI Fuel Injector or Fuel Injection

FICD Fast Idle Control Device

FIPL Fuel Injector Pump Lever

FP Fuel Pump

FPM Fuel Pump Monitor

FPR-VSV Fuel Pressure Regulator Vacuum Switching Valve

FWD Front Wheel Drive

Fed. Federal

Ft. Lbs. Foot Pounds

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"G" ABBREVIATION TABLE
"G" ABBREVIATION TABLE\
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ABBREVIATION DEFINITION

Page 29 of 1501

$MITSUBISHI MONTERO 1998 Service Manual \ \b\ \ \ \ \ \ g grams$

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g grams

GND or GRND Ground

GRN Green

GRY Gray

Ga. Gauge

Gals. gallons

Gov. Governor

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"H" ABBREVIATION TABLE
"H" ABBREVIATION TABLE\
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ABBREVIATION DEFINITION

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H/D Heavy Duty

HAC High Altitude Compensation

HC Hydrocarbons

HEDF High Speed Electro Drive Fan relay or circuit

HEGO Heated Exhaust Gas Oxygen Sensor

HEGOG HEGO Ground circuit

HEI High Energy Ignition

HLDT Headlight

HO High Output

HP High Performance

HSC High Swirl Combustion

HSO High Specific Output

HTR Heater

HVAC Heating

Headlt. Headlight

Hg Mercury

Hgt. Height

Htr. Heater

Hz Hertz (Cycles Per Second)

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"I" ABBREVIATION TABLE
"I" ABBREVIATION TABLE\
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ABBREVIATION DEFINITION

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I.D. Inside Diameter

IAC Idle Air Control

IACV Idle Air Control Valve

IC Integrated Circuit

ID Identification

IDM Ignition Diagnostic Monitor

IGN Ignition system or circuit

ILC Idle Load Compensator

In. Hg Inches of Mercury

INCH Lbs. Inch Pounds

INFL REST Inflatable Restraint

INJ Injector or Injection

IP Instrument Panel

IPC Instrument Panel Cluster

ISA Idle Speed Actuator

ISC Idle Speed Control

ISS Idle Stop Solenoid

ITS Idle Tracking Switch

IVSV Idle Vacuum Switching Valve

Page 31 of 1501

MITSUBISHI MONTERO 1998 Service Manual mm Millimeters

M/T Manual Transaxle or Transmission

MA PFI Mass Air Sequential Port Fuel Injecti

mm Millimeters

M/T Manual Transaxle or Transmission

MA PFI Mass Air Sequential Port Fuel Injection system

MA or MAF Mass Airflow

MAF Mass Air Flow sensor

MAFS Mass Airflow Sensor

MAP Manifold Absolute Pressure sensor

MAT Manifold Air Temperature

MCU Microprocessor Control Unit

MCV Mixture Control Valve

MEM-CAL Memory Calibration Chip

MFI Multiport Fuel Injection

MIL Malfunction Indicator Light

MLP Manual Lever Position

MPFI Multi Point Fuel Injection

MPH Miles Per Hour

MPI Multi-Point (Fuel) Injection

Man. Manual

Mech. Mechanical

Mem. Memory

Mtr. Motor

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"N" ABBREVIATION TABLE
"N" ABBREVIATION TABLE\
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ABBREVIATION DEFINITION

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N.m Newton-Meter

NA Not Available

NDS Neutral Drive Switch

NGS Neutral Gear Switch

NOx Oxides of Nitrogen

NPS Neutral Pressure Switch

No. Number

Nos. Numbers

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"O" ABBREVIATION TABLE
"O" ABBREVIATION TABLE\
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ABBREVIATION DEFINITION

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O Oxygen

O.D. Outside Diameter

O/S Oversize

O2 Oxygen

OC Oxidation Catalyst

OCC Output Circuit Check

OD Overdrive

ODO Odometer

OHC Overhead Camshaft

ORG Orange

OSC Output State Check

Opt. Option or Optional

oz. Ounce

ozs. Ounces

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Page 33 of 1501

MITSUBISHI MONTERO 1998 Service Manual RVB Rear Vacuum Break

RWAL Rear Wheel Anti-Lock Brake

RWD Rear Wheel Drive

RVB Rear Vacuum Break

RWAL Rear Wheel Anti-Lock Brake

RWD Rear Wheel Drive

Recirc. Recirculate or Recirculation

Reg. Regulator

Rly. Relay

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"S" ABBREVIATION TABLE
"S" ABBREVIATION TABLE\
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ABBREVIATION DEFINITION

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SAW Spark Angle Word

SBC Single Bed Converter

SBEC Single Board Engine Controller

SC Super Charged

SCC Spark Control Computer

SCS Air Suction Control Solenoid

SDM Supplemental Restraint System Diagnostic Module

SDU SRS Diagnostic Unit

SEN Sensor

SES Service Engine Soon

SFI Sequential (Port) Fuel Injection

SIG RTN Signal Return circuit

SIL Shift Indicator Light

SIR Supplemental Inflatable Restraint

SMEC Single Module Engine Controller

SOHC Single Overhead Cam

SOL or Sol. Solenoid

SPFI Sequential Port Fuel Injection

SPK Spark Control

SPOUT Spark Output Signal

SRS Supplemental Restraint System (Air Bag)

SS 3/4-4/3 Shift Solenoid circuit

SSI Solid State Ignition

STAR Self-Test Automatic Readout

STI Self Test Input circuit

STO Self-Test Output

SUB-O2 Sub Oxygen Sensor

Sen. or Sens. Sensor

Sol. Solenoid

Sprchg. Supercharger

Strg. Steering

Susp. Suspension

Sw. Switch

Sys. System

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"T" ABBREVIATION TABLE
"T" ABBREVIATION TABLE\
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ABBREVIATION DEFINITION

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T.V. Throttle Valve

TAB Thermactor Air By-Pass

TAC Thermostatic Air Cleaner

TAD Thermactor Air Diverter

TAN Tan

TBI Throttle Body Injection

Page 101 of 1501

MITSUBISHI MONTERO 1998 Service Manual A/C SYSTEM GENERAL SERVICING
1998 Mitsubishi Montero
1998 AIR CONDITIONING & HEAT
Mitsubishi - A/C System General Servicing
Diamante, Eclipse, Galant, Mirage, Montero, Mo

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

Page 183 of 1501

MITSUBISHI MONTERO 1998 Service Manual FR ............................................ Fill Pipe Restrictor
HO2S .......................................... Heated Oxygen Sensor
MIL .................................... Malfunction Ind

Page 456 of 1501

$MITSUBISHI MONTERO 1998 Service Manual Mirage & Montero Sport ... Behind Right Side Of Instrument Panel (Glove Box)\ Montero ..................................... Right Front Kick Panel All Others ...................................$

Mirage &
Montero Sport ... Behind Right Side Of Instrument Panel (Glove Box)\
Montero ..................................... Right Front Kick Panel
All Others ................................... Behind Center Console
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NOTE: Components are grouped into 2 categories. The first category
covers INPUT DEVICES, which control or produce voltage
signals monitored by Powertrain Control Module (PCM). The
second category covers OUTPUT SIGNALS, which are components
controlled by PCM.
INPUT DEVICES
Vehicles are equipped with different combinations of input
devices. Not all input devices are used on all models. To determine
input device usage on specific models, see appropriate wiring diagram
in L - WIRING DIAGRAMS article. The following are available input
devices.
Air Conditioning Switch
When A/C is turned on, signal is sent to PCM. With engine at
idle, PCM increases idle speed through Idle Air Control (IAC) motor.
Airflow Sensor Assembly
Assembly is mounted inside air cleaner, and incorporates
barometric pressure sensor, intake air temperature sensor and volume
airflow sensor.
Barometric (BARO) Pressure Sensor
Sensor is incorporated into airflow sensor assembly. Sensor
converts barometric pressure to electrical signal, which is sent to
PCM. PCM adjusts air/fuel ratio and ignition timing according to
altitude.
Camshaft Position (CMP) Sensor
On SOHC engines equipped with a distributor, CMP sensor is
located in distributor. On Eclipse (Turbo) and DOHC V6 engines, sensor\
is located beside camshaft, in front of engine. On all other engines,
CMP sensor is a separate unit mounted in place of distributor. PCM
determines TDC based on pulse signals received from sensor, and then
controls MFI timing.
Closed Throttle Position (CTP) Switch
CTP switch is located in the Throttle Position (TP) sensor.
PCM senses whether accelerator pedal is depressed or not. High voltage
(open) or low voltage (closed) signal is input to PCM, which then
controls Idle Air Control (IAC) motor based on input signal.
Crankshaft Position (CKP) Sensor
CKP sensor is located in distributor on SOHC engines, except
1.5L 4-cylinder with California emissions. On DOHC 4-cylinder, DOHC V6
and 1.5L 4-cylinder engines with California emissions, CKP sensor is
located beside crankshaft, in front of engine. PCM determines
crankshaft position on pulse signals received from sensor, and then
controls MFI timing and ignition timing.
Engine Coolant Temperature (ECT) Sensor
ECT sensor converts coolant temperature to electrical signal
for use by PCM. PCM uses coolant temperature information to control
fuel enrichment when engine is cold.
Heated Oxygen Sensor (HO2S)

Page 457 of 1501

MITSUBISHI MONTERO 1998 Service Manual HO2S detects oxygen content in exhaust gas and sends this
information to PCM. PCM uses input signals from HO2S to vary duration
of fuel injection. HO2S heater stabilizes sensor temperature
re

HO2S detects oxygen content in exhaust gas and sends this
information to PCM. PCM uses input signals from HO2S to vary duration
of fuel injection. HO2S heater stabilizes sensor temperature
regardless of exhaust gas temperature to allow for more accurate
exhaust oxygen content readings.
Idle Air Control (IAC) Valve Position Sensor
Sensor is incorporated in IAC motor. Sensor senses IAC motor
plunger position and sends electrical signal to PCM.
Ignition Timing Adjustment Terminal
Used for adjusting base ignition timing. When terminal is
grounded, PCM timing control function is by-passed, allowing base
timing to be adjusted.
Intake Air Temperature (IAT) Sensor
IAT sensor is incorporated into airflow sensor assembly. This
resistor-based sensor measures temperature of incoming air and
supplies air density information to PCM.
Knock Sensor (KS)
KS is located in cylinder block and senses engine vibration
during detonation (knock). KS converts vibration into electrical
signal. PCM retards ignition timing based on this signal.
Manifold Differential Pressure (MDP) Sensor
MDP sensor converts negative air pressure in intake manifold
plenum into voltage signals sent to PCM. PCM monitors Exhaust Gas
Recirculation (EGR) system using these signals.
Park/Neutral Position (PNP) Switch (Automatic Transmission)
PNP switch senses position of transmission select lever,
indicating engine load due to automatic transmission engagement. Based
on this signal, PCM commands IAC motor to increase throttle angle,
maintaining optimum idle speed.
Power Steering Oil Pressure Switch
Switch detects increase in power steering oil pressure. When
power steering oil pressure increases, switch contacts close,
signaling PCM. PCM commands IAC motor, raising idle speed to
compensate for drop in engine RPM due to power steering load.
Throttle Position (TP) Sensor
TP sensor is a variable resistor mounted on throttle body.
PCM uses voltage signal from TP sensor to determine throttle plate
angle.
Vehicle Speed Sensor (VSS)
Mounted on transaxle/transmission, VSS sends a pulsing signal
to PCM for vehicle speed calculation. PCM uses this calculation for
cruise control and fuel cut-off.
Volume Airflow (VAF) Sensor
Incorporated into airflow sensor assembly, VAF sensor
measures intake airflow rate. Intake air flows through tunnel in
airflow sensor assembly. VAF sensor sends frequency signal to PCM. PCM
uses signal to adjust fuel injection rate.
OUTPUT SIGNALS
NOTE: Vehicles are equipped with various combinations of
computer-controlled components. Not all components listed
below are used on every vehicle. To determine component

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