1998 MITSUBISHI MONTERO transmission
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![MITSUBISHI MONTERO 1998 Service Manual ABBREVIATIONS
1998 Mitsubishi Montero
GENERAL INFORMATION
COMMONLY USED ABBREVIATION
"A" ABBREVIATION TABLE
"A" ABBREVIATION TABLE \
\](/manual-img/19/57333/w960_57333-24.png "MITSUBISHI MONTERO 1998 Service Manual ABBREVIATIONS
1998 Mitsubishi Montero
GENERAL INFORMATION
COMMONLY USED ABBREVIATION
\"A\" ABBREVIATION TABLE
\"A\" ABBREVIATION TABLE \
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ABBREVIATIONS
1998 Mitsubishi Montero
GENERAL INFORMATION
COMMONLY USED ABBREVIATION
"A" ABBREVIATION TABLE
"A" ABBREVIATION TABLE \
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ABBREVIATION DEFINITION
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A Amperes
A/C Air Conditioning
A/T Automatic Transmission/Transaxle
AAP Auxiliary Accelerator Pump
AB Air Bleed
ABCV Air Bleed Control Valve
ABDC After Bottom Dead Center
ABRS Air Bag Restraint System
ABS Anti-Lock Brake System
AC Alternating Current
ACC A/C Clutch Compressor
ACCS A/C Cycling Switch
ACCUM Accumulator
ACCY Accessory
ACT Air Charge Temperature Sensor
ACV Thermactor Air Control Valve
ADJ Adjust or Adjustable
ADV Advance
AFS Airflow Sensor
AI Air Injection
AIR or A.I.R. Air Injection Reactor
AIS Air Injection System
ALCL Assembly Line Communications Link
ALDL Assembly Line Diagnostic Link
ARC Automatic Ride Control
ASCD Automatic Speed Control Device
ASCS Air Suction Control Solenoid
ASD Auto Shutdown
ASDM Air Bag System Diagnostic Module
ASV Air Suction Valve
ATC Automatic Temperature Control
ATDC After Top Dead Center
ATF Automatic Transmission Fluid
ATS Air Temperature Sensor
AXOD Automatic Transaxle Overdrive
Abs. Absolute
Accy. Accessory
Alt. Alternator or Altitude
Amp. Ampere
Assy. Assembly
Auto. Automatic
Aux. Auxiliary
Avg. Average
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"B" ABBREVIATION TABLE
"B" ABBREVIATION TABLE
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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
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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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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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TCC Torque Converter Clutch
TCCS Toyota Computer Control System
TDC Top Dead Center
TDCL Total Diagnostic Communication Link
TFI Thick Film Ignition system
TGS Top Gear Switch (cancels SIL in top gear)
THERMAC Thermostatic Air Cleaner
THS Transmission Hydraulic Switch
TP/TPS Throttle Position Sensor
TPI Tuned Port Injection
TPS Throttle Position Sensor/Switch
TS Temperature Sensor
TSB Technical Service Bulletin
TTS Transmission Temperature Switch
TV Thermovalve
TWC Three-Way Catalyst
Temp. Temperature
Trans. Transaxle/Transmission
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"V" ABBREVIATION TABLE
"V" ABBREVIATION TABLE \
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V Valve
VAF Vane Air Flow sensor or circuit
VAPS Variable Assist Power Steering
VAT Vane Air Temperature
VATS Vehicle Anti-Theft System
VBATT Vehicle Battery Voltage
VCC Viscous Converter Clutch
VIN Vehicle Identification Number
VIO Violet
VLR Volt Loop Reserve
VM Vacuum Modulator
VM Vane Meter
VOM Volt-Ohmmeter (Analog)
VPWR Vehicle Power supply voltage (10-14 volts)
VREF Voltage Reference (ECA supplied reference voltage
VRV Vacuum Regulator Valve
VSC Vehicle Speed Control sensor or signal
VSS Vehicle Speed Sensor or signal
VSV Vacuum Switching Valve
Vac. Vacuum
Volt. Voltage
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"W" ABBREVIATION TABLE
"W" ABBREVIATION TABLE \
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W/ With
W/O Without
WAC WOT A/C Cut-off switch or circuit
WAC Wide Open Throttle A/C Switch
WHT White
WOT Wide Open Throttle
YEL Yellow
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are continually republished. In addition to these, standards for Drive
Train and Transmissions have recently been promulgated. Participating
shops utilize these Uniform Inspection & Communication Standards as
part of the inspection process and for communicating their findings to
their customers.
The Motorist Assurance Program continues to work
cooperatively and proactively with government agencies and consumer
groups toward solutions that both benefit the customer and are
mutually acceptable to both regulators and industry. We maintain the
belief that industry must retain control over how we conduct our
business, and we must be viewed as part of the solution and not part
of the problem. Meetings with state and other government officials
(and their representatives), concerned with auto repair and/or
consumer protection, are conducted. Feedback from these sessions is
brought back to the association, and the program adjusted as needed.
To assure auto repair customers recourse if they were not
satisfied with a repair transaction, the Motorist Assurance Program
offers mediation and arbitration through MAP/BBB-CARE and other non-
profit organizations. MAP conducted pilot programs in twelve states
before announcing the program nationally in October, 1998. During the
pilots, participating repair shops demonstrated their adherence to the
Pledge and Standards and agreed to follow the UICS in communicating
the results of their inspection to their customers. To put some
"teeth" in the program, an accreditation requirement for shops was
initiated. The requirements are stringent, and a self-policing method
has been incorporated which includes the "mystery shopping" of
outlets.
We welcome you to join us as we continue our outreach... with
your support, both the automotive repair industry and your customers
will reap the benefits. Please visit MAP at our Internet site www.
motorist.org or contact us at:
1444 I Street, NW Suite 700
Washington, DC 20005
Phone (202) 712-9042 Fax (202) 216-9646
January 1999
MAP UNIFORM INSPECTION GENERAL GUIDELINES
OVERVIEW OF SERVICE REQUIREMENTS & SUGGESTIONS
It is MAP policy that all exhaust, brake, steering,
suspension, wheel alignment, drive-line, engine performance and
maintenance, and heating, ventilation and air conditioning, and
electrical services be offered and performed under the standards and
procedures specified in these sections.
Before any service is performed on a vehicle, an inspection
of the appropriate system must be performed. The results of this
inspection must be explained to the customer and documented on an
inspection form. The condition of the vehicle and its components will
indicate what services/part replacements may be "Required" or
"Suggested". In addition, suggestions may be made to satisfy the
requests expressed by the customer.
When a component is suggested or required to be repaired or
replaced, the decision to repair or replace must be made in the
customer's best interest, and at his or her choice given the options
available.
This section lists the various parts and conditions that
indicate a required or suggested service or part replacement.
Although this list is extensive, it is not fully inclusive. In
addition to this list, a technician may make a suggestion. However,
any suggestions must be based on substantial and informed experience,
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AUTO TRANS DIAGNOSIS - R4AW3 & V4AW3
1998 Mitsubishi Montero
1997-98 AUTOMATIC TRANSMISSIONS
Mitsubishi R4AW3 & V4AW3 Electronic Controls
Montero, Montero Sport
APPLICATION
TRANSMISSION APPLICATION \
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Vehicle Transmission Model
Montero Sport 2WD ............................................ R4AW3
Montero & Montero Sport 4WD .................................. V4AW3
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CAUTION: Vehicle is equipped with Supplemental Restraint System (SRS).
When servicing vehicle, use care to avoid accidental air bag
deployment. SRS-related components are located in steering
column, center console, instrument panel and lower panel on
instrument panel. DO NOT use electrical test equipment on
these circuits. If necessary, deactivate SRS before servicing
components. See AIR BAG SERVICING article in APPLICATIONS &
IDENTIFICATION.
DESCRIPTION
Automatic transmission is a 4-speed electronically controlled
transmission. Solenoids that control shift changes are located in
valve body. Solenoids are controlled by a Transmission Control Module
(TCM). TCM receives information from various input devices and uses
this information to control shift solenoids for transmission shifting
and lock-up solenoid for torque converter lock-up.
An Overdrive (OD) switch is mounted on the shift lever. When
OD switch is depressed to ON position, transmission will shift into
4th gear when shift lever is in "D" position, and OD OFF light on
instrument panel will go off. When OD switch is released to OFF
position, transmission will shift into 3rd gear, and OD OFF light on
instrument panel will illuminate.
A pattern select switch is located near shift lever on center
console. Pattern select switch contains a NORMAL and a HOLD operating
position. When pattern select switch is depressed (HOLD position) with\
shift lever in Drive position, transmission starts in 2nd gear.
Upshifts and downshifts will occur at a higher vehicle speed than with
switch in NORMAL position. See MITSUBISHI R4AW3 & V4AW3 OVERHAUL
article. Indicator light on instrument panel indicates pattern select
switch is in HOLD position.
Transmission is equipped with a shift lock and key interlock
system. Shift lock system prevents shift lever from being moved from
Park unless brake pedal is depressed. Key interlock system prevents
ignition key from being moved from ACC to LOCK position on ignition
switch unless shift lever is in Park. See MITSUBISHI SHIFT LOCK
SYSTEMS article.
OPERATION
TCM
TCM receives information from various input devices and uses
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this information to control solenoids on transmission valve body. TCM
controls transmission shifting and torque converter lock-up.
TCM contains a self-diagnostic system, which will store
Diagnostic Trouble Codes (DTC) if failure or problem exists in
electronic control system. DTC can be retrieved to determine problem
area. See SELF-DIAGNOSTIC SYSTEM. TCM is located under left side of
instrument panel, left of steering column. See Fig. 1.
TCM INPUT DEVICES
Brakelight Switch Signal
Brakelight switch delivers input signal to TCM, indicating
vehicle braking. Brakelight switch is located on brake pedal support.
Cruise Control Electronic Control Unit (ECU)
Cruise control ECU delivers an input signal to control
overdrive operation in accordance with vehicle speed when cruise
control is operating. When in overdrive with cruise control on, if
vehicle speed drops 2 MPH less than the set speed, overdrive is
released to prevent reduction in vehicle speed. Once vehicle speed is
more than the set speed, overdrive function is resumed. If coolant
temperature is low, transmission will not shift into overdrive. Cruise
control ECU is located below center A/C vent, behind temperature
control panel on Montero. On Montero Sport, cruise control ECU is
located behind driver's kick panel.
Engine Coolant Temperature Sensor (ECT) Signal
Engine coolant temperature sensor delivers input signal to
TCM, indicating engine coolant temperature. Coolant temperature sensor
is located on engine.
Input & Output Shaft Speed Sensors
Sensors are magnetic pick-ups that monitor input and output
shaft speeds. AC waveforms are input to TCM by sensors. Sensors are
located on front and rear side of transmission case.
OD Switch Signal
The OD switch provides an input signal to TCM to indicate
when overdrive is selected by operator. When OD switch is depressed to
ON position, transmission will shift into 4th gear when shift lever is
in "D" position, and OD OFF light on instrument panel will go off.
When OD switch is released to OFF position, transmission will shift
into 3rd gear, and OD OFF light on instrument panel will come on. The
OD switch is mounted on shift lever.
Oil Temperature Sensor Signal
Oil temperature sensor provides TCM with ATF temperature
values. TCM uses this information to control shift points for maximum
performance. If transmission oil temperature exceeds standard values,
instrument panel ATF - TEMP light will come on. Sensor is mounted to
cooler line at transmission.
Park/Neutral Position (PNP) Switch Signal
PNP switch delivers an input signal to TCM indicating shift
lever position. Switch is located on side of transmission.
Throttle Position (TP) Sensor Signal
TP sensor delivers closed throttle and variable throttle
position input signals to TCM. TP sensor is located on side of
throttle body.
4WD Low Range Detection Switch
4WD low range detection switch provides information to TCM
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when transfer case is in 4WD low-lock range.
Fig. 1: Locating Transmission Control Module (Montero)
Courtesy of Mitsubishi Motor Sales of America.
Fig. 2: Locating Transmission Control Module (Montero Sport)
Courtesy of Mitsubishi Motor Sales of America.
TCM OUTPUT DEVICES
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Shift Solenoids No. 1 & No. 2
TCM controls transmission shifting by delivering an output
signal to operate proper solenoid. Solenoids are located on
transmission valve body. See Fig. 3. Solenoids are operated in
accordance with shift lever range. If a solenoid malfunctions, TCM may
select a preselected gear. See Fig. 4.
NOTE: TCM provides a fail-safe system which will place transmission
in preselected gear depending on solenoid failure. In other
gears, fail-safe system will not be activated and
transmission will be placed in a specified gear. See
Fig. 4.
Lock-Up Solenoid
TCM controls torque converter lock-up by delivering an output
signal to lock-up solenoid. Lock-up solenoid is activated when shift
lever is in "D" position and vehicle is at specified speed. Solenoid
is located on transmission valve body. See Fig. 3.
Fig. 3: Locating Lock-Up & Shift Solenoids
Courtesy of Mitsubishi Motor Sales of America.