1998 MITSUBISHI MONTERO torque

1) Before proceeding, see SERVICE PRECAUTIONS. Deactivate
SRS. See DISABLING & ACTIVATING AIR BAG SYSTEM .
2) Remove components for access to front impact sensors as
necessary. See Fig. 7. Remove front impact sensor mounting bolts.
Slide Green section of connector to release lock. Push down on pawl.
Disconnect electrical connector. Remove front impact sensor.
3) To install, reverse removal procedure. Position sensor
with arrow facing toward front of vehicle. Tighten bolts to
specification. See TORQUE SPECIFICATIONS . Activate SRS. See procedures
under DISABLING & ACTIVATING AIR BAG SYSTEM . Check AIR BAG warning
light for proper system function. SYSTEM OPERATION CHECK.
Fig. 7: Locating Front Impact Sensors
Courtesy of Mitsubishi Motor Sales of America.
ADJUSTMENTS

CLOCKSPRING CENTERING
WARNING: If front wheels are not in straight-ahead position or
clockspring mating marks are not aligned before installing
clockspring, the steering wheel may not turn completely, or
flat cable inside clockspring may be severed, disabling SRS
system and possibly causing serious injury to driver.
With clockspring removed, ensure front wheels are in
straight-ahead position. Turn clockspring fully clockwise, and then
turn it back approximately 3.3 turns counterclockwise to align mating
marks. See Fig. 8.
Fig. 8: Aligning Clockspring Mating Marks
Courtesy of Mitsubishi Motor Sales of America.
WIRE REPAIR
DO NOT repair SRS wiring or harness connectors. If SRS wiring
or harness connectors are faulty, replace faulty wiring harness.
TORQUE SPECIFICATIONS
TORQUE SPECIFICATIONS








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Application Ft. Lbs. (N.m)
Steering Wheel Nut ............................... 29 (39)

ADJUSTMENTS
* PLEASE READ FIRST *
NOTE: For adjustment information on brake pedal height, free play,
parking brake and stoplight switch, see BRAKE SYSTEM article.
WHEEL SPEED SENSOR (WSS)
NOTE: Rear WSS gap adjustment information is not available from
manufacturer.
Front WSS-To-Rotor Gap Adjustment
1) Raise and support vehicle. Remove wheel(s). Inspect senso\
r
pole piece for damage. Repair if necessary. If sensor pole piece is
okay, check WSS-to-rotor gap.
2) Using a feeler gauge, check clearance between sensor pole
and rotor tooth surface. See Fig. 1. Front WSS sensor clearance should
be .008-.390" (0.2-1.0 mm). If clearance is not as specified, loosen
sensor mounting bolt. Adjust sensor position until clearance is within
specification. Tighten sensor mounting bolt to specification. See
TORQUE SPECIFICATIONS .
Fig. 1: Checking Front WSS-To-Rotor Gap
Courtesy of Mitsubishi Motor Sales of America.
TROUBLE SHOOTING
ANTI-LOCK WARNING LIGHT
1) Turn ignition on. ANTI-LOCK warning light should come on

Fig. 16: Locating Electronic Control Unit (ECU)
Courtesy of Mitsubishi Motor Sales of America.
"G" SENSOR
CAUTION: DO NOT turn "G" sensor upside-down or lay unit on its side.
DO NOT drop "G" sensor. DO NOT disassemble unit. Replace "G"
sensor as an assembly.
Removal & Installation
Sensor is located under center console, near shifter. See
Fig. 10 . Remove center console assembly. Disconnect sensor wiring
harnes s connector. Remove sensor. To install, reverse removal
procedure. Tighten bolts to specification. See TORQUE SPECIFICATIONS.
HYDRAULIC UNIT
Removal
Remove brakelines from hydraulic unit. Remove ABS relay box
cover. See Fig. 3. Disconnect ground wire and wiring harness
connectors from hydraulic unit. Remove hydraulic unit retaining nuts.
Carefully remove hydraulic unit.
Installation
To install, reverse removal procedure. Install hydraulic unit
brakelines. Ensure brakelines are installed in correct location. See
Fig. 17. Bleed brake system. See BLEEDING BRAKE SYSTEM.

Removal & Installation
Disconnect WSS connector. Remove WSS bolts. Remove WSS from
vehicle. To install, reverse removal procedure. Sensors are not
interchangeable. Adjust wheel WSS-to-rotor gap. See WHEEL SPEED SENSOR
(WSS) under ADJUSTMENTS. To complete installation, reverse removal
procedure. Tighten WSS bolts to specification. See
TORQUE SPECIFICATIONS .
WHEEL SENSOR ROTOR
Removal & Installation
Remove brake disc. Remove disc assembly. Remove wheel
bearings. Remove axle hub. Remove bolts attaching sensor rotor to hub
assembly. To install, reverse removal procedure.
OVERHAUL
HYDRAULIC UNIT
DO NOT attempt to overhaul or disassemble hydraulic unit. If
hydraulic unit is defective, replace entire assembly.
TORQUE SPECIFICATIONS
TORQUE SPECIFICATIONS








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Application INCH Lbs. (N.m)\
"G" Sensor Mounting Bolt ................................. 80 (9.0)\
Wheel Speed Sensor (WSS) Bolt .................... 84-120 (9.5-14.6\
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WIRING DIAGRAMS

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

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

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.