1998 MITSUBISHI MONTERO lock
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If DTC 51 is set also, go to DTC 51: 1ST GEAR RATIO SIGNAL
INCORRECT test. If DTC 51 is not set, check overdrive brake for a
mechanical failure. See OVERDRIVE BRAKE in MITSUBISHI R4AW3 & V4AW3
OVERHAUL article.
SYMPTOM TROUBLE SHOOTING
NOTE: Check system using appropriate scan tool. See WIRING DIAGRAMS
for electrical schematics and COMPONENT TESTING.
COMMUNICATION WITH SCAN TOOL NOT POSSIBLE
If scan tool cannot communicate with TCM, check proper
connection with DLC. Check TCM power circuits, TCM ground circuits and
malfunctioning TCM.
SHIFT POINTS INCORRECT
If shift points are incorrect, check for DTCs. If no DTC is
present, check oil temperature sensor, pattern select switch, 4WD low
range detection switch and TCM for proper operation.
UPSHIFTS OCCUR SPONTANEOUSLY
If upshifting occurs spontaneously, check park/neutral
position switch, overdrive switch and TCM for proper operation.
TCC LOCK-UP MALFUNCTIONING
If TCC lock-up system is not operating properly, check torque
converter, valve body, lock-up switch and oil temperature switch.
COMPONENT TESTING
A/T FLUID TEMPERATURE SWITCH
1) Remove fluid temperature switch, located to rear of
neutral safety switch. Immerse switch in container of ATF up to top
threaded portion of switch. Using a DVOM, check continuity between
switch terminals. Continuity should not exist when fluid temperature
is 257
F (125C) or less.
2) When fluid is heated to 289-304F (143-151C), continuity
should exist. Replace switch if necessary. Apply thread sealant to
fluid temperature switch threads and install in transmission.
BRAKELIGHT SWITCH
1) Disconnect electrical connector from brakelight switch,
located near brake pedal. Using ohmmeter, ensure continuity exists
between terminal No. 2 (White/Red wire) and terminal No. 3 (Green
wire) with brake pedal released. Replace brakelight switch if
continuity does not exist. Continuity should not exist between
terminals No. 2 and No. 3 with brake pedal depressed.
2) If continuity does not exist, ensure brake pedal is
properly adjusted so brakelight switch has proper travel for switch
operation. If proper brakelight switch travel exists, replace
brakelight switch.
ENGINE COOLANT TEMPERATURE (ECT) SENSOR
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backprobe TCM connector. See Fig. 13. Check voltage between designated
terminals on TCM connector and ground. See TCM TERMINAL VOLTAGE
SPECIFICATIONS table. Voltage should be as specified.
Fig. 13: Identifying TCM Terminals
Courtesy of Mitsubishi Motor Sales of America.
TCM TERMINAL VOLTAGE SPECIFICATIONS
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Terminal Circuit Condition Voltage
No.
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1 Lock-Up Solenoid Lock-Up Clutch Engaged Battery
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1 Lock-Up Solenoid Lock-Up Clutch 0 Volts
Disengaged
\b
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2 Back-Up Power Supply At All Times Battery
\b
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5 Brakelight Switch Brake Pedal Depressed 0 Volts
\b
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5 Brakelight Switch Brake Pedal Released Battery
\b
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8 TP Sensor Throttle Closed (Idle) .3-1.0
\b
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8 TP Sensor Throttle Wide Open 4.4-5.0
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11 Neutral Safety Switch In "P" Position Battery
\b
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11 Neutral Safety Switch Except In "P" 0 Volts
\b
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12 Ground Engine Idling 0 Volts
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14 No. 1 Shift Solenoid In 1st Or 2nd Battery
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14 No. 1 Shift Solenoid In 3rd Or 4th Gear 0 Volts
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15 Power Supply Ignition ON Battery
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15 Power Supply Ignition OFF 0 Volts
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16 No. 2 Shift Solenoid In 2nd Or 3rd Gear Battery
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16 No. 2 Shift Solenoid In 1st Or 4th Gear 0 Volts
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17 Diagnostic Test Mode Not Specified Not Specified
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18 Diagnostic Output Scan Tool Not Battery
Connected
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21 Oil Temp Warning Lamp Normal Temp. Range 0 Volts
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21 Oil Temp Warning Lamp For 5 Seconds After Battery
Ign. Is On
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22 Oil Temp Sensor Temp @ 248F (120C) About 1.9
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22 Oil Temp Sensor Temp @ 302F (150C) About 1.1
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23 4WD Low Range Switch 4WD Lever In 4H-Lock Battery
\b
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23 4WD Low Range Switch 4WD Lever In 4L-Lock 0 Volts
\b
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24 Neutral Safety Switch In "R" Position Battery
\b
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24 Neutral Safety Switch Except In "R" 0 Volts
\b
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25 Ground Engine Idling 0 Volts
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26 Ground Engine Idling 0 Volts
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31 Neutral Safety Switch In "L" Position Battery
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31 Neutral Safety Switch Except In "L" 0 Volts
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32 Neutral Safety Switch In "N" Position Battery
\b
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32 Neutral Safety Switch Except In "N" 0 Volts
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34 Power Mode Power Mode Selected Battery
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34 4WD Detection Switch 2WD 4 Volts Or
Montero Greater
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34 4WD Detection Switch 4WD 0-1 Volts
Montero
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34 Free Wheel 2WD 4 Volts Or
Montero Engage Switch Greater
Sport
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34 Free Wheel 4WD 0 Volts
Montero Engage Switch
Sport
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![MITSUBISHI MONTERO 1998 Service Manual 35 Output Speed Ignition Off 0 Volts
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35 Output Speed Ignition Off 0 Volts
Sensor Gnd
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35 Output Speed Ignition On 2.5 Volts
Sensor Gnd
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36 Input Speed Sensor Gnd Ignition Off 0 Volts
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36 Input Speed Sensor Gnd Ignition On 2.5 Volts
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37 Overdrive OFF Signal (
1) Steady Driving @ Battery
31 MPH (50 km/h)
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37 Overdrive OFF Signal (
1) Climbing Hill @ 0 - 1
31 MPH (50 km/h)
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38 Engine Ign. Signal Engine @ 3000 RPM .3 - 3.0
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39 Neutral Safety Switch In "D" Position Battery
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39 Neutral Safety Switch Except In "D" 0 Volts
\b
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40 Neutral Safety Switch In "2" Position Battery
\b
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40 Neutral Safety Switch Except In "2" 0 Volts
\b
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41 HOLD Mode HOLD Mode Selected Battery
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41 HOLD Mode HOLD Mode Not Selected 0 Volts
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42 Overdrive Switch Overdrive ON 0 Volts
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42 Overdrive Switch Overdrive OFF Battery
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43 Output Speed Sensor Vehicle Stopped About 2.5
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43 Output Speed Sensor Vehicle Moving Other Than
2.5
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44 Input Speed Sensor Vehicle Stopped About 2.5
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44 Input Speed Sensor Vehicle Moving Other Than
2.5
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45 Coolant Temp Sensor Temp @ 86F (30C) 2.5
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45 Coolant Temp Sensor Temp @ 158F (70C) 0 Volts
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46 MIL Signal Ignition ON .5
4.5 Volts
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1) - Test circuit with shift lever in "D" position, mode selector
normal and cruise control on.
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REMOVAL & INSTALLATION
BRAKELIGHT SWITCH
Removal & Installation
1) Disconnect electrical connector. Remove lock nut, and
unscrew brakelight switch. To install, screw brakelight switch inward
Page 171 of 1501
until brakelight plunger contacts brake pedal.
2) Loosen brakelight switch 1/2 to one turn. Install and
tighten lock nut on brakelight switch. Install electrical connector.
Ensure brakelights and cruise control operate properly.
INPUT SPEED SENSOR
Removal & Installation
Disconnect electrical connector. Remove bolt securing sensor
to transmission. Remove input speed sensor from transmission. See
Fig. 14 . To install, reverse removal procedure.
Fig. 14: Locating Input Speed Sensor
Courtesy of Mitsubishi Motor Sales of America.
OIL TEMPERATURE SENSOR
Removal & Installation
Sensor is located on transmission connected to cooler line,
near PNP switch. Disconnect electrical connector. Remove oil
temperature sensor from transmission. To install, reverse removal
procedure using NEW gasket.
OUTPUT SPEED SENSOR
Removal & Installation
Page 172 of 1501
Disconnect electrical connector from output speed sensor. See
Fig. 15. Remove bolt and output speed sensor. To install, reverse
removal procedure.
Fig. 15: Locating Output Speed Sensor & Connector
Courtesy of Mitsubishi Motor Sales of America.
PARK/NEUTRAL POSITION (PNP) SWITCH
Removal
Switch is located on side of transmission. Remove manual
lever from control shaft on transmission. Bend up tabs on lock washer.
Remove lock nut, lock washer and seal from control shaft. Remove
retaining bolt and neutral safety switch.
Installation
1) Install switch on control shaft. Loosely install switch
retaining bolt. Install seal and lock washer. Install lock nut and
tighten to specification. See TORQUE SPECIFICATIONS.
2) Switch must be adjusted. Ensure parking brake is applied.
Temporarily install manual lever on control shaft. Place shift lever
in Neutral. Remove manual lever. Rotate switch and align reference
mark on switch with groove.
3) Hold switch in this position. Tighten retaining bolt to
specification. Bend tabs on lock washer over against lock nut. To
install remaining components, reverse removal procedure.
Page 173 of 1501
SOLENOIDS
Removal & Installation
Solenoids are located on transmission valve body. See Fig. 3.
Remove bolt, solenoid and gasket from valve body. To install, reverse
removal procedure.
THROTTLE POSITION SENSOR
NOTE: For removal and installation information, see appropriate
SELF-DIAGNOSTICS article in ENGINE PERFORMANCE section.
TORQUE SPECIFICATIONS
TORQUE SPECIFICATIONS \
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Application INCH Lbs. (N.m)\
Park/Neutral Switch Bolt .................................. 48 (5.4)\
Park/Neutral Switch Lock Nut .............................. 35 (4.0)\
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WIRING DIAGRAMS
Page 177 of 1501
AUTO TRANS DIAGNOSIS
1998 Mitsubishi Montero
1997-98 AUTOMATIC TRANSMISSIONS
Mitsubishi Shift Lock Systems
Diamante, Eclipse, Galant, Mirage, Montero, Montero Sport,
3000GT
DESCRIPTION
Shift interlock system inhibits shift selector lever movement
from "P" to drive ranges unless brake pedal is depressed. Key
interlock system prevents ignition switch turning to LOCK position
unless shift selector lever is in "P" position.
TESTING
KEY INTERLOCK SYSTEM
1) With ignition switch in LOCK position and brake pedal
depressed, ensure selector lever cannot be moved from "P" to any other
position. Ensure selector lever button cannot be pushed. With ignition
switch in ACC position, brake pedal depressed and selector lever
button pushed, ensure selector lever can be moved from "P" position to
any other position. Ensure selector lever moves smoothly.
2) Ensure ignition key cannot be turned to LOCK position at
all selector lever positions other than "P". Ensure ignition key turns
smoothly to LOCK position when selector lever is set to "P" and
selector lever button is released. If key interlock system is not as
specified, adjust key interlock cable. See KEY INTERLOCK CABLE under
ADJUSTMENTS.
SHIFT LOCK SYSTEM
1) With ignition switch in ACC position, brake pedal released
and selector lever button pushed, ensure selector lever cannot be
moved from "P" to any other position. With ignition switch in ACC
position, brake pedal depressed and selector lever button pushed,
ensure selector lever can be moved from "P" position to any other
position.
2) With selector lever in "R" position, ignition switch in
ACC position, brake pedal released and selector button pushed, ensure
selector lever can be moved from "R" to "P" position. If shift lock
system is not as specified, adjust shift lock cable. See SHIFT LOCK
CABLE under ADJUSTMENTS.
ADJUSTMENTS
KEY INTERLOCK CABLE
3000GT
Remove front console assembly. Move selector lever to "P".
Loosen nut securing key interlock cable. Gently press lock cam "A"
down while pushing cable to take up slack. See Fig. 1. Tighten nut to
specifications to secure cable. See TORQUE SPECIFICATIONS.