sensor MITSUBISHI MONTERO 1998 Workshop Manual
Page 164 of 1501
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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Disconnect electrical connector from coolant temperature
sensor. Using ohmmeter, check resistance between terminals of coolant
temperature sensor. Resistance should be as specified in accordance
with the TEMPERATURE-TO-RESISTANCE VALUES table. Replace coolant
temperature if resistance is not within specification.
TEMPERATURE-TO-RESISTANCE VALUES
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Temperature F (C) Ohms
32 (0) ......................................................... 5.8\
68 (20) ........................................................ 2.4\
104 (40) ....................................................... 1.1\
176 (80) ....................................................... 0.3\
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INPUT SPEED SENSOR
Disconnect solenoid and sensor connector. Using ohmmeter,
measure resistance between terminals No. 9 and No. 10. See Fig. 9.
Resistance should be 560-680 ohms at 68
F (20C). If resistance is not
as specified, replace No. 2 speed sensor.
OIL TEMPERATURE SENSOR
Disconnect solenoid and sensor connector. Using ohmmeter,
check resistance between sensor connector terminals No. 1 and No. 2.
See Fig. 9 . Resistance should be 10 k/ohms when oil temperature is
77
F (25C). With oil temperature at 248F (120C), resistance should
be 615 ohms. If resistance is not as specified, replace oil
temperature sensor.
OUTPUT SPEED SENSOR
Disconnect solenoid and sensor connector. Using ohmmeter,
measure resistance between terminals No. 3 and No. 4. See Fig. 9.
Resistance should be 560-680 ohms at 68
F (20C). If resistance is not
as specified, replace output speed sensor.
OVERDRIVE SWITCH
Using a screwdriver, remove overdrive switch from selector
lever, located below selector lever button. Using a DVOM, check
continuity between overdrive switch terminals No. 3 and 5 with switch
in ON position. Continuity should exist. With switch in OFF position,
check continuity between terminals No. 3 and 4. Continuity should
exist. If continuity is not as specified, replace switch. See Fig. 10.
Fig. 10: Identifying Overdrive Switch Terminals
Courtesy of Mitsubishi Motor Sales of America.
PARK/NEUTRAL POSITION (PNP) SWITCH
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Using a screwdriver, remove pattern select switch from
console. Switch is located at rear of selector lever, to right of
emergency brake handle. Using a DVOM, check continuity between pattern
select switch terminals No. 1 and 2, with switch in HOLD position.
Continuity should exist. With switch in POWER position, check
continuity between terminals No. 1 and 6. Continuity should exist. If
continuity is not as specified, replace switch. See Fig. 12.
Fig. 12: Identifying Pattern Select Switch Terminals
Courtesy of Mitsubishi Motor Sales of America.
SOLENOIDS
For solenoid testing, refer to the appropriate DTC under
DIAGNOSTIC TESTS. To check solenoid operation, apply battery voltage
to appropriate terminal of TCM connector and ground. Ensure operating
sound can be heard when battery voltage is connected. Replace solenoid
if operating sound cannot be heard.
THROTTLE POSITION (TP) SENSOR
For diagnostic and testing information, see appropriate SELF-
DIAGNOSTICS article in ENGINE PERFORMANCE section.
4WD LOW RANGE DETECTION SWITCH
For location and testing information on 4WD low range
detection switch, see appropriate article in AXLE SHAFTS & TRANSFER
CASES.
TCM PIN VOLTAGE CHARTS
Access TCM. See Fig. 1 or 2. Turn ignition on. Using DVOM,
Page 168 of 1501
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
\b
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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
\b
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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
\b
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14 No. 1 Shift Solenoid In 3rd Or 4th Gear 0 Volts
\b
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15 Power Supply Ignition ON Battery
\b
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15 Power Supply Ignition OFF 0 Volts
\b
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16 No. 2 Shift Solenoid In 2nd Or 3rd Gear Battery
\b
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16 No. 2 Shift Solenoid In 1st Or 4th Gear 0 Volts
\b
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17 Diagnostic Test Mode Not Specified Not Specified
\b
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18 Diagnostic Output Scan Tool Not Battery
Connected
\b
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21 Oil Temp Warning Lamp Normal Temp. Range 0 Volts
\b
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21 Oil Temp Warning Lamp For 5 Seconds After Battery
Ign. Is On
\b
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22 Oil Temp Sensor Temp @ 248F (120C) About 1.9
\b
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22 Oil Temp Sensor Temp @ 302F (150C) About 1.1
\b
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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
\b
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26 Ground Engine Idling 0 Volts
\b
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31 Neutral Safety Switch In "L" Position Battery
\b
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31 Neutral Safety Switch Except In "L" 0 Volts
\b
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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
\b
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34 Power Mode Power Mode Selected Battery
\b
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34 4WD Detection Switch 2WD 4 Volts Or
Montero Greater
\b
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34 4WD Detection Switch 4WD 0-1 Volts
Montero
\b
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34 Free Wheel 2WD 4 Volts Or
Montero Engage Switch Greater
Sport
\b
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34 Free Wheel 4WD 0 Volts
Montero Engage Switch
Sport
\b
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35 Output Speed Ignition Off 0 Volts
Sensor Gnd
\b
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35 Output Speed Ignition On 2.5 Volts
Sensor Gnd
\b
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36 Input Speed Sensor Gnd Ignition Off 0 Volts
\b
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36 Input Speed Sensor Gnd Ignition On 2.5 Volts
\b
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37 Overdrive OFF Signal (
1) Steady Driving @ Battery
31 MPH (50 km/h)
\b
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37 Overdrive OFF Signal (
1) Climbing Hill @ 0 - 1
31 MPH (50 km/h)
\b
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38 Engine Ign. Signal Engine @ 3000 RPM .3 - 3.0
\b
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39 Neutral Safety Switch In "D" Position Battery
\b
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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
\b
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41 HOLD Mode HOLD Mode Not Selected 0 Volts
\b
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42 Overdrive Switch Overdrive ON 0 Volts
\b
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42 Overdrive Switch Overdrive OFF Battery
\b
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43 Output Speed Sensor Vehicle Stopped About 2.5
\b
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43 Output Speed Sensor Vehicle Moving Other Than
2.5
\b
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44 Input Speed Sensor Vehicle Stopped About 2.5
\b
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44 Input Speed Sensor Vehicle Moving Other Than
2.5
\b
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45 Coolant Temp Sensor Temp @ 86F (30C) 2.5
\b
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45 Coolant Temp Sensor Temp @ 158F (70C) 0 Volts
\b
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46 MIL Signal Ignition ON .5
4.5 Volts
\b
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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 183 of 1501
FR ............................................ Fill Pipe Restrictor
HO2S .......................................... Heated Oxygen Sensor
MIL .................................... Malfunction Indicator Light
PCV ................................. Positive Crankcase Ventilation
SFI ............................ Sequential Multiport Fuel Injection
SPK ................................................. Spark Controls
SPK-CC ..................................... SPK Computer Controlled
TWC .................................. Three-Way Catalytic Converter
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