2000 MITSUBISHI MONTERO lock

23-1
AUTOMATIC
TRANSMISSION
CONTENTS
SERVICE SPECIFICATIONS 2.................
LUBRICANTS 2..............................
SPECIAL TOOLS 2..........................
TROUBLESHOOTING
3.....................................
>70................................

92 ..........................................
ON-VEHICLE SERVICE 94...................
Basic Adjustment Procedures 94.................
Transfer Oil Check 99...........................
Transfer Oil Change 99.........................
Location of Control Components 101..............
Control Component Checks 102..................
Torque Converter Stall Test 105..................
Fluid Pressure Test 106.........................Hydraulic Circuit 110............................
Line Pressure Adjustment 111...................
Selector Lever Operation Check 111..............
Transfer Shift Lever Operation Check 114........
Transmission Control Cable Adjustment 114......
Transfer-ECU Check 115........................
Position Indicator Lamp Check 115...............
TRANSMISSION CONTROL* 116.............
SHIFT LOCK AND KEY INTERLOCK
MECHANISMS* 120..........................
TRANSMISSION ASSEMBLY 122.............
TRANSMISSION OIL COOLER 127...........
A/T-ECU 129................................
TRANSFER-ECU 130........................
WARNING REGARDING SERVICING OF SUPPLEMENTAL RESTRAINT SYSTEM (SRS) EQUIPPED VEHICLES
WARNING!
(1) Improper service or maintenance of any component of the SRS, or any SRS-related component, can lead to personal
injury or death to service personnel (from inadvertent firing of the air bag) or to driver and passenger (from rendering
the SRS inoperative).
(2) Service or maintenance of any SRS component or SRS-related component must be performed only at an authorized
MITSUBISHI dealer.
(3) MITSUBISHI dealer personnel must thoroughly review this manual, and especially its GROUP 52B - Supplemental
Restraint System (SRS) before beginning any service or maintenance of any component of the SRS or any SRS-related
component.
NOTE
The SRS includes the following components: SRS-ECU, SRS warning lamp, air bag module, clock spring, and interconnecting
wiring. Other SRS-related components (that mayhave to be removed/installed in connectionwith SRS service or maintenance) are
indicated in the table of contents by an asterisk(*).


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AUTOMATIC TRANSMISSION -Troubleshooting 23-20
Code No. 22 Input shaft speed sensor systemProbable cause
If no output pulse from the input shaft speed sensor is detected for 1 second or
more while the vehicle is driving at 30 km/h or more in 4th, it isjudged that
there is a short-circuit oropencircuit in the input shaft speed sensor, and code
No. 22 is output.
If code No. 22 is output 4 times, the transmission is locked at 3rd gear (D) or
2nd gear (downshift operation in Sports mode) as a fail-safe measure, and the N
range indicator lampflashes at 1 Hz.DMalfunction of input shaft speed sensor
DMalfunction of reverse clutch retainer
DMalfunction of harness or connector
DMalfunction of engine-A/T-ECU <6G7>
DMalfunction of A/T-ECU<4M4>
LRefer to the Transmission Workshop Manual.
Transient malfunction
(Refer to GROUP 00 - Points to
Note for Transient Malfunctions.)
OK NG
Check the following connectors:
<6G7> D-121,<4M4>D-108
To the nextpage
NG
OKNG
NG
RepairCheck the following connectors:
<6G7> D-122,<4M4>D-108
Replace the engine-A/T-ECU or
A/T-ECU.
OKMUT-
IIData List
DNo. 22 Input shaft speed sensor
OK:Refer to P.23-61 (Data List
Chart).
Repair
OK
NG
NG
Check the trouble symptoms.
OK
Measure at engine-A/T-ECU
connector D-121 <6G7>, or at
A/T-ECU connector D-107 <4M4>.
DMeasure at the ECU terminals
DIgnition switch: ON
D<6G7> Voltage between terminal
81 and earth
D<4M4> Voltage between terminal
43 and earth
OK:0.5 V or less
Replace the engine-A/T-ECU or
A/T-ECU. NGCheck the trouble symptoms.
NG
Check the trouble symptoms.
Check the following connectors:
<6G7> D-121, D-122,<4M4>D-108
Replace the engine-A/T-ECU or
A/T-ECU.
OK
OK
Measure at engine-A/T-ECU
connector D-122 <6G7>, or at
A/T-ECU connector D-108 <4M4>.
DMeasure at the ECU terminals
DDisconnect C-23
DIgnition switch: ON
D<6G7> Voltage between terminal
103 and earth
D<4M4> Voltage between terminal
31 and earth
OK:4.8 - 5.2 V
Measure the output wave pattern of
the input shaft speed sensor at
engine-A/T-ECU connectors D-121
and D-122 <6G7>, or at A/T-ECU
connector D-108<4M4>(using an
oscilloscope).
DVehicle speed: approx. 50 km/h
DShift range: 4th
D<6G7> Voltage between terminal
81 of D-121 and terminal 103 of
D-122
D<4M4> Voltage between terminal
31 of D-108 and terminal 43 of
D-108
OK:A wave pattern such as the
one shown on P.23-69
(Check Procedure Using an
Oscilloscope) should be
output, and the maximum
value should be 4.8 V or
more and the minimumval-
ue should be 0.8 V or less.
There should be no noise
in the output wave pattern.NG
NG
Repair


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AUTOMATIC TRANSMISSION -Troubleshooting 23-22
Code No. 23 Output shaft speed sensor systemProbable cause
If the output from the output shaft speed sensor is 50% or less continuously for
1 second or more while the vehicle is driving at 30 km/h or more in 4th, it is
judged that there is ashort-circuit oropencircuit in the output shaft speed
sensor, and code No. 23 is output.
If code No. 23 is output 4 times, the transmission is locked at 3rd gear (D) or
2nd gear (downshift operation in Sports mode) as a fail-safe measure, and the N
range indicator lampflashes at 1 Hz.DMalfunction of output shaft speed sensor
DMalfunction of direct planetary carrier
DMalfunction of harness or connector
DMalfunction of engine-A/T-ECU <6G7>
DMalfunction of A/T-ECU<4M4>
LRefer to the Transmission Workshop Manual.
NG
Repair
NG
Transient malfunction
(Refer to GROUP 00 - Points to
Note for Transient Malfunctions.)
OK NG
Check the following connectors:
<6G7> D-122,<4M4>D-108
To the nextpage
NG
OK
NG
RepairCheck the following connectors:
<6G7> D-122,<4M4>D-108
Replace the engine-A/T-ECU or
A/T-ECU.
OKMUT-
IIData List
DNo. 23 Output shaft speed
sensor system
OK:Refer to P.23-61 (Data List
Chart).
Repair
OK
OK
NG
Check the trouble symptoms.
OK
Measure at engine-A/T-ECU
connector D-121 <6G7>, or at
A/T-ECU connector D-107 <4M4>.
DMeasure at the ECU terminals
DIgnition switch: ON
D<6G7>Voltage between terminals
81 and earth
D<4M4> Voltage between terminal
43 and earth
OK:0.5 V or less
Replace the engine-A/T-ECU or
A/T-ECU. NGCheck the trouble symptoms.
NG
Check the trouble symptoms.
Check the following connectors:
<6G7> D-121, D-122,<4M4>D-108
Replace the engine-A/T-ECU or
A/T-ECU.
OK
Measure at engine-A/T-ECU
connector D-122 <6G7>, or at
A/T-ECU connector D-108 <4M4>.
DMeasure at the ECU terminals
DDisconnect C-02
DIgnition switch: ON
D<6G7>Voltage between terminals
104 and earth
D<4M4> Voltage between terminal
32 and earth
OK:4.8 - 5.2 VNG
Measure the output wave pattern of
the output shaft speed sensor at
engine-A/T-ECU connectors D-121
and D-122 <6G7>, or at A/T-ECU
connector D-108<4M4>(using an
oscilloscope).
DVehicle speed: approx. 50 km/h
DShift range: 4th
D<6G7> Voltage between terminal
81 of D-121 and terminal 104 of
D-122
D<4M4> Voltage between terminal
32 of D-108 and terminal 43 of
D-108
OK:A wave pattern such as the
one shown on P.23-69
(Check Procedure Using an
Oscilloscope) should be
output, and the maximum
value should be 4.8 V or
more and the minimumval-
ue should be 0.8 V or less.
There should be no noise
in the output wave pattern.NG
Repair
NG


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AUTOMATIC TRANSMISSION -Troubleshooting II>23-88
Item
No.Normal condition Inspection conditions Check item
21Ignition switchIgnition switch: ONON
Ignition switch: OFFOFF
22Transmission identi-
ficationVehicles with A/TA/T
23Stop lamp switchIgnition switch: ONBrake pedal: DepressedON
Engine: StoppedBrake pedal: ReleasedOFF
24Transfer leverTransfer shift lever position: 2HON
switch 2HTransfer shift lever position: Other than the aboveOFF
25Transfer leverTransfer shift lever position: 4HON
switch 4HTransfer shift lever position: Other than the aboveOFF
26Transfer leverTransfer shift lever position: 4HLcON
switch 4HLcTransfer shift lever position: Other than the aboveOFF
27Transfer leverTransfer shift lever position: 4LLcON
switch 4LLcTransfer shift lever position: Other than the aboveOFF
28Engine identificationPetrol vehiclesPETROL
Diesel vehiclesDIESEL
30Freewheel engageDuring 2WDON
solenoid valveDuring 4WDOFF
31Inhibitor switch NSelector lever position: NON
Selector lever position: Other than the aboveOFF
32Inhibitor switch PSelector lever position: PON
Selector lever position: Other than the aboveOFF
332WD switchDriving conditions: 2WD (2H)ON
Driving conditions: Other than the aboveOFF
342WD/4WD switchDriving conditions: 2WD (2H), 4WD (4H)ON
Driving conditions: Other than the aboveOFF
354H switchDriving conditions: 4WD (4H), 4WD (4HLc)ON
Driving conditions: Other than the aboveOFF
36Center differentialDriving conditions: 4WD (4HLc), 4WD (4LLc)ON
lock switchDriving conditions: Other than the aboveOFF
374LLc switchDriving conditions: 4WD (4LLc)ON
Driving conditions: Other than the aboveOFF
38Freewheel engageDuring 2WDOFF
switchDuring 4WDON


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AUTOMATIC TRANSMISSION -Troubleshooting II>23-91
Ter-
minal
No.Standard value Inspection conditions Check item
40Center differential lock
lampDuring 4WD (4HLc or 4LLc)System voltage
41Solenoid valve A, BTransfer shift lever position: 2H1V
Transfer shift lever position: Other than 2HSystem voltage
42EarthAt all times0V
432WD switchTransfer shift lever position: 2H0V
Transfer shift lever position: Other than 2H10.5 V
442WD/4WD switchTransfer shift lever position: 2H or 4H0V
Transfer shift lever position: 4HLc or 4LLc10.5 V
454H switchTransfer shift lever position: 4H or 4HLc0V
Transfer shift lever position: 2H or 4LLc10.5 V
46Center differential lockTransfer shift lever position: 4HLc or 4LLc0V
switchTransfer shift lever position: 2H or 4H10.5 V
474HLc switchTransfer shift lever position: 4LLc0V
Transfer shift lever position: Other than 4LLc10.5 V
50Freewheel engage switchTransfer position: 2WD10.5 V
Transfer position: 4WD0V


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AUTOMATIC TRANSMISSION -
Troubleshooting
23-92
TROUBLESHOOTING MECHANISMS>
DIAGNOSIS FUNCTION
Input signal check procedure
Connect the MUT-II
or a voltage meter to the diagnosis connector, and check the inhibitor switch (reverse)
input signal.
(Refer to GROUP 00 - Guide to Troubleshooting and Inspection Procedures.)
INSPECTION CHART CLASSIFIED BY TROUBLE SYMPTOMS
Trouble SymptomInspection
procedure
No.Reference
page
When the ignition switch is at a position other than the LOCK position, the selector lever
can be moved from the P to the R position even though the brake pedal is not depressed.123-92
When the ignition switch is at a position other than the LOCK position, the selector lever
cannot be moved from the P to the R position even though the brake pedal is being
depressed.223-92
The ignition switch is at the LOCK position, but the selector lever can be moved from the
P to the R position when the brake pedal is depressed.323-93
The selector lever cannot be easily moved from the P to the R position.423-93
The selector lever cannot be moved from the R to the P position.523-93
The ignition key cannot be turned to the LOCK position when the selector lever is at the P
position.623-93
The ignition key can be turned to the LOCK position even when the selector lever is at a
position other than the P position.723-93
INSPECTION PROCEDURES FOR TROUBLE SYMPTOM
Inspection procedure 1
When the ignition switch is at a position other than the
LOCK position, the selector lever can be moved from the
P to the R position even though the brake pedal is not
depressed.
Probable cause
The cause is probably a malfunction of the selector lever assembly lock cam or
of the shift lock cable unit.DMalfunction of lock cam
DMalfunction of shift lock cable unit
Check by referring to the probable causes.
Inspection procedure 2
When the ignition switch is at a position other than the
LOCK position, the selector lever cannot be moved from
the P to the R position even though the brake pedal is
being depressed.
Probable cause
The cause is probably a malfunction of the selector lever assembly, transmission
control cable, shift lock cable unit or the ignition key cylinder lock bar.DMalfunction of selector lever assembly
DMalfunction of transmission control cable
DMalfunction of shift lock cable unit
DMalfunction of lock bar
Check by referring to the probable causes.


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AUTOMATIC TRANSMISSION -Troubleshooting
23-93
Inspection procedure 3
The ignition switch is at the LOCK position, but the
selector lever can be moved from the P to the R position
when the brake pedal is depressed.
Probable cause
The cause is probably a malfunction of the shift lock cable unit or of the ignition
key cylinder lock bar.DMalfunction of shift lock cable unit
DMalfunction of lock bar
Check by referring to the probable causes.
Inspection procedure 4
The selector lever cannot be easily moved from the P to
the R position.
Probable cause
The cause is probably a malfunction of the selector lever assembly, transmission
control cable, shift lock cable unit or the ignition key cylinder lock bar.DMalfunction of selector lever assembly
DMalfunction of transmission control cable
DMalfunction of shift lock cable unit
DMalfunction of lock bar
Check by referring to the probable causes.
Inspection procedure 5
The selector lever cannot be moved from the R to the P
position.
Probable cause
The cause is probably a malfunction of the selector lever assembly or of the
transmission control cable.DMalfunction of selector lever assembly
DMalfunction of transmission control cable
Check by referring to the probable causes.
Inspection procedure 6
The ignition key cannot be turned to the LOCK position
when the selector lever is at the P position.
Probable cause
The cause is probably a malfunction of the selector lever assembly, shift lock
cable unit or the ignition key cylinder lock bar.DMalfunction of selector lever assembly
DMalfunction of shift lock cable unit
DMalfunction of lock bar
Check by referring to the probable causes.
Inspection procedure 7
The ignition key can be turned to the LOCK position even
when the selector lever is at a position other than the P
position.
Probable cause
The cause is probably a malfunction of the shift lock cable unit or of the ignition
key cylinder lock bar.DMalfunction of shift lock cable unit
DMalfunction of lock bar
Check by referring to the probable causes.


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AUTOMATIC TRANSMISSION -On-vehicle ServiceAUTOMATIC TRANSMISSION -On-vehicle Service23-107
HYDRAULIC PRESSURE TEST DIAGNOSIS TABLE
SymptomProblem location
All hydraulic pressures are too highMalfunction of regulator valve
All hydraulic pressures are too lowMalfunction of oil pump
Blocked oil filter
Blocked oil cooler
Malfunction of regulator valve
Malfunction of relief valve
Incorrect valve body installation
Abnormal hydraulic pressure in R range
onlyMalfunction of regulator valve
Abnormal hydraulic pressure in 3rd or 4th
onlyMalfunction of regulator valve
Malfunction of switch bulb
Abnormal UD pressure onlyMalfunction of oil seal K, L, M or Q
Malfunction of underdrive solenoid valve
Malfunction of underdrive pressure control valve
Abnormality with check ball
Blocked orifices
Incorrect valve body installation
Abnormal REV pressure onlyMalfunction of oil seal A, B or C
Abnormality with check ball
Blocked orifices
Incorrect valve body installation
Abnormal OD pressure onlyMalfunction of oil seal D, E or F
Malfunction of overdrive solenoid valve
Malfunction of overdrive pressure control valve
Abnormality with check ball
Blocked orifices
Incorrect valve body installation
Abnormal DIR pressure onlyMalfunction of oil seal R, S or T
Malfunction of low & reverse solenoid valve (also used for the direct
clutch)
Malfunction of low & reverse pressure control valve
Malfunction of switch bulb
Malfunction of fail-safe valve C
Blocked orifices
Incorrect valve body installation
Abnormal LR pressure onlyMalfunction of oil seal I, J or P
Malfunction of low & reverse solenoid valve (also used for the direct
clutch)
Malfunction of low & reverse pressure control valve
Malfunction of switch bulb
Malfunction of fail-safe valve A
Abnormality with check ball
Blocked orifices
Incorrect valve body installation
Abnormal 2ND pressure onlyMalfunction of oil seal G, H or O
Malfunction of second solenoid valve
Malfunction of second pressure control valve
Malfunction of fail-safe valve B
Blocked orifices
Incorrect valve body installation


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