ECU MITSUBISHI MONTERO 2000 Service Repair Manual

22-1
MANUAL
TRANSMISSION
CONTENTS
GENERAL INFORMATION 2..................
LUBRICANTS 2..............................
SEALANTS 2................................
SPECIAL TOOL 2............................
TROUBLESHOOTING 3.............
ON-VEHICLE SERVICE 6.....................
Transmission Oil Check 6.......................
Oil Replacement 6.............................4WD Detection Switch Continuity Check
7...................................
High/Low Detection Switch Continuity Check
7...................................
TRANSMISSION CONTROL 8.......
TRANSMISSION CONTROL 9.......
TRANSMISSION ASSEMBLY 10..............
4WD INDICATOR-ECU/TRANSFER-ECU 17....


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MANUAL TRANSMISSION -Troubleshooting 22-3
TROUBLESHOOTING
For items other than the following service procedures, refer to GROUP 23 - Troubleshooting .
INSPECTION CHART FOR DIAGNOSIS CODES
Diagnosis
codeDiagnosis itemReference page
21Lever position sensor (LPS) system <4D5>Open circuit/Malfunc-
tion of sensor22-3
INSPECTION PROCEDURE FOR DIAGNOSIS CODES
Code No.21 Lever position sensor (LPS) system <4D5>Probable cause
If the LPS output voltage becomes 0.2 V or less at idling, code No.21 will be
set as opencircuit or maladjustment of the LPS.DMalfunction of the LPS
DMalfunction of harness or connector
DMalfunction of transfer-ECU
DMalfunction of the glow-ECU
NGOK
NG
Repair
MUT-II Data list
DNo.1 LPS
OK:Refer to P.23-5, DATA LIST
REFERENCE TABLE.
NG
ReplaceCheck the LPS.
(Refer to GROUP 17 - Emission
Control System)
OK
NG
Repair
OK
Check the following connector:
B-02
OK
OK
Check the following connector:D-114
Repair
NG
Repair
NG
Repair
OK
OK
Check the following connector:D-114
Measure at glow-ECU connector
D-114.
DECU terminal voltage
measurement
DIgnition switch: ON
DVoltage between terminal 7 and
earth
OK:4.8 - 5.2 V
NGNG
NGCheck the trouble symptoms.
OK
Measure at LPS connector B-02.
DDisconnect the connector and
measure at the harness side.
DVoltage between 2 and earth
(Ignition switch: ON)
OK:4.8 - 5.2 V
To the nextpage
Intermittent malfunction
(Refer to GROUP 00 - Points to
Note for Transient Malfunctions.)
OK
Check the harness wire between the
LPS and the glow-ECU, and repair if
necessary.
Check the harness wire between the
LPS and the glow-ECU, and repair if
necessary.
Replace the glow-ECU.


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MANUAL TRANSMISSION -Troubleshooting 22-4
OKOKOK
NG
NG
NG(1),(2) NG
Check the following connector:D-114
Repair OK
OK
OK
Measure at transfer-ECU connector
E-105.
DECU terminal voltage
measurement
DIgnition switch: ON
DVoltage between terminal 5 and
earth
OK:Acceleratorpedalfully
closed
800 - 1,000 mV
Acceleratorpedalfully de-
pressed
3,700 - 4,900 mV
Check the following connector:E-105
Check the trouble symptoms.OK
Check the following connectors:
E-105, E-113 NG
Replace the transfer-ECU. OK
NGRepairAdjust
Check the harness wire between the
LPS and the transfer-ECU, and
repair if necessary.
Check the harness wire between the
LPS and the transfer-ECU, and
repair if necessary.
From the previouspage
(3)NG
Measure at LPS connector B-02.
DUse the test harness
(MD998464) to connect connector
terminals No. 1, No. 2, No.3
only, and measure at the pick-up
harness.
DIgnition switch: ON
(1) Voltage between terminal 3 and
earth
OK:0.5 V or less
(2) Voltage between 2 and earth
(Ignition switch: ON)
OK:4.8 - 5.2 V
(3) Voltage between terminal 1 and
earth
OK:Acceleratorpedalfully re-
leased
800 - 1,000 mV
Acceleratorpedalfully de-
pressed
3,700 - 4,900 mV
NGAdjust the LPS.
(Refer to GROUP 17 - Emission
Control System)
Check the following connectors:
E-113, E-105
Repair
Check the harness wire between the
LPS and the glow-ECU, and repair if
necessary.


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MANUAL TRANSMISSION -Troubleshooting 22-5
DATA LIST REFERENCE TABLE
Data
list No.Check itemCheck conditionsNormal condition
1Lever positionEngine: StoppedAccelerator pedal: Fully closed800 - 1,000 mV
sensor (LPS)
<4D5>Selector lever position:
PAccelerator pedal: DepressedGradually increases from
the above value.
Accelerator pedal: Fully open3,700 - 4,900 mV
CHECK AT TRANSFER-ECU TERMINAL
Ter-
minal
No.Check itemCheck conditionsStandard value
5Lever position sensorAccelerator pedal: Fully closed (engine stopped)0.8 - 1.0 V
(LPS) <4D5>Accelerator pedal: Fully open (engine stopped)3.7 - 4.9 V


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MANUAL TRANSMISSION -4WD Indicator-ECU/Transfer-ECU22-18
Terminal No.Inspection itemInspection condition
1: Ignition switchInspection condition
2: Transfer lever positionTerminal voltage
1Free wheel engageON2HSystem voltage
switch
4H*10V
24WD detectionON2HSystem voltage
switch
4H, 4L0V
3Ignition switch (IG1)OFF-0V
ON-System voltage
6HI/LOW detection
switchONShifting from 4H to 4L
or vice versaSystem voltage
2H, 4H, 4L0V
7Free wheel clutchON4H, 4L0V
changeover solenoid
valve
2H*2System voltage
104WD Indicator lampON2H0V
4H, 4LSystem voltage
NOTE
*1:When vehicle has been moved once.
*2:Shift the lever from 4H to 2H, and then turn the ignition switch to OFF and then back to ON.
TRANSFER-ECU
Measure the terminal voltage (Refer to P.22-3).


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MANUAL TRANSMISSION -Gneral/Troubleshooting 22-1
GROUP 22
MANUAL TRANSMISSION
GENERAL
OUTLINE OF CHANGE
With additional vehicle with Emission Regulation Step III compatible 4D5 engine, the service procedure
different from service adjustment procedure of the vehicle with 4D5 engine has been established.
TROUBLESHOOTING
INSPECTION CHART FOR DIAGNOSIS CODE
Diagnosis
codeDiagnosis itemReference page
21Accelerator pedal position sensor (APS) system
<4D5>Open circuit/Malfunc-
tion of sensor22-1
INSPECTION PROCEDURE FOR DIAGNOSIS CODE
Code No.21 Accelerator pedal position sensor (APS)
system <4D5>Probable cause
Code No.21 is output to indicate an open circuit in the APS or an incorrect
adjustment when the APS output voltage drops below 0.2 V while the engine is
idling.DMalfunction of APS
DMalfunction of harness or connector
DMalfunction of transfer-ECU
DMalfunction of engine-ECU
NGNG
NG
Repair
MUT-IIData List
DNo. 1 APS
OK:Refer to P.22-2 (Data List
Reference Table).
NG
ReplaceAPS check
OK
NG
Repair
OK
Check the following connector:
D-135
OK
OK
Check the following connector:D-112
Repair
NG
Repair
NG
Repair
OK
DCheck the harness between the
APS and the engine-ECU.
OK
Check the following connectors:
D-135, D-112
Measure at engine-ECU connector
D-112.
DMeasure at ECU terminal.
DIgnition switch: ON
DVoltage between terminal 60 and
earth
OK:4.8 - 5.2 V
NGNG
NGCheck the trouble symptoms.Replace the engine-ECU.
OK
Measure at APS connector D-135
DDisconnect the connector and
measure at the harness side.
DVoltage between terminal 8 and
earth
(Ignition switch: ON)
OK:4.8 - 5.2 V
To the next page
Transient malfunction
(Refer to GROUP 00 - Points to
Note for Transient Malfunctions.)
OK
Replace the engine-ECU.


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MANUAL TRANSMISSION -Troubleshooting 22-2
OKOK OK
NG
NG
NG(1), (2)
NG
Check the following connector:D-112Repair OK
DCheck the harness between the
APS and the engine-ECU, and
repair if necessary.OK
Measure at transfer-ECU connector
E-105
DMeasure at ECU terminals.
DIgnition switch: ON
DVoltage between terminal 5 and
earth
OK:Fully close the accelerator
985 - 1,085 mV
fully open the accelerator
4,000 mV or more
Check the following connector:E-105
Check the trouble symptoms.OK
Check the following connectors:
E-105, E-113 NG
Replace the transfer-ECU. OK
NGRepair
Check the harness between the APS
and the transfer-ECU, and repair if
necessary.
Check the harness between the APS
and the transfer-ECU, and repair if
necessary.
From the previous page
(3) NG
Measure at APS connector D-135.
DUse the test harness to connect
only terminals 6, 7 and 8, and
measure at the pickup harness.
DIgnition switch: ON
(1) Voltage between terminal 7 and
earth
OK:0.5 V or less
(2) Voltage between terminal 8 and
earth
OK:4.8 - 5.2 V
(3) Voltage between terminal 6 and
earth
OK:Fully close the accelerator
985 - 1,085 mV
fully open the accelerator
4,000 mV or more
APS adjustment
Check the following connectors:
E-113, E-105
Repair
DATA LIST REFERENCE TABLE
Data
list No.Check itemCheck conditionsNormal condition
1Accelerator ped-
alpositionsen
Engine: Stopped
Sllii
Accelerator pedal: Fully closed985 - 1,085 mV
al position sen-
sor (APS)
<4D5>Selector lever position:
PAccelerator pedal: DepressedGradually increases from
the above value.
<4D5>
Accelerator pedal: Fully open4,000 mV or more
CHECK AT TRANSFER-ECU TERMINAL
Ter-
minal
No.Check itemCheck conditionsStandard value
5Accelerator pedal position
(APS)4D5
Accelerator pedal: Fully closed (engine stopped)0.985 - 1.085 Vpp
sensor (APS) <4D5>Accelerator pedal: Fully open (engine stopped)4.0 V or more


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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 23-6
No.Inspection pro-
cedure if there is
an abnormality Diag-
nosis
code
No. Check item Judgment value Test/operation Pre-test/opera-
tion conditions
3Ignition switch:
START
Engine: StoppedStarting test at P or N
positionStarting should be
possibleStarting pos-
sible/not
possible-Starting not
possible
4Driving after en-
gine has warmed
upDrive for 15 minutes
or more until the A/T
fluid temperature
rises to 70 - 80_
C.Data list No.15
Gradually rises to 70
-80_
CA/T fluid tem-
perature
sensor15A/T fluid temper-
ature sensor sys-
tem
5Engine: Idling
Selector lever
position: NBrake pedal (re-test)
(1) Depressed
(2) ReleasedData List No. 26
(1) ON
(2) OFFStop lamp
switch26Stop lamp switch
system
A/C switch
(1) ON
(2) OFFData List No. 65
(1) ON
(2) OFFDual pres-
sure switch-Dual pressure
switch system
Accelerator pedal
(1) Fully closed
(2) ApplyData List No. 21
(1) The engine
speed displayed
on the tachome-
ter is identical to
the engine
speed displayed
on MUT-II.
(2) Gradually in-
creases from (1)Crank angle
sensor
<6G7>
Engine
speed sen-
sor
<4M4>21Crank angle sen-
sor system
<6G7>
Engine speed
sensor system
<4M4>
Data List
No.73 <6G7>
No.76 <4M4>
(2) Data changes.Communica-
tion with en-
gine-ECU51Serial commu-
nication system
Selector lever posi-
tionNo abnormal shock
during shiftingMalfunction
when start--Engine stalls dur-
ing shifting
(1) N to D
(2) N to RWithin 2 seconds of
time laging off-N-to-D shocks,
large time lag
-N-to-R shocks,
large time lag
-N-to-D, N-to-R
shocks, large
time lag
Driving not
possible-Does not move
forward
-Does not reverse
-Does not move
(forward or re-
verse)


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AUTOMATIC TRANSMISSION -Troubleshooting 23-12
CHART CLASSIFIED BY DIAGNOSIS CODE
Diagnosis
codeDiagnosis itemReference page
11Accelerator pedal position sensor (APS) systemShort-circuit23-13
12Open circuit23-14
14Incorrect sensor
adjustment23-15
15A/T fluid temperature sensor systemOpen circuit23-17
21Crank angle sensor system <6G7> or engine speed sensor
system <4M4>Open circuit23-18
22Input shaft speed sensor systemShort-circuit/Open
circuit23-20
23Output shaft speed sensor systemShort-circuit/Open
circuit23-22
25Wide open throttle switch systemShort-circuit/Open
circuit23-24
26Stop lamp switch systemShort-circuit23-25
31LR solenoid valve systemShort-circuit/Open
circuit23-26
32UD solenoid valve systemShort-circuit/Open
circuit23-27
332nd solenoid valve systemShort-circuit/Open
circuit23-28
34OD solenoid valve systemShort-circuit/Open
circuit23-29
35RED solenoid valve systemShort-circuit/Open
circuit23-30
36DCC solenoid valve systemShort-circuit/Open
circuit23-31
411st without completion of shifting23-32
422nd without completion of shifting23-34
433rd without completion of shifting23-36
444th without completion of shifting23-38
455th without completion of shifting23-40
46Reverse without completion of shifting23-42
51Problem communicating with engine-ECU23-43
52Damper clutch control systemSystem malfunc-
tion23-44
54A/T control relay systemShort-circuit to
earth/Open circuit23-45
56N range lamp systemShort-circuit to
earth23-46


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