2000 MITSUBISHI MONTERO transmission speed sensor

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 23-7
No.Inspection pro-
cedure if there is
an abnormality Diag-
nosis
code
No. Check item Judgment value Test/operation Pre-test/opera-
tion conditions
6Selector lever
position:
Sports mode
(Must be done on
a level and
straight road.)Selector lever posi-
tion and engine
(1) Idling in 1st
(Vehicle
stopped)
(2) Driving at aData List No. 63
(2) 1st
(3) 2nd
(4) 3rd
(5) 4th
(6) 5thShift condi-
tion--
constant speed
of 10 km/h in 1st
(3) Driving at a
constant speed
of 30 km/h in 2nd
(4) Driving at a
constant speedData List No. 31
(2) 0%
(3) 100%
(4) 100%
(5) 100%
(6) 100%Low & re-
verse sole-
noid valve
(LR solenoid
valve)31LR solenoid
valve system
constant speed
of 50 km/h in 3rd
(5) Driving at a
constant speed
of 50 km/h in 4th
(6) Driving at a
constant speed
Data List No. 32
(2) 0%
(3) 0%
(4) 0%
(5) 0%
(6) 100%Underdrive
solenoid
valve (UD
solenoid
valve)32UD solenoid
valve system
of 70 km/h in 5th
(Each condition
should be main-
tained for 10 seconds
or more)
Data List No. 33
(2) 100%
(3) 0%
(4) 100%
(5) 100%
(6) 0%Second sole-
noid valve
(2ND sole-
noid valve)332nd solenoid
valve system
Data List No. 34
(2) 100% (5) 0%
(3) 100% (6) 0%
(4) 0%Overdrive
solenoid
valve (OD
solenoid
valve)34OD solenoid
valve system
Data List No. 35
(2) 0% (5) 100%
(3) 0% (6) 100%
(4) 0%Reduction
solenoid
valve (RED
solenoid
valve)35RED solenoid
valve system
Data List No. 29
(1) 0 km/h
(5) 50 km/hVehicle
speed sen-
sor-Vehicle speed
sensor system
Data List No. 22
(5) 1,300 - 1,600
r/minInput shaft
speed sen-
sor22Input shaft
speed sensor
system
Data List No. 23
(5) 1,300 - 1,600
r/minOutput shaft
speed sen-
sor23Output shaft
sensor system
Selector lever posi-
tion and engine
(1) Driving at 30
km/h in 2 range,Data List No. 36
(1) 70% - 90% to
0%
(2) 70% - 90%Damper
clutch con-
trol solenoid
valve (DCC36
52DCC solenoid
valve system
then fully close
the accelerator.
(2) Driving at a
constant speed
of 50 km/h in 4thData List No. 52
(1) - 300 - - 100
r/min or 100 -
300 r/min
(2) - 10 - 10 r/minsolenoid
valve)


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AUTOMATIC TRANSMISSION -Troubleshooting 23-8
No.Inspection pro-
cedure if there is
an abnormality Diag-
nosis
code
No. Check item Judgment value Test/operation Pre-test/opera-
tion conditions
7Suspends the
INVECS-IIfunc-Use the MUT-IIto
monitor data list Nos.For (1), (2) and (3),
the output shaftProblem dur-
ing shifting-Shocks, engine
racing
tion using MUT-II11, 23 and 63.speed (vehicleIncorrect-All pointsSelector level
position:D(1) Accelerate to 5th
gear at an APSspeed) should be
identical, and thereshift points-Some points
(Must be done on
a level andgear at an APS
output of 1.5 V
(opening angleshould be no abnor-
mal shocks. For (4),No shifting-No diagnosis
codes
straight road.)30%).
(2) Slowly deceler-
ate and stop.(5) and (6), down-
shifting should occur
immediately after
22Input shaft speed
sensor system
ate and stop.
(3) Accelerate to 5th
gear at an APSthe operation is car-
ried out.23Output shaft sen-
sor system
output of 2.5 V
(opening angle
50%).No shifting
from 1st to31LR solenoid
valve system
50%).
(4) At 60 km/h in 5th,
select Sports2nd, or no
shifting from332nd solenoid
valve system
mode and shift
down to 4th.
(5) At 40 km/h in 4th,
select Sports2nd to 1st411st without
completion of
shifting
select Sports
mode and shift
down to 3rd.
(6) At 20 km/h in 3rd,
422nd without
completion of
shifting
shift down to 2nd.
(7) At 20 km/h in
2nd, shift downNo shifting
from 2nd to332nd solenoid
valve system
2nd, shift down
to 1st.3rd, or no
shifting from34OD solenoid
valve system
3rd to 2nd422nd without
completion of
shifting
433rd without
completion of
shifting
No shifting
from 3rd to31LR solenoid
valve system
4th, or no
shifting from35RED solenoid
valve system
4th to 3rd433rd without
completion of
shifting
444th without
completion of
shifting
No shifting
from 4th to32UD solenoid
valve system
5th, or no
shifting from332nd solenoid
valve system
5th to 4th444th without
completion of
shifting
455th without
completion of
shifting


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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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AUTOMATIC TRANSMISSION -Troubleshooting AUTOMATIC TRANSMISSION -Troubleshooting AUTOMATIC TRANSMISSION -Troubleshooting 23-18
OK
(2)NG
From the previouspage
Repair
OK
Repair
Check the following connector:E-113
Repair
Measure at solenoid valve assembly
connector C-04.
DDisconnect the connector and
measure at the harness side.
(1) Voltage between terminal 1 and
earth
(Ignition switch: ON)
OK:4.8 - 5.2 V
(2) Resistance between terminal 2
and earth
OK:2
Wor lessOK
OK
OKNG NG (1)NG
NG
DCheck the harness between the
solenoid valve assembly and the
engine-A/T-ECU (earth line), and
repair if necessary. <6G7>
DCheck the harness between the
solenoid valve assembly and the
A/T-ECU (earth line), and repair if
necessary.<4M4>
DCheck the harness between the
solenoid valve assembly and the
engine-A/T-ECU (power supply
line), and repair if necessary.
<6G7>
DCheck the harness between the
solenoid valve assembly and the
A/T-ECU (power supply line), and
repair if necessary.<4M4>
DCheck the harness between the
solenoid valve assembly and the
engine-A/T-ECU, and repair if
necessary. <6G7>
DCheck the harness between the
solenoid valve assembly and the
A/T-ECU, and repair if necessary.
<4M4>Check the following connector:E-113
Check the following connector:E-113
Code No. 21 Crank angle sensor <6G7> or engine speed
sensor <4M4> systemProbable cause
If no output pulse from the crankanglesensor orenginespeed sensor is
detected for 5 seconds or more when the vehicle speed is 25 km/h or more, it
is judged that there is an opencircuit in the crankanglesensor or anopen
circuit in theenginespeed sensor, and code No. 21 is output.DMalfunction of crankshaft sensingblade<6G7>
DMalfunction of crankanglesensor <6G7>
DMalfunction of enginespeed sensor<4M4>
DMalfunction of harness or connector
DMalfunction of engine-A/T-ECU <6G7>
DMalfunction of A/T-ECU<4M4>
Check the following connectors:
<6G7> B-52,<4M4>B-36Repair
Transient malfunction
(Refer to GROUP 00 - Points to
Note for Transient Malfunctions.)
OK NG
NGOKMUT-
IIData List
DNo. 21 Crankanglesensor
<6G7>
No. 21 Engine speed sensor
<4M4>
OK:Refer to P.23-61 (Data List
Chart).
To the nextpage


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AUTOMATIC TRANSMISSION -Troubleshooting 23-19
OK NGCheck the following connectors:
<6G7> D-120,<4M4> D-113, D-108 OK OK
Repair OK Repair
OK
DCheck the harness between the
crankanglesensor and body
earth, and repair if necessary.
<6G7>
DCheck the harness between the
injection pumpassembly and
body earth, and repair if
necessary.<4M4> (1)NG
(2)NG
OK
NG
Measure at engine-A/T-ECU
connector D-120 <6G7>, or at
A/T-ECU connector D-107 <4M4>.
DMeasure at the ECU terminals
DDisconnect connector B-52
<6G7>, or connector B-36
<4M4>.
DIgnition switch: ON
D<6G7> Voltage between terminal
45 and earth
D<4M4> Voltage between terminals
33 and earth
OK:4.8 - 5.2 V
NG
RepairCheck the following connectors:
<6G7> D-120,<4M4> D-113,D-108
NG
Check the trouble symptoms.
Replace the engine-A/T-ECU or
A/T-ECU.
NG
Repair
OKCheck the following connector:
B-25X
(3)NG
OK
Measure at crankanglesensor
connector B-52 <6G7>, or at
injection pumpassembly connector
B-36 <4M4>.
DDisconnect the connector and
measure at the harness side.
(1) <6G7> Resistance between
terminal 1 and earth
<4M4>Resistance between
terminal 4 and earth
OK:2
Wor less
(2) Voltage between terminal 2 and
earth
(Ignition switch: ON)
OK:4.8 - 5.2 V
(3) Voltage between terminal 3 and
earth
(Ignition switch: ON)
OK:System voltageNG
DCheck the harness between the
crankanglesensor and the
engine-A/T-ECU, and repair if
necessary. <6G7>
DCheck the harness between the
injection pumpassembly and the
A/T-ECU, and repair if necessary.
<4M4>
Check the following connectors:
<6G7> B-52,<4M4>B-36
DCheck the harness between the
crankanglesensor and the
engine controlrelay, and repair if
necessary. <6G7>
DCheck the harness between the
injection pumpassembly and the
engine controlrelay, and repair if
necessary.<4M4>
From the previouspage
OK
NG
Replace the engine-A/T-ECU or
A/T-ECU.
Check the trouble symptoms.
Repair NG
NG
Replace the crankshaft sensing
blade. <6G7>
Replace the crankanglesensor
<6G7> or theenginespeed sensor
<4M4>.
Check the trouble symptoms.
Check the following connectors:
<6G7> B-52, D-120, B-25X
<4M4> D-108, D-113,B-36, B-25X
OK
OK
DCheck the harness between the
crankanglesensor and the
engine-A/T-ECU, and repair if
necessary. <6G7>
DCheck the harness between the
enginespeed sensor and the
A/T-ECU, and repair if necessary.
<4M4>
DCheck the harness between the
crankanglesensor and the
engine controlrelay, and repair if
necessary. <6G7>
DCheck the harness between the
enginespeed sensor and the
engine controlrelay, and repair if
necessary.<4M4>
DCheck the harness between the
crankanglesensor and body
earth, and repair if necessary.
<6G7>
DCheck the harness between the
enginespeed sensor and body
earth, and repair if necessary.
<4M4>
Measure the output wave pattern at
crankanglesensor connector
B-52 <6G7>, or at injectionpump
assembly connector B-36<4M4>
(using an oscilloscope).
DUse the test harness (MD998478)
to connect the terminals, and
then measure at the pickup
harness.
DEngine: Idling
DSelector lever position: P
DVoltage between terminal 2 and
earth
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 0.6 V or less.
There should be no noise
in the output wave pattern.NG NG
Repair NG
Repair
DCheck the harness between the
crankanglesensor and the
engine-A/T-ECU. <6G7>
DCheck the harness between the
injection pumpassembly and the
A/T-ECU.<4M4>


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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 23-21
(3)NG
From the previouspage
OK(1)NG
NG
Repair
Check the following connector:E-113
OK
NG
Repair
Check the following connector:E-113
OK(2)NGNG
Repair
Check the harness between the
input shaft speed sensor and the
ignition switch, and repair if
necessary.Check the following connectors:
D-208, D-213, D-32, E-115
NG
Check the trouble symptoms.
OK
NG
RepairCheck the following connectors:
D-208, D-213, D-32, E-115, E-113
NG
Repair
OK
NG
Check the trouble symptoms.
OK
Eliminate the cause of the noise.Overhaul the A/T.
L
DReplace the reverse clutch
retainer.Check the trouble symptoms.
Replace the input shaft speed
sensor.
LOK
OK
NG
RepairCheck the following connectors:
<6G7> D-121, D-122, C-23,<4M4>
D-108, C-23OK
DCheck the harness between the
input shaft speed sensor and the
engine-A/T-ECU (earth line), and
repair if necessary. <6G7>
DCheck the harness between the
input shaft speed sensor and the
A/T-ECU (earth line), and repair if
necessary.<4M4>
DCheck the harness between the
input shaft speed sensor and the
engine-A/T-ECU (sensor line),
and repair if necessary. <6G7>
DCheck the harness between the
input shaft speed sensor and the
A/T-ECU (sensor line), and repair
if necessary.<4M4>
Measure at input shaft speed sensor
connector C-23.
DDisconnect the connector and
measure at the harness side.
(1) Resistance between terminal 1
and earth
OK:2
Wor less
(2) Voltage between terminal 2 and
earth
(Ignition switch: ON)
OK:4.8 - 5.2 V
(3) Voltage between terminal 3 and
earth
(Ignition switch: ON)
OK:System voltage
DCheck the harness between the
input shaft speed sensor and the
engine-A/T-ECU (earth line).
<6G7>
DCheck the harness between the
input shaft speed sensor and the
A/T-ECU (earth line).<4M4>
DCheck the harness between the
input shaft speed sensor and the
ignition switch.


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