2000 MITSUBISHI MONTERO Service Repair Manual

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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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 23-23
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
Replace the output shaft speed
sensor.
L(2)NG
(3)NG
NG
Repair
Measure at output 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
Check the harness between the
output shaft speed sensor and the
ignition switch, and repair if
necessary.OKCheck 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.
NG
Eliminate the cause of the noise.Overhaul the A/T.
DReplace the direct planetary
carrier.Check the trouble symptoms.
OK
NG
RepairCheck the following connectors:
<6G7> D-121, D-122, C-24,<4M4>
D-108, C-24
DCheck the harness between the
output shaft speed sensor and
the engine-A/T-ECU (earth line),
and repair if necessary. <6G7>
DCheck the harness between the
output shaft speed sensor and
the A/T-ECU (sensor line), and
repair if necessary.<4M4>
DCheck the harness between the
output shaft speed sensor and
the engine-A/T-ECU (earth line),
and repair if necessary. <6G7>
DCheck the harness between the
output shaft speed sensor and
the A/T-ECU (earth line), and
repair if necessary.<4M4>
DCheck the harness between the
output shaft speed sensor and
the engine-A/T-ECU. <6G7>
DCheck the harness between the
output shaft speed sensor and
the A/T-ECU.<4M4>
DCheck the harness between the
output shaft speed sensor and
the ignition switch.


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AUTOMATIC TRANSMISSION -Troubleshooting 23-24
Code No.25 Wide open throttle switch systemProbable cause
If the wideopen throttleswitch does not turn OFF when the acceleratorpedal is
not depressed, there is a short circuit in the wideopen throttleswitch and
diagnosis code No. 25 is output.DMalfunction of wideopen throttleswitch
DMalfunction of harness and connectors
DMalfunction of engine-A/T-ECU <6G7>
DMalfunction of A/T-ECU<4M4>
Transient malfunction
(Refer to GROUP 00 - Points to Note for Transient
Malfunctions.) OK
OKOK OKNG
OKNG
NG
Check the trouble symptoms.
Replace the engine-A/T-ECU or A/T-ECU.
Measure at Wide open throttleswitch connector D-134
DDisconnect the connector and measure at the harness
side.
DIgnition switch: ON
DVoltage between terminal 1 and earth
OK:System voltageNG
Replace
NG
RepairCheck the following connectors:<6G7-L.H. drive vehicles>
D-122, D-134, <6G7-R.H. drive vehicles> D-122, E-11, D-124,
D-134, <4M4-L.H. drive vehicles> D-109, D-134, <4M4-R.H. drive
vehicles> D-109, E-11, D-124, D-134
Check the following connector: D-14DCheck the harness between the Wideopen throttleswitch
and the engine-A/T-ECU, and repair if necessary. <6G7>
DCheck the harness between the Wideopen throttleswitch
and the A/T-ECU, and repair if necessary.<4M4>
MUT-
IIData list
DNo.25 Wide open throttleswitch
OK:The switch turns ON when fullyopen the accelerator
the switch turns OFF when fully close the accelera-
tor.
Wide open throttleswitch single part check
RepairNG


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AUTOMATIC TRANSMISSION -Troubleshooting 23-25
Code No. 26 Stop lamp switch systemProbable cause
If the stoplampswitch is continuously on for 5 minutes or more while the
vehicle isbeing driven, it is judged that there is ashort-circuit in the stoplamp
switch and code No. 26 is output.DMalfunction of brakepedal
DMalfunction of stoplampswitch
DMalfunction of harness or connector
DMalfunction of engine-A/T-ECU <6G7>
DMalfunction of A/T-ECU<4M4>
NG
NG
MUT-
IIData List
DNo. 26 Stoplampswitch system
OK:The switch turns ON when
brakepedal is depressed
the switch turns OFF when
the brakepedal is released.Transient malfunction
(Refer to GROUP 00 - Points to
Note for Transient Malfunctions.) OK
OK OK OKNG
Repair
Repair
Check the following connectors:
D-26, D-27
D-124, D-27Check the harness between the stop
lampswitch and the battery, and
repair if necessary.
OK OK
NG
Brakepedal heightcheck
(Refer to GROUP 35A - On-vehicle
Service.)
OKNG
Adjust
OK
OK
NG
NG
Check the trouble symptoms.Replace the engine-A/T-ECU or
A/T-ECU.
Check the following connectors:
<6G7-L.H. drive vehicles> D-27, D-26,
D-33, E-13, D-128, D-122,
<6G7-R.H. drive vehicles> D-27, D-124,
E-13, D-128, D-122,
<4M4-L.H. drive vehicles> D-27, D-26,
D-33, E-13, D-128, D-109
<4M4-R.H. drive vehicles> D-27, D-124,
E-13, D-128, D-109Measure at engine-A/T-ECU
connector D-122 <6G7>, A/T-ECU
connector D-109 <4M4>.
DMeasure at the ECU terminals
D<6G7> Voltage between terminals
123 and earth
D<4M4> Voltage between terminal
59 and earth
OK:System voltage when brake
pedal is depressed
1 V or less when the brake
pedal is released
Measure at stoplampswitch
connector D-136.
DDisconnect the connector and
measure at the harness side.
DVoltage between terminals 2 and
earth
OK:System voltageNG
Replace
NG
Repair
Stoplampswitch check
(Refer to GROUP 35A - On-vehicle
Service.)
Check the following connector:
D-136
RepairNG
Check the following connectors:
<6G7> D-122,<4M4>D-109
DCheck the harness between the
stoplampswitch and the
engine-A/T-ECU, and repair if
necessary. <6G7>
DCheck the harness between the
stoplampswitch and the
A/T-ECU, and repair if necessary.
<4M4>
DCheck the harness between the
stoplampswitch and the battery,
and repair if necessary.


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AUTOMATIC TRANSMISSION -Troubleshooting 23-26
Code No. 31 LR solenoid valve systemProbable cause
If the drive terminal voltage of the LR solenoid valve is 3.0 V or less, it is
judged that there is ashort-circuit oropencircuit in the LR solenoid valve, and
the corresponding code is output.
The transmission will be fixed in 3rd as a fail-safe measure, and the N range
indicator will flash at a rate of 1 Hz.DMalfunction of LR solenoid valve
DMalfunction of harness or connector
DMalfunction of engine-A/T-ECU <6G7>
DMalfunction of A/T-ECU<4M4>
LRefer to the Transmission Workshop Manual.
NO
YES
OK
MUT-
IISelf-Diag Code
DIs code No. 54 output?Code No. 54 - A/T control relay system check
(Refer to P.23-103.)
OK NG
Transient malfunction
(Refer to GROUP 00 - Points to Note for Transient
Malfunctions.)MUT-
IIActuator Test
DNo. 1 LR solenoid valve
OK:Sound of operation can be heard
OK
Check the following connectors:<6G7> D-122,<4M4>D-109
OK
NG
NG
Replace the engine-A/T-ECU or A/T-ECU.
Repair
OK
Check the trouble symptoms.
OK
NG
Check the following connectors:E-113, D-12
NG
Repair
Check the harness between the solenoid valve assembly and
the A/T control relay, and repair if necessary.
Check the following connectors:<6G7> D-122, E-113, D-12
<4M4> D-109, E-113,D-12NG
NG
RepairCheck the following connector:C-04
Replace the LR solenoid valve
L
OK
Measure at solenoid valve assembly connector C-04.
DDisconnect the connector and measure at the solenoid
valve side.
DResistance between terminals 6 and 10
OK:2.7 - 3.4
W
OK
Measure at engine-A/T-ECU connector D-122 <6G7>, or at
A/T-ECU connector D-109 <4M4>.
DMeasure at the ECU terminals
DIgnition switch: ON
D<6G7> Voltage between terminal 129 and earth
D<4M4> Voltage between terminal 62 and earth
OK:System voltage
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>
DCheck the harness between the solenoid valve assembly
and the A/T control relay, and repair if necessary.NG
Repair
NG
Measure at solenoid valve assembly connector C-04.
DDisconnect the connector and measure at the harness
side.
DIgnition switch: ON
DVoltage between terminal 10 and earth
OK:System voltage


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