MITSUBISHI MONTERO 2000 Service Repair Manual

AUTOMATIC TRANSMISSION -Troubleshooting <A/T>23-30
Code No. 35 RED solenoid valve systemProbable cause
If the drive terminal voltage of the RED solenoid valve is 3.0 V or less, it is
judged that there is ashort-circuit oropencircuit in the RED 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 RED 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.
Repair
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.5 RED 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
NG
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
NGCheck the following connector:C-04
Replace the RED 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 8 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 119 and earth
D<4M4> Voltage between terminal 51 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.
RepairNG
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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AUTOMATIC TRANSMISSION -Troubleshooting <A/T>23-31
Code No. 36 DCC solenoid valve systemProbable cause
If the drive terminal voltage of the DCC solenoid valve is 3.0 V or less, it is
judged that there is ashort-circuit oropencircuit in the DCC solenoid valve, and
code No. 36 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 DCC 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.)
OKNG
Transient malfunction
(Refer to GROUP 00 - Points to Note for Transient
Malfunctions.)MUT-
IIActuator Test
DNo. 6 DCC solenoid valve
OK:Sound of operation can be heard
OK
Check the following connectors:<6G7> D-122,<4M4>D-107
OK
NG
NG
Replace the engine-A/T-ECU or A/T-ECU.
Repair
OK
NG
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-107, E-113,D-12NG
NG
RepairCheck the following connector:C-04
Replace the DCC solenoid valve.
L
OK
Measure at solenoid valve assembly connector C-04.
DDisconnect the connector and measure at the solenoid
valve side.
D<4M4>Resistance between terminal 7 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-107 <4M4>.
DMeasure at the ECU terminals.
DIgnition switch: ON
D<6G7> Voltage between terminal 107 and earth
D<4M4> Voltage between terminal 15 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.RepairNG
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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AUTOMATIC TRANSMISSION -Troubleshooting <A/T>23-32
Code No.41 1st without completion of shiftingProbable cause
If the output shaft speed sensor output multiplied by the 1st gear ratio is not
identical to the input shaft speed sensor output after shifting to 1st, code No. 41
is output.
If code No. 41 is output 4 times, the transmission is fixed in 3rd and the N
range lampflashes at a rate of 1 Hz.DMalfunction of input shaft speed sensor
DMalfunction of output shaft speed sensor
DMalfunction of harness or connector
DMalfunction of solenoid valve
DMalfunction of reverse clutch retainer
DMalfunction of direct planetary carrier
DMalfunction of LR brake system
DMalfunction of UD clutch system
DMalfunction of RED brake system
DMalfunction of one-way clutch system
DMalfunction of engine-A/T-ECU <6G7>
DMalfunction of A/T-ECU<4M4>
DNoise is generated.
LRefer to the Transmission Workshop Manual.
Repair
NO
YES
YES
MUT-
IISelf-Diag Code
DIs code No. 22 output?Code No. 22 Input shaft speed sensor system check
(Refer to P.23-20.)
OKNO
Code No. 23 Input shaft speed sensor system check
(Refer to P.23-22.)MUT-
IIActuator Test
DIs code No. 23 output?
NG
NGMUT-
IIActuator Test
DNo.1 LR solenoid valve
DNo.2 UD solenoid valve
DNo.3 2ND solenoid valve
DNo.4 OD solenoid valve
DNo.5 RED solenoid valve
OK:The sound of operation should be heard.Replace the appropriate solenoid valve.
L
DCheck the harness between the input shaft speed sensor
and the engine-A/T-ECU. <6G7>
DCheck the harness between the input shaft speed sensor
and the A/T-ECU.<4M4>
Replace the input shaft speed sensor.
LNG
Check the trouble symptoms.
Overhaul the A/T.
L
DReplace the reverse clutch retainer.
Check the trouble symptoms.
Eliminate the cause of the noise.To the nextpage
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
<6G7> Voltage between No.81 (D-121) and No.103 (D-122)
<4M4> Voltage between No.31(D-108) and No.43 (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 minimumvalue should be 0.8 V or less. There
should be no noise in the output wave pattern.
OKOK
NG
NG


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AUTOMATIC TRANSMISSION -Troubleshooting <A/T>23-33
NG
Replace the valve body assembly.
L
Check the trouble symptoms.
Replace the engine-A/T-ECU or A/T-ECU.
Check the trouble symptoms.
Repair
OK
NGDCheck 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>
Replace the output shaft speed sensor.
L OK
Check the trouble symptoms.
Overhaul the A/T.
L
DReplace the direct planetary carrier.
Check the trouble symptoms.
Eliminate the cause of the noise.
To the nextpage
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
<6G7> Voltage between No.81 (D-121) and No.104 (D-122)
<4M4> Voltage between No.32(D-108) and No.43 (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 minimumvalue should be 0.8 V or less. There
should be no noise in the output wave pattern.
OK
NG
Overhaul the A/T.
L
DReplace the UD clutch. (Code No. 42, 43 or No. 44 is
output, or no other codes are output.)
DReplace the LR brake. (Code No. 46 is output, or no other
codes are output.)
DReplace the RED brake. (Code No. 42, 43 or No. 46 is
output, or no other codes are output.)
DReplace the one-way clutch (OWC-L). (No other codes are
output.)
DReplace the one-way clutch (OWC-D). (Code No. 42 or
No. 43 is output, or no other codes are output.)NG
NG NG


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AUTOMATIC TRANSMISSION -Troubleshooting <A/T>23-34
Code No. 42 2nd without completion of shiftingProbable cause
If the output shaft speed sensor output multiplied by the 2nd gear ratio is not
identical to the input shaft speed sensor output after shifting to 2nd, code No. 42
is output.
If code No. 42 is output 4 times, the transmission is fixed in 3rd and the N
range lampflashes at a rate of 1 Hz.DMalfunction of input shaft speed sensor
DMalfunction of output shaft speed sensor
DMalfunction of harness or connector
DMalfunction of solenoid valve
DMalfunction of reverse clutch retainer
DMalfunction of direct planetary carrier
DMalfunction of 2ND brake system
DMalfunction of UD clutch system
DMalfunction of RED brake system
DMalfunction of one-way clutch system
DMalfunction of engine-A/T-ECU <6G7>
DMalfunction of A/T-ECU<4M4>
DNoise is generated.
LRefer to the Transmission Workshop Manual.
Repair
NO
YES
YES
MUT-
IISelf-Diag Code
DIs code No. 22 output?Code No. 22 Input shaft speed sensor system check
(Refer to P.23-20.)
OK NO
Code No. 23 Output shaft speed sensor system check
(Refer to P.23-22.)MUT-
IIActuator Test
DIs code No. 23 output?
NG
NGMUT-
IIActuator Test
DNo.1 LR solenoid valve
DNo.2 UD solenoid valve
DNo.3 2ND solenoid valve
DNo.4 OD solenoid valve
DNo.5 RED solenoid valve
OK:The sound of operation should be heard.Replace the appropriate solenoid valve.
L
DCheck the harness between the input shaft speed sensor
and the engine-A/T-ECU. <6G7>
DCheck the harness between the input shaft speed sensor
and the A/T-ECU.<4M4>
Replace the input shaft speed sensor.
LNG
Check the trouble symptoms.
Overhaul the A/T.
L
DReplace the reverse clutch retainer.
Check the trouble symptoms.
Eliminate the cause of the noise.To the nextpage
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
<6G7> Voltage between No.81 (D-121) and No.103 (D-122)
<4M4> Voltage between No.31(D-108) and No.43 (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 minimumvalue should be 0.8 V or less. There
should be no noise in the output wave pattern.
OKOK
NG
NG


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AUTOMATIC TRANSMISSION -Troubleshooting <A/T>23-35
NG
Replace the valve body assembly.
L
Check the trouble symptoms.
Replace the engine-A/T-ECU or A/T-ECU.
Check the trouble symptoms.
Repair
OK
NGDCheck 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>
Replace the output shaft speed sensor.
L OK
Check the trouble symptoms.
Overhaul the A/T.
L
DReplace the direct planetary carrier.
Check the trouble symptoms.
Eliminate the cause of the noise.
From the previouspage
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
<6G7> Voltage between No.81 (D-121) and No.104 (D-122)
<4M4> Voltage between No.32(D-108) and No.43 (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 minimumvalue should be 0.8 V or less. There
should be no noise in the output wave pattern.
OK
NG
Overhaul the A/T.
L
DReplace the UD clutch. (Code No. 41, 43 or No. 44 is
output, or no other codes are output.)
DReplace the 2ND brake. (Code No. 44 or No. 45 is output,
or no other codes are output.)
DReplace the RED brake. (Code No. 41, 43 or No. 46 is
output, or no other codes are output.)
DReplace the one-way clutch (OWC-D). (Code No. 41 or
No. 43 is output, or no other codes are output.)NG
NG NG


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AUTOMATIC TRANSMISSION -Troubleshooting <A/T>23-36
Code No.43 3rd without completion of shiftingProbable cause
If the output shaft speed sensor output multiplied by the 3rd gear ratio is not
identical to the input shaft speed sensor output after shifting to 3rd, code No. 43
is output.
If code No. 43 is output 4 times, the transmission is fixed in 3rd and the N
range lampflashes at a rate of 1 Hz.DMalfunction of input shaft speed sensor
DMalfunction of output shaft speed sensor
DMalfunction of harness or connector
DMalfunction of solenoid valve
DMalfunction of reverse clutch retainer
DMalfunction of direct planetary carrier
DMalfunction of UD clutch system
DMalfunction of OD clutch system
DMalfunction of RED brake system
DMalfunction of one-way clutch system
DMalfunction of engine-A/T-ECU <6G7>
DMalfunction of A/T-ECU<4M4>
DNoise is generated.
LRefer to the Transmission Workshop Manual.
Repair
NO
YES
YES
MUT-
IISelf-Diag Code
DIs code No. 22 output?Code No. 22 Input shaft speed sensor system check
(Refer to P.23-20.)
OK NO
Code No. 23 Output shaft speed sensor system check
(Refer to P.23-22.)MUT-
IIActuator Test
DIs code No. 23 output?
NG
NGMUT-
IIActuator Test
DNo.1 LR solenoid valve
DNo.2 UD solenoid valve
DNo.3 2ND solenoid valve
DNo.4 OD solenoid valve
DNo.5 RED solenoid valve
OK:The sound of operation should be heard.Replace the appropriate solenoid valve.
L
DCheck the harness between the input shaft speed sensor
and the engine-A/T-ECU. <6G7>
DCheck the harness between the input shaft speed sensor
and the A/T-ECU.<4M4>
Replace the input shaft speed sensor.
LNG
Check the trouble symptoms.
Overhaul the A/T.
L
DReplace the reverse clutch retainer.
Check the trouble symptoms.
Eliminate the cause of the noise.To the nextpage
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
<6G7> Voltage between No.81 (D-121) and No.103 (D-122)
<4M4> Voltage between No.31(D-108) and No.43 (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 minimumvalue should be 0.8 V or less. There
should be no noise in the output wave pattern.
OKNG
NG OK


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AUTOMATIC TRANSMISSION -Troubleshooting <A/T>23-37
NG
Replace the valve body assembly.
L
Check the trouble symptoms.
Replace the engine-A/T-ECU or A/T-ECU.
Check the trouble symptoms.
Repair
OK
NGDCheck 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>
Replace the output shaft speed sensor.
L OK
Check the trouble symptoms.
Overhaul the A/T.
L
DReplace the direct planetary carrier.
Check the trouble symptoms.
Eliminate the cause of the noise.
To the nextpage
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
<6G7>Voltage between No.81 (D-121) and No.104 (D-122)
<4M4> Voltage between No.32(D-108) and No.43 (D-108)
OK:A wave pattern such as the one shown on P.23-69
(Check Procedure Using an Oscilloscope) should be
output, and with the maximum value should be 4.8 V or
more and the minimumvalue should be 0.8 V or less.
There should be no noise in the output wave pattern.
OK
NG
Overhaul the A/T.
L
DReplace the UD clutch. (Code No. 41, 42 or No. 44 is
output, or no other codes are output.)
DReplace the OD clutch. (Code No. 44 or No. 45 is output,
or no other codes are output.)
DReplace the RED brake. (Code No. 41, 42 or No. 46 is
output, or no other codes are output.)
DReplace the one-way clutch (OWC-D). (Code No. 41 or
No. 42 is output, or no other codes are output.)NG
NG NG


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AUTOMATIC TRANSMISSION -Troubleshooting <A/T>23-38
Code No.44 4th without completion of shiftingProbable cause
If the output shaft speed sensor output multiplied by the 4th gear ratio is not
identical to the input shaft speed sensor output after shifting to 4th, code No. 44
is output.
If code No. 44 is output 4 times, the transmission is fixed in 3rd and the N
range lampflashes at a rate of 1 Hz.DMalfunction of input shaft speed sensor
DMalfunction of output shaft speed sensor
DMalfunction of harness or connector
DMalfunction of solenoid valve
DMalfunction of reverse clutch retainer
DMalfunction of direct planetary carrier
DMalfunction of UD clutch system
DMalfunction of 2ND brake system
DMalfunction of OD clutch system
DMalfunction of DIR clutch system
DMalfunction of engine-A/T-ECU <6G7>
DMalfunction of A/T-ECU<4M4>
DNoise is generated.
LRefer to the Transmission Workshop Manual.
Repair
NO
YES
YES
MUT-
IISelf-Diag Code
DIs code No. 22 output?Code No. 22 Input shaft speed sensor system check
(Refer to P.23-20.)
OK NO
Code No. 23 Output shaft speed sensor system check
(Refer to P.23-22.)MUT-
IIActuator Test
DIs code No. 23 output?
NG
NGMUT-
IIActuator Test
DNo.1 LR solenoid valve
DNo.2 UD solenoid valve
DNo.3 2ND solenoid valve
DNo.4 OD solenoid valve
DNo.5 RED solenoid valve
OK:The sound of operation should be heard.Replace the appropriate solenoid valve.
L
DCheck the harness between the input shaft speed sensor
and the engine-A/T-ECU. <6G7>
DCheck the harness between the input shaft speed sensor
and the A/T-ECU.<4M4>
Replace the input shaft speed sensor.
LNG
Check the trouble symptoms.
Overhaul the A/T.
L
DReplace the reverse clutch retainer.
Check the trouble symptoms.
Eliminate the cause of the noise.To the nextpage
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
<6G7> Voltage between No.81 (D-121) and No.103 (D-122)
<4M4> Voltage between No.31(D-108) and No.43 (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 minimumvalue should be 0.8 V or less. There
should be no noise in the output wave pattern.
OKOK
NG
NG


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AUTOMATIC TRANSMISSION -Troubleshooting <A/T>23-39
NG
Replace the valve body assembly.
L
Check the trouble symptoms.
Replace the engine-A/T-ECU or A/T-ECU.
Check the trouble symptoms.
Repair
OK
NGDCheck 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>
Replace the output shaft speed sensor.
L OK
Check the trouble symptoms.
Overhaul the A/T.
L
DReplace the direct planetary carrier.
Check the trouble symptoms.
Eliminate the cause of the noise.
From the previouspage
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
<6G7> Voltage between No.81 (D-121) and No.104 (D-122)
<4M4> Voltage between No.32(D-108) and No.43 (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 minimumvalue should be 0.8 V or less. There
should be no noise in the output wave pattern.
OK
NG
Overhaul the A/T.
L
DReplace the UD clutch. (Code No. 41, 42 or No. 43 is
output, or no other codes are output.)
DReplace the OD clutch. (Code No. 43 or No. 45 is output,
or no other codes are output.)
DReplace the DIR clutch. (Code No. 45 is output, or no
other codes are output.)NG
NG NG


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