2000 MITSUBISHI MONTERO Service Repair Manual

AUTOMATIC TRANSMISSION -Troublehshooting II>23-76
(2)NG
(3)NG
From the previouspage
(1)NG
OK
NG
Measure at front propeller shaft speed sensor connector C-17.
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 front propeller 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.
Check the harness between the front propeller shaft speed
sensor and the transfer-ECU, and repair if necessary. (Earth
line)
Replace the front propeller shaft speed sensorOK
OK
Repair
Check the harness between the front propeller shaft speed
sensor and the transfer-ECU, and repair if necessary. (Sensor
line)
Eliminate the cause of the noise.
NG
Check the trouble symptoms.
NG
Repair
OK
NG
Repair
OK
DCheck the harness between the front propeller shaft speed
sensor and the transfer-ECU.
DCheck the harness between the front propeller shaft speed
sensor and the ignition switch.
Check the following connectors:D-208, D-213, D-32, E-115,
E-105


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AUTOMATIC TRANSMISSION -Troublehshooting II>23-77
Code No. 24, 25 Rear propeller shaft speed sensor systemProbable cause
Code No. 24 is output to indicate anopencircuit or short-circuit in the rear
propeller shaft speed sensor if the signal input from the rear propeller shaft
speed sensor is unstable when the APS voltage is 1.5 V or higher.
Code No. 25 is output to indicate anopencircuit or short-circuit in the rear
propeller shaft speed sensor if the signal input from the rear propeller shaft
speed sensor is unstable when the freewheelengageswitch is on.DNo. 3 Rear propeller shaft speed sensor
DMalfunction of harness or connector
DMalfunction of transfer-ECU
Transient malfunction (Refer to GROUP 00 - Points to Note
for Transient Malfunctions.)
OK NG
Check the following connector:E-105
OK
OK
To the nextpage
NG
OK
NG
NG
Repair
Check the following connector:C-08
Replace the transfer-ECU.
OKMUT-
IIData List
DNo. 3 Rear propeller shaft speed sensor
OK:Refer to P.23-87 (Data List Chart).
OK
OK
NG
Check the trouble symptoms.
OK
Measure at transfer-ECU connector E-105
DMeasure at ECU terminals.
DIgnition switch: ON
DVoltage between terminals 18 and earth
OK:0.5 V or less
NG
Repair
Replace the transfer-ECU.
NG
Check the trouble symptoms.
Check the trouble symptoms.
Replace the transfer-ECU.
OK
OK
Measure at transfer-ECU connector E-105
DMeasure at ECU terminals.
DDisconnect rear propeller shaft speed sensor connector
C-08.
DIgnition switch: ON
DVoltage between terminals 9 and earth
OK:4.8 - 5.2 V
Measure the rear propeller shaft speed sensor output wave
pattern at transfer-ECU connector E-105 (using an
oscilloscope).
DVehicle speed: approx. 50 km/h
DShift range: 3rd
DVoltage between terminals 9 - 18
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.
NG
RepairCheck the following connectors:C-08, E-108NG
NG
Repair
Check the following connector:E-108Repair
NG
Check the harness between the rear propeller shaft speed
sensor and the transfer-ECU.


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AUTOMATIC TRANSMISSION -Troublehshooting II>23-78
(2)NG
(3)NG
From the previouspage
(1)NG
OK
NG
Measure at rear propeller shaft speed sensor connector C-08.
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 rear propeller 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.
Check the harness between the rear propeller shaft speed
sensor and the transfer-ECU, and repair if necessary. (Earth
line)
Replace the rear propeller shaft speed sensorOK
OK
Repair
Check the harness between the rear propeller shaft speed
sensor and the transfer-ECU, and repair if necessary. (Sensor
line)
Eliminate the cause of the noise.
NG
Check the trouble symptoms.
NG
Repair
OK
NG
Repair
OK
DCheck the harness between the rear propeller shaft speed
sensor and the transfer-ECU.
DCheck the harness between the rear propeller shaft speed
sensor and the ignition switch.
Check the following connectors:D-208, D-213, D-32, E-115,
E-105


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AUTOMATIC TRANSMISSION -Troublehshooting II>23-79
Code No. 26 Stop lamp switch systemProbable cause
Code No. 26 is output to indicate a short-circuit in the stoplampswitch when
the stoplampswitch is continuously on for 15 minutes or more when the vehicle
speed is 15 km/h or higher.DMalfunction of brakepedal
DMalfunction of stoplampswitch
DMalfunction of harness or connector
DMalfunction of transfer-ECU
NG
NG
NG
MUT-
IIData List
DNo. 23 Stoplampswitch system
OK:ON when brakepedal is depressed
OFF when the brakepedal is releasedTransient malfunction
(Refer to GROUP 00 - Points to Note for Transient
Malfunctions.) OK
OK OK OK NG
DCheck the harness between the stoplampswitch and the
transfer-ECU, and repair if necessary.
DCheck the harness between the stoplampswitch and the
battery, and repair if necessary.Repair
Check the harness between the stoplampswitch and the
battery, and repair if necessary.
OK OK
Brakepedal heightcheck
(Refer to GROUP 35 - Brake Pedal.)
OKNG
Adjust
OK
OK
NG
NG
Check the trouble symptoms.Replace the transfer-ECU.
Measure at transfer-ECU connector E-108
DMeasure at ECU terminals.
DVoltage between terminals 34 and earth
OK:System voltage when brakepedal is depressed
1 V or less when brakepedal 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 35 - Brake Pedal.)
Check the following connector:D-136
Repair NG
Check the following connector:E-108Repair
Check the following connectors: D-27,
D-26, D-33, E-105, E-108, D-124, E-115,
E-108, D-27
Check the following connectors: D-27,
D-26, D-27, D-124


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AUTOMATIC TRANSMISSION -Troublehshooting II>23-80
Code No. 31 Transfer lever switch systemProbable cause
Code No. 31 is output to indicate anopencircuit or short-circuit in the transfer
lever switch if the input signal from the transfer lever switch is unstable.DMalfunction of transfer lever switch
DMalfunction of harness or connector
DMalfunction of transfer-ECU
NG
NG
MUT-
IIData List
DNo. 6 Transfer lever position
OK:Refer to P.23-87 (Data List Chart).Transient malfunction
(Refer to GROUP 00 - Points to Note for Transient
Malfunctions.) OK
OK OKOKNG
DCheck the harness between the transfer lever switch and
the transfer-ECU, and repair if necessary.
DCheck the harness between the transfer lever switch and
the ignition switch, and repair if necessary.Repair
Check the harness between the transfer lever switch and the
ignition switch, and repair if necessary.
OK OK
NG
OK
OK
NG
NG
Check the trouble symptoms.Replace the transfer-ECU.
Measure at transfer-ECU connector E-105
DMeasure at ECU terminals.
DIgnition switch: ON
(1) Transfer lever position: 2H> Voltage between terminal 20
and earth
(2) Transfer lever position: 4H> Voltage between terminal 21
and earth
(3) Transfer lever position: 4H> Voltage between terminal 22
and earth
(4) Transfer lever position: 4H> Voltage between terminal 23
and earth
OK:System voltage
Measure at transfer lever switch connector E-19.
DDisconnect the connector and measure at the harness
side.
DIgnition switch: ON
DVoltage between terminal (1) and earth
OK:System voltageNG
Replace
NG
Repair
Transfer lever switch check (Refer to P.23-117.)
Check the following connector:E-19
Repair NG
Check the following connector:E-105Repair
Check the following connectors:D-208, D-213, D-32, E-115,
E-105
Check the following connectors:D-208, D-213, D-32, E-115


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AUTOMATIC TRANSMISSION -Troublehshooting II>23-81
Code No. 32, 33 Transfer position switch systemProbable cause
Code No. 32 is output to indicate anopencircuit or short-circuit in a transfer
position switch, a malfunction of the shift actuator or a malfunction of the
transfer shift mechanism when transfer selection does not complete while driving.
Code No. 33 is output to indicate anopencircuit or short-circuit in a transfer
position switch if the input signal from the transfer position switch is unstable.DMalfunction of transfer position switch
DMalfunction of harness or connector
DMalfunction of transfer-ECU
DMalfunction of shift actuator
DMalfunction of transfer shift mechanism
LRefer to the Transmission Workshop Manual.
OK
Transient malfunction (Refer to GROUP 00 - Points to Note
for Transient Malfunctions.)
OKNG
Check the harnesses between the transfer position switches
and the transfer-ECU, and repair if necessary.OKNG
OK
OK
NG
Replace the transfer-ECU. NG
ReplaceTransfer lever switch check (Refer to P.23-117.)
Repair NG
Repair
Check the trouble symptoms.
NG OK
Replace the shift actuator.
L
MUT-
IIData List
DNo. 7 Transfer position
OK:Refer to P.23-87 (Data List Chart).
NG
Actuator test
(Only No.32)
DNo. 2, No. 3 Shift actuator
OKRefer to P.23-89 (Actuator Test).
Measure at transfer-ECU connector E-108
DMeasure at ECU terminals.
DIgnition switch: ON
DVoltage between terminals 43, 44, 45, 46, 47 and earth
OK:System voltage
Check the following connectors:C-06, C-07, C-14, C-15, C-16
Check the following connector:E-108


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AUTOMATIC TRANSMISSION -Troublehshooting II>23-82
Code No. 34 Freewheel engage solenoid valve systemProbable cause
Code No. 34 is output to indicate anopencircuit or short-circuit in the freewheel
engage solenoidvalve when the transfer-ECU terminal voltages are not the
same while current isbeing supplied to the freewheel engage solenoidvalve.DMalfunction of freewheel engage solenoidvalve
DMalfunction of harness or connector
DMalfunction of transfer-ECU
NG
NG
MUT-
IIActuator Test
DNo. 1 Freewheel engage solenoidvalve
OK:The solenoid valve operates for 5 seconds.Transient malfunction (Refer to GROUP 00 - Points to Note
for Transient Malfunctions.) OK
OK OK OKNG
DCheck the harness between the freewheelengage solenoid
valve and the transfer-ECU, and repair if necessary.
DCheck the harness between the freewheelengage solenoid
valve and the ignition switch, and repair if necessary.Repair
Check the harness between the freewheelengage solenoid
valve and the ignition switch, and repair if necessary.
OK OK
OK
NG
Check the trouble symptoms.Replace the transfer-ECU.
Measure at transfer-ECU connector E-108
DMeasure at ECU terminals.
DTransfer: 4WD
DIgnition switch: ON
DVoltage between terminals 41 and earth
OK:System voltage
Measure at freewheel engage solenoidvalve connectors A-40
and A-41.
DDisconnect the connector and measure at the harness
side.
DIgnition switch: ON
DVoltage between terminal 1 and earth
OK:System voltageNG
Replace
NG
Repair
Freewheel engage solenoidvalve check
(Refer to GROUP 26 - On-Vehicle Service.)
Check the following connectors:A-40, A-41
Repair NG
Check the following connector:E-108
NG
Repair
OK
Check the following connectors: D-208,
D-210, D-27, A-15, A-16, A-04, E-113, E-108,
D-208, D-210, D-27, A-15, A-16, D-143, E-113, E-108,
Check the following connectors:D-208, D-210, D-27, A-15


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AUTOMATIC TRANSMISSION -Troublehshooting II>23-83
Code No. 35 Freewheel engage switch systemProbable cause
Code No. 35 is output to indicate anopencircuit or short-circuit in the freewheel
engageswitch when the freewheelengageswitch condition does not correspond
to the fact that current isbeing supplied to the freewheel engage solenoidvalve.DMalfunction of freewheel engageswitch
DMalfunction of harness or connector
DMalfunction of transfer-ECU
NG
(1)NG
MUT-
IIData List
DNo. 38 Freewheel engageswitch
OK:Refer to P.23-87 (Data List Chart).Transient malfunction (Refer to GROUP 00 - Points to Note
for Transient Malfunctions.) OK
OK OK OKNG
Repair
Check the following connector:B-40
Check the harness between the freewheelengageswitch and
earth, and repair if necessary.
OK
OK
Check the trouble symptoms.Replace the transfer-ECU.
Measure at freewheel engageswitch connector B-54.
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:System voltageNG
Replace
NG
Repair
Freewheel engageswitch check (Refer to GROUP 26 -
Freewheel Clutch.)
Check the following connector:B-54
MUT-
IISelf-Diag Code
DIs code No. 34 output?Code No. 34 Freewheelengage solenoidvalve system check
(Refer to P.23-82.) YES
NO
NG
(2)NG
NG
OK
Repair
Check the following connectors:E-108, E-113, B-40
Check the harness between the freewheelengageswitch and
the transfer-ECU, and repair if necessary.
Check the following connector:B-54Repair
NG


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