2000 MITSUBISHI MONTERO relay

AUTOMATIC TRANSMISSION -Troubleshooting AUTOMATIC TRANSMISSION -Troubleshooting 23-5
ROAD TEST
No.Pre-test/opera-
tion conditionsTest/operationJudgment valueCheck itemDiag-
nosis
code
No.Inspection pro-
cedure if there is
an abnormality
1Ignition switch:
OFFIgnition switch
(1) ONData List No. 54
(1) 10 - 12 VA/T control
relay54A/T control relay
system
2Ignition switch:
ON
Engine:Stop
Selector lever
position: PSelector lever posi-
tion
(1) P
(2) R
(3) N
(4) DData List No. 61
(1) P
(2) R
(3) N
(4) DInhibitor
switch-Inhibitor switch
system
Selector lever opera-
tion
(1) D (1st)
(2) Sports mode se-
lected (1st)
(3) Lever moved toData List
No.67 No.68 No.69
(1)OFF OFF OFF
(2)ON OFF OFF
(3)ON ON OFF
(4)ON OFF ON
Select switch
Upshift
switch
Downshift
switch-Sports mode
switch system
upshift position
and held (2nd)
(4) Lever moved to
downshift
position and held
(1st)Shift indicator lamp
(1) D and 1
illuminate
(2) Only 1
illuminates
(3) Only 2
illuminates
(4) Only 1
illuminates
Accelerator pedal
(1) Fully closed
(2) Depressed
(3) Fully openedData List No. 11
(1) 985 - 1,085 mV
(2) Gradually in-
creases from (1)
(3) 4,000 mV or
moreAPS11
12
14APS system
Data list No.25
(1) OFF
(2) ONWide open
throttle
switch25Wide open
throttle switch
system
2Ignition switch:
ON
Engine: StopBrake pedal
(1) Depressed
(2) ReleasedData List No. 26
(1) ON
(2) OFFStop lamp
switch26Stop lamp
switch system
Selector lever
position: PTransfer shift lever
position
(1) Except for 4LLc
(2) 4LLcData List No. 75
(1) OFF
(2) ON4LLc switch-4LLc switch sys-
tem


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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 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 23-26
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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AUTOMATIC TRANSMISSION -Troubleshooting 23-27
Code No. 32 UD solenoid valve systemProbable cause
If the drive terminal voltage of the UD solenoid valve is 3.0 V or less, it is
judged that there is ashort-circuit oropencircuit in the UD 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 UD 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.2 UD 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
Measure at solenoid valve assembly connector C-04.
DDisconnect the connector and measure at the harness
side.
DIgnition switch: ON
DVoltage between terminals 9 and earth
OK:System voltage
Replace the UD 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 3 and 9
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 120 and earth
D<4M4> Voltage between terminal 1 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


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AUTOMATIC TRANSMISSION -Troubleshooting 23-28
Code No. 33 2nd solenoid valve systemProbable cause
If the drive terminal voltage of the 2nd solenoid valve is 3.0 V or less, it is
judged that there is ashort-circuit oropencircuit in the 2nd 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 2nd 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. 3 2nd 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
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 2nd 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 4 and 9
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 106 and earth
D<4M4> Voltage between terminal 16 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
NG
Measure at solenoid valve assembly connector C-04.
DDisconnect the connector and measure at the harness
side.
DIgnition switch: ON
DVoltage between terminals 9 and earth
OK:System voltage


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AUTOMATIC TRANSMISSION -Troubleshooting 23-29
Code No. 34 OD solenoid valve systemProbable cause
If the drive terminal voltage of the OD solenoid valve is 3.0 V or less, it is
judged that there is ashort-circuit oropencircuit in the OD 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 OD 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.4 OD 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 OD 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 5 and 9
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 130 and earth
D<4M4> Voltage between terminal 14 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 terminals 9 and earth
OK:System voltage


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AUTOMATIC TRANSMISSION -Troubleshooting 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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