2000 MITSUBISHI MONTERO manual transmission

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 23-13
INSPECTION PROCEDURES CLASSIFIED BY DIAGNOSIS CODE
Code No. 11 Accelerator pedal position sensor (APS)
short-circuit systemProbable cause
If the APS output during idling is 4.8 V or higher, it is judged that there is
excessiveoutput, and code No. 11 is output.DMalfunction of APS
DMalfunction of harness or connector
DMalfunction of engine-A/T-ECU <6G7>
DMalfunction of A/T-ECU<4M4>
DMalfunction of engine-ECU <4M4>
NG
NG
NG
NG Replace
(1)NGNG
Repair
APS single part check
(Refer to GROUP 13 - On-vehicle
Service.)
Check the following connector:D-135
MUT-
IIData List
DNo.11 APS
OK:Refer to P.23-61 (Data List
Chart).
Repair
Check the following connectors:
<6G7> D-120,<4M4> D-112
Repair Repair
Transient malfunction
(Refer to GROUP 00 - Points to
Note for Transient Malfunctions.) OK
Measure at APS connector D-135
DDisconnect the connector and
measure at the harness side.
(1) <6G7> Resistance between
terminal 1 and earth
<4M4>Resistance between
terminal 7 and earth
OK:2
Wor less
(2) <6G7> Voltage between terminal
2 and earth
<4M4> Voltage between terminal
8 and earth
(Ignition switch: ON)
OK:4.8 - 5.2 V
DCheck the harness between the
APS and the engine-A/T-ECU.
<6G7>
DCheck the harness between the
APS and the engine-ECU. <4M4>
OK
OK
Replace the engine-A/T-ECU or
engine-ECU.
(2)NG
OK
OKCheck the following connectors:
<6G7> D-121,<4M4>D-108
Check the trouble symptoms.OK
APS adjustment
(Refer to GROUP 13 - On-vehicle
Service.)
Check the following connectors:
<6G7> D-121,<4M4>D-108 NG
OK
Replace the engine-A/T-ECU or
A/T-ECU. OK OK OKNG
NGRepair Repair
DCheck the harness between the
APS and the engine-A/T-ECU,
and repair if necessary. <6G7>
DCheck the harness between the
APS and the engine-ECU, and
repair if necessary.<4M4> NG NG
NGCheck the trouble symptoms.
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
95 and earth
D<4M4> Voltage between terminal
45 and earth
OK:Fully close the accelerator
985 - 1,085 mV
fullyopen the accelerator
4,000 mV or more
DCheck the harness between the
APS and the engine-A/T-ECU,
and repair if necessary. <6G7>
DCheck the harness between the
APS and the A/T-ECU, and
repair if necessary. <6G7>
NG
Check the following connectors:
<6G7> D-120,<4M4> D-112


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AUTOMATIC TRANSMISSION -Troubleshooting 23-14
Code No. 12 Accelerator pedal position sensor (APS)
open circuit systemProbable cause
When the APS output is 0.2 V or less while theengine is idling, it is judged that
output is too low and code No. 12 is output.DMalfunction of APS
DMalfunction of harness or connector
DMalfunction of engine-A/T-ECU <6G7>
DMalfunction of A/T-ECU<4M4>
DMalfunction of engine-ECU <4M4>
NG
NG
NG Replace
NG
NG
Repair
APS single part check (Refer to
GROUP 13 - On-vehicle Service.)
Check the following connectors:
D-135
MUT-
IIData List
DNo.11 APS
OK:Refer to P.23-61 (Data List
Chart).
RepairTransient malfunction
(Refer to GROUP 00 - Points to
Note for Transient Malfunctions.) OK
Measure at APS connector D-135
DDisconnect the connector and
measure at the harness side.
D<6G7>Voltage between terminal
2 and earth
D<4M4>Voltage between terminal
8 and earth
OK:4.8 - 5.2 V
DCheck the harness between the
APS and the engine-A/T-ECU,
and repair if necessary. <6G7>
DCheck the harness between the
APS and the engine-ECU, and
repair if necessary.<4M4> OK
Check the following connectors:
<6G7> D-120,<4M4> D-112
OK
Measure at APS connector D-135.
DUse the test harness
(MB991658) to connect only
terminals 1, 2 and 3 <6G7>, or
only terminals 6, 7 and 8 <4M4>,
and then measure at the pickup
harness.
DIgnition switch: ON
(1) <6G7> Voltage between terminal
2 and earth
<4M4> Voltage between terminal
8 and earth
OK:4.8 - 5.2 V
(2) <6G7> Voltage between terminal
3 and earth
<4M4> Voltage between terminal
6 and earth
OK:Fully close the accelerator
985 - 1,085 mV
fullyopen the accelerator
4,000 mV or more
(1)NGCheck the following connectors:
<6G7> D-120,<4M4> D-112 OK OK NG
Repair
Measure at engine-A/T-ECU
connector D-120 <6G7>, or at
engine-ECU connector D-112 <4M4>.
DMeasure at the ECU terminals
DIgnition switch: ON
D<6G7> Voltage between terminal
46 and earth
D<4M4> Voltage between terminal
60 and earth
OK:4.8 - 5.2 VOK
Repair
RepairCheck the following connectors:
<6G7> D-120,<4M4> D-112
NG
Check the trouble symptoms.OKReplace the engine-A/T-ECU or
engine-ECU.
OK
APS adjustment (Refer to GROUP
13 - On-vehicle Service.)
Check the following connectors:
<6G7> D-121,<4M4>D-108OK (2)NG
OK
Repair OK
NG
NG NG
NG
To the nextpage
DCheck the harness between the
APS and the engine-A/T-ECU.
<6G7>
DCheck the harness between the
APS and the engine-ECU. <4M4>
DCheck the harness between the
APS and the engine-A/T-ECU,
and repair if necessary. <6G7>
DCheck the harness between the
APS and the engine-ECU, and
repair if necessary.<4M4>
DCheck the harness between the
APS and the engine-A/T-ECU,
and repair if necessary. <6G7>
DCheck the harness between the
APS and the engine-ECU, and
repair if necessary.<4M4>


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AUTOMATIC TRANSMISSION -Troubleshooting AUTOMATIC TRANSMISSION -Troubleshooting AUTOMATIC TRANSMISSION -Troubleshooting 23-15
OK
OK
From the previouspage
OK
Replace the engine-A/T-ECU or
A/T-ECU. 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
95 and earth
D<4M4> Voltage between terminal
45 and earth
OK:Fully close the accelerator
985 - 1,085 mV
fullyopen the accelerator
4,000 mV or moreNG
NG
NG
Repair
Check the following connectors:
<6G7> D-121,<4M4>D-108
NG
Repair
Check the trouble symptoms.
Check the following connectors:
<6G7> D-121,<4M4>D-108
DCheck the harness between the
APS and the engine-A/T-ECU,
and repair if necessary. <6G7>
DCheck the harness between the
APS and the A/T-ECU, and
repair if necessary.<4M4>
Code No. 14 Accelerator pedal position sensor (APS)
incorrect adjustment systemProbable cause
If the APS output is 0.2 V or less or 1.2 V or higher while theengine is idling,
it is judged that the APS isincorrectly adjusted, and code No. 14 is output.DMalfunction of APS
DMalfunction of harness or connector
DMalfunction of engine-A/T-ECU <6G7>
DMalfunction of A/T-ECU<4M4>
DMalfunction of engine-ECU <4M4>
NGNO
YES
YES
MUT-
IISelf-Diag Code
DIs code No. 11 output?Code No. 11 Acceleratorpedal
position sensor (APS) short-circuit
system check (Refer to P.23-13.)
Code No. 12 Acceleratorpedal
position sensor (APS) short-circuit
system check (Refer to P.23-14.)
MUT-
IIData List
DNo.11 APS
OK:Refer to P.23-61 (Data List
Chart).
NG
ReplaceAPS single part check
(Refer to GROUP 13 - On-vehicle
Service.)
OK
NG
Repair
OK
Check the following connector:
D-135OK NO
Transient malfunction
(Refer to GROUP 00 - Points to
Note for Transient Malfunctions.)
MUT-
IISelf-Diag Code
DIs code No. 12 output?
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AUTOMATIC TRANSMISSION -Troubleshooting 23-16
NG
OK
Check the following connectors:
<6G7> D-120,<4M4> D-112
Repair
NG
Repair
NG
Repair
OK
OK
Check the following connectors:
<6G7> D-120,<4M4> D-112
engine-A/T-ECU connector D-120
<6G7>
Measure at engine-ECU connector
D-112 <4M4>
DMeasure at the ECU terminals
DIgnition switch: ON
D<6G7> Voltage between terminal
46 and earth
D<4M4> Voltage between terminal
6 and earth
OK:4.8 - 5.2 V
NGNG
NGCheck the trouble symptoms.Replace the engine-A/T-ECU or
engine-ECU.
OK
Measure at APS connector D-135
DDisconnect the connector and
measure at the harness side.
D<6G7>Voltage between terminals
2 and earth
D<4M4>Voltage between terminals
8 and earth
(Ignition switch: ON)
OK:4.8 - 5.2 VOK
DCheck the harness between the
APS and the engine-A/T-ECU,
and repair if necessary. <6G7>
DCheck the harness between the
APS and the engine-ECU, and
repair if necessary.<4M4>
DCheck the harness between the
APS and the engine-A/T-ECU.
<6G7>
DCheck the harness between the
APS and the engine-ECU. <4M4>
From the previouspage
OK
NG
NG
(1)NGCheck the following connectors:
<6G7> D-120,<4M4> D-112
(2)NG
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
95 and earth
D<4M4> Voltage between terminal
45 and earth
OK:Fully close the accelerator
985 - 1,085 mV
fullyopen the accelerator
4,000 mV or more
OKCheck the following connectors:
<6G7> C-121,<4M4>C-108
Check the trouble symptoms.OK
Check the following connectors:
<6G7> D-121,<4M4>D-108 NGOK
Replace the engine-A/T-ECU or
A/T-ECU. OK
NG
(3)NG
OK
APS adjustment
(Refer to GROUP 13 - On-vehicle
Service.)
NG
Check the following connectors:
<6G7> D-121,<4M4>D-108
DCheck the harness between the
APS and the engine-A/T-ECU,
and repair if necessary. <6G7>
DCheck the harness between the
APS and the engine-ECU, and
repair if necessary.<4M4>
DCheck the harness between the
APS and the engine-A/T-ECU,
and repair if necessary. <6G7>
DCheck the harness between the
APS and the A/T-ECU, and
repair if necessary.<4M4>
DCheck the harness between the
APS and the engine-A/T-ECU,
and repair if necessary. <6G7>
DCheck the harness between the
APS and the A/T-ECU, and
repair if necessary.<4M4> NG
Measure at APS connector D-135.
DUse the test harness
(MB991658) to connect only
terminals 1, 2 and 3 <6G7>, or
only terminals 6, 7 and 8 <4M4>,
and then measure at the pickup
harness.
DIgnition switch: ON
(1) <6G7> Voltage between terminal
1 and earth
<4M4> Voltage between terminal
7 and earth
OK:0.5 V or less
(2) <6G7> Voltage between terminal
2 and earth
<4M4> Voltage between terminal
8 and earth
(Ignition switch: ON)
OK:4.8 - 5.2 V
(3) <6G7> Voltage between terminal
3 and earth
<4M4> Voltage between terminal
6 and earth
OK:Fully close the accelerator
985 - 1,085 mV
fullyopen the accelerator
4,000 mV or moreRepair
Repair
RepairOK
Repair


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AUTOMATIC TRANSMISSION -Troubleshooting 23-17
Code No. 15 A/T fluid temperature sensor systemProbable cause
If the A/T fluid temperature sensor output is 4.5 V or higher even after driving
for 10 minutes or more (fluid temperature does not rise), it isjudged that there
is an opencircuit in the A/T fluid temperature sensor and code No. 15 is output.DMalfunction of A/T fluid temperature sensor
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
Transient malfunction (Refer to GROUP 00 - Points to Note
for Transient Malfunctions.)
Check the following connectors:<6G7> D-121,<4M4>D-108
OK
Check the trouble symptoms.
Replace the engine-A/T-ECU or A/T-ECU.
OKRepair NG
NG
To the nextpage
OK
NG
NG
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
NG OK
Check the following connectors:<6G7> D-122,<4M4>D-108
Check the trouble symptoms.
Replace the engine-A/T-ECU or A/T-ECU.
OK
NGReplace the A/T fluid temperature sensor.
L
Measure at engine-A/T-ECU connector D-122 <6G7>, or at
A/T-ECU connector D-108 <4M4>.
DMeasure at the ECU terminals
DIgnition switch: ON
D<6G7> Voltage between terminal 124 and earth
D<4M4> Voltage between terminal 44 and earth
OK:A/T fluid temperature
3.8 - 4.0 V at 20
_C
3.2 - 3.4 V at 40
_C
1.7 - 1.9 V at 80
_COK
MUT-
IIData List
DNo.15 A/T fluid temperature sensor
OK:When the engine iscold, the temperature is about
the same as the atmospheric temperature (air tem-
perature).
When the engine is hot, the temperature is 70 -
80
_C.
NG
Repair
NG
Revision
Measure at solenoid valve assembly connector C-04.
DDisconnect the connector and measure at the sensor side.
DResistance between terminals 1 and 2
OK:A/T fluid temperature
16.7 - 20.5 k
Wat 0
_C
7.3 - 8.9 k
Wat 20
_C
3.4 - 4.2 k
Wat 40
_C
1.9 - 2.2 k
Wat 60
_C
1.0 - 1.2 k
Wat 80
_C
0.57 - 0.69 k
Wat 100
_C
Check the following connectors:<6G7> C-04, D-122,
D-121,<4M4> D-108, C-04


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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).
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