Mitsubishi Montero Sport (2004+). Manual — part 619

AUTOMATIC TRANSMISSION DIAGNOSIS

TSB Revision

AUTOMATIC TRANSMISSION

23A-41

SYMPTOM CHART <AUTOMATIC TRANSMISSION>

M1231108800117

SYMPTOM

INSPECTION
PROCEDURE
NO.

REFERENCE PAGE

Communication with
scan tool (MUT-II) is
not possible

Communication with all systems is
impossible

−

Group 13A, Symptom
Procedures

P.13A-716

Communication with the PCM only is
impossible

−

Group 13A, Symptom
Procedures

P.13A-719

Driving impossible

Engine does not crank

1

P.23A-343

Does not move forward

2

P.23A-345

Does not move backward

3

P.23A-348

Does not move (forward or backward)

4

P.23A-350

Malfunction when
moving selector into
gear

Engine stalls when moving selector lever
from "N" to "D" or "N" to "R"

5

P.23A-352

Shift shock when shifting from "N" to "D"
and long delay

6

P.23A-353

Shift shock when shifting from "N" to "R"
and long delay

7

P.23A-357

Shift shock when shifting from "N" to "D",
"N" to "R" and long delay

8

P.23A-360

Malfunction when
shifting

Shift shocks and slipping

9

P.23A-362

Does not shift
properly

Early or late shifting in all gears

10

P.23A-364

Early or late shifting in some gears

11

P.23A-367

Does not shift

No diagnostic trouble codes

12

P.23A-369

Malfunction while
driving

Poor acceleration

13

P.23A-372

Vibration

14

P.23A-374

Vehicle shifts differently with A/C engaged

15

P.23A-376

Transmission won't downshift under load with auto-cruise engaged 16

P.23A-388

Transfer low detection switch system <V4A51>

17

P.23A-398

AUTOMATIC TRANSMISSION DIAGNOSIS

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AUTOMATIC TRANSMISSION

23A-42

DIAGNOSTIC TROUBLE CODE PROCEDURES

DTC 15 (P0713): Transmission Fluid Temperature Sensor System (Open Circuit)

AC103398

A/T Fluid Temperature Sensor System Circuit

AD

Transmission Fluid Temperature Sensor System Circuit

AC202314

6

10

4

9

5

3

8

2

7

1

CONNECTOR: B-02

TRANSMISSION
CONTROL CABLE

B-02 (B)

AB

AUTOMATIC TRANSMISSION DIAGNOSIS

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AUTOMATIC TRANSMISSION

23A-43

.

CIRCUIT OPERATION

• The PCM (terminal 124) applies 5 volts to the

transmission fluid temperature sensor output ter-
minal (terminal 1).

• The transmission fluid temperature sensor circuit

is grounded to the PCM (terminal 57).

• When the transmission fluid temperature is cold,

the transmission fluid temperature sensor resis-
tance is high. When the transmission fluid tem-
perature is hot, the transmission fluid
temperature sensor resistance is low.

.

DESCRIPTIONS OF MONITOR METHODS
If transmission fluid temperature is below specified
value even after driving test for more than specified
period, PCM judges that transmission fluid tempera-
ture sensor has a failure.

.

MONITOR EXECUTION
Continuous

.

MONITOR EXECUTION CONDITIONS (Other
monitor and Sensor)

Other Monitor (There is no temporary DTC stored

in memory for the item monitored below)

• DTC 23 (P0720): Output shaft speed sensor mal-

function

Sensor (The sensor below is determined to be

normal)

• Output shaft speed sensor

.

AC202315

9 10

8

6 7

31 32

30

29

21

20

19

18

5

4

2

1

3

27

26

24

23

25

16

15

14

13

12

28

17

33

22

11

22

9 10

20

19

6 7 8

21

17

1516

5

14

1213

3

2

4

18

11

1

AB

CONNECTORS: C-71, C-96

C-71

C-96

C-71

C-96

AC202316

PCM

60

46

26

57

45

44

64

55 56

65

62 63

52 53

5051

61

42

59

48

41
47
58

43
49

54

120

107

119

106

129 130

118

105

117

114115116

126127128

104

111

103

112

108

101102

109110

121122123

124

113

125

CONNECTORS: C-90, C-92

AB

C-90

C-92

C-90 (GR)

C-92 (GR)

AUTOMATIC TRANSMISSION DIAGNOSIS

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AUTOMATIC TRANSMISSION

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LOGIC FLOW CHARTS (Monitor Sequence)

.

Good

Malfunction

Timer start

N

E

:

Engine speed

N

OPG-B

: Output speed (output

shaft speed sensor)

Timer hold

Timer accumulate

START

N

E

> 1,000 r/min and

N

OPG-B

> 1,000 r/min

Continuous failure
for 1 sec.

Transmission fluid
temperature sensor
voltage > 4.5 V

Timer > 10 min.

END

N

E

> 1,000 r/min and

N

OPG-B

> 1,000 r/min

AC205204

Yes

No

Yes

No

Yes

No

Yes

No

Yes

No