Mitsubishi Montero (2004+). Manual - part 867

AUTOMATIC TRANSMISSION DIAGNOSIS

TSB Revision

AUTOMATIC TRANSMISSION

23A-43

Malfunction when shifting

Shift shocks and slipping

9

P.23A-322

Does not shift properly

Early or late shifting in all gears

10

P.23A-325

Early or late shifting in some gears

11

P.23A-328

Does not shift

No diagnostic trouble codes

12

P.23A-330

Malfunction while driving

Poor acceleration

13

P.23A-335

Vibration

14

P.23A-336

Vehicle shifts differently with A/C engaged

15

P.23A-339

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

16

P.23A-353

Shift switch assembly system

17

P.23A-355

4LLc detection switch assembly system

18

P.23A-374

SYMPTOM

INSPECTION 
PROCEDURE 
NO.

REFERENCE 
PAGE

AUTOMATIC TRANSMISSION DIAGNOSIS

TSB Revision

AUTOMATIC TRANSMISSION

23A-44

DIAGNOSTIC TROUBLE CODE PROCEDURES <A/T>

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

AC205187AC

Transmission Fluid Temperature Sensor System Circuit

AC204395

CONNECTOR : C-03

AE

C-03 (B)

6

10

4

9

5

3

8

2

7

1

AUTOMATIC TRANSMISSION DIAGNOSIS

TSB Revision

AUTOMATIC TRANSMISSION

23A-45

.

CIRCUIT OPERATION

• The PCM (terminal 119) 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 96).

• 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

.

AC204681AB

CONNECTOR: D-135

D-135 (GR)

91 92

93

101

94 95

96 97 98 99 100

102103

104

105106

107108 109

110 111112

113114

115116 117

118 119120

AC204176

CONNECTOR : E-114

BD

38

28

16

33

22

10

31

19

7

1

18

30

29

17

5

6

21

20

32

8

2

9

25

13

3

24

23

3435

1112

27

26

3637

14

4

15

AUTOMATIC TRANSMISSION DIAGNOSIS

TSB Revision

AUTOMATIC TRANSMISSION

23A-46

LOGIC FLOW CHARTS (Monitor Sequence)

.

DTC SET CONDITIONS

Check Conditions

• Engine speed: 1,000 r/min or more.

• Output speed: 1,000 r/min or more.

• Accumulated time in above condition: 10 min-

utes.

Judgement Criteria

• Transmission fluid temperature sensor voltage: 

4.5 volts or more. (1 second)

.

OBD-II DRIVE CYCLE PATTERN
Start the engine, drive at 60 km/h (37 mph) or more 
for 15 minutes in total.

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