Mitsubishi Montero (2004+). Manual - part 871

AUTOMATIC TRANSMISSION DIAGNOSIS

TSB Revision

AUTOMATIC TRANSMISSION

23A-59

STEP 15. Check A/T control solenoid valve assembly 
connector C-03, PCM connector D-135 and intermediate 
connector E-114 for loose, corroded or damaged 
terminals, or terminals pushed back in the connector.
Q: Are the connectors and terminals in good condition?

YES : Go to Step 16.
NO :  Repair or replace the damaged components. Refer to 

GROUP 00E, Harness Connector Inspection 

P.00E-2

.

AC204395

CONNECTOR : C-03

AE

C-03 (B)

6

10

4

9

5

3

8

2

7

1

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-60

STEP 16. Check the harness for open circuit or damage 
between A/T control solenoid valve connector C-03 
terminal 2 and PCM connector D-135 terminal 96.
Q: Is the harness wire in good condition?

YES : Go to Step 6.
NO :  Repair or replace the harness wire.

AC204395

CONNECTOR : C-03

AE

C-03 (B)

6

10

4

9

5

3

8

2

7

1

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

AUTOMATIC TRANSMISSION DIAGNOSIS

TSB Revision

AUTOMATIC TRANSMISSION

23A-61

STEP 17. Check PCM connector D-135 for loose, corroded 
or damaged terminals, or terminals pushed back in the 
connector.
Q: Are the connector and terminals in good condition?

YES : Go to Step 6.
NO :  Repair or replace the damaged components. Refer to 

GROUP 00E, Harness Connector Inspection 

P.00E-2

.

DTC 16 (P0712): Transmission Fluid Temperature Sensor System (Short Circuit)

.

TRANSMISSION FLUID TEMPERATURE SENSOR 
SYSTEM CIRCUIT
Refer to 

P.23A-44

.

.

CIRCUIT OPERATION
Refer to 

P.23A-44

.

.

DESCRIPTIONS OF MONITOR METHODS
If transmission fluid temperature equals or exceeds 
specified value, PCM judges that transmission fluid 
temperature 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)

• Not applicable

Sensor (The sensor below is determined to be 

normal)

• Not applicable

.

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

AUTOMATIC TRANSMISSION DIAGNOSIS

TSB Revision

AUTOMATIC TRANSMISSION

23A-62

LOGIC FLOW CHARTS (Monitor Sequence)

.

DTC SET CONDITIONS

Check Conditions, Judgement Criteria

• Transmission fluid temperature sensor voltage: 

0.2 volt or less. (1 second)

.

OBD-II DRIVE CYCLE PATTERN
Start the engine, keep the vehicle stopped in P range 
for 5 seconds.

.

TROUBLESHOOTING HINTS (THE MOST LIKELY 
CAUSES FOR THIS CODE TO BE SET ARE:)

• Malfunction of the transmission fluid temperature 

sensor circuit

• Damaged harness, connector

• Malfunction of the PCM

DIAGNOSIS

Required Special Tool:

• MB991958: Scan Tool (MUT-III Sub Assembly)

• MB991824: V.C.I.

• MB991827: MUT-III USB Cable

• MB991911: MUT-III Main Harness B

AC205182

Transmission fluid 
temperature sensor 
voltage > 0.2 V

START

Good

Malfunction

END

Yes

No

Yes

No

Continuous failure 
for 1 sec.