Mitsubishi Montero (2004+). Manual - part 900

AUTOMATIC TRANSMISSION DIAGNOSIS

TSB Revision

AUTOMATIC TRANSMISSION

23A-175

STEP 5. Check the harness for open circuit or short circuit 
to ground between combination meter connector D-03 
terminal 65 and PCM connector D-134 terminal 79.
Q: Is the harness wire in good condition?

YES : Go to Step 7.
NO :  Repair or replace the harness wire.

AC204170

CONNECTOR : D-03

CE

D-03 (GR)

58

57

67

66

56

54 55

64

59

53

52

62

61

63

65

60

51

AC204681AC

CONNECTOR: D-134

D-134 (GR)

61 62

63 64

65 66 67 68 69 70 71 72 73

82

89

81

88

80

79

78

77

87

86

85

76

75

74

84

83

AUTOMATIC TRANSMISSION DIAGNOSIS

TSB Revision

AUTOMATIC TRANSMISSION

23A-176

STEP 6. Check PCM connector D-134 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 7.
NO :  Repair or replace the damaged components. Refer to 

GROUP 00E, Harness Connector Inspection 

P.00E-2

.

STEP 7. Using scan tool MB991958, check data list item 29: 
Vehicle Speed Sensor.

CAUTION

To prevent damage to scan tool MB991958, always turn the 
ignition switch to "LOCK" (OFF) position before connect-
ing or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958 to the data link connector.
(2) Start the engine.
(3) Set scan tool MB991958 to the data reading mode.

• Item 29: Vehicle Speed Sensor.

• Check that the speedometer and scan tool 

MB991958 display speed match when driving at a 
vehicle speed of 40 km/h (25 mph).

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the sensor operating properly?

YES : It can be assumed that this malfunction is intermittent. 

Refer to GROUP 00, How to Use 
Troubleshooting/Inspection Service Points 

− How to 

Cope with Intermittent Malfunction 

P.00-6

.

NO :  Replace the PCM.

AC204681AC

CONNECTOR: D-134

D-134 (GR)

61 62

63 64

65 66 67 68 69 70 71 72 73

82

89

81

88

80

79

78

77

87

86

85

76

75

74

84

83

ACX01539AD

MB991502

16 PIN

Continue

AUTOMATIC TRANSMISSION DIAGNOSIS

TSB Revision

AUTOMATIC TRANSMISSION

23A-177

23A

DTC 31 (P0753): Low-Reverse Solenoid Valve System

AC205195 AB

Solenoid Valve System Circuit

AC204167

CONNECTOR : A-03

AT

A-03 (B)

6

12

5

3 4

2

1

9 10

8

7

11

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-178

.

AC204749

1
2

CONNECTORS : C-03-1, C-03-2, C-03-3
                             C-03-4, C-03-5, C-03-6

C-03-1

C-03-1

1
2

C-03-2

1
2

C-03-3

1
2

C-03-4

1
2

C-03-5

1
2

C-03-6

C-03-2

C-03-3

AC

C-03-4

C-03-6

C-03-5

AC204750

CONNECTOR : D-13

AB

PCM

1
3 4

2

AC204681AD

CONNECTOR: D-136

D-136 (GR)

121 122

123

124

125 126 127 128 129 130

131 132

133

134 135

136 137 138

139 140

141

142 143

144

145

146

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