Mitsubishi Montero Sport (2004+). Manual - part 691

AUTOMATIC TRANSMISSION DIAGNOSIS

TSB Revision

AUTOMATIC TRANSMISSION

23A-329

STEP 11. Check intermediate connector C-85 and PCM 
connector C-90 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 12.
NO :  Repair or replace the damaged components. Refer to 

GROUP 00E, Harness Connector Inspection 

P.00E-2

.

AC202389

11

4

3

9

8

10

5 6

2

1

7

CONNECTOR: C-85

C-85

AB

PCM

60

46

66

57

45

44

64

55 56

65

62 63

52 53

5051

61

42

59

48

41
47
58

43
49

54

AC202313

C-90 (GR)

AB

CONNECTOR: C-90

C-90 (GR)

AUTOMATIC TRANSMISSION DIAGNOSIS

TSB Revision

AUTOMATIC TRANSMISSION

23A-330

STEP 12. Check the harness for open circuit or damage 
between PCM connector C-90 terminal 50 and A/T control 
relay connector C-97 terminal 4.

Q: Is the harness wire in good condition?

YES : Go to Step 17.
NO :  Repair or replace the harness wire.

PCM

60

46

66

57

45

44

64

55 56

65

62 63

52 53

5051

61

42

59

48

41
47
58

43
49

54

AC202313

C-90 (GR)

AB

CONNECTOR: C-90

C-90 (GR)

AC202440

1
3 4

2

CONNECTOR: C-97

AB

C-97

AUTOMATIC TRANSMISSION DIAGNOSIS

TSB Revision

AUTOMATIC TRANSMISSION

23A-331

STEP 13. Check for a short circuit to ground between PCM 
connector C-90 terminal 50 and A/T control relay 
connector C-97 terminal 4.

Q: Is the harness wire in good condition?

YES : Go to Step 17.
NO :  Repair or replace the harness wire.

PCM

60

46

66

57

45

44

64

55 56

65

62 63

52 53

5051

61

42

59

48

41
47
58

43
49

54

AC202313

C-90 (GR)

AB

CONNECTOR: C-90

C-90 (GR)

AC202440

1
3 4

2

CONNECTOR: C-97

AB

C-97

AUTOMATIC TRANSMISSION DIAGNOSIS

TSB Revision

AUTOMATIC TRANSMISSION

23A-332

STEP 14. Measure the A/T control relay output voltage at 
PCM connector C-91 by backprobing.

(1) Do not disconnect connector C-91.
(2) Turn the ignition switch to the "ON" position.

(3) Measure the voltage between terminal 77 and ground by 

backprobing.

• The measured voltage should equal battery positive 

voltage.

(4) Measure the voltage between terminal 89 and ground by 

backprobing.

• The measured voltage should equal battery positive 

voltage.

(5) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the measured voltage equal to battery positive 

voltage between terminal 77 and ground, and between 
terminal 89 and ground?
YES : Go to Step 17.
NO :  Go to Step 15.

PCM

89
98

88
97

76 77

87

86

83
94

84
95

85

96

80
92

81
93

79

78
90 91

82

74

71 72 73

75

AC202312

CONNECTOR: C-91

AB

C-91 (GR)

AC002011AJ

C-91 HARNESS CONNECTOR:
HARNESS SIDE

AC002012 AJ

C-91 HARNESS CONNECTOR:
HARNESS SIDE