Mitsubishi Montero Sport (2004+). Manual - part 630

AUTOMATIC TRANSMISSION DIAGNOSIS

TSB Revision

AUTOMATIC TRANSMISSION

23A-85

Q: Are the connectors and terminals in good condition?

YES : Go to Step 14.
NO :  Repair or replace the damaged components. Refer to 

GROUP 00E, Harness Connector Inspection 

P.00E-2

.

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-86

STEP 14. Check the harness for open circuit or damage 
between input shaft speed sensor harness side connector 
B-16 terminal 1 and PCM connector C-90 terminal 57.

Q: Is the harness wire in good condition?

YES : Go to Step 16.
NO :  Repair or replace the harness wire.

AC202362

2 3

1

CONNECTOR: B-16

AB

B-16 (B)

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-87

STEP 15. Check PCM connector C-90 for loose, corroded 
or damaged terminals, or terminals pushed back in the 
connector.

Q: Are the connector and terminals in good condition?

YES : Replace the PCM.
NO :  Repair or replace the damaged components. Refer to 

GROUP 00E, Harness Connector Inspection 

P.00E-2

.

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-88

STEP 16. Using an oscilloscope, check the input shaft 
speed sensor waveform at PCM connectors C-90 and C-92 
by backprobing.

(1) Do not disconnect connectors C-90 and C-92.

(2) Connect an oscilloscope probe to PCM connector C-90 

terminal 57 and to PCM connector C-92 terminal 103 by 
backprobing.

(3) Start the engine and drive the vehicle at constant speed of 

50 km/h (31 mph) (Gear range: 3rd gear).

(4) Check the input shaft speed sensor waveform.

• The input shaft speed sensor waveform should show a 

pattern similar to the illustration. The maximum value 
should be 4.8 volts and more and the minimum value 
0.8 volt and less. The output waveform should not con-
tain electrical noise.

(5) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the waveform normal?

YES : Go to Step 19.
NO :  Go to Step 17.

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)

AC001899AH

C-90 HARNESS CONNECTOR:
HARNESS SIDE

C-92 HARNESS CONNECTOR:
HARNESS SIDE 

PROBE

OSCILLO-
SCOPE

ACX02131

NORMAL WAVEFORM

AD

(V)

5

0