Mitsubishi Montero Sport (2004+). Manual — part 704

AUTOMATIC TRANSMISSION DIAGNOSIS

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AUTOMATIC TRANSMISSION

23A-381

STEP 7. Using scan tool MB991958, check data list item 65:
Dual Pressure Switch.

CAUTION

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

• Item65: Dual Pressure Switch.

• When the A/C is in operation, the scan tool

MB991958 display should be "ON."

• When the A/C is not in operation, the scan tool

MB991958 display should be "OFF."

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the switch 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.00-7

.

NO : Check the air conditioning system. Refer to GROUP

55, Troubleshooting Strategy

P.55-5

.

AK303629AB

MB991911

MB991827

MB991824

16-PIN

AUTOMATIC TRANSMISSION DIAGNOSIS

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AUTOMATIC TRANSMISSION

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STEP 8. Check automatic compressor controller connector
C-09 and intermediate connector C-41 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 9.
NO : Repair or replace the damaged components. Refer to

GROUP 00E, Harness Connector Inspection

P.00E-2

.

STEP 9. Check the harness for open circuit between dual
pressure switch connector A-23 terminal 1 and automatic
compressor controller connector C-09 terminal 2.

Q: Is the harness wire in good condition?

YES : Go to Step 15.
NO : Repair or replace the harness wire.

AC103771

CONNECTOR: C-09

AF

C-09

4

2

1

3

AC202442

22

2021

10

9

8

1718

6 7

19

1415

4 5

1112

1 2 3

13

16

CONNECTOR: C-41

C-41

AB

AC202889

1 2

AB

CONNECTOR: A-23

A-23 (BR)

AC103771

CONNECTOR: C-09

AF

C-09

4

2

1

3

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STEP 10. Measure the switch output voltage at PCM
connector C-91 by backprobing.

(1) Do not disconnect connector C-91.
(2) Start the engine and run at idle.

(3) Operate the A/C.

(4) Measure the voltage between terminal 83 and ground by

backprobing.

• When the A/C is in operation, the voltage should mea-

sure battery positive voltage.

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

YES : Go to Step 16.
NO : Go to Step 11.

AC202435

PCM

59
68

58
67

46 47

57

56

53
64

54

65

55

66

50

62

51

63

49

48
60 61

52

44

41 42 43

45

AC202435

PCM

CONNECTOR: C-91

AB

C-91 (GR)

71 72 73 74

75 76

77

78 79 80 81 82 83 84 85 86 87 88

90 91

92 93 94

95 96

97

98

89

AC002096 AJ

C-91 HARNESS CONNECTOR:
HARNESS SIDE

AUTOMATIC TRANSMISSION DIAGNOSIS

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AUTOMATIC TRANSMISSION

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STEP 11. Check A/C refrigerant temperature switch
connector A-25, intermediate connector A-89 and PCM
connector C-91 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

.

AC202894

6

3

4

1 2

5

2

1

3

CONNECTORS: A-25, A-89

A-25 (B)

A-89 (B)

AB

AC202435

PCM

59
68

58
67

46 47

57

56

53
64

54

65

55

66

50

62

51

63

49

48
60 61

52

44

41 42 43

45

AC202435

PCM

CONNECTOR: C-91

AB

C-91 (GR)

71 72 73 74

75 76

77

78 79 80 81 82 83 84 85 86 87 88

90 91

92 93 94

95 96

97

98

89