Mitsubishi Montero (2004+). Manual — part 945

AUTOMATIC TRANSMISSION DIAGNOSIS

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AUTOMATIC TRANSMISSION

23A-355

INSPECTION PROCEDURE 17: Shift Switch Assembly System

AC205256AB

Shift Switch Assembly System Circuit

AUTOMATIC TRANSMISSION DIAGNOSIS

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AUTOMATIC TRANSMISSION

23A-356

AC204395

CONNECTOR : C-04

AF

C-04 (B)

4
9

5

10

3
8

2
7

6

1

AC204188

CONNECTORS : D-01, D-32

D-01

D-32 (GR)

D-32

CQ

D-01

9 10

8

6 7

31 32

30

29

18 19 20 21

5

4

2

1

3

27

26

24

23

25

12 13 14 15 16 17

28

11
22
33

10

9

23

22

12

11

25

24

8

6 7

20

13

5

4

18

17

19

21

16

3

2

15

14

1

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

AC204191

CONNECTORS : D-208, D-212

5 6

2

4

3

1

JUNCTION BLOCK
(FRONT VIEW)

3

10

9

4

11

8

7

1

5

2

6

D-208

D-208

D-212

D-212

AS

AUTOMATIC TRANSMISSION DIAGNOSIS

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AUTOMATIC TRANSMISSION

23A-357

.

CIRCUIT OPERATION
If the select switch of the shift switch assembly is set
to the sport mode, battery positive voltage will be
applied to the PCM (terminal 85). If the shift switch of
the shift switch assembly is set to "UP" or "DOWN"
position, battery positive voltage will be applied to the
PCM (terminals 68 or 77).

.

COMMENT
The cause is probably a malfunction of the transmis-
sion range switch circuit, shift switch assembly circuit
or a defective PCM.

.

TROUBLESHOOTING HINTS (THE MOST LIKELY
CAUSES FOR THIS CASE:)

• Malfunction of the transmission range switch

• Malfunction of the shift switch assembly select

switch

• Malfunction of the shift switch assembly shift

switch (Up)

• Malfunction of the shift switch assembly shift

switch (Down)

• 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

AC204194

CONNECTORS : E-11, E-113, E-114, E-115

E-113

E-113

E-11

E-11

AX

E-115

E-115

E-114

E-114

3

10

16

9

7 8

6

1

4

2

5

11

14

1213

15

1

6

2

7 8 9 10 11 12 13 14

3 4 5

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

8

3

4 5

1

2

6 7

AUTOMATIC TRANSMISSION DIAGNOSIS

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AUTOMATIC TRANSMISSION

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STEP 1. Using scan tool MB991958, check data list item 67:
Select Switch, item 68: Shift Switch (Up), item 69: Shift
Switch (Down).

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) Turn the ignition switch to the "ON" position.
(3) Set scan tool MB991958 to data reading mode for following

items.

a. item 67: Select Switch
b. item 68: Shift Switch (Up)

c. item 69: Shift Switch (Down)

• The switches above are displayed, depending on the

selector lever condition as shown in the table.

(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.00-6

.

NO <If item 68 and item 69 both are NG> : Go to Step 2.
NO <If only item 67 is NG> : Go to Step 5.
NO <If only item 68 is NG> : Go to Step 15.
NO <If only item 69 is NG> : Go to Step 20.

STEP 2. Check the shift switch assembly.
Refer to

P.23A-559

, Transmission Control.

Q: Is the switch operating properly?

YES : Go to Step 3.
NO : Replace the shift switch assembly. Refer to

P.23A-559

, Transmission Control.

SELECTOR
LEVER
OPERATION

DATA LIST ITEM

67

68

69

D range

OFF

OFF

OFF

Sport mode

ON

OFF

OFF

Upshift and hold
the selector lever

ON

ON

OFF

Downshift and
hold the selector
lever

ON

OFF

ON

AC307591 AC

MB991911

MB991824

MB991827

AC307591

DATA LINK

CONNECTOR