Mitsubishi Montero (2004+). Manual - part 930

AUTOMATIC TRANSMISSION DIAGNOSIS

TSB Revision

AUTOMATIC TRANSMISSION

23A-295

DTC 56: "N" Range Light System

AC100554

"N" Range Light System Circuit

AC

AUTOMATIC TRANSMISSION DIAGNOSIS

TSB Revision

AUTOMATIC TRANSMISSION

23A-296

AC204395

CONNECTOR : C-04

AF

C-04 (B)

4
9

5

10

3
8

2
7

6

1

AC204188

CONNECTORS : D-01, D-03, D-30, D-32

D-01

D-03 (GR)

AW

D-32 (GR)

D-30

D-01,D-30

D-32

D-03

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

58

57

67

66

56

54 55

64

59

53

52

62

61

63

65

60

51

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

TSB Revision

AUTOMATIC TRANSMISSION

23A-297

.

CIRCUIT OPERATION
If a fail-safe is triggered while driving forward, the 
PCM flashes the "N" range light once per second 
(triggered fail-safe). The PCM does this by switching 
battery positive voltage to terminal 75.

.

DTC SET CONDITIONS
If the PCM detects a fail-safe condition, it will attempt 
to illuminate the "N" range light. The PCM sends a 12 
volts pulse for 60 

− 180 ms. If it does not detect a 

voltage drop during the pulse, it waits about 60 sec-
onds and pulses 12 volts again for 60 

− 180 ms. If 

the PCM does no detect the voltage drop before the 
ignition switch is turned the "LOCK" (OFF), the PCM 
will consider it as an short circuit of the "N" range 
light circuit and DTC 56 is set.

.

TROUBLESHOOTING HINTS (THE MOST LIKELY 
CAUSES FOR THIS CODE TO BE SET ARE:)

• Defective "N" range light bulb

• 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-113

E-113

E-11

E-11

BD

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

AUTOMATIC TRANSMISSION DIAGNOSIS

TSB Revision

AUTOMATIC TRANSMISSION

23A-298

STEP 1. Check the "N" range light bulb.
(1) Turn the ignition switch to the "ON" position.
(2) Move the selector lever to "N" position.

• The "N" range light in the combination meter illuminates.

(3) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Does the "N" range light illuminate?

YES : Go to Step 6.
NO :  Go to Step 2.

STEP 2. Check the "N" range light bulb.
(1) Remove the combination meter. Refer to GROUP 54A, 

Chassis Electrical 

− Combination Meters Assembly and 

Vehicle Speed Sensor 

P.54A-76

.

(2) Check the "N" range light bulb.
Q: Is the bulb in good condition?

YES : Go to Step 3.
NO :  Replace the "N" range light bulb.

STEP 3. Check combination meter connectors D-03 and 
D-32 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 4.
NO :  Repair or replace the damaged components. Refer to 

GROUP 00E, Harness Connector Inspection 

P.00E-2

.

AC204188

CONNECTORS : D-03, D-32

D-03 (GR)

AX

D-32 (GR)

D-32

D-03

58

57

67

66

56

54 55

64

59

53

52

62

61

63

65

60

51

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