Mitsubishi Montero (2002-2004). Manual - part 467

COMBINATION METERS ASSEMBLY AND VEHICLE SPEED SENSOR

TSB Revision

CHASSIS ELECTRICAL

54A-39

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CIRCUIT OPERATION

• The tachometer power is supplied from the igni-

tion switch (IG) circuit.

• The tachometer detects the ignition signal control 

via the PCM.

.

TECHNICAL DESCRIPTION (COMMENT)
The ignition signal may not be sent from the engine, 
or there may be a malfunction in the power supply or 
ground circuit.

.

TROUBLESHOOTING HINTS

• Malfunction of the combination meter (printed cir-

cuit board or speedometer and tachometer)

• The wiring harness or connectors may have 

loose, corroded, or damaged terminals, or termi-
nals pushed back in the connector

• Malfunction of the PCM

DIAGNOSIS 

Required Special Tools:

• MB991223: Harness Set

• MB991502: Scan Tool (MUT-II)

STEP 1. Check the tachometer by observing the other 
meters.
Check to see that the speedometer, fuel gauge and water ther-
mometer operate normally.
Q:  Do all other meters operate?

 YES <other meters all operate> : Go to Step 2.
 NO <one of the meters do not operate > : Refer to 

INSPECTION PROCEDURE 5 

P.54A-55

.

AC204176

CONNECTOR: E-111

AK

COMBINATION METERS ASSEMBLY AND VEHICLE SPEED SENSOR

TSB Revision

CHASSIS ELECTRICAL

54A-40

STEP 2. Using scan tool MB991502, check the MFI system 
diagnostic trouble code (DTC).

CAUTION

To prevent damage to scan tool MB991502, always turn the 
ignition switch to "LOCK" (OFF) position before connect-
ing or disconnecting scan tool.
(1) Connect scan tool MB991502 to the data link connector. 
(2) Turn the ignition switch to "ON" position.
(3) Check the MFI system diagnostic trouble code.
Q:  Are MFI system-related DTC(s) set? to the MFI system?

YES : Refer to GROUP 13A, Multiport Fuel Injection (MFI) 

Diagnosis 

P.13Ab-2

.

NO :  Go to Step 3.

STEP 3. Check combination meter connector D-03 and 
PCM connector D-134 for loose, corroded or damaged 
terminals, or terminals pushed back in the connector.
Q: Are combination meter connector D-03 and PCM 

connector D-134 in good condition?
YES : Go to Step 4.
NO :  Repair or replace the damaged component(s). Refer 

to GROUP 00E, Harness Connector Inspection 

P.00E-2

. The tachometer should work normally.

ACX01539

16-pin

MB991502

AI

AC204170

CONNECTOR : D-03

AC

D-03(GR)

HARNESS 
SIDE

51

52

61 60

53

54

56

57

55

63

66 65 64

59

62

58

67

D-03(GR)

AC204171

CONNECTOR : D-134

D-134(GR)

D-134(GR)

AT

HARNESS SIDE

80

87

73

66

67

65
74

81

75

82

6261

72

68

69

70

71

78

85

77

8483

76

79

86

63

64

8988

COMBINATION METERS ASSEMBLY AND VEHICLE SPEED SENSOR

TSB Revision

CHASSIS ELECTRICAL

54A-41

STEP 4. Check the wiring harness between combination 
meter connector D-03 (terminal 66) and PCM connector D-
134 (terminal 87).

NOTE: Also check intermediate connector E-111 and joint con-
nector D-29. If intermediate connector E-111 or joint connector 
D-29 is damaged, repair or replace the connector as described 
in GROUP 00E, Harness Connector Inspection 

P.00E-2

.

Q: Is the wiring harness between combination meter 

connector D-03 (terminal 66) and PCM connector D-134 
(terminal 87) in good condition?
YES : Go to Step 5.
NO :  Repair the wiring harness. The tachometer should 

work normally.

AC204188

CONNECTORS: D-03, D-29

BI

HARNESS SIDE

D-29

D-29

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

D-03(GR)

51

52

61 60

53

54

56

57

55

63

66 65 64

59

62

58

67

D-03(GR)

AC204171

CONNECTOR : D-134

D-134(GR)

D-134(GR)

AT

HARNESS SIDE

80

87

73

66

67

65
74

81

75

82

6261

72

68

69

70

71

78

85

77

8483

76

79

86

63

64

8988

AC204176

CONNECTOR : E-111

BF

15

4

14

37

36

26 27

12

11

35

34

23 24

3

13

25

9

2

8

32

20 21

6

5

17

29

30

18

1

7

19

31

10

22

33

16

28

38

COMBINATION METERS ASSEMBLY AND VEHICLE SPEED SENSOR

TSB Revision

CHASSIS ELECTRICAL

54A-42

STEP 5. Replace and check the combination meter.
Q:  Does the tachometer operate?

YES : There is no action to be taken.
NO :  Replace the PCM. The tachometer should work 

normally.

INSPECTION PROCEDURE 3: Fuel Gauge does not Work.

Fuel Gauge Circuit