Mitsubishi Montero (2004+). Manual - part 522

COMBINATION METER ASSEMBLY AND VEHICLE SPEED SENSOR

TSB Revision

CHASSIS ELECTRICAL

54A-57

STEP 9. Check fuel level sensor connector G-03 and 
combination meter connector D-03 for loose, corroded or 
damaged terminals, or terminals pushed back in the 
connector.

Q: Are fuel level sensor connector G-03 and combination 

meter connector D-03 in good condition?
YES : Go to Step 10.
NO :  Repair or replace the damaged component(s). Refer 

to GROUP 00E, Harness Connector Inspection 

P.00E-2

. The fuel gauge should now operate 

normally.

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)

AC204179

CONNECTOR : G-03

AU

G-03(B)

G-03(B)

HARNESS
SIDE

2

3

1

COMBINATION METER ASSEMBLY AND VEHICLE SPEED SENSOR

TSB Revision

CHASSIS ELECTRICAL

54A-58

STEP 10. Check the wiring harness between fuel level 
sensor connector G-03 (terminal 1) and combination meter 
connector D-03 (terminal 63).

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)

AC204179

CONNECTOR : G-03

AU

G-03(B)

G-03(B)

HARNESS
SIDE

2

3

1

COMBINATION METER ASSEMBLY AND VEHICLE SPEED SENSOR

TSB Revision

CHASSIS ELECTRICAL

54A-59

NOTE: Also check intermediate connectors F-07, D-111 and 
joint connector (5) D-29. If intermediate connector F-07, D-111 
or joint connector (5) 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 fuel level sensor 

connector G-03 (terminal 1) and combination meter 
connector D-03 (terminal 63) in good condition?
YES : Repair or replace the combination meter. The fuel 

gauge should now operate normally.

NO :  Repair the wiring harness. The fuel gauge should now 

operate normally.

INSPECTION PROCEDURE 4: Engine Coolant Temperature Gauge does not Work.

AC204171

CONNECTOR : D-111

AQ

9

8

6 7

5

3 4

20

32

21

33

43

17 18

30

41

16

29

28

39 40

13

25

12

24

35 36

14

26

37

15

27

38

19

31

42

1

10

22

2

11

23

34

AC204178

CONNECTOR : F-07

AN

F-07(B)

F-07(B)

7

6

5

1 2 3 4

8

ENGINE
COOLANT
TEMPERATURE
GAUGE UNIT

COMBINATION
METER

CPU

TEMP 
GAUGE

Engine Coolant Temperature Gauge Circuit

COMBINATION METER ASSEMBLY AND VEHICLE SPEED SENSOR

TSB Revision

CHASSIS ELECTRICAL

54A-60

.

CIRCUIT OPERATION

• The ignition switch (IG1) circuit is the power sup-

ply for the engine coolant temperature gauge.

• Resistance value, which the engine coolant tem-

perature gauge unit sends to the combination 
meter, is dependent on temperature of the engine 
coolant. This change in resistance causes the cir-
cuit current to fluctuate, thus moving the needle 
on the gauge.

.

TECHNICAL DESCRIPTION (COMMENT)
If there is an open in the ignition switch (IG1) circuit, 
the gauge needle will not move at all. If there is an 
open in the ground circuit, the gauge needle will 
move down to the extreme cold position.

.

TROUBLESHOOTING HINTS

• Malfunction of the engine coolant temperature 

gauge unit

• Malfunction of the combination meter (printed-cir-

cuit board or engine coolant temperature gauge 
assembly)

• The wiring harness or connectors may have 

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

DIAGNOSIS

Required Special Tool:
MB991223: Harness Set

STEP 1. Check the engine coolant temperature gauge by 
observing the other meters.

Check to see that the speedometer, tachometer and fuel gauge 
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-64

.

AC204168

CONNECTOR : B-38

AE

B-38(B)

AC204170

CONNECTORS : D-03, D-32

DF

D-03(GR)

D-32(GR)

AC204176

CONNECTOR: E-111

AK