Mitsubishi Montero (2004+). Manual — part 521

COMBINATION METER ASSEMBLY AND VEHICLE SPEED SENSOR

TSB Revision

CHASSIS ELECTRICAL

54A-53

.

CIRCUIT OPERATION

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

ply for the fuel gauge.

• When the float in the fuel level sensor moves, the

circuit resistance will change.

• The fuel gauge needle is moved by a change in

the circuit current.

.

TECHNICAL DESCRIPTION (COMMENT)
If there is an open in the (IG1) circuit, the fuel gauge
needle will not move at all. If there is an open in the
ground circuit, the fuel gauge needle will move down
to empty.

.

TROUBLESHOOTING HINTS

• Malfunction of the fuel pump module (fuel level

sensor)

• Malfunction of the combination meter (printed-cir-

cuit board or fuel gauge assembly)

DIAGNOSIS

Required Special Tool:
MB991223: Harness Set

STEP 1. Check the fuel gauge by observing the other
meters.

Check to see that the speedometer, tachometer 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-64

.

AC204170

CONNECTORS : D-03, D-29, D-32

DG

D-03(GR)

D-29

D-32(GR)

AC204171

CONNECTOR : D-111

AG

AC204178

CONNECTOR : F-07

AO

F-07(B)

AC204179

CONNECTOR : G-03

BB

G-03(B)

COMBINATION METER ASSEMBLY AND VEHICLE SPEED SENSOR

TSB Revision

CHASSIS ELECTRICAL

54A-54

STEP 2. Check the fuel level sensor.
Check to see if the fuel level sensor is normal. Refer to

P.54A-74

.

Q: Is the fuel level sensor normal?

YES : Go to Step 3.
NO : Replace the fuel level sensor. The fuel gauge should

now operate normally.

STEP 3. Measure at fuel level sensor connector G-03 in
order to the ground circuit to the fuel level sensor.

(1) Disconnect fuel level sensor connector G-03, and measure

at the wiring harness side.

(2) Measure the resistance value between terminal 2 and

ground.

• The resistance should equal 2 ohms or less.

Q: Is the measured resistance 2 ohms or less?

YES : Go to Step 6.
NO : Go to Step 4.

STEP 4. Check fuel level sensor connector G-03 for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.

Q: Is fuel level sensor connector G-03 in good condition?

YES : Go to Step 5.
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.

AC204179

CONNECTOR : G-03

AU

G-03(B)

G-03(B)

HARNESS
SIDE

2

3

1

AC204738 EI

HARNESS SIDE: G-03

2

3

1

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-55

STEP 5. Check the wiring harness between fuel level
sensor connector G-03 (terminal 2) and ground.

NOTE: Also check intermediate connectors F-07. If intermedi-
ate connector F-07 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 2) and ground in good
condition?
YES : There is no action to be taken.
NO : Repair the wiring harness. The fuel gauge should now

operate normally.

STEP 6. Measure at combination meter connector D-32 in
order to the ground circuit to the fuel gauge.

(1) Disconnect combination meter connector D-32 and

measure at the wiring harness side.

(2) Measure the resistance value between terminal 11 and

ground.

• The resistance should equal 2 ohms or less.

Q: Is the measured resistance 2 ohms or less?

YES : Go to Step 9.
NO : Go to Step 7.

AC204179

CONNECTOR : G-03

AU

G-03(B)

G-03(B)

HARNESS
SIDE

2

3

1

AC204178

CONNECTOR : F-07

AN

F-07(B)

F-07(B)

7

6

5

1 2 3 4

8

AC204170

CONNECTOR : D-32

CU

HARNESS SIDE

D-32(GR)

D-32(GR)

3

4

16

17

1

2

14

15

5

7 6

19

13

8

9

21

22

20

18

23

10

11

24

25

12

AC204738 EF

HARNESS SIDE: D-32

3

4

16

17

1

2

14

15

5

7 6

19

13

8

9

21

22

20

18

23

10

11

24

25

12

COMBINATION METER ASSEMBLY AND VEHICLE SPEED SENSOR

TSB Revision

CHASSIS ELECTRICAL

54A-56

STEP 7. Check combination meter connector D-32 for
loose, corroded or damaged terminals, or terminals
pushed back in the connector.
Q: Is combination meter connector D-32 in good

condition?
YES : Go to Step 8.
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.

STEP 8. Check the wiring harness between combination
meter connector D-32 (terminal 11) and ground.

Q: Is the wiring harness between combination meter

connector D-32 (terminal 11) and ground in good
condition?
YES : There is no action to be taken.
NO : Repair the wiring harness. The fuel gauge should now

operate normally.

AC204170

CONNECTOR : D-32

CU

HARNESS SIDE

D-32(GR)

D-32(GR)

3

4

16

17

1

2

14

15

5

7 6

19

13

8

9

21

22

20

18

23

10

11

24

25

12

AC204170

CONNECTOR : D-32

CU

HARNESS SIDE

D-32(GR)

D-32(GR)

3

4

16

17

1

2

14

15

5

7 6

19

13

8

9

21

22

20

18

23

10

11

24

25

12