Mitsubishi Colt Ralliart. Manual - part 477

COMBINATION METER

CHASSIS ELECTRICAL

54A-53

Inspection Procedure 9: Fuel Gauge does not Work (Other Meters Work).

FUEL PUMP
AND GAUGE
UNIT

Wire colour code
B : Black     LG : Light green     G : Green     L : Blue     W : White     Y : Yellow     SB : Sky blue
BR : Brown     O : Orange     GR : Gray     R : Red     P : Pink     V : Violet

COMBINATION 
METER

F/GA

Fuel Pump and Gauge Unit Circuit

COMMENTS ON TROUBLE SYMPTOM

If only the fuel gauge does not operate, the fuel 
pump and gauge unit, the combination meter, wiring 
harness or connector(s) may be defective.

POSSIBLE CAUSES

• Damaged harness wires and connectors

• Malfunction of the fuel pump and gauge unit

• Malfunction of combination meter

DIAGNOSIS PROCEDURE

STEP 1. Connector check: C-16 fuel pump and 
gauge unit connector

AC313834AG

Connector: C-16

Harness side

2

3

5

1

4

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Repair the connector, and then go to Step 9.

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COMBINATION METER

CHASSIS ELECTRICAL

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STEP 2. Check the fuel gauge circuit.

•

AC313834AG

Connector: C-16

Harness side

2

3

5

1

4

Disconnect fuel pump and gauge unit connector 

C-16.

•

AC314221

MB991219

Test lamp
(12V - 3.4W)

AB

Use the special tool Check harness (MB991219) to 

connect a test lamp (12 V - 3.4 W) between the 
wiring harness connector terminals 1 and 2.

• Turn the Ignition switch to "ON" position.

• Check if the test lamp illuminates.

OK: Illuminates

Q: Is the check result satisfactory?

YES : 

Go to Step 7.

NO : 

Go to Step 3.

STEP 3. Resistance measurement at fuel pump 
and gauge unit connector C-16.

•

AC313834AG

Connector: C-16

Harness side

2

3

5

1

4

Disconnect fuel pump and gauge unit connector 

C-16, and measure at the wiring harness side.

• Turn the Ignition switch to "LOCK" (OFF) posi-

tion.

• Disconnect the negative battery terminal.

•

AC208309IB

Connector C-16
(Harness side)

2

3

5

1

4

Continuity between fuel pump and gauge unit con-

nector C-16 terminal No.1 and body earth

OK: Continuity exists (2 

Ω or less)

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Go to Step 4.

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COMBINATION METER

CHASSIS ELECTRICAL

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STEP 4. Check the wiring harness wire between 
fuel pump and gauge unit connector C-16 
terminal No.1 and body earth.

AC313834AG

Connector: C-16

Harness side

2

3

5

1

4

Q: Is the wiring harness between fuel pump and 

gauge unit connector C-16 terminal No.1 and body 
earth in good condition?
YES : 

Go to Step 9.

NO : 

Repair the harness, and then go to Step 9.

STEP 5. Connector check: B-14 combination 
meter connector and C-16 fuel pump and gauge 
unit connector

AC313822AR

Connector: B-14

Harness side

B-14(B)

AC313834AG

Connector: C-16

Harness side

2

3

5

1

4

Q: Is the check result satisfactory?

YES : 

Go to Step 6.

NO : 

Repair the connector, and then go to Step 9.

STEP 6. Check the wiring harness between 
combination meter connector B-14 terminal 
No.22 and fuel pump and gauge unit connector 
C-16 terminal No.2.

AC313822AR

Connector: B-14

Harness side

B-14(B)

AC313834AG

Connector: C-16

Harness side

2

3

5

1

4

Q: Is the wiring harness between combination meter 

connector B-14 terminal No.22 and fuel pump and 
gauge unit connector C-16 terminal No.2 in good 
condition?
YES : 

Go to Step 9.

NO : 

Repair the harness, and then go to Step 9.

STEP 7. M.U.T.-III actuator test

• Item 8C:  Fuel gauge:  0 %

• Item 8D: Fuel gauge:  50 %

• Item 8E:  Fuel gauge:  100 %

OK: The fuel gauge operates.

Q: Is the check result satisfactory?

YES : 

Go to Step 8.

NO : 

After the combination meter is replaced, 
then go to Step 9.

STEP 8. Retest the system.
 Check that the fuel gauge works normally.

Q: Is the check result satisfactory?

YES : 

The procedure is complete.

NO : 

Replace the fuel pump and gauge unit, and 
the go to Step 9.

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CHASSIS ELECTRICAL

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STEP 9. Retest the system.
 Check that the fuel gauge works normally.

Q: Is the check result satisfactory?

YES : 

The procedure is complete.

NO : 

Return to Step 1.

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