Mitsubishi 380. Manual — part 893

COMBINATION METER ASSEMBLY

CHASSIS ELECTRICAL

54A-106

SYMPTOM PROCEDURES

INSPECTION PROCEDURE 1: Range to empty always displays flashing "- - -" km (even when fuel tank
is full. INSPECTION PROCEDURE 2: Range to empty does not detect refuels (even when > 7 litres)

.

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 only the fuel gauge does not operate, the fuel
pump module, the fuel level sensor (sub), the combi-
nation meter, wiring harness or connector(s) may be
defective.

.

TROUBLESHOOTING HINTS

• Refer to circuit diagrams GROUP-

90

• Refer to configuration diagrams GROUP-

80

• Malfunction of the fuel pump module or fuel level

sensor (sub)

• Malfunction of the trip computer/ combination

meter

• 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 fuel pump module.
Check to see if the fuel pump module is normal. Refer to

P.54A-95

.

Q: Is the fuel pump module normal?

YES : Go to Step 2.
NO : Replace the fuel pump module (Refer to GROUP

13B, Fuel Tank

P.13B-6

). The fuel gauge should now

operate normally.

54DB029A

C-28

C-101

CONNECTORS: C-28, C-101

AC305268

AR

CONNECTORS: D-17, D-18

D-17

D-18 (GR)

COMBINATION METER ASSEMBLY

CHASSIS ELECTRICAL

54A-107

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

P.54A-95

.

Q: Is the fuel level sensor (sub) normal?

YES : Go to Step 3.
NO : Replace the fuel level sensor (Refer to GROUP 13B,

Fuel Tank

P.13B-6

).

STEP 3. Check fuel pump module connector D-18 for
loose, corroded or damaged terminals, or terminals
pushed back in the connector.
Q: Is fuel pump module connector D-18 in good condition?

YES : Go to Step 4.
NO : Repair or replace the component(s). Refer to GROUP

00E, Harness Connector Inspection

P.00E-2

.

STEP 4. Test at fuel pump module connector D-18 to check
the power circuit to the fuel pump module.
(1) Remove the rear seat (Refer to GROUP 52A, Rear Seat

Assembly

P.52A-55

).

(2) Use special tool MB991219 to connect a test lamp (12 V -

3.4 W) between the wiring harness connector terminals 1
and 2.

(3) Turn the Ignition switch to "ON" position.
(4) Check if the test lamp illuminates.

OK: Illuminates

Q: Is the check result satisfactory?

YES : Go to Step 11.
NO : Go to Step 5.

AC305268

D-18 (GR)

AP

CONNECTOR: D-18

HARNESS SIDE

AC305268

D-18 (GR)

AP

CONNECTOR: D-18

HARNESS SIDE

AC306950

AB

TEST LAMP

MB991219

COMBINATION METER ASSEMBLY

CHASSIS ELECTRICAL

54A-108

STEP 5. Measure the resistance at fuel pump module
connector D-18 to check the ground circuit to the fuel
pump module.
(1) Disconnect fuel pump module connector D-18, and

measure at the wiring harness side.

(2) Measure the resistance value between terminal 1 and

ground.

• The resistance should be 2 ohms or less.

Q: Is the measured resistance 2 ohms or less?

YES : Go to Step 7.
NO : Go to Step 6.

STEP 6. Check the wiring harness between fuel pump
module connector D-18 (terminal 1) and ground.
Q: Is the wiring harness between fuel pump module

connector D-18 (terminal 1) and ground in good
condition?
YES : Go to Step 7.
NO : Repair the wiring harness. The range to empty display

should now operate normally.

AC305268

D-18 (GR)

AP

CONNECTOR: D-18

HARNESS SIDE

AC209364

CONNECTOR D-18
(HARNESS SIDE)

JS

AC305268

D-18 (GR)

AP

CONNECTOR: D-18

HARNESS SIDE

COMBINATION METER ASSEMBLY

CHASSIS ELECTRICAL

54A-109

STEP 7. Check combination meter connector C-101 and
fuel level sensor (sub) connector D-17 for loose, corroded
or damaged terminals, or terminals pushed back in the
connector.
Q: Is combination meter connector C-101 and fuel level

sensor (sub) connector D-17 in good condition?
YES : Go to Step 8.
NO : Repair or replace the component(s). Refer to GROUP

00E, Harness Connector Inspection

P.00E-2

. Then go

to Step 4.

54DB019A

CONNECTOR: C-101

HARNESS SIDE

AC305268

AQ

CONNECTOR: D-17

HARNESS SIDE