Mitsubishi 380. Manual - part 888

COMBINATION METER ASSEMBLY

CHASSIS ELECTRICAL

54A-86

STEP 9. Check fuel pump module connector D-18 and fuel 
level sensor (sub) connector D-17 for loose, corroded or 
damaged terminals, or terminals pushed back in the 
connector.
Q: Is fuel pump module connector D-18 and fuel level 

sensor (sub) connector D-17 in good condition?
YES : Go to Step 10.
NO :  Repair or replace the component(s). Refer to GROUP 

00E, Harness Connector Inspection 

P.00E-2

. The fuel 

gauge should now operate normally.

STEP 10. Check the wiring harness between fuel pump 
module connector D-18 (terminal 2) and fuel level sensor 
(sub) connector D-17 (terminal 1).
Q: Is the wiring harness between fuel pump module 

connector D-18 (terminal 2) and fuel level sensor (sub) 
connector D-17 (terminal 1) in good condition?
YES : Go to Step 11.
NO :  Repair the wiring harness. The fuel gauge should now 

operate normally.

AC305269

D-17

D-18 (GR)

AE

CONNECTORS: D-17, D-18

HARNESS SIDE

D-17

HARNESS SIDE

D-18

AC305269

D-17

D-18 (GR)

AE

CONNECTORS: D-17, D-18

HARNESS SIDE

D-17

HARNESS SIDE

D-18

COMBINATION METER ASSEMBLY

CHASSIS ELECTRICAL

54A-87

STEP11. Retest the system.
 Check that the fuel gauge works normally.

Q: Is the fuel gauge normal?

YES : The procedure is complete. (If no malfunctions are 

found in all steps, an intermittent malfunction is 
suspected. Refer to GROUP 00, How to Use 
Troubleshooting/Inspection Service Points 

− How to 

Cope with Intermittent Malfunction 

P.00-14

).

NO :  Replace the combination meter.

INSPECTION PROCEDURE 10: Engine Coolant Temperature Gauge does not Work (other meters 
work).

.

CIRCUIT OPERATION

The engine coolant temperature sensor sends signal 
to the combination meter via the Engine ECU and 
the CAN bus line.

.

TECHNICAL DESCRIPTION (COMMENT)

If only the engine coolant temperature gauge does 
not operate, the Engine ECU system, the combina-
tion meter, the wiring harness or its connector may 
be defective.

.

16DB409A

ENGINE

COOLANT

TEMPERATURE

SENSOR

THROTTLE

BODY

16DB400A

COVER

ENGINE

CONTROL

UNIT

AIR

CLEANER

54DB024A

C-02

C-29

C-101

C-125 (B)

CONNECTORS: C-02, C-29, C-101, C-125

COMBINATION METER ASSEMBLY

CHASSIS ELECTRICAL

54A-88

TROUBLESHOOTING HINTS

• Refer to circuit diagrams GROUP-

90

• Refer to configuration diagrams GROUP-

80

• Malfunction of the Engine ECU

• Malfunction of the 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 Tools:

• MB991958: Diagnostic Tool (MUT-III Sub Assembly)

• MB991824: Vehicle Communication Interface (V.C.I.)

• MB991827: MUT-III USB Cable

• MB991910: MUT-III Main Harness A (Vehicles with CAN 

communication system)

STEP 1. Using diagnostic tool MB991824, diagnose the 
CAN bus line.
(1) Connect diagnostic tool MB991958 to the data link 

connector.

(2) Turn the ignition switch to "ON" position.
(3) Diagnose the CAN bus line.

Q: Is the check result satisfactory?

YES : Go to Step 2.
NO :  Repair the CAN bus lines. (Refer to GROUP 54C, 

Diagnosis 

− Can Bus Diagnostic Chart 

P.54C-15

). On 

completion, go to Step 3.

STEP 2. Using diagnostic tool MB991958, read MPI 
diagnostic trouble code.
Check if an MPI system DTC is set.

Q: Is the DTC set?

YES : Diagnose the MPI system by referring to  GROUP 

13A, MPI Diagnosis 

− Diagnostic Trouble Code Chart 

P.13A-17

. On completion, go to Step 3.

NO :  Go to Step 3.

00DB076A

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

COMBINATION METER ASSEMBLY

CHASSIS ELECTRICAL

54A-89

Step 3. Retest the system.
Check to see that the engine coolant temperature gauge oper-
ates normally.

Q: Is the check result satisfactory?

YES : The procedure is complete. (If no malfunctions are 

found in all steps, an intermittent malfunction is 
suspected. Refer to GROUP 00, How to Use 
Troubleshooting/Inspection Service Points 

− How to 

Cope with Intermittent Malfunction 

P.00-14

).

NO :  Replace combination meter and then go to step 1.