Mitsubishi 380. Manual - part 896

COMBINATION METER ASSEMBLY

CHASSIS ELECTRICAL

54A-118

STEP 9. Using diagnostic tool MB991958, 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 10.
NO :  Repair the CAN bus lines (Refer to GROUP 54C, 

Diagnosis-Can Bus Diagnostic Chart 

P.54C-15

). On 

completion, go to Step 12.

STEP 10. Check Engine-ECU connector B-20 and B-21 for 
loose, corroded or damaged terminals, or terminals 
pushed back in the connector.
Q: Are the Engine-ECU connectors B-20 and B-21 in good 

condition?
YES : Go to Step 11.
NO :  Repair or replace the component(s). Refer to GROUP 

00E, Harness Connector Inspection 

P.00E-2

.

STEP11. Using diagnostic tool MB991958, read MPI system 
diagnostic trouble code.
Check if the MPI system DTC is set.

Q: Is the DTC set?

YES : Diagnose the MPI system (Refer to GROUP 13A, MPI 

Diagnosis 

− Diagnostic Trouble Code Chart . On 

completion, go to Step 12.

NO :  Go to Step 12.

00DB076A

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

16DB400A

COVER

ENGINE

CONTROL

UNIT

AIR

CLEANER

COMBINATION METER ASSEMBLY

CHASSIS ELECTRICAL

54A-119

STEP 12. Retest the system.
Check that the function works 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 the Engine-ECU.

COMBINATION METER ASSEMBLY

CHASSIS ELECTRICAL

54A-120

INSPECTION PROCEDURE 9: Average fuel displays "- - -" litres/100 km. INSPECTION PROCEDURE 
10: Instant fuel always displays "--.-" litres/ 100km. INSPECTION PROCEDURE 11: Total distance 
travelled does not operate (increase). INSPECTION PROCEDURE 12: Average speed always displays 
"- - . -" km/h. INSPECTION PROCEDURE 13: Rest reminder does not function. INSPECTION 
PROCEDURE 14: Sevice reminder does not function.

16DB402A

A-02 (GR)

CONNECTOR: A-02 

A-02 HARNESS CONNECTOR:

10DB076A

OUTPUT SHAFT

SPEED SENSOR

   (B-19) GR

BATTERY

AUTOMATIC

TRANSMISSION

16DB407A

COVER

ENGINE

CONTROL

UNIT

AIR

CLEANER

A/T

CONTROL

UNIT

MANUAL
TRANSMISSION

    

SPEED SENSOR

22DB018A

54DB025A

C-02

C-29

C-101

CONNECTORS: C-02, C-29, C-101

COMBINATION METER ASSEMBLY

CHASSIS ELECTRICAL

54A-121

CAUTION

When the battery cable is disconnected or the 
combination meter is removed, the fuel gauge 
learned value will be erased. To let the display 
unit re-learn it, enter the vehicle speed (by driv-
ing the vehicle or entering simulated vehicle 
speed) and then stop the vehicle.

.

CIRCUIT OPERATION

The output shaft speed sensor (A/T) sends vehicle 
signal to the combination meter via the A/T-ECU and 
the CAN bus line (automatic transmission) while the 
speed sensor (M/T) sends vehicle signal to the com-
bination meter via the ENGINE-ECU and the CAN 
bus line (manual transmission (M/T)).

.

TECHNICAL DESCRIPTION (COMMENT)

If only the speedometer does not operate, the Engine 
ECU system, the combination meter, the wiring har-
ness or its connector may be defective. Furthermore, 
incorrect level of fuel is shown on the gauge, 
because the display unit can not learn the fuel 
gauge.

.

TROUBLESHOOTING HINTS

• Refer to circuit diagrams GROUP-

90

• Refer to configuration diagrams GROUP-

80

• Speed sensor malfunction

• Malfunction of the trip computer/ combination 

meter

• Malfunction of the Engine ECU

• 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. Check combination meter connector C-101 for 
loose, corroded or damaged terminals, or terminals 
pushed back in the connector.
Q: Is combination meter connector C-101 in good 

condition?
YES : Go to Step 2.
NO :  Repair or replace the component(s). Refer to GROUP 

00E, Harness Connector Inspection 

P.00E-2

. The 

combination meter works normally.

54DB019A

CONNECTOR: C-101

HARNESS SIDE