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
). 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
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
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-
• Refer to configuration diagrams GROUP-
• 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
. The
combination meter works normally.
54DB019A
CONNECTOR: C-101
HARNESS SIDE
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