Mitsubishi 380. Manual — part 886

COMBINATION METER ASSEMBLY

CHASSIS ELECTRICAL

54A-78

STEP 2. Using diagnostic tool MB991958, read A/T
diagnostic trouble code.
Check if an A/T system or Engine (MPI) system DTC is set.

Q: Is the DTC set?

YES : Refer to GROUP 23A, Automatic Transmission

Diagnosis or GROUP 13A Engine (MPI)

− Diagnostic

Trouble Code Chart

P.23A-34

, or refer to Output

speed sensor system

P.23A-72

. On completion, go to

Step 4.

NO : Go to Step 3.

STEP 3. Check the speedometer
Use diagnostic tool MB991958 to enter simulated vehicle
speed.
(1) Connect diagnostic tool MB991958 to the data link

connector.

(2) Turn the ignition switch to "ON" position.
(3) Select "Interactive Diagnosis" from the start-up screen.
(4) Select "System Select."
(5) Choose "Meter" .
(6) Select "Simulated vehicle Speed Output."

OK: The speedometer shows that simulated vehi-
cle speed.

Q: Is the check result satisfactory?

YES : Go to Step 4.
NO : Replace the combination meter, then go to Step 4.

STEP 4. Retest the system.
Check that the speedometer 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 : Go to step 1.

COMBINATION METER ASSEMBLY

CHASSIS ELECTRICAL

54A-79

INSPECTION PROCEDURE 8: Tachometer does not Work.

.

CIRCUIT OPERATION

The Engine ECU sends ignition signal to the combi-
nation meter via CAN bus line.

.

TECHNICAL DESCRIPTION (COMMENT)

If only the tachometer does not operate, the Engine
ECU system may not be sending ignition signal, or
the combination meter, the wiring harness or its con-
nector may be defective.

.

TROUBLESHOOTING HINTS

• Refer to circuit diagrams GROUP-

90

• Refer to configuration diagrams GROUP-

80

• 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

16DB402A

A-02 (GR)

CONNECTOR: A-02

A-02 HARNESS CONNECTOR:

16DB407A

COVER

ENGINE

CONTROL

UNIT

AIR

CLEANER

A/T

CONTROL

UNIT

54DB025A

C-02

C-29

C-101

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

COMBINATION METER ASSEMBLY

CHASSIS ELECTRICAL

54A-80

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

communication system)

STEP 1. 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 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 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 3.

NO : Go to Step 3.

STEP 3. Retest the system.
Check that the tachometer 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 combination meter.

00DB076A

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

COMBINATION METER ASSEMBLY

CHASSIS ELECTRICAL

54A-81

INSPECTION PROCEDURE 9: Fuel Gauge does not work (other meters work).

.

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.

.

54DB029A

C-28

C-101

CONNECTORS: C-28, C-101

AC305268

AR

CONNECTORS: D-17, D-18

D-17

D-18 (GR)