Mitsubishi 380. Manual - part 883

COMBINATION METER ASSEMBLY

CHASSIS ELECTRICAL

54A-66

STEP 3. Using diagnostic tool MB991958, read the
diagnostic trouble code related to the other system.
Check if a DTC, which relates to CAN communication-linked
systems below, is set.

• ABS-ECU

DTC U1120: Failure information on Engine ECU (related to
engine) <vehicles with TCL>

• A/T ECU

DTC U1120: Failure information on Engine ECU (related to
engine)

• Multi-centre display

DTC 020 (U1120): Failure information on Engine ECU
(related to engine)

• A/C-ECU

DTC U1120: Failure information on Engine ECU (related to
engine)

Q: Is the DTC set?

YES : Go to Step 4.
NO : Go to Step 5.

STEP 4. Recheck for diagnostic trouble code.
Recheck if the DTC is set.

1. Erase the DTC.
2. Turn the ignition switch to "ON" position.
3. Check if the DTC is set.

Q: Is the check result satisfactory?

YES : A poor connection, open circuit or other intermittent

malfunction is present in the lines between the Engine
ECU and the combination meter (Refer to GROUP
00, How to Use Troubleshooting/Inspection Service
Points

− How to Cope with Intermittent Malfunction

P.00-14

NO : Replace Engine ECU and then go to step 6.

STEP 5. Recheck for diagnostic trouble code.
Recheck if the DTC is set.

1. Erase the DTC.
2. Turn the ignition switch to "ON" position.
3. Check if the DTC is set.

Q: Is the check result satisfactory?

YES : A poor connection, open circuit or other intermittent

malfunction is present in the lines between the Engine
ECU and the combination meter (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 6.

COMBINATION METER ASSEMBLY

CHASSIS ELECTRICAL

54A-67

STEP 6. Recheck for diagnostic trouble code.
Recheck if the DTC is set.

1. Erase the DTC.
2. Turn the ignition switch to "ON" position.
3. Check if the DTC is set.

Q: Is the check result satisfactory?

YES : The procedure is complete.
NO : Go to Step 1.

DTC U1206: Flag invalid

CAUTION

If DTC U1206 is set in the combination meter,
diagnose the CAN main bus line.

CIRCUIT OPERATION

Refer to

P.54A-49

TROUBLE JUDGMENT

When the ignition switch is in the LOCK (OFF) posi-
tion, the combination meter receives door-open sig-
nal or communication standby instruction from the
ETACS-ECU and keeps CAN communication. If
there is a contradiction between these two signals,
DTC U1206 will be set.

COMMENTS ON TROUBLE SYMPTOM

Current trouble

• The door switch system of the ETACS-ECU, the

ETACS-ECU, or the combination meter may be
defective.

Past trouble

• Carry out diagnosis with particular emphasis on

connector(s) or wiring harness between the
ETACS-ECU and the door switch, and the power
supply system to the ETACS-ECU. For diagnosis
procedures, refer to "How to cope with past trou-
ble" (Refer to GROUP 00, How to Use Trouble-
shooting/Inspection Service Points

P.00-14

Possible causes

• The wiring harness or connectors may have

loose, corroded, or damaged terminals, or termi-
nals pushed back in the connector.

• Malfunction of ETACS-ECU

• Malfunction of combination meter

• Refer to circuit diagrams GROUP-

• Refer to configuration diagrams GROUP-

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)

COMBINATION METER ASSEMBLY

CHASSIS ELECTRICAL

54A-68

STEP 1. Using diagnostic tool MB991958, diagnose the
CAN bus line.
Use diagnostic tool MB991958 to diagnose the CAN bus lines.
(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 4.

STEP 2. Using diagnostic tool MB991958, read the
ETACS-ECU diagnostic trouble code.
Check that the ETACS-ECU sets a DTC.

Q: Is the DTC set?

YES : Diagnose the SWS system by referring to

P.54B-25

NO : Go to Step 3.

STEP 3. Replace the ETACS-ECU and then recheck the
DTC.
Replace the ETACS-ECU, and then check that the DTC is not
reset.

Q: Is the check result satisfactory?

YES : Go to Step 4.
NO : Replace combination meter and then go to step 4.

STEP 4. Recheck for diagnostic trouble code.
Recheck if the DTC is set.

1. Erase the DTC.
2. Turn the ignition switch to "ON" position.
3. Check if the DTC is set.

Q: Is the check result satisfactory?

YES : The procedure is complete.
NO : Go to Step 1.

00DB076A

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

COMBINATION METER ASSEMBLY

CHASSIS ELECTRICAL

54A-69

SYMPTOM CHART

M1543007201116

CAUTION

During diagnosis, a DTC code associated with
other system may be set when the ignition switch
is turned on with connector(s) disconnected. On
completion, confirm all systems for DTC code(s).
If DTC code(s) are set, erase them all.

SYMPTOM

INSPECTION
PROCEDURE

REFERENCE PAGE

Communication with diagnostic tool is not possible.

P.54A-70

Power supply circuit.

P.54A-72

Odometer and trip meter are not displayed.

All the needle meters do not work.

When the ignition switch is turned to the ON position, the
indicator and warning lights do not illuminate.

Speedometer does not work.

P.54A-76