Mitsubishi 380. Manual — part 932

MULTI-CENTER DISPLAY

CHASSIS ELECTRICAL

54A-262

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 U1101: A/T-ECU time-out <vehicles with TCL>

Combination meter

• DTC 012 (U1101): A/T-ECU time-out

ETACS-ECU

• DTC 012 (U1101): A/T-ECU time-out

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 CAN bus lines between
the A/T-ECU and the middle-grade multi-centre
display unit (Refer to GROUP 00, How to Use
Troubleshooting/Inspection Service Points - How to
Cope with Intermittent Malfunction

P.00-14

).

NO : Replace A/T-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 CAN bus lines between
the A/T-ECU and the middle-grade multi-centre
display unit (Refer to GROUP 00, How to Use
Troubleshooting/Inspection Service Points - How to
Cope with Intermittent Malfunction

P.00-14

).

NO : Replace multi-centre display unit and then go to step

6.

MULTI-CENTER DISPLAY

CHASSIS ELECTRICAL

54A-263

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.

MULTI-CENTER DISPLAY

CHASSIS ELECTRICAL

54A-264

DTC 013 (U1110): A/C-ECU Time-out

CAUTION

If DTC 013 (U1110) is set in the multi-centre dis-
play, always diagnose the CAN bus lines.

CAUTION

Whenever the ECU is replaced, ensure that the
communication circuit is normal.

.

CIRCUIT OPERATION

The multi-centre display unit communicates with the
A/C-ECU via CAN bus lines.

.

DTC SET CONDITION

When the multi-centre display unit can not receives
necessary signals from the A/C-ECU via CAN bus
lines. If the display unit can not receives the neces-
sary A/C-ECU signals, DTC 013 (U1110) will be set.

.

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

16DB477A

C-15 HARNESS SIDE

CONNECTOR: C-15

C-15 (B)

MULTI-CENTER DISPLAY

CHASSIS ELECTRICAL

54A-265

TECHNICAL DESCRIPTION (COMMENT)

CAUTION

If the ignition switch is turned to the ON position
without starting the engine, DTC (past trouble)
011, 012 and 014 (U1108) may be set to the com-
bination meter (incorporating meter-ECU) after
three minutes.

Current trouble

• Connector(s) or wiring harness in the CAN bus

lines between the A/C-ECU and the multi-centre
display unit, the power supply system to the dis-
play unit, the display unit itself, or the A/C-ECU
may be defective.

Past trouble

• Carry out diagnosis with particular emphasis on

connector(s) or wiring harness in the CAN bus
lines between the A/C-ECU and the multi-centre
display unit , and the power supply system to the
A/C-ECU. For diagnosis procedures, refer to
"How to cope with past trouble" (Refer to GROUP
00, How to Use Troubleshooting/Inspection Ser-
vice Points

P.00-14

).

NOTE: For a past trouble, you may not find it by
the MUT-III CAN bus diagnostics even if there is
any failure in CAN bus lines. In this case, refer to
GROUP 00, How to Use Troubleshooting/Inspec-
tion Service Points - How to Cope with Intermit-
tent Malfunction

P.00-14

.) and check the CAN

bus lines. You can narrow down the possible
cause of the trouble by referring to the DTC,
which is set regarding the CAN communica-
tion-linked ECUs (Refer to GROUP 54C, CAN
bus line Diagnostics Flow

P.54C-6

).

.

TROUBLESHOOTING HINTS

• Refer to circuit diagrams GROUP-

90

• Refer to configuration diagrams GROUP-

80

• The wiring harness or connectors may have

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

• Malfunction of A/C-ECU

• Malfunction of multi-centre display unit

DIAGNOSIS

Required Special Tools:

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

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

• MB991827: MUT-III USB Cable

• MB991911: MUT-III Main Harness A (Vehicles with CAN

communication system)