Mitsubishi 380. Manual — part 928

MULTI-CENTER DISPLAY

CHASSIS ELECTRICAL

54A-246

MULTI-CENTER DISPLAY

GENERAL DESCRIPTION

M1543000100364

The multi-centre display can show a message based
on information, which is obtained via CAN bus com-
munication. In addition, the multi-centre display
offers a service mode function (self-diagnosis), over-
write (customise) function of the ETACS and
multi-centre display setting.

.

Graphical display function of
multi-centre display

• Digital clock display (incorporating clock)

• Calendar display

• Audio system operation display (communicating

with radio, CD player and CD changer)

• Speaker test display (communicating with radio,

CD player and CD changer)

• Outside air temperature display (communicating

with the A/C-ECU via CAN bus)

• Road surface freeze warning display (communi-

cating with the A/C-ECU via CAN bus)

• A/C operation display (communicating with the

A/C ECU via CAN bus)

Precautions during service

.

Diagnosis tips concerning the entire sys-
tem

• Check that relevant wiring harness connectors

are engaged correctly. If a failure is found, repair
the connectors and check the trouble symptom
again.

• If the wiring harness connectors are engaged

correctly, check the wiring harness. If the wiring
harness is in good condition, replace relevant
components.

NOTE: If a system communication (CAN commu-
nication) related failure is suspected, diagnose
the CAN communication system.

.

Diagnosis tips when only specific
function(s) is defective

• Check that the wiring harness connectors related

to the specific function are engaged correctly. If a
failure is found, repair the connectors and check
the trouble symptom again.

• If the wiring harness connectors are engaged

correctly, check the wiring harness. If the wiring
harness is in good condition, replace relevant
components, which controls that function.

MULTI-CENTER DISPLAY SYSTEM

FUNCTION
BUTTON
SWITCH 1

FUNCTION
BUTTON
SWITCH 2

FUNCTION
BUTTON
SWITCH 3

DISPLAY
BUTTON
SWITCH

16DB548A

MULTI-CENTRE DISPLAY

MULTI-CENTER DISPLAY

CHASSIS ELECTRICAL

54A-247

Communication error processing

The multi-centre display unit communicates with
specific units via CAN and M bus lines. If an abnor-
mality occurs (such as communication cancellation,
interruption or out-of-range data), the screen will be
frozen for some time. If a correct signal is received
within specific period after that, the screen will be
updated. If not, "COMMUNICATION ERROR" will be
displayed on the screen. This screen indicates a fail-
ure in the multi-centre display unit itself, communica-
tion error with relevant units, components or sensor.
In this case, you can pinpoint a trouble spot accord-
ing to the CAN communication DTC code chart.

16DB549A

A/C DISPLAY

OUTSIDE AIR TEPERATURE

DISPLAY CUSTOMIZE FUNCTION

ETACS-ECU

A/C-ECU

OUTSIDE AIR

TEMPERATURE

SENSOR

COMBINATION
METER

RADIO, CD PLAYER
AND CD CHNGER

CAN-BUS

M-BUS

MULTI-CENTRE DISPLAY

CLOCK

SYSTEM BLOCK

AUDIO
DISPLAY

ENGINE-ECU

16DB550A

ERROR MESSAGE

3

AC306650AB

A

B

A:

B:

NOTE:

PROCESSING COMMUNICATION ERROR

ABNORMAL DATA
RECEIVED

NORMAL
SCREEN

SCREEN
FREEZE

SCREEN
UPDATE

NORMAL
SCREEN

NORMAL
SCREEN

ERROR
DISPLAY

COMMUNICATION
RETURNED TO NORMAL

NORMAL SIGNAL IS RECEIVED WITHIN 60 SECONDS (CAN-BUS)

NORMAL SIGNAL IS RECEIVED WITHIN 60 SECONDS (M-BUS)
NORMAL SIGNAL HAS NOT BEEN RECEIVED FOR 60 OR MORE SECONDS (CAN-BUS)

NORMAL SIGNAL HAS NOT BEEN RECEIVED FOR 30 OR MORE SECONDS (M-BUS)

MULTI-CENTER DISPLAY

CHASSIS ELECTRICAL

54A-248

FAILURE DIAGNOSIS SERVICE MODE
FUNCTION

The multi-centre display unit with the following func-
tions for the failure diagnosis service.

CAUTION

The "Compass check" mode will be displayed on
the multi-centre display but will not be accessi-
ble due to not being available on vehicle.

.

Starting up the service mode

1. ignition switch "LOCK" (OFF) position.
2. Turn the ignition switch to the "ACC" position while

depressing the "DISP" button on the multi-centre display
unit. After approximately 5 seconds, the service mode
start-up screen is displayed.

.

Communication check

1. Activate the service mode start-up screen.

2. ignition switch "ON" position.

3. Choose "communication check mode" by pressing the

function button switch 2.

4. Execute "ENTER" by pressing the function button switch 3.

Service mode function

CONTENTS

Service
function

Communication check

The multi-centre display checks communication conditions
below, and shows the check result on the screen. Turn the
ignition switch to the ON position before using this
function.

• M bus communication condition between the

multi-centre display unit and the audio system

• Communication condition between the multi-centre

display unit and relevant units (such as ETACS-ECU)

Monitor check

Checks whether the screen display functions.

Compass check (not available)

-

Vehicle check

Displays current vehicle conditions below

• Displays the current condition of the lighting switch.

• Displays the current position of the ignition switch.

• Displays the current voltage of the battery

Auto check

Checks the following items automatically.

• Communication check

• Monitor check

• Vehicle check

AC208698AB

BACK

ENTER

Service mode

1. Communication check

2. Monitor check

3. Compass check

4. Vehicle check

5. Auto check

AC208699

AB

MULTI-CENTER DISPLAY

CHASSIS ELECTRICAL

54A-249

5. The multi-centre display checks the communication

conditions and displays the check result.

.

Monitor check

1. Choose "Monitor check" from the service mode start-up

screen by pressing function button switch 2, and then
execute "ENTER" by pressing function button switch 3.

2. Choose a color by function button switch 2, and then

execute "ENTER" by function button switch 3. You can
check the chosen color on the screen.

.

Compass check

CAUTION

The "Compass check" mode will be displayed on the
multi-centre display but will not be accessible due to not
being available on vehicle.

.

Vehicle check

1. Choose "vehicle check" from the service mode start-up

screen by pressing function button switch 2, and then
execute a check by pressing function button switch 3.

CHECK
ITEM

DISPLAY CONTENT OR

CONDITION

M bus and
CAN bus
communicat
ions

• OK

• NG

OK:

−

NG: Open circuit, or

communication error
caused by failure in
relevant unit(s)

Communication check result

M-BUS : OK

CAN-BUS : OK

AC208700AB

BACK

ENTER

Service mode

1. Communication check

2. Monitor check

3. Compass check

4. Vehicle check

5. Auto check

AC208701AB

Color

Gray

White

Black

AC208702AB

BACK

ENTER

Service mode

1. Communication check

2. Monitor check

3. Compass check

4. Vehicle check

5. Auto check

AC208705AB