Mitsubishi Galant 9G. Manual — part 1586

MULTI-CENTER DISPLAY

TSB Revision

CHASSIS ELECTRICAL

54A-216

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 <MIDDLE GRADE TYPE>

AC209281

FUNCTION
BUTTON
SWITCH 1

FUNCTION
BUTTON
SWITCH 2

FUNCTION
BUTTON
SWITCH 3

DISPLAY
BUTTON
SWITCH

AB

MULTI-CENTER DISPLAY (middle grade type)

AC208668

A/C DISPLAY

AMBIENT AIR TEPERATURE
DISPLAY CUSTOMIZE FUNCTION

ETACS-ECU

A/C-ECU

POWER TRAIN
CONTROL
MODULE

AMBIENT AIR
TEMPERATURE
SENSOR

COMBINATION
METER

RADIO, CD PLAYER
AND CD CHNGER

CAN-BUS

M-BUS

NULTI-CENTER DISPLAY <MIDDLE GRADE TYPE>

AB

CLOCK

COMPASS
SENSOR

SYSTEM BLOCK

COMPASS
DISPLAY

AUDIO
DISPLAY

MULTI-CENTER DISPLAY

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CHASSIS ELECTRICAL

54A-217

Communication error processing <middle grade type>

The multi-center display unit (middle grade type)
communicates with specific units via CAN and M bus
lines. If an abnormality occurs (such as communica-
tion 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 failure in the multi-center display
unit (middle grade type) itself, communication error
with relevant units, components or sensor. In this
case, you can pinpoint a trouble spot according to
the CAN communication DTC code chart.

AC209095AB

ERROR MESSAGE

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

TSB Revision

CHASSIS ELECTRICAL

54A-218

FAILURE DIAGNOSIS SERVICE MODE
FUNCTION <MIDDLE GRADE TYPE>

The multi-center display unit (middle grade type) with
the following functions for the failure diagnosis ser-
vice.

.

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-center display unit
(middle grade type). After approximately 5 seconds, the
service mode start-up screen is displayed.

.

Service mode function

CONTENTS

Service
function

Communication check

The multi-center 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-center display unit (middle grade type) and the
audio system

• Communication condition between the (middle grade

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

Monitor check

Checks whether the screen display functions.

Compass check

Checks whether the geomagnetism sensor are working
normally.

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

• Compass check

• Vehicle check

AC208698AB

MULTI-CENTER DISPLAY

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CHASSIS ELECTRICAL

54A-219

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.

5. The multi-center 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.

.

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)

BACK

ENTER

Service mode

1. Communication check

2. Monitor check

3. Compass check

4. Vehicle check

5. Auto check

AC208699

AB

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

AC208702 AB