Mitsubishi Evolution X. Manual - part 1020

MMCS

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CHASSIS ELECTRICAL

54A-441

STEP 6. Perform "Network/Connect Line Check" 
in the MMCS service mode.
(1) Display "Network/Connect Line Check" in the 

MMCS service mode. (Refer to 

P.54A-369

.)

(2) Check if "DVD Drive OK" is displayed.
(3) Check if "HDD Drive OK" is displayed.

Q: Is the check result normal?

YES  : 

Go to Step 7.

NO  : 

Go to Step 8.

STEP 7. Check the playing method.
Check whether the disk was played normally and not 
with special playback (fast rewind, fast forward, slow, 
pause). Also, check whether the mute mode was 
selected. After that, check if the DVD (video disk) is 
played normally when it is inserted.

Q: Is the check result normal?

YES : 

This diagnosis is complete.

NO : 

Go to Step 8.

STEP 8. Temporarily replace the multivision 
display, and check the trouble symptom.
After temporary replacement of the multivision dis-
play, check that the DVD (video disk) is played nor-
mally when it is inserted.

Q: Is the check result normal?

YES : 

Replace the multivision display.

NO : 

Replace the DVD (video disk).

Inspection Procedure 10: Sound of a DVD (Video Disk) can be played, but no image is played.

CAUTION

Whenever the ECU is replaced, ensure that the 
power supply circuit and the grounding circuit 
are normal. (Check that the voltage is 10 V or 
more.)

.

COMMENTS ON TROUBLE SYMPTOM

The DVD (video disk) or the multivision display may 
be defective.

.

PROBABLE CAUSES

• Defective DVD (video disk)

• The multivision display may be defective

DIAGNOSIS

STEP 1. Check the DVD (video disk).
Check that the DVD (video disk) is free of dirt or 
scratch.

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Clean the disk, use a disk without scratches 
and burrs, or remove the burrs from the 
disk. Then, reinsert the disk.

STEP 2. Temporarily replace the DVD (video disk) 
with another DVD (video disk), and check the 
trouble symptom.
Check if the new DVD (video disk) is played normally 
when it is inserted.

Q: Is the check result normal?

YES : 

Replace the used DVD (video disk).

NO : 

Go to Step 3.

MMCS

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CHASSIS ELECTRICAL

54A-442

STEP 3. Check the service data log for the MMCS 
service mode.
(1) Display the service data log for the MMCS 

service mode. (Refer to 

P.54A-369

.)

(2) Check that the service data log for drive is 

displayed.

(3) Check that the service data log for monitor is 

displayed.

(4) Check that the service data log for HDD is 

displayed.

Q: Is the service data log displayed?

YES (The service data log for drive is displayed.) : 

Check for foreign materials or condensation. 
Repair if there is an abnormality, and then 
go to Step 4. 

YES (The service data log for monitor or HDD is 
displayed.) : 

Abnormalities relating to high or low 

temperature may be present. Check if the 
DVD (video disk) image is displayed on the 
monitor within the temperature range where 
the navigation and menu screens can be 
displayed. If the image is not displayed, go 
to Step 4.

NO : 

Go to Step 4.

STEP 4. Perform "Network/Connect Line Check" 
in the MMCS service mode.
(1) Display "Network/Connect Line Check" in the 

MMCS service mode. (Refer to 

P.54A-369

.)

(2) Check if "DVD Drive OK" is displayed.
(3) Check if "HDD Drive OK" is displayed.

Q: Is the check result normal?

YES  : 

Go to Step 5.

NO  : 

Replace the multivision display.

STEP 5. Temporarily replace the multivision 
display, and check the trouble symptom.
After temporary replacement of the multivision dis-
play, check if the DVD (video disk) image is dis-
played.

Q: Is the check result normal?

YES : 

Replace the multivision display.

NO : 

Replace the DVD (video disk).

MMCS

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CHASSIS ELECTRICAL

54A-443

Inspection Procedure 11: The picture and sound of external input are not played.

CAUTION

Whenever the ECU is replaced, ensure that the power supply circuit and the grounding circuit are 
normal. (Check that the voltage is 10 V or more.)

.

COMMENTS ON TROUBLE SYMPTOM

The wiring harness between audio and video adapter 
and multivision display, audio and video adapter, or 
multivision display may have a problem.

NOTE: Problem of the device to be connected and 
the connection problem between the audio and video 
adapter and the device is suspected. Thus, check 
the operation condition and connecting method of 
the devices to be connected to the multivision display 
and audio and video adapter before diagnosis.

.

PROBABLE CAUSES

• The multivision display may be defective

• The audio and video adaptor may be defective

• Damaged harness wires and connectors

DIAGNOSIS

Required Special Tools:

• MB991223: Harness Set

• MB992006: Extra Fine Probe

Audio and Video Adapter Communication Circuit

MULTIVISION
DISPLAY

AUDIO AND
VIDEO ADAPTER

AC708951BR

Connectors: C-10, C-106, C-110, C-126

C-10 (GR)

C-106

C-110

C-126 (B)

MMCS

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CHASSIS ELECTRICAL

54A-444

STEP 1. Check of DVD picture
Check that the DVD picture is displayed normally.
Q: Is the check result normal?

YES : Go to Step 2.
NO :  Perform the troubleshooting related to the MMCS 

(Refer to 

P.54A-408

).

STEP 2. Check the audio and video adapter.
Inspect the audio and video adapter. (Refer to 

P.54A-455

.)

Q: Is the check result normal?

YES : Go to Step 3.
NO :  Replace the audio and video adapter.

STEP 3. Check multivision display connector C-10 and 
audio and video adaptor connector C-126 for loose, 
corroded or damaged terminals, or terminals pushed back 
in the connector.
Q: Are multivision display connector C-10 and audio and 

video adaptor connector C-126 in good condition?
YES : Go to Step 4.
NO :  Repair the connector concerned.

STEP 4. Check the wiring harness between multivision 
display connector C-10 (terminal 37, 53, 38, 54, 39) and 
audio and video adaptor connector C-126 (terminal 1, 2, 6, 
4, 5).

• Check the communication lines for open circuit and short 

circuit.

NOTE: Also check intermediate connectors C-106 and C-110 
for loose, corroded, or damaged terminals, or terminals pushed 
back in the connector. If intermediate connector C-106 or 
C-110 is damaged, repair or replace the connector as 
described in GROUP 00E, Harness Connector Inspection 

P.00E-2

.

Q: Is the wiring harness between multivision display 

connector C-10 (terminal 37, 53, 38, 54, 39) and audio 
and video adaptor connector C-126 (terminal 1, 2, 6, 4, 5) 
in good condition?
YES : Go to Step 5.
NO :  The wiring harness may be damaged or the 

connector(s) may have loose, corroded or damaged 
terminals, or terminals pushed back in the connector. 
Repair the wiring harness as necessary.

STEP 5. Temporarily replace the multivision display, and 
check the trouble symptom.
Check that the external input is normal.
Q: Is the check result normal?

YES : Replace the multivision display.
NO :  Replace the audio and video adapter.