Mitsubishi Lancer (4A9 engine). Manual - part 187

MITSUBISHI MULTI COMMUNICATION SYSTEM (MMCS)

CHASSIS ELECTRICAL

54A-410

DIAGNOSIS PROCEDURE

STEP 1. Confirmation in MMCS service mode
Perform "Network/Connect Line Check" in the 
MMCS service mode to check that the communica-
tion and wire connection with the GPS Receiver are 
OK. (Refer to .)

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Go to Step 2.

STEP 2. Check for the vehicle's current position.
Check that the vehicle is parked at the place without 
the shield.

Q: Is the vehicle parked on a well-ventilated place?

YES : 

Go to Step 3.

NO : 

Move the vehicle to the place without the 
shield.

STEP 3. Confirming GPS signal reception
(1) Start the multivision display.

(2) Press the [INFO] button.
(3) Select [Vehicle Position].
(4) Wait for 5 minutes, and then check whether GPS 

signal can be received.

Q: Can GPS signal be received?

YES : 

The diagnosis is complete. (There is no 

failure)

NO : 

Go to Step 4.

STEP 4. Substitute a known good multivision 
display, and check the trouble symptom.
(1) Temporarily replace the multivision display.
(2) Start the multivision display.
(3) Press the [INFO] button.
(4) Select [Vehicle Position].
(5) Check if the GPS signals are being received after 

5 minutes have elapsed.

Q: Is the check result normal?

YES : 

Replace the multivision display.

NO : 

Replace the GPS antenna.

Inspection Procedure 7: GPS signal can not be received. <Vehicles for RUSSIA>

CAUTION

Whenever the multivision display is replaced, 
ensure that the power supply circuit and the 
earthing circuit are normal. (Check that the volt-
age is 10 V or more.)
COMMENTS ON TROUBLE SYMPTOM
The GPS antenna or the multivision display may be 
defective.

PROBABLE CAUSES

• Malfunctions of GPS antenna

• Malfunctions of multivision display

DIAGNOSIS PROCEDURE

STEP 1. Confirmation in MMCS service mode
Perform "Network/Connect Line Check" in the 
MMCS service mode to check that the communica-
tion and wire connection with the GPS antenna are 
OK. (Refer to .)

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Go to Step 4.

STEP 2. Check for the vehicle's current position.
Check that the vehicle is parked on a well-ventilated 
place.

Q: Is the vehicle parked on a well-ventilated place?

YES : 

Go to Step 3.

NO : 

Move the vehicle to a well-ventilated area.

MITSUBISHI MULTI COMMUNICATION SYSTEM (MMCS)

CHASSIS ELECTRICAL

54A-411

STEP 3. Confirming GPS signal reception
(1) Start the multivision display.

(2) Press the (1).

(3) Select (2).

(4) Wait for 5 minutes, and then check whether GPS 

signal can be received.

Q: Can GPS signal be received?

YES : 

The diagnosis is complete. (There is no 

failure)

NO : 

Go to Step 4.

STEP 4. Substitute a known good multivision 
display, and check the trouble symptom.
(1) Temporarily replace the multivision display.
(2) Start the multivision display.

(3) Press the (1).

(4) Select (2).

(5) Wait for 5 minutes, and then check whether GPS 

signal can be received.

Q: Is the check result normal?

YES : 

Replace the multivision display.

NO : 

Replace the GPS antenna.

Inspection Procedure 8: CD/DVD cannot be played.

CAUTION

Whenever the multivision display is replaced, 
ensure that the power supply circuit and the 
earthing circuit are normal. (Check that the volt-
age is 10 V or more.)

COMMENTS ON TROUBLE SYMPTOM
The CD/DVD or the multivision display may be 
defective.

PROBABLE CAUSES

• Defective CD/DVD

AC804201

(1)

AB

AC803907

AB

(2)

AC803908

AC804201

(1)

AB

AC803907

AB

(2)

AC803908

MITSUBISHI MULTI COMMUNICATION SYSTEM (MMCS)

CHASSIS ELECTRICAL

54A-412

• Malfunctions of multivision display

DIAGNOSIS PROCEDURE

STEP 1. Check if the error message is displayed 
on the monitor.
(Refer to .)

Q: Is the error message displayed on the monitor?

YES  : 

Refer to error massage (refer to ), take 

necessary steps. If the CD or DVD is still not 
be played, go to Step 2.

NO : 

Go to Step 2.

STEP 2. Check the CD/DVD insertion surface.
Check that the CD/DVD is inserted with the correct 
surface facing up.

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Check the disc insertion surface, and 
reinsert the disc. (In case of a single-sided 
disc, insert it with its label facing upward.)

STEP 3. Check the CD/DVD.

• Check that the DVD has the correct region code.

• Check that the CD conforms to multivision dis-

play standards .

Q: Is the check result normal?

YES : 

Go to Step 4.

NO : 

Use a DVD with a correct region code. Or, 
use a CD conforming to multivision display 
standards.

STEP 4. Check the CD/DVD.
Check that the CD /DVD is free of dirt or scratch.

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Clean the disc, use a disc without scratches 
and burrs, or remove the burrs from the 
disc, and then reinsert the disc.

STEP 5. Temporarily replace the CD/DVD with 
another CD or DVD, and check the trouble 
symptom.
Check that the new CD/DVD is played normally 
when it is inserted.

Q: Is the check result normal?

YES : 

Replace the used CD/DVD.

NO : 

Go to Step 6.

STEP 6. Check the service data log for the MMCS 
service mode.
(1) Display the service data log for the MMCS 

service mode. (Refer to .)

(2) Check if the service data log for drive and 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 7.

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

Abnormalities relating to high or low 
temperature may be present. Check that the 
multivision display can play the disc at the 
operable temperature. If it cannot be played 
normally, go to Step 7.

NO : 

Go to Step 7.

STEP 7. Perform "Network/Connect Line Check" 
in the MMCS service mode.
(1) Display "Network/Connect Line Check" in the 

MMCS service mode. (Refer to .)

(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 8.

NO  : 

Replace the multivision display.

STEP 8. Check of the troubles
Check that the new CD/DVD is played normally 
when it is inserted.

Q: Is the check result normal?

YES : 

The diagnosis is complete.

NO : 

Go to Step 9.

STEP 9. Temporarily replace the multivision 
display, and check the trouble symptom.
After temporary replacement of the multivision dis-
play, check that the new CD/DVD is played normally 
when it is inserted.

Q: Is the check result normal?

YES : 

Replace the multivision display.

NO : 

Replace the CD/DVD.

MITSUBISHI MULTI COMMUNICATION SYSTEM (MMCS)

CHASSIS ELECTRICAL

54A-413

Inspection Procedure 9: Image of a DVD is played, but no sound is played.

CAUTION

Whenever the multivision display is replaced, 
ensure that the power supply circuit and the 
earthing circuit are normal. (Check that the volt-
age is 10 V or more.)
COMMENTS ON TROUBLE SYMPTOM
The DVD or the multivision display may be defective.

PROBABLE CAUSES

• Defective DVD

• Malfunctions of multivision display

DIAGNOSIS PROCEDURE

STEP 1. Check if the error message is displayed 
on the monitor.
(Refer to .)

Q: Is the error message displayed on the monitor?

YES  : 

Refer to error massage (refer to ), take 

necessary steps. If the CD or DVD is still not 
be played, go to Step 2.

NO : 

Go to Step 2.

STEP 2. Check whether other sounds are 
emitted.
Check whether sound other than DVD is emitted.
(1) Check if the sound is output when the music 

server is used.

(2) Check if the sound is output when the radio is 

used.

(3) Check if the sound is output when the CD is 

used.

Q: Is sound other than DVD emitted?

YES : 

Go to Step 3.

NO : 

Troubleshoot the MMCS. (Refer to .)

STEP 3. Check a DVD to be inserted.
Check if the sound is recorded in the DVD, using 
other DVD players.

Q: Is sound data recorded in the DVD?

YES : 

Go to Step 4.

NO : 

Use a DVD containing sound data.

STEP 4. Check the DVD.
Check that the DVD is free of dirt or scratch.

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Clean the disc, use a disc without scratches 
and burrs, or remove the burrs from the 
disc, and then reinsert the disc.

STEP 5. Temporarily replace the DVD with 
another DVD, and check the trouble symptom.
Check if the DVD is played normally when it is 
inserted.

Q: Is the check result normal?

YES : 

Replace the used DVD.

NO : 

Go to Step 6.

STEP 6. Check the service data log for the MMCS 
service mode.
(1) Display the service data log for the MMCS 

service mode. (Refer to .)

(2) Check if the service data log for drive and 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 7.

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

Abnormalities relating to high or low 
temperature may be present. Check that the 
multivision display can play the disc at the 
operable temperature. If it cannot be played 
normally, go to Step 7.

NO : 

Go to Step 7.

STEP 7. Perform "Network/Connect Line Check" 
in the MMCS service mode.
(1) Display "Network/Connect Line Check" in the 

MMCS service mode. (Refer to .)

(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 8.

NO  : 

Replace the multivision display.

STEP 8. Check of playing method
Check whether the disc 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 is played nor-
mally when it is inserted.

Q: Is the check result normal?