Mitsubishi L200. Manual - part 733

MITSUBISHI MULTI COMMUNICATION SYSTEM (MMCS)

CHASSIS ELECTRICAL

54A-299

CONSTRUCTION DIAGRAM

AC903661

Multivision display

Radio antenna (

Roof antenna)

Steering wheel audio remote
control switch

Tweeter

Front door speaker

Rear door speaker

Audio amplifier

AB

GPS antenna

Audio and video adapter

MITSUBISHI MULTI COMMUNICATION SYSTEM (MMCS)

CHASSIS ELECTRICAL

54A-300

SPECIAL TOOLS

M1540200300233

TROUBLESHOOTING

STANDARD FLOW OF DIAGNOSTIC 
TROUBLESHOOTING

M1544004800669

Refer to GROUP 00 

− Contents of troubleshooting .

PRECAUTIONS ON SERVICING MMCS

M1546003000150

PRIOR TO DISCONNECTING THE VEHI-
CLE BATTERY

The MMCS stores a lot of information which your 
customer registers in its memory. All of this informa-
tion will be cleared when the battery terminals are 
disconnected. Therefore, the preset channels must 
be stored before the vehicle battery is disconnected. 
Vehicle's current position and destinations must be 
stored if the vehicle battery remains disconnected for 
long periods.

DIAGNOSIS TIPS CONCERNING THE 
ENTIRE SYSTEM

1. If at least two system functions are defective at 

the same time, it is possible that communication 
between the system components is abnormal. 
Check the system using the communication and 
wire connection check in the service mode.

2. If an error is displayed, check that relevant wiring 

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

3. If the wiring harness connectors are engaged 

correctly, check the wiring harness. If the wiring 
harness is in good condition, replace relevant 
component(s). Now the error code and the serv-
ice mode data must be stored.

NOTE: If a system communication related failure is 
suspected, diagnose the system.

DIAGNOSIS TIPS CONCERNING THE 
NAVIGATION FUNCTION

1. The precision of the GPS positioning is limited 

due to its operation principles. So, some of cus-
tomer reports do not mean that the system is 
defective.

Tool

Number

Name

Use

MB991223

a: MB991219
b: MB991220
c: MB991221
d: MB991222

Harness set

a: Test harness
b: LED harness
c: LED harness 

adapter

d: Probe

Making voltage and resistance 
measurements during 
troubleshooting

a: Connect pin contact pressure 

inspection

b: Power circuit inspection
c: Power circuit inspection
d: Commercial tester connection

MB992006

Extra fine probe

Continuity check and voltage 
measurement at harness wire or 
connector

MB991223

a

d

c

b

DO NOT USE

BA

MB992006

MITSUBISHI MULTI COMMUNICATION SYSTEM (MMCS)

CHASSIS ELECTRICAL

54A-301

Prior to troubleshooting, interrogate your customer 

about how the navigation system is used and 
where he/she drives. If you determine that the 
system is OK, explain to your customer about 
how the system works and how the customer 
should operate it.

2. If the system is not OK, diagnose the system 

according to the trouble symptom chart.

ERROR MESSAGE

M1546023500254

When the multivision display detects its own uninten-
tional operation or malfunction in the loaded disc, it 
displays the following error messages.

AC804184

The unit too hot. Please wait...

AB

ERROR MESSAGE SAMPLE

<English>

<Russian>

Error contents

Cause

Action

Malfunction of 
multivision display 
by high temperature

The inside temperature of the 
multivision display is 75

°C or 

more.

Wait until the temperature drops to the operable 
temperature. After the temperature drops, the 
error message display is terminated, and then 
returns to the screen before the error message 
display.

AC804184

The unit too cold Please wait...

AC

ERROR MESSAGE SAMPLE

<English>

<Russian>

Error contents

Cause

Action

Malfunction of 
multivision display 
by low temperature

The inside temperature of the 
multivision display is 

−20°C or 

less.

Wait until the temperature rises to the operable 
temperature by working the air conditioner. After 
the temperature rises, the error message display 
is terminated, and the screen returns to the status 
before displaying the error message.

MITSUBISHI MULTI COMMUNICATION SYSTEM (MMCS)

CHASSIS ELECTRICAL

54A-302

AC804210

 It is difficult to read the hard disk. Wait
for a while unit the hard disk is restored.

ERROR MESSAGE SAMPLE

<English>

<Russian>

 It is difficult to read the hard disk. Wait
for a while unit the hard disk is restored.

Soon,Restart...

AC

(1)

After HDD was checked automatically.

After HDD was checked automatically.

Error contents

Cause

Action

Malfunction of HDD 
by vibration

Severe vibration is applied to the 
multivision display, and the 
reading of the HDD data is 
prohibited.

When the multivision display confirms the HDD 
data reading availability, it restarts automatically. 
Check if the multivision display is securely 
installed to the vehicle body.

HDD Partition Error System malfunction occurs to the 

HDD inside the multivision display.

The multivision display checks HDD 
automatically. (1) is displayed after the 
completion of the check. Select (1) to restart the 
multivision display. If it does not restart, turn the 
ignition switch to the OFF position to turn off the 
power supply, and then turn the ignition switch to 
the ON position to restart. After the restart, check 
that the OK is displayed for the HDD Drive in the 
"Network/Connect Line Check" of the MMCS 
service mode. If not, replace the multivision 
display.

AC804184 AK

ERROR MESSAGE SAMPLE

<English>

<Russian>

Please check the disk.