Mitsubishi Outlander GS45X. Manual - part 124

MMCS

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CHASSIS ELECTRICAL

54A-493

STEP 12. Check the wiring harness between ETACS-ECU 
connector C-309 (terminal 2) and fusible link (37)

• Check the power supply line for open circuit and short cir-

cuit.

Q: Is the wiring harness between ETACS-ECU connector 

C-309 (terminal 2) and fusible link (37) in good 
condition?
YES : Go to Step 13.
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 13. Check ETACS-ECU connector C-315 for loose, 
corroded or damaged terminals, or terminals pushed back 
in the connector.
Q: Is ETACS-ECU connector C-315 in good condition?

YES : Go to Step 14.
NO :  Repair or replace the damaged component(s). Refer 

to GROUP 00E, Harness Connector Inspection 

P.00E-2

. The steering remote control switch should 

work normally.

STEP 14. Check the wiring harness between multivision 
display connector C-10 (terminal 14) and ETACS-ECU 
connector C-315 (terminal 9).

• Check the power supply line for open circuit and short cir-

cuit.

NOTE: Also check intermediate connector C-17 for loose, cor-
roded, or damaged terminals, or terminals pushed back in the 
connector. If intermediate connector C-17 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 14) and ETACS-ECU connector 
C-315 (terminal 9) in good condition?
YES : Go to Step 15.
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 15. Retest the system
Check if the multivision display power is turned ON.
Q: Is the check result normal?

YES : The trouble can be an intermittent malfunction (Refer 

to GROUP 00, How to use 
Troubleshooting/inspection Service Points 

− How to 

Cope with Intermittent Malfunction 

P.00-15

).

NO :  Replace the multivision display.

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Inspection Procedure 2: No sound is heard. <Vehicles without audio amplifier>

CAUTION

Before replacing the multivision display, ensure that the power supply circuit, the ground circuit, and 
the communication circuit are normal. (Check that the voltage is 10 V or more.)

.

COMMENTS ON TROUBLE SYMPTOM

If the audio sound is not output, the multivision dis-
play, audio amplifier, or power supply circuit of audio 
amplifier may have a problem, or the option coding 
information may be inconsistent.

.

PROBABLE CAUSES

• The multivision display may be defective

• The audio amplifier may be defective

• Option coding information inconsistency

• Damaged harness wires and connectors

DIAGNOSIS

Required Special Tools:

• MB991958: Scan Tool (M.U.T.-III Sub Assembly)

• MB991824: Vehicle Communication Interface (V.C.I.)

• MB991827: M.U.T.-III USB Cable

• MB991910: M.U.T.-III Main Harness A

STEP 1. Check the multivision display operation.
Q: Check the sources from which the sound is not output.

No sound only from radio : Perform Inspection Procedure 

6 "The AM/FM radio broadcasting cannot be 
received." (Refer to 

P.54A-537

.)

No sound only when the CD is played : Perform 

Inspection Procedure 8 "CD/DVD cannot be Played." 
(Refer to 

P.54A-539

.) 

No sound only when the DVD is played : Perform 

Inspection Procedure 8 "CD/DVD cannot be 
Played."(Refer to 

P.54A-539

.) or Inspection 

Procedure 9 "Image of a DVD is Played, but no 
Sound is Played." (Refer to 

P.54A-541

.)

No sound only when the music server is used : Go to 

Step 8.

No sound from any of the sources : Go to Step 2.

MMCS

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STEP 2. Check the ETACS-ECU coding data.
Use scan tool MB991958 to diagnose the CAN bus lines.

CAUTION

To prevent damage to scan tool MB991958, always turn the 
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958. Refer to "How to connect the 

Scan Tool (M.U.T.-III) 

P.54A-458

."

(2) Turn the ignition switch to "ON" position.
(3) Operate the scan tool MB991958 to read the ETACS-ECU 

option coding information (Refer to GROUP 00, Coding 
Table 

P.00-44

).

(4) Check that the "Number of speaker" is set to "6 speakers".
Q: Is the check result normal?

YES : Go to Step 3.
NO :  Operate scan tool MB991958 to set the option coding 

"Number of speaker" to "6 speakers," and check the 
trouble symptom.

STEP 3. Check the MMCS service mode, CAN 
communication confirmation, and coding data.
(1) Display the CAN Communication Confirmation and Coding 

Data of the MMCS service mode. (Refer to 

P.54A-443

)

(2) Check if "6 SPEAKER (2 TWEETER)" is displayed as the 

number of installed speakers.

Q: Is the check result normal?

YES : Go to step 4.
NO :  Go to step 5.

STEP 4. Check the service data log for the MMCS service 
mode.
With the service data log of MMCS service mode displayed, 
check if the service data log for SP (speaker) is displayed. 
(Refer to 

P.54A-443

)

Q: Is the service data log for SP (speaker) displayed?

YES : Go to step 5.
NO :  Go to step 8.

STEP 5. Using scan tool MB991958, diagnose the CAN bus 
line.
Use scan tool MB991958 to diagnose the CAN bus lines.
(1) Turn the ignition switch to "ON" position.
(2) Diagnose the CAN bus line.
Q: Is the check result normal?

YES : Go to Step 6.
NO :  Repair the CAN bus line.

ZC501967

AC404789

AC702802

MB991824

MB991827

MB991910

Data link

connector

AB

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STEP 6. Using scan tool MB991958, read the CAN box unit 
diagnostic trouble code. 
Check again if the DTC is set to the CAN box unit.
Q: Is the DTC set?

YES : Troubleshoot the MMCS (Refer to 

P.54A-460

).

NO :  Go to Step 7.

STEP 7. Using scan tool MB991958, read the ETACS-ECU 
diagnostic trouble code.
Check if the diagnostic trouble code is set to the ETACS-ECU.
Q: Is the DTC set?

YES : Diagnose the ETACS-ECU (Refer to GROUP 54A 

− 

ETACS-ECU 

− Troubleshooting 

P.54A-732

).

NO :  Go to Step 8.

STEP 8. 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-443

)

(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.) : 

Perform Inspection Procedure 8 "CD/DVD cannot be 
Played."(Refer to 

P.54A-539

.) or Inspection 

Procedure 9 "Image of a DVD is Played, but no 
Sound is Played." (Refer to 

P.54A-541

.) Go to Step 9.

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

Abnormalities relating to high or low temperature may 
be present. Check if the multivision display can output 
the sound at the operable temperature. If it cannot 
output the sound, go to Step 9.

NO :  Go to Step 9.

STEP 9. 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-443

)

(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 11.
NO :  Go to Step 10.

STEP 10. Retest the system
Check that the audio sound is output.
Q: Is the check result normal?

YES : The trouble can be an intermittent malfunction (Refer 

to GROUP 00 

− How to use 

Troubleshooting/inspection Service Points 

− How to 

Cope with Intermittent Malfunction 

P.00-15

).

NO :  Go to step 11.