Mitsubishi Outlander GS45X. Manual - part 131

MMCS

TSB Revision

CHASSIS ELECTRICAL

54A-521

STEP 2. 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 PREMIUM is displayed.
Q: Is the check result normal?

YES : Go to Step 3.
NO :  Go to Step 4.

STEP 3. 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 4.
NO :  Go to step 7.

STEP 4. 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 5.
NO :  Repair the CAN bus line.

STEP 5. 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 6.

STEP 6. 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 7.

MMCS

TSB Revision

CHASSIS ELECTRICAL

54A-522

STEP 7. Checking with speaker test.
Perform the speaker test, and check which speaker does not 
output the sound. Refer to 

P.54A-443

.

Q: Is the check result normal?

YES <normal for all> : The trouble can be an intermittent 

malfunction (Refer to GROUP 00, How to Cope with 
Intermittent Malfunction 

P.00-15

).

NO <abnormal for all> : Refer to Inspection Procedure 2 

"No sound is heard" 

P.54A-498

.

NO <only front door speaker (RH) is abnormal> : Go to 

Step 8.

NO <only front door speaker (LH) is abnormal> : Go to 

Step 14.

NO <only rear door speaker (RH) is abnormal> : Go to 

Step 20.

NO <only rear door speaker (LH) is abnormal> : Go to 

Step 24.

NO <only tweeter (RH) is abnormal> : Go to Step 28.
NO <only tweeter (LH) is abnormal> : Go to Step 32.
NO <only subwoofer is abnormal> : Go to Step 36.

STEP 8. Check front door speaker (RH) connector E-04 for 
loose, corroded or damaged terminals, or terminals 
pushed back in the connector.
Q: Is front door speaker (RH) connector E-04 in good 

condition?
YES : Go to Step 9.
NO :  Repair or replace the damaged component(s). Refer 

to GROUP 00E, Harness Connector Inspection 

P.00E-2

.

STEP 9. Check the front door speaker (RH).
(1) Remove the front door speaker (RH). Refer to 

P.54A-692

.

(2) Check that the front door speaker (RH) outputs the noise 

when five volts are applied to the front door speaker (RH) 
connector terminal.

Q: Does the front door speaker (RH) output the noise?

YES : Go to Step 10.
NO :  Replace the front door speaker (RH).

AC703723AB

5 volts

MMCS

TSB Revision

CHASSIS ELECTRICAL

54A-523

STEP 10. Check audio amplifier connector D-126 for loose, 
corroded or damaged terminals, or terminals pushed back 
in the connector.
Q: Is audio amplifier connector D-126 in good condition?

YES : Go to Step 11.
NO :  Repair or replace the damaged component(s). Refer 

to GROUP 00E, Harness Connector Inspection 

P.00E-2

.

STEP 11. Check the wiring harness between audio 
amplifier connector D-126 (terminal 27, 37) and front door 
speaker (RH) connector E-04 (terminal 1, 2).
NOTE: Also check intermediate connectors C-20 and C-112 for 
loose, corroded, or damaged terminals, or terminals pushed 
back in the connector. If intermediate connector C-20 or C-112 
is damaged, repair or replace the connector as described in 
GROUP 00E, Harness Connector Inspection 

P.00E-2

.

• Check the communication lines for open circuit and short 

circuit.

Q: Is the wiring harness between audio amplifier connector 

D-126 (terminal 27, 37) and front door speaker (RH) 
connector E-04 (terminal 1, 2) in good condition?
YES : Go to Step 12.
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 12. Check multivision display connector C-10 and 
audio amplifier connector D-127 for loose, corroded or 
damaged terminals, or terminals pushed back in the 
connector.
Q: Are multivision display connector C-10 and audio 

amplifier connector D-127 in good condition?
YES : Go to Step 13.
NO :  Repair or replace the damaged component(s). Refer 

to GROUP 00E, Harness Connector Inspection 

P.00E-2

.

MMCS

TSB Revision

CHASSIS ELECTRICAL

54A-524

STEP 13. Check the wiring harness between multivision 
display connector C-10 (terminal 7, 15) and audio amplifier 
connector D-127 (terminal 11, 10).
NOTE: Also check intermediate connectors C-17 and C-22 for 
loose, corroded, or damaged terminals, or terminals pushed 
back in the connector. If intermediate connector C-17 or C-22 is 
damaged, repair or replace the connector as described in 
GROUP 00E, Harness Connector Inspection 

P.00E-2

.

• Check the communication lines for open circuit and short 

circuit.

Q: Is the wiring harness between multivision display 

connector C-10 (terminal 7, 15) and audio amplifier 
connector D-127 (terminal 11, 10) in good condition?
YES : Check the trouble symptom, and go to Step 40.
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 14. Check front door speaker (LH) connector E-17 for 
loose, corroded or damaged terminals, or terminals 
pushed back in the connector.
Q: Is front door speaker (LH) connector E-17 in good 

condition?
YES : Go to Step 15.
NO :  Repair or replace the damaged component(s). Refer 

to GROUP 00E, Harness Connector Inspection 

P.00E-2

.

STEP 15. Check the front door speaker (LH).
(1) Remove the front door speaker (LH). Refer to 

P.54A-692

.

(2) Check that the front door speaker (LH) outputs the noise 

when five volts are applied to the front door speaker (LH) 
connector terminal.

Q: Does the front door speaker (LH) output the noise?

YES : Go to Step 16.
NO :  Replace the front door speaker (LH).

STEP 16. Check audio amplifier connector D-126 for loose, 
corroded or damaged terminals, or terminals pushed back 
in the connector.
Q: Is audio amplifier connector D-126 in good condition?

YES : Go to Step 17.
NO :  Repair or replace the damaged component(s). Refer 

to GROUP 00E, Harness Connector Inspection 

P.00E-2

.

AC703723AB

5 volts