Inspection Procedure 2: No Sound is Heard. <Vehicles without Audio Amplifier>


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

COMMENTS ON TROUBLE SYMPTOM



PROBABLE CAUSES



  • Malfunctions of multivision display
  • Damaged harness wires and connectors

DIAGNOSIS PROCEDURE


STEP 1. Check the multivision display operation.


Q. Check the sources from which the sound is not output.











STEP 2. ETACS-ECU coding data check


(1)Operate the M.U.T.-III to read the ETACS-ECU option coding information (Refer to GROUP 00 - Coding Table ).
(2)Check that the "Number of speaker" is set to "6 speakers or 4 speakers".

Q. Is the check result normal?





STEP 3. Check the MMCS service mode, CAN communication confirmation and coding data


(1)Display the CAN communication confirmation and coding data for the MMCS service mode. (Refer to )
(2)Check if "6SPEAKER(2TWEETER) or 4SPEAKER" is displayed as the number of installed speakers.

Q. Is the check result normal?





STEP 4. Check the service data log for the MMCS service mode.



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





STEP 5. M.U.T.-III CAN bus diagnostics



Q. Is the check result normal?





STEP 6. Check whether the diagnosis code is set.



(1)Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
(2)Check if diagnosis code is set.

Q. Is the diagnosis code set?





STEP 7. M.U.T.-III other system diagnosis code



Q. Is the diagnosis code set?





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 )
(2)Check if the service data log for drive and HDD is displayed.

Q. Is the service data log displayed?







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

Q. Is the check result normal?





STEP 10. Check of the troubles



Q. Is the check result normal?





STEP 11. Check of the troubles



Q. Is the check result normal?