Inspection Procedure 5: DIAGNOSIS MODE cannot be made an entry. Mobile Phone item is not displayed on the MENU screen of audio. <Vehicles with MMCS>

caution Before replacing the hands free-ECU or multivision display, ensure that the power supply circuit, the earth circuit and the communication circuit are normal.


If the diagnosis mode cannot be made an entry, the hands free-ECU, the communication between the hands free-ECU and the multivision display, or the power supply system of hands free-ECU may have a problem.


  • The hands free-ECU may be defective.
  • The multivision display may be defective.
  • Damaged harness wires and connectors


STEP 1. Check the multivision display operation.

Check if the multivision display work normally and the sound is output.

Q. Is the check result normal?

Go to Step 2
Troubleshoot the multivision display. (Refer to .)

STEP 2. Check of short to power supply, short to earth, and open circuit in IE+, IE- line between hands free-ECU connector and multivision display connector.

Q. Is the check result normal?

Go to Step 3
Repair the connector(s) or wiring harness.

STEP 3. Check if the power supply circuit of hands free-ECU have a problem.

Perform the Inspection procedure 1 "Check the hands free-ECU power supply circuit." of the troubleshooting. (Refer to .)

Q. Is the check result normal?

Go to Step 4
Repair according to the troubleshooting for reference.

STEP 4. Replace the hands free-ECU temporarily, and check the trouble symptom.

Q. Is the check result normal?

Replace the hands free-ECU.
Replace the multivision display.