Inspection Procedure 6: Voice guide "Unable to obtain vehicle speed. Please try again or contact your dealer for service" is sent from the speaker <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.

COMMENTS ON TROUBLE SYMPTOM

If the voice guide "Unable to obtain vehicle speed. Please try again or contact your dealer for service" is sent from the speaker, the vehicle speed signal of hands free-ECU has a problem. At this time, the hands free-ECU, and the vehicle speed signal of multivision display may have a problem.

PROBABLE CAUSES

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

DIAGNOSIS PROCEDURE

STEP 1. Check the multivision display operation.

Check if the speed compensated volume function of multivision display works normally during driving.

Q. Is the check result normal?

	Go to Step 2

	Troubleshoot the multivision display (Refer to ).

STEP 2. M.U.T.-III CAN bus diagnostics

Use the M.U.T.-III to diagnose the CAN bus lines.

Q. Is the check result normal?

	Go to Step 3.

	Repair the CAN bus line (Refer to GROUP 54C - Troubleshooting ).

STEP 3. M.U.T.-III other system diagnosis code

Check again if the diagnosis code is set to the multivision display.

Q. Is the diagnosis code set?

	Troubleshoot the multivision display (Refer to ).

	Go to Step 4.

STEP 4. Check the diagnosis mode

Check if the hands free-ECU can be switched to the diagnosis mode.(Refer to

Q. Is the check result normal?

	Go to Step 5

	Perform Inspection Procedure 5: "DIAGNOSIS MODE cannot be made an entry." (Refer to .)

STEP 5. 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.