Inspection Procedure 7: Voice guide "Unable to obtain vehicle speed. Please try again or contact your dealer for service" is sent from the speaker

caution

Before replacing the hands free-ECU or radio and CD player, 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 radio and CD player or multivision display may have a problem.

PROBABLE CAUSES

The hands free-ECU may be defective.
The radio and CD player may be defective. <Vehicles with radio and CD player>
The multivision display may be defective. <Vehicles with MMCS>
Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

STEP 1. Check the radio and CD player or multivision display operation.

Check if the speed compensated volume function of radio and CD player or multivision display works normally during driving.

Q. Is the check result normal?

Go to Step 2.

Troubleshoot the radio and CD player or multivision display.

STEP 2. Check the diagnosis mode.

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

<Vehicles with 1CD audio> or

<Vehicles with display audio> or

<Vehicles with MMCS>.)

Q. Is the check result normal?

Go to Step 3.

Perform Inspection Procedure 5: DIAGNOSIS MODE cannot be made an entry. Mobile Phone item is not displayed (Refer to

STEP 3. Replace the hands free-ECU temporarily, and check the trouble symptom.

Q. Is the check result normal?

Replace the hands free-ECU.

Replace the radio and CD player or multivision display.