Inspection Procedure 4: When the speech switch is pressed, the voice guide is not output. <Vehicles with radio and CD player>


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 is not sent when the steering wheel remote control switch (speech switch) is pushed, the communication between the radio and CD player and the hands free-ECU, or the communication between the radio and CD player and the steering wheel remote control switch, the hands free-ECU or the steering wheel remote control switch may have a problem.

PROBABLE CAUSES

  • The radio and CD player may be defective.
  • The hands free-ECU may be defective.
  • The steering wheel remote control switch may be defective.
  • Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

STEP 1. 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>.)

Q. Is the check result normal?
Go to Step 2
Perform Inspection Procedure 5 "DIAGNOSIS MODE cannot be made an entry." (Refer to .)

STEP 2. Operation check of the steering wheel remote control switch (audio remote control switch)
Check that the radio and CD player can be operated by the steering wheel remote control switch.

Q. Is the check result normal?
Go to Step 3
Troubleshoot the steering wheel remote control switch.

STEP 3. Check the steering wheel remote control switch (speech switch).
Check the continuity of the steering wheel remote control switch. (Refer to .)

Q. Is the check result normal?
Go to Step 4
Replace the steering wheel remote control switch.

STEP 4. Temporarily replace the hands free-ECU, and check the trouble symptom.

Q. Is the check result normal?
Replace the hands free-ECU.
Replace the radio and CD player.