Inspection Procedure 2: The USB memory device data cannot be replayed. <Vehicles with radio and CD player>


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


COMMENTS ON TROUBLE SYMPTOM



note Before troubleshooting, check that the music file (the customer tried to replay) can be replayed.

PROBABLE CAUSES



  • The radio and CD player may be defective.
  • The hands free ECU may be defective.
  • The USB cable may be defective.
  • Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

STEP 1. Check the radio and CD player operation.
Check if the radio and CD player work normally and the sound is output.

Q. Is the check result normal?
Go to Step 2.
Troubleshoot the radio and CD player. Refer to .

STEP 2. 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 3.
Perform Inspection Procedure 5 "DIAGNOSIS MODE cannot be made an entry." (Refer to .)

STEP 3. Check the USB cable.
Check that the USB cable is connected to the hands free ECU normally. Or check the USB cable for damage such as bend.

Q. Is the check result normal?
Go to Step 4.
Replace or repair the USB cable.

STEP 4. Connector check: C-173 hands free ECU connector, C-126 radio and CD player connector

Q. Is the check result normal?
Go to Step 5.
Repair the defective connector.

STEP 5. Check the wiring harness between C-173 hands free ECU connector terminal No.8, 22, 23 and C-126 radio and CD player connector terminal No. 24, 23, 34.

  • Check the signal lines for open circuit and short circuit.

Q. Is the check result normal?
Go to Step 6.
Repair the wiring harness.

STEP 6. Replace the hands free ECU temporarily, and check the trouble symptom.
Replace the hands free ECU temporarily, and check that the sound is output from the speaker.

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