Inspection Procedure 6: The Sound of External Input are not Played.


caution Before replacing the radio and CD layer, ensure that the power supply circuit, the earth circuit and the communication circuit are normal.






COMMENTS ON TROUBLE SYMPTOM



PROBABLE CAUSES



  • The audio adapter may be defective.
  • The radio and CD player may be defective.
  • Damaged harness wires and connectors

DIAGNOSIS

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 external sounds input mode.
Check if the radio and CD player is switched to the external sounds input mode.

Q. Is the check result normal?
Go to Step 3.
Switch to the external sounds input mode.

STEP 3. Check the audio adapter.
Check if the audio adapter works normally.(Refer to )

Q. Is the check result normal?
Go to Step 4.
Replace the Audio adapter.

STEP 4. Connector check: C-120 audio adapter connector and C-105 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-120 audio adapter connector terminal No. 5, 4, 6 and C-105 radio and CD player connector terminal No. 14, 13, 4.

  • Check the communication lines for open circuit or short circuit.

Q. Is the check result normal?
Replace the audio adapter, then go to Step 6.
Repair the wiring harness.

STEP 6. Check of the troubles
Check that the external input is normal.

Q. Is the check result normal?
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction ).
Replace the radio and CD player.