Inspection Procedure 6

INSPECTION PROCEDURE 6: The sound of external input are not played. [Vehicles with audio adapter]

CAUTION:
Before replacing the radio and CD player, ensure that the power supply circuit, the ground circuit and the communication circuit are normal.










COMMENTS ON TROUBLE SYMPTOM

If the external input sound is not output, the radio and CD player, audio communication line of radio and CD player, or audio adapter may have a problem.

PROBABLE CAUSES

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

DIAGNOSIS

STEP 1. Operation check of the radio and CD player

Check if the radio and CD player operates normally and outputs sound.

Q. Is the check result normal?

YES Go to Step 2.
NO Troubleshoot the radio and CD player (Refer to Symptom Chart).
STEP 2. Check the external sound input mode.

Check if the external sound input mode of the radio and CD player is set.

Q. Is the check result normal?

YES Go to Step 3.
NO Set the external sound input mode.
STEP 3. Check the audio adapter.

Check if the audio adapter is normal.(Refer to Audio Adapter Inspection)

Q. Is the check result normal?

YES Go to step 4.
NO Replace the Audio adapter.
STEP 4. Check audio adapter connector C-121 and radio and CD player connector C-105 for loose, corroded or damaged terminals, or terminals pushed back in the connector.

Q. Are audio adapter connector C-121 and radio and CD player connector C-105 in good condition?

YES Go to step 5.
NO Repair or replace the damaged component(s) Harness Connector Inspection).
STEP 5. Check the wiring harness between audio adapter connector C-121
(terminal 4, 6) and radio and CD player connector C-105 (terminal 13, 4).

- Check the communication lines for open circuit and short circuit.

Q. Is the wiring harness between audio adapter connector C-121 (terminal 4, 6) and radio and CD player connector C-105 (terminal 13, 4) in good condition?

YES Replace the audio adapter, and go to Step 6.
NO The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary.
STEP 6. Retest the system.

Check that the external input is normal.

Q. Is the check result normal?

YES The trouble can be an intermittent malfunction How to Cope With Intermittent Malfunctions).
NO Replace the radio and CD player.