Symptom Troubleshooting

Audio System Symptom Troubleshooting - USB input sound is low or cannot be heard

USB input sound is low or cannot be heard (with navigation)

NOTE:

- Check the vehicle battery condition first Battery Test.
- Check the connectors for poor connections or loose terminals.
- Not all players and player functions work with the USB adapter. Always test the clients USB device in a known-good vehicle of the same year and trim (if possible). Technologies change and are updated frequently which may result in that USB devices may work in newer vehicles, but not in older vehicles of the same model.

1. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

2. Do the Speaker Check Mode with the Self-Diagnostic Function.

Do all speakers make a sound?

YES -

Go to step 3.

NO -

Go to No sound is heard from the speaker(s) (display is normal) troubleshooting Symptom Troubleshooting.

3. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

4. On the client's vehicle, connect the client's USB device to the USB port.

5. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

6. Turn on the audio system.

7. Press the HDD/AUX button until USB appears on the audio display.

8. Check if the USB device can be operated with the audio-navigation unit (Folders or Files UP/DOWN, etc.).

Can you operate the USB device, but there is no sound heard?

YES -

Go to step 9.

NO -

If the sound is normal, the USB device is OK at this time. If the USB device cannot be operated, go to USB device does not function troubleshooting Symptom Troubleshooting.

9. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

10. Connect the client's USB device to a known-good vehicle (same year/trim) that is equipped with a USB adapter, and check the USB device operation.

Is the USB device working properly in the known-good vehicle?

YES -

Substitute a known-good audio-navigation unit (including the HDD) Audio-Navigation Unit Removal/Installation, and recheck. If the symptom/indication goes away, replace the original audio-navigation unit Audio-Navigation Unit Removal/Installation.

NO -

USB device is faulty or not compatible. Also check the USB adapter and USB adapter connector condition.