USB Input Sound Is Low Or Cannot Be Heard (Without Navigation)

Audio System Symptom Troubleshooting - USB input sound is low or cannot be heard (without navigation)

USB input sound is low or cannot be heard ('10 model without navigation)

NOTE:

- Check the vehicle battery condition first Testing and Inspection.
- Check the connectors for poor connections or loose terminals.
- Not all players and player functions work with the USB adapter. Please see the owner's manual for more information.

1. Turn the ignition switch ON (II).

2. Check to see if there is a specific speaker that has no sound.

Do all speakers make a sound?

YES -

Go to step 3 USB Input Sound Is Low Or Cannot Be Heard (Without Navigation).

NO -

Go to no sound is heard from the speaker(s) No Sound Is Heard From The Speaker(s) (Display Is Normal) (Without Navigation).�

3. Turn the ignition switch to LOCK (0).

4. On the customer's vehicle, connect the customer's USB device to the USB adapter cable.

5. Turn the ignition switch to ON (II).

6. Turn on the audio unit.

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

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

Can you operate the USB device, and is the sound normal?

YES -

Intermittent failure the USB device is OK at this time.�

NO -

If you can operate the USB device, but there is no sound, go to step 9 USB Input Sound Is Low Or Cannot Be Heard (Without Navigation). If you cannot operate the USB device, go to USB device does not function USB Device Does Not Function (Without Navigation).

9. Turn the ignition switch to LOCK (0).

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

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

YES -

Go to step 11 USB Input Sound Is Low Or Cannot Be Heard (Without Navigation).

NO -

USB device is faulty. Also check the USB cord and USB adapter connector condition.�

11. Return to the customer's vehicle.

12. Remove the audio unit Audio Unit Removal/Installation, and disconnect audio unit connector E (14P).

13. Disconnect USB adapter unit connector A (14P), and XM receiver connector A (14P) (if equipped).

14. Check for continuity between body ground and audio unit connector E (14P) according to the table.









Is there any continuity?

YES -

There is a short to body ground in the wire(s) between audio unit and USB adapter unit. Replace the affected shielded harness.�

NO -

Go to step 15 USB Input Sound Is Low Or Cannot Be Heard (Without Navigation).

15. Check for continuity between the terminals of audio unit connector E (14P) according to the table.









Is there continuity between any of the terminals?

YES -

There is a short in the wire(s) between the audio unit and the USB adapter unit. Replace the affected shielded harness.�

NO -

Go to step 16 USB Input Sound Is Low Or Cannot Be Heard (Without Navigation).

16. Check for continuity between audio unit connector E (14P) and USB adapter unit connector A (14P) according to the table.









Is there continuity?

YES -

Substitute a known-good USB adapter unit USB Adapter Unit Replacement, then reconnect all of the connectors, and recheck. If the symptom/indication goes away, replace the original USB adapter unit USB Adapter Unit Replacement. If the symptom/indication is still present, replace the audio unit Audio Unit Removal/Installation.�

NO -

There is an open in the wire(s) between the audio unit and the USB adapter unit. Replace the affected shielded harness.�