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Symptom Troubleshooting




Audio System Symptom Troubleshooting - USB device does not function

USB device does not function (with navigation)

NOTE:

- Check the vehicle battery condition first Testing and Inspection.
- Check the connectors for poor connections or loose terminals.
- Check the USB device compatibility.
- Mass-storage class ready digital audio player with USB 2.0 port
- More than 256 MB of RAM
- Supports MP3, WMA, and AAC (encoded with the i-Tunes) files, DRM files are not supported
- Not all players and player functions work with the USB adapter. Please see the owner's manual for more information. Always test the customer's 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).

2. Turn on the audio system.

3. Press the AUX button to select USB mode.

NOTE: Do not connect the USB device.

Is USB NO DATA displayed in the audio-HVAC display?

YES -

Go to step 4.

NO -

Go to step 19.

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

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

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

YES -

Go to step 6.

NO -

If UNSUPPORTED is displayed in the audio-HVAC display, the USB device may not be supported or the wrong type music files are on the device. If USB NO SONG is displayed in the audio-HVAC display, the USB device may have no music files. See the owner's manual for details on USB device requirements and approved file types.�

6. On the customer's vehicle, connect the customer's USB device to the USB port.

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

8. Turn on the audio system.

9. Check the USB device operation in the customer's vehicle.

Does the USB device work properly in the customer's vehicle?

YES -

The system is OK at this time. Inspect the connectors of the USB device, USB port and USB adapter for wear.�

NO -

Go to step 10.

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

11. On the customer's vehicle, remove the USB device.

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

13. Check for the navigation system hard error codes.

Are there any DTC's related to the audio, XM or RES systems?

YES -

Do the appropriate DTC troubleshooting in the navigation section, and recheck.�

NO -

Go to step 14.

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

15. Disconnect USB adapter control unit connector B (5P).

16. Check for continuity between USB adapter control unit connector B (5P) and USB port 5P connector according to the table.













Is there continuity?

YES -

Go to step 20.

NO -

Go to step 17.

17. Disconnect the USB adapter 5P connector.

18. Check for continuity between USB adapter 5P connector and USB port 5P connector according to the table.













Is there continuity?

YES -

Replace the USB main harness, then recheck.�

NO -

Replace the USB adapter, then recheck.�

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

20. Measure the voltage between USB adapter control unit connector A (14P) terminal No. 1 and body ground.





Is there battery voltage?

YES -

Go to step 23.

NO -

Go to step 21.

21. Disconnect these items:

- Audio unit connector C (14P)
- USB adapter control unit connector A (14P)
- XM receiver connector A (14P)

22. Check for continuity between USB adapter control unit connector A (14P) terminal No. 1 and audio unit connector C (14P) terminal No. 1.





Is there continuity?

YES -

Replace the audio unit Audio Unit Removal/Installation.�

NO -

Repair an open in the wire between the USB adapter control unit and the audio unit.�

23. Disconnect these items:

- Audio unit connector C (14P)
- USB adapter control unit connector A (14P)
- XM receiver connector A (14P)

24. Check for continuity between USB adapter control unit connector A (14P) terminal No. 11 and audio unit connector C (14P) terminal No. 11.





Is there continuity?

YES -

Go to step 25.

NO -

Repair an open in the wire between the USB adapter control unit and the audio unit.�

25. Check for continuity between USB adapter control unit connector A (14P) terminal No. 2 and body ground.





Is there continuity?

YES -

Repair a short to body ground in the wire between the USB adapter control unit and the audio unit.�

NO -

Go to step 26.

26. Check for continuity between USB adapter control unit connector A (14P) terminal No. 2 and audio unit connector C (14P) terminal No. 2.





Is there continuity?

YES -

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

NO -

Repair an open in the wire between the USB adapter control unit and the audio unit.�

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