Symptom Troubleshooting

Symptom Troubleshooting: USB device does not function

USB device does not function (with navigation)

NOTE:

- Check the vehicle battery condition first.

- Check the connectors for poor connections or loose terminals.

- Check the USB device requirement:
- Mass-storage class ready digital audio player with USB 2.0 port

- More than 256 MB of RAM

- Support 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. Always test the customers USB device in a known-good vehicle of the same year and trim (if possible). Technologies change and are updated frequently which may result that USB devices may work in newer vehicles, but not in order 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 navigation display?
YES - Go to step 4.

NO - Go to step 17.


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, and check the USB device operation.

Is the USB device working properly in the known-good vehicle?
YES - Go to step 6.

NO - If the audio-navigation unit displays UNSUPPORTED or MEDIA ERROR, the USB device may not be unsupported or is defective. If the audio-HVAC displays USB NO MUSIC, the USB device may have no music files or wrong type music files are on the device.


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

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 cable and USB adapter for wear.

NO - Go to step 10.


10. Check the navigation system for hard error codes. How To Troubleshoot The Navigation System (With Navigation)

Are there any DTC's related to the audio or XM systems?
YES - Do the appropriate DTC troubleshooting in the navigation section, and recheck.

NO - Go to step 11.


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

12. On the customer's vehicle, remove the USB adapter.

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

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

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

16. Check for continuity between terminals of USB adapter connector B (5P) and the USB adapter 5P connector according to the table.





Is there continuity?
YES - Substitute a known-good USB adapter cable, and recheck. If the symptom/indication goes away, replace the original USB adapter cable. If the symptom/indication still present, go to step 18.

NO - There is an open in the wire(s) between the USB adapter unit and the USB adapter. Replace the affected shielded harness.






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

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

Is there battery voltage?
YES - Go to step 19.

NO - Repair open in the wire between the No. 9 (10 A) fuse in the under-hood fuse/relay box and XM receiver connector A (14P) terminal No. 1.






19. Measure the voltage between body ground and USB adapter unit connector A (14P) terminal No. 2.

Is there battery voltage?
YES - Go to step 20.

NO - Substitute a known-good USB adapter unit, USB Adapter Unit Replacement (With Navigation) and recheck.






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

21. Measure the voltage between body ground and USB adapter unit connector A (14P) terminal No. 2.

Is there about 0.1 V?
YES - Go to step 25.

NO - Go to step 22.






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

23. Disconnect USB adapter unit connector A (14P) and audio-navigation unit connector D (14P).

24. Check for continuity between USB adapter unit connector A (14P) terminal No. 2 and audio-navigation unit connector D (14P) terminal No. 2.

Is there continuity?
YES - Substitute a known-good audio-navigation unit, Audio-Navigation Unit Removal/Installation (With Navigation) reconnect all the connectors, and recheck.

NO - Repair the open on the wire between the USB adapter unit and the audio-navigation unit.






25. Measure the voltage between USB adapter unit connector A (14P) terminal No. 11 and body ground.

Is there less than 0.1 V?
YES - Go to step 26.

NO - Repair open in the wire between the USB adapter unit connector A (14P) terminal No. 11 and body ground (G503).






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

27. Disconnect USB adapter unit connector A (14P) and audio-navigation unit connector D (14P).

28. Check for continuity between terminals of audio-navigation unit connector D (14P) and USB adapter unit connector A (14P) according to the table.





Is there continuity?
YES - Substitute a known-good USB adapter unit, then reconnect all of the connectors, and recheck. If the symptom/indication goes away, replace the original USB adapter unit. If the symptom/indication is still present, replace the audio-navigation unit. Audio-Navigation Unit Removal/Installation (With Navigation)

NO - Open in the wire(s) between the audio-navigation unit and the USB adapter unit. Replace the affected shielded harness.