Symptom Troubleshooting

Symptom Troubleshooting: USB device does not function

USB device does not function

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

- Supports MP3, WMA, and AAC (encoded with the i-Tunes) files, DRM files are not supported

1. Turn the ignition switch to ON (II), and turn on the audio unit.

2. Push the AUX button to select USB mode.
NOTE: Do not connect the USB device for this step.

Is USB NO DATA displayed?
YES - Go to step 3.

NO - Go to step 8.


3. Connect the customer's USB device to the USB adapter.

Does the USB device work properly?
YES - The USB device is OK at this time. Check for loose or poor connections at the audio unit or the navigation unit and the USB adapter unit. Also check the USB cable and the USB jack.

NO - Go to step 4.


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 an USB adapter, and check the USB device operation.

Does the USB device work properly?
YES - Go to step 6.

NO - USB device is faulty. Also check the USB cable and the USB jack condition.


6. On the customer's vehicle, remove the USB adapter unit. USB Adapter Unit Replacement

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

8. Check for continuity between the terminals of USB adapter unit connector B (5P) and 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 is still present, go to step 9.

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

- Audio: replace the affected shielded harness.

- Navigation: replace the dashboard wire harness.







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

10. Remove the audio unit Audio Unit Removal/Installation (Without Navigation) or the audio-navigation unit. Audio-Navigation Unit Removal/Installation (With Navigation) Check that the audio unit or the audio-navigation unit connectors and the USB adapter unit connectors are properly connected.

Are the connectors properly connected?
YES - Go to step 11.

NO - Connect the connectors and recheck.


11. Disconnect USB adapter unit connector A (14P).

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

13. Measure the voltage between body ground and USB adapter unit connector A (14P) terminals No. 1 and No. 2 individually.

Is there battery voltage?
YES - There is an open or short in the wire(s) between the USB adapter unit and audio-navigation unit or audio unit.

- Audio: replace the affected shielded harness.

- Navigation: replace the dashboard wire harness.


NO - Go to step 14.






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

15. Disconnect audio unit or audio-navigation unit connector E (14P).

16. Check for continuity between audio unit or audio-navigation unit connector E (14P) terminal No. 11 and USB adapter unit connector A (14P) terminal No. 11.

Is there continuity?
YES - Go to step 17.

NO - There is an open in the wire between the USB adapter unit and the audio-navigation unit or audio unit.

- Audio: replace the affected shielded harness.

- Navigation: replace the dashboard wire harness.







17. Check for continuity between the terminals of audio unit or audio-navigation unit connector E (14P) according to the table.





Is there continuity between any of the terminals?
YES - There is a short in the wires between the USB adapter unit and the audio-navigation unit or audio unit.

- Audio: replace the affected shielded harness.

- Navigation: replace the dashboard wire harness.


NO - Go to step 18.






18. Check for continuity between the terminals of audio unit or audio-navigation 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, 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) or audio unit. Audio Unit Removal/Installation (Without Navigation)

NO - Open in the wire(s) between the USB adapter unit and the audio-navigation unit or audio unit.

- Audio: replace the affected shielded harness.

- Navigation: replace the dashboard wire harness.