Audio System Symptom Troubleshooting - USB device does not function (With Navigation) (2016 2017 2018)

NOTE: 

• Check the vehicle 12 volt battery condition first .
• Check the USB's specifications:
• • -

    Mass-storage class ready digital audio player with USB 2.0 port

  • -

    More than 256 MB storage space

  • -

    Supports MP3, WMA, and AAC (encoded with the iTunes) 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 that USB devices may work in newer vehicles, but not in older vehicles of the same model.
• Before doing this troubleshooting, check the USB Error Cords .
• Check the connectors for poor connections or loose terminals.

1. Determine possible failure area (USB device, others)

   -1. Connect the customer's USB device to a known-good vehicle (same year/trim) that is equipped with a USB port, and check the USB device operation.

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

   YES 

   Go to step 2.

   NO 

   See the Owner's Manual for details about the USB device requirements and approved file types.

2. Problem verification

   -1. On the customer's vehicle, connect the customer's USB device to the USB port.

   -2. Turn the vehicle to the ON mode.

   -3. Check the USB device operation in the customer's vehicle.

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

   YES 

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

   NO: USB port A and B do not work

   The failure is duplicated in USB port A and B, replace the audio-navigation unit .

   NO: USB port A does not work

   The failure is duplicated in USB port A, go to step 3.

   NO: USB port B does not work

   The failure is duplicated in USB port B, go to step 4.

3. Open wire check (USB A lines)

   -1. Turn the vehicle to the OFF (LOCK) mode.

   -2. Disconnect the following connectors.

   Audio-navigation unit connector F (5P)

   USB adapter A 5P connector

   -3. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	Audio-navigation unit connector F (5P): disconnected
   	USB adapter A 5P connector: disconnected

   Test point 1:  Audio-navigation unit connector F (5P)	Test point 2:  USB adapter A 5P connector
   No. 1	No. 4
   No. 2	No. 1
   No. 3	No. 3
   No. 4	No. 2

   Is there continuity?

   YES 

   The USB harness is OK. Go to step 5.

   NO 

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

4. Open wire check (USB B lines)

   -1. Turn the vehicle to the OFF (LOCK) mode.

   -2. Disconnect the following connectors.

   Audio-navigation unit connector G (5P)

   USB adapter B 5P connector

   -3. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	Audio-navigation unit connector G (5P): disconnected
   	USB adapter B 5P connector: disconnected

   Test point 1:  Audio-navigation unit connector G (5P)	Test point 2:  USB adapter B 5P connector
   No. 1	No. 4
   No. 2	No. 1
   No. 3	No. 3
   No. 4	No. 2

   Is there continuity?

   YES 

   The USB harness is OK. Go to step 5.

   NO 

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

5. Audio-navigation unit check (substitution)

   -1. Substitute a known-good audio-navigation unit .

   -2. Reconnect all the connectors, and recheck.

   Does the symptom go away?

   YES 

   Replace the original audio-navigation unit.

   NO 

   Replace the USB adapter A or USB adapter B .