Audio System Symptom Troubleshooting - USB device does not function (with navigation)
  1. Check for continuity between terminals of USB adapter unit connector A (14P) according to the table.
    From terminal
    To terminals
    A3 (BRN)
    A9 (BLU), A10 (PNK)

Is there continuity?
YES -
Short in the wire(s) between the USB adapter unit and the audio unit. Replace the affected shielded harness.■
NO -
Go to Step 22 .
  1. Turn the ignition switch to LOCK (0).
  1. Disconnect USB adapter unit connector A (14P) and the navigation display 20P connector.