Audio System Symptom Troubleshooting - USB device does not function (with navigation)
  1. Check for continuity between terminals of audio unit connector C (14P) according to the table.
    From terminal
    To terminals
    C3 (BRN)
    C9 (BLU), C10 (PNK)

Is there continuity?
YES -
Short in the wire(s) between the audio unit and navigation display. Replace the affected shielded harness.■
NO -
Go to Step 27 .
  1. Turn on the audio unit, and check for sound in each mode (AM, FM, and CD).
Is the sound normal?
YES -
Replace the USB adapter unit. ■
NO -
Replace the audio unit. ■
  1. Turn the ignition switch to LOCK (0).
  1. Disconnect USB adapter unit connector A (14P) and the audio unit connector C (14P).