Audio System Symptom Troubleshooting - USB device does not function (with navigation)
  1. Check for continuity between audio unit connector C (14P) and the navigation display 20P connector according to the table.
    Audio unit connector
    Navigation display connector
    Wire color
    GA-NET BUS+
    C9
    No. 3
    BLU
    GA-NET BUS−
    C10
    No. 13
    PNK

Is there continuity?
YES -
Go to Step 25 .
NO -
There is an open or short in the wire(s) between the audio unit and the navigation display. Replace the affected shielded harness.■