Audio System Symptom Troubleshooting - USB device does not function
  1. Check for continuity between USB adapter unit connector A (14P) and the audio unit connector D (14P) according to the table.
    USB adapter unit connector
    Audio unit connector
    Wire color
    GA-NET BUS+
    A9
    D9
    RED
    GA-NET BUS−
    A10
    D10
    GRN
    SYS ON
    A2
    D2
    LT BLU

Is there continuity?
YES -
Go to Step 21 .
NO -
Open or short in the wire(s) between the USB adapter unit and the audio unit; replace the affected shielded harness.■