Audio System Symptom Troubleshooting - USB device does not function (with navigation)
  1. Measure the voltage between USB adapter unit connector A (14P) terminals No. 1 and No. 2 and body ground individually.
Is there battery voltage?
YES -
Go to Step 34 .
NO -
There is an open in the wire(s) between the USB adapter unit and the audio unit.■
  1. Turn the ignition switch to LOCK (0).
  1. Reconnect USB adapter unit connector A (14P).
  1. Turn the ignition switch to ON (II).