Pioneer DEH-X3910BT/XNUC Update Instructions page 4

5. Turn M.C. dial to select the "S/W UPDATE ", then press to confirm.
6. Select the "SYSTEM UPDATE" for updating, then press to confirm.
7. After "UPDATE" appears, select "YES" to start updating process.
8. The "CHECK FILE" screen appears, after starting process.
-> If you receive one of the following messages: "FILE ERROR," "ERR->RETRY," proceed with the
following instructions.
"FILE ERROR" - Confirm the software is correct, then restart the update process or try a different USB
storage device.
"ERR->RETRY" - Do not turn off the power! Unit will retry automatically.
9. After starting, screen shows progress percent while updating.
10. Wait until updating is complete. (For about 3 minutes)