Dear,
Did you know if that update gone work with all line:
United States, Canada : AVH-P8400BH
Europe : AVH-8400BT
Russia : AVH-P8400BT
Latin America, Asia, Middle East, Africa, Oceania : AVH-P8450BT
Brazil : AVH-P8480BT
India : AVH-P8490BT.
Look this,
http://www.pioneer.eu/uk/support/software/AVH-8400BT/page.html#download_310
Regards,
Felipe