Modding HU-611 for MP3 input
 

this thread talks about doing this free mod on older units on the s70 cars and such
http://www.matthewsvolvosite.com/for...147&hilit=ipod

i want to take out my unit and do the same but want to avoid the check engine light since its part of the network system in the car

is this doable on this head unit ????? any thoughts >?