[jacques318]

I just bought E90 335 with cic, and two days ago ,I bought second hand logic 7 system:
11 speakers,
1 amplifier(produced model year 2007,used at E62/E90)

when i installed system and amp at my E90 335 and coded logic 7 program
but it does not work, no any sound
i thought the amp is broken,but
I tested the amp at E90 320 non cic, it did work very well
after that I changed to my friend AMP(model year 2009) it worked
can anyone help me?
why the amp model 2007 can not work at my 335 and the amp model 2009 can work at my 335?

how to resolve it(i ve heard i have to updates the program of amp itself)?

[ctuna]

I would say you need to go to the coding board to make
sure your recoding is correct .
You might check it against the other cars that the amp works in.
Do you need to reroute your fiberoptics on the most
bus loop?