Nonstop Warning Sound Behind Dash ! Help !

January 9, 2016

I have -07 D4D Avensis, and it started to make beep sound, as a non stop and it has nothing to do with those alarm sounds for seatbelt/lights etc, and it's not even similar sound. This is a plain BEEEEEEEEE-nonstonp-EEEEEEEP, like qiant mosquito. Also i don't have any warning lights on, and i visited on workshop (official Toyota dealer in Finland) and they said is no need to read fault codes ???? Maybe they didn't have the interest or time to do that..

Everything works, except TRC-off button doesn't react or something doesn't react on TRC-off button. And i don't have PDC on my car.

Beeping starts when i turn key to ACC and stops when i turn the ACC off. And it also continues while driving, as nonstop.

Now i've located that the beep goes off as i take fuse "AM1" off, but it also turns down whole instrument. I can't find any diagram or else which could tell me what is behind AM1 for further investigations. Does anyone of you know anything about that fuse, or anyone of you ever heard similar problem ?

Please help, this is my wife's car and it's driving me mad everytime i have to drive with it :D