(T) amplifier connection to fiat

Hi i am new at this forum
(HOW I BOUGHT FIAT STILO)
I bought stilo 3 month ago 1.6 ( not many horse powers ) and i happy to drive this car it is my 3 italian car but first fiat (others was alfa romeo 155 V6 -sold it to take alfa romeo 155Q4 but with time car was modified for drag racing and i call it "adrenaline maker" believe me when car have 600 Hp+NOS it is something, but it is became too expensive and hard to drive this car (22l/100)and when engine broked up i decided to buy fiat and here some photos (wheels taked off from AR but next summer i think i will get 19"- dont fit on my ar 155
So thats the happy story how i get my stilo
Now to the main problem
I have some problems with connecting amplifier to head unit
when i connet RCA wires display says TCM and nothing happens and when i disconect them its playing like used to be i use "mini iso 5 rca" to connect it to the amplifier what do i wrong
Please explain some one this to me ThhkX!!!

i also had tmc display when i connected my amp, i couldn't get around the tmc message so used the speaker outputs

Doesnt matter now, i v done that by taking + from speakers output and - fro m line out