Well, today I found a way around the annoing beeping when turning on the ignition or starting my 1.6L Stilo with the Abarth instrument cluster instead of the "low" version:
as i expected this to be a timing problem i built the delay circuit which is normally used for retrofitting a Connect Nav.
I changed the capacitor on pin 7+6 of the LM555 from 100uF to 47 uF to decrease the delay time.
I cut the dark blue wire of the cluster (switched 12v) and put the delay circuit in between these two wire ends.
I attached the earth of the delay circuit to the black wire of the cluster (earth)-
after some experiments i found that after 1-1,5 seconds delay the cluster doesn't beep anymore, the "checking" and "check o.k." are shown and the car runs fine.
As the body computer does 3 attempts within 4 seconds to check if all nodes are present this is not a problem.
Although the pointer of the temperature gauge still moves to "very hot" for a few seconds and the text "cruise control activated" is still shown at start-up i'm glad i can start the car without the 3 annoing beeps....
I realise this is not the final solution but it's not that urgent anymore to find out where this comes from....very rarely the car shows normal reading of the temperature but i can't find a relationship yet.
Of course i will continue to search for the cause of this annoing fault but if it can't be found this may be a solution for other Stilo owners with similar problems.
I will keep you informed about my progress...
yellowstilo
