I have here an audi a3 1.6 petrol from 2001 at times the temperature needle rises to maximum, the engine is at 80celcius the fan is running at maximum and I see temperature rise in the diagnostic machine,
I already changed temperature sensor for a new original vag
I already controlled the cabling
it's all OK
Now I'm having doubts on the ECU, how can I make the diagnosis of the ECU?
I think when I see the wiring diagram that is the ecu that powers the fan
there is another wave of temperature in the engine but it is only for the air conditioner. someone can help me?