a3 .6 petrol fan problems

[TOINO]

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?

[nil]

Hi.
2-pin temperature sensor.
Remove the connector from the temperature sensor and check the multimeter pin on which is 5V. For a pin on which 5V is not connected, connect the cable and connect it to the ground. Install the plug and check if the temperature is correct on the ECU. If the temperature will be OK. this is caused by a weak mass or damaged ECU.
Temperature sensor 4 pin.
Do the same as for the 2-pin sensor, only at the beginning you need to determine which pins correspond to the ECU and which for the temperature indicator.

[TOINO]

i try and report mate

[TOINO]

solved the i have try a other ecu motor but is same, probleme is in de dash blue conector . soldering on pcb and now is ok