ECM Malfunction

[Tunedperformance]

Is TunerPro showing commanded on ?
is the fan switch flag correct for a c4 ?

[nilak]

yes, when it’s cold they fans are commanded off then I can seen in TPro when the ecm commands them on but nothing happens. I’m currently using s-aujp xdf but it did the same thing with the normal xdf and stock settings except for VE tables, spark, injectors flow and a few other parameters.

[nilak]

I've recently replaced the ECM and the new one is able to start both fans. So clearly if the relays were good and wiring was fine the only thing left was the ECM. Fair enough, one of the integrated circuits that are connected to the Fan pins has a smell of burned electronics, I suppose it's a MOSFET. Should be replaceable. The other things are ok, like the MPG was actualy ok, and the Coolant temperature on HVAC display has the same behaviour with the new ECM, I belive it's has some special code to it and maybe a hysteresis.