I finally managed to escape yellow warning problem and was able to code fog lights as DRL. To do this I disabled all cold/warm checks and now it works as expected (I double checked all light bulbs - everything is ok).
But overall I didn't get what I wanted - I thought fully automatic fog lights will work with LH_UND_NSW_NICHT_GLEICHZ option (front fog lights not simultaneously with flash-to-pass), but it won't
