salamalas

So how to I check if it's th ECM, and do I have to replace the entire ECM or can I just replace the fan circuit?

So here's what I know, I did a coolant drain and refill, radiator only, not the block and noticed my fans weren't on when the car was idling fully warmed up, a buddy of mine suggested jumping the relay to the fans to test if it was the relay, i tried with a paper clip, nothing happened, shut the car off, put the relay back in, started the car and now I have a P0480 code. I have cleared the code but it comes back, I have swapped out the relay, still have the code, I drained the coolant and replaced the ECT, but I still get the code. The Main fan runs non-stop as long as the key is in the on Position or the car is running. Both fans run when the a/c is on. I have no idea what else to check, any and all advice is greatly appreciated. thanks 2001 outback wagon limited Manual, 2.5 liter, a/c ABS