I have not been to CS, but the map shows a laundry facility as does the information at Disney's website:
Coronado Springs Resort The facility is near a pool.
If its like the other resorts we have stayed at, make sure you have plenty of quarters with you. There will likely be a change machine at the laundry room, but it may be out-of-order. I can't remember the price we paid at WL for the washer and dryer.
I think it was either $1 or $2 for each; maybe someone else can help out with that. The change machine was not working the time we were there.
My wife thinks we shouldn't do laundry on vacation, but I always plan on it:
-Reduces the number of clothes to pack
-Some clothes end up getting really dirty
-Reduces the number of clothes needing washed when getting back home
-Time during rest periods to handle this without taking away from the vacation