I think you can disable the ABS by pulling a fuse, that way you can determine if the noise is still present or not. If the noise goes away when disabling the ABS then you probably have the same problem as me. But when I was inquiring about this problem no one knew what to check and I was to lazy to take it to the repair shop and have the diagnose it. The noise was present when running and wouldn't stop till about 2-3 seconds after I shut the car off. I never got any warning lights when this was happening either and then one day it stopped makingthe noise. As of today I don't really know if my ABS is functioning properly, but it's not making any noises anymore and there are no warning lights coming up. Sorry I couldn't help more.