Problem with my Infiniti G-35 "slip" traction

On my 2007 Infiniti G-35, the “slip” light comes on and the traction over-reacts at random times. When this occurs, the wheels lock up with out me doing anything-including touching the brakes. Any ideas?

Pull all the wheels and carefully inspect the wheel-speed sensors and sensor rings. Check the wiring connectors to the sensors…If that checks out, get ready for a four-figure repair…To stop the wheels from locking up, pull the ABS fuse until you can get this repaired…

Do you still have good tread on your tires?