Had this a couple days ago, on an Armada, My problem was actually the pin fit. Once I fixed that the problem never came back. Jiggle the connector and if everything starts working then, at least check all the pins before you replace the $1200 ABS unit.
Nissan Senior Tech, Mtn View Nissan Chattanooga, TN
*If I don't respond right away it's because the volume on this board has gone WAY down so I only check it once or twice a week*