Revis, a four-time Pro Bowl selection, suffered a concussion in a 48-28 season-opening victory over the Buffalo Bills last weekend. Though he has since been cleared to run and lift weights, he is still barred from contact.
"If he's not 100 per cent, then Darrelle won't play," coach Rex Ryan said. "It's as simple as that.
"If a guy had a concussion, I don't think you would put him on a plane to make a game-time decision. I would think by Saturday we'll certainly have an answer."
Revis was injured in the fourth quarter of Sunday's game against Buffalo when he tackled tailback C.J. Spiller and was accidentally kicked in the head by team mate Bart Scott.
The 27-year-old, who has been an All-Pro for the past three seasons, would have to be cleared by a team physician and also an independent neurological consultant to play against the Steelers on Sunday.
"It's not my call," Revis said. "Whatever they say goes. I would try to be out there with a broken leg. They know that. It's a competitive spirit in me that just wants to go out there and play."