Jimenez has been out since November after clashing heads with David Luiz at Arsenal, but Nuno has previously said he expects the 29-year-old Mexican to be back before the end of the season.
And while stressing a specific return date remains too early to determine, the Wolves chief has now revealed: "He is doing good. He had a consultation and the results are amazing.
"So, gradually he will progress. It's too soon yet to predict an exact point.
"He's working by himself, but with a good intensity in his training sessions, so we're really positive and delighted with how he is doing."
Jimenez has been a regular presence at Wolves games as of late and been kept part of the first-team bubble at Compton since his injury.
Also on the injury front, Nuno has confirmed Rayan Ait-Nouri will be available for tomorrow night's FA Cup fifth-round tie against Southampton at Molineux.
Fernando Marcal, though, remains on the sidelines with along with Jimenez, Willy Boly and Daniel Podence.
"Rayan is available to join the squad tomorrow, but Marcal not yet," added Nuno.
"They (Boly and Podence) are improving, they are doing treatment, but they are not available for these two games against Southampton.
"They will get better and return gradually, but I cannot give you an exact time."