The Sky Blues were close to clinching a deal with the 25-year-old around 10 days ago having agreed a fee with the Canaries, however, the switch was scuppered due to the high demands of the player's agent.
Resurrecting the deal was never ruled out and Coleman has revealed the initial stumbling block looks to have been overcome.
"It is still bubbling," he told the Coventry Telegraph. "I think one or two people have come to their senses, which I am glad about, but we have got other targets as well."
Meanwhile, trialist Jens Berthel Askou has been asked to continue training with the Canaries at Colney this week after making a positive impact on the club's tour of Scotland.
The 26-year-old Danish central defender, who was released by Turkish outfit Kasimpasa earlier this summer, headed the winning goal in the 3-2 victory over Airdrie at the weekend and could get the chance to impress once again against a Manchester United XI this Saturday.