The 31-year-old Argentina international rocked the Magpies earlier this month by informing them that he wanted to return home because of personal problems.
However, the club held firm, scuppering his hopes of winning a move to San Lorenzo before persuading the central defender to stay until the end of the current season at least.
Pardew insisted the sentiment of an open letter from the player to the South American club, which was made public over the weekend, had been lost in translation and he is confident that Coloccini will once again give his all for Newcastle, starting in tonight's key clash with fellow strugglers Aston Villa.
He said: "Sometimes you draw a line in the sand and I think we have done that.
"He has had to do that, we have had to do that and say 'Now come on, let's focus on what's important here and that's Newcastle', and as a professional, I think he will do that.
"Really it's his performances that will reflect that and he is conscious of that. He wants to show how committed he is, not by words because there have been a lot of words said. Sometimes, it's about performance."
- Sports & Recreation