Didier Deschamps' men have fired in eight goals in two wins to send them top of Group E, with Ecuador second on three points - level with Switzerland, but ahead on goal difference.
Given the Swiss have the much easier task of tackling Honduras in their group finale, the Ecuadorians know they must beat France to hold their own destiny in their hands.
"The reading that I give is that we will have a lot of work defensively," Erazo said.
"It is time that Ecuador started raising our performance level up.
"(We) know that France is a tough opponent, which is playing great games.
"Ecuador now have a thirst (to succeed)."
Midfielder Christian Noboa said the French's quality up front was a concern for his side.
"Scoring a goal in a World Cup is difficult and scoring eight… it gives you a guideline of what is France," Noboa said.
"France is a dynamic team, we know the goals they have scored. It's a winning team that knows the spaces well, but hopefully we can reverse that," Ayovi said.
