Toussaint, who has been suspended by Michigan coach Brady Hoke following his arrest, was charged with operating while intoxicated after running a red light in Ann Arbor on July 21. The junior registered a 0.12 blood-alcohol content.
Hoke said Tuesday he had not decided whether Toussaint, who rushed for 1,041 yards last season, will play against No. 2 Alabama on Saturday.
In his plea agreement, Toussaint's initial OWI charge was dropped. Toussaint will be sentenced at 8:30 a.m. on Oct. 23 in 14A-4 District Court. Judge Kirk W. Tabbey instructed him to stay away from alcohol and illegal drugs.
"People at U-M will keep a close eye on that, I'd imagine," Tabbey said during the proceedings.
Toussaint can be punished by up to 93 days in jail, a $300 fine plus court costs, 360 hours of community service and vehicle immobilization when he is sentenced.
During the proceeding, Toussaint admitted to drinking VSOP, a brandy, at his home before driving on July 21. He was "not sure" how much he had to drink.
Toussaint did not comment after the proceedings and his attorney, Douglas Lewis, told reporters to "just take a hike."