Toussaint, a redshirt junior, ran for 1,041 yards and nine touchdowns on 187 carries as Michigan's starting running back in 2011. The total was second on the team behind quarterback Denard Robinson.
"Fitz made a poor decision and has been suspended indefinitely because of that action," coach Brady Hoke said in a statement Monday. "There are expectations that come with being a football student-athlete at the University of Michigan and those responsibilities were not met in this instance. We will use this as an opportunity to educate Fitz and make sure he understands the high standards that we have established within our program."
Saline (Mich.) Police Chief Larry Hrinik confirmed Toussaint's arrest. He said that at the time of the arrest, Toussaint's blood alcohol level was .12. Michigan's legal limit is .08.
Hrinik said Saline police officers were working a high-visibility enforcement area in Ann Arbor Saturday evening when they witnessed Toussaint go through a red light at the intersection of Forest and Washtenaw.
"The officers could smell intoxicants on his breath," Hrinik said. "They had him take a PBT (preliminary breath test) and ended up arresting him and brought him back here to process him."
Toussaint was released early Sunday morning on bond. His court date has yet to be determined and the police report didn't specify to whom Toussaint was released.
Toussaint was driving a white Ford 150. The police report didn't indicate whether anyone else was in the vehicle at the time of the arrest.
"It was a cut and dry report," Hrinik said. "The nice thing is that he was very cooperative."
Information from The Associated Press contributed to this report.