The agency took aim at the Davis Scale, a metric tracking socioeconomic advantage that has helped the institution maintain diversity in its student body.
The probe is one of dozens of civil rights investigations the federal agency has publicized over the last week.
The House Appropriations Committee advanced a bill that would enable students in those programs to access higher federal borrowing limits.
Despite budget pressures, officials framed the moves as an effort to eliminate silos and improve the student experience.