SPRINGFIELD — A divided Illinois Supreme Court on Thursday ruled a state impaired driving law allowing warrantless testing is constitutional on its face, reversing an appellate court ruling from 2017.A 5-1 majority of the high court revived the section of the state’s Vehicle Code statute that allows police to test for drugs or alcohol without a warrant if they suspect an impaired driver may have caused a death or injury.Relying on U.S. Supreme Court precedent, the majority found the section was unconstitutional as it …