July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!
3-Digit Service Code-To-Test Menu (Codes 223-543)
WARNING: This page is about a different car, the 1993 Ford Mustang. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: 3-DIGIT SERVICE CODE-TO-TEST MENU TABLE (CODE 223-543)