The Ford Rotunda VCM Lite (vehicle communications module lite) is a diagnostic tool that allows vehicle diagnosis with the Ford DiagNow mobile app, available on Apple and Android devices. The small tool allows technicians to read and clear diagnostic trouble codes, view the vehicle network monitor, visualize vehicle parameters with Datalogger, and more on 2010 and newer Ford, Lincoln, and Mercury vehicles. As VCM Lite evolves, updates will be available through the Ford DiagNow app.