Hyundai's factory diagnostic systems include the Global Diagnostic System (GDS), tablet-based GDS Mobile and the later GDS Smart application. The software runs on a diagnostic terminal or tablet; a vehicle communication interface (VCI) connects it to the vehicle. Hyundai's 2014 service training publication introduces GDS Mobile; the manufacturer's 2024 service bulletin demonstrates GDS Smart fault-code searching with a VCI.
Software and interface
GDS Smart supports diagnostic tasks such as fault-code searching and data analysis, and provides an ECU upgrade function for applicable procedures. GIT's 2026 release guide describes GDS Smart and VCI II/VCI 3 connections. The interface and software are distinct items: using a particular VCI does not by itself establish that the correct Hyundai software or required functions are available.
Kia diagnostic systems use related GIT interfaces but their own KDS application. GIT lists Hyundai GDS Smart and Kia KDS 2.0 separately while discussing VCI 3 and VCI II in a shared support notice.
Coverage
Choose the application, region, vehicle model, year, engine and interface using the current Hyundai service procedure. GIT's vehicle selection guidance shows that market selection matters, including for reimported vehicles. Programming and security access can require subscriptions or authorisation.