In vehicles such as the 2012 MINI Cooper, it has been observed that access to diagnostics is not enabled directly through UDS; instead, there is a prior mechanism at the CAN network level where the vehicle periodically transmits a frame with ID 0x130 (e.g., 45 FF FC FF FF 00 00 00) that acts as a tester detection signal. By responding only once with a frame such as 0x7FF FF 00 00 00 00 00 00 00, the system recognizes the presence of a diagnostic tool and enables access to UDS services such as session control or data reading. This behavior suggests the involvement of a gateway implementing proprietary access control before the ISO 14229 standard, without requiring continuous communication maintenance or an explicit termination message, since the session ends through a timeout or when tester activity stops, thereby demonstrating an additional layer of security within the vehicle’s electronic architecture
