This document specifies the vehicle communication interface and test equipment requirements regarding the physical and data link layer based on IEEE 802.3 100BaseTx. This interface serves as the physical basis for Internet Protocol based communication between the vehicle and test equipment. Therefore the following aspects are specified in the clauses of this document: . signal and wiring schematics requirements to ensure physical layer compatibility of the vehicle interface and Ethernet networks and test equipment communication interfaces, . activation and deactivation of the diagnostic Ethernet interface and . mechanical and electrical diagnostic connector requirements.