This document does not limit the hardware possibilities for the connection between the PC and the interface (e.g., RS-232, RS-485, USB, ethernet, etc.). Tool suppliers are free to choose the connection that is most appropriate for their needs. Tools that are required to be SAE J2534-1 compliant must strictly adhere to the requirements defined in this document. Applications that are required to be SAE J2534-1 compliant must strictly adhere to the requirements defined in this document. Applications that use features defined in the SAE J2534/2-xxxx document set are not considered to be SAE J2534-1 compliant.