You may get the pdf after purchasing it.
You can download it from https://www.iso.org/standard/64253.html iso 142293 pdf
The International Organization for Standardization (ISO) has published a standard for the diagnostic communication over Controller Area Network (DoCAN) protocol, which is specified in the ISO 14229 series. This report focuses on the ISO 14229-3 standard, which deals with the data link layer and physical layer requirements for diagnostic communication. You may get the pdf after purchasing it