There are two primary ISO documents that describe how to perform OBD communications on K- line between a “tester” and a “vehicle”. There are actually several ISO and SAE documents, but these two are the main ones that describe all aspects of the items to be discussed in this white paper. These two documents also reference the other applicable documents. They are: ISO 9141 part 2 and, ISO 14230 in four parts, aptly labeled -1 through -4. Parts 2 and 4 are the ones that are pertinent here

K-line communication description_V3 0(1).pdf

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