Society of Automotive Engineers standard SAE J1587 is an automotive diagnostic protocol standard developed by the Society of Automotive Engineers (SAE) for heavy-duty and most medium-duty vehicles built after 1985.
Beginning in 2001, most OEMs converted to the 9-pin Deutsch.
The pinout for the 9-pin connector is: The pinout for the 6-pin connector is: SAE J1708 makes up the physical and data link layers while SAE J1587 makes up the transport and application layers with respect to the OSI model.
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