PurposeThis SAE Recommended Practice recommends test methods@ test procedures@ and specific test parameters to help verify that vehicles and test tools can communicate using the SAE J1850. This document only verifies the portion of SAE J1850 that is used for OBD-II communications. The term ??test tool?? is synonymous with OBD-II Scan tool.ApplicationThe procedures@ methods@ and parameters contained in this document apply to vehicles and test tools which support OBD-II messages@ as outlined in SAE J1979. SAE J1699 is intended primarily for use as a design verification aid.RationaleThis document has been reaffirmed to comply with the SAE 5-Year Review policy.