SAE J1699/2_201709旨在定义外部测试设备（如OBD-II故障诊断仪、， 检查/维护测试仪等），可用于验证是否符合适用标准，如 SAE J1978和SAE J1979，适用于乘用车、轻型卡车和中型车辆及发动机（OBD II）。

The purpose of SAE J1699/2_201709 is to define test cases for the OBD-II interface on external test equipment (such as an OBD-II Scan Tool, Inspection/Maintenance Tester, etc.) which can be used to verify compliance with the applicable standards such as SAE J1978 and SAE J1979 for Passenger Cars, Light-Duty Trucks, and Medium-Duty Vehicles and Engines (OBD II).