The SAE J1962 diagnostic connector consists of two mating connectors, the vehicle connector and the test equipment connector. This document: a.) defines the functional requirements for the vehicle connector. These functional requirements are separated into three principal areas: connector location/access, connector design, and connector terminal assignments; and b.) defines the functional requirements for the test equipment connector. These functional requirements are separated into two principal areas: connector design and connector terminal assignments. The scope of this document does not include the needs of long-term retention, such as in-flight recorder type applications. To ensure long-term retention, steps outside of the scope of this document must be taken.