Product Code:SAE J1939/71 Title:Vehicle Application Layer (Through May 2006) Issuing Committee:Truck Bus Control And Communications Network Committee Scope:This document has also changed to comply with the SAE Technical Standards Board format. Definitions have changed to Section 3 and Abbreviations to Section 4. All other section numbers have changed accordingly. This series of SAE Recommended Practices has been developed by the SAE Truck and Bus Control and Communications Network Subcommittee of the SAE Truck and Bus Electrical and Electronics Committee. The objectives of the subcommittee are to develop information reports, recommended practices, and standards concerned with the requirements design and usage of devices which transmit electronic signals and control information among vehicle components. The usage of these documents is not limited to truck and bus applications; other applications may be accommodated with immediate support being provided for construction and agricultural equipment, and stationary power systems. These documents are intended as a guide toward standard practice and are subject to change as to keep pace with experience and technical advances.New parameters and parameter groups are reviewed and discussed by the Subcommittee on a regular basis. This document reflects all changes and additions approved and balloted through December 2001.