SAE J1939-1 specifies the minimum set of SAE J1939 documents that define the Truck and bus control and communications vehicle network as it applies to on-highway equipment. Vehicles covered include all on-highway straight trucks and combination vehicles. A combination vehicle consists of one towing vehicle (tractor) and one or more towed vehicles (trailers and dollies). Dolly axles within the road train are considered to be towed vehicles.
SAE J1939/1-2021 history
2021SAE J1939/1-2021 On-Highway Equipment Control and Communication Network
2018SAE J1939/1-2018 On-Highway Equipment Control and Communication Network
2012SAE J1939/1-2012 On-Highway Equipment Control and Communication Network
2011SAE J1939/1-2011 On-Highway Equipment Control and Communication Network
2000SAE J1939/1-2000 Recommended Practice for Control and Communications Network for On-Highway Equipment