SAE J2497™ MAR2026 Power Line Carrier Communication for Commercial Vehicles

SAE J2497™ MAR2026 defines bidirectional power line communication requirements for commercial vehicle tractor-trailer systems, including message formats, signaling, ABS indicator lamp control, and wireless attack mitigations.

SAE J2497™ MAR2026 is an SAE Recommended Practice for implementing bidirectional serial communications over the vehicle power supply line among microcomputer-equipped modules in commercial vehicle tractor-trailer systems. The document specifies hardware and software compatibility requirements, PLC network architecture, transceiver interfaces, message formats, modulation and encoding methods, timing, contention resolution, transmitter and receiver characteristics, ECU isolation, and network message definitions. It also defines control messages for trailer ABS indicator lamps, the Trailer ABS Active message, dynamic SAE J2497 message identifier assignment, and security recommendations addressing wireless reachability and remote RF-induced attacks. This revised edition supersedes SAE J2497 NOV2023 and includes updated discussion of attack vectors and actionable mitigations.

Application Scope: Applicable to engineers, vehicle manufacturers, trailer and tractor ECU developers, commercial vehicle communication system integrators, cybersecurity professionals, and test laboratories implementing or evaluating SAE J2497 power line communication networks.