General Motors Local Area Network

General Motors Local Area Network (GMLAN) is an application- and transport-layer protocol using controller area network for lower layer services.^[1] It was standardized as SAE J2411 for use in OBD-II vehicle networks.^[2]

Transport-layer services

Transport-layer services include the transmission of multi-CAN-frame messages based on the ISO 15765-2 multi-frame messaging scheme. It was developed and is used primarily by General Motors for in-vehicle communication and diagnostics.^[3] GM's Tech2 uses the CANdi (Controller Area Network diagnostic interface) adapter to communicate over GMLAN.

Applications

Some software applications that allow interfacing to GMLAN are Intrepid Control Systems, Inc.'s Vehicle Spy 3; Vector's CANoe; Dearborn Group's Hercules, ETAS' ES-1222, ES590, ES715, and ES580; ScanTool.net's OBDLink MX; EControls by Enovation Controls' CANCapture; and GMLAN vehicle universal remote control GMRC for Android devices

Tesla uses J2411 (single-wire CAN over the Control Pilot) for their DC Supercharger (newer units are also capable of PLC over the control pilot) and AC Destination Charging.^[4]

References

^ "GMW3089". Retrieved 2018-08-08. General Motors Local Area Network (GMLAN) Single Wire Controller Area Network (SWCAN) Physical and Data Link Layers Specification
^ "Controller Area Network (CAN BUS) Protocol | Free Course". Kvaser. Retrieved 2020-09-27.
^ Jeff Hartman (2004-02-13). How to Tune and Modify Engine Management Systems. Motorbooks. pp. 252–. ISBN 978-0-7603-1582-8. GMW3110
^ Johnson, Jay; Berg, Timothy; Anderson, Benjamin; Wright, Brian (2022-05-26). Review of Electric Vehicle Charger Cybersecurity Vulnerabilities, Potential Impacts, and Defenses (Technical report). US: Sandia National Laboratories. doi:10.3390/en15113931.

[1] "GMW3089". Retrieved 2018-08-08. General Motors Local Area Network (GMLAN) Single Wire Controller Area Network (SWCAN) Physical and Data Link Layers Specification

[2] "Controller Area Network (CAN BUS) Protocol | Free Course". Kvaser. Retrieved 2020-09-27.

[Hartman2004-3] Jeff Hartman (2004-02-13). How to Tune and Modify Engine Management Systems. Motorbooks. pp. 252–. ISBN 978-0-7603-1582-8. GMW3110

[4] Johnson, Jay; Berg, Timothy; Anderson, Benjamin; Wright, Brian (2022-05-26). Review of Electric Vehicle Charger Cybersecurity Vulnerabilities, Potential Impacts, and Defenses (Technical report). US: Sandia National Laboratories. doi:10.3390/en15113931.

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