ISO 11992
Encyclopedia
ISO 11992 is a CAN
Controller Area Network
Controller–area network is a vehicle bus standard designed to allow microcontrollers and devices to communicate with each other within a vehicle without a host computer....

 based vehicle bus
Vehicle bus
A vehicle bus is a specialized internal communications network that interconnects components inside a vehicle...

 standard by the heavy duty truck industry. It is used for communication between the tractor and one or more trailers.

The protocol structure is similar to SAE
SAE International
SAE International is an organization for engineering professionals in the aerospace, automotive, and commercial vehicle industries. The Society is a standards development organization for the engineering of powered vehicles of all kinds, including cars, trucks, boats, aircraft, and others.SAE...

 J1939
J1939
Society of Automotive Engineers SAE J1939 is the vehicle bus standard used for communication and diagnostics among vehicle components, originally by the car and heavy duty truck industry in the United States....

. The main differences are timing, bus voltage level and the structure of the message's 29-bit identifier.
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