SAE J1939 Protocol in Hindi || J1939 Protocol Working and DTC Explained

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#Hardwaresociety #J1939 #J1939Protocol #CAN #CANFD #Automotive #j1939inhindi #j1939protocolinhindi #SAEJ1939 #shorts #DTC
The J1939 protocol specifies how to deconstruct, transfer and reassemble packets across multiple frames - a process referred to as the J1939 Transport Protocol (see J1939-21). Two types of the J1939 Transport Protocol exist: The Connection Mode (intended for a specific device).
What is J1939?
In short, SAE J1939 is a set of standards that define how ECUs communicate via the CAN bus in heavy-duty vehicles.
As explained in our CAN bus intro, most vehicles today use the Controller Area Network (CAN) for ECU communication. However, CAN bus only provides a "basis" for communication (like a telephone) - not a "language" for conversation.
In most heavy-duty vehicles, this language is the SAE J1939 standard defined by the Society of Automotive Engineers (SAE).
In more technical terms, J1939 provides a higher layer protocol (HLP) based on CAN as the "physical layer".
J1939 history
1994: First docs were released (J1939-11, J1939-21, J1939-31)
2000: The initial top level document was published
2000: CAN formally included as part of J1939 standard
2001: J1939 starts replacing former standards SAE J1708/J1587
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