Tech Tip: Computer Protocols
December 23, 2014
A computer protocol is simply the way a series of computerized systems and components communicate with each other. In this Tech Tip, Jim Wilson uses the diagnostic protocol SAE J1587, which was developed by the Society of Automotive Engineers for heavy-duty and most medium-duty vehicles. This tip is good for anyone that wants some good basic information on automotive computer protocol standards and procedures.
• MID Message/Module Identification
• PID Parameter Identification
• SID Subsystem or Status Identification
• FMI Failure Mode Identifier
• Counter
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