Tech Tip: Computer Protocols

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

Related Course

Heavy Duty Scan Tool Diagnostics

View Course

On-board diagnostic standards, similar to passenger cars, are being added to class 7 and class 8 trucks to provide greater access to diagnostic information for diesel technicians. This LiveStream will cover the history of heavy-duty communication protocols and changes to diagnostics connections.

Read More