Diagnostic Network is an online community for technicians and professionals working in automotive, collision, and heavy-duty service markets. It helps members strengthen their diagnostic skills, use scan tools, scopes, and other diagnostic instruments effectively, and keep pace with industry trends and technology. Through peer and industry-partner engagement, the community supports ongoing learning, improved diagnostic proficiency, and career development.

Members can explore discussions, questions, case studies, demonstrations, technical tips, resources, events, surveys, and other message types. Topics span areas such as driveability, electrical systems, collision, heavy duty, electrification, programming, tooling, safety, and vehicle technology. Diagnostic Network also offers user groups, including a Chicago group and board-level technician group, alongside partner user groups. The site provides sign-up and account access, as well as information about membership pricing, privacy, and community participation.

The network is supported by partners including AESwave, ASE, ATMC, ATS, Autel, NASTF, Opus IVS, Pico Technology, TOPDON, and TST. It also highlights Technician Service Training, which provides training seminars and educational materials for the service industry.