Use this link to learn a bit about can bus protocol - don’t over-think it.. While it is good to know the concept it will not be a critical diagnostic tool for you in the future.
https://youtu.be/FqLDpHsxvf8
Good luck!
RepairPal Certified shops can diagnose and repair your 2004 Hyundai Tiburon. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.