The Automotive Diagnostics self-paced course offers a comprehensive introduction to the techniques, tools, and systems used to identify, analyze, and troubleshoot faults in modern vehicles. Designed for automotive technicians, engineering students, and vehicle enthusiasts, this course covers both fundamental and advanced diagnostic methods across mechanical, electrical, and electronic subsystems. Learners will explore topics such as onboard diagnostics (OBD and OBD-II), sensor and actuator testing, diagnostic trouble codes (DTCs), and the use of diagnostic tools like scan tools, multimeters, and oscilloscopes. The course also delves into electronic control units (ECUs), CAN bus communication, and common faults in engine, transmission, braking, and infotainment systems. With a strong focus on real-world applications and hands-on procedures, participants will develop the skills needed to perform accurate diagnostics, reduce downtime, and improve vehicle reliability. By the end of the course, learners will be equipped to effectively diagnose and address a wide range of automotive issues using industry-standard practices and tools.