Diagnostics: Test don't guess. Learn all the skills you need to pass Level 3 and 4 Vehicle Diagnostic courses from IMI, City and Guilds and BTEC, as well as ASE, AUR, and other higher-level qualifications. Along with twenty-five new real-life case studies, this fifth edition of Advanced Automotive Fault Diagnosis includes new content on diagnostic tools and equipment: VCDS, decade boxes, scanners, pass through, sensor simulators, break out boxes, multimeter updates for HV use, and more . It explains the fundamentals of vehicle systems and components, and it examines diagnostic principles and the latest techniques employed in effective vehicle maintenance and repair. Diagnostics, or fault finding, is an essential part of an automotive technician's work, and as automotive systems become increasingly complex there is a greater need for good diagnostic skills. Ideal for students, included throughout the text are useful definitions, key facts, and 'safety considerations'. It will also assist experienced technicians to further improve their performance and keep up with recent industry developments.