iii Modern Automotive Technology is an easy-to-understand, up-to-date textbook detailing the operation, diagnosis, service, and repair of automobiles and light trucks. It has been designed to help prepare aspiring technicians for exciting and productive careers in the automotive industry. It also provides the information needed to prepare for the ASE Automobile and Light Truck Certification Tests. No longer can the untrained person effectively diagnose and repair modern vehicles. As technology has evolved, even the most basic automotive systems have become dauntingly complex. Multiple onboard computers are now used to moni- tor and control the engine, transmission, suspension, brakes, emission controls, and other vital vehicle systems. As the demand has grown for technicians who can diagnose and repair these increasingly sophisticated automotive systems, so has the need for a learning solution that prepares students for entry-level employment in this exciting field. Modern Automotive Technology will give you the tools you need to succeed in the challenging and ever-changing world of automotive technology. The 2022 edition of Modern Automotive Technology is organized around the ASE Automobile and Light Truck test areas and correlated to the ASE Education Foundation Task List. It has been thoroughly revised by the author and carefully vetted by a panel of experts in the field of automotive education, as well as a team of technical editors, to make sure the material is technically accurate, up-to-date, and presented in the most logical and effective manner. Modern Automotive Technology has been painstakingly designed to provide a student-focused approach to learning. Short sentences, concise definitions, and thousands of color illustrations will help you learn quickly and easily. Information is presented using a building-block approach that starts with simple principles and general rules, and progresses gradually to more complex subjects. Each major automotive system is covered in two or more chapters. The first chap- ter explains the construction and operation of a specific system. The next chapter expands on this knowledge by discussing diagnosis, service, and repair of the same system. As society transitions from printed textbooks to digital learning tools, we know it is important to provide the content you need in the format you need it in. The Modern Automotive Technology textbook and the accompanying workbook and shop manual are available in both print and digital formats, and are supported with professionally developed, user-friendly online resources. These resources include electronic study tools, videos, animations, simulations, and interactive activities designed to prepare you for success in your studies and career. We congratulate you on your study of automotive technology and encourage you to take advantage of all the resources available as part of the Modern Automotive Technology learning solution. Preface