This edition of Understanding Automotive Electronics covers the most recent technological advances in operation and troubleshooting of electronic systems and components. This is a practical text, suitable for the automotive technician, student or enthusiast. It includes low-emission standards, on-board diagnostics and communications, digital instrumentation, and digital engine control. In today's cars, the electronics systems are more complex than simple electrical wiring; they now affect almost every operating aspect of the automobile. The basis for understanding the functions of automotive electronics systems and subsystems is a good grasp of mechanical auto operation. Extensive revision of a popular text Covers ultra-low emission vehicle regulations Reviews basic automotive and electronic systems