An advanced-level course in the application of diagnosing, locating, and correcting trouble encountered in automotive service, using various types of testing equipment. Engine diagnosis includes variable cam timing and variable displacement engine systems. Electrical diagnosis includes computer-controlled charging systems, battery, and starting systems, including one-touch and remote-start systems. Fuel system diagnosis includes pressure and injector tests using active commands and relative flow analysis. Coursework also explores various common problems that occur in the servicing of the modern automobile.