This course focuses on the practical operation cases of comprehensive automotive troubleshooting, including the troubleshooting of poor engine idling, the troubleshooting of electronic power steering system, the troubleshooting of the fuel supply system, the troubleshooting of the starting system does not run, the troubleshooting of the lighting system, the troubleshooting of the CAN bus, and through the cases, it demonstrates the practical operation process of the comprehensive troubleshooting of the automotive fault diagnosis, including the observation of the fault phenomenon, the preliminary inspection, In-depth analysis, fault location and troubleshooting. Through the course, we have a deeper understanding of the methods and processes of fault diagnosis.