Through FMEA, the potential quality problems of products can be found and solutions are proposed to the greatest extent before production, so as to complete the quality improvement before mass production of products. Products at this stage are usually defined as C prototypes, which are product prototypes used for final design validation. Commonly used tools at this stage include dSPACE’s EIM software, DCIGSIs hardware, ETAS’ INCA software, ETK hardware, and bus communication tools that meet the ASAMMCD standard, such as Vector’s CANoe software and CANcase hardware.