Fault simulation and test system

The invention relates to a fault simulation and test system and belongs to the automobile electronic exploitation and test technology field. Automatic simulation and automatic diagnosis on multiple types of faults of each signal path can be realized through setting a host computer and the corresponding fault simulation and diagnosis equipment and further through utilizing preset fault simulation and diagnosis data, an external communication request can be further realized through utilizing a CAN communication box to carry out fault simulation and diagnosis on a detected ECU, so automatic fault simulation and automatic fault diagnosis can be realized, integration with a third-party test system can be conveniently realized, artificial test workload and professional level requirements for testers can be reduced, and thereby fault simulation and diagnosis cost is greatly reduced, and a tool utilization rate and test accuracy can be effectively improved.