Fault simulation device for motorcycle on-board diagnostic system test

The utility model discloses a fault simulation device for testing a motorcycle on-board diagnostic system, which comprises a fault simulator, a cooler arranged in the fault simulator, and a support protection mechanism arranged on the fault simulator, the fault simulator comprises a shell, a plurality of simulation test modules and a simulation signal module; the supporting and protecting mechanism comprises a protecting box and an adjustable supporting frame, and the shell is located in the protecting box. The device is simple in structure and reasonable in design, simulates faults of a plurality of to-be-detected sensors through the fault simulator, can achieve the quick and safe simulation of grounding short circuit, power short circuit and open circuit faults of the to-be-detected sensors, prevents the detection personnel from repeatedly plugging and unplugging the sensors on a motorcycle to simulate different fault types of the sensors, and improves the detection efficiency. Therefore, damage to parts of