Vehicle machine testing device for diagnosing fault code aging mechanism

The utility model discloses a vehicle machine testing device for diagnosing a fault code aging mechanism. The vehicle machine testing device comprises a testing system logic module, a CAN testing module, a current checking module, a sampling resistor and a power supply, the output end of the test system logic module is connected with the input end of the CAN test module, and the input end of the test system logic module is connected with the output end of the current detection module. And the output end of the CAN test module is connected with the input end of the tested part. The input end of the current detection module is connected with the first output end of the sampling resistor. The second output end of the sampling resistor is connected with the cathode of the tested part, and the input end of the sampling resistor is connected with the cathode of the power supply. According to the utility model, the wake-up and sleep states of the CAN bus interface are automatically monitored through the single-chip