Electric-controlled unit testing apparatus

The utility model discloses an ECU detecting device, comprising a power supply module, a display module, a control panel and a detecting mainboard, wherein, the power supply module and the display module as well as the control panel are respectively connected with the detecting mainboard; the detecting mainboard also comprises a master chip, a communication unit, an output unit and an input unit; the master chip is connected with the communication unit, the output unit and the input unit respectively. The ECU detecting device solves the problem that the ECU hardware circuit can not be detected in the round and improves the reliability of the ECU.