Electronic injection signal test box

The utility model discloses an electronic injection signal test box. The device comprises a signal test box and a data line, one end of the signal test box is connected with the ECU control unit. The other end is connected with a sensor and an actuating mechanism through a wire harness; wherein the signal test box is internally provided with circuits with the same number as ECU output, input and power supply signals, each circuit is provided with a signal input jack, a signal control switch and a signal pickup jack, and the signal input jack and the signal pickup jack are connected with a test instrument or a signal generator through data lines. According to the utility model, the signal test box is connected in series between the ECU control unit and the wire harness; the signal test box is provided with input and output jacks of each path of signals and corresponding switches, and is connected with the jacks on the test box and a test instrument or a signal generator through a special data line to realize q