Automotive ECU Functional Test System Based on PXI

The traditional functional test system has such defects as high deviation and poor stability in the automotive ECU (Electronic Control Unit) test, so an automotive ECU functional test system based on PXI was proposed in the paper, wherein the system is composed of PXI bus, electronic monitoring test module, universal meter and computer. Specifically, the PXI bus is used for the data collection and the initialization test of the automotive ECU and for transmitting the data to the electronic monitoring test module; the electronic monitoring test module is composed of controller, power supply module, detection module, signal transceiver and on-off controller; the power module is used as the power supply of the electronic monitoring module; the detection module is used for transmitting the fault data detected thereby to the signal transceiver for signal transformation; the on-off controller is used for switching or cutting off the circuit through the fault signal analysis, and the controller is used for controlling the operation procedure of the whole electronic monitoring test module and for transmitting the screened data to the universal meter; the universal meter is used for amplifying the received data signals and transmitting the amplified data to the computer. The software design aimed to provide the test procedure and the troubleshooting algorithm of the automotive ECU functional test system based on PXI. The experiment result shows that the system designed thereby has high accuracy and high stability.