In this paper, a different approach for software test automation of automotive Electronic Controller Unit is proposed where automation tool is based on the LabVIEW and TestStand platform. Canoe is used for simulation of environment. Parameters of ECU is accessed using XCP protocol. Communication between LabVIEW and Canoe is established using FDX i.e., Fast Data Exchange. FDX works on UDP protocol. CAN signals cannot be directly accessed by LabVIEW with use of FDX only hence CAPL node is used for accessing CAN signals in case of Unified Diagnostics Service related testcases. Hardware is integrated using VT system.