The thesis was focused on a wide project that promote the use of the IoT technologies on the Automotive system, committed by a world leader in logistic services to the company Reply. This software product is mainly used by the fleet manager that has to control a lot of vehicles and so needs an easy and efficient way to program customized charging and preconditioning schedules for each vehicle. The Client has committed to the Company Reply the programmable part of the Telematic Control Unit of the vehicles. After the introduction about the testing process and the vehicle system structure, highlighting the communication protocol used by the component to exchange data and commands, the elaborate draws the attention on the validation of the software application deployed in the Telematic Control Unit carried out at Reply Company.