The reliable and high speed data communication between the sensing devices and actuating devices through a controller is the real time requirement in an automobile. The higher the speed lessens response time in critical situation. The parameter such as ABS, airbags, engine temperature need on time response. Otherwise the whole system may met with severe collapse or some time may threaten life also. To make all the factor be in a system that performs better, the communication between the controller with sensing and actuating devices should be with in a frame of high speed communication. The CAN bus is highly reliable and provides high speed communication between control input and resultant output. The earlier generation of CAN is a point to point communication that was using more number of wire. As a result, wired load lags the system speed. This is a major issue when threat is so critical. To overcome all these drawbacks CAN was introduced that reduces the load on system. CAN offers higher flexibility and expandability. The integration of CAN bus with automobile industry is new perception that created a proper link in controlling devices. The factors such as headlight, engine, wiper, door lock, car speed and location tracking are analyzed and taken a valid action against them. The director of the project is Advanced RISC Machine (ARM) 7 LPC2129 microprocessor. In CAN bus the communication arisen with the help of CAN Transceiver. The CAN transceiver is responsible for the CAN communication. The MASTER and SLAVE is controlled by CAN controller. The CAN communication enhances the flexibility, performance and security of the system.