ECU Tools are also known as Electronic Control Unit Tools. These tools are mostly used in automobile sector and these tools control many other electrical systems in motor vehicles. These tools are also known as Electronic Control Module Tools or Central Control Module Tools. Every car owner expects high performance from his car. This system mainly consist a microprocessor of 8-bit, read only memory (ROM), random access memory (RAM), and an interface for input and output. This input sensor provide information regarding fuel injection, temperature, coolant, air flow etc to this system and depending on all this data, ECU finally determine the output setting like speed, ignition time etc.