This wireless communication runs on Radio frequency. The antenna coil is mounted on the top of ignition lock for RF transmission and receiving. The RF signal from the transponder received by the antenna coil is converted into messages for serial communication by the Immobilizer unit. And the received messages from the ECM are converted into an RF signal, which is transmitted, to the transponder by the antenna. Coil antenna provides energy to the transponder key and retrieves signal from the transponder and send it to Immobilizer unit.