Reprogrammable remote keyless entry system

摘要

A remote keyless entry system includes a remote key fob or transmitting unit which may be carried by the operator. This fob may transmit coded function signals directing the vehicle to perform requested functions, e.g. unlock the doors, and an on-board receiver that receives the request and performs the function. The receiver may be reprogrammed by the customer to accept signals from a different transmitter in the event that a key fob is either lost or stolen. To program the receiver, the system is put in a programming mode by using a transmitter whose security code is already stored within the receiver. This programming mode is entered by depressing specified buttons on the transmitting unit for a predetermined amount of time. Once in the programming mode, all previous security codes are erased, and a new transmitting unit code may be programmed into the receiver by depressing any button on that unit. The receiver will chime to acknowledge to the customer that the new security code has been accepted.