Single-key security system

A system for restricting access to said components of a vehicle, the vehicle having a first mode wherein access to the said components of the vehicle is restricted and a second mode wherein the certain components are accessible, the vehicle having a processor programmed to place the vehicle in the first mode upon receipt of a first signal and to place the vehicle in the second mode upon receipt of a second signal, the first signal being sent to the processor when the connector is withdrawn from the vehicle's remote control and the second signal being sent to the processor from the motor vehicle's radio, the radio being modified to include mode controls to put the vehicle in the second mode by the entering of a secret number including means to automatically change the radio from a normal power consumption mode to a lower power consumption mode upon failure of the normal power source thereby enabling a switch over to a lower capacity, secondary power source.

A system comprising a vehicle and an in-vehicle processor capable of operating in several modes, and means for switching operation of said processor from one mode to another, said means including signals received from a remote control incorporating a receptor and a control device removably held by said receptor, and means whereby removal of said device from said receptor causes transmission of a signal to the in-vehicle processor to switch from one mode to another.