A method for selectively energizing at least one component of a receiver module in a vehicle with energy to determine the presence and the validity of a high-frequency signal transmitted, said high-frequency signal is a request signal for activating a vehicle accessory function, the method comprising the steps of: Supplying the power to a receiver for a first period of time; Operating the receiver to receive a high frequency signal from a remote transmitter; Determining a received signal strength indicator (RSSI) during operation of the receiver; Determining whether the RSSI is between a first predetermined threshold value and a lower for the first predetermined threshold the second predetermined threshold value, if true, then determining a noise identification parameter to determine on the basis of whether the period of time the power supply is to be extended; if the RSSI is greater than the first predetermined threshold value, automatically supplying the power to the receiver for a longer period of time than the first time period, and if the RSSI is less than ...