Patent ID: 6211776
Filing Date: 2001-04-03
Classification: B60R,G07C

Abstract:
A method for initializing an anti-theft system, which comprises:a) setting an initial transmit condition;b) emitting an interrogation signal via a transceiver unit disposed in a motor vehicle and electrically connected to at least one antenna disposed on the motor vehicle;c) receiving the interrogation signal in a portable response transmitter located at a previously defined fixed position and emitting a response signal in response to the interrogation signal;d) receiving, evaluating, and comparing the response signal in a control unit of the transceiver unit with setpoint values;e) changing the initial transmit condition according to a predefined algorithm in dependence on the response signal received; andf) repeating steps b)-e) until the portable response transmitter just still receives the interrogation signal or just fails to receive the interrogation signal any more.