Method for initializing an anti-theft system for a motor vehicle

US6211776A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Thomas Röhrl · Barbing, DE
• Manfred Glehr · Eggenfelden, DE

Key dates

• Filing date: Mar 5, 1999
• Grant date: Apr 3, 2001
• Expiry date: Mar 5, 2019

Classification

• Technology area (CPC G): Physics
• CPC primary: G07C2209/63
• WIPO field: Control
• WIPO sector: Instruments

Abstract

An interrogation signal is emitted via one or more passenger compartment antennas of a motor vehicle. The transmit power of the emitted interrogation signal is changed until a portable transponder just still receives the interrogation signal if the transponder is located at a previously defined, fixed position. The transmit power which is set in this way is stored for the operation of the anti-theft system.