Method for calibration of a keyless entry system for a motor vehicle
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United States of America Patent
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-
Jul 5, 2005
Grant Date -
Oct 31, 2002
app pub date -
Sep 13, 2001
filing date -
Sep 13, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Method for calibrating a motor vehicle hands-free access system comprising a control unit (UC) with an emitting antenna (AE) and an antenna controller (PA), consists in: 1. sending to the control unit (UC), from a measurement apparatus (AM) equipped with a receiving antenna (AR) connected to the control unit (UC) via a wire link (LF), a message to configure the control unit (UC) in calibration mode, 2. transmitting a signal via said emitting and receiving antennas (AE, AR) to said measurement apparatus (AM), 3. measuring characteristics of the received signal, comparing them with reference values and sending calibration data via the wire link (LF), 4. on receipt of the data, modifying the parameters of the antenna controller (PA). Using this method, it is possible to correct certain operating defects of the hands-free access systems through an operation at the end of the motor vehicle assembly line.
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