Method of resetting a central lock system of a motor vehicle having a remote operator

摘要

A method of resetting a central lock system of a motor vehicle automobile connects a diagnostic device to a fixed part of the system. When the central unit is switched to the "SETUP" mode, the key of a new portable unit is inserted into a key-operated switch to interrogate a transponder of the portable unit, a transponder querying transceiver of the fixed unit to derive a key-identification code word which is stored in the transponder and in a memory of the transceiver. The transmitter is then operated to send a remote-control changing code word which progressively changes in the transmitter, to the receiver. The latter picks up the then-effective remote-control changing code word and stores it in the transceiver and transponder code word storage memories as a new transponder changing code word. The fixed unit is then switched back to its "NORMAL" mode.