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

US5712512A · kind A · utility

Assignee

• Kiekert AG · DE

Inventors

• Wilfried Ostermann · Essen, DE
• Fred Welskopf · Herne, DE

Key dates

• Filing date: Aug 1, 1996
• Grant date: Jan 27, 1998
• Expiry date: Aug 1, 2016

Classification

• Technology area (CPC G): Physics
• CPC primary: G07C2009/00873
• WIPO field: Control
• WIPO sector: Instruments

Abstract

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.