A vehicle tracking unit is provided for a vehicle of a type comprising a vehicle data bus extending throughout the vehicle and at least one operable vehicle device connected thereto. The at least one operable vehicle device may be responsive to at least one data bus code on the vehicle data bus. The...http://www.google.com.hk/patents/US20020163449?utm_source=gb-gplus-share專利 US20020163449 - Vehicle tracking unit for controling operable vehicle devices using a vehicle data bus and related methods
