Patent ID: 6701233
Filing Date: 2004-03-02
Classification: G07C

Abstract:
A method of operating an off-board device to communicate with a diagnostic system of a vehicle, the diagnostic system having one or more modules, comprising the steps of:(a) requesting data from one or more of the diagnostic system modules using a first communications protocol; (b) determining a number of pieces of information received from the one or more modules using the first communications protocol; (c) requesting data from one or more of the diagnostic system modules using a second communications protocol; (d) determining a number of pieces of information received from the one or more modules using the second communications protocol; (e) selecting from the plurality of communications protocols a communications protocol to use for subsequent communications between the off-board device and the diagnostic system using at least the number of pieces of information received from the one or more modules using the first communications protocol and the number of pieces of information received from the one or more modules using the second communications protocol; and (f) communicating between the off-board device and the diagnostic system using the selected communications protocol.