A method of diagnosing a status of a vehicle. The vehicle has an on-board computer for generating a diagnostic trouble code signal related to a passed or problem status of the vehicle. A portable code reader is connected to the on-board computer. Diagnostic trouble code signals are communicated from...http://www.google.de/patents/US6941203?utm_source=gb-gplus-sharePatent US6941203 - Method and system for computer network implemented vehicle diagnostics
