A method and system for conducting a vehicle service comprises the steps of receiving signals representative of vehicle parameters, accessing data and/or software necessary for performing the vehicle service from at least one remote computer over a data transmission network, and performing signal processing related to the vehicle service based on the signals representative of the vehicle parameters and the accessed data and/or software. Since the data and/or software necessary for conducting the vehicle diagnostic analysis is distributed in different systems that are connected via a data communication network, an automotive service system can minimize the size of software stored locally and can access most of the information and/or algorithm required for conducting the vehicle diagnostic analysis from a remote system.