Car Diagnosis Systems

Car diagnosis systems have until now been manufacturer-specific and generally designed so that only authorised garage personnel can gain access to the data. This is now changing with the introduction of the standardised OBD-2 system, which has become an EU standard (EOBD) for all newly-developed cars. In this article we describe the interface in detail, and in a future article we will present a do-it-yourself EOBD diagnostic adapter.Factors such as improved safety and greater comfort, not to mention environmental friendliness, have made modern vehicles more and more complex. As manufacturers update their ranges ever more frequently, pressures on servicing costs grow, and too little time is available for training of garage personnel, car diagnosis systems are becoming essential in order to guarantee rapid, safe and economical testing, servicing and repairs.