This MINI Cooper Diagnosis Without Guesswork handbook is a diagnostic manual written for the professional technician and the MINI enthusiast. Not intended to be a repair manual, this handbook is your comprehensive source for engine management and on-board system diagnosis. For the MINI technician with advanced automotive test equipment, the circuit descriptions, pinout charts, wiring schematics, scope traces, and real-world nominal values will prove essential in diagnosing problem cars. Even if you own only a generic OBD-II scan tool, a DVOM and a set of jumper wires, this book will help provide fast answers and guidance as it steps you through the diagnostic process. As a result of publishing our MINI repair manuals, we have been asked for DTC-based diagnostic information. This handbook is a response to that feedback.