Diagnostic Overview
WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 2010 BMW M6, 2010 BMW M5, 2009 BMW M6, 2009 BMW M5, and 2008 BMW M6. However, it is still accessible from the selected car via links, so may be relevant.
The engine control units of M Automobiles consist of a three-processor system. One is a Digital-Signal-Processor (DSP) and has the main function of detection knocking Signals. The other two are RISC Processor from the Motorola Power PC family. The main functions of each are described below.
Power PCI(INJ): Injection timing, fuel-mixture generation, calculation of engine load, monitoring of PPC2
Power PC2(IGN): Ignition timing, controlling throttle, monitoring of PPC1