Circuit/System Description
WARNING: This page is about a different car, the 2009 GMC Sierra and 2009 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
This vehicle does not use a 12V starter motor to crank the internal combustion engine. A much more powerful 300V drive motor generator can rotate the engine to operating speed, 800 RPM, within just a few hundred milliseconds. During an engine cranking event, the HPCM can detect a condition where the engine is cranking but does not start.