Circuit/System Description
WARNING: This page is about a different car, the 2008 GMC Yukon and 2008 Chevrolet Tahoe. 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 located within the transmission is utilized to crank the engine. The 300V drive motor generator can rotate the engine to operating speed (800 RPM) within just a few hundred milliseconds. The HPCM can detect a condition where the engine is cranking but does not start or has stalled.