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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 365 (Engine Controls And Fuel - Hybrid (LZ1) - DTC P0351 Through DTC P3449 And Troubleshooting) >> Diagnostic Information and Procedures >> DTC P0506 or P0507 >> Circuit/System Description

Circuit/System Description

WARNING: This page is about a different car, the 2011 GMC Yukon, 2011 Chevrolet Tahoe, and 2011 Cadillac Escalade. 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.

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