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Home >> Buick >> 2015 >> Regal GS, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 7 (Hybrid/EV Energy Storage System) >> Diagnostic Information and Procedures >> DTC P1E3D: Control Module Calculated Hybrid/EV Battery Performance >> Circuit/System Description

Circuit/System Description

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As a means of checking microprocessor integrity, the Starter/Generator Control Module calculates and compares voltage at various locations within itself. The Starter/Generator Control Module calculates three separate voltage values, representing voltage measured at different locations within the Hybrid/EV Battery Pack. The Starter/Generator Control Module preforms these calculations at different locations within the microprocessor. As an indicator of microprocessor integrity, the voltage calculations should all be the same.