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Home >> Cadillac >> 2009 >> Escalade Base, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 3 (Hybrid Engine Controls - Introduction) >> Description and Operation >> Drive Motor Generator Control Module Description and Operation >> Hybrid Powertrain Control Module (HPCM) >> Operating Functions
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Operating Functions

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The HPCM is the main controller of hybrid operation. The HPCM determines when to perform hybrid operation modes such as engine Auto-stop and regenerative braking. The HPCM also operates in conjunction with the battery energy control module (BECM) to determine when to enable and disable the DC high voltage circuits. Each MCM operates the applicable electric motor generator based upon HPCM commands.