Operating Functions
WARNING: This page is about a different car, the 2009 GMC Yukon, 2009 Chevrolet Tahoe, and 2009 Cadillac Escalade. However, it is still accessible from the selected car via links, so may be relevant.
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.