Operating Functions
WARNING: This page is about a different car, the 2009 GMC Sierra and 2009 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
The battery energy control module (BECM) is also referred to as the drive motor generator battery control module. In order to maintain proper state of charge levels and operate efficiently, the hybrid drive motor generator battery has several systems that need to be monitored and controlled. These systems include hybrid battery voltage measurement, hybrid battery current measurement, hybrid battery cooling and the high voltage interlock loop system. Additionally, the BECM operates the high voltage contactor relays at the request of the hybrid powertrain control module (HPCM). The BECM is located within the hybrid battery assembly.