Electrical Load Management

The body control module (BCM) controls electric power management following an idle boost and a load shed algorithm. The load shed control algorithm will deactivate electrical loads if the idle boost algorithm is unable to maintain system voltage. If idle boost is active for a certain amount of time and the system voltage is still below a set value, then load shed will command the heated seats, HVAC blower, and rear defog to deactivate periodically. The deactivations will be cycled such that the customer may not observe limited operation. The duty cycle will be controlled independently by each of heated seats, HVAC blower, and rear defog. If idle boost continues to be active, the engine RPM low, and the system voltage remains low, then load shed will command the heated seats, HVAC blower, and rear defog to deactivate completely. When this occurs, the driver information center (DIC) will display "Battery Saver Active". Once the idle boost becomes unnecessary or the engine RPM is above a set value, and the system voltage is above a set value, the load shed algorithm will command the heated seats, HVAC blower, and rear defog to resume normal operation.