Engine Off Load Shed

When the ignition is in ACC or ON mode and the BCM determines the battery voltage or the battery state of charge has dropped below set levels, a low battery warning message is displayed in the message center as described below. Should the battery voltage or the battery state of charge continue to drop, the audio system is powered down to save the remaining battery charge. This load shed state clears once the vehicle is started and battery state of charge is allowed to recover.

When the ignition is in the ON mode and if load shed occurs, the message center displays the corresponding message to notify the driver that battery protection actions are active. The audio system shuts down after the message center displays the warning.

If a fault occurs with the battery monitoring sensor or circuit(s), the only engine off load shed strategy that is active is a 45 minute timer. After 45 minutes have elapsed, the audio system turns off. To clear the load shed state, restart the engine.

If the vehicle battery is replaced,  perform the BMS reset using the diagnostic scan tool. If the BMS reset is not performed, measurement data collected for the old battery is not deleted and future state of charge measurements are inaccurate. For example, if an old battery has a state of charge of 60% and the new battery has a state of charge of 90%, the BCM recognizes the battery state of charge being 30% lower than it actually is. With the battery state of charge being perceived lower than it actually is causes shedding of loads earlier than is necessary. This also impacts the smart regenerative charge system by causing the battery to be maintained at a higher state of charge than perceived by the BCM, reducing fuel economy benefits. Refer to CHARGING SYSTEM  for more information on the Smart Regenerative charge system.

If the vehicle has been jump started,  test the battery condition. Refer to BATTERY .