2007 Cadillac STS Owner's Manual - Page 266

BATTERY VOLTAGE HIGH This symbol appears with this message. BATTERY VOLTAGE LOW This symbol appears with this message. This message displays when the electrical charging system is overcharging the battery. When the system detects that the battery voltage is above an estimated 16 volts, this message displays. To reduce the charging overload, use the vehicle's accessories. Turn on the exterior lamps and radio, set the climate control on AUTO and the fan speed on the highest setting, and turn the rear window defogger on. The normal battery voltage range is 11.5 to 15.5 volts when the engine is running. You can monitor battery voltage on the DIC by pressing the information button until you find BATTERY VOLTS. This message displays when the electrical system is charging less than 10 volts or the battery has been drained. If this message appears immediately after starting the engine, it is possible that the generator can still recharge the battery. The battery should recharge while driving, but may take a few hours to do so. Consider using an auxiliary charger to boost the battery after returning home or to a final destination. Make sure you follow the manufacturer's instructions. If this message appears while driving or after starting your vehicle and stays on, have it checked immediately to determine the cause of this problem. 266