Battery Saver Mode/Battery Saver On Message - If Equipped

The IBS communicates with the BCM over the LIN bus and provides the BCM with battery voltage, current temperature, and State Of Charge (SOC) information. The BCM uses SOC and voltage of the battery, directly measured by the IBS, to determine load shedding strategies.

When the load shed criteria are met, load shed level messages are broadcast by the BCM on the CAN bus. The BCM turns off loads under its control, and passes on the message to a secondary control device to turn off loads. All load shedding is conducted in an orderly and progressive manner to avoid electrical power system instability and to minimize customer anxiety and concerns.

To enter the load shed operation, three conditions must be met:

1. The engine must be running.
2. The battery SOC must be less than or equal to 70%.
3. The battery voltage measured by the IBS must be less than, or equal to 12.2 V.

When these three conditions are met, the load shed operation begins. The Battery Saver On message is displayed on the IPC to inform the driver that actions are being taken to save the battery. Below is a list of prioritized loads that are shed in sequence.

• Load Shed Level 1 - None.
• Load Shed Level 2 - When there is a net charge loss of 7.5 amp hours (Ah), the heated seats and heated steering wheel system take load reduction actions (when equipped).
• Load Shed Level 3 - When there is a net charge loss of 10 Ah, the heated cooled cupholders are turned off (if equipped).
• Load Shed Level 4 - When there is a net charge loss of 12.5 Ah, the rear defroster and heated mirrors are turned off.
• Load Shed Level 5 - When there is a net charge loss of 15 Ah, the Heating, Ventilation, and Air Conditioning (HVAC) system takes load reduction actions.
• Load Shed Level 6 - When there is a net charge loss of 17.5 Ah, the power inverter system is turned off (if equipped).
• Load Shed Level 7 - When there is a net charge loss of 20 Ah, the audio and telematics system takes load reduction actions.

Charging System:

• The charging system is independent from load reduction. The charging system performs a diagnostic on the charging system continuously.
• If the Charging System Light is on it may indicate a problem with the charging system.

Loss of the battery charge may indicate one or more of the following conditions:

• The charging system cannot deliver enough electrical power to the vehicle system because the electrical loads are larger than the capability of charging system. The charging system is still functioning properly.
• Turning on all possible vehicle electrical loads (HVAC to max settings, exterior and interior lights, overloaded power outlets +12V, 115V Alternating Current (AC), Universal Serial Bus (USB) ports) during certain driving conditions such as city driving, towing, and frequent stopping.
• Installing options like additional lights, up-fitters, audio systems, alarms and similar devices.
• Unusual driving cycles (short trips separated by long parking periods).
• The battery aging.
• The vehicle was parked for extended period of time (weeks, months).
• The battery was recently replaced and was not charged completely.
• The battery was discharged by an electrical load left on when the vehicle is parked.
• The battery was used during parking time to supply radio, lights, chargers, +12V portable appliances like vacuum cleaner's, game consoles and similar devices.