Chevrolet Sonic Owner's Manual: Battery Load Management
The vehicle has Electric Power Management (EPM) that estimates the battery's temperature and state of charge. It then adjusts the voltage for best performance and extended life of the battery.
When the battery's state of charge is low, the voltage is raised slightly to quickly bring the charge back up. When the state of charge is high, the voltage is lowered slightly to prevent overcharging. If the vehicle has a voltmeter gauge or a voltage display on the Driver Information Center (DIC), you may see the voltage move up or down. This is normal. If there is a problem, an alert will be displayed.
The battery can be discharged at idle if the electrical loads are very high. This is true for all vehicles. This is because the generator (alternator) may not be spinning fast enough at idle to produce all the power needed for very high electrical loads.
A high electrical load occurs when several of the following are on, such as: headlamps, high beams, fog lamps, rear window defogger, climate control fan at high speed, heated seats, engine cooling fans, trailer loads, and loads plugged into accessory power outlets.
EPM works to prevent excessive discharge of the battery. It does this by balancing the generator's output and the vehicle's electrical needs. It can increase engine idle speed to generate more power, whenever needed. It can temporarily reduce the power demands of some accessories.
Normally, these actions occur in steps or levels, without being noticeable. In rare cases at the highest levels of corrective action, this action may be noticeable to the driver.
Battery Power Protection
The battery saver feature is designed to protect the vehicle's battery.
If some interior lamps are left on and the ignition is turned off, the battery
rundown protection system automatically tu ...
Other materials:
Front Side Door Window Weatherstrip Replacement
Front Side Door Window Weatherstrip Replacement
Callout
Component Name
Preliminary Procedures
Remove front side door trim panel. Refer to Front Side Door Trim
Replacement.
Remove the outside rearview mirror. Refer to Outs ...
Windshield Washer Solvent Container Filler Tube Replacement
Windshield Washer Solvent Container Filler Tube Replacement
Callout
Component Name
Preliminary Procedure
Open and support the hood assembly.
Grasp the top portion of the windshield washer container filler
tube and rotate t ...
Brake Drum Surface and Wear Inspection
Special Tools
CH-8001 Dial Indicator Set
For equivalent regional tools, refer to Special Tools.
Warning: Refer to Brake Dust Warning.
With the brake drum removed, clean the brake shoe lining contact surface
of the brake drum with denatured alcohol or an equivalent approved brak ...
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