BMW 5 Series
Buick LaCrosse
Chrysler 200
Dodge Avenger
Ford Fusion
Honda Accord
Hyundai Sonata
Kia Optima
Mazda Mazda6
Mercedes-Benz E-Class
Nissan Maxima
Subaru Legacy
Toyota Camry
Volvo S60Buick LaCrosse: Lighting Features
Buick LaCrosse: Lighting Features
Entry Lighting
The headlamps, taillamps, license
plate lamps, back-up lamps, dome
lamps, and most of the interior lights
turn on briefly when the Remote
Keyless Entry (RKE) 
button is
pressed, or when the door handle is
pulled on a keyless access vehicle.
See Ignition Positions (Key Access) or Ignition Positions (Keyless Access).
After about 30 seconds the exterior
lamps turn off, then the dome lamps
and remaining interior lights dim to
off. Entry lighting can be disabled
manually by changing the ignition
out of the OFF position, or by
pressing the RKE 
button.
This feature can be changed. See Vehicle Personalization.
Exit Lighting
The headlamps, taillamps, parking lamps, back-up lamps, and license plate lamps come on at night, or in areas with limited lighting, when the key is removed from the ignition.
The dome lamps also come on when the key is removed from the ignition. The exterior lights and dome lamps remain on after the door is closed for a set amount of time, then automatically turn off.
For vehicles with keyless access, the exterior lights and dome lamps automatically turn on when a door is opened after the ignition is turned off. See Ignition Positions (Key Access) or Ignition Positions (Keyless Access).
The exterior lights turn off immediately by turning the exterior lamps control off.
This feature can be changed. See Vehicle Personalization.
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 of 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. If so, a DIC message might be displayed and it is recommended that the driver reduce the electrical loads as much as possible. See Battery Voltage and Charging Messages.
Battery Power Protection
The battery saver feature is designed to protect the vehicle's battery.
If the exterior lamps or any interior light is left on and the ignition is turned off, the battery rundown protection system automatically turns the lamp off after about 10 minutes.
