Battery Load Management; Inadvertent Power Battery Saver - Cadillac 2002 DeVille Owner's Manual

Battery Load Management

The battery load management feature is designed to
monitor the vehicle's electrical load and determine when
the battery is in a heavy discharge condition. During
times of high electrical loading, the engine may idle
at a higher revolutions per minute (rpm) setting than
normal to make sure the battery charges. High electrical
loads may occur when several of the following are
on: headlamps, high beams, fog lamps, rear window
defogger, the climate control fan at high speeds,
heated seats and engine cooling fans.
If the battery continues to discharge, even with the
engine idling at a higher rpm setting, some electrical
loads will automatically be reduced. When this occurs,
the rear window defogger may take slightly longer to
clear the glass, the heated seats may not get as warm as
they usually do and the fan may cut back to a lower
speed. For more battery saving information, see "Battery
Saver Active Message" in the Index.
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Inadvertent Power Battery Saver

This feature is designed to protect your vehicle's
battery against drainage from the interior lamps, trunk
lamp, glove box lamp, cigarette lighters or the garage
door opener. When the ignition is turned off, the
power to these features will automatically turn off after
10 minutes (three minutes if a new car has 15 miles
(24 km) or less). Power will be restored for an additional
10 minutes if any door is opened, the trunk is opened or
the courtesy lamp switch is turned on.