alternator PONTIAC G5 2008 Owners Manual

Entry/Exit Lighting
The lamps inside the vehicle will go on when any door
is opened. These lamps fade out about 20 seconds
after all of the doors have been closed or when
the ignition is turned to ON/RUN. These lamps will also
go on when pressing the trunk release, unlock symbol,
or the horn symbol button on the Remote Keyless Entry
System (RKE) Transmitter.
After the key is removed from the ignition, the lamps
inside the vehicle stay on for about 20 seconds to
provide an illuminated exit.
Mirror Reading Lamps
Your vehicle may have reading lamps on the rearview
mirror. Push the button to turn the reading lamps on
and off.
Electric Power Management
This vehicle has Electric Power Management (EPM),
an advanced control system. It estimates the battery’s
temperature and state of charge and 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 put the charge back in. When
the state of charge is high, the voltage is lowered slightly
to prevent overcharging. If the vehicle has a voltmeter
gage or 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
that is needed for very high electrical loads.
A high electrical load occurs when several of the
following loads are on: 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.
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