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HYBRID VEHICLE FREQUENTLY ASKED QUESTIONS - 3.3L,
HYBRID ELECTRIC VEHICLE (HEV)
AnswerQuestion
The high voltage battery is electrically isol-
ated from the rest of the vehicle when the
key is off. When you switch the key on, high
voltage contactors inside the battery are
closed to make the electricity available to
the motor and generator and enable the
vehicle to drive. The clicks are the sound of
these contactors as they close and open
during start up and shut down.
What are the series of clicks from the cargo
area when I first turn the key in the ignition?
The vehicle's computer will determine if an
engine start is required at key-on. Silent key
start will start the engine if it is necessary
for cabin heating, windshield defrost, or if
the outside temperature is low.
Why does the engine sometimes start at
key-on?
There are several reasons the engine stays
on for an extended amount of time when
you first start it. One common reason is to
make sure that the emissions components
are warm enough to minimize tailpipe
emissions. As the climate gets cooler, this
engine-on time is extended.
Why does it take a long time before the
engine shuts down?
In order to make sure that the climate
control system can begin heating the cabin
or defrosting the windshield as soon as a
driver requests it, the engine coolant
temperature has to be kept sufficiently hot.
Keeping the engine on is required to main-
tain the correct coolant temperature.
Why does my engine stay on when it is
extremely cold outside?
184
Explorer (CTW) Canada/United States of America, enUSA, Edition date: 201902, Third-Printing-
Unique Driving Characteristics
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