Ford Fusion Hybrid 2010 Owner's Manual page 9

NOTE: Having your engine running is not always an indication of
inefficiency – in some cases it is actually more efficient than driving in
electric mode.
Additional Tips:
• Do not carry extra loads
• Be mindful of adding external accessories that may increase
aerodynamic drag
• Observe posted speed limits
• Perform all scheduled maintenance
• There is no need to wait for your engine to "warm up". The vehicle is
ready to drive immediately after starting
Refer to Essentials of good fuel economy in Maintenance and
Specifications chapter for more fuel saving tips.
Frequently asked questions
Question
What are the series of clicks from
the cargo area when I first turn
the key in the ignition?
Why does the engine sometimes
start at key-on?
2010 Fusion Hybrid (hfv)
Owners Guide, 3rd Printing
USA (fus)
Introduction
Answer
The high voltage battery is
electrically isolated from the rest
of the vehicle when the key is off.
When the key is turned to on, high
voltage contactors inside the
battery are closed to make the
electricity available to the
motor/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.
The vehicle's computer will
determine if an engine start is
required at key-on. Silent Key
Start (SKS) will start the engine if
it is necessary for cabin heating,
windshield defrost, or if the
outside temperature is low.
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