Honda 2017 Civic Owner's Manual page 438

Models with driver information interface
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Shift Up/Down Indicators
Come on while the vehicle is in the 7-speed
manual shift mode to indicate when a speed
position change is appropriate to maintain the
most fuel efficient driving style.
The shift up indicator: Comes on when
shifting up is recommended.
The shift down indicator: Comes on when
shifting down is recommended.
uuWhen DrivinguShifting
1Shift Up/Down Indicators
WARNING
3
The shift indicator is only a guide to help
you achieve better fuel economy.
Never refer to the Shift Indicators when
road and traffic conditions are unsuitable
or when it may distract you.
This indicator will not prompt you to downshift to
increase engine braking. It is up to you to downshift
to increase engine braking when driving downhill.
Always shift down at the appropriate vehicle speed.
When the ECON mode is on, ambient meter color
may change if you do not change gears when a shift
indicator illuminates. This can result in a change in
fuel economy.
Road and traffic conditions may require you to shift
at times other than those indicated.
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