Honda Civic Owner's Manual page 85

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i-VTEC and Rev Indicators
i-VTEC Indicator
Rev Indicators
* Not available on all models
*
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i-VTEC indicator
Comes on when the i-VTEC system switches
the low RPM cams to the high RPM cams.
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Rev indicators
Come on when the tachometer reading
approaches the red zone on a scale of one to
six.
uuGauges and DisplaysuGauges
1Rev indicators
When the fifth indicator (red) comes on, the engine
has reached its maximum output.
When all the indicators are on, the tachometer
reading is on the verge of entering into the red zone.
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