Prius User-Guide (2010-2012)
When no other indicators lights are illuminated, this is the mode Prius is in.
Use this mode for the most average driving experience. All hybrid features will operate within the
regular tolerances, providing a nice balance of power & efficiency.
Eco-Meter
The “Hybrid System Indicator”, commonly referred to as the Eco-Meter, provides an assortment of information for the driver. This is
the source of detailed data not available from the classic “Energy Monitor”, making it the preferred choice after becoming accustomed
to how the hybrid system operates. The energy-bar displayed in the center points out the amount energy being consumed & captured in
addition to indicating the engine-on threshold.
The first zone is that green area illuminated in the photo of the energy-bar above. It identifies the
most efficient vehicle operation. Up to the center dividing line, the engine will remain off. For the
mode referred to as “Stealth”, driving up to 46 MPH using only electricity indicated by that green.
The second zone is the white area which follows the green. This indicates when additional power
is being consumed. When EV mode is active, this illustrates the amount electricity being drawn.
When beyond the EV mode (24 MPH) or “Stealth” mode (46 MPH) thresholds, this illustrates the
amount of thrust contributed by the gas engine.
The third zone is the red area. It indicates when high power demand is requested. This specific
zone should be used only briefly, to avoid inefficient driving. To make status easier to notice, like
during hard acceleration, the ECO symbol above the energy-bar disappears with red is active.