H
-12-
ybrid Synergy Drive Operation (2010 Model)
Once the READY indicator is illuminated in the instrument cluster, the
vehicle may be driven. However, the gasoline engine does not idle like a
typical automobile and will start and stop automatically. It is important
to recognize and understand the READY indicator provided in the
instrument cluster. When lit, it informs the driver that the vehicle is on
and operational even though the gasoline engine may be off and the
engine compartment is silent.
Vehicle Operation
• With the Prius Plug-in hybrid, the gasoline engine may stop and start at any
time while the READY indicator is on.
• Never assume that the vehicle is shut off just because the engine is off.
Always look for the READY indicator status. The vehicle is shut off when
the READY indicator and instrument cluster lights are off.
• The vehicle may be powered by:
1. The electric motor only.
2. A combination of both the electric motor and the gasoline engine.
• The vehicle computer determines the mode in which the vehicle operates in
order to improve fuel economy and reduce emissions. The Prius Plug-in
hybrid features plug-in EV (Electric Vehicle) mode, a mode that is
automatically selected when the HV battery is charged using an external
power source. Power and ECO (Economy) modes are driver selectable.
1. ECO Mode: When activated, this mode helps enhance fuel
economy on trips that involve frequent braking and acceleration.
2. Power Mode: Optimizes acceleration feel by increasing the power
output more quickly at the beginning of accelerator pedal
operation.
Instrument Cluster READY Indicator
Economy Drive Mode Switch/Power Mode Switch
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