TOYOTA 2011 Prius - Manual (Page 197)

171
2-1. Driving procedures
2
When
d
riving
PRIUS_U (OM47685U) DVD
n Situations in which EV-Drive Mode cannot be turned on
The followings are examples of situations under which the EV-Drive Mode
may not be turned on. If it cannot be turned on, a buzzer will sound and a
message will be shown on the multi-information display.
l The temperature of the hybrid system is high.
The vehicle has been left in the sun, driven on a hill, driven at high
speeds, etc.
l The temperature of the hybrid system is low.
The vehicle has been left in temperatures lower than about 32
°F (0 °C)
for a long period of time etc.
l The gasoline engine is warming up.
l The hybrid battery (traction battery) is low.
The remaining battery level indicated in the “Energy Monitor” display is
low. (
→P. 191)
l Vehicle speed is high.
l The accelerator pedal is depressed firmly or the vehicle is on a hill etc.
l The windshield defogger is in use.
n Automatic cancelation of EV-Drive Mode
When driving in EV-Drive Mode, the gasoline engine may automatically
restart in the following situations. When EV-Drive Mode is canceled, a
buzzer will sound and the EV-Drive Mode indicator will flash and go off.
l The hybrid battery (traction battery) becomes low.
The remaining battery level indicated in the “Energy Monitor” display is
low. (
→P. 191)
l Vehicle speed becomes high.
l The accelerator pedal is depressed firmly or the vehicle is on a hill etc.