Lexus GS450h Owner's Manual page 223

Switching to EV drive mode when the gasoline engine is cold
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If the hybrid system is started while the gasoline engine is cold, the gasoline engine will
start automatically in order to warm up. In this case, you will become unable to switch to
EV drive mode.
To prevent gasoline engine warm up in order to
reduce noises, start the hybrid system without
starting the gasoline engine, pressing the power
switch with fully depressing the brake pedal and
pressing the EV drive mode switch.
Automatic cancelation of EV drive mode
■
When driving in EV drive mode, the gasoline engine may automatically restart in the fol-
lowing situations. When EV drive mode is canceled, a buzzer will sound and the EV drive
mode indicator will flash and go off.
The hybrid battery (traction battery) becomes low.
●
The remaining battery level indicated in the "Energy monitor" display is low. (P. 126)
Vehicle speed is high.
●
The accelerator pedal is depressed firmly or the vehicle is on a hill etc.
●
When it is possible to inform the driver of automatic cancelation in advance, a prior
notice screen will appear on the multi-information display.
Possible driving distance when driving in EV drive mode
■
EV drive mode's possible driving distance ranges from a few hundred meters to approxi-
mately 1 km (0.6 mile). However, depending on vehicle conditions, there are situations
when EV drive mode cannot be used.
(The distance that is possible depends on the hybrid battery [traction battery] level and
driving conditions.)
Fuel economy
■
The hybrid system is designed to achieve the best possible fuel economy during normal
driving (using the gasoline engine and electric motor [traction motor]). Driving in EV
drive mode more than necessary may lower fuel economy.
WARNING
Caution while driving
■
When driving in EV drive mode, pay special attention to the area around the vehicle.
Because there is no engine noise, pedestrians, people riding bicycles or other people
and vehicles in the area may not be aware of the vehicle starting off or approaching
them, so take extra care while driving.
GS450h_300h_OM_OM30F92E_(EE)
4-2. Driving procedures
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