2013 Lexus RX 450h Owners Manual - Page 192

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2-1. Driving procedures

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Situations in which EV drive mode cannot be turned on

It may not be possible to turn EV drive mode on in the following situations. If it can-

not be turned on, a buzzer will sound and a message will be shown on the multi-

information display.

●

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.

●

The temperature of the hybrid system is low.

The vehicle has been left in extremely low temperatures for a long period of

time etc.

●

The gasoline engine is warming up.

●

The hybrid battery (traction battery) is low.

●

Vehicle speed is about 25 mph (40 km/h) or more.

●

The accelerator pedal is depressed firmly or the vehicle is on a hill etc.

●

The windshield defogger is in use.

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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.

●

The hybrid battery (traction battery) becomes low.

●

Vehicle speed becomes more than about 25 mph (40 km/h).

If engine coolant temperature is low, EV drive mode may be canceled when

vehicle speed is below 25 mph (40 km/h).

●

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.