cooling Lexus HS250h 2011 Hybrid system /

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■Sounds and vibrations specific to a hybrid vehicle
There may be no engine sounds or vibration even though the vehicle is able to move. Always
change the shift position to P, and apply the parking brake when parked.
The following sounds or vibrations may occur when the hybrid system is operating and are
not a malfunction:
●Motor sounds may be heard from the engine compartment.
●Sounds may be heard from the hybrid battery (traction battery) behind the rear seats
when the hybrid system starts or stops.
●Sounds from the hybrid system may be heard when the trunk lid is open.
●Sounds may be heard from the transaxle when the engine is started or stopped, or while
the engine is idling.
●Engine sounds may be heard when accelerating sharply.
●Sounds may be heard due to regenerative braking when the brake pedal is depressed
and accelerator is loosened.
●Other sounds, such as motors and mechanical noises, may be heard from the brake sys-
tem when the brake pedal is depressed.
●Vibration may be felt when the gasoline engine starts or stops.
●Cooling fan sounds may be heard from the air intake vent on the side of rear left seat-
back.
When driving in Eco drive mode, the fan noise may be louder than when driving nor-
mally.
■Running out of fuel
When the vehicle has run out of fuel and the hybrid system cannot be started, refuel the
vehicle with at least enough gasoline to make the low fuel level warning light go off. If there is
only a small amount of fuel, the hybrid system may not be able to start.
(The minimum amount of fuel to add to make the low fuel level warning light go out is about
2.6 gal. [10 L, 2.1 Imp.gal.], when the vehicle is on a level surface. This value may vary when
the vehicle is on a slope.)

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■Selecting a driving mode
The following modes can be selected to suit driving conditions:
Eco drive mode
Suitable for improving the fuel economy,
because the torque corresponding to
the accelerator pedal depression
amount can be generated more
smoothly than it is in normal conditions
and the operation of the air conditioning
system (heating/cooling) will be mini-
mized.
When the “ECO MODE” switch is
pressed, the “ECO MODE” indicator
comes on in the meter.
Po w e r m o d e
Suitable when the vehicle needs to drive
powerfully or travels in mountainous
areas.
When the power mode switch is
pressed, the “PWR MODE” indicator
comes on in the meter.
■Using air conditioning in Eco drive mode
The Eco drive mode controls heating/cooling and fan speed operation to improve fuel
consumption. When you want to improve the effectiveness of the air conditioning sys-
tem, adjust the fan speed or cancel the Eco drive mode.
For more information, refer to the “Navigation System Owner’s Manual”.

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Air Conditioning System
(with navigation system)
■Using the automatic mode
Press to turn on the airflow and to adjust the temperature.
■Adjusting the temperature
■To simultaneously adjust the driver’s side and passenger’s side temperature settings
Select to turn the “DUAL” indicator off and then press .
■To individually adjust the driver’s side and passenger’s side temperature settings
Select or press to turn the “DUAL” indicator on and then press or .
Dual mode button
Passenger side temperature display
Fan speed display
Passenger side temperature control
Windshield defogger
Outside air/recirculated air mode
button
Air outlet selector button
Fan speed control button“OFF” button
Automatic mode button
Driver side temperature control
Cooling and dehumidification function
on/off button
Driver side temperature display
Air outlet display
Micro dust pollen filter button
Plasmacluster™ button
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Air Conditioning System
(without navigation system)
■Using the automatic mode
Press to turn on the airflow and to adjust the temperature.
■Adjusting the temperature
■To simultaneously adjust the driver’s side and passenger’s side temperature settings
Press to turn the “DUAL” indicator off and then press .
■To individually adjust the driver’s side and passenger’s side temperature settings
Press or to turn the “DUAL” indicator on and then press or .Passenger side temperature display
Dual mode button
Passenger side temperature control
Windshield defogger
Outside air/recirculated air mode
button
Air outlet selector buttonFan speed control button
“OFF” button
Automatic mode button
Driver side temperature control
Cooling and dehumidification function
on/off button
Driver side temperature display
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