2011 Lexus HS250h battery

10
Hybrid System
■Hybrid System Indicator
Eco area
Eco Driving Indicator Light turns on
Hybrid Eco area
Eco Driving Indicator Light turns on
Charge area
Eco Driving Indicator Light turns on
Pow e r a r e a
Eco Driving Indicator Light turns off
●By keeping the indicator needle within Eco area, Eco-friendly driving can be achieved.
Hybrid Eco area shows that gasoline engine power is not being used very often.*
1
●Charge area indicates regeneration*2 status. Regenerated energy will be used to charge
the hybrid battery.
*
1: The gasoline engine will automatically stop and restart under various conditions.
*
2: When used in this manual, “regeneration” refers to the conversion of energy created by
the movement of the vehicle into electrical energy.
■Charging the battery
When shift position N is selected, the hybrid battery (traction battery) will not be charged.
Thus, select P when the vehicle is stopped.
In addition, when driving in heavy traffic, use D or B.
■Regenerative braking
The motor generator converts kinetic energy to electric energy when:
●The accelerator pedal is released while driving with shift position D or B selected.
●The brake pedal is depressed while driving with shift position D or B selected.
Your vehicle is a hybrid vehicle. It has characteristics different from conventional vehicles.
Be sure you are closely familiar with the characteristics of your vehicle, and operate with
care.
The hybrid system combines the use of a gasoline engine and an electric motor (traction
motor) according to driving conditions, improving fuel efficiency and reducing exhaust
emissions.
For details, refer to the “Owner's Manual”.

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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.)

12
Energy Monitor / Consumption Screen
■Energy monitor
The energy monitor can be displayed on both the navigation system screen and the multi-
information display.
●How to display on the navigation system screen (P. 4 1 ) :
Press the “MENU” button on the Remote Touch and select “Info. Phone” after that select
“Fuel consumption”.
If the “Consumption” or “Past Record” screen is displayed, select the “Energy” and press
the “ENTER” button on the Remote Touch.
●How to display on the multi-information display:
Toggle the “ENTER” switch on the steering wheel upward or downward through several
times to select the energy monitor display.
●The flow of energy is displayed on the
navigation system screen.
Amber: gasoline energy
Yellow: electrical energy
Green: energy recovery
A green arrow appears when regen-
erative braking occurs.
●The flow of energy is indicated by the
movement of the arrows on the multi-
information display.
You can view the status of your hybrid system on the multi-information display and the
navigation system screen.
The displayed energy flow, battery level, etc. will change in response to the current driving
conditions.

14
Keys
■Electronic key
Smart access system with push-button start
(P.1 5 , 1 7 )
*: If equipped
■Mechanical key.Carry the mechanical key together with the
electronic key. If the electronic key battery
is depleted or the entry function does not
operate properly, you will need the
mechanical key.
To take out the mechanical key:
Electronic keys: Slide the release lever
and take the key out.
Card key: Press the lock release button
and take the key out.
■Wireless remote control
Locks all the doors
Unlocks all the doors
Pressing the button unlocks the driver’s
door. Pressing the button again within 3
seconds unlocks the other doors.
Opens the windows and moon roof
(press and hold)*
Unlocks the trunk (press and hold)
Sounds the alarm
(press and hold)
*: This setting must be customized at
your Lexus dealer.
Card key*

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■EV drive mode
In EV drive mode, the electric motor (traction motor), powered by the hybrid battery (trac-
tion battery), is used to drive the vehicle.
This mode allows you to drive in residential areas late at night, or in indoor parking lots etc.
without concern for noises and exhaust gas emissions.
Turns EV drive mode on/off
When EV drive mode is turned on, the
EV drive mode indicator will come on.
Pressing the switch when in EV drive
mode will return the vehicle to normal
driving (using the gasoline engine and
electric motor [traction motor]).
■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 cannot be
turned on, a buzzer will sound and a message will be shown on the multi-information dis-
play.
• Vehicle speed is about 19mph (30km/h) or more.
• The hybrid battery (traction battery) is low.
In general, the remaining battery level indicated in the “Energy Monitor” display is level 3
or lower.
• 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 temperatures lower than about 32°F (0°C) for a long
period of time etc.
• The gasoline engine is warming up.
• The accelerator pedal is depressed firmly or the vehicle is on a hill etc.
• The windshield defogger is in use.

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What to do if...
■Starting the hybrid system
Depress the brake pedal.
Touch the Lexus emblem side of the
electronic key to the “POWER” switch.
If any of the doors is opened or
closed while the key is being touched
to the switch, an alarm will sound to
indicate that the start function cannot
detect the electronic key.
To change “POWER” switch modes:
Within 10 seconds of the buzzer sound-
ing, release the brake pedal and press
the “POWER” switch. Modes can be
changed each time the switch is pressed.
To start the hybrid system: Press the
“POWER” switch within 10 seconds
of the buzzer sounding, keeping the
brake pedal depressed.
In the event that the hybrid system still cannot be operated, contact your Lexus dealer.
If the electronic key battery becomes depleted, replace it with a new battery. For instruc-
tions on replacing the battery, refer to the Owner's Manual. If you need further assistance,
contact your Lexus dealer.