engine Lexus HS250h 2011 Hybrid system /

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”.

11
■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.)

17
Power (Ignition) Switch
■Starting the hybrid system
Check that the parking brake is set.
Firmly depress the brake pedal.
The “POWER” switch indicator will
turn green. If the indicator does not
turn green, the hybrid system cannot
be started.
When shift position N is selected, the
hybrid system cannot start. Select the
P position when starting the hybrid
system.
Press the “POWER” switch.
After a while, the “READY” indictor
comes on with a beep sound.
The vehicle can move when the
“READY” indicator is on even if the
engine is stopped.
Continue depressing the brake pedal
until the hybrid system is completely
started.
The hybrid system can be started
from any mode.
■Stopping the hybrid system
Stop the vehicle by depressing the brake pedal.
Set the parking brake.
Press the P position switch to shift into P.
Check that the shift position indicator on the instrument cluster shows P.
Press the “POWER” switch.
Slowly release the brake pedal and check that the indicator on the “POWER” switch is
off.
Performing the following operations when carrying the electronic key on your person
starts the hybrid system or changes “POWER” switch modes.

19
Hybrid transmission
■Shifting the shift lever
Shift lever
Operate the shift lever gently and
ensure correct shifting operation.
When shifting to the D or R
positions, move the shift lever
along the shift gate.
To shift to the N position, slide
the shift lever to the left and hold
it. The shift position will change
to N.
Shifting to B is only possible
when shift position D is selected.
The shift lever will always return
to this position after a shifting
operation.
When shifting from P to D or R, from D
to R, or from R to D, ensure that the
brake pedal is being depressed and the
vehicle is stationary.
Shift position indicator
When selecting the shift position, make
sure that the shift position has been
changed to the desired position by
checking the shift position indicator pro-
vided on the instrument panel.
When any shift position other than D or
B is selected, the arrow toward B disap-
pears from the shift position indicator.
■Shift position purpose
*: For good fuel economy and noise reduction, the D position should usually be used.
Shift positionFunction
PParking the vehicle/starting the hybrid system
RReversing
NNeutral
DNormal driving*
BApplying moderate engine braking when driving down hills or on
steep slopes

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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.

What to do if...
89
List of Warning/Indicator Lights
Stop the vehicle immediately. Continuing to drive the vehicle may be dangerous.
(U.S.A.)
Brake system warning light
(Canada)
Stop the vehicle immediately.
Charging system warning light
High engine coolant temperature warning light (flashes or comes on)
Have the vehicle inspected immediately.
Brake system warning light
(Flashes)
“AFS OFF” indicator light
(if equipped)
(U.S.A.)
Malfunction
indicator lamp(comes on)
Slip indicator light
(Canada)
(Flashes)
“LKA” indicator light
(if equipped)
SRS warning light
(Flashes)
Cruise control indicator light
(U.S.A.)
“ABS” warning light(Flashes)
Radar cruise control indica-
tor light (if equipped)
(Canada)
(Flashes)
Automatic High Beam indica-
tor light (if equipped)
Electric power steering
system warning light
(Flashes and
then continu-
ously on)Tire pressure warning light
(Flashes)
“PCS” warning light
(if equipped)
For further information, refer to the Owner’s Manual.