ECO mode Lexus HS250h 2010 User Guide

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1-7. Theft deterrent system
1
Before driving
HS250h_U_75033U(Canada)
■System maintenance
The vehicle has a maintenance-free type alarm system.
■Items to check before locking the vehicle
To prevent unexpected triggering of the alarm and vehicle theft, make sure of the
following:
●Nobody is in the vehicle.
●The windows and moon roof are closed before the alarm is set.
●No valuables or other personal items are left in the vehicle.
■Deactivating or stopping the alarm
Do one of the following to de activate or stop the alarms:
● Unlock the doors or trunk.
● Turn the “POWER” switch to ACCESSORY or ON mode, or
start the hybrid system. (The alarm will be deactivated or stopped
after a few seconds.)

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2-1. Driving procedures
HS250h_U_75033U(Canada)
■Operating your vehicle in a foreign country
Comply with the relevant vehicle registration laws and confirm the availability of the
correct fuel. (→P. 5 5 2 )
■For efficient use
●Select the D position when driving.
In the N position, the gasoline engine operates but electricity cannot be gener-
ated. The hybrid battery (traction battery) will discharge, requiring unnecessary
engine power to recharge.
●Drive your vehicle smoothly.
Avoid abrupt acceleration and deceleration. Gradual acceleration and decel-
eration will make more effective use of the electric motor (traction motor) with-
out having to use gasoline engine power.
●Avoid repeated acceleration.
Repeated acceleration consumes hybrid battery (traction battery) power,
resulting in poor acceleration. Battery power can be restored by driving with
the accelerator pedal slightly released.
●Select the P position when parking.
In the N position, the hybrid battery (traction battery) does not recharge.
Leaving the N position selected for an extended period of time may discharge
the hybrid battery. The vehicle cannot run if the hybrid battery is discharged.
■Environment-friendly driving
■Customization
Settings for the Eco Driving Indicator Light can be changed.
(Customizable features →P. 5 74 ) During environment-friendly acceleration
operation (Eco driving), the Eco Driving Indi-
cator Light will turn on. When the accelerator
pedal is depressed excessively, and when the
vehicle is stopped, the light turns off.
The Eco Driving Indicator Light will operate
when the vehicle is being driven with the shift
position in D. The indicator will not operate
when the vehicle is in power mode or EV
drive mode. (
→P. 1 5 0 ,
155)

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2-1. Driving procedures
HS250h_U_75033U(Canada)
■Operation of the “POWER” switch
●When operating the “POWER” switch, one short, firm press is enough. If the
switch is pressed improperly, the hybrid system may not start or the “POWER”
switch mode may not change. It is not necessary to press and hold the switch.
●If attempting to restart the hybrid system immediately after turning the
“POWER” switch off, the hybrid system may not start in some cases. After turn-
ing the “POWER” switch off, please wait a few seconds before restarting the
hybrid system.
■Automatically changing to P position
●When the shift position is in a position other than P, pressing the “POWER”
switch with the vehicle stopped completely will cause the shift position to
change to P automatically, and then the “POWER” switch will turn off.
●When turning the “POWER” switch off from a position other than P, firmly
depress the brake pedal and confirm that the shift position* has changed to P
before slowly releasing the brake pedal.
*: Even after the instrument panel display has been turned off, the shift positionindicator will continue to be displayed for several seconds.
●If the P position control system malfunctions, the “POWER” switch will not be
able to be turned off. In such a case, the switch can be turned off by applying the
parking brake.
When the system malfunctions, immediately have your vehicle serviced by your
Lexus dealer.
CAUTION
■When starting the hybrid system
Always start the hybrid system while sitting in the driver’s seat. Do not depress the
accelerator pedal while starting the hybrid system under any circumstances.
Doing so may cause an accident resulting in death or serious injury.
■Stopping the hybrid system in an emergency
If you want to stop the hybrid system in an emergency while driving the vehicle,
press and hold the “POWER” switch for more than 3 seconds.
However, do not touch the “POWER” switch while driving unless in an emergency.
If the hybrid system stops while driving, this could lead to an unexpected accident.

151
2-1. Driving procedures
2
When driving
HS250h_U_75033U(Canada)
■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.
●Engine coolant temperature is low.
●Vehicle speed is about 19mph (30km/h) or more.
●The hybrid battery (traction battery) is low.
An “Energy Monitor” display of level 3 or lower may indicate a low battery level.
( → P. 3 2 )
● 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.
■Automatic cancellation of EV drive mode
When driving in EV drive mode, the gasoline engine may automatically restart in
the following situations. When EV drive mo de 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 level 2
or lower. ( →P. 3 2 )
●Vehicle speed becomes more than about 19 mph (30 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 cancellation in advance, a prior
notice screen will appear on the multi-information display.
■ Possible driving distance when driving in EV drive mode
In EV drive mode, it is possible to drive up to about several hundred yards if driving
at a speed of about 19 mph (30 km/h) or less. (The distance that is possible
depends on the hybrid battery [traction battery] level and driving conditions.)

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2-1. Driving procedures
HS250h_U_75033U(Canada)
■Fuel economy
HS250h is designed to achieve the best possible fuel economy during normal driv-
ing (using the gasoline engine and electric motor [traction motor]). Driving in EV
drive mode more than necessary may lower fuel economy.
CAUTION
■Caution while driving
When driving in EV drive mode, pay special attention to the area around the vehi-
cle. 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.

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2-1. Driving procedures
HS250h_U_75033U(Canada)
■Shift position purpose
*: For good fuel economy and noise redu ction, the D position should usually
be used.
■ P position switch
The shift position can be changed to P through use of the P position
switch.
Fully stop the vehicle and keep
depressing the brake pedal, and
then press the P position switch.
When the shift position is
changed to P, the switch indica-
tor comes on.
Check that the P position indi-
cator is illuminated on the shift
position indicator.
●Changing the shift position from P to other positions:
• While depressing the brake pedal firmly, operate the shift lever. If the
shift lever is operated without depressing the brake pedal, the buzzer
will sound and the shifting operation will be disabled.
• The shift position cannot be changed from P to B directly.
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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2-1. Driving procedures
2
When driving
HS250h_U_75033U(Canada)
■Selecting a driving mode
The following modes can be selected to suit driving conditions:
Eco mode
Suitable for improving the fuel
economy, because the torque
corresponding to the accelera-
tor pedal depression amount
can be generated more
smoothly than it is in normal
conditions and the operation of
the air conditioning system will
be minimized.
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.

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2-1. Driving procedures
HS250h_U_75033U(Canada)
■For the shift positions
●When the “POWER” switch is off, the shift position cannot be changed.
●When the “POWER” switch is in ON mode, the shift position can only be
changed to N.
●When the “READY” indicator is on, the shift position can be changed from P to
D, N o r R .
●The shift position can only be changed to B directly from D.
In addition, if the shift position is changed in any of the following situations, the
buzzer will sound and the shifting operation will be disabled or the shift position will
automatically change to N. When this happens, select an appropriate shift position.
● Situations where the shifting operation will be disabled:
• When the shift lever is changed from P to another position without depress-
ing the brake pedal.
• When the shift position is changed from P or N to B.
● Situations where the shift position will automatically change to N:
• When the P position switch is pressed while the vehicle is running.
• When shift position R is selected when the vehicle is moving forward.
• When shift position D is selected when the vehicle is moving in reverse.
• When the shift position is changed from R to B.
■Reverse warning buzzer
When shifting into R, a buzzer will sound to inform the driver that the shift position is
in R.
■About engine braking
When shift position B is selected, releasing the accelerator pedal will apply engine
braking.
• When the vehicle is driven at high speeds, compared to ordinary gasoline- fueled vehicles, the engine braking deceleration is felt less than that of other
vehicles.
• The vehicle can be accelerated even when shift position B is selected.
If the vehicle is driven continuously in the B position, fuel efficiency will become low.
Usually, select the D position.

162
HS250h_U_75033U(Canada)
2-2. Instrument cluster
Gauges and meters
The following gauges and meters and display illuminate when the
“POWER” switch is in ON mode:
Hybrid System Indicator
Displays hybrid system output or regeneration level
Fuel gauge
Displays the quantity of fuel remaining in the tank
Shift position indicator
Displays the shift position
Speedometer
Displays the vehicle speed
Odometer/trip meter display change button
→P. 1 6 3
Odometer and trip meter display
Odometer: Displays the total distance that the vehicle has been
driven
Trip meter: Displays the distance the vehicle has been driven since the meter was last reset. Trip meters “A” and “B” can be
used to record and display different distances indepen-
dently.

166
2-2. Instrument cluster
HS250h_U_75033U(Canada)
■Indicators
The indicators inform the driver of the operating state of the vehi-
cle’s various systems.
Turn signal indicator
(→ P. 1 5 9 )“ECO MODE” indicator
(→ P. 1 5 5 )
(U.S.A.)
Headlight indicator
(→ P. 1 8 3 )“PWR MODE” indicator
(→ P. 1 5 5 )
(Canada)
Tail light indicator
(→ P. 1 8 3 )Cruise control indicator
(→ P. 201, 205)
Headlight high beam
indicator ( →P. 1 8 5 )
(if equipped)
Radar cruise control
indicator (→ P. 2 0 5 )
(if equipped)
Automatic High Beam
indicator
(→ P. 1 8 8 )
(if equipped)
“LKA” indicator
(→ P. 2 1 8 )
Front fog light indicator
(→ P. 1 9 4 )“SET” indicator
(→ P. 201, 205)
“READY” indicator
(→ P. 1 4 5 )
(if equipped)
Intuitive parking assist
indicator (Refer to “Navi-
gation System Owner’s
Manual”.)
EV drive mode indicator
(→ P. 1 5 0 )
(if equipped)
“AFS OFF” indicator
(→ P. 1 8 5 )
Eco Driving Indicator
Light ( →P. 1 3 8 )Slip indicator
(→ P. 226, 230)
*1
*1*1, 2