brake Lexus HS250h 2011 Do-it-yourself maintenance / LEXUS 2011 HS250H OWNERS MANUAL (OM75037U)

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1-8. Safety informationCorrect driving posture ............. 104
SRS airbags ..................................... 106
Front passenger occupant classification sy stem ................... 118
Child restraint systems ............... 123
Installing child re straints .............. 127
2-1. Driving procedures Driving the vehicle ........................ 138
Power (ignition) switch ............... 147
EV drive mode ............................... 152
Hybrid transmission ..................... 155
Turn signal lever .............................. 161
Parking brake ................................. 162
Horn.................................................... 163
2-2. Instrument cluster Gauges and meters ..................... 164
Indicators and warning lights................................................. 168
Multi-information display............ 172
Head-up display ............................ 178 2-3. Operating the lights and
windshield wipers
Headlight switch ............................ 186
Automatic High Beam .................. 191
Fog light switch .............................. 197
Windshield wipers and washer ............................................ 198
Headlight cleaner switch .......... 203
2-4. Using other driving systems Cruise control ............................... 204
Dynamic radar cruise control........................................... 208
LKA (Lane-Keeping Assist) ..... 221
Driving assist systems................. 229
Hill-start assist control ............... 234
Pre-Collision System.................. 236
2-5. Driving information Cargo and luggage ..................... 245
Vehicle load limits ........................ 248
Winter driving tips ....................... 249
Trailer towing ................................. 252
Dinghy towing ............................... 253
2When driving

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Pictorial indexInstrument panel
Headlight switch Turn signal lever Fog light switch P. 186
P. 161
P. 197
Tilt and telescopic steering
control switch
 P. 80
Pre-collision braking off switch  P. 237
Parking brake pedal P. 162
EV drive mode switch
“ECO MODE” switch
Power mode switch P. 152
P. 157
P. 157
Hood lock release lever P. 425
Tilt and telescopic steering control lever  P. 80
Glove box P. 368
Trunk opener
main switch
P. 61
Power (ignition) switch P. 147
Windshield wipers and
washer switch
P. 198
Gauges and meters
Multi-information display P. 164
P. 172
Audio system *2P. 266

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Installation of a mobile two-way radio system
As the installation of a mobile two-way radio system in your vehicle could affect
electronic systems such as the multiport fuel injection system/sequential multiport
fuel injection system, cruise control system, anti-lock brake system, SRS airbag sys-
tem and seat belt pretensioner system, be sure to check with your Lexus dealer for
precautionary measures or special instructions regarding installation.
High voltage parts and cables on the hybr id vehicles emit approximately the same
amount of electromagnetic waves as the conventional gasoline powered vehicles or
home electronic appliances despite of their electromagnetic shielding.
Unwanted noise may occur in the reception of the mobile two-way radio.
Scrapping of your Lexus
The SRS airbag and seat belt pretensioner devices in your Lexus contain explosive
chemicals. If the vehicle is scrapped with the airbags and seat belt pretensioners left
as they are, this may cause an accident such as fire. Be sure to have the systems of
the SRS airbag and seat belt pretensioner removed and disposed of by a qualified
service shop or by your Lexus deal er before you scrap your vehicle.
Perchlorate Material
Special handling may apply, See www.d tsc.ca.gov/hazardouswaste/perchlorate.
Your vehicle has components that may contain perchlorate. These components may
include airbag, seat belt pretensioners, and wireless remote control batteries.

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1-1. Hybrid system
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Before driving
■Regenerative braking
In the following situations, kinetic energy is converted to electric energy and decel-
eration force can be obtained in conjunction with the recharging of the hybrid bat-
tery (traction battery).
●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.
■Conditions in which the gasoline engine may not stop
The gasoline engine starts and stops automatically. However, it may not stop auto-
matically in the following conditions:
●During gasoline engine warm-up
●During hybrid battery (traction battery) charging
●When the temperature of the hybrid battery (traction battery) is high or low
●When the heater is switched on
*: However, when the hybrid battery (traction battery) need to be
charged or while the engine is being warmed up, the gasoline
engine may not stop automatically.
■ During normal driving
The gasoline engine is predomina ntly used. The electric motor
(traction motor) charges the hybrid battery as necessary.
■ When accelerating sharply
The power of the hybrid battery (tract ion battery) is added to that of
the gasoline engine via the electric motor (traction motor).
■ When braking (regenerative braking)
The electric motor (traction moto r) charges the hybrid battery
(traction battery).

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1-1. Hybrid system
■Charging the battery
As the gasoline engine charges the hybrid battery (traction battery), the battery
does not need to be charged from an outside source. However, if the vehicle is left
parked for a long time the hybrid battery will slowly discharge. For this reason, be
sure to drive the vehicle at least once every few months for at least 30 minutes or
10 miles (16 km). If the hybrid battery becomes fully discharged and you are unable
to jump-start the vehicle with the 12-v olt battery, contact your Lexus dealer.
■After the 12-volt battery has discharged or has been changed or removed
The gasoline engine may not stop even if the vehicle is running on the hybrid battery
(traction battery). If this continues for a few days, contact your Lexus dealer.
■Sounds and vibrations specific to a hybrid vehicle
There may be no engine sounds or vibrat ion 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 fr om the engine compartment.
●Sounds may be heard from the hybrid ba ttery (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 regenera tive 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 system 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
seatback.
When driving in Eco drive mode, the fan noise may be louder than when driving
normally.

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1-1. Hybrid system
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Before driving
CAUTION
■High voltage precautions
The vehicle has high voltage DC and AC systems as well as a 12-volt system. DC
and AC high voltage is very dangerous and can cause severe burns and electric
shock that may result in death or serious injury.
●Never touch, disassemble, remove or replace the high voltage parts, cables or
their connectors.
●The hybrid system will become hot after starting as the system uses high voltage.
Be careful of both the high voltage and the high temperature, and always obey
the caution labels attached to the vehicle.
■Road accident cautions
Observe the following precautions to reduce the risk of death or serious injury:
●Pull your vehicle off the road, change the shift position to P, apply the parking
brake, and turn the hybrid system off.
●Do not touch the high voltage parts, cables and connectors.
●If electric wires are exposed inside or outside your vehicle, an electric shock may
occur. Never touch exposed electric wires.
●If a fluid leak occurs, do not touch the flui d as it may be strong alkaline electrolyte
from the hybrid battery (traction battery). If it comes into contact with your skin or
eyes, wash it off immediately with a large amount of water or, if possible, boric
acid solution. Seek immediate medical attention.
●If a fire occurs in the hybrid vehicle, le ave the vehicle as soon as possible. Never
use a fire extinguisher that is not meant for electric fires. Using even a small
amount of water may be dangerous.
●Never try to open the service plug access
hole located in the luggage compartment.
The service plug is used only when the
vehicle is serviced an d is subject to high
voltage.

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1-1. Hybrid system
Hybrid vehicle driving tips
For economical and ecological driving, pay attention to the following
points:
■Using Eco drive mode
When using Eco drive mode, the torq ue corresponding to the accelerator
pedal depression amount can be generated more smoothly than it is in
normal conditions. In addition, the op eration of the air conditioning system
(heating/cooling) will be minimized, improving the fuel economy.
( P. 1 5 7 )
■Use of Hybrid System Indicator
The environmentally-friendly driving is possible by keeping the indicate of
Hybrid System Indicator within Eco area. ( P. 1 6 6 )
■When braking the vehicle
Make sure to operate the brakes ge ntly and in good time. A greater
amount of electrical energy can be retained when slowing down.
■ Delays
Repeated acceleration and deceleration, as well as long waits at traffic
lights, will lead to bad fu el consumption. Check traffic reports before leav-
ing and avoid delays as much as possible. When encountering a delay,
gently release the brake pedal to allow the vehicle to move forward slightly
while avoiding overuse of the accelerato r pedal. Doing so can help control
excessive gasoline consumption.
■ Highway driving
Control your speed and keep at a constant speed. Also, before stopping at
a toll booth or similar, allow plenty of time to release the accelerator and
gently apply the brakes. A greater amount of electrical energy can be
retained when slowing down.

When driving2
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2-1. Driving proceduresDriving the vehicle.................. 138
Power (ignition) switch .......... 147
EV drive mode.......................... 152
Hybrid transmission ............... 155
Turn signal lever ........................ 161
Parking brake ........................... 162
Horn ............................................ 163
2-2. Instrument cluster Gauges and meters ................ 164
Indicators and warning lights ......................................... 168
Multi-information display ..... 172
Head-up display ...................... 178
2-3. Operating the lights and windshield wipers
Headlight switch...................... 186
Automatic High Beam ............ 191
Fog light switch ........................ 197
Windshield wipers and washer ..................................... 198
Headlight cleaner switch.... 203 2-4. Using other driving systems
Cruise control......................... 204
Dynamic radar cruise control .................................... 208
LKA (Lane-Keeping Assist) ........ 221
Driving assist systems ........... 229
Hill-start assist control ......... 234
Pre-Collision System ............ 236
2-5. Driving information Cargo and luggage ............... 245
Vehicle load limits .................. 248
Winter driving tips ................. 249
Trailer towing .......................... 252
Dinghy towing ......................... 253

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2-1. Driving procedures
Driving the vehicle
The following procedures should be observed to ensure safe driving:
■Starting the hybrid system
 P. 1 4 7
■ Driving
With the brake pedal depressed, select the D position.
(P. 155)
Check that the shift position indicator shows D.
Release the parking brake. ( P. 162)
Gradually release the brake pedal and gently depress the
accelerator pedal to accelerate the vehicle.
■ Stopping
With the D position illuminated on the shift position indicator,
depress the brake pedal.
If necessary, set the parking brake.
If the vehicle will be stopped for an extended period of time, select
the P position. (
P. 1 5 5 )
■ Parking the vehicleStop the vehicle by depressing the brake pedal.
Set the parking brake. ( P. 162)
If parking on a hill, block the wheels as needed.
Press the P position switch to shift into P. ( P. 1 5 6 )
Check that the shift position indicator shows P. ( P. 1 5 5 )
Press the “POWER” switch to stop the hybrid system.
Slowly release the brake pedal and check that the indicator on
the “POWER” switch is off.
Lock the door, making sure that you have the electronic key on
your person.

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2-1. Driving procedures
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When driving
Starting off on a steep uphillMake sure that the pa rking brake is set secu rely, and then select
shift position D.
Check that the shift position indicator shows D.
Gently depress the accelerator pedal.
Release the parking brake.
■Driving in the rain
●Drive carefully when it is raining, becaus e visibility will be reduced, the windows
may become fogged-up, and the road will be slippery.
●Drive carefully when it starts to rain, be cause the road surface will be especially
slippery.
●Refrain from high speeds when driving on an expressway in the rain, because
there may be a layer of water between th e tires and the road surface, preventing
the steering and brakes from operating properly.
■Breaking in your new Lexus
To extend the life of the vehicle, observing the following precautions is recom-
mended:
●For the first 186 miles (300 km):
Avoid sudden stops.
●For the first 994 miles (1600 km):
• Do not drive at extremely high speeds.
• Avoid sudden acceleration.
• Do not drive at a constant speed for extended periods.
■Drum-in-disc type parking brake system
Your vehicle has a drum-in-disc type parking brake system. This type of brake sys-
tem needs bedding-down of the brake shoes periodically or whenever the parking
brake shoes and/or drum are replaced. Have your Lexus dealer perform the bed-
ding down operation.