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

TABLE OF CONTENTSIndex
6
5-1. Essential informationEmergency flashers.................... 488
If your vehicle needs to be towed ...................................... 489
If you think something is wrong ............................................. 495
Event data recorder .................... 496
5-2. Steps to take in an emergency If a warning light turns on or a warning buzzer
sounds... ........................................ 498
If a warning message is displayed ....................................... 507
If you have a flat tire..................... 527
If the hybrid system will not start ................................................. 537
If you lose your keys ................... 539
If the electronic key does not operate properly .............. 540
If the vehicle 12-volt battery is discharged ............................... 543
If your vehicle overheats .......... 548
If the vehicle becomes stuck................................................ 552
If your vehicle has to be stopped in
an emergency ............................ 554 6-1. Specifications
Maintenance data (fuel, oil level, etc.).................... 556
Fuel information ........................... 565
Tire information............................ 568
6-2. Customization Customizable features.............. 580
6-3. Initialization Items to initialize ........................... 592
Reporting safety defects for U.S. owners........................... 594
Seat belt instructions for Canadian owners
(in French) ................................... 595
SRS airbag instructions for Canadian owners
(in French) .................................... 597
5When trouble arises6Vehicle specifications
7For owners

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1-1. Hybrid system
Hybrid system
Your vehicle is a hybrid vehicle. It has characteristics different from con-
ventional vehicles. Be sure you are clos ely 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 effi-
ciency and reducing exhaust emissions.
Gasoline engine
Electric motor (Traction motor)
■ When stopped/during start off
The gasoline engine stops* when the vehicle is stopped. During
start off, the electric motor (traction motor) drives the vehicle. At
slow speeds or when traveling down a gentle slope, the engine is
stopped* and the motor is used.
When shift position N is selected, the hybrid battery (traction bat-
tery) will not be charged. Thus, sele ct P when the vehicle is stopped.
In addition, when driving in heavy traffic, use D or B.

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1-1. Hybrid system
1
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.

29
1-1. Hybrid system
1
Before driving
Hybrid battery air ventThere is an air intake vent on the
side of the rear left seatback for
the purpose of cooling the hybrid
battery (traction battery). If the
vent become blocked, the hybrid
battery may overheat, leading to a
reduction in hybrid battery output.
Emergency shut off system When a certain level of impact is detected by the impact sensor, the
emergency shut off system blocks off the high voltage current and stops
the fuel pump to minimize the risk of electrocution and fuel leakage. If the
emergency shut off system activates, your vehicle will not restart. To
restart the hybrid system, contact your Lexus dealer.
Hybrid warning message
A message is automatically displayed when a malfunction occurs in the
hybrid system or an impr oper operation is attempted.
If a warning message is shown on
the multi-information display, read
the message and follow the
instructions.
(P. 507)

53
1-3. Opening, closing and locking the doors
1
Before driving
Depending on the position and holding condition of the electronic key, the key may
not be detected correctly and the system may not operate properly. (The alarm may
go off accidentally, or the door lock prevention may not operate.)
■If the smart access system with push-button start does not operate properly
●Locking and unlocking the doors, unlock ing the trunk: Use the mechanical key.
(  P. 5 4 0 )
●Starting the hybrid system:  P. 5 4 1
■Electronic key battery depletion
●The standard battery life is 1 to 2 years. (The card key battery life is about a year
and a half.)
●If the battery becomes low, an alarm will sound in the cabin when the hybrid sys-
tem stops. (P. 4 9 )
●As the electronic key always transmits radio waves, the battery will become
depleted even if the electronic key is not used. The following symptoms indicate
that the electronic key battery may be depleted. Replace the battery when nec-
essary. ( P. 4 5 9 )
• The smart access system with push-but ton start or the wireless remote con-
trol does not operate.
• The detection area becomes smaller.
• The LED indicator on the key surface does not turn on.
●To avoid serious deterioration, do not leave the electronic key within 3 ft. (1 m) of
the following electrical appliances that produce a magnetic field:
•TVs
• Personal computers
• Cellular phones, cordless phones and battery chargers
• Recharging cellular phones or cordless phones
•Glass top ranges
• Table lamps
■When the electronic key battery is fully depleted
 P. 4 5 9
■Customization
Settings (e.g. smart access system with push-button start) can be changed.
(Customizable features  P. 5 8 0 )

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1-5. Opening and closing the windows and moon roof
■The power windows can be operated when
The “POWER” switch is in ON mode.
■Operating the power windows after turning the hybrid system off
The power windows can be operated for approximately 43 seconds even after the
“POWER” switch is turned to ACCESSORY mode or turned off. They cannot,
however, be operated once either front door is opened.
■Jam protection function
If an object becomes caught between the window and the window frame, window
travel is stopped and the window is opened slightly.
■When the power window does not close normally
If the jam protection function is oper ating abnormally and a window cannot be
closed, perform the following operations using the power window switch on the rel-
evant door.
●After stopping the vehicle, the window can be closed by holding the power win-
dow switch in the one-touch closing position while the “POWER” switch is
turned to ON mode.
●If the window still cannot be closed even by carrying out the operation
explained above, initialize the function by performing the following procedure.
Hold the power window switch in the one-touch closing position. Con-
tinue holding the switch for a further 6 seconds after the window has
closed.
Hold the power window switch in the one-touch opening position. Con-
tinue holding the switch for a further 2 seconds after the window has
opened completely.
Hold the power window switch in the one-touch closing position once
again. Continue holding the switch for a further 2 seconds after the win-
dow has closed.
If you release the switch while the window is moving, start again from the beginning.
If the window continues to close but then re-open slightly even after performing the
above procedure correctly, have the vehicle inspected by your Lexus dealer.

98
1-7. Theft deterrent system
Immobilizer system
The vehicle’s keys have built-in transponder chips that prevent the hybrid
system from starting if a key has not been previously registered in the vehi-
cle’s on-board computer.
Never leave the keys inside the vehicle when you leave the vehicle.
Without navigation systemThe indicator light flashes after
the “POWER” switch has been
turned off to indicate that the
system is operating.
The indicator light stops flashing
after the “POWER” switch has
been turned to ACCESSORY
or ON mode to indicate that the
system has been canceled.
With navigation system The indicator light flashes after
the “POWER” switch has been
turned off to indicate that the
system is operating.
The indicator light stops flashing
after the “POWER” switch has
been turned to ACCESSORY
or ON mode to indicate that the
system has been canceled.

101
1-7. Theft deterrent system
1
Before driving
■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 deactivate 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.)

138
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.