2012 Lexus HS250h ECU

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2-1. Driving procedures
2
When driving
HS250h_U_75050U
CAUTION
●After driving through a puddle, lightly depress the brake pedal to make sure that
the brakes are functioning properly. Wet brake pads may prevent the brakes from
functioning properly. If the brakes on only one side are wet and not functioning
properly, steering control may be affected, resulting in an accident.
■When changing the shift position
Be careful not to change the shift position with the accelerator pedal depressed.
Changing the shift position to any positions other than P or N may cause the vehicle
to accelerate abruptly, causing an accident and resulting in death or serious injury.
After changing the shift position, make sure to confirm the current shift position dis-
played on the shift position indicator inside the meter.
■If you hear a squealing or scraping noise (brake pad wear limit indicators)
Have your Lexus dealer check and replace the brake pads as soon as possible.
Rotor damage may result if the pads are not replaced when needed.
It is dangerous to drive the vehicle when the wear limits of the brake pads and/or
those of the brake discs are exceeded.
■When the vehicle is stopped
●Do not depress the accelerator pedal unnecessarily.
If the vehicle is in any shift position other than P or N, the vehicle may accelerate
suddenly and unexpectedly, causing an accident.
●Do not leave the vehicle with the hybrid system on for a long time.
If such a situation cannot be avoided, park the vehicle in an open space and
check that exhaust fumes do not enter the vehicle interior.
●In order to prevent accidents due to the vehicle rolling away, always keep
depressing the brake pedal while the “READY” indicator is on. Apply the parking
brake as necessary.
●If the vehicle is stopped on an incline, in order to prevent accidents caused by the
vehicle rolling forward or backward, always depress the brake pedal and securely
apply the parking brake as needed.
●Avoid revving or racing the engine.
Running the engine at high speed while the vehicle is stopped may cause the
exhaust system to overheat, which could result in a fire if combustible material is
nearby.

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2-1. Driving procedures
2
When driving
HS250h_U_75050U
CAUTION
■Exhaust gases
Exhaust gases include harmful carbon monoxide (CO), which is colorless and
odorless. Inhaling exhaust gases may lead to death or a serious health hazard.
●If the vehicle is in a poorly ventilated area, stop the hybrid system. In a closed
area, such as a garage, exhaust gases may collect and enter the vehicle. This may
lead to death or a serious health hazard.
●The exhaust system should be checked occasionally. If there is a hole or crack
caused by corrosion, damage to a joint or abnormal exhaust noise, be sure to
have the vehicle inspected and repaired by your Lexus dealer. Failure to do so
may allow exhaust gases to enter the vehicle, resulting in death or a serious health
hazard.
■When taking a nap in the vehicle
Always turn the hybrid system off. Otherwise, if you accidentally move the shift
lever or depress the accelerator pedal, this could cause an accident or fire due to
hybrid system overheating. Additionally, if the vehicle is parked in a poorly venti-
lated area, exhaust gases may collect and enter the vehicle, leading to death or a
serious health hazard.
■When braking
●When the brakes are wet, drive more cautiously.
Braking distance increases when the brakes are wet, and this may cause one side
of the vehicle to brake differently than the other side. Also, the parking brake may
not securely hold the vehicle.
●If the power brake assist function does not operate, do not follow other vehicles
closely and avoid downhill or sharp turns that require braking.
In this case, braking is still possible, but it will require more force on the pedal than
usual. Braking distance may also increase.
●The brake system consists of 2 individual hydraulic systems; if one of the systems
fails, the others will still operate. In this case, the brake pedal should be depressed
more firmly than usual and the braking distance will increase. If this happens, do
not continue to drive the vehicle. If the brake system warning light (red indicator)
comes on while driving, immediately stop the vehicle in a safe place and contact
your Lexus dealer.

168
2-1. Driving procedures
HS250h_U_75050U
Horn
■After adjusting the steering wheel (manually adjustable type only)
Make sure that the steering wheel is securely locked.
The horn may not sound if the steering wheel is not securely locked. (→P. 8 3 )
To sound the horn, press on or
close to the mark.

193
2-3. Operating the lights and windshield wipers
2
When driving
HS250h_U_75050U
Turning on the high beam headlightsWith the headlights on, push the
lever away from you to turn on
the high beams.
When the light switch is in
position, the Automatic High Beam
system will be activated. (→P. 1 9 6 )
Pull the lever toward you to the
center position to turn the high
beams off.
Pull the lever toward you and
release it to flash the high beams
once.
You can flash the high beams with
the headlights on or off.
AFS (Adaptive Front-lighting System) (if equipped)
AFS (Adaptive Front-lighting System) secures excellent visibility at inter-
sections and on curves by automatically adjusting the direction of the
light axis of the headlights according to vehicle speed and the degree of
the tire’s angle as controlled by steering input.
AFS operates at speeds of 6 mph (10 km/h) or higher.
■ Deactivating AFS
Press the menu switch.
The multi-information display will
change modes to electronic fea-
ture control mode.
Press the “ENTER” switch
upwards or downwards until
AFS appears.

202
2-3. Operating the lights and windshield wipers
HS250h_U_75050U
Fog light switch
The fog lights secure excellent visibility in difficult driving conditions, such
as in rain and fog.
Type ATurns the front fog
lights off
Turns the front fog
lights on

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HS250h_U_75050U
2-5. Driving information
Cargo and luggage
Capacity and distributionCargo capacity depends on the total weight of the occupants.
(Cargo capacity) = (Total load cap acity) — (Total weight of occupants)
Steps for Determining Correct Load Limit 
(1) Locate the statement “The combined weight of occupants and cargo should never exceed XXX kg or XXX lbs.” on your vehicle’s placard.
(2) Determine the combined weight of the driver and passengers that will be riding in your vehicle.
(3)Subtract the combined weight of the driver and passengers from XXX kg or XXX lbs.
(4) The resulting figure equals the available amount of cargo and luggage load capacity.
For example, if the “XXX” amount equals 1400 lbs. and there will be
five 150 lb passengers in your vehicle, the amount of available cargo
and luggage load capacity is 650 lbs. (1400 − 750 (5 × 150) = 650
lbs.)
(5)Determine the combined weight of luggage and cargo being loaded on the vehicle. That weight may not safely exceed the available cargo
and luggage load capacity calculated in Step 4.
Take notice of the following information about storage precautions, cargo
capacity and load:
●Stow cargo and luggage in the trunk whenever possible.
● Be sure all items are secured in place.
● To maintain vehicle balance while driving, position luggage evenly
within the luggage compartment.
● For better fuel economy, do not carry unnecessary weight.

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2-5. Driving information
HS250h_U_75050U
CAUTION
■Things that must not be carried in the trunk
The following things may cause a fire if loaded in the trunk:
●Receptacles containing gasoline
●Aerosol cans
■Storage precautions
Observe the following precautions.
Failing to do so may result in death or serious injury.
●Stow cargo and luggage in the trunk whenever possible.
●Do not place cargo or luggage in or on the following locations as the item may
get under the brake or accelerator pedal and prevent the pedals from being
depressed properly, block the driver’s vision, or hit the driver or passengers,
causing an accident:
• At the feet of the driver
• On the front passenger or rear seats (when stacking items)
• On the package tray
• On the instrument panel
•On the dashboard
●Secure all items in the occupant compartment, as they may shift and injure some-
one during sudden braking, sudden swerving or an accident.
■Capacity and distribution
●Do not exceed the maximum axle weight rating or the total vehicle weight rating.
●Even if the total load of occupant’s weight and the cargo load is less than the total
load capacity, do not apply the load unevenly. Improper loading may cause dete-
rioration of steering or braking control which may cause death or serious injury.

Interior features3
265
HS250h_U_75050U
3-3. Using the Bluetooth® audio
system
Bluetooth
® audio system ... 325
Using the Bluetooth® audio
system .................................... 328
Operating a Bluetooth
®
enabled portable player... 333
Setting up a Bluetooth
®
enabled portable player.... 336
Bluetooth
® audio system
setup ......................................... 341
3-4. Using the hands-free phone system (for cellular phones)
Hands-free system for cellular phones..................... 342
Using the hands-free system (for cellular phones) ........... 346
Making a phone call .............. 354
Setting a cellular phone ....... 359
Security and system setup ........................................ 364
Using the phone book.......... 368
3-5. Using the interior lights Interior lights list ..................... 374
• Interior lights ........................ 375
• Personal lights ...................... 375 3-6. Using the storage features
List of storage features.......... 377
• Glove box .............................. 378
• Console box ......................... 379
• Cup holders ........................... 381
• Bottle holders....................... 383
• Auxiliary boxes .................... 384
3-7. Other interior features Sun visors ................................. 385
Vanity mirrors ......................... 386
Clock ......................................... 387
Power outlets .......................... 388
Seat heaters and ventilators ............................. 389
Armrest ..................................... 391
Rear sunshade ........................ 392
Floor mat .................................. 394
Trunk compartment features .................................. 396
Garage door opener ............ 398
Compass .................................. 404
Safety Connect ...................... 408