2010 Lexus HS250h air conditioning

TABLE OF CONTENTS
1
1Before driving
Information on the hybrid system and adjusting and operat-
ing features such as door locks, mirrors, and steering col-
umn
2When drivingDriving, stopping and safe-driving information
3Interior featuresAir conditioning and audio systems, as well as other interior
features for a comfortable driving experience
4Maintenance
and careCleaning and protecting your vehicle, performing do-it-your-
self maintenance, and maintenance information
5When trouble
arisesWhat to do if the vehicle needs to be towed, gets a flat tire,
or is involved in an accident
6Vehicle 
specificationsDetailed vehicle information
7For ownersReporting safety defects for U.S. owners and seat belt in-
structions for Canadian owners
IndexAlphabetical listing of inform ation contained in this manual

1
2
3
4
5
6
7
3
Horn...................................................... 161
2-2. Instrument cluster Gauges and meters ..................... 162
Indicators and warning 
lights................................................. 165
Multi-information display........... 169
Head-up display ............................ 175
2-3. Operating the lights and 
windshield wipers
Headlight switch ............................ 183
Automatic High Beam ................ 188
Fog light switch .............................. 194
Windshield wipers and 
washer............................................. 195
Headlight cleaner switch ......... 200
2-4. Using other driving systems Cruise control ................................ 201
Dynamic radar cruise 
control........................................... 205
LKA (Lane-Keeping Assist) ...... 217
Driving assist systems................. 225
Hill-start assist control............... 230
Pre-Collision System.................. 232 2-5. Driving information
Cargo and luggage ..................... 240
Vehicle load limits ........................ 243
Winter driving tips ....................... 244
Trailer towing ................................. 247
Dinghy towing ............................... 248
3-1. Using the air conditioning system and defogger
Automatic air conditioning 
system ............................................ 252
Rear window defogger 
switch ............................................. 260
Windshield wiper de-icer .......... 261
3-2. Using the audio system Audio system ................................. 262
Using the radio.............................. 265
Using the CD player................... 273
Playing MP3 and WMA 
discs ................................................. 281
Operating an iPod
® 
player............................................. 288
Operating a USB memory 
player.............................................. 296
Optimal use of the audio 
system ........................................... 304
Using the AUX adapter ............ 307
Using the steering wheel 
audio switches ........................... 308
3Interior features

1
2
3
4
5
6
7
5
4-2. MaintenanceMaintenance 
requirements.............................. 409
General maintenance ................... 411
Emission inspection and 
maintenance (I/M) 
programs ....................................... 415
4-3. Do-it-yourself maintenance Do-it-yourself service 
precautions ................................... 416
Hood................................................... 419
Positioning a floor jack............... 420
Engine compartment.................. 422
12-volt battery................................ 433
Tires ................................................... 437
Tire inflation pressure................. 445
Wheels.............................................. 448
Air conditioning filter................. 450
Electronic key battery ................ 453
Checking and replacing 
fuses ................................................ 455
Headlight aim 
(LED headlights) ....................... 467
Light bulbs ....................................... 469 5-1. Essential information
Emergency flashers .................... 482
If your vehicle needs to be 
towed ............................................ 483
If you think something is 
wrong ............................................ 489
Event data recorder.................... 490
5-2. Steps to take in an emergency If a warning light turns on 
or a warning buzzer 
sounds... ......................................... 492
If a warning message is 
displayed........................................ 501
If you have a flat tire...................... 521
If the hybrid system will not 
start ................................................ 530
If you lose your keys .................... 532
If the electronic key does 
not operate prop erly ............... 533
If the vehicle 12-volt battery 
is discharged ............................... 536
If your vehicle overheats ............ 541
If the vehicle becomes 
stuck................................................ 545
5When trouble arises

15
Without navigation system
: If equipped
*1: Refer to “Navigation System Owner's Manual”.*2: For vehicles with a navigation system, refe r to the “Navigation System Owner’s Manual”.
Rear window and
outside rear view
mirror defogger
switch
P. 260Emergency flasher
switch
P. 482
Security indicator

P. 96, 98
Clock P. 373
Air 
conditioning 
system
P. 252
With navigation system
Navigation system
*1
Air conditioning 
system
*1
Emergency flasher
switch
P. 482Clock*1
Security indicator 

P. 96, 98
Rear window and out-
side rear view mirror
defogger switch
*1

27
1
1-1. Hybrid system
Before driving
Hybrid system precautions
Take care when handling the hybrid system, as it contains a high voltage
system (about 650V at maximum) as well as parts that become extremely
hot when the hybrid system is operatin g. Obey the caution labels attached
to the vehicle.
Air conditioning compressor
Power control unit
Hybrid battery (traction bat-
tery) and DC/DC converter
Service plug High voltage cables (orange)
Electric motor (traction motor)
Caution label

37
1
1-1. Hybrid system
Before driving
Hybrid vehicle driving tips
For economical and ecological driving, pay attention to the following
points:
■ Using Eco Mode
When using Eco mode, the torque corresponding to the accelerator pedal
depression amount can be generated more smoothly than it is in normal
conditions. In addition, the operation of the air conditioning system will be
minimized, improving the fuel economy. 
( P. 1 5 5 )
■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 4 )
■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 fuel consumpt ion. Check traffic reports before leav -
ing and avoid delays as much as possible. When encountering a delay,
gentl
y 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.

38
1-1. Hybrid system
■Air conditioning
Use the air conditioning only when necessary. Doing so can help control
excessive gasoline consumption. 
In summer: In high temperatures, use the r
ecirculated air mode. Doing so
will help to reduce the burden on the air conditioner and reduce fuel con -
sumption as well. 
In winter: Because the gasoline engine will not automatically cut out until
the gasoline
engine and the interior of the vehicle are warm, it will con -
sume fuel. Also, fuel consumption can be impr
oved by avoiding overuse of
the heater.
■ Checking tire inflation pressure
Make sure to check the tire inflatio n pressure frequently. Improper tire
inflation pressure can cause poor fuel consumption. 
Also, as snow tires can cause large amounts of friction, their use on dry
r
oads can lead to poor fuel consumptio n. Use a tire that is appropriate for
the season.
■ Luggage
Carrying heavy luggage can lead to poor fuel consumption. Avoid carry-
ing unnecessary luggage. Installing a la r
ge roof rack can also cause poor
fuel consumption.
■ Warming up before driving
Since the gasoline engine starts up and cuts out automatically when cold,
warming up the engine is unnecessary. Moreover, frequently driving short
distances will cause the engine to repeatedly warm up, which can lead to
poor fuel consumption.

155
2-1. Driving procedures
2
When driving
■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 gener
ated 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
pr
essed, the “ECO MODE”
indicator comes on in the meter.
Power mode
Suitable when the vehicle needs
to drive powerfully or travels in
mountainous areas.
When the power mode switch is
pr
essed, the “PWR MODE”
indicator comes on in the meter.