2013 Lexus IS300h heating

2964-5. Using the driving support systems
IS300h_EE(OM53B95E)
When the 12-volt battery is disconnected
The steering wheel may move from its straight forward position, but this will be
corrected automatically when driving.
Sounds and vibrations caused by the ABS, brake assist, TRC, VSC, hill-start
assist control systems
A sound may be heard from the engine compartment when the brake pedal is
depressed repeatedly, when the hybrid system is started or just after the vehicle
begins to move. This sound does not indicate that a malfunction has occurred in
any of these systems.
Any of the following conditions may occur when the above systems are operat-
ing. None of these indicates that a malfunction has occurred.
• Vibrations may be felt through the vehicle body and steering.
• A motor sound may be heard after the vehicle comes to a stop.
EPS operation sound
When the steering wheel is operated, a motor sound may be heard. This does not
indicate a malfunction.
Reactivation of the TRC/VSC systems
Even after the TRC/VSC systems have been turned off, turning the hybrid sys-
tem off and then on again will automatically reactivate the TRC/VSC systems.
Reactivation of the TRC system linked to vehicle speed
When only the TRC system is turned off, the TRC system will turn on when
vehicle speed increases. However, when both TRC and VSC systems are turned
off, the systems will not turn on even when vehicle speed increases.
Reduced effectiveness of the EPS system
The effectiveness of the EPS system is reduced to prevent the system from over-
heating when there is frequent steering input over an extended period of time.
The steering wheel may feel heavy as a result. Should this occur, refrain from
excessive steering input or stop the vehicle and turn the hybrid system off. The
EPS system should return to normal within 10 minutes.

309
4
Driving
IS300h_EE(OM53B95E)4-6. Driving tips
Using Eco drive mode
When using Eco drive mode, the torque corresponding to the accelera-
tor pedal depression amount can be generated more smoothly than it is
in normal conditions. In addition, the operation of the air conditioning
system (heating/cooling) will be minimized, improving the fuel econ-
omy. (P. 290)
Use of Hybrid System Indicator
Eco-friendly driving is possible by keeping the indicator needle
(except F SPORT models) or bar display (F SPORT models) of Hybrid
System Indicator within the Eco area. (P. 1 1 4 )
When braking
Make sure to operate the brakes gently and in good time. A greater
amount of electrical energy can be regenerated when slowing down.
Delays
Repeated acceleration and deceleration, as well as long waits at traffic
lights, will lead to bad fuel economy. Check traffic reports before leav-
ing and avoid delays as much as possible. When driving in a traffic
jam, gently release the brake pedal to allow the vehicle to move for-
ward slightly while avoiding overuse of the accelerator pedal. Doing so
can help control excessive gasoline consumption.
Highway driving
Control your speed and keep at a constant speed. 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
regenerated when slowing down.
Hybrid vehicle driving tips
For economical and ecological driving, pay attention to the following
points:

4076-1. Using the air conditioning system
6
Interior features
IS300h_EE(OM53B95E)
Registering air conditioning settings to electronic keys (vehicles with driving
position memory)
Unlocking the vehicle using an electronic key and turning the power switch to
ON mode will recall that key’s registered air conditioning settings.
When the power switch is turned off, the current air conditioning settings will
automatically be registered to the electronic key that was used to unlock the
vehicle.
The system may not operate correctly if more than one electronic key is in the
vicinity or if the smart entry & start system is used to unlock a passenger door.
The doors that can recall the air conditioning setting when unlocked using the
smart entry & start system can be changed.* For details, contact any authorized
Lexus dealer or repairer, or another duly qualified and equipped professional.
*: The doors that can recall the driving position memory are changed at the same
time.
Using automatic mode
Fan speed is adjusted automatically according to the temperature setting and the
ambient conditions.
Therefore, the fan may stop for a while until warm or cool air is ready to flow
immediately after is pressed or “AUTO” is selected.
Fogging up of the windows
The windows will easily fog up when the humidity in the vehicle is high. Turning
(“A/C”) on will dehumidify the air from the outlets and defog the wind-
shield effectively.
If you turn (“A/C”) off, the windows may fog up more easily.
The windows may fog up if the recirculated air mode is used.
Outside/recirculated air mode
When driving on dusty roads such as tunnels or in heavy traffic, set the outside/
recirculated air mode button to the recirculated air mode. This is effective in
preventing outside air from entering the vehicle interior. During cooling opera-
tion, setting the recirculated air mode will also cool the vehicle interior effec-
tively.
Outside/recirculated air mode may automatically switch depending on the tem-
perature setting or the inside temperature.
Operation of the air conditioning system in Eco drive mode
In Eco drive mode, the air conditioning system is controlled as follows to priori-
tize fuel efficiency:
Engine speed and compressor operation controlled to restrict heating/cooling
capacity
Fan speed restricted when automatic mode is selected
To improve air conditioning performance, perform the following operations:
Adjust the fan speed
Turn off Eco drive mode

4096-1. Using the air conditioning system
6
Interior features
IS300h_EE(OM53B95E)
Turn the heated steering wheel on/
off
The indicator light comes on when
the heated steering wheel is operat-
ing.
Heated steering wheel/seat heaters/seat ventilators

: If equipped
Heated steering wheel and seat heaters heat the side grips of the steering
wheel and seats, respectively. Seat ventilators maintain good airflow by
blowing air from the seats.
CAUTION
Care should be taken to prevent injury if anyone in the following categories
comes in contact with the steering wheel and seats when the heater is on:
• Babies, small children, the elderly, the sick and the physically challenged
• Persons with sensitive skin
• Persons who are fatigued
• Persons who have taken alcohol or drugs that induce sleep (sleeping drugs,
cold remedies, etc.)
Observe the following precautions to prevent minor burns or overheating,
• Do not cover the seat with a blanket or cushion when using the seat heater.
• Do not use seat heater more than necessary.
NOTICE
Do not put heavy objects that have an uneven surface on the seat and do not
stick sharp objects (needles, nails, etc.) into the seat.
To prevent 12-volt battery discharge, do not use the functions when the hybrid
system is off.
Heated steering wheel

5568-2. Steps to take in an emergency
IS300h_EE(OM53B95E)
The needle of the engine coolant temperature gauge (P. 110) enters
the red zone or a loss of hybrid system power is experienced. (For
example, the vehicle speed does not increase.)
“Hybrid System Overheat” is shown on the multi-information display.
Steam comes out from under the hood.
If the needle of the engine coolant temperature gauge enters the red
zone
Stop the vehicle in a safe place and turn off the air conditioning sys-
tem, and then stop the hybrid system.
If you see steam:
Carefully lift the hood after the steam subsides.
If you do not see steam:
Carefully lift the hood.
After the hybrid system has
cooled down sufficiently,
inspect the hoses and radiator
core (radiator) for any leaks.
Radiator
Cooling fans
If a large amount of coolant
leaks, immediately contact any
authorized Lexus dealer or
repairer, or another duly quali-
fied and equipped professional.
If your vehicle overheats
The following may indicate that your vehicle is overheating.
Correction procedures
1
2
3
1
2

595Alphabetical index
IS300h_EE(OM53B95E)
Clock .........................................420
Coat hooks .................................424
Condenser .................................446
Console box ...............................414
Coolant ......................................444
Capacity ................................567
Checking ...............................444
Preparing and checking
before winter ......................311
Cooling system ..........................444
Engine overheating ...............556
Hybrid system overheating ...556
Cruise control
Cruise control .......................245
Dynamic radar cruise control .....
249
Cup holders ...............................415
Current fuel consumption ..........117
Curtain shield airbags .................43
Customizable features ...............576DAB (Digital Audio Broadcast)339
Daytime running light system . 227
Defogger
Front windshield .................. 404
Outside rear view mirrors .... 404
Rear window ........................ 404
Differential ............................... 569
Digital Audio Broadcast (DAB)339
Dimensions ............................... 562
Display
Drive information ................ 117
Dynamic radar cruise control ....
249
LDA (Lane Departure Alert) 265
Multi-information display.... 116
Warning message................. 514
Distance .................................... 118
Do-it-yourself maintenance ...... 435
Door courtesy lights
Location ............................... 411
Wattage ................................ 572
Door lock
Doors ................................... 136
Smart entry & start system .. 149
Wireless remote control ....... 130D

597Alphabetical index
IS300h_EE(OM53B95E)
If you have a flat tire ....531, 545
If you think something
is wrong ..............................506
If your vehicle becomes stuck ....
560
If your vehicle has to be
stopped in an emergency ....499
If your vehicle needs to
be towed .............................500
If your vehicle overheats ......556
Emergency brake signal ............294
Emergency flashers ...................498
Emergency tire puncture
repair kit ..................................531
Energy monitor..........................122
Engine .......................................564
Accessory mode....................210
Compartment ........................439
Engine switch .......................209
Hood .....................................437
How to start the hybrid
system.................................209
Identification number ...........563
Ignition switch
(power switch)....................209
Overheating ..........................556
Power switch ........................209Engine coolant .......................... 444
Capacity ............................... 567
Checking .............................. 444
Preparing and checking
before winter ..................... 311
Engine coolant temperature
gauge ...................................... 110
Engine oil ................................. 440
Capacity ............................... 565
Checking .............................. 440
Preparing and checking
before winter ..................... 311
Engine switch ........................... 209
EPS (Electric Power Steering) . 293
Function ............................... 293
Warning light ....................... 508
EV drive mode.......................... 214
EV indicator ............................. 118

600Alphabetical index
IS300h_EE(OM53B95E)
Hooks
Cargo hooks ..........................417
Coat hooks ............................424
Retaining hooks (floor mat) ...34
Horn...........................................177
Hybrid battery (traction battery) .83
Hybrid battery (traction battery)
air vents .....................................84
Hybrid system .............................79
Emergency shut off system ....84
Energy monitor/
consumption screen ............122
EV drive mode......................214
High voltage components .......83
Hybrid System Indicator ......114
Hybrid system precautions .....83
Hybrid vehicle driving tips ...309
If the hybrid system
will not start .......................546
Overheating ..........................556
Power (ignition) switch ........209
Starting the hybrid system ....209
Hybrid System Indicator ...........114
Hybrid transmission ..................216
If the shift lever cannot be
shifted from P .....................548
Paddle shift switches ............218
S mode ..................................219Identification
Engine .................................. 563
Vehicle ................................. 563
Ignition switch (power switch) . 209
Illuminated entry system .......... 412
Immobilizer system .................... 90
Indicators .................................. 106
Initialization
Moon roof ............................ 189
Multi-information display.... 118
Power windows.................... 185
Tire pressure warning
system................................ 451
Inside door handle lights .......... 411
Inside rear view mirror ............. 178
Instrument panel light control .. 113
Interior lights ............................ 411
Wattage ................................ 572
Intrusion sensor and tilt sensor ... 99
ISOFIX rigid anchors ................. 70I