steering wheel LEXUS GS300H 2019 Service Manual

2954-5. Using the driving support systems
4
Driving
GS450h_300h_OM_OM30F92E_(EE)
●Side road speed signs may be detected and displayed (if positioned in sight of the cam-era sensor) while the vehicle is traveling on the main road.
●Roundabout exit road speed signs may be detected and displayed (if positioned in sight
of the camera sensor) while traveling on a roundabout.
●On some models: The speed information displayed on the meter and that displayed on the navigation system may be different due to the navigation system using map data.
■When driving vehicle in country with different speed unit
Since RSA recognizes signs based on the set unit of the meter, it is necessary to changethe set unit of the meter. Adjust the set unit of the meter to the speed unit of signs in the
current location. (P. 565)
■Turning the system on/off
■Speed limit sign display
If the power switch was last turned off while a speed limit sign was displayed on the multi-
information display, the same sign displays again when the power switch is turned to ON mode.
■Customization
Setting (e.g. speeding warning threshold) can be changed. (Customizable feature: P. 561)
Select on of the
multi-information display (P. 111)
Press on the steering wheel.
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3074-5. Using the driving support systems
4
Driving
GS450h_300h_OM_OM30F92E_(EE)
■Conditions under which the vehicle-to-vehicle distance control mode may not function correctly
In the case of the following conditions, operate the brake pedal (or accelerator pedal,
depending on the situation) as necessary. As the sensor may not be able to correctly detect vehicles ahead, the system may notoperate properly.
●When the vehicle ahead of you decelerates suddenly
●When your vehicle is pointing upwards(caused by a heavy load in the luggage com-partment, etc.)
●Preceding vehicle has an extremely highground clearance
●When the road curves or when the lanes arenarrow
●When steering wheel operation or your posi-tion in the lane is unstable

3244-5. Using the driving support systems
GS450h_300h_OM_OM30F92E_(EE)
Driving assist systems
◆ECB (Electronically Controlled Brake System)
The electronically controlled system generates braking force corresponding
to the brake operation
◆ABS (Anti-lock Brake System)
Helps to prevent wheel lock when the br akes are applied suddenly, or if the
brakes are applied while driving on a slippery road surface
◆Brake assist
Generates an increased level of braking force after the brake pedal is
depressed when the system detects a panic stop situation
◆VSC (Vehicle Stability Control)
Helps the driver to control skidding when swerving suddenly or turning on
slippery road surfaces
◆TRC (Traction Control)
Helps to maintain drive power and prevent the drive wheels from spinning
when starting the vehicle or accelerating on slippery roads
◆VGRS (Variable Gear Ratio Steering) (if equipped)
Adjusts the front wheel turning angle in accordance with the vehicle speed
and steering wheel movement
To help enhance driving safety and performance, the following systems oper-
ate automatically in response to various driving situations. Be aware, however,
that these systems are suppl ementary and should not be relied upon too heav-
ily when operating the vehicle.

3254-5. Using the driving support systems
4
Driving
GS450h_300h_OM_OM30F92E_(EE)
◆DRS (Dynamic Rear Steering) (if equipped)
Contributes to the turning characteristics and responsiveness of the vehicle
by slightly adjusting the rear wheel angle of the vehicle in accordance with
steering wheel movement
◆Hill-start assist control
Helps to prevent the vehicle from rolling backward when starting on an
incline.
◆EPS (Electric Power Steering)
Employs an electric motor to reduce the amount of effort needed to turn the
steering wheel
◆AVS (Adaptive Variable Susp ension system) (if equipped)
By independently controlling the damp ing force of the shock absorbers for
each of the 4 wheels according to the road and driving conditions, this system
helps riding comfort with a high level of stability, and helps good vehicle pos-
ture
When SPORT S+ mode is selected by the driving mode select switch, the
damping force is suitable for sporty driving ( P. 312)
◆LDH (Lexus Dynamic Handling system) (if equipped)
Provides independent control of the VGRS, DRS and EPS. Contributes to
turning characteristics at low speeds, responsiveness at medium speeds and
safety at high speeds by controlling the steering angle of the front and rear
wheels in accordance with the steering wheel operation and vehicle speed
◆VDIM (Vehicle Dynamics Integrated Management)
Provides integrated control of the ABS, brake assist, TRC, VSC, hill-start
assist control, EPS, VGRS (if equipped) and DRS (if equipped) systems
Helps to maintain vehicle stability when swerving on slippery road surfaces by
controlling the brakes, hybrid system output, steering assist, steering ratio and
rear wheel angle
◆Emergency brake signal
When the brakes are applie d suddenly, the stop lights automatically flash to
alert the vehicle behind

3274-5. Using the driving support systems
4
Driving
GS450h_300h_OM_OM30F92E_(EE)
■Turning off both TRC and VSC systems
To turn the TRC and VSC systems off, press and hold for more than 3 seconds while the vehicle is stopped.
The VSC OFF indicator light will come on an d the “Traction Control Turned Off” will
be shown on the multi-information display.*
Press again to turn the systems back on.
*: On vehicles with PCS (Pre-Crash Safety system), pre-crash brake assist and pre-
crash braking will also be disabled. The PCS (Pre-Crash Safety system) warning
light will come on and a message will be di splayed on the multi-information display.
( P. 466)
■When the message is displayed on the multi-information display showing that TRC has
been disabled even if has not been pressed
TRC and hill-start assist control cannot be operated. Contact any authorized Lexus
retailer or Lexus authorized repa irer, or any reliable repairer.
■VGRS is disabled when
VGRS may stop operating in the following situations.
In this event, the steering wheel may move fr om its straight forward position, but it will return when the system restarts.
●The steering wheel is operated for an extended period of time while the vehicle is
stopped or is moving very slowly.
●When force is continuously applied for a long time with the steering wheel turned as far as it will go.
The center position of the steering wheel may change when VGRS is disabled. How- ever, the position will return to normal after VGRS is reactivated.
■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.

3284-5. Using the driving support systems
GS450h_300h_OM_OM30F92E_(EE)
■Sounds and vibrations caused by the ABS, brake assist, VSC, Hill-start assist control, TRC and VGRS systems
Any of the following conditions may occur when the above systems are operating. 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.
■ECB operation sound
ECB operating sound may be heard in the follow ing cases, but it does not indicate that a malfunction has occurred.
●Operating sound heard from the engine compartment when the brake pedal is oper-ated.
●Motor sounds of the brake system heard from the front part of the vehicle when the
driver’s door is opened.
●Operating sound heard from the engine compartment when one or two minutes passed after the stop of the hybrid system.
■EPS, VGRS and DRS operation sound
When the steering wheel is operated, a motor sound (whirring sound) may be heard. This does not indicate a malfunction.
■Automatic reactivation of TRC and VSC systems
After turning the TRC and VSC systems off, the systems will be automatically re-enabled in the following situations:
●When the power switch is turned off
●If only the TRC system is turned off, the TR C will turn on when vehicle speed increases If both TRC and VSC systems are turned off, automatic re-enabling will not occur when
vehicle speed increases.
■Reduced effectiveness of the EPS system
The effectiveness of the EPS system is reduced to prevent the system from overheating when there is frequent steering input over an extended period of time. The steeringwheel 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 nor- mal within 10 minutes.
■Operating conditions of hill-start assist control
When the following four conditions are met, the hill-start assist control will operate;
●The shift lever is in a position other than N or P (when starting off forward/backward on an upward incline).
●The vehicle is stopped.
●The accelerator pedal is not depressed.
●The parking brake is not engaged.

339
5Interior features
GS450h_300h_OM_OM30F92E_(EE)
5-1. Remote Touch screen
Remote Touch/12.3-inch
display ......................................... 340
5-2. Using the air conditioning
system and defogger
Front automatic
air conditioning system ......... 346
Rear air conditioning
system ......................................... 358
Heated steering wheel/
seat heaters/
seat ventilators .......................... 361
5-3. Using the interior lights
Interior lights list..........................366
• Interior lights .......................... 367
• Personal lights ....................... 367
5-4. Using the storage features
List of storage features ............ 369
• Glove box ............................... 370
• Console box .......................... 370
• Cup holders .............................371
• Auxiliary boxes ..................... 373
Trunk features ............................. 374
5-5. Using the other interior
features
Other interior features ............ 377
• Sun visors ................................ 377
• Vanity mirrors .........................377
• Clock ........................................ 378
• Ashtrays................................... 378
• Power outlets......................... 379
• Armrest................................... 380
• Rear sunshade/
rear door sunshades.......... 380
• Coat hooks .............................382
• Assist grips .............................383
ERA-GLONASS ......................384

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5
5-2. Using the air conditioning system and defogger
Interior features
GS450h_300h_OM_OM30F92E_(EE)
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 vent ilators maintain good airflow by blow-
ing air from the seats.
WARNING
●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
●To prevent damage to the seat heaters/seat ventilators, do not put heavy objects thathave 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 systemis off.

3625-2. Using the air conditioning system and defogger
GS450h_300h_OM_OM30F92E_(EE)
Turns the heated steering wheel on/off
The indicator light comes on when the heater is operating.
●The heated steering wheel can be used when the power switch is in ON mode.
●The heated steering wheel will automatically turn off after about 30 minutes.
■Front seat heaters and ventilators (if equipped)/rear seat heaters (if
equipped)
Seat heater switches
The indicator light (yellow) on the switch comes on when the seat heater is operat- ing.
Seat ventilator switches (front seats only)
The indicator light (green) on the switch co mes on when the seat ventilator is oper-
ating.
Level indicator lights
The seat heater temperature level or the seat ventilator fan speed level (for front
seats only) is displayed.
“AUTO” indicator lights
Heated steering wheel (if equipped)
Seat heaters/seat ventilators
Front seatsRear seats
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3875-5. Using the other interior features
5
Interior features
GS450h_300h_OM_OM30F92E_(EE)
WARNING
■For your safety
●Please drive safely. The function of this system is to assist you in making the Emergency Call in case of
accidents as traffic accidents or sudden medi cal emergencies, and it does not protect the driver or the passengers in any way. Plea se drive safely and fasten your seatbelts at all times for your safety.
●In case of an emergency, make lives the top priority.
●If you smell anything burning or another unus ual smell, do not stay inside the vehicle and evacuate to a safe area immediately.
●Since the system detects shocks, the automatic reporting may not always occur syn-chronized with the operation of the airbag system. (If the vehicle is bumped frombehind, etc.)
●The airbag may not inflate even in case of an accident, if it does not involve highimpact. In such cases, the system may not make emergency calls automatically. Thesystem may also not make automatic emergency calls even if the airbag has been
inflated. If any of these should occur, plea se report to the Public Safety Answering Point (PSAP) by operating the “SOS” button.
●For safety, do not make the Emergency Call while driving.
Making calls during driving may cause mish andling of the steering wheel, which may lead to unexpected accidents.Stop the vehicle and confirm the safety of the area before making the Emergency
Call.
●When changing fuses, please use fuses that correspond to the described standard. If you use fuses other than those described, it may cause ignition or smoke in the cir-
cuit and may lead to a fire.
●Using the system while there is smoke or an unusual smell may cause a fire. Stop using the system immediately and consult any authorized Lexus retailer or Lexus
authorized repairer, or any reliable repairer.
NOTICE
■To prevent damage
Do not pour any liquid on to the “SOS” button panel etc. and make any impact to it.
■If the “SOS” button panel malfunctions
It may not be able to make the Emergency Call or inform you of the correct condition
of the system. If the “SOS” button panel has been broken, please consult any autho- rized Lexus retailer or Lexus authorized repairer, or any reliable repairer.
■If there is any malfunction of the speaker or the microphone during the Emergency
Call or the Manual Maintenance Check
You will not be able to communicate with the Public Safety Answering Point (PSAP) operator.
If any of this equipment has been broken, please consult any authorized Lexus retailer or Lexus authorized repairer, or any reliable repairer.