wheel Lexus GS200t 2017 Workshop Manual

375
4
4-5. Using the driving support systems
Driving
GS350_200t_GS F_OM_OM30F83E_(EE)
Driving assist systems
◆ABS (Anti-lock Brake System)
Helps to prevent wheel lock when the brakes 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
◆VSC+ (Vehicle Stability Control+)
Provides cooperative control of the ABS, TRC, VSC and EPS. Helps to main-
tain directional stability when swerving on slippery road surfaces by con-
trolling steering performance.
◆TRC (Traction Control)
Helps to maintain drive power and prevent the drive wheels from spinning
when starting the vehicle or accelerating on slippery roads
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.

3764-5. Using the driving support systems
GS350_200t_GS F_OM_OM30F83E_(EE)
◆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 superior a high level of stability, and helps good vehi-
cle posture
When SPORT S+ mode is selected by the driving mode select switch, the
damping force is suitable for sporty driving ( P. 359)
◆VDIM (Vehicle Dynamics Integrated Management)
Provides integrated control of the ABS, brake assist, TRC, VSC, hill-start
assist control and EPS systems
Helps to maintain vehicle stability when swerving on slippery road surfaces by
controlling the brakes, engine output, steering assist, and steering ratio
◆Emergency brake signal
When the brakes are applie d suddenly, the stop lights automatically flash to
alert the vehicle behind
The slip indicator light will flash while
the TRC/VSC systems are operating.
When the TRC/VSC sys tems are operating

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4-5. Using the driving support systems
4
Driving
GS350_200t_GS F_OM_OM30F83E_(EE)
If the vehicle gets stuck in mud, dirt or snow, the TRC system may reduce power
from the engine to the wheels. Pressing to turn the system off may make it
easier for rock the vehicle in order to free it.
To turn the TRC system off, quickly press and release . GS350/GS200t: The “Traction Control Turned Off” will be shown on the multi-infor-
mation display.
GS F: The “TRC OFF” indicator light will come on.
Press again to turn the system back on.
Disabling the TRC system
GS350/GS200tGS F

3824-5. Using the driving support systems
GS350_200t_GS F_OM_OM30F83E_(EE)
WARNING
■Expert mode precautions (GS F)
●Do not use on public roads.
●Use only when the road conditions and safety of the surrounding area can be
ensured.
●Proper use of expert mode re quires a professional level of driving skill. When using
expert mode, always check the road conditions and surrounding area and drive more
carefully than usual.
■Replacing tires
Make sure that all tires are of the specified size, brand, tread pattern and total load
capacity. In addition, make sure that the tires are inflated to the recommended tire infla-
tion pressure level.
The ABS, TRC and VSC systems will not function correctly if different tires are installed
on the vehicle.
Contact any authorized Lexus retailer or Lexus authorized repairer, or any reliable
repairer for further information when replacing tires or wheels.
■Handling of tires and the suspension
Using tires with any kind of problem or modi fying the suspension will affect the driving
assist systems, and may cause a system to malfunction.

3844-6. Driving tips
GS350_200t_GS F_OM_OM30F83E_(EE)
Perform the following according to the driving conditions: ●Do not try to forcibly open a window or move a wiper that is fr ozen. Pour
warm water over the frozen area to melt the ice. Wipe away the water imme-
diately to prevent it from freezing.
● To ensure proper operation of the climate control system fan, remove any
snow that has accumulated on the air inlet vents in front of the windsh ield.
● Check for and remove any excess ice or snow that may have accumulated on
the exterior lights, vehicle’s roof, chassis, around the tires or on the brakes.
● Remove any snow or mud from the bottom of your shoes before getting in the
vehicle.
Accelerate the vehicle slowly, keep a safe distance between you and the vehicle
ahead, and drive at a reduced speed suitable to road conditions. ● Park the vehicle and move the shift lever to P without setting the parking
brake. The parking brake may freeze up, preventing it from being released. If
the vehicle is parked without setting the parking brake, make sure to block the
wheels.
Failure to do so may be dangerous because it may cause the vehicle to move
unexpectedly, possibly leading to an accident.
● If the vehicle is parked without setting the parking brake, confirm that the shift
lever cannot be moved out of P *.
* : The shift lever will be locked if it is attemp ted to be shifted from P to any other position
without depressing the brake pedal. If the shift lever can be shifted from P, there may
be a problem with the shift lock system. Have the vehicle inspected by any authorized
Lexus retailer or Lexus authorized repair er, or any reliable repairer immediately.
Before driving the vehicle
When driving the vehicle
When parking the vehicle

387
4-6. Driving tips
4
Driving
GS350_200t_GS F_OM_OM30F83E_(EE)
WARNING
■Driving with snow tires
Observe the following precautions to reduce the risk of accidents.
Failure to do so may result in a loss of vehicle control and cause death or serious injury.
●Use tires of the specified size.
●Maintain the recommended level of air pressure.
●Do not drive at speeds in excess of the speed limit or the speed limit specified for the
snow tires being used.
●Use snow tires on all, not just some wheels.
■Driving with tire chains (GS350/GS200t with front and rear tires of the same size)
Observe the following precautions to reduce the risk of accidents.
Failure to do so may result in the vehicle being unable to be driven safely, and may
cause death or serious injury.
●Do not drive in excess of the speed limit spec ified for the tire chains being used, or 50
km/h (30 mph), whichever is lower.
●Avoid driving on bumpy road surfaces or over potholes.
●Avoid sudden acceleration, abrupt steerin g, sudden braking and shifting operations
that cause sudden engine braking.
●Slow down sufficiently before entering a curve to ensure that vehicle control is main-
tained.
●Do not use LKA (Lane-Keeping Assist) system. (if equipped)
●Do not use LDA (Lane Departure Alert with steering control) system. (if equipped)
NOTICE
■Repairing or replacing snow tires
Request repairs or replacement of snow ti res from Lexus dealers or legitimate tire
retailers.
This is because the removal and attachment of snow tires affects the operation of the
tire pressure warning va lves and transmitters.
■Fitting tire chains (GS350/GS200t with front and rear tires of the same size)
The tire pressure warning valves and transmitters may not function correctly when tire
chains are fitted.
■When standing the windshield wipers up
Raise the wipers in line with the windshield. ( P. 386)
Failure to do so may result in damage to the wipers and/or the hood.

389
5Interior features
GS350_200t_GS F_OM_OM30F83E_(EE)
5-1. Remote Touch screenRemote Touch/12.3-inch display ......................................... 390
5-2. Using the air conditioning system and defogger
Front automatic air conditioning system .........396
Rear air conditioning system ........ 408
Heated steering wheel/ seat heaters/
seat ventilators ............................ 411
5-3. Using the interior lights Interior lights list........................... 416

411
5
5-2. Using the air conditioning system and defogger
Interior features
GS350_200t_GS F_OM_OM30F83E_(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:

4125-2. Using the air conditio ning system and defogger
GS350_200t_GS F_OM_OM30F83E_(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 engine switch is in IGNITION 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
1
2
3
4

4385-5. Using the other interior features
GS350_200t_GS F_OM_OM30F83E_(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 from
behind, etc.)
●The airbag may not inflate even in case of an accident, if it does not involve high
impact. In such cases, the system may not make emergency calls automatically. The
system 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.