2018 Lexus GS450h stop start

GS450h_OM_OM30G62U_(U)
2734-5. Using the driving support systems
4
Driving
WARNING
■The ABS does not operate effectively when
●The limits of tire gripping performance have been exceeded. (such as excessively
worn tires on a snow covered road).
●The vehicle hydroplanes while driving at high speed on wet or slick roads.
■Stopping distance when the ABS is operating may exceed that of normal conditions
The ABS is not designed to shorten the vehi cle’s stopping distance. Always maintain a
safe distance from the vehicle in front of you, especially in the following situations:
●When driving on dirt, grav el or snow-covered roads
●When driving with tire chains
●When driving over bumps in the road
●When driving over roads with potholes or uneven surfaces
■TRAC may not operate effectively when
Directional control and power may not be achievable wh ile driving on slippery road
surfaces, even if the TRAC system is operating.
Drive the vehicle carefully in conditions where stability and power may be lost.
■Hill-start assist control does not operate effectively when
●Do not overly rely on the hill-start assist control. The hill-start assist control may not
operate effectively on steep inclines and roads covered with ice.
●Unlike the parking brake, hill-start assist co ntrol is not intended to hold the vehicle
stationary for an exte nded period of time. Do not atte mpt to use hill-start assist con-
trol to hold the vehicle on an incline, as doing so may lead to an accident.
■When the VSC is activated
The slip indicator light flashes. Always drive carefully. Reckless driving may cause an
accident. Exercise particular care when the indicator light flashes.
■When the TRAC/VSC systems are turned off
Be especially careful and drive at a speed appropriate to the road conditions. As these
are the systems to help ensure vehicle stab ility and driving force, do not turn the
TRAC/VSC systems off unless necessary.
■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 tire s are inflated to the recommended tire infla-
tion pressure level.
The ABS, TRAC and VSC systems will not function correctly if different tires are
installed on the vehicle.
Contact your Lexus dealer for further in formation 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.

GS450h_OM_OM30G62U_(U)
2754-6. Driving tips
4
Driving
◆Delays
Repeated acceleration and deceleration, as well as long waits at traffic lights,
will lead to bad fuel economy. Check traffic reports before leaving and avoid
delays as much as possible. When drivin g in a traffic jam, gently release the
brake pedal to allow the vehicle to move forward slightly while avoiding over-
use of the accelerator pedal. Doing so can help control excessive gasoline
consumption.
◆Highway driving
Control and maintain the vehicle at a co nstant speed. Before stopping at a toll
booth or similar, allow plenty of ti me to release the accelerator and gently
apply the brakes. A greater amount of electrical energy can be regenerated
when slowing down.
◆Air conditioning
Use the air conditioning only when necessary. Doing so can help reduce
excessive gasoline consumption.
In summer: When the ambient temperature is high, use the recirculated air
mode. Doing so will help to reduce the burden on the air conditioning system
and reduce fuel consumption as well.
In winter: Because the gasoline engine will not automatically cut out until it
and the interior of the vehicle are warm , it will consume fuel. Also, fuel con-
sumption can be improved by av oiding overuse of the heater.
◆Checking tire inflation pressure
Make sure to check the tire inflation pr essure frequently. Improper tire infla-
tion pressure can cause poor fuel economy.
Also, as snow tires can cause large amou nts of friction, their use on dry roads
can lead to poor fuel economy. Use tires that are appropriate for the season.
◆Luggage
Carrying heavy luggage will lead to poor fuel economy. Avoid carrying
unnecessary luggage. Installing a large roof rack will also cause poor fuel
economy.
◆Warming up before driving
Since the gasoline engine starts up an d cuts out automatically when cold,
warming up the engine is unnecessary. Moreover, frequently driving short dis-
tances will cause the engine to repeated ly warm up, which can lead to excess
fuel consumption.

GS450h_OM_OM30G62U_(U)
2955-2. Using the air conditioning system and defogger
5
Interior features
■Adjusting the position of and opening and closing the air outlets
Direct air flow to the left or right, up or down.
Turn the knob to open or close the vent.
■Registering air conditioning settings to electronic keys
●Unlocking the vehicle using an electronic key and turning the power switch to ON
mode will recall that ke y’s registered air conditioning settings.
●When the power switch is turned off, the cu rrent air conditioning settings will automati-
cally be registered to the electronic key that was used to unlock the vehicle.
●The system may not operate correctly if more th an one electronic key is in the vicinity or
if the smart access system with push-button start is used to unlock a passenger door.
●Settings for the electronic key and the corresponding door can be changed. Contact
your Lexus dealer.
■Using automatic mode
Fan speed is adjusted automatically accordin g to the temperature setting and the ambi-
ent conditions.
Therefore, the fan may stop for a while until warm or cool air is ready to flow immediately
after is pressed.
Cool air may blow around the upper body even when the heater is on due to sunlight.
■Fogging up of the windows
●The windows will easily fog up when the humidi ty in the vehicle is high. Turning “A/C” on
will dehumidify the air from the outlets and defog the windshield 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/recircu-
lated air mode button to the recirculated air mode. This is effective in preventing out-
side air from enteri ng the vehicle interior. During cooling operation, setting the
recirculated air mode will also cool the vehicle interior effectively.
●Outside/recirculated air mode may automa tically switch depending on the tempera-
ture setting or the inside temperature.
Front center outlets and front side
outletsRear seat outlets
1
2

GS450h_OM_OM30G62U_(U)
3255-5. Using the other interior features
5
Interior features
■Enabling 2-way communication with a garage door (only available for com-
patible devices)
When enabled, 2-way communication allows you to check the status of the
opening and closing of a garage door through indicators in your vehicle.
2-way communication is only available if the garage door opener motor used
is a compatible device. (To check devi ce compatibility, refer to www.Home-
Link.com.)
Within 5 seconds after programming the garage door opener has been
completed, if the garage door op ener motor is trained to HomeLink
®,
both garage door operation indicator s will flash rapidly (green) and the
light on the garage door opener moto r will blink twice, indicating that 2-
way communication is enabled.
If the indicators do not flash, perform and within the first 10 presses of
the HomeLink
® button after programming has been completed.
Press a programmed HomeLink
® button to operate a garage door.
Within 1 minute of pressing the HomeLink
® button, after the garage door
operation has stopped, press the “Learn” or “Smart” button on the garage
door opener motor. Within 5 seconds of the establishment of 2-way com-
munication with the garage door opener, both garage door operation indi-
cators in the vehicle will flash rapidly (green) and the light on the garage
door opener motor will blink twice, indicating that 2-way communication is
enabled.
■Reprogramming a single HomeLink® button
When the following procedure is performed, buttons which already have
devices registered to them can be overwritten: With one hand, press and hold the desired HomeLink
® button.
When the HomeLink
® indicator starts flashing (orange), continue to hold
the HomeLink® button and perform “Programming HomeLink®” (it
takes 20 seconds for the HomeLink® indicator to start flashing).
Press the appropriate HomeLink
® button. The HomeLink® indicator light
should turn on.
Operating HomeLink®
1
23
2
3
1
2
1

395
GS450h_OM_OM30G62U_(U)
7When trouble arises
7-1. Essential information Emergency flashers .................. 396
If your vehicle has to be stopped in an emergency.... 397
7-2. Steps to take in an emergency If your vehicle needs to be towed................................398
If you think something is wrong ................403
If a warning light turns on or a warning buzzer sounds.....404
If a warning message is displayed ................................. 410
If you have a flat tire ....................441
If the hybrid system will not start................................450
If the parking brake cannot be released ................................ 452
If the electronic key does not operate properly ..................... 454
If the 12-volt battery is discharged ............................. 457
If your vehicle overheats .......... 461
If the vehicle becomes stuck ............................................. 466

4097-2. Steps to take in an emergency
GS450h_OM_OM30G62U_(U)
7
When trouble arises
WARNING
■Maintenance of the tires
Each tire, including the spare (if provided), should be checked monthly when cold and
inflated to the inflation pressure recomm ended by the vehicle manufacturer on the
vehicle placard or tire inflation pressure label (tire and load information label). (If your
vehicle has tires of a different size than the size indicated on the vehicle placard or tire
inflation pressure label [tire and load in formation label], you should determine the
proper tire inflation pressure for those tires.)
As an added safety feature, your vehicle ha s been equipped with a tire pressure moni-
toring system (TPMS-tire pressure warning system) that illuminates a low tire pressure
telltale (tire pressure warning light) when on e or more of your tires is significantly
under-inflated. Accordingly, when the low ti re pressure telltale (tire pressure warning
light) illuminates, you should stop and check your tires as soon as possible, and inflate
them to the proper pressure. Driving on a si gnificantly under-inflated tire causes the
tire to overheat and can lead to tire failure . Under-inflation also reduces fuel efficiency
and tire tread life, and may affect the vehicle’s handling and stopping ability.
Please note that the TPMS (tire pressure wa rning system) is not a substitute for proper
tire maintenance, and it is th e driver’s responsibility to ma intain correct tire pressure,
even if under-inflation has not reached the le vel to trigger illumination of the TPMS low
tire pressure telltale (tir e pressure warning light).
Your vehicle has also been equipped with a TPMS (tire pressure warning system) mal-
function indicator to indicate when the system is not operating properly. The TPMS
(tire pressure warning system) malfunction indi cator is combined with the low tire pres-
sure telltale (tire pressure warning light). When the system detects a malfunction, the
telltale will flash for approximately one mi nute and then remain continuously illumi-
nated. This sequence will cont inue upon subsequent vehicle start-ups as long as the
malfunction exists. When the malfunction in dicator is illuminated, the system may not
be able to detect or signal low tire pressure as intended.
TPMS (tire pressure warning system) malfun ctions may occur for a variety of reasons,
including the installation of replacement or alternate tires or wheels on the vehicle that
prevent the TPMS (tire pressure warning system) from functioning properly. Always
check the TPMS (tire pressure warning system) malfunction telltale after replacing one
or more tires or wheels on your vehicle to ensure that the replacement or alternate
tires and wheels allow the TPMS (tire pressu re warning system) to continue to function
properly.
NOTICE
■To ensure the tire pressure warning system operates properly
Do not install tires with differ ent specifications or markers, as the tire pressure warning
system may not operate properly.

4157-2. Steps to take in an emergency
GS450h_OM_OM30G62U_(U)
7
When trouble arises
Indicates that the hybrid battery (traction battery) power
has dropped because a long period of time has elapsed
after shifting the shift lever to NA buzzer also sounds.
→ Restart the hybrid system when starting the vehicle.
Indicates a malfunction in the hybrid system
Depending on the malfunction, troubleshooting meth-
ods may also be displayed.
A buzzer also sounds.
→ Immediately stop the vehicle in a safe place and
contact your Lexus dealer.
Indicates that the traction battery is low
A buzzer also sounds.
→ When stopping the vehicle for a long period of time,
shift the shift lever to P. The battery cannot be
charged with the shift lever in N.
Indicates a malfunction in th e EPS (Electric Power Steer-
ing) system A buzzer also sounds.
→ Have the vehicle inspected by your Lexus dealer.
Warning messageDetails/Actions
(Flashes)
(Flashes)

4307-2. Steps to take in an emergency
GS450h_OM_OM30G62U_(U)
Indicates that the tire position information cannot be rec-
ognized
→Drive for a short while an d check if the display
updates.
If the radio wave conditions improve, the display
may return to normal. If th e tire pressure is still not
displayed after driving for several minutes, stop the
vehicle in a safe place, turn the power switch off
then on again, and start driv ing. If the tire pressure is
still not displayed even after repeating this process
several times, have the vehicle inspected at your
Lexus dealer.
Indicates that the washer fluid level is low
→ Add washer fluid.
Except F SPORT models: Indicates that remaining fuel is
approximately 2.6 gal. (10.0 L, 2.2 Imp.gal.) or less
F SPORT models: Indicates remaining fuel is approxi-
mately 2.6 gal. (9.9 L, 2.2 Imp.gal.) or less
→ Refuel the vehicle.
Indicates that the outside temperature is approximately
37° F (3 °C) or lower
A buzzer also sounds.
→ Drive carefully, as the road may be icy.
Indicates that the power oil is scheduled to be changed
→Check the engine oil and change if necessary. After
changing the engine oil, the oil change system
should be reset. ( →P. 355)
(The indicator will not work properly unless the oil
maintenance data has been reset.)
Warning messageDetails/Actions