service LEXUS GS300H 2019 Owners Manual

5
1
8
7
6
5
4
3
2
GS450h_300h_OM_OM30F92E_(EE)
6-3. Do-it-yourself maintenance
Do-it-yourself service
precautions ................................399
Hood ................................................ 401
Positioning a floor jack.............402
Engine compartment............... 403
12-volt battery............................... 412
Tires .................................................. 416
Tire inflation pressure...............429
Wheels............................................. 431
Air conditioning filter................433
Electronic key battery ..............435
Checking and replacing
fuses .............................................. 437
Light bulbs ..................................... 442
7-1. Essential information
Emergency flashers...................452
If your vehicle has to be
stopped in an
emergency.................................453
7-2. Steps to take in an
emergency
If your vehicle needs
to be towed ................................454
If you think something
is wrong .......................................459
If a warning light turns on
or a warning buzzer
sounds..........................................460
If a warning message
is displayed................................. 466
If you have a flat tire
(vehicles with spare tire) ..... 498
If you have a flat tire
(vehicles without spare
tire) ............................................... 509
If the hybrid system
will not start................................523
If the parking brake
cannot be released.................525
If the electronic key does
not operate properly ............. 527
If the 12-volt battery is
discharged ................................ 530
If your vehicle overheats .........535
If the vehicle becomes
stuck.............................................. 542
7When trouble arises

9
GS450h_300h_OM_OM30F92E_(EE)
The installation of an RF-transmitter system in your vehicle could affect electronic sys- tems such as:
●Multiport fuel injection system/seque ntial multiport fuel injection system
●Dynamic radar cruise control with full-speed range system
●Cruise control system
●Anti-lock brake system
●Vehicle dynamics integrated management
●SRS airbag system
●Seat belt pretensioner system
Be sure to check with any authorized Lexus re tailer or Lexus authorized repairer, or any reliable repairer for precautionary measures or special instructions regarding installation of an RF-transmitter system.
Further information regarding frequency ba nds, power levels, antenna positions and installation provisions for the installation of RF-transmitters, is available on request at any authorized Lexus retailer or Lexus author ized repairer, or any reliable repairer.
High voltage parts and cables on the hybrid vehicles emit approximately the same amount of electromagnetic waves as the conventional gasoline powered vehicles orhome electronic appliances despite of their electromagnetic shielding.
Unwanted noise may occur in the reception of the radio frequency transmitter (RF-trans- mitter).
The SRS airbag and seat belt pretensioner devices in your Lexus contain explosive
chemicals. If the vehicle is scrapped with th e airbags and seat belt pretensioners left as they are, this may cause an accident such as fire. Be sure to have the systems of the SRSairbag and seat belt pretensioner removed and disposed of by a qualified service shop or
by any authorized Lexus retailer or Lexus au thorized repairer, or any reliable repairer before you scrap your vehicle.
Installation of an RF-transmitter system
Scrapping of your Lexus
Your vehicle contains batteries and/or accumulators. Do not discard them into the
environment but cooperate with separate collection (Directive 2006/66/EC).

491-1. For safe use
1
For safety and security
GS450h_300h_OM_OM30F92E_(EE)
■If the SRS airbags deploy (inflate)
●Slight abrasions, burns, bruising etc., may be sustained from SRS airbags, due to the extremely high speed deployment (inflation) by hot gases.
●A loud noise and white powder will be emitted.
●Parts of the airbag module (steering wheel hub, airbag cover and inflator) as well as theseats, the glove box, parts of the front and re ar pillars, and roof side rails may be hot for several minutes. The airbag itself may also be hot.
●The windshield may crack.
●Vehicles with ERA-GLONASS: If the SRS ai rbags deploy, the system is designed to send an emergency call* to the Public Safety Answer ing Point (PSAP), notifying them
of the vehicle’s location (without needing to push the “SOS” button) and an agent will attempt to speak with the occupants to ascertain the level of emergency and assistancerequired. If the occupants are unable to communicate, the agent automatically treats
the call as an emergency and helps to di spatch the necessary emergency services. ( P. 384)
*: In some cases, the call cannot be made. (P. 386)
■SRS airbag deployment conditions (SRS front airbags)
●The SRS front airbags will deploy in the event of an impact that exceeds the set thresh- old level (the level of force corresponding to an approximately 20 - 30 km/h [12 - 18mph] frontal collision with a fixed wall that does not move or deform).
However, this threshold velocity will be cons iderably higher in the following situations:
• If the vehicle strikes an object, such as a parked vehicle or sign pole, which can move or deform on impact
• If the vehicle is involved in an underride collision, such as a collision in which the front of the vehicle “underrides”, or goes under, the bed of a truck
●Depending on the type of collision, it is possib le that only the seat belt pretensioners will activate.
■SRS airbag deployment conditions (SRS side and curtain shield airbags)
●The SRS side and curtain shield airbags w ill deploy in the event of an impact that exceeds the set threshold level (the level of force corresponding to the impact forceproduced by an approximately 1500 kg [3300 lb.] vehicle colliding with the vehicle
cabin from a direction perpendicular to the vehicle orientation at an approximate speed of 20 - 30 km/h [12 - 18 mph]).
●The SRS side and curtain shield airbags may also deploy in the event of a severe frontal
collision.

801-2. Hybrid system
GS450h_300h_OM_OM30F92E_(EE)
Hybrid system precautions
The illustration is an exam ple for explanation and may differ from the actual item.
Take care when handling the hybrid system, as it is a high voltage system
(about 650 V at maximum) as well as contains parts that become extremely
hot when the hybrid system is operatin g. Obey the warning labels attached to
the vehicle.
Warning label
Power control unit
Electric motor (traction motor)
Hybrid battery (traction battery)
Service plug
High voltage cables (orange)
Air conditioning compressor
1
2
3
4
5
6
7

821-2. Hybrid system
GS450h_300h_OM_OM30F92E_(EE)
■If a warning light comes on, a warning message is displayed, or the 12-volt battery is dis-
connected
The hybrid system may not start. In this case, try to start the system again. If the “READY” indicator does not come on, contact any authorized Lexus retailer or Lexus authorized
repairer, or any reliable repairer.
■Running out of fuel
When the vehicle has run out of fuel and the hybrid system cannot be started, refuel the
vehicle with at least enough gasoline to make the low fuel level warning light ( P. 462) go off. If there is only a small amount of fuel, the hybrid system may not be able to start.(The standard amount of fuel is about 9.9 L [2 .6 gal., 2.2 Imp.gal.], when the vehicle is on
a level surface. This value may vary when the vehicle is on a slope. Add extra fuel when the vehicle is inclined.)
■Electromagnetic waves
●High voltage parts and cables on hybrid ve hicles incorporate electromagnetic shield- ing, and therefore emit approximately the same amount of electromagnetic waves asconventional gasoline powered vehicles or home electronic appliances.
●Your vehicle may cause sound interference in some third party-produced radio parts.
■Hybrid battery (traction battery)
The hybrid battery (traction battery) has a lim ited service life. The lifespan of the hybrid
battery (traction battery) can change in accordance with driving style and driving condi- tions.
■Declaration of conformity
This model conforms to hydrogen emissions according to regulation ECE100 (Battery electric vehicle safety).
WARNING
■High voltage precautions
This vehicle has high voltage DC and AC systems as well as a 12-volt system. DC and
AC high voltage is very dangerous and can cause severe burns and electric shock that may result in death or serious injury.
●Never touch, disassemble, remove or replace the high voltage parts, cables or their
connectors.
●The hybrid system will become hot after starting as the system uses high voltage. Be careful of both the high voltage and the hi gh temperature, and always obey the warn-
ing labels attached to the vehicle.
●Never try to open the service plug access
hole located behind the rear seats. The ser- vice plug is used only when the vehicle is ser-viced and is subject to high voltage.

3344-6. Driving tips
GS450h_300h_OM_OM30F92E_(EE)
Winter driving tips
●Use fluids that are appropriate to the prevailing outside temperatures.
•Engine oil
• Engine/power control unit coolant
•Washer fluid
●Have a service technician inspect the condition of the 12-volt battery.
●Have the vehicle fitted with four snow tires or purchase a set of tire chains for
the rear tires.*
Ensure that all tires are the specified size and brand, and that chains match the size of the tires.
*: Tire chains cannot be mounted on vehicles with front and rear tires of differing
sizes and vehicles with LDH and 19 inch tires
Perform the following according to the driving conditions:
●Do not try to forcibly open a window or move a wiper that is frozen. 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 windshield.
●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.
Carry out the necessary preparations an d inspections before driving the vehi-
cle in winter. Always drive the vehicle in a manner appropriate to the prevail-
ing weather conditions.
Preparation for winter
Before driving the vehicle

3845-5. Using the other interior features
GS450h_300h_OM_OM30F92E_(EE)
ERA-GLONASS
“SOS” button
Indicator lights
Microphone
■Automatic Collision Notification
If any airbag deploys, the system is designed to automatically call the Public
Safety Answering Point (PSAP)*. The responding agent receives the vehicle’s
location and attempts to speak with the vehicle occupants to assess the level
of emergency. If the occupants are unable to communicate, the agent auto-
matically treats the call as an emer gency, contacts the nearest emergency
services provider to describe the situation, and requests that assistance be
sent to the location.
*: In some cases, the call cannot be made. ( P. 386)
: If equipped
ERA-GLONASS is a telematics service that uses Global Navigation Satellite
System (GLONASS) data and embedded cellular technology to enable the
following emergency calls to be ma de: Automatic emergency calls (Auto-
matic Collision Notification) and manu al emergency calls (by pressing the
“SOS” button). This service is require d by Eurasian Customs Union Regula-
tions.
System components
1
2
3
Emergency Notification Services

3855-5. Using the other interior features
5
Interior features
GS450h_300h_OM_OM30F92E_(EE)
■Emergency Assistance Button (“SOS”)
In the event of an emergency, push the “SOS” button to reach the Public
Safety Answering Point (PSAP). The answering agent will determine your
vehicle’s location, assess the emergency, and dispatch the necessary assis-
tance required.
If you accidentally press the “SOS” button, tell the agent that you are not experi-
encing an emergency.
When the power switch is turned to ON mode, the red indicator light will illumi-
nate for 10 seconds and then the green indicator light will illuminate for 2 sec-
onds, indicating that the system is enab led. The indicator lights indicate the
following:
●If the green indicator light illuminates and stays on, the system is enabled.
●If the green indicator light flashes, an emergency call is being made (either
automatically or manually).
●If no indicator lights illuminate, the system is not enabled.
●If the red indicator light illuminates any time other than immediately after the
power switch is turned to ON mode, the system may be malfunctioning or the
backup battery may be depleted. Contact any authorized Lexus retailer or
Lexus authorized repairer, or any reliable repairer.
The service life of the backup battery is 3 years or more.
Indicator lights

3865-5. Using the other interior features
GS450h_300h_OM_OM30F92E_(EE)
WARNING
■When the Emergency Call may not be made
●Any of the followings may occur. In such cases, report to the Public Safety Answering Point (PSAP) by other means such as nearby public phones.
• It may sometimes be difficult to connect to the Public Safety Answering Point (PSAP) even in the reception area of the cellular phone due to the reception level,or if the line is busy.
In such cases, you may not be able to connect to the Public Safety Answering Point (PSAP) and thus will not be able to make emergency calls and report to the emer- gency departments even though the system tries to connect to the Public Safety
Answering Point (PSAP). • When the vehicle is out of the cellular phone service area, the Emergency Callcannot be made.
• When any related equipment (such as th e “SOS” button panel, indicator lights, microphone, speaker, DCM, antenna, or any wires connecting the equipment.)has an abnormality, is damaged or brok en, the Emergency Call cannot be made.
• During the Emergency Call, the system makes repeated attempts to connect to the Public Safety Answering Point (PSAP). However, if it cannot connect to thePublic Safety Answering Point (PSAP) due to poor radio wave reception, the sys-
tem may not be able to connect to the cellular network and the call may finish with- out connecting. The red indicator light w ill blink for approximately 30 seconds to indicate this disconnection.
• This device may not function if a shock is applied to it.
●If the 12-volt battery’s voltage decreases or there is a disconnection, the system may
not be able to access the Public Safety Answering Point (PSAP).
■When replacing DCM to a new one
ERA-GLONASS have to be activated. Contact any authorized Lexus retailer or Lexus
authorized repairer, or any reliable repairer.

389
6Maintenance and care
GS450h_300h_OM_OM30F92E_(EE)
6-1. Maintenance and care
Cleaning and protecting
the vehicle exterior ................390
Cleaning and protecting
the vehicle interior.................. 394
6-2. Maintenance
Maintenance
requirements ............................ 397
6-3. Do-it-yourself maintenance
Do-it-yourself service
precautions................................ 399
Hood ................................................ 401
Positioning a floor jack ............ 402
Engine compartment ...............403
12-volt battery ...............................412
Tires ...................................................416
Tire inflation pressure .............. 429
Wheels ............................................ 431
Air conditioning filter ............... 433
Electronic key battery.............. 435
Checking and replacing
fuses.............................................. 437
Light bulbs..................................... 442