service LEXUS GS300H 2019 User Guide

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6-2. Maintenance
Maintenance and care
GS450h_300h_OM_OM30F92E_(EE)
Maintenance requirements
Scheduled maintenance should be performed at specified intervals according to
the maintenance schedule.
For details about maintenance items and sche dules, refer to the “Lexus Service Book- let” or “Lexus Warranty Booklet”.
What about do-it-yourself maintenance?
Many of the maintenance items are easy to do yourself if you have a little mechanicalability and a few basic automotive tools.
Note, however, that some maintenance task s require special tools and skills. These
are best performed by qualified technicians. Even if you’re an experienced do-it-your- self mechanic, we recommend that repairs and maintenance be conducted by anyauthorized Lexus retailer or Lexus authoriz ed repairer, or any reliable repairer. Any
authorized Lexus retailer or repairer will keep a record of maintenance, which could be useful should you ever require Warranty Service. Should you choose to select aqualified and equipped professional other th an an authorized Lexus repairer to ser-
vice or maintain your vehicle, we recommend that you request that a record of main- tenance be kept.
■Where to go for maintenance service?
In order to maintain your vehicle in the best possible condition, Lexus recommends that maintenance service operations as well as ot her inspections and repairs be carried out
by authorized Lexus retailers or Lexus authoriz ed repairers, or any reliable repairers. For repairs and services covered by your warranty, please visit an authorized Lexus retailer or repairer, who will use genuine Lexus parts in repairing any difficulties you may
encounter. There can also be advantages in utilizing authorized Lexus retailers or repair- ers for non-warranty repairs and services, as members of the Lexus network will be able to expertly assist you with an y difficulties you may encounter.
Your Lexus retailer or Lexus authorized repair er, or any reliable repairer will perform all of the scheduled maintenance on your vehicl e reliably and economically due to their experience with Lexus vehicles.
To ensure safe and economical driving, day-to-day care and regular mainte-
nance are essential. Lexus recommends the following maintenance:
Scheduled maintenance
Do-it-yourself maintenance

3986-2. Maintenance
GS450h_300h_OM_OM30F92E_(EE)
■Does your vehicle need repairs?
Be on the alert for changes in performance and sounds, and visual tip-offs that indicate service is needed. Some important clues are:
●Engine missing, stumbling or pinging
●Appreciable loss of power
●Strange engine noises
●A fluid leak under the vehicle (However, water dripping from the air conditioning sys-tem after use is normal.)
●Change in exhaust sound (This may indicate a dangerous carbon monoxide leak. Drive
with the windows open and have the exhaust system checked immediately.)
●Flat-looking tires, excessive tire sque al when cornering, uneven tire wear
●Vehicle pulls to one side when driven straight on a level road
●Strange noises related to suspension movement
●Loss of brake effectiveness, spongy feeling brake pedal, pedal almost touches the floor, vehicle pulls to one side when braking
●Engine coolant temperature continually higher than normal ( P. 105)
If you notice any of these clues, take your vehicle to any authorized Lexus retailer or Lexus authorized repairer, or any reliable repairer as soon as possible. Your vehicle may
need adjustment or repair.
WARNING
■If your vehicle is not properly maintained
Improper maintenance could result in serious damage to the vehicle and possible death or serious injury.
■Handling of the 12-volt battery
12-volt battery posts, terminals and related accessories contain lead and lead com- pounds which are known to cause brain damage. Wash your hands after handling.
( P. 412)

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6-3. Do-it-yourself maintenance
Maintenance and care
GS450h_300h_OM_OM30F92E_(EE)
Do-it-yourself service precautions
If you perform maintenance by yourself, be sure to follow the correct proce-
dure as given in these sections.
ItemsParts and tools
12-volt battery
condition ( P. 412)
•Grease
• Conventional wrench (for terminal clamp bolts)
Engine/power
control unit coolant level ( P. 409)
•“Toyota Super Long Life Coolant” or a similar high quality ethylene glycol-based non-silicate, non-amine, non-nitrite
and non-borate coolant with long-life hybrid organic acid technology“Toyota Super Long Life Coolant” is pre-mixed with 50%
coolant and 50% deionized water.
• Funnel (used only for adding coolant)
Engine oil level ( P. 406)
• “Toyota Genuine Motor Oil” or equivalent
•Rag or paper towel
• Funnel (used only for adding engine oil)
Fuses (P. 437)• Fuse with same amperage rating as original
Light bulbs ( P. 442)
• Bulb with same number and wattage rating as original
• Phillips-head screwdriver• Flathead screwdriver
•Wrench
Radiator and condenser ( P. 411)
Tire inflation
pressure ( P. 429)• Tire pressure gauge• Compressed air source
Washer fluid
( P. 411)
• Water or washer fluid containing antifreeze (for winter use)
• Funnel (used only for adding water or washer fluid)

4086-3. Do-it-yourself maintenance
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■After changing the engine oil
The engine oil maintenance data should be reset. Perform the following procedures:
Press or of the meter control switch and select .
Press or of the meter control switch an d select “Vehicle Settings”. Then press
.
Press or of the meter control switch and select “Oil Maintenance”. Then press
.
Select the “Yes” and press .
A message is displayed on the multi-informa- tion display.
WARNING
■Used engine oil
●Used engine oil contains potentially harm ful contaminants which may cause skin dis- orders such as inflammation and skin cancer, so care should be taken to avoid pro-
longed and repeated contact. To remove used engine oil from your skin, wash thoroughly with soap and water.
●Dispose of used oil and filters only in a safe and acceptable manner. Do not dispose of
used oil and filters in household trash, in sewers or onto the ground. Call any authorized Lexus retailer or Le xus authorized repairer, or any reliable repairer, service station or auto parts st ore for information concerning recycling or
disposal.
●Do not leave used engine oil within the reach of children.
NOTICE
■To prevent serious engine damage
Check the oil level on a regular basis.
■When replacing the engine oil
●Be careful not to spill engine oil on the vehicle components.
●Avoid overfilling, or the engine could be damaged.
●Check the oil level on the dipstick every time you refill the vehicle.
●Be sure the engine oil filler cap is properly tightened.
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4286-3. Do-it-yourself maintenance
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NOTICE
■Repairing or replacing tires, wheels, tire pressure warning valves, transmitters and tire valve caps (vehicles with the tire pressure warning system)
●When removing or fitting the wheels, tires or the tire pressure warning valves and
transmitters, contact any authorized Lexus retailer or Lexus authorized repairer, or any reliable repairer as the tire pressure warning valves and transmitters may be dam- aged if not handled correctly.
●Make sure to install the tire valve caps. If the tire valve caps are not installed, water could enter the tire pressure warning valv es and the tire pressure warning valves could be bound.
●When replacing tire valve caps, do not use tire valve caps other than those specified.The cap may become stuck.
■To avoid damage to the tire pressure warning valves and transmitters (vehicles with
the tire pressure warning system)
When a tire is repaired with liquid sealants, the tire pressure warning valve and trans- mitter may not operate properly. If a liquid sealant is used, contact any authorized
Lexus retailer or Lexus authorized repairer, or any reliable repairer or other qualified service shop as soon as possible. After use of liquid sealant, make sure to replace the tire pressure warning valve and transmitte r when repairing or replacing the tire.
( P. 418)
■Driving on rough roads
Take particular care when driving on roads with loose surfaces or potholes.
These conditions may cause losses in tire inflation pressure, reducing the cushioning ability of the tires. In addition, driving on rough roads may cause damage to the tiresthemselves, as well as the vehicle’s wheels and body.
■Low profile tires (except 225/50R17 tires)
Low profile tires may cause greater damage than usual to the tire wheel when sustain- ing impact from the road surface. Therefore, pay attention to the following:
●Be sure to use proper tire inflation pressu re. If tires are under-inflated, they may be damaged more severely.
●Avoid potholes, uneven pavement, curbs an d other road hazards. Failure to do so
may lead to severe tire and wheel damage.
■If tire inflation pressure of each tire becomes low while driving
Do not continue driving, or your tires and/or wheels may be ruined.

4326-3. Do-it-yourself maintenance
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WARNING
■When replacing wheels
●Do not use wheels that are a different size from those recommended in the Owner’s Manual, as this may result in a loss of handling control.
●Never use an inner tube in a leaking wheel which is designed for a tubeless tire. Doingso may result in an accident, causing death or serious injury.
●Except for vehicles with steel spare wheel: Do not install steel wheels.
The wheel contact surface could be damaged, and the wheel could come off while driving, which could lead to an accident re sulting in death or serious injury. (except for vehicles with steel spare wheel)
■Use of defective wheels prohibited
Do not use cracked or deformed wheels. Doing so could cause the tire to leak air during driving, possibly causing an accident.
NOTICE
■Replacing tire pressure warning valves and transmitters (vehicles with the tire pres-sure warning system)
●Because tire repair or replacement may affe ct the tire pressure warning valves and transmitters, make sure to have tires se rviced by any authorized Lexus retailer or Lexus authorized repairer, or any reliable repairer or other qualified service shop. In
addition, make sure to purchase your tire pressure warning valves and transmitters at any authorized Lexus retailer or Lexus auth orized repairer, or any reliable repairer.
●Ensure that only genuine Lexus wheels are used on your vehicle.
Tire pressure warning valves and transmitte rs may not work properly with non-genu- ine wheels.

4346-3. Do-it-yourself maintenance
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Remove the air conditioning filter
from the filter case and replace it
with a new one.
The “ UP” marks shown on the filter
and the filter case should be pointing up.
■Changing interval
Inspect and replace the air conditioning filt er according to the maintenance schedule. In dusty areas or areas with heavy traffic flow, early replacement may be required. (For
scheduled maintenance information, please refer to the “Lexus Service Booklet” or “Lexus Warranty Booklet”.)
■If air flow from the vents decreases dramatically
The filter may be clogged. Check the filter and replace if necessary.
■Air conditioning filter with deodorizing function
When fragrances are placed in your vehicle, the deodorizing effect may become signifi-
cantly weakened in a short period. When an air conditioning odor comes out cont inuously, replace the air conditioning filter.
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NOTICE
■When using the air conditioning system
When fragrances are placed in your vehicle, the deodorizing effect may become sig- nificantly weakened in a short period.
When an air conditioning odor comes out continuously, replace the air conditioning fil- ter.

4547-2. Steps to take in an emergency
GS450h_300h_OM_OM30F92E_(EE)
If your vehicle needs to be towed
The following may indicate a problem with your transmission. Contact any
authorized Lexus retailer or Lexus authorized repairer, or any reliable repairer or
commercial towing service before towing.
●The hybrid warning message shows on the multi-information display and the
vehicle does not move.
●The vehicle makes an abnormal sound.
Do not tow with a sling-type truck to
prevent body damage.
If towing is necessary, we recommen d having your vehicle towed by any
authorized Lexus retailer or Lexus au thorized repairer, or any reliable
repairer or commercial towing service, using a wheel-lift type truck or flatbed
truck.
Use a safety chain system for all towing , and abide by all state/provincial and
local laws.
Situations when it is necessary to contact dealers before towing
Towing with a sling-type truck

5227-2. Steps to take in an emergency
GS450h_300h_OM_OM30F92E_(EE)
NOTICE
■When performing an emergency repair
●Perform the emergency repair without removing the nail or screw that has punctured the tread of the tire. If the object that has punctured the tire is removed, repair by the
emergency tire puncture repair kit may not be possible.
●The repair kit is not waterproof. Make sure that the repair kit is not exposed to water, such as when it is being used in the rain.
●Do not put the repair kit directly onto dusty ground such as sand at the side of theroad. If the repair kit vacuums up dust etc., a malfunction may occur.
■Handling the emergency tire puncture repair kit
●The repair kit power source should be 12 V DC suitable for vehicle use. Do not con- nect the repair kit to any other source.
●If gasoline splatters on the repair kit, the repair kit may deteriorate. Take care not to
allow gasoline to contact it.
●Store the emergency tire puncture repair kit in the trunk. The kit may be thrown around during sudden braking and so forth, damaging the kit.
●Store the repair kit in the trunk out of reach of children.
●Do not disassemble or modify the repair kit. Do not subject parts such as the air pres- sure indicator to impacts. This may cause a malfunction.
■To avoid damage to the tire pressure warning valves and transmitters (vehicles withthe tire pressure warning system)
When a tire is repaired with liquid sealants, the tire pressure warning valve and trans-
mitter may not operate properly. If a liquid sealant is used, contact any authorized Lexus retailer or Lexus authorized repairer, or any reliable repairer or other qualified service shop as soon as possible. After use of liquid sealant, make sure to replace the
tire pressure warning valve and transmitte r when repairing or replacing the tire. ( P. 418)

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8-1. Specifications
Vehicle specifications
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Oil viscosity (0W-20 is explained here as an example):
• The 0W in 0W-20 indicates the characteristic of the oil which allows cold
startability. Oils with a lower value before the W allow for easier starting of
the engine in cold weather.
• The 20 in 0W-20 indicates the viscos ity characteristic of the oil when the
oil is at high temperature. An oil with a higher viscosity (one with a higher
value) may be better suited if the vehicle is operated at high speeds, or
under extreme load conditions.
How to read oil container labels:
Either or both API registered marks are added to some oil containers to help
you select the oil you should use.
API Service Symbol
Top portion: “API SERVICE SN” means the oil quality designation by
American Petroleum Institute (API).
Center portion: “SAE 0W-20” means the SAE viscosity grade.
Lower portion: “Resource-Conserv- ing” means that the oil has fuel-saving and environmental protection capa-
bilities.
ILSAC Certification Mark
The International Lubricant Specificatio n Advisory Committee (ILSAC) Certifica- tion Mark is displayed on the front of the container.
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