Page 558 of 620

5587-2. Steps to take in an emergency
GS450h_300h_OM_OM30F00E_(EE)
Start the hybrid system and turn the air conditioning system on to check
that the radiator cooling fans operate and to check for coolant leaks from
the radiator or hoses.
The fans operate when the air conditioning system is turned on immediately after a
cold start. Confirm that the fans are operating by checking the fan sound and air
flow. If it is difficult to check these, turn the air conditioning system on and off
repeatedly. (The fans may not operate in freezing temperatures.)
If the fans are not operating:
Stop the hybrid system immediately and contact any authorized Lexus
dealer or repairer, or another duly qualified and equipped professional.
If the fans are operating:
Have the vehicle inspected at the nearest any authorized Lexus dealer or
repairer, or another duly qualified and equipped professional.
■If “Hybrid System Overheated Reduced Output Power” is shown on the
multi-information displayStop the vehicle in a safe place.
Stop the hybrid system and carefully lift the hood.
After the hybrid system has cooled down, inspect the hoses and radiator
core (radiator) for any leaks.
Radiator
Cooling fans
If a large amount of coolant leaks,
immediately contact any autho-
rized Lexus dealer or repairer, or
another duly qualified and
equipped professional.
6
7
1
2
3
1
2
Page 559 of 620
5597-2. Steps to take in an emergency
7
When trouble arises
GS450h_300h_OM_OM30F00E_(EE)
The coolant level is satisfactory if it is between the “FULL”/“F” and “LOW”/
“L” lines on the reservoir.Reservoir
“FULL”/“F”
“LOW”/“L”
Add coolant if necessary.
Water can be used in an emergency if po wer control unit coolant is unavailable.
Start the hybrid system and check for the multi-information display.
If the message does not disappear:
Stop the hybrid system and contact any authorized Lexus dealer or repairer, or
another duly qualified and equipped professional.
If the message is not displayed:
Have the vehicle inspected at the nearest any authorized Lexus dealer or repairer,
or another duly qualified and equipped professional.
4
1
2
3
XGS450h XGS300h
5
XGS450h XGS300h
6
Page 561 of 620

5617-2. Steps to take in an emergency
7
When trouble arises
GS450h_300h_OM_OM30F00E_(EE)
WA R N I N G
■When inspecting under the hood of your vehicle
Observe the following precautions.
Failure to do so may result in serious injury such as burns.
●If steam is seen coming from under the hood, do not open the hood until the steam
has subsided. The engine compartment may be very hot.
●After the hybrid system has been turned off, check that the indicator on the power
switch and the “READY” indicator are off.
When the hybrid system is operating, the gasoline engine may automatically start, or
the cooling fan may suddenly operate even if the gasoline engine stops. Do not touch
or approach rotating parts such as the fan, which may lead to fingers or clothing
(especially a tie, a scarf or a muffler) ge tting caught, resulting in serious injury.
●Do not loosen the coolant inlet cap or the
coolant reservoir caps while the hybrid sys-
tem and radiator are hot.
High temperature steam or coolant could
spray out. XGS450h
XGS300h
Page 563 of 620

563
7
7-2. Steps to take in an emergency
When trouble arises
GS450h_300h_OM_OM30F00E_(EE)
If the vehicle becomes stuck
Stop the hybrid system. Set the parking brake and shift the shift lever to P.
Remove the mud, snow or sand from around the rear wheels.
Place wood, stones or some other material under the rear wheels to help pro-
vide traction.
Restart the hybrid system.
Shift the shift lever to D or R and rele
ase the parking brake. Then, while exer-
cising caution, depress the accelerator pedal.
■When it is difficult to free the vehicle
Carry out the following procedures if the tires spin or the vehicle becomes
stuck in mud, dirt or snow:
Press to turn off TRC. ( →P. 3 4 6 )
WA R N I N G
■When attempting to free a stuck vehicle
If you choose to push the vehicle back and forth to free it, make sure the surrounding
area is clear to avoid striking other vehi cles, objects or people. The vehicle may also
lunge forward or lunge back suddenly as it becomes free. Use extreme caution.
■When shifting the shift lever
Be careful not to shift the shift lever with the accelerator pedal depressed.
This may lead to unexpected rapid acceleration of the vehicle that may cause an acci-
dent resulting in death or serious injury.
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Page 570 of 620

5708-1. Specifications
GS450h_300h_OM_OM30F00E_(EE)
*: The engine oil capacity is a reference quantity to be used when changing the engine oil. Warm up the engine and turn off the hybrid system, wait more than 5 minutes, and
check the oil level on the dipstick.
■Engine oil selection
“Toyota Genuine Motor Oil” is used in your Lexus vehicle. Lexus recom-
mends the use of approved “Toyota Ge nuine Motor Oil”. Another motor oil of
matching quality can also be used.
Oil grade:
0W-20, 5W-30 and 10W-30:
API grade SL “Energy-Conserving”, SM “Energy-Conserving” or SN
“Resource-Conserving”; or ILSAC multigrade engine oil
15W-40:
API grade SL, SM or SN multigrade engine oil
Recommended viscosity (SAE):
SAE 0W-20 is filled into your Lexus
vehicle at manufacturing, and the
best choice for good fuel economy
and good starting in cold weather.
If SAE 0W-20 oil is not available,
SAE 5W-30 oil may be used. How-
ever, it should be replaced with SAE
0W-20 at the next oil change.
If you use SAE 10W-30 or a higher
viscosity engine oil in extremely low
temperatures, the engine may
become difficult to start, so SAE
0W-20 or 5W-30 engine oil is rec-
ommended.
Lubrication system
Oil capacity
(Drain and refill
reference
*)
With filter
Without filter
GS450hGS300h
6.3 L (6.7 qt., 5.5 Imp.qt.)
5.9 L (6.2 qt., 5.2 Imp.qt.)4.5 L (4.8 qt., 4.0 lmp. qt.)
4.1 L (4.3 qt., 3.6 lmp. qt.)
Temperature range anticipated
before next oil change Preferred
Page 571 of 620

571
8
8-1. Specifications
Vehicle specifications
GS450h_300h_OM_OM30F00E_(EE)
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 viscosit y 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.
1
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Page 583 of 620

583
8
8-2. Customization
Vehicle specifications
GS450h_300h_OM_OM30F00E_(EE)
*1: The default setting varies according to countries.
*2: Some status screens cannot be
registered (indicated on the multi-information display)
*3: 2 of the following items: current fuel consumption, average fuel economy (after reset),
average fuel economy (after refuel), average fuel economy (after start), average vehi-
cle speed (after reset), average vehicle speed (after start), distance (driving range),
distance (after start), elapsed time (after reset), elapsed time (after start), blank
*4:Except F SPORT models
*5:F SPORT models
Drive information screen dis-
played on the third screen of (Drive information 3)
Average fuel economy
(after refuel)
*3—O—
Elapsed time (after start)
Pop-up displayOnOff—O—
Accent color*4Color 1Color 2OO—
Changeover to tachometer
when sport mode is selected Auto
Hybrid system
indicator (always)
—O—Tachometer
(always)
Clock 24-hour display 12-hour display
—O—
Needle
*5Blue Red
—O—
White
Rev indicator
*54000 r/min. 2000 to
6000 r/min. —O—
OFF
Rev peak
*5ON OFF—O—
FunctionDefault settingCustomized setting123
Page 587 of 620
587
8
8-2. Customization
Vehicle specifications
GS450h_300h_OM_OM30F00E_(EE)
■Entry function* (
→ P. 1 5 3 )
*: If equipped
■Wireless remote control ( →P. 1 3 4 )
■Front seats ( →P. 1 7 5 )
FunctionDefault
settingCustomized setting
Smart entry & start systemOnOffO—O
Unlocking operationAll the doorsDriver’s doorO—O
Number of consecutive door
lock operationsAs many as desired2 times——O
123
FunctionDefault
settingCustomized setting
Wireless remote controlOnOff——O
Unlocking operation
Off
(All doors
unlocked in one step)On (Driver’s door unlocked in one step, all doors
unlocked in two steps)
O—O
Trunk unlocking operationPress and hold
(short)
One short press
——O
Push twice
Press and hold (long)
Off
123
FunctionDefaultsettingCustomized setting
Driver’s seat movement when
exiting the vehicleStandardOffO—OPar t i a l
Selecting the door linking driv-
ing position memory with door
unlock operation
Driver’s doorAll doors——O
123