2018 Lexus GS450h engine

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6-3. Do-it-yourself maintenanceDo-it-yourself service precautions................................ 349
Hood ................................................ 351
Positioning a floor jack ............ 352
Engine compartment ............... 353
12-volt battery ............................. 362
Tires ................................................. 365
Tire inflation pressure .............. 375
Wheels ........................................... 378
Air conditioning filter ...............380
Electronic key battery.............. 382
Checking and replacing fuses.............................................. 384
Headlight aim (vehicles with single-beam head lights) ...... 389
Light bulbs ......................................391
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
7When trouble arises

GS450h_OM_OM30G62U_(U)
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Your Lexus is equipped with several sophisticated computers that will record certain
data, such as:• Engine speed
• Electric motor speed (traction motor speed)
• Accelerator status
•Brake status
• Vehicle speed
•Shift position
• Hybrid battery (tract ion battery) status
The recorded data varies accord ing to the vehicle grade level and options with which it is
equipped. These computers do not record conversations or sounds, and only record
images outside of the vehicle in certain situations.
●Data transmission
Your vehicle may transmit the data recorded in these computers to Lexus without noti-
fication to you.
●Data usage
Lexus may use the data recorded in these computers to diagnose malfunctions, con-
duct research and development, and improve quality.
Lexus will not disclose the recorded data to a third party except:
• With the consent of the vehicle owner or with the consent of the lessee if the vehicle is leased
• In response to an official request by the police, a court of law or a government
agency
• For use by Lexus in a lawsuit
• For research purposes where the data is not tied to a specific vehicle or vehicle
owner
●Usage of data collected through Lexus Enform (U.S. mainland only)
If your Lexus has Lexus Enform and if you have subscribed to those services, please
refer to the Lexus Enform Telematics Subs cription Service Agreement for information
on data collected and its usage.
●To learn more about the vehicl e data collected, used and shar ed by Lexus, please visit
www.lexus.com/privacyvts/
.
Vehicle data recordings

15Pictorial index
GS450h_OM_OM30G62U_(U)
Windshield wipers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .P. 207
Precautions against winter season . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 276
To prevent freezing (windshield wiper de-icer)
*. . . . . . . . . . . . . . . . . . . . . . . P. 293
Precautions against car wash . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 338
Fuel filler door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 213
Refueling method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 213
Fuel type/fuel tank capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 472
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .P. 365
Tire size/inflation pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .P. 477
Winter tires/tire chain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 27 6
Checking/rotation/tire pressure warning system . . . . . . . . . . . . . . . . . . . . . . P. 365
Coping with flat tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P . 441
Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 351
Opening. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 351
Engine compartment cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 354
Engine oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 473
Coping with overheat. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 46 1
Warning messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 4 12
Headlights/front side marker lights. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 200
Front turn signal lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 195
Parking lights/daytime running lights. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 200
Side turn signal lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 195
Tail lights/rear side marker lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 200
Rear turn signal lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 195
Stop lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 168
Back-up light
Shifting the shift lever to R . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 189
License plate lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 200
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Light bulbs of the exte rior lights for driving
(Replacing method: P. 391, Watts: P. 480)
*: If equipped
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661-2. Hybrid system
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Hybrid system features
The illustration is an example for explanation and may differ from the actual item.
Gasoline engine
Electric motor (traction motor)
◆When stopped/during start off
The gasoline engine stops
* when the vehicle is stopped. During start off, the
electric motor (traction mo tor) drives the vehicle. At slow speeds or when
traveling down a gentle slope, the engine is stopped
* and the electric motor
(traction motor) is used.
When the shift lever is in N, the hybrid battery (traction battery) is not being
charged.
*: When the hybrid battery (traction battery) requires charging or the engine is warming up, etc., the gasoline engi ne will not automatically stop. (→P. 68)
Your vehicle is a hybrid vehicle. It has characteristics different from conven-
tional vehicles. Be sure you are closely familiar with the characteristics of your
vehicle, and operate it with care.
The hybrid system combines the use of a gasoline engine and an electric
motor (traction motor) according to driving conditions, improving fuel effi-
ciency and reducing exhaust emissions.
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671-2. Hybrid system
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For safety and security
◆During normal driving
The gasoline engine is predominantly used. The electric motor (traction
motor) charges the hybrid battery (traction battery) as necessary.
◆When accelerating sharply
When the accelerator pedal is depressed heavily, the power of the hybrid bat-
tery (traction battery) is added to that of the gasoline engine via the electric
motor (traction motor).
◆When braking (regenerative braking)
The wheels operate the electric motor (traction motor) as a power generator,
and the hybrid battery (traction battery) is charged.
When driving with the gasoline engine stopped, a sound, which changes in
accordance with the driving speed, will be played in order to warn people nearby
of the vehicle’s approach. The sound w ill stop when the vehicle speed exceeds
approximately 15 mph (25 km/h).
■Regenerative braking
In the following situations, ki netic energy is converted to electric energy and decelera-
tion force can be obtained in conjunction with the recharging of the hybrid battery (trac-
tion battery).
●The accelerator pedal is released while driving with the shift lever in D or S.
●The brake pedal is depressed while driving with the shift lever in D or S.
■EV indicator
Vehicle proximity notification system
The EV indicator comes on when the vehicle is
driven using only the electric motor (traction
motor) or the gasoline engine is stopped.

681-2. Hybrid system
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■Conditions in which the gasoline engine may not stop
The gasoline engine starts and stops automati cally. However, it may not stop automati-
cally in the following conditions:
●During gasoline engine warm-up
●During hybrid battery (traction battery) charging
●When the temperature of the hybrid battery (traction battery) is high or low
●When the heater is switched on
■Charging the hybrid battery (traction battery)
As the gasoline engine charges the hybrid battery (traction battery), the battery does not
need to be charged from an ou tside source. However, if the vehicle is left parked for a
long time the hybrid battery (traction batter y) will slowly discharge. For this reason, be
sure to drive the vehicle at least once every few months for at least 30 minutes or 10
miles (16 km). If the hybrid battery (traction battery) beco mes fully discharged and you
are unable to start the hybrid system, contact your Lexus dealer.
■Charging the 12-volt battery
→ P. 459
■After the 12-volt battery has discharged or when the terminal has been removed and
installed during exchange, etc.
The gasoline engine may not stop even if the vehicle is being driven by the hybrid battery
(traction battery). If this continues fo r a few days, contact your Lexus dealer.
■Sounds and vibrations specific to a hybrid vehicle
There may be no engine sound or vibration even though the vehicle is able to move with
the “READY” indicator is illuminated. For sa fety, apply the parking brake and make sure
to shift the shift lever to P when parked.
The following sounds or vibrations may occu r when the hybrid system is operating and
are not a malfunction:
●Motor sounds may be heard from the engine compartment.
●Sounds may be heard from the hybrid battery (traction battery) behind the rear seats
when the hybrid system starts or stops.
●Relay operating sounds such as a snap or so ft clank will be emitted from the hybrid bat-
tery (traction battery), behind the rear se ats, when the hybrid system is started or
stopped.
●Sounds from the hybrid system may be heard when the trunk lid is open.
●Sounds may be heard from the transmission wh en the gasoline engine starts or stops,
when driving at low spee ds, or during idling.
●Engine sounds may be heard when accelerating sharply.
●Sounds may be heard due to regenerative braking when the brake pedal is depressed
or as the accelerator pedal is released.
●Vibration may be felt when the ga soline engine starts or stops.
●Cooling fan sounds may be heard from the air intake vents on the both sides of the rear
seatback.

GS450h_OM_OM30G62U_(U)
872. Instrument cluster
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Instrument cluster
WARNING
■If a safety system warning light does not come on
Should a safety system light such as the ABS and SRS warning light not come on when
you start the engine, this could mean that these systems are not available to help pro-
tect you in an accident, which could result in death or serious injury. Have the vehicle
inspected by your Lexus dealer immediately if this occurs.

GS450h_OM_OM30G62U_(U)
892. Instrument cluster
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Instrument cluster
Engine coolant temperature gauge
Displays the engine coolant temperature
Tachometer/Hybrid System Indicator
Tachometer:
Displays the engine speed in revolutions per minute.
Hybrid System Indicator:
Displays hybrid system outp ut or regeneration level (→P. 92)
Outside temperature
Displays the outside temperature within the range of -40 °F (-40 °C) to 122 °F
(50 °C). Low outside temperature indicator comes on when the ambient temperature
is 37 °F (3 °C) or lower.
Clock
Time displayed is linked to the anal og clock on the instrument panel. (→P. 315)
Speedometer
Displays the vehicle speed
Fuel gauge
Displays the quantity of fuel remaining in the tank
Multi-information display
Presents the driver with a variety of driving-related data ( →P. 95)
Displays warning me ssages in case of a malfunction ( →P. 410)
Odometer, trip meter and maintenance required information display
Odometer:
Displays the total distance the vehicle has been driven
Trip meter:
Displays the distance the vehi cle has been driven since the meter was last reset. Trip
meters “A” and “B” can be used to record and display different distances inde-
pendently.
Maintenance required information: • Displays the maintenance required inform ation when the power switch is in ON
mode.
• It can be reset from of th e multi-information display. (→P. 95)
Shift position and shift range
Displays the selected shift posi tion or selected shift range (→P. 189)
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