2017 Lexus GS450h engine

2054-1. Before driving
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Driving
GS450h_300h_OM_OM30F92E_(EE)
WARNING
Observe the following precautions. Failure to do so may result in death or serious injury.
■When the vehicle is stopped
●Do not depress the accelerator pedal unnecessarily.If the shift lever is any position other than P or N, the vehicle may accelerate suddenlyand unexpectedly, causing an accident.
●In order to prevent accidents due to the vehicle rolling away, always keep depressingthe brake pedal while stopped with the “READY” indicator is illuminated, and applythe parking brake as necessary.
●If the vehicle is stopped on an incline, in order to prevent accidents caused by thevehicle rolling forward or backward, alwa ys depress the brake pedal and securely apply the parking brake as needed.
●Avoid revving or racing the engine. Running the engine at high speed while the vehicle is stopped may cause the exhaustsystem to overheat, which could result in a fire if combustible material is nearby.
■When the vehicle is parked
●Do not leave glasses, cigarette lighters, spray cans, or soft drink cans in the vehicle when it is in the sun.
Doing so may result in the following:
• Gas may leak from a cigarette lighter or spray can, and may lead to a fire. • The temperature inside the vehicle may cause the plastic lenses and plastic mate-
rial of glasses to deform or crack. • Soft drink cans may fracture, causing the contents to spray over the interior of thevehicle, and may also cause a short circuit in the vehicle’s electrical components.
●Do not leave cigarette lighters in the vehicle. If a cigarette lighter is in a place such asthe glove box or on the floor, it may be lit accidentally when luggage is loaded or the
seat is adjusted, causing a fire.
●Do not attach adhesive discs to the windshield or windows. Do not place containers such as air fresheners on the instrument panel or dashboard. Adhesive discs or con-
tainers may act as lenses, causing a fire in the vehicle.
●Do not leave a door or window open if the curved glass is coated with a metallized film such as a silver-colored one. Reflecte d sunlight may cause the glass to act as a
lens, causing a fire.
●Always apply the parking brake, shift the shift lever to P, stop the hybrid system and lock the vehicle.
Do not leave the vehicle unattended while the “READY” indicator is illuminated. If the vehicle is parked with the shift lever in P but the parking brake is not set, thevehicle may start to move, possibly leading to an accident.
●Do not touch the exhaust pipes while the “READY” indicator is illuminated or imme-diately after turning the hybrid system off.Doing so may cause burns.

2074-1. Before driving
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Driving
GS450h_300h_OM_OM30F92E_(EE)
NOTICE
■When driving the vehicle
●Do not depress the accelerator and brake pedals at the same time during driving, as this may restrain the hybrid system output.
●Do not use the accelerator pedal or depress the accelerator and brake pedals at thesame time to hold the vehicle on a hill.
■When parking the vehicle
Always set the parking brake, and shift the shift lever to P. Failure to do so may cause the vehicle to move or the vehicle may accelerate suddenly if the accelerator pedal isaccidentally depressed.
■Avoiding damage to vehicle parts
●Do not turn the steering wheel fully in either direction and hold it there for anextended period of time.
Doing so may damage the power steering motor.
●When driving over bumps in the road, drive as slowly as possible to avoid damaging the wheels, underside of the vehicle, etc.
■If you get a flat tire while driving
A flat or damaged tire may cause the following situations. Hold the steering wheel firmly and gradually depress the brake pedal to slow down the vehicle.
●It may be difficult to control your vehicle.
●The vehicle will make abnormal sounds or vibrations.
●The vehicle will lean abnormally.
Information on what to do in case of a flat tire ( P. 498, 509)
■When encountering flooded roads
Do not drive on a road that has flooded after heavy rain etc. Doing so may cause the
following serious damage to the vehicle:
●Engine stalling
●Short in electrical components
●Engine damage caused by water immersion
In the event that you drive on a flooded road and the vehicle is flooded, be sure to have any authorized Lexus retailer or Lexus auth orized repairer, or any reliable repairer
check the following:
●Brake function
●Changes in quantity and quality of oil and fluid used for the engine, hybrid transmis-
sion, differential, etc.
●Lubricant condition for the propeller shaft, bearings and suspension joints (where possible), and the function of all joints, bearings, etc.

2114-1. Before driving
4
Driving
GS450h_300h_OM_OM30F92E_(EE)
■Total trailer weight and permissible drawbar load
Total trailer weight
Weight of the trailer itself plus the trailer load should be within the max-
imum towing capacity. Exceeding this weight is dangerous. ( P. 546)
When towing a trailer, use a friction
coupler or friction stabilizer (sway control device).
Permissible drawbar load
Allocate the trailer load so that the drawbar load is greater than 25 kg (55.1 lb.) or4% of the towing capacity. Do not let the drawbar load exceed the indicatedweight. ( P. 546)
■Information tag (manufacturer’s label)
Gross vehicle mass
The combined weight of the driver, passengers, towing hitch, luggage,
total curb mass and drawbar load should not exceed the gross vehiclemass by more than 100 kg (220.5
lb.). Exceeding this weight is danger- ous.
Maximum permissible rear axle capacity
The weight borne by the rear axle should not exceed the maximum permissibleaxle capacity by 15% or more. Exceeding this weight is dangerous.
The values for towing capacity were derived from testing conducted at sea level.
Take note that engine output and towing capacity will be reduced at high altitudes.
Important points regarding trailer loads
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1
WARNING
■When the gross vehicle mass limit or maximum permissible axle capacity is exceeded
Do not exceed the established speed limit fo r towing a trailer in built-up areas or 100 km/h (62 mph), whichever is lower.
Failing to observe this precaution may lead to an accident causing death or serious injury.
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2154-1. Before driving
4
Driving
GS450h_300h_OM_OM30F92E_(EE)
■Passing other vehicles
Consider the total combined length of your vehicle and trailer and ensure that
the vehicle-to-vehicle distance is sufficient before executing lane changes.
■Transmission information
To maintain engine braking efficiency, when using engine braking, when driv-
ing on a long steep downgrade, do not use the transmission in D. (P. 227)
■If the engine overheats
Towing a loaded trailer up a long, steep incline in temperatures exceeding
30 C (85F) may result in the engine overheating. If the engine coolant tem-
perature gauge indicates that the engine is overheating, turn the air condition-
ing off immediately, leave the road and stop the vehicle in a safe place.
( P. 535)
■When parking the vehicle
Always place wheel chocks under the wheels of both the vehicle and trailer.
Firmly set the parking brake and shift the shift lever to P.
WARNING
Follow all the instructions described in this se ction. Failure to do so could cause an acci- dent resulting in death or serious injury.
■Trailer towing precautions
When towing, make sure that none of the weight limits are exceeded. ( P. 211)
■To avoid accident or injury
●Do not tow a trailer when the compact spare tire is installed on your vehicle.
●Do not tow a trailer when the tire installed is repaired with the emergency tire punc- ture repair kit.
●Do not use cruise control (if equipped) or dynamic radar cruise control with full-
speed range (if equipped) when trailer towing.
■Vehicle speed in towing
Observe the legal maximum speeds for trailer towing.
■Before descending hills or long declines
Reduce speed and downshift. However, never downshift suddenly while descending steep or long downhill grades.
■Operation of the brake pedal
Do not hold the brake pedal depressed often or for long periods of time.
Doing so may result in the brake ov erheating or reduce braking effects.

2224-2. Driving procedures
GS450h_300h_OM_OM30F92E_(EE)
EV drive mode
Turns EV drive mode on/off
When EV drive mode is turned on, “EV
MODE” will be displayed on the multi- information display. Pressing the switchwhen in EV drive mode will return the
vehicle to normal driving (using the gas- oline engine and electric motor [tractionmotor]).
■Situations in which EV drive mode cannot be turned on
It may not be possible to turn EV drive mode on in the following situations. If it cannot be turned on, a buzzer will sound and a message will be shown on the multi-information dis-
play.
●The temperature of the hybrid system is high. The vehicle has been left in the sun, driv en on a hill, driven at high speeds, etc.
●The temperature of the hybrid system is low. The vehicle has been left in temperatures lower than about 0 C (32F) for a long period of time etc.
●The gasoline engine is warming up.
●The hybrid battery (traction battery) is low.The remaining battery level indicated in the “Energy monitor” display is low. ( P. 126)
●Vehicle speed is high.
●The accelerator pedal is depressed firmly or the vehicle is on a hill etc.
●The windshield defogger is in use.
In EV drive mode, electric power is supplied by the hybrid battery (traction
battery), and only the electric motor (tra ction motor) is used to drive the vehi-
cle.
This mode allows you to dr ive in residential areas early in the morning and late
at night, or in indoor parking lots etc. without concern for noises and gas emis-
sions.

2234-2. Driving procedures
4
Driving
GS450h_300h_OM_OM30F92E_(EE)
■Switching to EV drive mode when the gasoline engine is cold
If the hybrid system is started while the gaso line engine is cold, the gasoline engine will start automatically in order to warm up. In th is case, you will become unable to switch to
EV drive mode.
■Automatic cancelation of EV drive mode
When driving in EV drive mode, the gasoline engine may automatically restart in the fol- lowing situations. When EV drive mode is can celed, a buzzer will sound and the EV drive
mode indicator will flash and go off.
●The hybrid battery (traction battery) becomes low. The remaining battery level indicated in the “Energy monitor” display is low. ( P. 126)
●Vehicle speed is high.
●The accelerator pedal is depressed firmly or the vehicle is on a hill etc.
When it is possible to inform the driver of automatic cancelation in advance, a prior
notice screen will appear on the multi-information display.
■Possible driving distance when driving in EV drive mode
EV drive mode’s possible driving distance ranges from a few hundred meters to approxi-
mately 1 km (0.6 mile). However, dependin g on vehicle conditions, there are situations when EV drive mode cannot be used. (The distance that is possible depends on the hybrid battery [traction battery] level and
driving conditions.)
■Fuel economy
The hybrid system is designed to achieve the best possible fuel economy during normal
driving (using the gasoline engine and electr ic motor [traction motor]). Driving in EV drive mode more than necessary may lower fuel economy.
To prevent gasoline engine warm up in order to
reduce noises, start the hybrid system without starting the gasoline engine, pressing the powerswitch with fully depressing the brake pedal and
pressing the EV drive mode switch.
WARNING
■Caution while driving
When driving in EV dr ive mode, pay special attention to the area around the vehicle. Because there is no engine noise, pedestrian s, people riding bicycles or other people
and vehicles in the area may not be aware of the vehicle starting off or approaching them, so take extr a care while driving.

2244-2. Driving procedures
GS450h_300h_OM_OM30F92E_(EE)
Hybrid transmission
While the power switch is in ON mode, move the shift lever with the brake
pedal depressed.
When shifting the shift lever between P and D, make sure that the vehicle is com- pletely stopped.
*1: To improve fuel efficiency and reduce noises , set the shift lever in D for normal driving.
*2: By selecting shift ranges using S mode, you can control accelerating forces and
engine braking forces.
Shifting the shift lever
Shift position purpose
Shift positionObjective or function
PParking the vehicle/starting the hybrid system
RReversing
NNeutral (Condition in which the power is not transmitted)
DNormal driving*1
SS mode driving*2 ( P. 227)

2264-2. Driving procedures
GS450h_300h_OM_OM30F92E_(EE)
To drive using temporary shift range selection, operate the “-” or “+” paddle shift
switch.
When the “-” paddle shift switch is operated, the shift range will be downshifted
to a range that enables engine braking force that is suitable to driving conditions.
When the “+” paddle shift switch is operated, the shift range will be one gear
upper than the gear in use during normal D position driving.
Changing the shift range allows restriction of the highest shift range, preventing
unnecessary upshifting and enabling th e level of engine braking force to be
selected.
Upshifting
Downshifting
GS450h: The selected shift range, from D1 to D8,will be displayed in the meter.
GS300h: The selected shift range, from D1 to D6,will be displayed in the meter.
To return to normal D position driving, the “+” paddle shift switch must be helddown for a period of time.
■Shift ranges and their functions
A lower shift range will provide greater engi ne braking forces than a higher shift range.
Selecting shift ranges in the D position
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Meter displayFunctionGS450hGS300h
D2-D8D2-D6
A gear in the range between D1 and the selected shift
range is automatically chosen depending on vehicle speed and driving conditions
D1Setting the shift range at D1