2016 LEXUS RX450H engine

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RX450h_U_OM0E013U 56-1. Maintenance and care
Cleaning and protecting
the vehicle exterior ................ 458
Cleaning and protecting
the vehicle inte rior.................. 462
6-2. Maintenance
Maintenance
requirements ............................ 465
General maintenance...............467
Emission inspection and
maintenance (I/M)
programs .....................................470
6-3. Do-it-yourself
maintenance
Do-it-yourself service
precautions.................................. 471
Hood ................................................473
Positioning a floor jack.............. 474
Engine compartment ................475
12-volt battery ............................. 483
Tires.................................................. 487
Tire inflation pressure ............... 496
Wheels ........................................... 499
Air conditioning filter ................ 501
Windshield wiper inserts ........ 504
Electronic key battery.............. 506
Checking and replacing
fuses..............................................508
Headlight aim ................................. 511
Light bulbs ......................................513 7-1. Essential information
Emergency flashers .................. 528
If your vehicle has to be
stopped in an
emergency ................................ 529
7-2. Steps to take in an
emergency
If your vehicle needs to be
towed ........................................... 530
If you think something is
wrong........................................... 535
If a warning light turns
on or a warning buzzer
sounds ......................................... 536
If a warning message is
displayed .................................... 543
If you have a flat tire .................. 549
If the hybrid system will not
start ................................................. 561
If the shift lever cannot be
shifted from P ........................... 563
If the electronic key does
not operate properly ............. 564
If the 12-volt battery is
discharged ................................. 568
If your vehicle overheats .......... 574
If the vehicle becomes
stuck ............................................. 5786
Maintenance and care 7
When trouble arises

10
RX450h_U_OM0E013U Your Lexus is equipped with several sophis ticated 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 (traction battery) status
The recorded data varies according to the ve hicle grade level and op tions with which it is
equipped. Furthermore, these computers do not record conversations, sounds or pic-
tures. ●
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 law suit
• For research purposes where the data is not tied to a specific vehicle or vehicle
owner●
Usage of data collected through Safety Co nnect / Lexus Enform (U.S. mainland only)
If your Lexus has Safety Connect or Lexus Enform and if you have subscribed to those
services, please refer to the Safety Connect / Lexus Enform Telematics Subscription
Service Agreement for information on data collected and its usage.Vehicle data recordings

17Pictorial index
RX450h_U_OM0E013U Windshield wipers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 260 Precautions against winter season . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 390
To prevent freezing (windshield wiper de-icer)
* . . . . . . . . . . . . . . . . . . . . . . . P. 409
Precautions against car wash . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 460
Fuel filler door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 2 6 7Refueling method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 269
Fuel type/fuel tank capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 584
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 487Tire size/inflation pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 589
Winter tires/tire chain. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 3 90
Checking/rotation/tire pressure warning system . . . . . . . . . . . . . . . . . . . . . . . .P. 487
Coping with flat tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .P. 549
Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 473Opening. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 473
Engine oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 585
Coping with overheat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 57 4
Headlights/parking lights/daytime running ligh ts . . . . . . . . . . . . . . . . . . .P. 251
Turn signal lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 244
Fog lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 259
Cornering lights
* . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 252
Stop/tail lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .P. 251
License plate lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .P. 25 1
Back-up lights Shifting the shift lever to R . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 239
Side marker lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .P. 25 14
5
6
7
Light bulbs of the exte rior lights for driving
(Replacing method: P. 513, Watts: P. 590)
* : If equipped8
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10
11
12
13
14
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RX450h_U_OM0E013U 1-3. Hybrid system
The illustration is an example for explanation and may differ from the actual item.
Gasoline engine
Front electric motor (traction motor)
Rear electric motor (traction motor)
*
* : AWD models onlyHybrid system features Your vehicle is a hybrid vehicle. It ha s 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 dr iving conditions, improving fuel effi-
ciency and reducing exhaust emissions.
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3

771-3. Hybrid system
1
For safety and security
RX450h_U_OM0E013U ◆ When stopped/during start off
The gasoline engine stops* when the vehi cle 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 warm-
ing up, etc., the gasoline engine will not automatically stop. (  P. 7 8 )
◆ 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 (tr action battery) is charged.
When the gasoline engine is off while driving, a sound is produced to warn
pedestrians, people riding bicycles or ot her people and vehicles in the surround-
ing area that the vehicle is approaching. The pitch of the sound varies according
to the vehicle speed. When the vehicle speed becomes approximately 15 mph
(25 km/h) or more, the notification sound turns off.Vehicle proximity notification system

78 1-3. Hybrid system
RX450h_U_OM0E013U ■
Regenerative braking
In the following situations, kinetic 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 driv ing with the shift lever in D or S.■
EV indicator
■
Conditions in which the ga soline engine may not stop
The gasoline engine starts and stops automatically. 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 outside source. However, if the vehicle is left parked for a
long time the hybrid battery (traction battery) will slowly discharge. For this reason, be
sure to drive the vehicle at least once ever y few months for at least 30 minutes or 10
miles (16 km). If the hybrid battery (tractio n battery) becomes fully discharged and you
are unable to start the hybrid system, contact your Lexus dealer. ■
Charging the 12-volt battery
 P. 5 7 0 ■
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 ve hicle is being driven by the hybrid battery
(traction battery). If this continues for a few days, contact your Lexus dealer.The EV indicator comes on when the vehicle is
driven using only the electric motor (traction
motor) or the gasoline engine is stopped.

791-3. Hybrid system
1
For safety and security
RX450h_U_OM0E013U ■
Sounds and vibrations spec ific 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 safety, make sure to shift the shift lever to P and
apply the parking brake when parked.
The following sounds or vibrat ions may occur 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 soft clank will be emitted from the hybrid bat-
tery (traction battery), behind the rear seats, when the hybrid system is started or
stopped. ●
Sounds from the hybrid system may be heard when the back door is open. ●
Sounds may be heard from the transmission wh en the gasoline engine starts or stops,
when driving at low speeds, 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 gasoline engine starts or stops. ●
Cooling fan sounds may be heard from the air intake vents under the rear seats. ■
Vehicle proximity notification system
In the following cases, the ve hicle proximity notification system may be difficult for sur-
rounding people to hear. ●
In very noisy areas ●
In the wind or the rain
Also, as the vehicle proximity notification system is installed on the front of the vehicle, it
may be more difficult to hear from the re ar of the vehicle compared to the front.■
Maintenance, repair, re cycling, and disposal
Contact your Lexus dealer regarding maintenance, repair, recycling and disposal. Do
not dispose of the vehicle yourself. ■
Customization
Some functions can be customized. (  P. 6 0 7 )

98 2. Instrument cluster
RX450h_U_OM0E013U Engine coolant temperature gauge Displays the engine coolant temperature
Hybrid System Indicator Displays hybrid system power output or regeneration level (  P. 1 0 0 )
This display changes to a tachometer depe nding on the drive mode, and can be set
to show the tachometer in any driv e mode on the settings display. (  P. 1 0 9 )
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 tempera-
ture is 37°F (3°C) or lower.
Multi-information display Presents the driver with a variety of vehicle data (  P. 1 0 2 )
Displays warning messages in case of a malfunction (  P. 5 4 3 )
Clock Time displayed is linked to the analog clock on the instrument panel. (  P. 4 3 3 )
Speedometer
Fuel gauge
Shift position display (  P. 2 3 9 )
Odometer and trip meter (  P. 1 1 5 )1
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