2019 LEXUS RX450H automatic

6718-2. Steps to take in an emergency
8
When trouble arises
RX450h_RX450hL_U
■If “Forward Camera System Unavailable” or “Forward Camera System
Unavailable Clean Windshield” is displayed
The following systems may be suspended until the problem shown in the mes-
sage is resolved. (P. 296)
●PCS (Pre-Collision System)
●LKA (Lane-Keeping Assist)
●Dynamic radar cruise control with full-speed range
●Automatic High Beam
■If “Oil Maintenance Required Soon” is shown
Indicates that the engine oil is scheduled to be changed.
Check the engine oil, and change if necessary. After changing the engine oil,
the message should be reset. ( P. 600)
■If “Oil Maintenance Required” is shown
Indicates that the engine oil should be changed.
Check and change the engine oil, and o il filter by your Lexus dealer. After
changing the engine oil, the message should be reset. ( P. 600)
■If “Maintenance Required Soon” is displayed (U.S.A. only)
Indicates that all maintenance according to the driven distance on the mainte-
nance schedule
* should be performed soon.
Comes on approximately 4500 miles (7200 km) after the message has been
reset.
If necessary, perform maintenance. Plea se reset the message after the main-
tenance is performed. ( P. 588)
*: Refer to the separate “Scheduled Mainte nance” or “Owner’s Manual Supplement”
for the maintenance interval applicable to your vehicle.

6888-2. Steps to take in an emergency
RX450h_RX450hL_U
WARNING
■When using the compact spare tire
●Remember that the compact spare tire provided is specifically designed for use with
your vehicle. Do not use your comp act spare tire on another vehicle.
●Do not use more than one compact spare tire simultaneously.
●Replace the compact spare tire with a standard tire as soon as possible.
●Avoid sudden acceleration, abrupt steering, sudden braking and shifting operations
that cause sudden engine braking.
■When the compact spare tire is attached
The vehicle speed may not be correctly detected, and the following systems may not
operate correctly:
Also, not only can the following system not be utilized fully, but it may even negatively
affect the drive-train components:
•E-Four
■Speed limit when using the compact spare tire
Do not drive at speeds in excess of 50 mph (80 km/h) when a compact spare tire is
installed on the vehicle.
The compact spare tire is not designed for driving at high speeds. Failure to observe
this precaution may lead to an accident causing death or serious injury.
■After using the tools and jack
Before driving, make sure all the tools and jack are securely in place in their storage
location to reduce the possibilit y of personal injury during a collision or sudden brak-
ing.
• ABS & Brake assist
•VSC
•TRAC
•EPS
• Trailer Sway Control
•VDIM
• Adaptive Variable Suspension System (if equipped)
• Dynamic radar cruise control with full- speed range
• PCS (Pre-Collision System)
• LKA (Lane-Keeping Assist) • Automatic High Beam
• AFS (Adaptive Front-lighting System)
(if equipped)
• Tire pressure warning system
• Intuitive parking assist (if equipped)
• Intelligent Clearance Sonar (ICS) (if equipped)
• Lexus parking assist monitor (if equipped)
• Panoramic view monitor (if equipped)
• BSM (Blind Spot Monitor) (if
equipped)
• Navigation system (if equipped)

6988-2. Steps to take in an emergency
RX450h_RX450hL_U
■Charging the 12-volt battery
The electricity stored in the 12-volt battery will discharge gradually even when the vehicle
is not in use, due to natural discharge and the draining effects of certain electrical appli-
ances. If the vehicle is left for a long time, the 12-volt battery may discharge, and the
hybrid system may be unable to start. (The 12-volt battery recharges automatically while
the hybrid system is operating.)
■When the 12-volt battery is removed or discharged
●In some cases, it may not be possible to un lock the doors using the smart access system
with push-button start when the 12-volt battery is discharged. Use the wireless remote
control or the mechanical key to lock or unlock the doors.
●The hybrid system may not start on the first attempt after the 12-volt battery has
recharged but will start normally after the second attempt. This is not a malfunction.
●The power switch mode is memorized by the vehicle. When the 12-volt battery is
reconnected, the system will retu rn to the mode it was in before the 12-volt battery was
discharged. Before disconnect ing the 12-volt battery, turn the power switch off.
If you are unsure what mode the power switch was in before the 12-volt battery dis-
charged, be especially careful when reconnecting the 12-volt battery.
●The power back door must be initialized. ( P. 150)
■When replacing the 12-volt battery
●RX450h: Use a Central Degassing type 12 -volt battery (European Regulations).
RX450hL: Use a 12-volt battery designed for this vehicle.
●RX450h: Use a 12-volt battery that the case size is same as the previous one (LN2),
20 hour rate capacity (20HR) is equivalent (60Ah) or greater, and performance rating
(CCA) is equivalent (460A) or greater.
• If the sizes differ, the 12-volt battery cannot be properly secured.
• If the 20 hour rate capacity is low, even if the time period where the vehicle is not used is a short time, the 12-volt battery may discharge and the hybrid system may
not be able to start.

7058-2. Steps to take in an emergency
8
When trouble arises
RX450h_RX450hL_U
Start the hybrid system and check if “Hybrid System Overheated Reduced
Output Power” is shown on the multi-information display.
If the message does not disappear:
Stop the hybrid system and contact your Lexus dealer.
If the message is not displayed:
Have the vehicle inspected at the nearest Lexus dealer.
WARNING
■To prevent an accident or injury 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 h ood, 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 “READY” indicator is off.
When the hybrid system is operating, the gasoline engine may automatically start, or
the cooling fans may suddenly operate even if the gasoline engine stops. Do not
touch or approach rotating parts such as th e fans, which may lead to fingers or cloth-
ing (especially a tie, a scarf or a muffler) getting caught, resulting in serious injury.
●Do not loosen the radiator cap and the coolant reservoir caps wh ile the hybrid system
and radiator are hot.
High temperature steam or coolant could spray out.
NOTICE
■When adding engine/power control unit coolant
Add coolant slowly after the hybrid system has cooled down sufficiently. Adding cool
coolant to a hot hybrid system too quickly can cause damage to the hybrid system.
■To prevent damage to the cooling system
Observe the following precautions:
●Avoid contaminating the coolant with foreig n matter (such as sand or dust etc.).
●Do not use any coolant additive.
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7129-1. Specifications
RX450h_RX450hL_U
■Engine number
The engine number is stamped on
the engine block as shown.
Front
Rear
Engine
Model3.5 L 6-cylinder (2GR-FXS)
Type6-cylinder V type, 4-cycle, gasoline
Bore and stroke3.70  3.27 in. (94.0  83.0 mm)
Displacement210.9 cu. in. (3456 cm3)
Valve clearance (engine cold)Automatic adjustment
Fuel
Fuel typeUnleaded gasoline only
Octane Rating91 (Research Octane Number 96) or higher
Fuel tank capacity (Reference)17.2 gal. (65 L, 14.3 Imp. gal.)
Electric motor (traction motor)
TypePermanent magnet synchronous motor
Maximum output123 kW
Maximum torque247 ft•lbf (335 N•m, 34.2 kgf•m)
TypePermanent magnet synchronous motor
Maximum output50 kW
Maximum torque103 ft•lbf (139 N•m, 14.2 kgf•m)

7389-2. Customization
RX450h_RX450hL_U
■Door lock ( P. 136, 692)
FunctionDefault settingCustomized setting
Unlocking using a mechanical
key
Driver’s door
unlocked in one
step, all doors
unlocked in two
step
All doors unlocked
in one step—O
Automatic door locking function
Shift position
linked door locking
operationOff
OOSpeed linked door
locking operation
Automatic door unlocking func-
tion
Shift position
linked door
unlocking opera-
tionOff
OODriver’s door
linked door
unlocking opera-
tion
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7399-2. Customization
9
Vehicle specifications
RX450h_RX450hL_U
■Power back door (P. 142)
*: If equipped
FunctionDefault settingCustomized setting
Power back door switch opera-
tionPress for 1 secondOne short press—O
Automatic closing of the back
door when loweredOnOff—O
Automatic opening of the back
door using the back door opener
switch
OnOff—O
Power back door opening posi-
tion51 to 5OO
Buzzer volumeLevel 3Level 1—OLevel 2
Power back door/touchless sen-
sor*On
Power back door:
On
Touchless sensor:
Off
—O
Off
Power back door open/close
buzzer
When the back
door begins to
operate: On
While the back
door is operating:
Off
Off
—O
When the back
door begins to
operate: Off
While the back
door is operating:
On
On
Touchless sensor* sensitivityLevel 2 (standard)Level 1 (lowest) to
level 3 (highest)—O
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7409-2. Customization
RX450h_RX450hL_U
■Smart access system with push-button start and wireless remote control
(  P. 136, 158)
■Smart access system with push-button start ( P. 136, 158)
FunctionDefault settingCustomized setting
Operation buzzer volume5OffOO1 to 7
Operation signal
(Emergency flashers)OnOffOO
Time elapsed before automatic
door lock function is activated if
door is not opened after being
unlocked
60 seconds
Off
—O30 seconds
120 seconds
Open door warning buzzerOffOn—O
Reservation lockOnOff—O
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FunctionDefault settingCustomized setting
Smart access system with push-
button start On Off — O
The doors that are unlocked
using the smart access system
with push-button start can be
selected Driver’s door All the doors O O
Number of consecutive door
lock operations 2 times As many as desired — O
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