ignition LEXUS RX450h 2022 Owners Manual

3TABLE OF CONTENTS
1
2
3
4
5
6
7
8
9
Trailer towing (vehicles with towing package) ......................................... 171
Dinghy towing ................................. 181
4-2. Driving procedures Power (ignition) switch ............... 182
EV drive mode ............................... 187
Hybrid transmission ..................... 189
Turn signal lever............................. 192
Parking brake ................................. 193
Brake Hold....................................... 196
4-3. Operating the lights and wipers Headlight switch ............................ 198
AHB (Automatic High Beam) ............................................................ 201
Fog light switch ............................. 204
Windshield wipers and washer ........................................................... 204
Rear window wiper and washer ........................................................... 208
4-4. Refueling Opening the fuel tank cap........ 209
4-5. Using the driving support systems Lexus Safety System + 2.0 ........ 212
PCS (Pre-Collision System)..... 218
LTA (Lane Tracing Assist)........ 225
RSA (Road Sign Assist) ............. 234
Dynamic radar crui se control with
full-speed range ......................... 236
BSM (Blind Spot Monitor) ....... 246
PKSA (Parking Support Alert) ........................................................... 250
Intuitive parking assist ................ 252
RCTA (Rear cross traffic alert) function .......................................... 259
PKSB (Parking Support Brake) ........................................................... 265Parking Support Brake function
(static objects) .............................. 271
Parking Support Brake function (rear-crossing vehicles) .......... 274
Driving mode select switch ..... 276
Driving assist systems ................ 278
4-6. Driving tips Hybrid vehicle driving tips ....... 284
Winter driving tips ....................... 286
Utility vehicle precautions........ 288
5-1. Remote Touch/Display Remote Touch................................ 292
Center Display.............................. 294
5-2. Lexus Climate Concierge Lexus Climate Concierge........ 297
5-3. Using the air conditioning system and defogger
Front automatic air conditioning system ............................................ 298
Rear automatic air conditioning system ............................................ 309
Heated steering wheel/seat heat- ers/seat ventilators..................... 312
5-4. Using the interior lights Interior lights list ............................ 315
5-5. Using the storage features List of storage features ............... 318
Luggage compartment features .......................................................... 324
5-6. Using the other interior features Other interior features .............. 329
Garage door opener ................... 341
Compass ......................................... 346
5Interior features

161
4
4
Driving
Driving
.4-1. Before drivingDriving the vehicle ..................... 162
Cargo and luggage ................... 167
Vehicle load limits ...................... 170
Trailer towing (vehicles without towing package) ....................... 171
Trailer towing (vehicles with tow- ing package)............................... 171
Dinghy towing .............................. 181
4-2. Driving procedures Power (ignition) switch ............ 182
EV drive mode ............................ 187
Hybrid transmission .................. 189
Turn signal lever.......................... 192
Parking brake .............................. 193
Brake Hold.................................... 196
4-3. Operating the lights and wipers Headlight switch ......................... 198
AHB (Automatic High Beam) ......................................................... 201
Fog light switch .......................... 204
Windshield wipers and washer ........................................................ 204
Rear window wiper and washer ........................................................ 208
4-4. Refueling Opening the fuel tank cap..... 209
4-5. Using the driving support sys- tems
Lexus Safety System + 2.0 ..... 212PCS (Pre-Collision System)
........................................................ 218
LTA (Lane Tracing Assist) .... 225
RSA (Road Sign Assist).......... 234
Dynamic radar cruise control with full-speed range...................... 236
BSM (Blind Spot Monitor) .... 246
PKSA (Parking Support Alert) ....................................................... 250
Intuitive parking assist ............. 252
RCTA (Rear cross traffic alert) function....................................... 259
PKSB (Parking Support Brake) ....................................................... 265
Parking Support Brake function (static objects) ........................... 271
Parking Support Brake function (rear-crossing vehicles) ...... 274
Driving mode select switch .. 276
Driving assist systems.............. 278
4-6. Driving tips Hybrid vehicle driving tips .... 284
Winter driving tips .................... 286
Utility vehicle precautions..... 288

1824-2. Driving procedures
4-2.Driving procedures
1Check that the parking brake is set.
2 Check that the shift lever is in P.
3 Firmly depress the brake pedal.
and a message will be displayed on
the multi-information display.
If it is not displayed, the hybrid system can-
not be started.
4 Press the power switch shortly and
firmly.
When operating the power switch, one
short, firm press is enough. It is not neces-
sary to press and hold the switch.
If the “READY” indicator turns on, the
hybrid system will operate normally.
Continue depressing the brake pedal until
the “READY” indicator is illuminated.
The hybrid system can be started from any power switch mode.
5
Check that the “READY” indicator
is illuminated.
The vehicle will not move when the
“READY” indicator is off.
■Power switch illumination
According to the situation, the power
switch illumination operates as follows.
●When a door is opened, or the power
switch mode is changed from ACCES-
SORY or ON mode to off, the power
switch illumination slowly blinks.
●When depressing the brake pedal with
carrying the electronic key on your per-
son, the power switch illumination rapidly
blinks.
●When the power switch is in ACCES-
SORY or ON mode, the power switch
illumination illuminates.
■If the hybrid system does not start
●The immobilizer system may not have
been deactivated. ( P.73)
Contact your Lexus dealer.
●Check that the shift lever is securely set in
P. The hybrid system may not start if the
shift lever is displace d out of P. “To Start
Vehicle, Put Shift Leve r into P” will be dis-
played on the multi- information display.
●If the door is unlocked with the mechani-
cal key, the hybrid system cannot be
started using the sm art access system
Power (ignition) switch
Performing the following opera-
tions when carrying the electronic
key on your person starts the hybrid
system or changes power switch
modes.
Starting the hybrid system

1854-2. Driving procedures
4
Driving
Modes can be changed by pressing
the power switch with brake pedal released. (The mode changes each
time the switch is pressed.)
1
Off
*
The emergency flashers can be used.
2ACCESSORY mode
Some electrical components such as the
audio system can be used.
“ACCESSORY” will be displayed on the
meters.
3ON mode
All electrical components can be used.
“IGNITION ON” will be displayed on the
meters.
*: If the shift lever is in a position other than
P when turning off the hybrid system, the
power switch will be turned to ACCES-
SORY mode, not to off.
■Auto power off function
If the vehicle is left in ACCESSORY mode
for more than 20 minutes or ON mode
(with the hybrid system is not operating) for
more than an hour with the shift lever in P,
the power switch will automatically turn off.
WARNING
■Stopping the hybrid system in an
emergency
If you want to stop the hybrid system in an
emergency while driving the vehicle,
press and hold the power switch for more
than 2 seconds, or press it briefly 3 times
or more in succession. ( P.402)
However, do not touch the power switch
while driving except in an emergency.
Turning the hybrid system off while driv-
ing will not cause loss of steering or brak-
ing control, however, power assist to the
steering will be lost. This will make it
more difficult to st eer smoothly, so you
should pull over and stop the vehicle as
soon as it is safe to do so.
■When parking
Exhaust gases include harmful carbon
monoxide (CO), which is colorless and
odorless. Observe the following precau-
tions.
Failure to do so may cause exhaust gases
to enter the vehicle and may lead to an
accident caused by light-headedness, or
may lead to death or a serious health
hazard.
●If the vehicle is in a poorly ventilated
area or a closed area, such as a
garage, stop the hybrid system.
●Do not leave the vehicle with the
hybrid system operating for a long
time. If such a situation cannot be
avoided, park the vehicle in an open
space and ensure that exhaust fumes
do not enter the vehicle interior.
●Do not leave the hybrid system operat-
ing in an area with snow build-up, or
where it is snowing. If snowbanks build
up around the vehicle while the hybrid
system is operating, exhaust gases
may collect and enter the vehicle.
Changing power switch modes

1864-2. Driving procedures
However, this function cannot entirely pre-
vent 12-volt battery discharge. Do not leave
the vehicle with the power switch in
ACCESSORY or ON mode for long peri-
ods of time when the hybrid system is not
operating.
If the hybrid system is stopped with the
shift lever in a position other than P, the
power switch will not be turned off but
instead be turned to ACCESSORY
mode. Perform the following proce-
dure to turn the switch off:
1 Check that the parking brake is set.
2 Shift the shift lever to P.
3 Check that “Turn Off Vehicle” is
displayed on the multi-information
display and then press the power
switch once.
4 Check that “Turn Off Vehicle” on
the multi-information display is off.
NOTICE
■To prevent 12-vol t battery discharge
●Do not leave the power switch in
ACCESSORY or ON mode for long
periods of time with out the hybrid sys-
tem on.
●If “ACCESSORY” or “IGNITION
ON” is displayed on the meters while
the hybrid system is not operating, the
power switch is not off.
Exit the vehicle after turning the power
switch off.
When stopping the hybrid sys-
tem with the shift lever in a posi-
tion other than P
NOTICE
■To prevent 12-volt battery discharge
Do not stop the hybrid system when the
shift lever is in a posi tion other than P. If
the hybrid system is stopped in another
shift lever position, the power switch will
not be turned off but instead be turned to
ACCESSORY mode. If the vehicle is left
in ACCESSORY mode, 12-volt battery
discharge may occur.

2094-4. Refueling
4
Driving
4-4.Refueling
Close all the doors and windows,
and turn the power switch off.
 Confirm the type of fuel.
■Fuel types
P.461
■Fuel tank opening for unleaded gasoline
To help prevent incorrect fueling, your vehi-
cle has a fuel tank opening that only accom-
modates the special nozzle on unleaded
fuel pumps.
Opening the fuel tank cap
The fuel tank of your vehicle has a
special structure, which requires a
reduction in fuel tank pressure
before refueling. After the opener
switch has been pressed, it will take
several seconds until the vehicle is
ready for refueling.
Before refueling the vehicle
WARNING
■When refueling the vehicle
Observe the following precautions while
refueling the vehicle. Failure to do so may
result in death or serious injury.
●After exiting the ve hicle and before
opening the fuel door, touch an
unpainted metal surface to discharge
any static electricity. It is important to
discharge static electricity before
refueling because sparks resulting
from static electricity can cause fuel
vapors to ignite while refueling.
●Always hold the grips on the fuel tank
cap and turn it slowly to remove it.
A whooshing sound may be heard
when the fuel tank cap is loosened.
Wait until the sound cannot be heard
before fully removing the cap. In hot
weather, pressurized fuel may spray
out of the filler neck and cause injury.
●Do not allow anyone that has not dis-
charged static electricity from their
body to come close to an open fuel
tank.
●Do not inhale vaporized fuel.
Fuel contains substances that are
harmful if inhaled.
●Do not smoke while refueling the vehi-
cle.
Doing so may cause the fuel to ignite
and cause a fire.
●Do not return to the vehicle or touch
any person or object that is statically
charged.
This may cause static electricity to
build up, resulting in a possible ignition
hazard.
■When refueling
Observe the following precautions to
prevent fuel overflowing from the fuel
tank:
●Securely insert the fuel nozzle into the
fuel filler neck.
●Stop filling the tank after the fuel noz-
zle automatically clicks off.
●Do not top off the fuel tank.
NOTICE
■Refueling
●Finish refueling within 30 minutes. If
more than 30 minutes passes, the
internal valve closes. In this condition,
fuel may overflow during the refueling
process.
Press the fuel filler door opener switch
again.

3626-3. Do-it-yourself maintenance
Light bulbs
(P.392)
•Bulb with same num-
ber and wattage rat-
ing as original
•Flathead screw- driver
•Wrench
Radiator and con-
denser ( P.368)
Tire inflation pres-
sure ( P.380)• Tire pressure gauge
•Compressed air
source
Washer fluid
(P.369)
• Water or washer
fluid containing anti-
freeze (for winter
use)
• Funnel (used only for adding water or
washer fluid)
WARNING
The engine compartment contains many
mechanisms and fluids that may move
suddenly, become hot, or become elec-
trically energized. To avoid death or seri-
ous injury, observe the following
precautions.
■When working on the engine com-
partment
●Make sure that the “ACCESSORY” or
“IGNITION ON” on the multi-infor-
mation display and the “READY” indi-
cator are both off.
●Keep hands, clothi ng and tools away
from the moving fan and engine drive
belt.
●Be careful not to touch the engine,
power control unit, radiator, exhaust
manifold, etc. right after driving as they
may be hot. Oil and other fluids may
also be hot.
ItemsParts and tools●Do not leave anything that may burn
easily, such as paper and rags, in the
engine compartment.
●Do not smoke, cause sparks or expose
an open flame to fuel. Fuel fumes are
flammable.
■When working near the electric cool-
ing fan or radiator grille
Be sure the power switch is off.
With the power switch in ON mode, the
electric cooling fans may automatically
start to run if the air conditioning is on
and/or the coolant temperature is high.
(  P.368)
■Safety glasses
Wear safety glasses to prevent flying or
falling material, fluid spray, etc. from get-
ting in your eyes.
NOTICE
■If you remove the air cleaner filter
Driving with the air cleaner filter
removed may cause excessive engine
wear due to dirt in the air.

4568-1. Specifications
*: The coolant capacity is a reference quantity.
If replacement is necessary, contact your Lexus dealer.
Cooling system
Capacity*
Gasoline
engine
RX450h (Vehicles without towing package)
10.3 qt. (9.8 L, 8.6 Imp. qt.)
RX450h (Vehicles with towing package)
10.7 qt. (10.1 L, 8.9 Imp. qt.)
RX450hL
13.2 qt. (12.5 L, 11 Imp. qt.)
Power con-
trol unit2.0 qt. (1.9 L, 1.7 Imp. qt.)
Coolant type
Use either of the following:
 “Toyota Super Long Life Coolant”
 Similar high-quality ethylene glycol-based non-silicate,
non-amine, non-nitrite, and non-borate coolant with
long-life hybrid orga nic acid technology
Do not use plain water alone.
Ignition system (spark plug)
MakeDENSO FK20HBR8
Gap0.03 in. (0.8 mm)
NOTICE
■Iridium-tipped spark plugs
Use only iridium-tipped spark plugs. Do not adjust the spark plug gap.

508Alphabetical Index
If the fuel filler door cannot be opened.........................................................................438
If the hybrid system will not start ........ 436
If the vehicle is submerged or water on the road is rising......................................403
If you have a flat tire .................................. 424
If you lose your keys.................................438
If you think something is wrong .........409
If your vehicle becomes stuck............. 449
If your vehicle has to be stopped in an
emergency ................................................ 402
If your vehicle needs to be towed .....405
If your vehicle overheats ........................ 446
Energy monitor .....................................99, 100
Engine ACCESSORY mode .............................. 185
Compartment .............................................365
Engine switch.................................................182
Hood................................................................ 363
How to start the hybrid system ............182
Identification number ............................... 453
If the hybrid system will not start ........ 436
If your vehicle has to be stopped in an
emergency ................................................ 402
Ignition switch (power switch) ..............182
Overheating................................................. 446
Power switch .................................................182
Tachometer ..................................................... 83
Engine coolant Capacity .........................................................456
Checking ....................................................... 367
Preparing and checking before winter.........................................................................286
Engine coolant temperature gauge ....... 83
Engine oil Capacity .........................................................455
Checking .......................................................365
Preparing and checking before winter.........................................................................286
Warning light ...................................................411
Engine oil maintenance data .................. 367 Engine switch (power switch) ..................182
If your vehicle has to be stopped in an emergency .................................................402
EPS (Electric Power Steering) .............. 279 Warning light .................................................413
EV drive mode................................................187
EV indicator .......................................................67
Event data recorder (EDR) ........................... 8
F
Flat tire Tire pressure warning system ............. 376
Vehicles with a spare tire....................... 424
Floor mats .......................................................... 24
Fluid Brake ................................................................ 457
Hybrid transmission.................................. 457
Washer .......................................................... 369
Fog lights Switch...............................................................204
Footwell light ...................................................315
Front automatic air conditioning system .......................................................................... 298
Front fog lights Replacing light bulbs................................393
Front passenger footwell hooks ............ 340
Front passenger occupant classification system .............................................................. 39
Front seats Adjustment ......................................................129
Cleaning .........................................................353
Correct driving posture ............................ 25
Driving position memory ........................ 140
Head restraints..............................................143
Memory recall function.............................. 141
Power easy access system .................... 140
Seat heaters ....................................................312
Seat position memory .............................. 140
Seat ventilators ..............................................312
Front side marker light Light switch .................................................... 198
Replacing light bulbs................................393

510Alphabetical Index
High voltage components ....................... 69
Hybrid system precautions ..................... 69
If the hybrid system will not start ........ 436
Overheating.................................................448
Power (ignition) switch.............................182
Regenerative braking ................................. 67
Starting the hybrid system.......................182
Hybrid System Indicator......................85, 99
Hybrid transmission..................................... 189 M mode ............................................................. 191
Paddle shift switches .........................190, 191
Hybrid vehicle driving tips ....................... 284
I
I/M test ............................................................ 360
Identification Engine ............................................................. 453
Vehicle ............................................................ 452
If your vehicle has to be stopped in an
emergency .................................................. 402
Ignition switch (power switch) .................182 Auto power off function .......................... 185
Changing the power switch modes . 185
If your vehicle has to be stopped in an
emergency ................................................ 402
Immobilizer system......... ................................73
Indicators ........................................................... 80
Initialization Items to initialize .........................................485
Maintenance ....................................356, 367
Power windows............................................. 151
Tire pressure warning system ............. 378
Inside rear view mirror ................................ 147
Instrument panel light control ................... 87
Interior lights....................................................315 Front interior light ........................................315
Rear interior light .........................................315
Intuitive parking assist.....................250, 252 Function .......................................................... 252
Warning message..................................... 254
J
JackPositioning a floor jack ............................363
Vehicle-equipped jack ...........................425
Jack handle .................................................... 425
Jam protection function Electronic sunshade ...................................157
Moon roof ...................................................... 154
Panoramic moon roof ...............................157
Power back door.......................................... 119
Power windows ............................................. 151
Rear seats ....................................................... 130
K
Keyless entrySmart access system with push-button start ................................................................. 125
Wireless remote control ......................... 107
Keys Battery-saving function.............................126
Electronic key ............................................... 106
If the electronic key does not operate properly .......................................................439
If you lose your keys ................................ 438
Key number plate ....................................... 106
Keyless entry ....................................... 107, 125
Mechanical key ............................................ 106
Power switch................................................. 182
Replacing the battery .............................. 386
Warning buzzer .......................................... 125
Wireless remote control ......................... 107
Knee airbags .................................................... 30
L
Lane Tracing Assist (LTA) Operation ...................................................... 225
Warning messages................................... 233
Language (multi-infor mation display) ... 92
LATCH anchors ............................................. 54