steering wheel LEXUS RX450h 2021 Repair Manual

4668-1. Specifications
*: Minimum pedal clearance when depressed with a force of 110 lbf (490 N, 50 kgf) while
the hybrid system is operating.
Type A
Brake pad wear limit0.04 in. (1.0 mm)
Fluid typeFMVSS No. 116 DOT 3 or SAE J1703
FMVSS No. 116 DOT 4 or SAE J1704
Steering
Free playLess than 1.2 in. (30 mm)
Tires and wheels
Tire size235/65R18 106V, T165/90D18 107M (spare)
Tire inflation pressure
(Recommended cold tire
inflation pressure)
Front tire
33 psi (230 kPa, 2.3 kgf/cm
2 or bar)
Rear tire
33 psi (230 kPa, 2.3 kgf/cm
2 or bar)
Spare tire
60 psi (420 kPa, 4.2 kgf/cm
2 or bar)
Driving at high speeds (above 100 mph [160 km/h]) (in
countries where such speeds are permitted by law)
Add 5 psi (30 kPa, 0.3 kgf/cm
2 or bar) to the front and rear
tires. Never exceed the maximum cold tire inflation pres-
sure indicated on the tire sidewall.
Wheel size18  8J, 18  4T (spare)
Wheel nut torque76 ft•lbf (103 N•m, 10.5 kgf•m)

4868-2. Customization
■Steering wheel (P.148)
■Outside rear view mirrors ( P.150)
*:If equipped
■Power windows, and moon roof* or panoramic moon roof* ( P.153, 155, 158)
*:If equipped
■Moon roof* ( P.155)
*:If equipped
FunctionDefault settingCustomized setting
Auto tilt away functionOnOff——O
FunctionDefault settingCustomized setting
Automatic mirror folding and
extending operation
*
Linked to the lock-
ing/unlocking of the doorsOff
——OLinked to operation of the power switch
FunctionDefault settingCustomized setting
Mechanical key linked opera-
tionOffOn——O
Wireless remote control linked
operationOffOn (open only)——O
Wireless remote control linked
operation signal (buzzer)OnOff——O
FunctionDefault settingCustomized setting
Linked operation of compo-
nents when mechanical key is
used (open only)
Slide onlyTilt only——O
Linked operation of compo-
nents when wireless remote
control is used
Slide onlyTilt only——O
ABC
ABC
ABC
ABC

4888-2. Customization
■PCS (Pre-Collision System) (P.220)
■LTA (Lane Tracing Assist) ( P.227)
■RSA (Road Sign Assist)* ( P.236)
*:If equipped
FunctionDefault settingCustomized setting
PCS (Pre-Collision System)OnOff—O—
Adjust alert timingMiddleEarly—O—Late
FunctionDefault settingCustomized setting
Lane centering functionOnOff—O—
Steering assist functionOnOff—O—
Alert typeSteering wheel
vibrationBuzzer—O—
Alert sensitivityHighStandard—O—
Vehicle sway warning functionOnOff—O—
Vehicle sway warning sensitiv-
ityStandardHigh—O—Low
FunctionDefault settingCustomized setting
RSA (Road Sign Assist)OnOff—O—
Excess speed notification
methodDisplay onlyNo notification—O—Display and buzzer
Excess speed notification level1 mph (2 km/h)3 mph (5 km/h)—O—5 mph (10 km/h)
Other notifications method
(No-entry notification)Display onlyNo notification—O—Display and buzzer
ABC
ABC
ABC

510What to do if... (Troubleshooting)
1-1.What to do if... (Troubleshooting)What to do if... (Troubleshooting)
If you lose your mechanical keys,
new genuine mechanical keys can
be made by your Lexus dealer.
( P.446)
 If you lose your electronic keys, the
risk of vehicle theft increases signifi-
cantly. Contact your Lexus dealer
immediately. ( P.446)
 Is the electronic key battery weak or
depleted? ( P.393)
 Is the power switch in ON mode?
When locking the doors, turn the power
switch off. ( P.187)
 Is the electronic key left inside the
vehicle?
When locking the doors, make sure that
you have the electronic key on your per-
son.
The function may not operate prop- erly due to the condition of the radio
wave. (
P.126)
 Is the child-protector lock set?
The rear door cannot be opened from
inside the vehicle when the lock is set.
Open the rear door from outside and then
unlock the child-protector lock. ( P.112)
 Did you press the power switch
while firmly depressing the brake
pedal? ( P.184)
 Is the shift lever in P? ( P.184)
 Is the electronic key anywhere
detectable inside the vehicle?
( P.125)
 Is the steering wheel unlocked?
( P.185)
 Is the electronic key battery weak or
depleted?
In this case, the hy brid system can be
started in a temporary way. ( P.448)
 Is the 12-volt battery discharged?
( P.449)
 Is the power switch in ON mode?
If you have a problem, check the
following before contacting your
Lexus dealer.
The doors cannot be locked,
unlocked, opened or closed
You lose your keys
The electronic key does not
operate properly
The doors cannot be locked or
unlocked
The rear door cannot be opened
If you think something is wrong
The hybrid system does not start
The shift lever cannot be shifted
from P even if you depress the
brake pedal

511What to do if... (Troubleshooting)
If you cannot release the shift lever by
depressing the brake pedal with the power
switch in ON mode (P.192)
It is locked automatically to prevent
theft of the vehicle. ( P.185)
 Is the window lock switch pressed?
The power window except for the one at
the driver’s seat cannot be operated if the
window lock switch is pressed. ( P.155)
 The auto power off function will be
operated if the vehicle is left in
ACCESSORY or ON mode (the
hybrid system is not operating) for a
period of time. ( P.187)
 The seat belt reminder light is flash-
ing
Are the driver and the passengers wearing
the seat belts? ( P.421)
 The parking brake indicator is on
Is the parking brake released? ( P.195)
Depending on the situation, other
types of warning buzzer may also
sound. ( P.418, 428) 
Did anyone inside the vehicle open
a door during setting the alarm?
The sensor detects it and the alarm sounds.
( P.75)
Do one of the following to stop the
alarms:
 Unlock the doors.
 Turn the power switch to ACCES-
SORY or ON mode, or start the
hybrid system.
 Is the message displayed on the
multi-information display?
Check the message on the multi-informa-
tion display. ( P.428)
 When a warning light turns on or a
warning message is displayed, refer
to P.418, 428.
 Stop the vehicle in a safe place and
replace the flat tire with the spare
tire. ( P.432)
The steering wheel cannot be
turned after the hybrid system is
stopped
The windows do not open or
close by operating the power
window switches
The power switch is turned off
automatically
A warning buzzer sounds during
driving
An alarm is activated and the
horn sounds
A warning buzzer sounds when
leaving the vehicle
A warning light turns on or a
warning message is displayed
When a problem has occurred
If you have a flat tire

514Alphabetical Index
BrakeBrake hold...................................................... 198
Fluid ......................................................375, 465
Parking brake ............................................... 195
Regenerative braking ................................. 67
Warning light ................................................ 418
Brake assist .................................................... 283
Break-in tips.....................................................165
Brightness control Instrument panel light control ................ 87
BSM (Blind Spot Monitor)........................247
Buzzer Hands off steering wheel warning (LTA)......................................................................... 234
C
Care Exterior ...........................................................356
Interior .............................................................359
Seat belts........................................................359
Wheels and wheel ornaments............356
Cargo capacity..................................... 169, 172
Cargo hooks ................................................. 329
Cargo net hooks .......................................... 329
Center Display .............................................300
Chains .............................................................. 292
Child restraint system Fixed with a LATCH system .................. 54
Fixed with a seat belt...................................50
Front passenger occupant classification system ............................................................. 39
Points to remember .................................... 45
Riding with children ..................................... 45
Types of child restraint system installation method ........................................................... 46
Using an anchor bracket .......................... 57
Child safety 12-volt battery precautions .......378, 453
Airbag precautions...................................... 36
Child restraint system................................. 46
Heated steering wheel and seat heater precautions................................................. 318 How your child should wear the seat belt
............................................................................. 27
Moon roof precautions.............................157
Panoramic moon roof precautions ... 160
Power back door precautions ............... 113
Power window lock switch .................... 155
Power window precautions .................. 154
Rear door child-protectors ..................... 112
Seat belt extender precautions.............. 27
Seat belt precautions .................................. 45
Child-protectors............................................. 112
Cleaning Exterior........................................................... 356
Interior ............................................................ 359
Radar sensor ..................................................214
Seat belts ....................................................... 359
Wheels and wheel ornaments ........... 356
Clock ........................................................83, 343
Coat hooks..................................................... 343
Coin box.......................................................... 328
Compass ......................................................... 352
Condenser ..................................................... 374
Console box .................................................. 326
Cooling system............................................. 373 Engine overheating...................................454
Hybrid system overheating ................. 456
Cornering lights ........................................... 202 Replacing light bulbs ............................... 400
Cruise control Dynamic radar cruise control with full-speed range ......................................238
Cup holders ................................................... 327
Current fuel consumption .......................... 90
Curtain shield airbags .................................. 30
Customizable features ..............................480
D
Daytime running light system .................200
Defogger Outside rear view mirrors.................... 306
Rear window ............................................... 306
Windshield ................................................... 306

517Alphabetical Index
Front side marker lightsReplacing light bulbs............................... 400
Wattage..........................................................468
Front turn signal lights Replacing light bulbs................... 400, 402
Turn signal lever ...........................................194
Wattage..........................................................468
Fuel Capacity ......................................................... 462
Fuel gauge ....................................................... 83
Information .................................................... 469
Refueling ............................................................211
Type.................................................................. 462
Warning light ................................................. 421
Fuel consumption Average fuel economy .............................. 90
Current fuel consumption........................ 90
Fuel filler door If the fuel filler door cannot be opened......................................................................... 446
Refueling ............................................................211
Fuel gauge ......................................................... 83
Fuses ................................................................. 395
G
Garage door opener ................................. 346
Gauges ............................................................... 83
G-force................................................................. 91
Glove box ....................................................... 326
Glove box light ............................................. 326
Grocery bag hooks .................................... 330
H
Hands Free Power Back Door ................. 116
Head restraints ...............................................145
Headlight aim ................................................ 397
Headlights Adaptive Front-lighting System (AFS)......................................................................... 202
Automatic High Beam system............ 203
Light switch ...................................................200 Replacing light bulbs ............................... 400
Head-up display.............................................. 95 Driving information display area ...........95
HUD (Head-up display) switch ............ 96
Hybrid System Indicator ........................... 99
Navigation system-linked display ........98
Settings............................................................... 97
Heated steering wheel ............................... 318
Heaters Front automatic air conditioning system......................................................................... 304
Heated steering wheel ............................. 318
Outside rear view mirrors.................... 306
Rear automatic air conditioning system
........................................................................... 315
Seat heaters ................................................... 318
High mounted stoplight Replacing light bulbs ............................... 400
High-voltage components ......................... 69
Hill-start assist control ............................... 284
Hood Open............................................................... 369
Hooks Cargo hooks................................................329
Cargo net hooks ........................................329
Coat hooks ...................................................343
Front passenger footwell hooks.........345
Grocery bag hooks................................. 330
Retaining hooks (floor mat) ..................... 24
Horn ................................................................... 148
HUD (Head-up display) switch ................ 96
Hybrid battery (traction battery) Location ............................................................. 69
Specification ................................................. 462
Warning message ........................................ 72
Hybrid battery (traction battery) air vents ............................................................................... 71
Hybrid system .................................................. 66 Acoustic Vehicle Alerting System .......68
Emergency shut off system...................... 72
Energy monitor/consumption screen99
EV drive mode............................................. 189

522Alphabetical Index
Cleaning and maintaining the seat belt.........................................................................359
Emergency Locking Retractor .............. 28
How to wear your seat belt ......................27
How your child should wear the seat belt .............................................................................27
Pregnant women, proper seat belt use ............................................................................ 26
Reminder light and buzzer ......... 421, 422
Seat belt extender .........................................27
Seat belt pretensioners .............................. 29
SRS warning light ...................................... 420
Seat heaters .................................................... 318
Seat position memory.................................. 142
Seat ventilators .............................................. 318
Seating capacity............................................. 172
Seats Adjustment............................................. 131, 133
Adjustment precautions .................. 131, 132
Child seats/child restraint system installa-tion .................................................................... 45
Cleaning.........................................................359
Driving position memory......................... 142
Folding down the rear seatbacks........133
Head restraints .............................................145
Power easy access system ..................... 142
Properly sitting in the seat ........................ 25
Seat heaters ................................................... 318
Seat position memory ............................... 142
Seat ventilators............................................. 318
Sensor Automatic headlight system.................200
Automatic High Beam system............ 203
Inside rear view mirror..............................149
Intuitive parking assist.............................. 255
LTA (Lane Tracing Assist).....................227
Parking Support Brake function (rear-crossing vehicles).......................277
Parking Support Brake function (static objects).........................................................272
Radar sensor...................................... 214, 249
Rain-sensing windshield wipers......... 207 RCTA............................................................... 262
Service plug ...................................................... 69
Service reminder message ..................... 362
Shift lever Hybrid transmission..................................... 191
Shift lever light ................................................321
Side airbags ...................................................... 30
Side doors........................................................ 109
Side marker lights Light switch .................................................. 200
Replacing light bulbs ............................... 400
Side mirrors Adjustment ..................................................... 150
BSM (Blind Sport Monitor).................. 247
Folding................................................................ 151
Linked mirror functi on when reversing
........................................................................... 150
Mirror position memory ...........................142
RCTA function ..............................................261
Side turn signal lights Replacing light bulbs ............................... 400
Turn signal lever .......................................... 194
Side windows ..................................................153
Smart access system with push-button startAntenna location ......................................... 125
Entry functions ..................................... 109, 114
Starting the hybrid system ...................... 184
Smartphone holder..................................... 326
Snow tires .........................................................291
Spare tire......................................................... 432 Storage location .........................................433
Spark plug ...................................................... 464
Specifications ................................................ 460
Speedometer ................................................... 83
Steering lock Column lock release ................................. 185
Steering lock system warning message........................................................................... 185
Steering wheel Adjustment ..................................................... 148
Heated steering wheel ............................. 318

523Alphabetical Index
Meter control switches .............................. 89
Power easy access system ..................... 142
Steering wheel position memory ........ 142
Stop lights Replacing light bulbs............................... 400
Storage features .......................................... 324
Stuck If the vehicle becomes stuck................ 457
Suggestion function....................................... 93
Sun visors ........................................................ 344
Sunshade Panoramic moon roof.............................. 158
Roof ................................................................... 156
Switches Automatic High Beam switch ............. 203
Brake Hold switch ..................................... 198
Door lock switches ........................................ 111
Driving mode select switch ....................281
Driving position memory switches ..... 142
Dynamic radar cruise control with full-speed range switch ....................... 238
Electronic sunshade switch ................... 158
Emergency flashers switch .................... 410
EV drive mode switch ............................. 189
Fog light switch ...........................................206
Garage door opener switches .......... 346
Heated steering wheel switch.............. 318
HUD (Head-up display) switch............ 96
Ignition switch............................................... 184
Instrument panel light control switches ............................................................................ 87
Intuitive parking assist switch............... 256
Light switches ..............................................200
LTA (Lane Tracing Assist) switch....... 231
Meter control switches .............................. 89
Moon roof switches .................................. 155
“ODO TRIP” switch .................................... 87
Outside rear view mirror switches .... 150
Paddle shift switches ....................... 192, 193
Panoramic moon roof switches .......... 158
Parking brake switch ................................ 195
PCS OFF switch .........................................222 PKSB (Parking Support Brake) switch
..........................................................................266
Power switch................................................. 184
Power window switches ......................... 153
RCTA switch ..................................................261
Rear window and outside rear view mir- ror defoggers switch ........................... 304
Seat heater switches.................................. 318
Seat ventilator switches ........................... 318
“SOS” button...................................................60
Tilt and telescopic steering control switch ........................................................................... 148
Tire pressure warning reset switch.. 385
Vehicle-to-vehicle distance switch...238
VSC OFF switch ...................................... 285
Window lock switch.................................. 155
Windshield wiper and washer switch ......................................................................... 206
Windshield wiper de-icer switch...... 309
T
Tachometer....................................................... 83 Rev indicator ...................................................85
Rev peak............................................................85
Tail lights Light switch .................................................. 200
Replacing light bulbs ............................... 400
The Secondary Collision Brake ............ 284
Theft deterrent system Alarm................................................................... 75
Immobilizer system ...................................... 73
Tire inflation pressure Maintenance data ......................................466
Tire inflation pressure display function..........................................................................382
Warning light ............................................... 422
Tire information .............................................. 471 Glossary ......................................................... 475
Size .................................................................... 473
Tire identification number...................... 472
Uniform Tire Quality Grading ............ 473
Tire pressure display ... ............................... 382

524Alphabetical Index
Tire pressure warning systemFunction .......................................................... 382
Initializing ...................................................... 385
Installing tire pressure warning valves and transmitters ......................................384
Registering ID codes ............................... 387
Warning light ............................................... 422
Tires Chains ............................................................. 292
Checking ...................................................... 380
If you have a flat tire .................................. 432
Inflation pressure........................................ 387
Information ...................................................... 471
Replacing ....................................................... 432
Rotating tires ................................................ 382
Size.................................................................... 466
Snow tires ........................................................ 291
Spare tire........................................................ 432
Tire inflation pressu re display function
......................................................................... 382
Tire pressure warning system ............. 382
Warning light ............................................... 422
Tools.................................................................. 433
Top tether strap................................................57
Total load capacity ...................................... 460
Towing Dinghy towing .............................................. 183
Emergency towing ..................................... 413
Towing eyelet ................................................415
Trailer towing ................................................. 173
TRAC (Traction Control) ........................ 284
Traction battery (hybrid battery) Hybrid battery (traction battery) air vents.............................................................................. 71
Location............................................................. 69
Specification ................................................. 462
Warning message.........................................72
Traction Control (TRAC) ........................ 284
Traction motor (electric motor) ............... 66
Trailer Sway Control.................................. 284
Trailer towing .................................................. 173 Transmission
Driving mode select switch ................... 281
Hybrid transmission..................................... 191
M mode ........................................................... 193
Paddle shift switches ....................... 192, 193
Trip meters ........................................................ 87
Turn signal lights Replacing light bulbs ............................... 400
Turn signal lever .......................................... 194
Wattage ......................................................... 468
U
USB charging ports.................................... 334
V
Vanity lights.................................................... 345Wattage ......................................................... 468
Vanity mirrors ............................................... 345
VDIM (Vehicle Dynamics Integrated Man- agement)...................................................... 284
Vehicle data recording ....................................7
Vehicle Dynamics Integrated Manage- ment (VDIM).............................................. 284
Vehicle identification number ................ 460
Vehicle Stability Control (VSC) ........... 283
Ventilators (seat ventilators).................... 318
VSC (Vehicle Stability Control) ........... 283
W
Warning buzzers Approach warning.................................... 244
Brake Override System .........................420
Door lock .......................................................... 110
Downshifting ................................................. 193
Drive-Start Control...................................420
Electric power steering.............................421
Hands off steering wheel warning (LTA).......................................................................... 234
High coolant temperature...................... 418
Hybrid system overheat .......................... 419