check engine light LEXUS RX450h 2022 User Guide

3696-3. Do-it-yourself maintenance
6
Maintenance and care
■Checking fluid level
The brake fluid level should be
between the “MAX” and “MIN” lines
on the tank.
■Adding fluid
Make sure to check the fluid type and
prepare the necessary item.
 Fluid type
FMVSS No.116 DOT 3 or SAE J1703
brake fluid
Item
Clean funnel
■Brake fluid can absorb moisture from
the air
Excess moisture in the brake fluid can cause
a dangerous loss of br aking efficiency. Use
only newly opened brake fluid.
If any washer does not work or the
warning message appears on the
multi-information display, the washer
tank may be empty. Add washer fluid.
WARNING
■When the hybrid system is hot
Do not touch the radiator or condenser
as they may be hot and cause serious
injuries, such as burns.
Checking and adding the brake
fluid
WARNING
■When filling the reservoir
Take care as brake fluid can harm your
hands and eyes and damage painted sur-
faces.
If fluid gets on your hands or in your eyes,
flush the affected area with clean water
immediately.
If you still experience discomfort, see a
doctor.
NOTICE
■If the fluid level is low or high
It is normal for the brake fluid level to go
down slightly as the brake pads wear out
or when the fluid level in the accumulator
is high.
If the reservoir need s frequent refilling,
there may be a serious problem.
Washer fluid
WARNING
■When adding washer fluid
Do not add washer fluid when the hybrid
system is hot or operating as washer fluid
contains alcohol and may catch fire if
spilled on the engine, etc.

4347-2. Steps to take in an emergency
7Confirm it is not loose after tighten-
ing:
1 Push and pull the tire
2 Try rotating
Visually check to ensure tire is not hung on
surrounding parts.
If looseness or misassembly exists, repeat
steps 2 to 7.
8 Repeat step 7, any time the tire is
lowered or disturbed.
9 Stow the jack and all tools.
■The compact spare tire
●The compact spare tire is identified by the
label “TEMPORARY USE ONLY” on
the tire sidewall. Use the compact spare
tire temporarily, and only in an emer-
gency.
●Make sure to check the tire inflation pres-
sure of the compact spare tire. ( P.458)
■When using the compact spare tire
As the compact spare tire is not equipped
with a tire pressure warning valve and trans-
mitter, low inflation pressure of the spare
tire will not be indicated by the tire pressure
warning system. Also, if you replace the
compact spare tire after the tire pressure
warning light comes on, the light remains
on.
■When the compact spare tire is
equipped
When driving with the compact spare tire
installed, the vehicle he ight will be different
than when driving with standard tires.
■If you have a flat front tire on a road cov-
ered with snow or ice
Install the compact spare tire on one of the
rear wheels of the ve hicle. Perform the fol-
lowing steps and fit tire chains to the front
tires:
1 Replace a rear tire with the compact
spare tire.
2 Replace the flat front tire with the tire
removed from the rear of the vehicle.
3 Fit tire chains to the front tires.
WARNING
■When using the compact spare tire
●Remember that the compact spare tire
provided is specific ally designed for
use with your vehicle. Do not use your
compact 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:
• ABS & Brake assist
•VSC
•TRAC
• Trailer Sway Control
•EPS
•VDIM
• Adaptive Variable Suspension System (if equipped)
• Dynamic radar cruise control with full-speed range

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

513Alphabetical Index
Checking ....................................................... 367
Preparing and checking before winter.........................................................................286
Power easy access system ....................... 140
Power outlets ................................................ 338
Power steering (Elect ric power steering
system).......................................................... 279 Warning light .................................................413
Power switch ...................................................182 Auto power off function .......................... 185
Changing the power switch modes . 185
Power switch (engine switch) If your vehicle has to be stopped in an
emergency ................................................ 402
Power windows Door lock linked window operation..152
Jam protection function............................. 151
Operation......................................................... 151
Window lock switch ..................................153
Pre-Collision System (PCS) Function ............................................................218
PCS OFF switch ........................................ 220
Warning light .................................................416
R
Radar cruise control (dynamic radar cruise control with full-speed range)............. 236
Radiator ........................................................... 368
RCTA Function .......................................................... 259
Warning message.....................................260
RCTA (Rear Cross Traffic Alert) ......... 250
RCTA function ............................................. 260
Rear automatic air conditioning system .......................................................................... 309
Rear Cross Traffic Alert (RCTA) ......... 259
Rear door sunshades ................................. 340
Rear fog lights Switch .............................................................. 204
Rear seats ........................................................ 130 Adjustment....................................................... 131
Folding down the rear seatbacks......... 131 Head restraints..............................................143
Seat heaters ....................................................312
Rear side marker lights Light switch .................................................... 198
Replacing light bulbs................................393
Rear turn signal lights Replacing light bulbs....................393, 397
Turn signal lever ...........................................192
Wattage ......................................................... 460
Rear view mirror Inside rear view mirror ..............................147
Outside rear view mirrors...................... 148
Rear window defogger .............................300
Rear window wiper.....................................208
Refueling Capacity .........................................................454
Fuel types .......................................................454
If the fuel filler do or cannot be opened
......................................................................... 438
Opening the fuel tank cap ................... 209
Regenerative braking ....................................67
Remote Touch .............................................. 292
Replacing Electronic key battery ............................. 386
Fuses................................................................ 388
Light bulbs ..................................................... 392
Tires .................................................................. 424
Resetting the message indicating mainte- nance is required ...................................... 356
Rev indicator .................................................... 85
Rev peak............................................................. 85
Road Sign Assist .............. ............................ 234
RSA (Road Sign Assist) ............................ 234
S
Seat belt reminder light.....................413, 414
Seat belts............................................................ 26 Automatic Locking Retractor................. 28
Child restraint system installation ......... 46
Cleaning and maintaining the seat belt..........................................................................353
Emergency Locking Retractor .............. 28

516Alphabetical Index
Installing tire pressure warning valves and transmitters .......................................377
Registering ID codes ............................... 379
Warning light ................................................. 414
Tires Chains ............................................................. 287
Checking ....................................................... 374
If you have a flat tire .................................. 424
Inflation pressure....................................... 380
Information .................................................... 463
Replacing ....................................................... 424
Rotating tires ................................................ 376
Size....................................................................458
Snow tires ......................................................286
Spare tire........................................................ 424
Tire inflation pressure display function......................................................................... 376
Tire pressure warning system ............. 376
Warning light ................................................. 414
Tools.................................................................. 425
Top tether strap................................................57
Total load capacity ...................................... 452
Towing Dinghy towing ................................................ 181
Emergency towing ...................................405
Towing eyelet .............................................. 407
Trailer towing ...................................................171
TRAC (Traction Control) ........................ 279
Traction battery (hybrid battery) Hybrid battery (traction battery) air vents.............................................................................. 71
Location............................................................. 69
Specification ................................................. 454
Warning message......................................... 72
Traction Control (TRAC) ........................ 279
Traction motor (electric motor) ............... 66
Trailer Sway Control.................................. 279
Trailer towing ................................................... 171
Transmission Driving mode select switch .................. 276
Hybrid transmission .................................. 189
M mode ............................................................. 191 Paddle shift switches ........................ 190, 191
Trip meters ........................................................ 87
Turn signal lights Replacing light bulbs................................393
Turn signal lever ...........................................192
Wattage ......................................................... 460
U
USB charging ports.................................... 329
V
Vanity lights.................................................... 340Wattage ......................................................... 460
Vanity mirrors ............................................... 340
VDIM (Vehicle Dynamics Integrated Man- agement)...................................................... 279
Vehicle data recording ....................................7
Vehicle Dynamics Integrated Manage- ment (VDIM).............................................. 279
Vehicle identification number ................ 452
Vehicle Stability Control (VSC) ........... 278
Ventilators (seat ventilators).....................312
VSC (Vehicle Stability Control) ........... 278
W
Warning buzzers
Approach warning.................................... 242
Brake Override System ...........................412
Door lock .......................................................... 110
Downshifting ................................................... 191
Drive-Start Control.....................................412
Electric power steering.............................413
Hands off steering wheel warning (LTA).......................................................................... 232
High coolant temperature...................... 410
Hybrid system overheat ............................ 411
Intuitive parking assist ................... 258, 415
Low engine oil pressure ............................ 411
LTA (Lane Tracing Assist)225, 228, 414
Open door ....................................................... 112

517Alphabetical Index
Open window ............................................... 152
PKSA (Parking Support Alert) ...........250
PKSB (Parking Support Brake) ...........415
Pre-collision braking.................................. 219
RCTA (Rear Cross Traffic Alert) ........415
Seat belt ................................................. 413, 414
Warning label .................................................. 69
Warning lights................................................ 410 ABS .................................................................... 412
Brake hold operated indicator ............. 417
Brake Override System ........................... 412
Brake system ................................................ 410
Charging system ...........................................411
Drive-Start Control .................................... 412
Electric power steering ............................413
High coolant temperature ..................... 410
Hybrid system overheat warning light411
Intuitive parking assist OFF indicator 415
Low engine oil pressure.............................411
Low fuel level .................................................413
LTA indicator ................................................. 414
Malfunction indicator lamp.......................411
Master warning light .................................. 417
Parking brake indicator ............................416
PKSB OFF indicator ..................................415
Pre-collision system ...................................416
RCTA OFF indicator.................................415
Seat belt reminder light ................. 413, 414
Slip indicator ..................................................416
SRS...................................................................... 412
Tire pressure .................................................. 414
Warning messages ..................................... 420
Washer Adding ............................................................ 369
Preparing and checking before winter.........................................................................286
Switch .............................................................. 204
Washing and waxing..................................350
Weight Cargo capacity.................................. 167, 170
Load limits .......................................................170
Weight ............................................................ 452 Wheels ............................................................. 382
Size ................................................................... 458
Window lock switch .....................................153
Windows Power windows ............................................. 151
Rear window defogger.......................... 300
Washer ...........................................................204
Windshield wiper de-icer ........................ 305
Windshield wiper inserts ..........................385
Windshield wipers Position........................................................... 206
Rain-sensing windshield wipers .........204
Replacing a windshield wiper insert 385
Winter driving tips....................................... 286
Wireless charger ......................................... 330
Wireless remote control Battery-Saving Function...........................126
Locking/Unlocking ................................... 107
Replacing the battery .............................. 386
For information regarding the equipment listed below, refer to
the “NAVIGATION AND MULTI-
MEDIA SYSTEM OWNER’S
MANUAL”.
· Navigation system
· Audio/visual system
· Panoramic view monitor
· Lexus parking assist monitor