2021 LEXUS RCF engine overheat

2225-2. Using the air conditioning system
light as follows:
Hi (3 segments lit) Mid (2 segments
lit)  Lo (1 segment lit) Off
■Operation condition
The engine switch is in IGNITION ON
mode.
■Seat heater timer control
To enable seat heater timer control, press
and hold the driver and front passenger
seat heater switches at the same time when
the vehicle is stopped until a buzzer sounds
once. If a seat heater is turned on while seat
heater timer control is enabled, the intensity
of the seat heater wi ll automatically change
from Hi Mid Lo.
The timing of the change in seat heater
intensity differs depending on the tempera-
ture inside the cabin, etc. when the seat
heater is operating.
To disable seat heater timer control, press
and hold the driver and front passenger
seat heater switches at the same time until a
buzzer sounds twice.
Each time the switch is pressed, the
intensity of the seat ventilator changes
and the level indicator lights (green)
light as follows:
Hi (3 segments lit) Mid (2 segments
lit)  Lo (1 segment lit) Off
■Operation condition
The engine switch is in IGNITION ON
mode.
WARNING
■To prevent overheating and minor
burn injuries
Observe the following precautions when
using the seat heaters.
●Do not cover the seat with a blanket or
cushion when using the seat heater.
●Do not use seat heater more than nec-
essary.
ASeat ventilators
A

293
7
7
When trouble arises
When trouble arises
.7-1. Essential informationEmergency flashers.................. 294
If your vehicle has to be stopped in an emergency .......................... 294
If the vehicle is trapped in rising water............................................ 295
7-2. Steps to take in an emergency If your vehicle needs to be towed........................................................ 297
If you think something is wrong ........................................................ 300
Fuel pump shut off system ...... 301
If a warning light turns on or a warning buzzer sounds ....... 302
If a warning message is displayed ......................................................... 310
If you have a flat tire (vehicles with a spare tire) ................................ 313
If you have a flat tire (vehicles with an emergency tire puncture
repair kit) .................................... 319
If the engine wi ll not start .......329
If you lose your keys .................. 331
If the fuel filler door cannot be opened......................................... 331
If the electronic key does not operate properly .................... 332
If the vehicle battery is discharged ........................................................ 334
If your vehicle overheats ........ 337
If the vehicle becomes stuck ........................................................ 339

3127-2. Steps to take in an emergency
power off function. Next time when starting
the engine, increase the engine speed
slightly and maintain that level for approxi-
mately 5 minutes to recharge the battery.
■If “Headlight System Malfunction Visit
Your Dealer” is displayed
The following systems may be malfunction-
ing. Have the vehicle inspected by your
Lexus dealer immediately.
●The LED headlight system
●The automatic headlight leveling system
●Automatic High Beam
■If “Radar Cruise Control Unavailable” is
displayed
The dynamic radar cruise control system
cannot be used temporar ily. Use the system
when it becomes available again.
■If a message that indicates the malfunc-
tion of front camera is displayed
The following systems may be suspended
until the problem shown in the message is
resolved. ( P.155, 305)
●PCS (Pre-Collision System)
●LDA (Lane Departure Alert with steering
control)
●Dynamic radar cruise control
●Automatic High Beam
■If “Maintenance Required Soon” is dis-
played
Indicates that all maintenance according to
the driven distance on the maintenance
schedule
* should be performed soon.
Comes on approximately 4500 miles
(7200 km) after the message has been
reset. If necessary, perform maintenance.
Please reset the message after the mainte-
nance is performed. ( P.257)
*: Refer to the separa te “Scheduled Main-
tenance” or “Owner’s Manual Supple-
ment” for the maintenance interval
applicable to your vehicle.
■If “Maintenance Required Visit Your
Dealer” is displayed
Indicates that all maintenance is required to
correspond to the driven distance on the maintenance schedule
*.
Comes on approximately 5000 miles
(8000 km) after the message has been
reset. (The indicator will not work properly
unless the message ha s been reset.) Per-
form the necessary maintenance. Please
reset the message after the maintenance is
performed. ( P.257)
*: Refer to the separate “Scheduled Main-
tenance” or “Owner’s Manual Supple-
ment” for the main tenance interval
applicable to your vehicle.
■If “Active Rear Wing Off Go to Settings
to turn On” is displayed
The active rear wing switch was pressed
when the active rear wing
* was disabled.
Enable the active rear wing before pressing
the active rear wing switch. ( P.195)
*: If equipped
■If “TVD System Overheated Reduce
Engine Speed and Load” is displayed
The TVD system
* has overheated, this mes-
sage may be displayed when driving under
high load conditions, such as the following:
●When driving at high speeds or through
sharp turns continuously
●When either rear tire has lost traction
and spun continuously
Drive the vehicle for a while, while avoiding
high load conditions.
*: If equipped
■If a message that indicates the need for
visiting your Lexus dealer is displayed
The system or part shown on the
multi-information display is malfunctioning.
Have the vehicle inspected by your Lexus
dealer immediately.
■If “See Owner’s Manual” is displayed
●If the following messages are shown, fol-
lowing the instruct ions, accordingly.
• “Engine Coolant Temp High” ( P.337)
• “Transmission Fluid Temp High” ( P.132)
●If any of the following messages are
shown on the multi-information display, it
may indicate a malfunction. Have the

3377-2. Steps to take in an emergency
7
When trouble arises
1Stop the vehicle in a safe place and
turn off the air conditioning system,
and then stop the engine.
2 If you see steam:
Carefully lift the hood after the
steam subsides.
If you do not see steam:
Carefully lift the hood.
3 After the engine has cooled down
sufficiently, inspect the hoses and
WARNING
●When working with the battery, always
wear safety glasses and take care not
to allow any battery fluids (acid) to
come into contact with skin, clothing
or the vehicle body.
●Do not lean over the battery.
●In the event that battery fluid comes
into contact with the skin or eyes,
immediately wash the affected area
with water and seek medical attention.
Place a wet sponge or cloth over the
affected area until medical attention
can be received.
●Always wash your hands after handling
the battery support, terminals, and
other battery-related parts.
●Do not allow children near the battery.
NOTICE
■When handling jumper cables
When connecting the jumper cables,
ensure that they do not become entan-
gled in the cooling fans or engine drive
belt.
If your vehicle overheats
The following may indicate that
your vehicle is overheating.
 The engine coolant temperature
gauge ( P.66) is in the red zone
or a loss of engine power is expe-
rienced. (For example, the vehicle
speed does not increase.)
 “Engine Coolant Temp High Stop
in a Safe Place See Owner’s
Manual” is shown on the
multi-information display.
 Steam comes out from under the
hood.
Correction procedures

394Alphabetical Index
Seat belts........................................................ 245
Wheels and wheel ornaments.............. 241
Cargo capacity............................................... 126
Cargo hooks ..................................................227
Center Display ...............................................210
Chains .............................................................. 205
Child restraint system Fixed with a LATCH system .................. 49
Fixed with a seat belt................................... 46
Front passenger occupant classification system ............................................................. 36
Installing a CRS to the front passenger seat ................................................................... 44
Points to remember .....................................42
Riding with children ......................................42
Types of child restraint system installation method ........................................................... 43
Using an anchor bracket ............................ 51
Child safety Airbag precautions.......................................32
Battery precautions ...................... 272, 336
Child restraint system................................. 43
Heated steering wheel or seat heater precautions.................................................. 221
How your child should wear the seat belt ............................................................................ 25
Moon roof precautions ............................. 116
Power window lock switch...................... 113
Seat belt extender precautions ............. 25
Seat belt precautions ...................................42
Trunk precautions ........................................ 95
Cleaning Exterior ...................................240, 248, 252
Interior ............................................................. 245
Radar sensor..................................................153
Seat belts........................................................ 245
Wheels and wheel ornaments.............. 241
Clock ................................................................ 230
Clock settings ............................................... 230
Coat hooks..................................................... 229
Compass ......................................................... 236
Condenser ..................................................... 270 Console box ...................................................227
Consumption screen .................................... 83
Cooling system............................................. 269
Engine overheating................................... 337
Cruise control Dynamic radar cruise control................. 171
Cup holders Front cup holders ...................................... 226
Rear cup holders........................................ 226
Current fuel consumption .......................... 75
Curtain shield airbags .................................. 28
Customizable features .............................. 360
D
Daytime running light system .................. 138
Daytime running lights Replacing light bulbs ............................... 289
Defogger Outside rear view mirrors....................... 217
Rear window .................................................. 217
Windshield ...................................................... 217
Differential Differential oil ....... ................................. .......346
Dimension ...................................................... 342
Dinghy towing................................................. 127
Display Center Display ............................................. 210
Drive information .......................................... 75
LDA (Lane Departure Alert with steering control) ......................................................... 166
Multi-information display .......................... 73
Warning message ...................................... 310
Do-it-yourself maintenance .................... 258
Door courtesy lights ................................... 223
Door lock Doors .................................................................. 92
Smart access system with push-button start ...................................................................98
Wireless remote control ...........................90
Doors Automatic door lock ing and unlocking
system.............................................................. 94

395Alphabetical Index
Door glasses ....................................................112
Door lock.......................................................... 92
Open door warning buzzer93, 94, 306
Open door warning light ......................306
Outside rear view mirrors ....................... 110
Drive distance ...................................................75
Drive info 1/Drive info 2/Drive info 3.....75
Drive information ............................................75
Driver’s and front passenger’s seat belt reminder light............................................. 306
Driver’s seat position memory Driving position memory........................ 105
Memory recall function ........................... 106
Power easy access system .................... 105
Drive-start control ......................................... 119
Driving Break-in tips .................................................... 119
Correct driving posture .............................23
Driving mode select switch .................... 192
Procedures ...................................................... 118
Winter drive tips......................................... 204
Driving information display .........................75
Driving position memory........................... 105 Memory recall function ........................... 106
Power easy access system .................... 105
Driving range ....................................................75
Driving support system information display ...............................................................................81
Dynamic radar cruise control ................... 171 Warning message.......................................178
E
Eco Driving Indicator.....................................76
Eco Driving Indicator Light .........................76
EDR (Event data recorder) ............................7
Elapsed time ......................................................75
Electric Power Steering (EPS) ..............200Electric power steer ing system warning
light ................................................................304
Electronic key .................................................. 88 Battery-saving function ............................. 99 If the electronic key does not operate
properly ....................................................... 332
Replacing the battery ...............................283
Emergency flashers .................................... 294
Emergency tire puncture ...........................319
Emergency, in case of If a warning buzzer sounds...................302
If a warning light turns on.......................302
If a warning message is displayed ...... 310
If the battery is discharged ....................334
If the electronic key does not operate properly ....................................................... 332
If the engine will not start........................329
If the fuel filler do or cannot be opened
........................................................................... 331
If the vehicle is trapped in rising water ..........................................................................295
If you have a flat tire ......................... 313, 319
If you lose your keys .................................. 331
If you think something is wrong......... 300
If your vehicle becomes stuck .............339
If your vehicle has to be stopped in an emergency ................................................. 294
If your vehicle needs to be towed ..... 297
If your vehicle overheats ........................ 337
Engine ACCESSORY mode............................... 130
Compartment.............................................. 267
Engine switch ................................................ 128
Fuel pump shut off system...................... 301
Hood ................................................................ 264
Identification number ...............................343
If the engine will not start........................329
If your vehicle has to be stopped in an emergency ................................................. 294
Ignition switch (engine switch)............. 128
Overheating ................................................. 337
Tachometer ..................................................... 66
Engine coolant Capacity .........................................................344
Checking .......................................................269

399Alphabetical Index
“F” content ......................................................... 77
Gear Position ................................................. 76
G-force.............................................................. 79
History (Lap timer) ...................................... 78
Lap timer ............................................................ 77
LDA (Lane Departure Alert with steering control) ..........................................................166
Menu icons .......................................................74
Meter control switches ...............................74
Navigation system-linked display ..........81
Pop-up display................................................73
Settings ................................................................81
Tire pressure ........................................76, 275
Torque distribution ...................................... 78
Units .................................................................... 76
Vehicle sway warning ................................ 76
Warning message...................................... 310
Warning message display .........................81
N
Navigation system-linked display..............81
Noise from under vehicle ...............................6
O
“ODO TRIP” switch .......................................72
Odometer ..........................................................72
Odometer and trip meter display ............72 Display items ....................................................72
“ODO TRIP” switch .....................................72
Oil Differential oil ............................................... 346
Engine oil ....................................................... 343
Opener Fuel filler door............................................... 150
Hood................................................................ 264
Trunk ................................................................... 96
Outer foot lights Location.......................................................... 223
Outside rear view mirrors Adjustment....................................................... 110
BSM (Blind Spot Monitor) ..................... 179 Folding.................................................................. 111
Linked mirror functi
on when reversing111
Mirror position memory .......................... 105
Outside rear view mirror defoggers . 217
RCTA function ..............................................179
Outside temperature.................................... 66
Overheating .................................................. 337
P
Paddle shift switches ..........................134, 135
Panic mode ....................................................... 90
Parking brake Operation ........................................................137
Parking brake engaged warning buzzer............................................................................137
Parking brake warning light ................ 304
Warning message .......................................137
Parking lights Light switch .................................................... 138
Replacing light bulbs ............................... 289
PCS (Pre-Collision System) Function ............................................................157
PCS OFF switch ......................................... 159
PCS warning light .................................... 305
Personal lights............................................... 223
Power control unit coolant Preparing and checking before winter..........................................................................204
Power easy access system ....................... 105
Power outlet .................................................. 228
Power steering (Elect ric power steering
system) ..........................................................200 Electric power steering system warning light ............................................................... 304
Power windows Door lock linked window operation ... 113
Jam protection function ............................. 112
Operation ......................................................... 112
Window lock switch.................................... 113
Pre-Collision System (PCS) Function ............................................................157
PCS OFF switch ......................................... 159