overheating LEXUS RX200T 2017 Owners Manual

992. Instrument cluster
2
Instrument cluster
RX350/RX200t_EE_OM48F32E
■The meters and display illuminate when
The engine switch is in IGNITION ON mode.
■Brightness of the meters (day mode and night mode)
The brightness of the meters is changed between day mode and night mode.
●Day mode: When the tail lights are off or wh en the tail lights are on but the surrounding area is bright
●Night mode: When the tail lights are on and the surrounding area is dark
■Outside temperature display
●In the following situations, the correct outside temperature may not be displayed, or thedisplay may take longer than normal to change.
• When stopped, or driving at low speeds (less than 20 km/h [12 mph]) • When the outside temperature has changed suddenly (at the entrance/exit of agarage, tunnel, etc.)
●When “ ” or “E” is displayed, the system may be malfunctioning. Take your vehicle to any authorized Lexus de aler or repairer, or another duly qualified
and equipped professional.
■Clock settings screen (vehicles with a navigation system only)
If the clock adjustment screen is displayed continuously when attempting to change the
clock settings, the system may be malfunctioning. Have the vehicle inspected by any authorized Lexus dealer or repairer, or another duly qualified and equipped professional.
■Customization
Some functions can be customized. ( P. 110)
NOTICE
■To prevent damage to the engine and its components
●Do not let the indicator needle of the tachometer enter the red zone, which indicates
the maximum engine speed.
●The engine may be overheating if the engine coolant temperature gauge is in the red zone (H). In this case, immediately stop the vehicle in a safe place, and check the
engine after it has cooled completely. ( P. 718)

2444-1. Before driving
RX350/RX200t_EE_OM48F32E
■Important points regarding stability
Vehicle movement resulting from unev en road surfaces and strong cross-
winds will affect handling. The vehicle may also be rocked by passing buses or
large trucks. Frequently check behind when moving alongside such vehicles.
As soon as such vehicle movement occurs, immediately start to decelerate
smoothly by slowly applying the brakes. Always steer the vehicle straight
ahead while braking.
■Passing other vehicles
Consider the total combined length of your vehicle and trailer and ensure that
the vehicle-to-vehicle distance is sufficient before executing lane changes.
■Transmission information
To maintain engine braking efficiency and charging system performance,
when using engine braking, do not use the transmission in D. If in the M mode,
the transmission shift range position must be in 4 or lower. ( P. 251)
■If the engine overheats
Towing a loaded trailer up a long, steep incline in temperatures exceeding
30 C (85F) may result in the engine overheating. If the engine coolant tem-
perature gauge indicates that the engine is overheating, turn the air condition-
ing off immediately, leave the road and stop the vehicle in a safe place.
( P. 718)
■When parking the vehicle
Always place wheel chocks under the wheels of both the vehicle and trailer.
Set the parking brake and shift the shift lever to P.

2484-2. Driving procedures
RX350/RX200t_EE_OM48F32E
■Auto power off function
If the vehicle is left in ACCESSORY mode for more than 20 minutes or IGNITION ON mode (the engine is not running) for more than an hour with the shift lever in P, the engineswitch will automatically turn off. However, this function cannot entirely prevent battery
discharge. Do not leave the vehicle with the engine switch in ACCESSORY or IGNI- TION ON mode for long periods of time when the engine is not running.
■Electronic key battery depletion
 P. 137
■Conditions affecting operation
 P. 170
■Note for the entry function
 P. 171
■If the engine does not start
●The engine immobilizer system may not have been deactivated. (P. 77) Contact any authorized Lexus dealer or repairer, or another duly qualified andequipped professional.
●Check that the shift lever is securely set in P. The engine may not start if the shift lever is displaced out of P. “To Start Vehicle, Put Shift Lever into P” will be displayed on themulti-information display.
■Steering lock
After turning the engine switch off and opening and closing the doors, the steering wheel will be locked due to the steering lock functi on. Operating the engine switch again auto-
matically cancels the steering lock.
■When the steering lock cannot be released
■Steering lock motor overheating prevention
To prevent the steering lock motor from over heating, operation of the motor may be sus-
pended if the engine is turned on and off repeat edly in a short period of time. In this case, refrain from operating the engine switch. After about 10 seconds, the steering lockmotor will resume functioning.
■When “Smart Entry & Start System Malfunction See Owner’s Manual” is displayed onthe multi-information display
The system may be malfunctioning. Have the vehicle inspected by any authorized Lexus
dealer or repairer, or another duly qua lified and equipped professional immediately.
“Steering Wheel Lock Press Engine Switch while Turning Wheel” will be displayed on themulti-information display.
Check that the shift lever is in P. Press the engine switch while turning the steering wheelleft and right.

2604-2. Driving procedures
RX350/RX200t_EE_OM48F32E
The parking brake can be set and released manually.
Sets the parking brake
The parking brake in dicator light and parking brake lamp will turn on.
Pull and hold the parking brake switch if an emergency occurs and it is necessaryto operate the parking brake while driv-
ing.
Releases the parking brake
Operate the parking brake switch while depressing the brake pedal. Make surethat the parking brake indicator light
and parking brake lamp turn off.
If the parking brake indicator light and
parking brake lamp flashes, operate the
switch again. ( P. 666)
■Parking the vehicle
 P. 226
■Parking brake operation
●When the engine switch is not in IGNITION ON mode, the parking brake cannot be released using the parking brake switch.
●When the engine switch is not in IGNITION ON mode, automatic mode (automatic brake setting and releasing) is not available.
■If “Parking Brake Overheated Parking Brake Unavailable” is displayed on the multi-
information display
If the parking brake is operated repeatedly over a short period of time, the system may restrict operation to prevent overheating. If this happens, refrain from operating the
parking brake. Normal operation will return after about 1 minute.
■If “EPB Activation Stopped Incompletely” or “Parking Brake Unavailable” is displayed on the multi-information display
Operate the parking brake switch. If the message does not disappear after operating the switch several times, the system may be malfunctioning. Have the vehicle inspected byany authorized Lexus dealer or repairer, or another duly qualified and equipped profes-
sional immediately.
Manual mode
Parking
brake lamp
1
2

4264-5. Using the driving support systems
RX350/RX200t_EE_OM48F32E
■Automatic reactivation of TRC and VSC systems
After turning the TRC and VSC systems off, the systems will be automatically re-enabled in the following situations:
●When the engine switch is turned off
●If only the TRC system is turned off, the TR C will turn on when vehicle speed increases
If both the TRC and VSC systems are turned off, automatic re-enabling will not occur
when vehicle speed increases.
■Reduced effectiveness of the EPS system
The effectiveness of the EPS system is redu ced to prevent the system from overheating
when there is frequent steering input over an extended period of time. The steering wheel may feel heavy as a result. Should this occur, refrain from excessive steering input or stop the vehicle and turn the engine off. The EPS system should return to normal
within 10 minutes.
■Operating conditions of emergency brake signal
When the following three conditions are me t, the emergency brake signal will operate:
●The emergency flashers are off.
●Actual vehicle speed is over 55 km/h (35 mph).
●The brake pedal is depressed in a manner that cause the system to judge from the vehi-
cle deceleration that this is a sudden braking operation.
■Automatic system cancelation of emergency brake signal
The emergency brake signal will turn of f in any of the following situations:
●The emergency flashers are turned on.
●The brake pedal is released.
●The system judges from the vehicle deceleration that is not a sudden braking operation.

5496-2. Using the air conditioning system and defogger
6
Interior features
RX350/RX200t_EE_OM48F32E
Turns the heated steering wheel on/off
The indicator light comes on when the
heated steering wheel is operating.
Heated steering wheel/seat heaters/seat ventila-
tors
: If equipped
Heated steering wheel and seat heaters heat the side grips of the steering
wheel and seats, respectively. Seat ventilators maintain good airflow by blow-
ing air from the seats.
WARNING
●Care should be taken to prevent injury if anyone in the following categories comes in contact with the steering wheel and seats when the heater is on:
• Babies, small children, the elderly, the sick and the physically challenged
• Persons with sensitive skin • Persons who are fatigued• Persons who have taken alcohol or drugs that induce sleep (sleeping drugs, cold
remedies, etc.)
●Observe the following precautions to prevent minor burns or overheating:
• Do not cover the seat with a blanket or cushion when using the seat heater. • Do not use seat heater more than necessary.
NOTICE
●Do not put heavy objects that have an uneven surface on the seat and do not sticksharp objects (needles, na ils, etc.) into the seat.
●To prevent battery discharge, do not use the functions when the engine is off.
Heated steering wheel

7188-2. Steps to take in an emergency
RX350/RX200t_EE_OM48F32E
Stop the vehicle in a safe place and turn off the air conditioning system, and
then stop the engine.
If you see steam:
Carefully lift the hood after the steam subsides.
If you do not see steam:
Carefully lift the hood.
After the engine has cooled down sufficiently, inspect the hoses and radiator
core (radiator) for any leaks.
Radiator
Cooling fans
If a large amount of coolant leaks,
immediately contact any authorized Lexus dealer or repairer, or anotherduly qualified and equipped profes-
sional.
If your vehicle overheats
The following may indicate that your vehicle is overheating.
●The needle of the engine coolant temperature gauge (P. 96) enters the
red zone, or a loss of engine power is experienced. (For example, the vehi-
cle 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
1
2
3
1
2

761Alphabetical index
RX350/RX200t_EE_OM48F32E
Child safety................................................. 54
Airbag precautions .............................. 43
Back door precautions .................... 148
Battery precautions ................. 610, 717
Child restraint system......................... 54
How your child should wear
the seat belt .......................................... 37
Installing child restraints .................... 54
Moon roof precautions .................... 217
Panoramic moon roof
precautions.......................................... 221
Power back door precautions....... 161
Power window lock switch............ 210
Power window precautions ........... 213
Rear door child-protectors ............143
Removed key battery
precautions........................................639
Seat belt precautions .......................... 39
Seat heater precautions .................549
Child-protectors .................................... 143
Cleaning .......................................584, 589
Aluminum wheels ............................. 585
Exterior................................................... 584
Interior .................................................... 589
Seat belts............................................... 590
Clock ................................................ 96, 568
Coat hooks .............................................. 577
Condenser .............................................. 607
Console box ........................................... 557
Consumption screen ................. 105, 128
Coolant
Capacity..................................................734
Checking ...............................................605
Preparing and checking
before winter.................................... 429
Cooling system ..................................... 605
Engine overheating ............................ 718
Cornering lights .................................... 266
Cruise control
Cruise control ....................................... 341
Dynamic radar cruise control
with full-speed range ................... 329
Cup holders ............................................558
Curtain shield airbags ............................. 41
Customizable features....................... 740
Customized mode ................................. 417
Daytime running light system ...........267
Defogger
Outside rear view mirrors ............ 542
Rear window........................................ 542
Windshield ........................................... 542
Differential............................................... 736
Dimensions ..............................................726
Display
Dynamic radar cruise control
with full-speed range ................... 329
LKA (Lane-Keeping Assist) .......... 319
Multi-information display................ 100
Warning messages .......................... 673
D

763Alphabetical index
RX350/RX200t_EE_OM48F32E
Engine
ACCESSORY mode ..................... 247
Compartment..................................... 599
Engine switch....................................... 246
Hood ........................................................ 597
How to start the engine .................. 246
Identification number ....................... 728
If your vehicle has to be
stopped in an emergency.......... 657
Ignition switch (engine switch) ... 246
Overheating ...........................................718
Engine coolant
Capacity ................................................. 734
Checking .............................................. 605
Preparing and checking
before winter .................................... 429
Engine coolant temperature
gauge......................................................... 96
Engine immobilizer system...................77
Engine oil
Capacity ................................................. 729
Checking ................................................ 601
Preparing and checking
before winter .................................... 429
Engine oil pressure gauge ................. 107
Engine oil temperature gauge ......... 107
Engine switch ......................................... 246
EPS
(Electronic Power Steering)......... 423
Warning light ....................................... 667
ERA-GLONASS ........................ 46, 578
Flat tire ........................................... 679, 693
Floor mats ................................................... 32
Fluid
Automatic transmission.................. 735
Brake ....................................................... 736
Washer.......................................................611
Fog lights
Replacing light bulbs ....................... 643
Switch ...................................................... 278
Follow me home system .................... 266
Front fog lights
Replacing light bulbs ...................... 643
Switch ...................................................... 278
Front passenger footwell hooks ..... 575
Front passenger’s seat belt
reminder light ..................................... 669
Front position lights
Light switch........................................... 265
Replacing light bulbs ....................... 643
Front seat heaters................................. 550
Front seats
Adjustment .............................................185
Cleaning ................................................589
Correct driving posture.....................34
Driving position memory ................ 195
Head restraints ................................... 200
Power easy access system............. 195
Seat heaters..........................................550
Seat position memory .......................195
F

768Alphabetical index
RX350/RX200t_EE_OM48F32E
Navigation system*
Odometer...................................................118
Oil
Engine oil ............................................... 729
Rear differential oil............................. 736
Transfer oil............................................. 736
Opener
Back door................................................146
Hood ........................................................ 597
Power back door.................................152
Outside rear view mirrors ................206
Adjusting and folding.......................206
Blind Spot Monitor (BSM) ...........355
Linked mirror function
when reversing............................... 208
Mirror position memory.................. 195
Outside rear view mirror
defoggers........................................... 542
Outside temperature display ............. 96
Overheating ............................................ 718
Paddle shift switches ................252, 253
Panoramic moon roof ..........................218
Jam protection function ................... 219
Operation ............................................... 218
Parking assist sensors........................... 371
Parking brake......................................... 259
Parking brake engaged
warning buzzer/message ........... 261
Warning light....................................... 667
PCS (Pre-Crash Safety system) ....300
Warning light.......................................668
Personal lights........................................ 554
Power back door ..................................... 151
Touchless power back door ......... 153
Wireless remote control ...................151
Power back door opener
and closer ................................................ 151
Power easy access system .................195
Power outlets ......................................... 574
Power steering (Electric
Power Steering system) ................. 423
Warning light....................................... 667
Power windows
Door lock linked window
operation.............................................. 212
Jam protection function ..................... 211
Operation ............................................... 210
Window lock switch .......................... 210
Pre-Crash Safety system (PCS) ....300
Warning light.......................................668
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