2017 Lexus CT200h overheating

CT200h_OM_OM76215U_(U)
892. Instrument cluster
2
Instrument cluster
■Engine speed
On hybrid vehicles, engine speed is precisely controlled in order to help improve fuel
efficiency and reduce exhaust emissions etc.
There are times when the engine speed that is displayed may differ even when vehicle
operation and driving conditions are the same.
■Outside temperature display
●In the following situations, the correct outside temperature may not be displayed, or the
display may take longer than normal to change.
• When stopped, or driving at low speeds (less than 12 mph [20 km/h])
• 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 your Lexus dealer.
■Customization
Settings (e.g. on/off operation of the ECO lamp) can be changed.
(Customizable features: P. 5 9 8 )
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 high coolant temperature warning light comes
on or flashes. In this case, immediately stop the vehicle in a safe place, and check the
engine after it has cooled completely. ( P. 5 7 2 )

150
CT200h_OM_OM76215U_(U)4-1. Before driving
WA R N I N G
Observe the following precautions.
Failure to do so may result in death or serious injury.
■When the vehicle is parked
●Do not leave glasses, cigarette lighters, sp
ray cans, or soft drink cans in the vehicle
when it is in the sun.
Doing so may result in the following:
• Gas may leak from a cigarette lighter or spray can, and may lead to a fire.
• The temperature inside the vehicle may cause the plastic lenses and plastic mate- rial of glasses to deform or crack.
• Soft drink cans may fracture, causing the contents to spray over the interior of the vehicle, and may also cause a short circuit in the vehicle’s electrical components.
●Do not leave cigarette lighters in the vehicle. If a cigarette lighter is in a place such as
the glove box or on the floor, it may be lit accidentally when luggage is loaded or the
seat is adjusted, causing a fire.
●Do not attach adhesive discs to the windsh ield or windows. Do not place containers
such as air fresheners on the instrument panel or dashboard. Adhesive discs or con-
tainers may act as lenses, causing a fire in the vehicle.
●Do not leave a door or window open if the curved glass is coated with a metallized
film such as a silver-colored one. Reflected sunlight may cause the glass to act as a
lens, causing a fire.
●Always apply the parking brake, shift the shift position to P, stop the hybrid system and
lock the vehicle.
Do not leave the vehicle unattended while the “READY” indicator is illuminated.
If the vehicle is parked with the shift position in P but the parking brake is not set, the
vehicle may start to move, possibly leading to an accident.
●Do not touch the exhaust pipe while the “R EADY” indicator is illuminated or immedi-
ately after turning the hybrid system off.
Doing so may cause burns.
■When taking a nap in the vehicle
Always turn the hybrid system off. Otherwise, if you accidentally move the shift lever or
depress the accelerator pedal, this could caus e an accident or fire due to hybrid system
overheating. Additionally, if the vehicle is parked in a poorly ventilated area, exhaust
gases may collect and enter the vehicle, lead ing to death or a serious health hazard.

240
CT200h_OM_OM76215U_(U)4-5. Using the driving support systems
■EPS operation sound
When the steering wheel is operated, a motor sound (whirring sound) may be heard.
This does not indicate a malfunction.
■Reduced effectiveness of the EPS system
The effectiveness of the EPS system is reduced 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 hybrid system off. The EPS system should return to nor-
mal within 10 minutes.
■Operating conditions of hill-start assist control
When the following four conditions are met, the hill-start assist control will operate:
●The shift position is in a position other than P or N (when starting off forward/backward
on an upward incline).
●The vehicle is stopped.
●The accelerator pedal is not depressed.
●The parking brake is not engaged.
■Automatic system cancelation of hill-start assist control
The hill-start assist control will turn off in any of the following situations:
●Shift the shift position to P or N
●The accelerator pedal is depressed
●The parking brake is engaged.
●Approximately 2 seconds elapse after the brake pedal is released.
■Automatic reactivation of TRAC system
After turning the TRAC system off, the system will be automatically re-enabled in the fol-
lowing situations:
●When the power switch is turned off
●The TRAC will turn on when vehicle speed increases

429
CT200h_OM_OM76215U_(U)6-1. Using the air conditio
ning system and defogger
6
Interior features
Heated steering wheel/seat heaters

: If equipped
Heated steering wheel and seat heater s heat the side grips of the steering
wheel and seats, respectively.
WA R N I N G
●Care should be taken to prevent injury if anyone in the following categories comes in
contact with the steering wheel an d 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 (s leeping 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 stick
sharp objects (needles, nails, etc.) into the seat.
●To prevent 12-volt battery discharge, do not use the functions when the hybrid system
is off.

5498-2. Steps to take in an emergency
CT200h_OM_OM76215U_(U)
8
When trouble arises
*1: Refer to the separate “Scheduled Maintenance” or “Owner’s Manual Supplement” for the maintenance interval applicable to your vehicle.
*2: For the EV drive mode operating conditions ( P. 1 6 3 ) .
(U.S.A. only)
Indicates that all maintenance according to the driven
distance on the maintenance schedule
*1 should be per-
formed soon. Comes on approximately 4500 miles (7200 km)
after the message has been reset.
 If necessary, perform maintenance.
(U.S.A. only)
Indicates that all maintenance is required to correspond
to the driven distance on the maintenance schedule
*1.
Comes on approximately 5000 miles (8000 km)
after the message has been reset.
(The indicator will not work properly unless the mes-
sage has been reset.)
 Perform the necessary maintenance. Please reset
the message after the maintenance is performed
( P. 4 7 3 )
(If equipped)
Indicates that the pre-collisio n system is not currently
functional because the grille cover or the sensor is dirty
This message also appears when the pre-collision sys-
tem is not functional due to overheating.
 Check the grille cover and the sensor and clean
them if they are dirty.
In case of overheating, the system will become func-
tional once the system cools down.
Indicates that the EV drive mode is not available*2
The reason the EV drive mode is not available (the
vehicle is idling, battery char ge is low, speed is higher
than the EV drive mode operating speed range, accel-
erator pedal is depressed too much) may be dis-
played.
A buzzer also sounds.
 Use the EV drive mode when it becomes available.
Indicates that the EV drive mode has been automatically
canceled*2
The reason the EV drive mode is not available (the
battery charge is low, sp eed is higher than the EV
drive mode operating speed range, accelerator pedal
is depressed too much) may be displayed.
A buzzer also sounds.
 Drive the vehicle for a while.
Wa r n i n g m e s s a g eDetails/Actions
(Flashes
3 times)

572
CT200h_OM_OM76215U_(U)8-2. Steps to take in an emergency
If your vehicle overheats
●The high coolant temperature warning light (
P. 536) comes on or flashes,
or a loss of hybrid system power is experienced. (For example, the vehicle
speed does not increase.)
●The warning message indicating overheat s is shown on the multi-information
display. ( P. 5 4 8 )
●Steam comes out from under the hood.
■If the high coolant temperature warning light comes on or flashes
Stop the vehicle in a safe place and tu rn off the air conditioning system, and
then stop the hybrid system.
If you see steam:
Carefully lift the hood after the steam subsides.
If you do not see steam:
Carefully lift the hood.
After the hybrid system 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 your Lexus
dealer.
The following may indicate that your vehicle is overheating.
Correction procedures
1
2
3
1
2

625Alphabetical index
CT200h_OM_OM76215U_(U)
Cooling system ..................................... 487Hybrid system overheating .......... 572
Consumption screen ............................. 93
Cruise control Cruise control....................................... 189
Dynamic radar cruise control ................................................... 192
Cup holders ............................................ 434
Curtain shield airbags ........................... 40
Customizable features .......................598
Daytime running light system ............ 173
Defogger Outside rear view mirrors....................................... 418, 424
Rear window ............................. 418, 424
Windshield ................................. 418, 424
Dimension ............................................... 578
Dinghy towing......................................... 158
Display Drive information ..................................90
Dynamic radar cruise control ................................................... 192
Energy monitor ...................................... 93
Multi-information display ..................90
Warning messages...........................542
Do-it-yourself maintenance ............. 478 Doors
Automatic door locking and unlocking system............................... 110
Back door..................................................112
Door glasses ..........................................139
Door lock.................................................107
Open door warning buzzer ........ 536
Open door warning light .............. 536
Outside rear view mirrors .............. 137
Rear door child-protectors ............. 110
Side doors ...............................................107
Drive information .................................... 90
Driver’s seat belt reminder light ..........................................................537
Driver’s seat position memory.......... 126
Driving Break-in tips ........................................... 147
Correct posture .....................................32
Driving mode select switch ...........237
Hybrid vehicle driving tips .............247
Procedures .............................................146
Winter drive tips ................................ 249
Driving position memory .................... 126 Memory recall function .................... 127
Dynamic radar cruise control Function .................................................... 192
Warning message............................. 547
D

626Alphabetical index
CT200h_OM_OM76215U_(U)
ECO lamp .................................................. 88
EDR (Event data recorder) ...................13
Electric motorLocation ..................................................... 67
Specification .........................................579
Electric Power Steering (EPS) Function ................................................. 238
Warning light ...................................... 536
Electronic key If the electronic key does not operate properly............................ 566
Replacing the battery ...................... 509
Emergency flashers ............................. 528
Emergency, in case of If a warning buzzer sounds.......... 535
If a warning light turns on.............. 535
If a warning message is displayed.............................................542
If the 12-volt battery is discharged ........................................ 568
If the electronic key does not operate properly............................ 566
If the hybrid system will not start ............................................... 564
If you have a flat tire ......................... 555
If you lose your keys ............... 104, 106
If you think something is wrong ...................................................534
If your vehicle becomes stuck ......................................................576
If your vehicle has to be stopped in an emergency ..........529
If your vehicle needs to be towed................................................... 530
If your vehicle overheats ................ 572 Energy monitor .........................................93
Engine
Accessory mode ................................ 160
Compartment ..................................... 483
Engine switch ........................................159
Hood....................................................... 480
How to start the hybrid system ....................................................159
Identification number ....................... 579
If your vehicle has to be stopped in an emergency.......... 529
Ignition switch (power switch) ..................................159
Overheating......................................... 572
Power switch .........................................159
Engine compartment cover............. 484
Engine coolant Capacity .................................................. 581
Checking ............................................... 487
Preparing and checking before winter .................................... 249
Engine oil Capacity ................................................ 580
Checking ............................................... 484
Oil pressure warning light ............535
Engine oil maintenance data ............473
Engine switch ........................................... 159 Auto power off function .................... 161
Changing the power switch modes ................................................... 160
If your vehicle has to be stopped in an emergency.......... 529
Starting the hybrid system...............159
EPS (Electronic Power Steering) Function .................................................. 238
Warning light .......................................536
E