overheating Lexus GS450h 2015 Owner's Manual

801-2. Hybrid system
GS450h_OM_OM30F70U_(U)
CAUTION
■Hybrid battery (traction battery)
●Your vehicle contains a sealed nickel-metal hydride battery. Never resell, hand
over or modify the hybrid battery. To prevent accidents, hybrid batteries that have
been removed from a disposed vehicle are collected through Lexus dealer. Do
not dispose of the battery yourself.
Unless the battery is properly collected, the following may occur, resulting in
death or serious injury:
• The hybrid battery may be illegally disposed of or dumped, and it is hazardous
to the environment or someone may touch a high voltage part, resulting in an
electric shock.
• The hybrid battery is intended to be used exclusively with your hybrid vehicle. If the hybrid battery is used outside of your vehicle or modified in any way,
accidents such as electric shock, heat generation, smoke generation, an
explosion and electrolyte leakage may occur.
When reselling or handing over your vehicle, the possibility of an accident is
extremely high because the person receiving the vehicle may not be aware of
these dangers.
●If your vehicle is disposed of without the hybrid battery having been removed,
there is a danger of serious electric shock if high voltage parts, cables and their
connectors are touched. In the event that your vehicle must be disposed of, the
hybrid battery must be disposed of by your Lexus dealer or a qualified service
shop. If the hybrid battery is not disposed of properly, it may cause electric shock
that can result in death or serious injury.
NOTICE
■Hybrid battery air vents
●Do not put foreign objects near the air vents. The hybrid battery (traction battery)
may overheat and be damaged.
●Clean the air vents regularly to prevent the hybrid battery (traction battery) from
overheating.
●Do not wet or allow foreign substances to enter the air vents as this may cause a
short circuit and damage the hybrid battery (traction battery).
●Do not carry large amounts of water such as water cooler bottles in the vehicle. If
water spills onto the hybrid battery (traction battery), the battery may be dam-
aged. Have the vehicle inspected by your Lexus dealer.
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GS450h_OM_OM30F70U_(U)
952. Instrument cluster
2
Instrument cluster
■ECO lamp and SPORT lamp
●When sport mode is selected, SPORT lamp (red) will illuminate.
●When all of the following conditions are satisfied and Eco-friendly driving, ECO
lamp (blue) will illuminate. (ECO lamp will become brighter the more Eco-friendly
driving you perform. Also, while the vehicle is stopped or the acceleration exceeds
Zone of Eco driving, ECO lamp turns off. [→P. 94] However, when Eco drive
mode is selected, while the vehicle is stopped or the acceleration exceeds Zone of
Eco driving, ECO lamp does not turn off.):
• Driving with the shift lever in D
• Paddle shift switch is not operated.
• Either normal mode or Eco drive mode is selected.
• The vehicle speed is approximately 80 mph (130 km/h) or below.
■Tachometer
Hybrid System Indicator switches to the tachometer when driving mode is in sport
mode.
■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 vehi-
cle operation and driving conditions are the same.
■Customization
Settings (e.g. on/off operation of ECO lamp) can be changed.
(Customizable features: → P. 599)
NOTICE
■To prevent damage to the engine and its components
●Do not let the indicator needle of the tachometer enter the red zone, which indi-
cates 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. 566)
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4-1. Before driving
CAUTION
■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 cause an accident or fire due to
hybrid system overheating. Additionally, if the vehicle is parked in a poorly venti-
lated area, exhaust gases may collect and enter the vehicle, leading to death or a
serious health hazard.
■When braking
●When the brakes are wet, drive more cautiously.
Braking distance increases when the brakes are wet, and this may cause one side
of the vehicle to brake differently than the other side. Also, the parking brake may
not securely hold the vehicle.
●If the electronically controlled brake system does not operate, do not follow other
vehicles closely and avoid hills or sharp turns that require braking.
In this case, braking is still possible, but the brake pedal should be depressed
more firmly than usual. Also, the braking distance will increase. Have your brakes
fixed immediately.
●The brake system consists of 2 or more individual hydraulic systems; if one of the
systems fails, the other(s) will still operate. In this case, the brake pedal should be
depressed more firmly than usual and the braking distance will increase. Have
your brakes fixed immediately.
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GS450h_OM_OM30F70U_(U)
1974-2. Driving procedures
4
Driving
■When the steering lock cannot be released
■Steering lock motor overheating prevention
To prevent the steering lock motor from overheating, the motor may be suspended if
the hybrid system is turned on and off repeatedly in a short period of time. In this
case, refrain from operating the hybrid system. After about 10 seconds, the steering
lock motor will resume functioning.
■When “Check Access System with Elec. Key” will be displayed on the multi-infor-
mation display
The system may be malfunctioning. Have the vehicle inspected by your Lexus dealer
immediately.
■If the “READY” indicator does not come on
If the “READY” indicator does not come on when you press the power switch with
the shift lever in P and the brake pedal depressed, contact your Lexus dealer imme-
diately.
■If the hybrid system is malfunctioning
→P. 5 1 4
■If the electronic key battery is depleted
→P. 4 6 0
■Operation of the power switch
●When operating the power switch, one short, firm press is enough. If the switch is
pressed improperly, the hybrid system may not start or the power switch mode may
not change. It is not necessary to press and hold the switch.
●If attempting to restart the hybrid system immediately after turning the power
switch off, the hybrid system may not start in some cases. After turning the power
switch off, please wait a few seconds before restarting the hybrid system.
■If the smart access system with push-button start has been deactivated in a cus-
tomized setting
→P. 559
“Steering Lock active” will be displayed on
the multi-information display.
Check that the shift lever is set in P. Press the
power switch while turning the steering wheel
left and right.
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4-2. Driving procedures
The parking brake is set or released automatically according to shift lever
operation.
Turns automatic mode on/off
●When the shift lever is moved out
of P, the parking brake will be
released.
●When the shift lever is moved into
P, the parking brake will be set.
Operate the shift lever with the brake
pedal depressed.
■Parking brake operation
●When the power switch is not in ON mode, the parking brake cannot be released
using the parking brake switch.
●When the power switch is not in ON mode, automatic mode (automatic brake set-
ting and releasing) is not available.
●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 operat-
ing the parking brake. Normal operation will return after about 1 minute.
■Parking brake operation sound
When the parking brake operates, a motor sound (whirring sound) may be heard.
This does not indicate a malfunction.
■Parking brake indicator light
●Depending on the power switch mode, the parking brake indicator light will come
on and stay on as described below:
ON mode: Comes on until the parking brake is released.
Not in ON mode: Stays on for approximately 15 seconds.
●When the power switch is turned off with the parking brake set, the parking brake
indicator light will stay on for about 15 seconds. This does not indicate a malfunc-
tion.
Automatic mode
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5-5. Other interior features
■When the switch is disabled (vehicles with rear control panel)
When the rear control panel switch cannot be operated even though the button lock
function is released, check whether the switch is disabled due to selecting
on Remote Touch screen. (→P. 3 4 8 )
■Rear control panel illumination off function (vehicles with rear control panel)
Control panel illumination on the rear armrest can be turned off. ( →P. 3 5 9 )
■Customization
The automatic mode settings for the front seat heaters and ventilators or the rear
seat heaters can be changed. (Customizable features: →P. 599)
CAUTION
■Burns
●Use caution when seating the following persons in a seat with the seat heater on
to avoid the possibility of burns:
• 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.)
●Do not cover the seat with anything when using the seat heater.
Using the seat heater with a blanket or cushion increases the temperature of the
seat and may lead to overheating.
●Do not use seat heater more than necessary. Doing so may cause minor burns or
overheating.
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5327-2. Steps to take in an emergency
GS450h_OM_OM30F70U_(U)
*: Refer to the separate “Scheduled Maintenance” or “Owner’s Manual Supple-ment” for the maintenance interval applicable to your vehicle.
Warning messageDetailsCorrection procedure
Indicates that the tire
position information can-
not be recognized
Drive for a short while
and check if the display
updates. If the radio wave condi-
tions improve, the dis-
play may return to
normal. If the tire pres-
sure is still not dis-
played after driving for
several minutes, stop
the vehicle in a safe
place, turn the power
switch off then on
again, and start driving.
If the tire pressure is still
not displayed even
after repeating this sev-
eral times, have the
vehicle inspected at
your Lexus dealer.
Indicates that the pre-col-
lision system is not cur-
rently functional because
the grille cover or the
sensor is dirtyThis message also
appears when the pre-
collision system is not
functional due to over-
heating.
• Check the grille coverand the sensor and
clean them if they are
dirty.
• In case of overheating, the system will become
functional once the sys-
tem cools down.
(If equipped)
(Flashes)
(If equipped)
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7-2. Steps to take in an emergency
If your vehicle overheats
■If the needle of the engine coolant temperature gauge enters the red
zone
Stop the vehicle in a safe place and turn off the air conditioning sys-
tem, 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 cooling system for 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.
●The needle of the engine coolant temperature gauge ( →P. 91) enters
the red zone or a loss of hybrid system power is experienced. (For
example, the vehicle speed does not increase.)
●“Hybrid System Overheat” ( →P. 527) is shown on the multi-informa-
tion display.
●Steam comes out from under the hood.
Correction procedures
1
2
3
1
2
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636Alphabetical index
GS450h_OM_OM30F70U_(U)
Child restraint system............................ 57Booster seats, definition .................... 57
Booster seats, installation.................. 67
Convertible seats, definition ............ 57
Convertible seats, installation .........64
Front passenger occupant
classification system .........................49
Infant seats, definition .......................... 57
Infant seats, installation .......................64
Installing CRS
with LATCH anchors ..................... 62
Installing CRS with seat belts .......... 64
Installing CRS with top tether strap .........................68
Child safety ................................................ 56 12-volt battery
precautions.............................441, 565
Airbag precautions ................................41
Child restraint system ......................... 57
How your child should wear
the seat belt ................................. 33, 35
Installing child restraints.......................61
Moon roof precautions.....................174
Power window lock switch .............167
Power window precautions .......... 170
Rear door child-protectors ........... 140
Removed electronic key battery precautions................ 461
Seat belt comfort guide ..................... 33
Seat belt extender precautions ...... 37
Seat belt precautions ..........................60
Seat heater precautions................. 384
Trunk precautions............................... 146 Child-protectors ....................................140
Cleaning ........................................ 408, 412
Aluminum wheels ..............................409
Exterior .................................................. 408
Interior ....................................................... 412
Seat belts.................................................. 413
Clock..........................................................376
Coat hooks ............................................. 390
Condenser.............................................. 436
Console box........................................... 369
Console box light ................................. 369
Consumption screen ..............................114
Coolant .....................................................434 Capacity ................................................. 579
Checking ............................................... 434
Preparing and checking before
winter..................................................... 318
Cooling system ......................................434
Engine overheating ..........................566
Hybrid system overheating ..........566
Cruise control Cruise control ..................................... 235
Dynamic radar crui se control ..... 239
Dynamic radar cruise control
with full-speed range ................... 254
Cup holders............................................ 370
Curtain shield airbags ............................39
Customizable features ...................... 599
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638Alphabetical index
GS450h_OM_OM30F70U_(U)
Electronic key ......................................... 120Battery-saving function .................... 129
If the electronic key does not operate properly............................ 559
Replacing the battery ...................... 460
Emergency, in case of
If a warning buzzer sounds.......... 503
If a warning light turns on.............. 503
If a warning message is displayed ......................................... 513
If the 12-volt battery is discharged .........................................562
If the electronic key does not operate properly ....... 559
If the hybrid system will not start....................................... 554
If the parking brake cannot be released........................557
If the shift lever cannot be shifted from P ........... 556
If you have a flat tire ........................... 541
If you think something is wrong.............................................. 502
If your vehicle becomes stuck ...... 571
If your vehicle has to be stopped in an emergency ............................ 495
If your vehicle needs to be towed ...................................... 496
If your vehicle overheats ............... 566
Emergency flashers ............................. 494
Energy monitor ........................................ 112 Engine
Accessory mode .................................194
Compartment ..................................... 429
Engine switch ........................................193
Hood........................................................ 426
How to start the hybrid system ....193
Identification number ....................... 575
Ignition switch
(power switch) ..................................193
Overheating.........................................566
Power switch .........................................193
Engine compartment cover............. 430
Engine coolant .......................................434 Capacity ................................................. 579
Checking ............................................... 434
Preparing and checking
before winter ..................................... 318
Engine coolant temperature
gauge .......................................................... 91
Engine oil ................................................... 431
Capacity ................................................. 577
Checking ................................................. 431
Oil level warning message ........... 525
Oil pressure warning message.............................514
Preparing and checking
before winter ..................................... 318
Engine oil maintenance data ............. 416
Engine switch........................................... 193
EPS (Electric Power Steering) ....... 284
Function .................................................. 284
Warning light .......................................504
Warning message.............................. 518
EV drive mode ...................................... 200
Event data recorder (EDR).....................11
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