overheating LEXUS LX570 2015 Owners Manual

1742-1. Driving procedures
LX570_OM_OM60L96U_(U) CAUTION■
Exhaust gases
Exhaust gases include harmful carbon monoxide (CO) that is colorless and odor-
less. Inhaling exhaust gases may lead to death or a serious health hazard.●
If the vehicle is in a poorly ventilated ar ea, stop the engine. In a closed area, such
as a garage, exhaust gases may collect and enter the vehicle. This may lead to
death or a serious health hazard. ●
The exhaust should be checked occasionally. If there is a hole or crack caused by
corrosion, damage to a joint or abnormal ex haust noise, be sure to have the vehi-
cle inspected and repaired by your Lexus dealer. Failure to do so may allow
exhaust gases to enter the vehicle, result ing in death or a serious health hazard.■
When taking a nap in the vehicle
Always turn the engine off.
Otherwise, you may accidentally move the shift lever or depress the accelerator
pedal, which could cause an accident or fire due to abnormal engine overheating.
Additionally, if the vehicle is parked in a poorly ventilated area, exhaust gases may
collect and enter the vehicle, leading to death or a serious health hazard. ■
When braking the vehicle ●
When the brakes are wet, drive more cautiously.
Braking distance increases when the brakes are wet, and 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 power brake assist function does not operate, do not follow other vehicles
closely and avoid hills or shar p turns that require braking.
In this case, braking is still possible, but the brake pedal should be depressed
more firmly than usual. Also, th e braking distance will increase.
Have your brakes fixed immediately. ●
Do not pump the brake peda l if the engine stalls.
Each push on the pedal uses up the reserve for the power-assisted brakes. ●
The brake system consists of 2 individual hydraulic systems: If one of the systems
fails, the other 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.

1952-2. Instrument cluster
2
When driving
LX570_OM_OM60L96U_(U) ■
The meters and display illuminate when
The “ENGINE START STOP” switch is in IGNITION ON mode. ■
The brightness of the instrument panel lights
When the tail lights are turned on, the mete r’s brightness will be reduced slightly
unless the meter brightness level adjust ment is set to the brightest setting.
If the tail lights are turned on when th e surroundings are dark, the meter’s bright-
ness will be reduced slightly. However, wh en the surroundings are bright, such as
during the daytime, the meter’s brightness wi ll not be reduced even if the tail lights
are turned on.
NOTICE■
To prevent damage to the engine and its components ●
Do not let the indicator needle of the ta chometer enter the red zone, which indi-
cates the maximum engine speed. ●
The engine may be overheating if the engi ne 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. 878)■
Voltmeter
When the voltmeter indicates 19 V or higher or 9 V or lower while the engine is
running, there may be a battery or chargi ng system malfunction. Have the vehicle
inspected at your Lexus dealer. ■
Engine oil pressure gauge
When the value of the engine oil pressure gauge drops while the engine is running,
stop the vehicle in a safe place immediately and check the amount of engine oil.
(  P. 753)
When the oil pressure drops even though the engine oil amount has not decreased,
or if the oil pressure does not increase when engine oil is added, contact your Lexus
dealer, as there may be a problem with the lubrication system.

3422-4. Using other driving systems
LX570_OM_OM60L96U_(U) ■
Function limitations
Crawl Control ●
In the following situations, brake control can be used to drive downhill at a con-
stant speed. However, engine control is not available when driving uphill at a
constant speed.
• When switched to second start mode. ●
In the following situation, engine contro l and brake control will stop temporarily.
In this event, the Crawl Control indicator will flash.
• When the vehicle speed exceeds approximately 15 mph (25 km/h).
Turn Assist function
In the following situations, the Turn Assist function will stop temporarily. In this
event, the Turn Assist indicator will flash. ●
When the vehicle speed exceeds approximately 6 mph (10 km/h). ●
When the shift lever is moved to “R”.■
When the Crawl Control system is operated continuously ●
If Crawl Control is used continuously for a long time, the buzzer will sound, a
malfunction notification will be displaye d on the multi-information display, the
Crawl Control indicator will go off, and Crawl Control will be temporarily inop-
erable as a result of the brake system overheating. In this event, stop the vehicle
immediately in a safe place, and allow th e brake system to cool down sufficiently
until the “TRAC OFF” on the multi-information display goes off. (In the mean-
time, normal driving is possible.) ●
If Crawl Control is used continuously for a long time, the buzzer will sound, the
system will be temporarily canceled, and a malfunction notification will be dis-
played on the multi-informat ion display as a result of the automatic transmission
system overheating. Stop the vehicle in a safe place until the display goes off.

3942-5. Driving information
LX570_OM_OM60L96U_(U) ● Avoid jerky starts or sudden acceleration.
● Avoid jerky steering and sharp turn s, and slow down before making a
turn.
● Note that when making a turn, the trailer wheels will be closer than the
vehicle wheels to the inside of th e turn. Compensate by making a
wider than normal turning radius.
● Slow down before making a turn, in crosswinds, on wet or slippery sur-
faces, etc.
Increasing vehicle speed can destabilize the trailer.
● Take care when passing other vehi cles. Passing requires considerable
distance. After passing a vehicle, do not forget the length of your
trailer, and be sure you have plenty of room before changing lanes.
● To maintain engine braking efficie ncy and charging system perfor-
mance when using engine braking, do not put the transmission in “D”.
If in the S mode, the transmission shift range position must be in 5 or
lower.
● Instability happens more frequently when descending steep or long
downhill grades. Before descending , slow down and downshift. Do not
make sudden downshifts while desc ending steep or long downhill
grades.
● Avoid holding the brake pedal down too long or applying the brakes
too frequently. This could cause the brakes to overheat and result in
reduced braking efficiency.
● Due to the added load of the trail er, your vehicle’ s engine may over-
heat on hot days (at temperatures over 85°F [30°C]) when driving up
a long or steep grade. If the engine coolant temperature gauge indi-
cates overheating, immediately turn off the air conditioning (if in use),
pull your vehicle off the road and stop in a safe spot. (  P. 878)

7083-8. Other interior features
LX570_OM_OM60L96U_(U) CAUTION■
Burns ●
Only appropriately qualified and capable non-impaired persons should operate
the vehicle. However, care should be taken to prevent injury if anyone in the fol-
lowing categories comes into contact with the steering wheel when the heated
steering wheel is on:
• Babies, small children, the elderly, the sick and the disabled
• 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 use the heated steering wheel more than necessary. Doing so may cause
minor burns or overheating.
NOTICE■
To prevent battery discharge
Turn the switch off when the engine is not running.

7113-8. Other interior features
3
Interior features
LX570_OM_OM60L96U_(U) ■
The seat heaters and ventilators can be used when
The “ENGINE START STOP” switch is in IGNITION ON mode. ■
Replacing the air filters
Filters are installed in the seat ventilators. For replacement of the filters, contact
your Lexus dealer.
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 dr ugs 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 the seat heater more than necessary. Doing so may cause minor
burns or overheating.
NOTICE■
To prevent damage to the seat heaters and ventilators
Do not put heavy objects that have an unev en surface on the seat and do not stick
sharp objects (needles, nail s, etc.) into the seat.■
To prevent battery discharge
Turn the seat heaters an d ventilators off when the engine is not running.

8465-2. Steps to take in an emergency
LX570_OM_OM60L96U_(U) Warning message Details Correction procedure
(Flashes)
(If equipped) Indicates that the pre-
collision system is not
currently functional
because the grille or the
sensor is dirty • Check the grille and the
sensor and clean them if
they are dirty.
• In case of overheating,
the system will become
functional once the sys-
tem cools down.Indicates that the pre-
collision system is not
currently functional due
to overheating.
(If equipped) Indicates that intuitive
parking assist sensor is
dirty or covered with ice Clean the sensor.
(If equipped) Indicates that the
dynamic radar cruise
control sensor is dirty or
covered with ice Clean the sensor.

5
When trouble arises
8795-2. Steps to take in an emergency
LX570_OM_OM60L96U_(U) If your vehicle overheats
Correction procedures
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 your Lexus
dealer.The following may indicate that your vehicle is overheating.
● The needle of the engine coolant temperature gauge (  P. 192)
enters the red zone or a loss of engine power is experienced.
(For example, the vehicle speed does not increase.)
● Steam is coming from under the hood. STEP 1
STEP 2
STEP 3

944Alphabetical index
LX570_OM_OM60L96U_(U) Cleaning
Exterior ................................................... 734
Interior ......................................................737
Seat belts................................................ 738
Clock .......................................................... 415
Condenser ..............................................758
Console box ........................................... 692
Cool box...................................................699
Cooling system
Engine overheating ..........................878
Crawl Control........................................ 337
Cruise control ............................ 232, 236
Cup holder .............................................. 694
Curtain shield airbags.......................... 126
Customizable features ........................ 912
Daytime running light system ............. 211
Defogger
Rear window ........................................460
Side mirror ............................................460
Dimension ............................................... 886
Dinghy towing ......................................... 401
Display
Crawl Control display ................... 337
Dynamic radar cruise control .... 236
Intuitive parking assist system
display .................................................. 252
Multi-information display...............200
Shift position and shift
range ...........................................184, 186
Trip information ....................................201
Warning message............................. 837
Do-it-yourself maintenance ............. 747
Door courtesy lights
Door courtesy lights........................ 686
Wattage................................................. 896 Door lock
Back door ................................................ 56
Side door...................................................52
Wireless remote control key...........49
Doors
Door glasses..........................................108
Door lock ................................ 35, 49, 52
Side mirrors............................................ 104
Driver’s seat belt reminder
light.......................................................... 829
Driving
Break-in tips........................................... 167
Correct posture................................... 124
Off-road precautions...................... 363
Procedures............................................. 166
Winter driving tips .............................376
Driving position memory...................... 83
DVD player............................................. 507
Dynamic radar cruise control ......... 236
Eco driving ............................................... 168
EDR ............................................................... 25
Electronic key
If your electronic key battery is
discharged ........................................ 784
Emergency flashers .............................. 816
Emergency, in case of
If the electronic key does not
operate properly.............................872
If the engine will not start ...............868
If the shift lever cannot be
shifted from “P” ............................... 870
If the vehicle has discharged
battery ................................................. 875
If the warning buzzer
sounds ................................................. 826D
E

945Alphabetical index
LX570_OM_OM60L96U_(U) If the warning light turns on .......... 826
If the warning message is
displayed ............................................ 837
If you have a flat tire ........................ 854
If you lose your keys .......................... 871
If you think something is
wrong................................................... 824
If your vehicle becomes
stuck ...................................................... 881
If your vehicle has to be
stopped in an emergency .........883
If your vehicle needs to be
towed ..................................................... 817
If your vehicle overheats................ 878
Engine
Compartment ....................................... 751
Engine switch .........................................177
Hood ....................................................... 750
How to start the
engine .....................................................177
Identification number....................... 887
If the engine will not start .............. 868
Ignition switch.........................................177
Overheating......................................... 878
Engine coolant
Capacity...................................................891
Checking ................................................757
Preparing and checking
before winter .................................... 376
Engine coolant temperature
gauge ....................................................... 192
Engine immobilizer system ................. 119 Engine oil
Capacity ................................................ 889
Checking ...............................................753
Preparing and checking
before winter .................................... 376
Engine switch ........................................... 177
Event data recorder ............................... 25
First-aid kit holder................................... 717
Floor mats ..................................................714
Fluid
Brake ....................................................... 894
Power steering ................................... 894
Washer ...................................................765
Fog lights
Replacing light bulbs .........................810
Switch.......................................................220
Wattage ................................................. 896
Four-wheel drive system ................... 332
Front passenger occupant
classification system .......................... 140
Front passenger’s seat belt
reminder light......................................829
Front seats
Adjustment ............................................... 67
Driving position memory ..................83
Front turn signal lights
Replacing light bulbs ....................... 807
Wattage ................................................. 896F