engine coolant LEXUS RX350 2022 Owners Manual

712-1. Instrument cluster
2
Vehicle status information and indicators
Warning lights inform the driver of mal-
functions in the indicated vehicle’s sys-
tems.
Warning lights
(U.S.A.)
Brake system warning light*1
( P.393)
(red)
(Canada)
Brake system warning light*1
( P.393)
(yellow)
Brake system warning light*1
( P.393)
High coolant temperature
warning light
*2 ( P.393)
Charging system warning
light
*3 (  P.394)
Low engine oil pressure warn-
ing light
*2 (  P.394)
(U.S.A.)
Malfunction indicator lamp*1
( P.394)
(Canada)
Malfunction indicator lamp*1
( P.394)
SRS warning light
*1 ( P.394)
(U.S.A.)
ABS warning light*1 ( P.395)
(Canada)
ABS warning light*1 ( P.395)
Brake Override System warn-
ing light/Drive-Start Control
warning light
*2 ( P.395)
(red)
Electric power st eering system
warning light
*1 (  P.395)
(yellow)
Electric power steering system
warning light
*1 (P.395)
Low fuel level warning light
( P.396)
Driver’s and front passenger’s
seat belt reminder light
( P.396)
(RX350)
Rear passengers’ seat
belt reminder light
*4
( P.396)
(RX350L)
Rear passengers’ seat
belt reminder
light
*4(P.396)
Tire pressure warning light
*1
( P.397)
(orange)
LTA indicator ( P.397)
(flashes)
Intuitive parking assist OFF indi-
cator
*1 (if equipped) (P.397)
(flashes)
RCTA OFF indicator*1 (if
equipped) ( P.397)
(flashes)
PKSB OFF indicator*1 (if
equipped) ( P.398)
(flashes or
illuminates)PCS warning light*1 (  P.398)
Slip indicator
*1 ( P.398)
(flashes)
(U.S.A.)
Parking brake indicator
( P.399)
(flashes)
(Canada)
Parking brake indicator
( P.399)

752-1. Instrument cluster
2
Vehicle status information and indicators
■Locations of gauges and meters
Except F SPORT models
The units used on the meters may differ depending on the target region.
Engine coolant temperature gauge
Displays the engine coolant temperature
Tachometer
Displays the engine speed in revolutions per minute
Outside temperature
Displays the outside temperature within the range of -40°F (-40°C) to 122°F (50°C). Low
outside temperature indicator comes on when the ambient temperature is 37°F (3°C) or
lower.
Multi-information display
Presents the driver with a variety of vehicle data (P.79)
Displays warning messages in case of a malfunction (P.402)
Clock
Time displayed is linked to the analog clock on the instrument panel. (P.323)
Speedometer
Fuel gauge
Displays the quantity of fuel remaining in the tank
Shift position display ( P.174)
Gauges and meters
Meter display
A
B
C
D
E
F
G
H

762-1. Instrument cluster
Odometer and trip meter display (P.78)
F SPORT models
The units used on the meters may differ depending on the target region.
Outside temperature
Displays the outside temperature within the range of -40°F (-40°C) to 122°F (50°C). Low
outside temperature indicator comes on when the ambient temperature is 37°F (3°C) or
lower.
Multi-information display
Presents the driver with a variety of vehicle data ( P.79)
Displays warning messages in case of a malfunction (P.402)
Tachometer
Displays the engine speed in revolutions per minute
When sport mode is se lected for the driving mode, the periphery of the tachometer will
change color and the scale of the tachometer will be emphasized.
Speedometer
Engine coolant temperature gauge
Displays the engine coolant temperature
Fuel gauge
Displays the quantity of fuel remaining in the tank
Shift position display ( P.174)
Odometer and trip meter display ( P.78)
Clock
Time displayed is linked to the analog clock on the instrument panel. (P.323)
■Rev indicator (F SPORT models) When the engine speed reaches a set
I
A
B
C
D
E
F
G
H
I

772-1. Instrument cluster
2
Vehicle status information and indicators
speed, a ring-shaped indicator will be
displayed on the tachometer.
The desired engine speed at which the Rev
indicator will begin to be displayed can be
set on of the multi-information display.
(  P.79)
■Rev peak (F SPORT models)
The engine speed reaches or exceeds
5000 rpm, an afterimage of the
tachometer will be displayed at the
highest engine speed for approxi-
mately 1 second.
■The meters and display illuminate when
The engine switch is in IGNITION ON
mode.
■Outside temperature display
●In the following situations, the correct
outside temperature may not be dis-
played, 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
a garage, tunnel, etc.)
●When “--” or “E” is displayed, the system
may be malfunctioning
. Take your vehicle
to your Lexus dealer.
■Liquid crystal display
Small spots or light sp ots may appear on the
display. This phenomenon is characteristic
of liquid crystal disp lays, and there is no
problem continuing to use the display.
■Customization
The gauges and meters can be customized
on of the multi-in formation display.
( P.83)
WARNING
■The information display at low tem-
peratures
Allow the interior of the vehicle to warm
up before using the liquid crystal infor-
mation display. At extremely low tem-
peratures, the information display
monitor may respond slowly, and display
changes may be delayed.
For example, there is a lag between the
driver’s shifting and the new gear number
appearing on the display. This lag could
cause the driver to downshift again,
causing rapid and excessive engine brak-
ing and possibly an accident resulting in
death or injury.
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, imme-
diately stop the vehicle in a safe place,
and check the engine after it has
cooled completely. ( P.426)

1684-1. Before driving
mance when using engine braking,
do not put the transmission in D. If in
the M mode, the transmission shift
range position must be in 6 or lower.
( P.174)
 Instability happens more frequently
when descending steep or long
downhill grades. Before descend-
ing, slow down and downshift. Do
not make sudden downshifts while
descending 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 trailer,
your vehicle’s engine may overheat
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.426)
 Always place wheel blocks under
both the vehicle’s and the trailer’s
wheels when parking. Put the trans-
mission in P and apply the parking
brake. Avoid parking on a slope, but
if unavoidable, do so only after per-
forming the following:
1 Apply the brakes and keep them
applied. 2
Have someone place wheel blocks
under both the vehicle’s and trailer’s
wheels.
3 When the wheel blocks are in
place, release the brakes slowly
until the blocks absorb the load.
4 Shift into P and apply the parking
brake.
5 Turn off the engine.
 When restarting after parking on a
slope:
1 With the transmission in P, start the
engine. Be sure to keep the brake
pedal depressed.
2 Shift into a forward gear. If revers-
ing, shift into R.
3 If the parking brake is in manual
mode, release the parking brake.
( P.179)
4 Release the brake pedal, and slowly
pull or back away from the wheel
blocks. Stop and apply the brakes.
5 Have someone retrieve the blocks.

1774-2. Driving procedures
4
Driving
■Shift ranges and their functions
A lower shift range will provide greater
engine braking forces than a higher shift
range.
■Automatic deactivation of shift range
selection in the D position
Shift range selection in the D position will
be deactivated in the following situations:
●When the vehicle comes to a stop
●If the accelerator pedal is depressed for
more than a certain period of time
●When the shift lever is shifted to a posi-
tion other than D
●The “+” paddle shift switch is held down
for a period of time
■Downshifting restriction warning
buzzer
To help ensure safety and driving perfor-
mance, downshifting operation may some-
times be restricted. In some circumstances,
downshifting may not be possible even
when the shift lever or paddle shift switch is
operated. (A buzzer will sound twice.)
To enter M mode, shift the shift lever to
M. Gears can then be selected by
operating the shift lever or paddle shift
switches, allowing you to drive in the
gear of your choosing. 1
Upshifting
2 Downshifting
The gear changes once every time the shift
lever or paddle shift switch is operated.
The selected gear, from M1 to M8, will be
fixed and displayed on the meters.
When in the M position, the gear will
not change unless the shift lever or
paddle shift switches are operated.
However, even when in the M position,
the gears will be automatically
changed in the following situation:
 When vehicle speed drops
(downshift only).
 When the automatic transmission
fluid or engine coolant temperature
is low.
 When automatic transmission fluid
temperature is high (upshift only).
 When the needle of the tachometer
is in the red zone (the range which
exceeds the allowable revs of the
Meter dis-
playFunction
D2 - D8
A gear in the range between
1 and the selected gear is
automatically chosen
depending on vehicle speed
and driving conditions
D1Setting the gear at 1
Selecting gears in the M position

2714-6. Driving tips
4
Driving
4-6.Driving tips
Use fluids that are appropriate to
the prevailing outside temperatures.
•Engine oil
• Engine coolant
•Washer fluid
Have a service technician inspect
the condition of the battery.
 Have the vehicle fitted with four
snow tires or purchase a set of tire
chains for the front tires.
Ensure that all tires ar e of the specified size
and the same brand, and that chains match
the size of the tires.
Perform the following according to the
driving conditions:
 Do not try to forcibly open a window
or move a wiper that is frozen. Pour
warm water over the frozen area to
melt the ice. Wipe away the water
Winter driving tips
Carry out the necessary prepara-
tions and inspections before driving
the vehicle in winter. Always drive
the vehicle in a manner appropriate
to the prevailing weather condi-
tions.
Pre-winter preparations
WARNING
■Driving with snow tires
Observe the following precautions to
reduce the risk of accidents.
Failure to do so may result in a loss of
vehicle control and cause death or seri-
ous injury.
●Use tires of the specified size.
●Maintain the recommended level of air
pressure.
●Do not drive in excess of 75 mph (120
km/h), regardless of the type of snow
tires being used.
●Use snow tires on all, not just some
wheels.
■Driving with tire chains
Observe the following precautions to
reduce the risk of accidents.
Failure to do so may result in the vehicle
being unable to be driven safely, and may
cause death or serious injury.
●Do not drive in excess of the speed
limit specified for the tire chains being
used, or 30 mph (50 km/h), which-
ever is lower.
●Avoid driving on bumpy road surfaces
or over potholes.
●Avoid sudden acceleration, abrupt
steering, sudden braking and shifting
operations that cause sudden engine
braking.
●Slow down sufficiently before entering
a curve to ensure that vehicle control is
maintained.
●Do not use the LTA (Lane Tracing
Assist) system.
NOTICE
■Repairing or replacing snow tires
Request repairs or replacement of snow
tires from your Lexus dealer or legitimate
tire retailers.
This is because the removal and attach-
ment of snow tires affects the operation
of the tire pressure warning valves and
transmitters.
Before driving the vehicle

3436-2. Maintenance
6
Maintenance and care
3Select the “Yes” and press .
4 A message will be displayed on the
multi-information display when the
reset procedure has been completed.
You can perform some maintenance
procedures by yourself.
Please be aware that do-it-yourself
maintenance may affect warranty cov-
erage.
The use of Lexus repair manuals is recom-
mended.
For details about warra nty coverage, refer
to the separate “Owner’s Guide”, “War-
ranty and Service Guide”, “Owner’s Man-
ual Supplement” or “Warranty Booklet”.
Do-it-yourself maintenance
General maintenance
Listed below are the general main-
tenance items that should be per-
formed at the intervals specified in
the “Warranty and Service Guide”
or “Owner’s Manual Supplement”.
It is recommended that any prob-
lem you notice should be brought to
the attention of your Lexus dealer
or qualified service shop for advice.
WARNING
■If the engine is running
Turn the engine off and ensure that there
is adequate ventilation before perform-
ing maintenance checks.
Engine compartment
ItemsCheck points
BatteryCheck the connec-
tions. ( P.355)
Brake fluid
Is the brake fluid at the
correct level?
( P.354)
Engine coolant
Is the engine coolant at
the correct level?
( P.353)
Engine oil
Is the engine oil at the
correct level?
( P.351)
Exhaust system
There should not be
any fumes or strange
sounds.

3476-3. Do-it-yourself maintenance
6
Maintenance and care
6-3.Do-it-yourself maintenance
Do-it-yourself service pre-
cautions
If you perform maintenance by
yourself, be sure to follow the cor-
rect procedure as given in these
sections.
Maintenance
ItemsParts and tools
Battery condition
(P.355)
•Warm water
•Baking soda
•Grease
• Conventional
wrench (for terminal
clamp bolts)
Brake fluid level
(P.354)
• FMVSS No.116 DOT
3 or SAE J1703
brake fluid
• Rag or paper towel
• Funnel (used only for adding brake fluid)
Engine coolant
level ( P.353)
• “Toyota Super Long
Life Coolant” or a
similar high quality
ethylene gly-
col-based non-sili-
cate, non-amine,
non-nitrite and
non-borate coolant
with long-life hybrid
organic acid tech-
nology
For the U.S.A.:
“Toyota Super Long
Life Coolant” is
pre-mixed with 50%
coolant and 50%
deionized water.
For Canada:
“Toyota Super Long
Life Coolant” is
pre-mixed with 55%
coolant and 45%
deionized water.
•Funnel (used only for adding engine cool-
ant)
Engine oil level
( P.351)
•“Toyota Genuine
Motor Oil” or equiv-
alent
• Rag or paper towel
•Funnel (used only for adding engine oil)
Fuses ( P.371)
•Fuse with same
amperage rating as
original
Headlight aim
( P.372)• Phillips-head screw-
driver
ItemsParts and tools

3486-3. Do-it-yourself maintenance
Light bulbs
(P.374)
•Bulb with same num-
ber and wattage rat-
ing as original
•Flathead screw- driver
•Wrench
Radiator and con-
denser ( P.354)
Tire inflation pres-
sure (P.363)• Tire pressure gauge
•Compressed air
source
Washer fluid
(P.356)
• Water or washer
fluid containing anti-
freeze (for winter
use)
• Funnel (used only for adding water or
washer fluid)
WARNING
The engine compartment contains many
mechanisms and fluids that may move
suddenly, become hot, or become elec-
trically energized. To avoid death or seri-
ous injury, observe the following
precautions.
■When working on the engine com-
partment
●Keep hands, clothi ng and tools away
from the moving fan and engine drive
belt.
●Be careful not to touch the engine,
radiator, exhaust manifold, etc. right
after driving as they may be hot. Oil
and other fluids may also be hot.
●Do not leave anything that may burn
easily, such as paper and rags, in the
engine compartment.
●Do not smoke, cause sparks or expose
an open flame to fuel or the battery.
Fuel and battery fumes are flammable.
ItemsParts and tools●Be extremely cautious when working
on the battery. It contains poisonous
and corrosive sulfuric acid.
■When working near the electric cool-
ing fan or radiator grille
Be sure the engine switch is off.
With the engine switch in IGNITION
ON mode, the electric cooling fan may
automatically start to run if the air condi-
tioning is on and/or the coolant tempera-
ture is high. ( P.354)
■Safety glasses
Wear safety glasses to prevent flying or
falling material, fluid spray, etc. from get-
ting in your eyes.
NOTICE
■If you remove the air cleaner filter
Driving with the air cleaner filter
removed may cause excessive engine
wear due to dirt in the air.