2021 LEXUS RX350 fuse

4TABLE OF CONTENTS
6-1. Maintenance and careCleaning and protecting the vehi-cle exterior ................................... 344
Cleaning and protecting the vehi- cle interior .................................... 347
6-2. Maintenance Maintenance requirements ..... 350
General maintenance ................. 351
Emission inspection and mainte- nance (I/M) programs ............ 354
6-3. Do-it-yourself maintenance Do-it-yourself service precautions........................................................... 355
Hood.................................................. 357
Positioning a floor jack............... 357
Engine compartment.................. 359
Tires ................................................... 365
Tire inflation pressure ................. 373
Wheels.............................................. 374
Air conditioning filter..................376
Windshield wiper inserts........... 378
Electronic key battery ................ 379
Checking and replacing fuses ............................................................ 381
Headlight aim................................. 382
Light bulbs ....................................... 384
7-1. Essential information Emergency flashers..................... 394
If your vehicle has to be stopped in an emergency ............................. 394If the vehicle is trapped in rising
water .............................................. 395
7-2. Steps to take in an emergency If your vehicle needs to be towed.......................................................... 397
If you think something is wrong ........................................................... 401
Fuel pump shut off system ........ 402
If a warning light turns on or a warn- ing buzzer sounds..................... 403
If a warning messa ge is displayed
............................................................ 412
If you have a flat tire ..................... 416
If the engine will not start .......... 428
If you lose your keys.................... 430
If the fuel filler door cannot be opened .......................................... 430
If the electronic key does not oper- ate properly ................................... 431
If the vehicle battery is discharged .......................................................... 433
If your vehicle overheats ........... 437
If the vehicle becomes stuck ... 439
8-1. Specifications Maintenance data (fuel, oil level, etc.) .................................................. 442
Fuel information............................ 450
Tire information ............................ 452
8-2. Customization Customizable features ............... 461
8-3. Initialization Items to initialize ........................... 474
6Maintenance and care
7When trouble arises
8Vehicle specifications

343
6
6
Maintenance and care
Maintenance and care
.6-1. Maintenance and careCleaning and protecting the vehi-cle exterior ................................ 344
Cleaning and protecting the vehi- cle interior ................................. 347
6-2. Maintenance Maintenance requirements........................................................ 350
General maintenance .............. 351
Emission inspection and mainte- nance (I/M) programs ......... 354
6-3. Do-it-yourself maintenance Do-it-yourself service precautions........................................................ 355
Hood............................................... 357
Positioning a floor jack............ 357
Engine compartment............... 359
Tires ................................................ 365
Tire inflation pressure .............. 373
Wheels........................................... 374
Air conditioning filter...............376
Windshield wiper inserts........ 378
Electronic key battery ............. 379
Checking and replacing fuses ......................................................... 381
Headlight aim.............................. 382
Light bulbs .................................... 384

3456-1. Maintenance and care
6
Maintenance and care
■Bumpers
Do not scrub with abrasive cleaners.
■Front side windows water-repellent
coating
●The following precautions can extend the
effectiveness of the water-repellent coat-
ing.
• Remove any dirt, etc. from the front side
windows regularly.
• Do not allow dirt and dust to accumulate on the windows for a long period.
Clean the windows with a soft, damp
cloth as soon as possible.
• Do not use wax or glass cleaners that
contain abrasives when cleaning the win-
dows.
• Do not use any metallic objects to
remove condensation build up.
●When the water-repellent performance
has become insufficie nt, the coating can
be repaired. Contact your Lexus dealer.
■Plated portions
If dirt cannot be removed, clean the parts as
follows:
●Use a soft cloth dampened with an
approximately 5% solution of neutral
detergent and water to clean the dirt off.
●Wipe the surface with a dry, soft cloth to
remove any remaining moisture.
●To remove oily deposits, use alcohol wet
wipes or a similar product.
WARNING
■When washing the vehicle
Do not apply water to the inside of the
engine compartment. Doing so may
cause the electrical components, etc. to
catch fire.
■When cleaning the windshield (vehi-
cles with rain-sensing windshield wip-
ers)
Set the wiper switch to off.
If the switch is in “AUTO”, the wipers may
operate unexpectedly in the following sit-
uations, and may result in hands being
caught or other serious injuries and
cause damage to the wiper blades.
Off
AUTO
●When the upper part of the windshield
where the raindrop sensor is located is
touched by hand
●When a wet rag or similar is held close
to the raindrop sensor
●If something bumps against the wind-
shield
●If you directly touch the raindrop sen-
sor body or if something bumps into
the raindrop sensor
■Precautions regarding the exhaust
pipes and rear bumper diffusers
Exhaust gasses cause the exhaust pipes
and rear bumper diffusers to become
quite hot.
When washing the vehicle, be careful not
to touch the pipes and diffusers until they
have cooled sufficiently, as touching hot
exhaust pipes and rear bumper diffusers
can cause burns.
■Precaution regarding the rear
bumper
If the paint of the re ar bumper is chipped
or scratched, the following systems may
not function correctly. If this occurs, con-
sult your Lexus dealer.
A
B

3556-3. 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.363)
•Warm water
• Baking soda
•Grease
• Conventional
wrench (for terminal
clamp bolts)
Brake fluid level
( P.362)
• 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.361)
•“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.359)
•“Toyota Genuine
Motor Oil” or equiv-
alent
• Rag or paper towel
•Funnel (used only for adding engine oil)
Fuses ( P.381)
•Fuse with same
amperage rating as
original
Headlight aim
( P.382)• Phillips-head screw-
driver
ItemsParts and tools

3596-3. Do-it-yourself maintenance
6
Maintenance and care
Washer fluid tank (P.364)
Engine oil filler cap ( P.360)
Engine oil level dipstick ( P.359)
Engine coolant reservoir ( P.361)
Battery ( P.363)
Brake fluid reservoir ( P.362)
Fuse box ( P.381)
Radiator ( P.362)
Condenser ( P.362)
Electric cooling fans
With the engine at operating tempera-
ture and turned off, check the oil level
on the dipstick.
■Checking the engine oil
1 Park the vehicle on level ground.
After warming up the engine and
turning off the engine, wait more
Engine compartment
Components
A
B
C
D
E
F
G
H
I
J
Checking and adding the engine
oil

3816-3. Do-it-yourself maintenance
6
Maintenance and care
1Turn the engine switch off.
2 Open the fuse box cover.
Engine compartment
Push the tab in and lift the lid off.
Driver’s side instrument panel
Remove the lid.
3Remove the fuse with the pullout
tool. Only some fuses can be removed
using the pullout tool.
4 Check if the fuse is blown.
Normal fuse
Blown fuse
Replace the blown fuse with a new fuse of
an appropriate amperage rating. The
amperage rating can be found on the fuse
box lid.
Many types of fuse are used on this vehicle.
This illustration shows a common type of
fuse used on this vehicle.
■After a fuse is replaced
●If the lights do not turn on even after the
fuse has been replaced, a bulb may need
replacement. ( P.384)
●If the replaced fuse blows again, have the
vehicle inspected by your Lexus dealer.
■If there is an overload in a circuit
The fuses are designed to blow, protecting
the wiring harness from damage.
Checking and replacing
fuses
If any of the electrical components
do not operate, a fuse may have
blown. If this happens, check and
replace the fuses as necessary.
Checking and replacing fuses
A
B

3826-3. Do-it-yourself maintenance
■When replacing light bulbs
Lexus recommends that you use genuine
Lexus products designed for this vehicle.
Because certain bulbs are connected to cir-
cuits designed to prevent overload,
non-genuine parts or parts not designed for
this vehicle may be unusable.
Vehicles without single-beam head-
lights
Adjustment bolt A
Adjustment bolt B
Vehicles with single-beam head-
lightsAdjustment bolt A
Adjustment bolt B
1 Make sure the vehicle has a full
tank of gasoline and the area
around the headlight is not
deformed.
WARNING
■To prevent system breakdowns and
vehicle fire
Observe the following precautions.
Failure to do so may cause damage to
the vehicle, and possibly a fire or injury.
●Never use a fuse of a higher amperage
rating than that indicated, or use any
other object in place of a fuse.
●Always use a genuine Lexus fuse or
equivalent.
Never replace a fuse with a wire, even
as a temporary fix.
●Do not modify the fuses or fuse boxes.
NOTICE
■Before replacing fuses
Have the cause of electrical overload
determined and repaired by your Lexus
dealer as soon as possible.
Headlight aim
Vertical movement adjusting
bolts
Before checking the headlight
aim
A
B
A
B

4297-2. Steps to take in an emergency
7
When trouble arises
The engine starting system may be
malfunctioning due to an electrical
problem such as electronic key battery
depletion or a blown fuse. However, an
interim measure is available to start the
engine. (P.429)
One of the following may be the cause
of the problem:
 One or both of the battery terminals
may be disconnected. ( P.363)
 The battery may be discharged.
( P.433)
 There may be a malfunction in the
steering lock system.
Contact your Lexus dealer if the problem
cannot be repaired, or if repair procedures
are unknown.
When the engine does not start, the
following steps can be used as an
interim measure to start the engine if
the engine switch is functioning nor-
mally.
Do not use this starting procedure
except in cases of emergency.
1 Turn the engine switch to IGNI-
TION ON mode and check that the parking brake is set. (
P.177,
183)
2 Shift the shift lever to P.
3 Turn the engine switch to ACCES-
SORY mode.
4 Press and hold the engine switch
for about 15 seconds while
depressing the brake pedal firmly.
Even if the engine can be started using
the above steps, the system may be
malfunctioning. Have the vehicle
inspected by your Lexus dealer.
The starter motor does not turn
over
The starter motor does not turn
over, the interior lights and head-
lights do not turn on, or the horn
does not sound.
Starting the engine in an emer-
gency