2023 TOYOTA HIGHLANDER fuel pressure

4056-3. Do-it-yourself maintenance
6
Maintenance and care
The recommended cold tire
inflation pressure and tire size
are displayed on the tire and
loading information label.
(P.479)
Tire valve
Tire pressure gauge
1 Remove the tire valve cap. 2
Press the tip of the tire pres-
sure gauge onto the tire
valve.
3 Read the pressure using the
gauge gradations.
4 If the tire inflation pressure is
not at the recommended
level, adjust the pressure.
If you add too much air, press
the center of the valve to
deflate.
5 After completing the tire infla-
tion pressure measurement
and adjustment, apply soapy
water to the valve and check
for leakage.
6 Put the tire valve cap back
on.
■Tire inflation pressure check
interval
You should check ti re inflation pres-
sure every two week s, or at least
once a month. Do not forget to
check the spare.
■Effects of incorrect tire inflation
pressure
Driving with incorrec t tire inflation
pressure may resul t in the following:
●Reduced fuel economy
●Reduced driving comfort and poor
handling
●Reduced tire life due to wear
●Reduced safety
●Damage to the drive train
If a tire needs frequent inflating,
have it checked by your Toyota
dealer.
■Instructions for checking tire
inflation pressure
When checking tire inflation pres-
Tire inflation pressure
Checking the specified
tire inflation pressure
Inspection and adjust-
ment procedure

4397-2. Steps to take in an emergency
7
When trouble arises
ger detection sensor may cause
the warning light to flash and the
warning buzzer to sound even if a
passenger is not sitting in the
seat.
●If a cushion is placed on the seat,
the sensor may not detect a pas-
senger, and the warning light may
not operate properly.
■SRS warning light
This warning light system monitors
the airbag sensor assembly, front
impact sensors, side impact sensors
(front), side impact sensors (front
door), side impact sensors (rear),
driver’s seat position sensor,
driver’s seat belt buckle switch, front
passenger occupant classification
system (ECU and sensors), “PASS
AIR BAG ON” indicator light, “PASS
AIR BAG OFF” indicator light, front
passenger’s seat belt buckle switch,
driver’s seat belt pretensioner, front
passenger’s seat be lt pretensioner
and force limiter, airbags, intercon-
necting wiring and power sources.
(  P.34)
■If the malfunction indicator
lamp comes on while driving
First check the following:
●Is the fuel t ank empty?
If it is, fill the f uel tank immediately.
●Is the fuel tank cap loose?
If it is, tighten it securely.
The light will go o ff after several
driving trips.
If the light does not go off even after
several trips, contact your Toyota
dealer as soon as possible.
■Electric power steering system
warning light (warning buzzer)
When the battery charge becomes
insufficient or the voltage temporar-
ily drops, the electric power steering
system warning light may come on
and the warning buzzer may sound.
■When the tire pressure warning
light comes on
Inspect the tires to check if a tire is
punctured.
If a tire is punctured: P. 4 4 6
If none of the tires are punctured:
Turn the engine switch off then turn
it to ON. Check if the tire pressure
warning light com es on or blinks.
If the tire pressure warning light
blinks for 1 minute then stays on
There may be a malfunction in the
tire pressure warning system. Have
the vehicle inspected by your Toyota
dealer immediately.
If the tire pressur e warning light
comes on
1 After the temperature of the tires
has lowered sufficiently, check
the inflation pressure of each tire
and adjust them to the specified
level.
2 If the warning light does not turn
off even after several minutes
have elapsed, check that the
inflation pressure of each tire is
at the specified level and perform
initialization. ( P.399)
If the warning light d oes not turn off
several minutes af ter the initializa-
tion has been performed, have the
vehicle inspected by your Toyota
dealer immediately.
■The tire pressure warning light
may come on due to natural
causes
The tire pressure warning light may
come on due to natural causes such
as natural air leaks and tire inflation
pressure changes caused by tem-
perature. In this ca se, adjusting the
tire inflation pressure will turn off the
warning ligh t (after a few minutes).
■When a tire is replaced with a
spare tire
Vehicles with a co mpact spare tire:
The compact spare tire is not
equipped with a tire pressure warn-
ing valve and tran smitter. If a tire

4417-2. Steps to take in an emergency
7
When trouble arises
WARNING
■Maintenance of the tires
Each tire, including the spare (if
provided), should be checked
monthly when cold and inflated to
the inflation pressure recom-
mended by the vehicle manufac-
turer on the vehicle placard or tire
inflation pressure label (tire and
load information label). (If your
vehicle has tires of a different size
than the size indicated on the
vehicle placard or tire inflation
pressure label [tire and load infor-
mation label], you should deter-
mine the proper tire inflation
pressure for those tires.)
As an added safe ty feature, your
vehicle has been equipped with a
tire pressure m onitoring system
(TPMS-tire pressure warning sys-
tem) that illuminates a low tire
pressure telltale (tire pressure
warning light) when one or more
of your tires is significantly
under-inflated. Accordingly, when
the low tire pressure telltale (tire
pressure warning light) illumi-
nates, you should stop and check
your tires as soon as possible,
and inflate them to the proper
pressure. Driving on a signifi-
cantly under-inflated tire causes
the tire to overheat and can lead
to tire failure. Under-inflation also
reduces fuel efficiency and tire
tread life, and may affect the vehi-
cle’s handling and stopping ability.
Please note that the TPMS (tire
pressure warning system) is not a
substitute for pro per tire mainte-
nance, and it is the driver’s
responsibility to maintain correct
tire pressure, even if under-infla-
tion has not reach ed the level to
trigger illumination of the TPMS
low tire pressure telltale (tire pres-
sure warning light).
Your vehicle has also been
equipped with a TPMS (tire pres-
sure warning system) malfunc-
tion indicator to indicate when the
system is not operating properly.
The TPMS (tire pressure warning
system) malfunction indicator is
combined with the low tire pres-
sure telltale (tire pressure warning
light). When the system detects a
malfunction, the te lltale will flash
for approximately one minute and
then remain continuously illumi-
nated. This sequence will con-
tinue upon subsequent vehicle
start-ups as long as the malfunc-
tion exists. When the malfunction
indicator is illuminated, the sys-
tem may not be ab le to detect or
signal low tire pressure as
intended.
TPMS (tire pressure warning sys-
tem) malfunctions may occur for a
variety of reasons, including the
installation of replacement or
alternate tires or wheels on the
vehicle that prevent the TPMS
(tire pressure warning system)
from functioning properly. Always
check the TPMS (tire pressure
warning system) malfunction tell-
tale after replacing one or more
tires or wheels on your vehicle to
ensure that the replacement or
alternate tires and wheels allow
the TPMS (tire pressure warning
system) to continue to function
properly.
NOTICE
■To ensure the tire pressure
warning system operates
properly
Do not install tires with different
specifications or makers, as the
tire pressure warning system may
not operate properly.

4627-2. Steps to take in an emergency
If the fuel filler door opener
switch cannot be operated,
remove the cover inside the
luggage compartment and
pull the lever to open the fuel
filler door.
If the fuel filler door
cannot be opened
If the fuel filler door opener
switch cannot be operated,
contact your Toyota dealer
to service the vehicle. In
case where refueling is
urgently necessary, the fol-
lowing procedure can be
used to open the fuel filler
door.
Opening the fuel filler
door
NOTICE
■When opening the fuel filler
door manually
●Do not open the fuel filler door
manually except in an emer-
gency. Fuel may overflow.
●Using the lever to open the fuel
filler door may not allow for an
adequate reduction in fuel tank
pressure before refueling. To
prevent fuel from spilling out,
turn the cap slowly when remov-
ing it.
●During refueling, fuel may spill
out from the filler opening due to
air being discharged from inside
the fuel tank. The refore, fill the
fuel tank carefully and slowly.

4888-1. Specifications
Grade C corresponds to a level of
performance which all passenger
car tires must meet under the Fed-
eral Motor Vehicle Safety Standard
No. 109.
Grades B and A represent higher
levels of performance on the labo-
ratory test wheel than the minimum
required by law. Warning: The temperature grades
of a tire assume tha
t it is properly
inflated and not overloaded.
Excessive speed, underinflation, or
excessive loading, either sepa-
rately or in combination, can cause
heat buildup and possible tire fail-
ure.
Glossary of tire terminology
Tire related termMeaning
Cold tire infl ation pressure
Tire pressure when the vehicle has been
parked for three hours or more, or has not
been driven more than 1 mile or 1.5 km
under that condition
Maximum inflation pressure
The maximum cold inf lated pressure to
which a tire may be inflated, shown on the
sidewall of the tire
Recommended inflation pres-
sureCold tire inflation pressure recommended
by a manufacturer
Accessory weight
The combined weight (in excess of those
standard items which may be replaced) of
automatic transmission, power steering,
power brakes, power windows, power
seats, radio and heater, to the extent that
these items are available as fac-
tory-installed equipment (whether installed
or not)
Curb weight
The weight of a motor vehicle with stan-
dard equipment, including the maximum
capacity of fuel, oil and coolant, and if so
equipped, air conditioning and additional
weight optional engine

528Alphabetical Index
Electric Power Steering (EPS)............................................... 307Warning light ........................ 433
Electronic key ......................... 112 Battery-saving function......... 132
If the electronic key does not operate properly ................. 463
Replacing the battery ........... 410
Electronic roof sunshade Jam protection function ........ 169
Operation ............................. 168
Emergency flashers ............... 424
Emergency, in case of If a warning buzzer sounds .. 431
If a warning light turns on ..... 431
If a warning message is dis-played................................. 442
If the battery is discharged ... 465
If the electronic key does not operate properly ................. 463
If the engin e will not start ..... 460
If the fuel filler door cannot be opened ............................... 462
If the vehicle is submerged or water on the road is rising .. 425
If you have a flat tire ............. 446
If you lose your keys ............ 461
If you think something is wrong ........................................... 429
If your vehicle becomes stuck ........................................... 471
If your vehicle has to be stopped in an emergency................. 424
If your vehicle needs to be towed ........................................... 427
If your vehicle overheats ...... 469
Engine ACCESSORY mode ............. 199
Compartment ....................... 386
Engine switch ....................... 197
Fuel pump shut off system ... 430
Hood..................................... 384 How to start the engine ........197
Identification number ............475
If the engine will not start......460
If your vehicle has to be stopped
in an emergency .................424
Ignition switch (engine switch) ...........................................197
Overheating ..........................469
Tachometer.......................79, 82
Engine coolant Capacity ...............................477
Checking ..............................389
Preparing and checking before winter ..................................314
Engine coolant temperature gauge .................................79, 82
Engine immobilizer system .....69
Engine oil Capacity ...............................476
Checking ..............................386
Preparing and checking before winter ..................................314
Warning light.........................432
Engine oil maintenance data .388
Engine switch .........................197 Auto power off fun ction .........200
Changing the engine switch modes.................................199
If your vehicle has to be stopped in an emergency .................424
EPS (Electric Po wer Steering)
...............................................307 Warning light.........................433
Event data recorder (EDR) .........7
F
Flat tire Tire pressure w arning system
...........................................396
Vehicles with a spare tire......446
Floor mats .................................24

531Alphabetical Index
Replacing light bulbs ............ 415
Light bulbs Replacing ............................. 415
Lights Automatic High Beam system........................................... 213
Fog light switch .................... 216
Front interior lights ............... 338
Front personal lights............. 338
Headlight switch ................... 210
Interior lights......................... 337
Interior lights list ................... 337
Rear interior lights ................ 338
Rear personal lights ............. 338
Replacing light bulbs ............ 415
Turn signal lever ................... 204
Vanity lights .......................... 359
Welcome light illumination con- trol ...................................... 211
LTA (Lane Tracing Assist) Operation ............................. 239
Warning messages............... 249
Luggage cover........ ................ 345
M
Maintenance
Do-it-yourself maintenance .. 382
General maintenance ........... 378
Maintenance data................. 474
Maintenance requirements... 376
Malfunction indicator lamp.... 432
Menu icons ............................... 87
Meter Clock .......................... 79, 81, 82
Indicators................................ 76
Instrument panel light control81, 86
Meter control switches ..... 87, 97
Meters .............................. 79, 82
Multi-information display .. 87, 96
Settings .......................... 92, 102
Warning lights....................... 431 Warning message.................442
Mirrors Digital Rearview Mirror .........150
Inside rear view mirror ..........149
Outside rear view mirror defog-gers ....................................324
Outside rear view mirrors .....160
Vanity mirrors........................359
Moon roof Door lock linked moon roof oper-ation....................................165
Jam protection function ........165
Operation..............................165
Mud & Sand mode ..................301
Multi-information display Audio system-linked display .91, 100
AWD Control...........................91
Clock ......................................86
Driving information display .....88
Driving support system ...........91
Driving support system informa- tion display .............90, 98, 100
Dynamic radar cruise control with full-speed range ..........249
Eco Driving Indicator ..............89
Fuel economy ...................88, 99
LTA (Lane Tracing Assist) .....245
Menu icons .............................87
Meter control switches......87, 97
Navigation system-linked display ...............................90, 98, 100
Pop-up display........................87
Settings ..........................92, 102
Suggestion function ........95, 101
Tire pressure ...... ............91, 396
Vehicle information display .....91
Warning message...........95, 442
Multi-terrain Select .................301

537Alphabetical Index
RCTA (Rear Cross Traffic Alert)........................................... 436
Seat belt ....................... 434, 435
Warning lights ........................ 431 ABS ...................................... 433
Brake hold operated indicator........................................... 438
Brake Override System ........ 433
Brake system ....................... 431
Charging system .................. 432
Drive-Start Control ............... 433
Electric power steering ......... 433
High coolant temperature ..... 431
Intuitive parking assist OFF indi- cator ................................... 436
Low engine oil pressure ....... 432
Low fuel level ....................... 434
LTA indicator ......................... 436
Malfunction indicator lamp ... 432
Parking brake indicator ........ 438
PKSB OFF indicato r ............. 437
Pre-collision system ............. 437
RCTA OFF indicator ............. 436
Seat belt reminder light 434, 435
Slip indicator......................... 438
SRS ...................................... 432
Stop & Start cancel indicator 436
Tire pressure ........................ 435
Warning message..................... 95
Warning messages................. 442
Washer Adding .................................. 392
Preparing and c hecking before
winter.................................. 314
Switch........................... 216, 219
Washing and waxing .............. 370
Weight Cargo capacity ..................... 184
Load limits ............................ 184
Weight .................................. 474
Wheels ..................................... 407 Size ...................................... 479 Window lock switch ...............164
Windows
Power windows ....................162
Rear window defogger .........324
Washer .........................216, 219
Windshield defogger ..............324
Windshield wiper de-icer .......324
Windshield wipers Rain-sensing windshield wipers...................................216, 219
Winter driving tips ..................314
Wireless charger.....................350
Wireless remote control Battery-Saving Function .......132
Locking/Unlocking ................ 113
Replacing the battery ...........410
For infor mation regarding the equipment listed
below, refer to the “MUL-
TIMEDIA OWNER’S MAN-
UAL”.
· Navigation system
· Audio/visual system
· Rear view monitor system
· Toyota parking assist monitor
· Panoramic view monitor