2023 TOYOTA HIGHLANDER check engine light

1784-1. Before driving
WARNING
■If you hear a squealing or
scraping noise (brake pad
wear limit indicators)
Have the brake pads checked and
replaced by your Toyota dealer as
soon as possible.Rotor damage
may result if th e pads are not
replaced when needed.
It is dangerous to drive the vehicle
when the wear limits of the brake
pads and/or those of the brake
discs are exceeded.
■When the vehicle is stopped
●Do not race the engine.If the
shift lever is in any position
other than P or N, the vehicle
may accelerate suddenly and
unexpectedly, causing an acci-
dent.
●In order to prev ent accidents
due to the vehicle rolling away,
always keep depressing the
brake pedal while the engine is
running, and apply the parking
brake as necessary.
●If the vehicle is stopped on an
incline, in order to prevent acci-
dents caused by the vehicle roll-
ing forward or backward, always
depress the brake pedal and
securely apply the parking
brake as needed.
●Avoid revving or racing the
engine.Running the engine at
high speed while the vehicle is
stopped may cause the exhaust
system to overheat, which could
result in a fire if combustible
material is nearby.
■When the vehicle is parked
●Do not leave glasses, cigarette
lighters, spray cans, or soft
drink cans in the vehicle when it
is in the sun.Doing so may
result in the following:
• Gas may leak from a cigarette lighter or spray can, and may
lead to a fire.
• The temperature inside the vehicle may cause the plastic
lenses and plastic material of
glasses to deform or crack.
• Soft drink cans may fracture, causing the contents to spray
over the interior of the vehicle,
and may also cause a short cir-
cuit in the vehicle’s electrical
components.
●Do not leave cigarette lighters in
the vehicle. If a cigarette lighter
is in a place such as the glove
box or on the floor, it may be lit
accidentally when luggage is
loaded or the se at is adjusted,
causing a fire.
●Do not attach adhesive discs to
the windshield or windows. Do
not place containers such as air
fresheners on the instrument
panel or dashboard. Adhesive
discs or containers may act as
lenses, causing a fire in the
vehicle.
●Do not leave a door or window
open if the curved glass is
coated with a metallized film
such as a silver-colored one.
Reflected sunlight may cause
the glass to act a s a lens, caus-
ing a fire.

1864-1. Before driving
●All trailer lights work as required
by law.
●All lights work each time you con-
nect them.
●The trailer ball is set at the proper
height for the coupler on the
trailer.
●The trailer is level when it is
hitched.
Do not drive if the trailer is not
level, and check for improper
tongue weight, overloading, worn
suspension, or other possible
causes.
●The trailer cargo is securely
loaded.
●The rear view mirrors conform to
all applicable federal, state/provin-
cial or local regu lations. If they do
not, install rear view mirrors
appropriate for towing purposes.
■Break-in schedule
If your vehicle is new or equipped
with any new power train compo-
nents (such as an engine, transaxle,
transfer [AWD models], rear differ-
ential [AWD models] or wheel bear-
ing), Toyota recommends that you
do not tow a trailer until the vehicle
has been driven for over 500 miles
(800 km).
After the vehicle has been driven for
over 500 miles (800 km), you can
start towing. However, for the next
500 miles (800 km), drive the vehi-
cle at a speed of less than 50 mph
(80 km/h) when towing a trailer, and
avoid full throttle acceleration.
■Maintenance
●Retighten the fixing bolts of the
towing ball and bracket after
approximately 600 miles (1000
km) of trailer towing.
■If trailer sway occurs
One or more factors (crosswinds,
passing vehicles, rough roads, etc.)
can adversely affect handling of
your vehicle and trailer, causing
instability.
●If trailer swaying occurs:
• Firmly grip the steering wheel. Steer straight ahead.
Do not try to contr ol trailer sway-
ing by turning the steering wheel.
• Begin releasing the accelerator
pedal immediately but very gradu-
ally to reduce speed.
Do not increase speed. Do not
apply vehicle brakes.
If you make no extreme correction
with the steering or brakes, your
vehicle and trailer should stabilize.
(if enabled, Trailer Sway Control can
also help to stabilize the vehicle and
trailer.)
●After the trailer swaying has
stopped:
• Stop in a safe place. Get all occu-
pants out of the vehicle.
• Check the tires of the vehicle and the trailer.
• Check the load in the trailer. Make sure the load has not
shifted.
Make sure the tongue weight is
appropriate, if possible.
• Check the load in the vehicle.
Make sure the vehicle is not over-
loaded after occupants get in.
If you cannot find any problems, the
speed at which trailer swaying
occurred is beyond the limit of your
particular vehicle-trailer combina-
tion. Drive at a lower speed to pre-
vent instability. Remember that
swaying of the towing vehicle-trailer
increases as speed increases.

1984-2. Driving procedures
■Customization
If the smart key system has been
deactivated in a customized setting,
refer to P.463.
1 Stop the vehicle completely.
2 Set the parking brake
( P.205), and shift the shift
lever to P.
Check the parking brake indicator
is illuminated.
3 Press the engine switch.
The engine will stop, and the meter
display will be extinguished.
4Release the brake pedal and
check that “ACCESSORY” or
“IGNITION ON” is not shown
on the multi-information dis-
play.
■Automatic engine shut off fea-
ture
●The vehicle is equipped with a
feature that automatically shuts off
the engine when the shift lever is
in P with the engine running for an
extended period.
●The engine will automatically shut
off after approxima tely 1 hour if it
has been left running while the
shift lever is in P.
●The timer for the automatic engine
shut off feature will reset if the
brake pedal is depressed or if the
shift lever is in a position other
than P.
●After the vehicle is parked, if the
door is locked with the door lock
switch ( P.118) from the inside or
the mechanical k ey from the out-
side, the automatic engine shut off
feature will be disab led. The timer
for the automatic engine shut off
feature will be re-enabled if the
driver’s door is opened.
■When the engine is stopped
Even if the engine switch is turned
off, the cooling fan may continue to
operate for a short time.
WARNING
■When starting the engine
Always start the e ngine while sit-
ting in the driver’s seat. Do not
depress the accelerator pedal
while starting the engine under
any circumstances.
Doing so may cause an accident
resulting in death or serious injury.
NOTICE
■When starting the engine
●Do not race a cold engine.
●If the engine becomes difficult to
start or stalls frequently, have
your vehicle checked by your
Toyota dealer immediately.
■Symptoms indicating a mal-
function with the engine
switch
If the engine switch seems to be
operating somewh at differently
than usual, such as the switch
sticking slightly, there may be a
malfunction. Contact your Toyota
dealer immediately.
Stopping the engine

2044-2. Driving procedures
1Right turn
2 Lane change to the right
(move the lever partway and
release it)
The right hand signals will flash 3
times.
3Lane change to the left
(move the lever partway and
release it)
The left hand signals will flash 3
times.
4Left turn
■Turn signals can be operated
when
The engine switch is in ON.
■If the indicator flashes faster
than usual
Check that a light bulb in the front or
rear turn signal lights has not burned out.
Tur n signal lever
Operating instructions

2184-3. Operating the lights and wipers
the sensor sensitivity can be
adjusted by turning the switch
ring.
6Increases the sensitivity
7 Decreases the sensitivity
8 Washer/wiper dual
operation
Pulling the lever o perates the wip-
ers and washer.
The wipers will au tomatically oper-
ate a couple of times after the
washer squirts.
■The windshield wipers and
washer can be operated when
The engine switch is in ON.
■Dripping prevention wiper
sweep
After washing and wiping operation
several times, the wipers operate
one more time after a short delay to
prevent dripping. However, this
function will not operate while driv-
ing.
■Effects of vehicle speed on
wiper operation
Vehicle speed affects the intermit-
tent wiper interval.
■Raindrop sensor (vehicles with
rain-sensing windshield wipers)
●The raindrop sensor judges the
amount of raindrops.
An optical sensor is adopted. It
may not operate properly when
sunlight from the rising or setting
of the sun intermittently strikes the
windshield, or if bugs, etc. are
present on the windshield
●If the wiper switch i s turned to the
“AUTO” position while the engine
switch is in ON, the wipers will
operate once to show that AUTO
mode is activated.
●When the sensor sensitivity ring is
turned toward high while in
“AUTO” position, the wipers will
operate once to indicate that the
sensor sensitivity is enhanced.
●If the temperature of the raindrop
sensor is 185°F (85°C) or higher,
or 5°F (-15°C) or lower, automatic
operation may not occur. In this
case, operate the wipers in any
mode other than AUTO mode.
■If no windshield washer fluid
sprays
Check that the washer nozzles are
not blocked, if there is washer fluid
in the washer fluid tank.
■Front door opening linked wind-
shield wiper stop function
(vehicles with rain-sensing
windshield wipers)
When “AUTO” is selected and the

2204-3. Operating the lights and wipers
4 Washer/wiper dual
operation
Pushing the lever operates the
wiper and washer.
The wiper will automatically operate
a couple of times after the washer
squirts.
The washer will automatically oper-
ate and clean the camera for the
Digital Rearview Mirror
*1 (  P.155)
and rear camera
*2.
*1: If equipped
*2: Refer to “MULTIMEDIA OWNER’S MANUAL”.
■The rear window wiper and
washer can be operated when
The engine switch is in ON.
■If no washer fluid sprays
Check that the washer nozzle is not
blocked if there is washer fluid in the
washer fluid tank.
■Reverse-linked rear window
wiper function
When the shift lever is shifted to R
when the front wipers are operating,
the rear window wiper will operate
once.
■Customization
Setting of the reverse-linked func-
tion can be changed. ( P.494)
NOTICE
■When the washer fluid tank is
empty
Do not operate the switch continu-
ally as the washer fluid pump may
overheat.

3565-4. Using the other interior features
Second seats (8-seat models)
Pull the armrest down for use.
Second seats (7-seat models)
Pull the armrest down for use.
NOTICE
• A metal accessory
• A case or cover made of metal
• A case which ha s magnet in it
on the charging side of the por-
table device
●Electric wave type wireless
remote controls are being used
nearby
●The electronic key is not inside
the vehicle
●2 or more portable devices are
placed on the charging tray at
the same time
If charging is abnormal or the
operation indicator light contin-
ues to flash for any other reason,
the wireless charger may be mal-
functioning. Contact your Toyota
dealer.
■To prevent malfunctions and
data corruptions
●When charging, bringing a
credit, or other magnetic card,
or magnetic storage media
close to the charge area may
clear any stored data due to
magnetic influence. Also, do not
bring a wristwatch or other pre-
cision instrument close to the
charge area since doing so may
cause it to malfunction.
●Do not charge with a non-con-
tact IC card such as a transpor-
tation system IC card inserted
between the charging side of a
portable device and the charge
area. The IC chip may become
extremely hot and damage the
portable device or IC card. Be
especially careful not to charge
a portable device inside a case
or cover with a non-contact IC
card attached.
●Do not leave portable devices
inside the vehicle. The inside of
the vehicle can become hot in
extreme heat, which could
cause a malfunction.
■If the smartphone OS has
been updated
If the smartphone OS has been
updated to a newer version, its
charging specifications may have
changed significantly.
For details, check the information
on the manufacturer’s website.
■To prevent battery discharge
Do not use the wireless charger
for a long period of time with the
engine is stopped.
Armrest

369
6
6
Maintenance and care
Maintenance and care
.6-1. Maintenance and careCleaning and protecting the vehicle exterior .......... 370
Cleaning and protecting the vehicle interior ........... 373
6-2. Maintenance Maintenance requirements.................................. 376
General maintenance.. 378
Emission inspection and maintenance (I/M) pro-
grams ........................ 380
6-3. Do-it-yourself mainte- nance
Do-it-yourself service pre- cautions ..................... 382
Hood ........................... 384
Positioning a floor jack .................................. 385
Engine compartment ... 386
Tires ............................ 393
Tire inflation pressure.. 405
Wheels ......... ...............407
Air conditioning filter .... 408
Electronic key battery.. 410
Checking and replacing fuses.......................... 412
Headlight aim .............. 414
Light bulbs................... 415