check engine TOYOTA HIGHLANDER 2023 Owner's Guide

2004-2. Driving procedures
2ACC
Some electrical components such
as the audio system can be used.
“ACCESSORY” will be displayed
on the multi-information display.
3ON
All electrical com ponents can be
used.
“IGNITION ON” will be displayed on
the multi-information display.
*: If the shift lever is in a position other than P when turning off the
engine, the engine switch will be
turned to ACC, not to OFF.
■Auto power off function
If the vehicle is le ft in ACC for more
than 20 minutes or ON (the engine
is not running) for more than an
hour with the shift lever in P, the
engine switch will automatically turn
off. However, this function cannot
entirely prevent battery discharge.
Do not leave the vehicle with the
engine switch in ACC or ON for long
periods of time when the engine is
not running.
If the engine is stopped with the
shift lever in a position other
than P, the engine switch will not
be turned off but instead be
turned to ACC. Perform the fol-
lowing procedure to turn the
switch off:
1 Check that the parking brake
is set.
2 Shift the shift lever to P.
3 Check that “ACCESSORY” is
displayed on the multi-infor-
mation display and press the
engine switch shortly and
firmly.
4 Check that “ACCESSORY”
or “IGNITION ON” on the
multi-information display are
off.
NOTICE
■To prevent battery discharge
●Do not leave the engine switch
in ACC or ON for long periods of
time without the engine running.
●If “ACCESSORY” or “IGNITION
ON” is displayed on the
multi-informatio n display, the
engine switch is not off. Exit the
vehicle after turning the engine
switch off.
When stopping the engine
with the shift lever in a
position other than P
NOTICE
■To prevent battery discharge
Do not stop the engine when the
shift lever is in a position other
than P. If the engine is stopped in
another shift lever position, the
engine switch will not be turned
off but instead be turned to ACC.
If the vehicle is left in ACC, bat-
tery discharge may occur.

2024-2. Driving procedures
: While the engine switch is in
ON and the brake pedal
depressed
*, shift the shift lever
while pushing the shift release
button on the shift knob.
: Shift the shift lever while
pushing the shift release button
on the shift knob.
: Shift the shift lever normally.
When shifting the shift lever
between P and D, make sure that
the vehicle is completely stopped.
*: For the vehicle to be able to be
shifted from P, the brake pedal
must be depresse d before the
shift release button is pushed. If
the shift release button is pushed
first, the shift lock will not be
released.
■Shift lock system
The shift lock system is a system to
prevent accidental operation of the
shift lever in starting.
The shift lever can be shifted from P
only when the engine switch is in ON and the brake pedal is being
depressed.
■If the shift lever cannot be
shifted from P
First, check whether the brake pedal
is being depressed.
If the shift lever cannot be shifted
with your foot on the brake pedal,
there may be a p roblem with the
shift lock system. Have the vehicle
inspected by your Toyota dealer
immediately.
The following steps may be used as
an emergency measure to ensure
that the shift lev er can be shifted.
Releasing the shift lock:
1 Turn the engine switch to ON
and check that the parking brake
is set. ( P.199, 205)
2 Turn the engine switch to off.
3 Depress the brake pedal.
4 Pry the cover up with a flathead
screwdriver or equivalent tool.
To prevent damag e to the cover,
cover the tip of the screwdriver with
a rag.
5 Press and hold the shift lock
override button.
The shift lever can be shifted while
both buttons are pressed.
Shifting the shift lever

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.

3014-5. Using the driving support systems
4
Driving
driving on roads with many curves.
When Sport mode is selected,
Sport mode indicator comes on.
3Eco drive mode
Helps the driver a ccelerate in an
eco-friendly manner and improve
fuel economy through moderate
throttle characteri stics and by con-
trolling the operation of the air con-
ditioning system (heating/cooling).
When Eco drive mode is selected,
Eco drive mode indicator comes
on.
■When changing to a driving
mode other than normal mode
Switches to AWD control suitable for
the selected mode. (for Dynamic
Torque Vectoring AWD vehicles
only)
■Air conditioning system opera-
tion in Eco drive mode
In Eco drive mode, heating/cooling
operations and the fan speed is con-
trolled to improve fuel efficiency.
Perform the following procedures to
increase the air conditioning perfor-
mance.
●Vehicle with 12.3-inch audio sys-
tem screen: Turn eco air condi-
tioning mode off ( P.328)
●Adjust the fan speed ( P.323)
●Cancel Eco drive mode
■Canceling a driving mode
●Sport mode is automatically can-
celed and the driving mode
returns to normal mode when the
engine switch is turned off.
●Normal mode and Eco drive mode
are not canceled until another
driving mode is sel ected. (Even if
the engine switch is turned off,
normal mode and Eco drive mode
will not be automatically can-
celed.)
Multi-terrain Select
(AWD models)
Multi-terrain Select is a sys-
tem that improves drivabil-
ity in off-road situations.
When driving over muddy,
sandy or rough road sur-
faces, the system selects a
suitable driving mode to
switch AWD, brake and
drive force control to per-
form control suitable for the
road condition.
WARNING
■Before using Multi-terrain
Select
Make sure to observe the follow-
ing precautions. Failure to
observe these precautions may
result in an unexp ected accident.
●Check that the Mud & Sand and
Rock & Dirt indicators are illumi-
nated before driving. Multi-ter-
rain Select will not operate
when the indicators are off.
●Do not rely solely upon the
Multi-terrain Select. This func-
tion is not inten ded to expand
the limits of the vehicle. If the
system is continuously used for
a long period of time, the load
on related parts increases and
the system may be unable to
operate normally, which may
lead to an accident. Thoroughly
check the road conditions and
driving route before driving, and
drive with caution.

3064-5. Using the driving support systems
operation. The indicator will flash
during operation, and then go off
when the system is fully off.
■When the downhill assist con-
trol system is operated continu-
ously
This may cause the brake actuator
to overheat. In this case, the down-
hill assist control system will stop
operating, a buzzer will sound and
the downhill assist control system
indicator will start flashing, and
“Traction Control Turned OFF” will
be shown on the multi-information
display. Refrain from using the sys-
tem until the downhill assist control
system indicator stays on and the
message goes off. (The vehicle can
be driven normally during this time.)
■Sounds and vibrations caused
by the downhill assist control
system
●A sound may be heard from the
engine compartment when the
engine is started or just after the
vehicle begins to move. This
sound does not indicate that a
malfunction has occurred in down-
hill assist control system.
●Either of the following conditions
may occur when the downhill
assist control system is operating.
None of these are indicators that a
malfunction has occurred.
• Vibrations may be felt through the
vehicle body and steering.
• A motor sound may be heard after the vehicle comes to a stop.
■System malfunction
In the following ca ses, have your
vehicle checked by your Toyota
dealer.
●The downhill assist control system
indicator does not come on when
the engine switch is turned to ON.
●The downhill assist control system
indicator does not come on when
the downhill assist control switch
is pressed.
●The slip indicator comes on.
WARNING
■The system may not operate
on the following surfaces,
which may lead to an acci-
dent causing death or serious
injury
●Slippery surfaces such as wet
or muddy roads
●Icy surface
●Unpaved roads

3194-6. Driving tips
4
Driving
NOTICE
■To prevent water damage
Take all necessary safety mea-
sures to ensure that water dam-
age to the engine or other
components does not occur.
●Water entering the engine air
intake will cause severe engine
damage.
●Water entering the automatic
transmission will cause deterio-
ration in shift quality, locking up
of your transmission accompa-
nied by vibration, and ultimately
damage.
●Water can wash the grease
from wheel bearings, causing
rusting and premature failure,
and may also enter the differen-
tial, transmission and transfer
case, reducing the gear oil’s
lubricating qualities.
■When you drive through
water
If driving through water, such as
when crossing shallow streams,
first check the depth of the water
and the bottom of the riverbed for
firmness. Drive slowly and avoid
deep water.
■Inspection after off-road driv-
ing
●Sand and mud that has accu-
mulated in bra ke drums and
around brake di scs may affect
braking efficiency and may
damage brake system compo-
nents.
●Always perform a maintenance
inspection aft er each day of
off-road driving that has taken
you through rough terrain, sand,
mud, or water. For scheduled
maintenance information, refer
to the “Scheduled Maintenance
Guide” or “Owner’s Manual
Supplement”.

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