2023 TOYOTA HIGHLANDER HYBRID warning lights

4356-3. Do-it-yourself maintenance
6
Maintenance and care
WARNING
■To prevent injury
Before performing any light bulb
replacement procedure, be sure
to turn the power switch off. Fail-
ure to do so may result in burns
from hot compone nts or a part of
your body may get caught on an
operating component, possibly
causing serious injury.
■Replacing light bulbs
●Turn off the lights. Do not
attempt to replace the bulb
immediately after turning off the
lights.The bulbs become very
hot and may cause burns.
●Do not touch the glass portion
of the light bulb with bare
hands. When it is unavoidable
to hold the glass portion, use
and hold with a clean dry cloth
to avoid getting moisture and
oils on the bulb. Also, if the bulb
is scratched or dropped, it may
blow out or crack.
●Fully install light bulbs and any
parts used to secure them. Fail-
ure to do so may result in heat
damage, fire, or water entering
the light unit. This may damage
the lights or cause condensa-
tion to build up on the lens.
●Do not attempt t o repair or dis-
assemble light bulbs, connec-
tors, electric circuits or
component parts.
Doing so may result in death or
serious injury due to electric
shock.
■To prevent damage or fire
●Make sure bulbs are fully
seated and locked.
●Check the wattage of the bulb
before installing to prevent heat
damage.

4457-2. Steps to take in an emergency
7
When trouble arises
■Brake system warning light
■Brake system warning light
■High coolant temperature warning light* (warning buzzer)
*: This light illuminat es on the multi-information display.
If a war ning light tur ns on or a war ning buzzer
sounds
Calmly perform the following actions if any of the warning
lights comes on or flashes. If a light comes on or flashes, but
then goes off, this does not necessarily indicate a malfunction
in the system. However, if this continues to occur, have the
vehicle inspected by your Toyota dealer.
Actions to the warning lights or warning buzzers
Warning lightDetails/Actions
(U.S.A.)
or
(red)
(Canada)
Indicates that:
 The brake fluid level is low; or
 The brake system is malfunctioning
 Immediately stop the vehicle in a safe place and con-
tact your Toyota dealer. Continuing to drive the vehi-
cle may be dangerous.
Warning lightDetails/Actions
(yellow)
Indicates a malfunction in:
The regenerative braking system;
 The electronically contr olled brake system; or
 The electric parking brake
 Have the vehicle inspected by your Toyota dealer
immediately.
Warning lightDetails/Actions
Indicates that the engine coolant temperature is too high
Immediately stop the vehicle in a safe place.
Handling method ( P.484)

4547-2. Steps to take in an emergency
light will not turn off even though the
flat tire has been replaced with the
spare tire. Replace the spare tire
with the repaired tire and adjust the
tire inflation pressure. The tire pres-
sure warning light will go off after a
few minutes.
■Conditions that the tire pres-
sure warning system may not
function properly
 P. 4 0 8
WARNING
■If both the ABS and the brake
system warning lights remain
on
Stop your vehicle in a safe place
immediately and contact your Toy-
ota dealer.
The vehicle will become
extremely unstable during brak-
ing, and the ABS system may fail,
which could cause an accident
resulting in death or serious injury.
■When the electric power
steering system warning light
comes on
When the light comes on yellow,
the assist to the power steering is
restricted. When the light comes
on red, the assist to the power
steering is lost and handling oper-
ations of the steering wheel
become extremely heavy.
When steering wheel operations
are heavier than usual, grip the
steering wheel firmly and operate
it using more force than usual.
■If the tire pressure warning
light comes on
Be sure to observe the following
precautions.
Failure to do so could cause a
loss of vehicle control and result
in death or serious injury.
●Stop your vehicle in a safe place
as soon as possible. Adjust the
tire inflation pressure immedi-
ately.
●If the tire pressure warning light
comes on even after tire infla-
tion pressure adjustment, it is
probable that you have a flat
tire. Check the tires. If a tire is
flat, change it with the spare tire
and have the flat tire repaired by
the nearest Toyota dealer.
●Avoid abrupt maneuvering and
braking.
If the vehicle tires deteriorate,
you could lose control of the
steering wheel or the brakes.
■If a blowout or sudden air
leakage should occur
The tire pressure warning system
may not activate immediately.
■Maintenance of the tires
Each tire, includi ng 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.)

4577-2. Steps to take in an emergency
7
When trouble arises
The warning lights and warning buzzers operate as follows depend-
ing on the content of the message. If a message indicates the need
for inspection by a dealer, have the vehicle inspected by your To y o t a
dealer immediately.
*: A buzzer sounds the first time a message is shown on the multi-informa-
tion display.
■Warning messages
The warning messages explained
below may differ from the actual
messages according to operation
conditions and vehicle specifica-
tions.
■Warning buzzer
In some cases, the buzzer may not
be heard due to being in a noisy
location or audio sound.
■If “Engine Oil Level Low Add or
Replace” is displayed
The engine oil level is low. Check
the level of the engine oil, and add if
necessary.
This message may appear if the
vehicle is stopped on a slope. Move
the vehicle to a l evel surface and
check to see if the message disap-
pears.
Messages and warnings
Warning lightWarning
buzzer
*Warning
-Sounds
 Indicates an important situation, such as
when a system relate d to driving is mal-
functioning or that danger may result if
the correction procedure is not per-
formed
 Indicates a situation, such as when dam-
age to the vehicle or danger may result
Comes on or
flashesSounds
Indicates an importan t situation, such as
when the systems shown on the
multi-information display may be malfunc-
tioning
-Does not sound
 Indicates a condition, such as malfunc-
tion of electrical components, their condi-
tion, or indicates the need for
maintenance
 Indicates a situatio n, such as when an
operation has been performed incor-
rectly, or indicates how to perform an
operation correctly

542Alphabetical Index
Back-up lightsReplacing light bulbs ............ 428
Battery (12-volt battery) Battery checking................... 402
If the 12-volt battery is dis-charged .............................. 479
Preparing and c hecking before
winter.................................. 320
Replacing ............................. 482
Warning light ........................ 446
Battery (traction battery) ......... 73
Blind Spot Monitor (BSM) ...... 278
Brake Brake hold ............................ 220
Fluid ............................. 400, 495
Parking brake ....................... 217
Regenerative braking ............. 70
Warning light ........................ 445
Brake assist ............................ 311
Break-in tips ........ ................... 185
Brightness control Instrument panel light control89, 96
BSM (Blind Spot Monitor) ...... 278
Buzzer Hands off steering wheel warn-ing (LTA) ............................. 262
C
Care Exterior ................................. 380
Interior .................................. 383
Seat belts ............................. 383
Wheels and wheel ornaments........................................... 380
Cargo capacity ....................... 194
Cargo net hooks .. ................... 350
Chains ..................................... 321
Child restraint system Fixed with a LATCH system ... 60
Fixed with a seat belt ............. 55 Front passenger occupant clas-
sification system ...................43
Points to remember ................50
Riding with children ................49
Types of child restraint system installation method ...............52
Using an anchor bracket ........62
Child safety 12-volt battery precautions .403, 483
Airbag precautions .................39
Back door precautions..........131
Child restraint system .............52
Heated steering wheel and seat heater precautio ns..............341
How your child should wear the seat belt ................................28
Moon roof precautions..........177
Panoramic moon roof precau- tions ....................................181
Power window lock switch ....175
Power window precautions...174
Rear door child-protectors ....130
Seat belt extender precautions .............................................29
Seat belt precautions..............49
Child-protectors......................130
Cleaning Exterior .................................380
Interior ..................................383
Radar sensor ........................238
Seat belts .............................383
Wheels and wheel ornaments...........................................380
Clock ................... .....87, 90, 91, 96
Coat hooks ..............................363
Condenser ............. ..................400
Console box ............................347
Conversation mirror ...............369
Cooling system .......................399 Engine overheating ..............484
Hybrid system overheating ...486

543Alphabetical Index
Cruise controlDynamic radar cruise control with full-speed range .......... 263
Cup holders ............................ 347
Current fuel consumption97, 109
Curtain shield airbags ............. 34
Customizable features ........... 510
D
Daytime running light system223 Replacing light bulbs ............ 428
Defogger Outside rear view mirrors ..... 330
Rear window ........................ 330
Windshield............................ 330
Differential Rear differential oil ............... 494
Digital Rearview Mirror .......... 161
Dimension ............................... 490
Dinghy towing ........................ 206
Display Dynamic radar cruise control with full-speed range .......... 263
Energy monitor ..................... 119
Head-up display ................... 114
Intuitive parking assist .......... 283
LTA (Lane Tracing Assist) ..... 259
Multi-informatio n display 96, 106
RCTA .................................... 291
Warning message ................ 456
Distance until next engine oil change..................................... 89
Do-it-yourself maintenance ... 387
Door courtesy lights .............. 343
Door lock Back door ............................. 131
Side doors ............................ 127
Smart key system................. 142
Wireless remote control ....... 125
Doors Automatic door locking and unlocking system................ 130 Back door .............................131
Door glasses ........................173
Door lock ..............................131
Open door warning buzzer .128,
130
Outside rear view mirrors .....171
Rear door child-protectors ....130
Drive distance .........................101
Drive information ....................101
Driver’s seat position memory Driving position memory .......153
Memory recall function .........155
Driving Break-in tips .........................185
Correct driving posture ...........25
Driving mode select switch ...308
Hybrid vehicle dri ving tips .....318
Procedures ...........................184
Winter drive tips....................320
Driving information display .....97
Driving mode select switch ...308
Driving position memory .......153 Memory recall function .........155
Driving range ....................97, 109
Driving support system informa- tion display............ 100, 108, 111
Dynamic radar cruise control with full-speed range............263Warning message.................273
E
ECB (Electronically Controlled Brake System)....................... 311
ECO Accelerator Guidance....99, 11 0
Eco drive mode .......................308
Eco score .......................... 99, 110
EDR (Event data recorder) .........7
E-Four ......................................312
Elapsed time ...........................101
Electric motor (t raction motor)69

545Alphabetical Index
F
Flat tireTire pressure warning system........................................... 407
Vehicles with a spare tire ..... 461
Floor mats ................................. 24
Fluid Brake .................................... 495
Hybrid transmission.............. 494
Washer ................................. 401
Fog lights Switch................................... 229
Footwell light .................... ...... 343
Front passenger occupant clas- sification system .................... 43
Front seats Adjustment ........................... 147
Cleaning ............................... 383
Correct driving posture ........... 25
Driving position memory....... 153
Head restraints ..................... 156
Memory recall function ......... 155
Seat heaters ......................... 341
Seat position memory .......... 153
Seat ventilators .................... 341
Front side marker light Light switch .......................... 223
Front side marker lights Replacing light bulbs ............ 428
Front turn signal lights Replacing light bulbs ............ 428
Turn signal lever ................... 216
Fuel Capacity ............................... 491
Fuel gauge ....................... 87, 91
Information ........................... 498
Refueling .............................. 234
Type ..................................... 491
Warning light ........................ 448
Fuel consumption Average fuel economy ... 97, 109 Current fuel consumption97, 109
Fuel economy ...................97, 109
Fuel filler door If the fuel filler door cannot be opened ...............................476
Refueling ..............................234
Fuel gauge...........................87, 91
Fuses .......................................425
G
Garage door opene r ...............370
Gauges ................................87, 91
Glove box ................................347
Glove box light........................347
H
Head restraints .......................156
Headlight aim ..........................427
Headlights Adaptive Front-lighting System (AFS) ..................................225
Automatic High Beam system ...........................................226
Light switch...........................223
Replacing light bulbs ............428
Head-up display ...................... 114 Driving information display area........................................... 114
Hybrid System Indicator ....... 117
Navigation system-linked display ........................................... 117
Settings ................................ 116
Heated steering wheel............341
Heaters Automatic air conditioning sys-tem .....................................328
Heated steering wheel..........341
Outside rear view mirrors .....330
Rear automatic air conditioning system ................................337
Seat heaters ....... ..................341

546Alphabetical Index
High mounted stoplightReplacing light bulbs ............ 428
High-voltage components ....... 73
Hill-start assist control .......... 311
Hood Open .................................... 394
Hooks Cargo net hooks ................... 350
Coat hooks ........................... 363
Retaining hooks (floor mat) .... 24
Horn ......................................... 159
Hybrid battery (tr action battery)
Location.................................. 73
Specification ......................... 492
Warning message .................. 76
Hybrid battery (traction battery) air vents .................................. 75
Hybrid system .......................... 69 Acoustic vehicle alerting system............................................. 71
Emergency shut off system .... 76
Energy monitor/consumption screen ................................ 119
EV drive mode...................... 211
High voltage components....... 73
Hybrid system precautions ..... 73
If the hybrid sy stem will not start
........................................... 474
Overheating.......................... 486
Power (ignition) switch ......... 207
Regenerative braking ............. 70
Starting the hybrid system.... 207
Hybrid System Indicator ... 88, 94, 11 7
Hybrid transmission .............. 213 S mode ................................. 215
Hybrid vehicle driving tips .... 318
I
I/M test ..................................... 390
Identification Engine .................................. 491 Vehicle ..................................490
Ignition switch (power switch) ...............................................207Auto power off fun ction .........210
Changing the power switch modes.................................209
If your vehicle has to be stopped in an emergency .................438
Immobilizer system ..................77
Indicators ..................................84
Initialization Items to initialize ...................523
Maintenance .................387, 398
Power windows ....................173
Tire pressure w arning system
...........................................409
Inside rear view m irror ...160, 161
Instrument panel light control89, 96
Interior lights...........................343 Front interior light .................343
Rear interior light ..................343
Intuitive parking assist Function................................283
Warning message.................285
J
JackPositioning a floor jack .........395
Vehicle-equipped jack ..........462
Jack handle .............................462
Jam protection function Electronic roof sunshade ......180
Moon roof .............................176
Panoramic moon r oof ...........180
Power back door ..................136
Power windows ....................173
K
Keyless entry Smart key system .................142