2023 TOYOTA HIGHLANDER HYBRID engine overheat

4467-2. Steps to take in an emergency
■Hybrid system overheat warning light*(warning buzzer)
*: This light illuminat es on the multi-information display.
■Charging system warning light*
*: This light illuminates on the multi-information display.
■Low engine oil pressure warning light* (warning buzzer)
*: This light illuminates on the multi-information display.
■Malfunction indicator lamp
Warning lightDetails/Actions
Indicates the hybrid s ystem has overheated
 Stop the vehicle in a safe place.
Handling method ( P.486)
Warning lightDetails/Actions
Indicates a malfunction in the vehicle’s charging system
 Immediately stop the vehicle in a safe place and con-
tact your Toyota dealer.
Warning lightDetails/Actions
Indicates that the engine oil pressure is too low
 Immediately stop the vehicle in a safe place and con-
tact your Toyota dealer.
Warning lightDetails/Actions
(U.S.A.)
or
(Canada)
Indicates a malfunction in:
The hybrid system;
 The electronic engine control system; or
 The electronic thrott le control system;
 Immediately stop the vehicle in a safe place and con-
tact your Toyota dealer.

4597-2. Steps to take in an emergency
7
When trouble arises
resolved. (causes a nd coping meth-
ods: P.240)
■If “Radar Cruise Control
Unavailable” is shown
The dynamic radar cruise control
with full-speed range system cannot
be used temporarily. Use the system
when it becomes available again.
■If a message that indicates the
malfunction of front camera is
displayed
The following sys tems may be sus-
pended until the pr oblem shown in
the message is resolved. ( P.240,
451)
●PCS (Pre-Collision system)
●LTA (Lane Tracing Assist)
●Automatic High Beam
●RSA (Road Sign Assist) (if
equipped)
●Dynamic radar cruise control with
full-speed range
■If a message that indicates the
malfunction of radar sensor is
displayed
The following sys tems may be sus-
pended until the pr oblem shown in
the message is resolved. ( P.240,
451)
●PCS (Pre-Collision system)
●LTA (Lane Tracing Assist)
●Dynamic radar cruise control with
full-speed range
■If “AWD System Overheated
Switching to 2WD Mode” or
“AWD System Overheated 2WD
Mode Engaged” is displayed
This message may be displayed
when driving under extremely high
load conditions.
Drive the vehicle at low speeds and
stop the vehicle in a safe place with
the hybrid system operating until the
message is cleared.
If the message is not cleared, have
the vehicle inspected by your Toyota dealer.
■If “Check Fuel Cap” is dis-
played
The fuel tank cap is not properly
installed. Correctly install the fuel
tank cap.
■If “Maintenance Required
Soon” is displayed
Indicates that all maintenance
according to the driven distance on
the maintenance schedule
* should
be performed soon.
Comes on approximately 4500
miles (7200 km) after the message
has been reset. If necessary, per-
form maintenance. Please reset the
message after the maintenance is
performed. ( P.387)
*: Refer to the separate “Scheduled
Maintenance Guide” or “Owner’s
Manual Supplement” for the main-
tenance interval applicable to your
vehicle.
■If “Maintenance Required Visit
Your Dealer” is displayed
Indicates that all maintenance is
required to correspond to the driven
distance on the maintenance sched-
ule
*.
Comes on approximately 5000
miles (8000 km) after the message
has been reset. (The indicator will
not work properly unless the mes-
sage has been rese t.) Perform the
necessary maintenance. Please
reset the message after the mainte-
nance is performed. ( P.387)
*: Refer to the separate “Scheduled
Maintenance Guide” or “Owner’s
Manual Supplement” for the main-
tenance interval applicable to your
vehicle.
■If “Oil Maintenance Required
Soon” is displayed
Indicates that the engine oil should
be scheduled to be changed.

4847-2. Steps to take in an emergency
If the engine coolant tempera-
ture gauge enters the red
zone or “Engine Coolant
Temp High Stop in a Safe
Place See Owner’s Manual”
is shown on the multi-informa-
tion display
1 Stop the vehicle in a safe
place and turn off the air con-
ditioning system, and then
stop the hybrid system.
2 If you see steam:
Carefully lift the hood after
NOTICE
■When handling jumper cables
When connecting the jumper
cables, ensure that they do not
become entangled in the cooling
fan or belt.
■To prevent damaging the
vehicle
The exclusive jump starting termi-
nal is to be used when charging
the 12-volt battery from another
vehicle in an emergency. It cannot
be used to jump start another
vehicle.
If your vehicle over-
heats
The following may indicate
that your vehicle is over-
heating.
 The needle of the engine
coolant temperature gauge
( P.87) enters the red zone
or a loss of hybrid system
power is experienced. (For
example, the vehicle speed
does not increase.)
 “Engine Coolant Temp High
Stop in a Safe Place See
Owner’s Manual” or “Hybrid
System Overheated Output
Power Reduced” is shown
on the multi-information dis-
p l a y.
 Steam comes out from
under the hood.
Correction procedures

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

544Alphabetical Index
Electric Power Steering (EPS)............................................... 312Warning light ........................ 448
Electronic key ......................... 124 Battery-saving function......... 143
If the electronic key does not operate properly ................. 477
Replacing the battery ........... 423
Electronic roof sunshade Jam protection function ........ 180
Operation ............................. 179
Electronically Controlled Brake System (ECB) ....................... 311
Emergency flashers ............... 438
Emergency, in case of If a warning buzzer sounds .. 445
If a warning light turns on ..... 445
If a warning message is dis-played................................. 456
If the 12-volt battery is dis- charged .............................. 479
If the electronic key does not operate properly ................. 477
If the fuel filler door cannot be opened ............................... 476
If the hybrid sy stem will not start
........................................... 474
If the vehicle is submerged or water on the road is rising .. 439
If you have a flat tire ............. 461
If you lose your keys ............ 475
If you think something is wrong ........................................... 443
If your vehicle becomes stuck ........................................... 488
If your vehicle has to be stopped in an emergency................. 438
If your vehicle needs to be towed ........................................... 441
If your vehicle overheats ...... 484
Energy monitor ....................... 119 Engine
ACCESSORY mode . ............209
Compartment........................396
Engine switch .......................207
Hood .....................................394
How to start the hybrid system ...........................................207
Identification number ............491
If the hybrid sys tem will not start
...........................................474
If your vehicle has to be stopped in an emergency .................438
Ignition switch (power switch) ...........................................207
Overheating ..........................484
Power switch ........................207
Tachometer.......................87, 91
Engine coolant Capacity ...............................493
Checking ..............................399
Preparing and checking before winter ..................................320
Engine coolant temperature gauge .................................87, 91
Engine oil Capacity ...............................492
Checking ..............................396
Preparing and checking before winter ..................................320
Warning light.........................446
Engine oil maintenance data .398
Engine switch (power switch)207 If your vehicle has to be stopped in an emergency .................438
EPS (Electric Po wer Steering)
...............................................312 Warning light.........................448
EV drive mode......................... 211
EV indicator...............................70
Event data recorder (EDR) .........7

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

548Alphabetical Index
Moon roofDoor lock linked moon roof oper-ation ................................... 176
Jam protection function ........ 176
Operation ............................. 176
Multi-information display Audio system-linked display101, 111
AWD Control ........................ 101
Clock ...................................... 96
Driving informatio n display ..... 97
Driving support system......... 101
Driving support system informa- tion display ......... 100, 108, 111
Dynamic radar cruise control with full-speed range .......... 263
ECO Accelerator Guidance .. 99, 11 0
Eco score ....................... 99, 110
Energy monitor ............. 101, 119
Fuel economy................. 97, 109
LTA (Lane Tracing Assist) ..... 259
Menu icons ............................. 96
Meter control switches ... 97, 107
Navigation system-linked display ........................... 100, 108, 111
Pop-up display ....................... 96
Settings ........................ 102, 112
Suggestion function...... 105, 112
Tire pressure ................ 101, 407
Vehicle information display... 101
Warning message ........ 105, 456
N
Navigation system-linked display ....................... 100, 108, 111, 117
Noise from under vehicle .......... 5
Normal mode .......................... 308
O
“ODO TRIP” switch .................. 89 “ODO” switch............................95
Odometer.............................89, 95
Odometer and trip meter display
Display items ....................89, 95
“ODO TRIP” switch .................89
“ODO” switch ..........................95
Pop-up display........................95
Oil Engine oil..............................492
Rear differential oil................494
Opener Back door .............................133
Fuel filler door.......................234
Hood .....................................394
Outer foot lights Replacing light bulbs ............428
Outside rear view mirrors Adjustment ...........................171
BSM (Blind Sport Monitor) ....278
Folding..................................172
Linked mirror function when reversing.............................171
Mirror position me mory.........153
Outside rear view mirror defog- gers ....................................330
RCTA function.......................291
Outside temperatur e ..........87, 91
Overheating.............................484
P
Panic mode .............................126
Panoramic moon roof Jam protection function ........180
Operation..............................179
Parking assist sens ors (intuitive
parking assist) ......................283
Parking brake Operation..............................217
Parking brake engaged warning buzzer.................................219
Warning light.........................452
Warning message.................219

553Alphabetical Index
TransmissionDriving mode select switch... 308
Hybrid transmission.............. 213
If the shift lever cannot be shifted from P................................. 214
S mode ................................. 215
Trip meters .......................... 89, 95
Turn signal lights Replacing light bulbs ............ 428
Turn signal lever ................... 216
U
USB charging ports................ 355
V
Vanity lights ............................ 369
Vanity mirrors ......................... 369
VDIM (Vehicle Dynamics Inte-grated Management) ............ 312
Vehicle data recording ............... 6
Vehicle Dynamics Integrated Management (VDIM) ............. 312
Vehicle identifi cation number490
Vehicle information display ... 101
Vehicle Stability Control (VSC) ............................................... 311
Ventilators (seat ventilators) . 341
VSC (Vehicle Stability Control) ............................................... 311
W
Warning buzzers ABS ...................................... 447
Airbags ................................. 447
Approach warning ................ 270
Brake hold ............................ 452
Brake Override System ........ 447
Brake system ....................... 445
Charging system .................. 446
Downshifting......................... 216 Drive-Start Control
................447
Electric power steering .........448
Engine ..................................446
Hands off steering wheel warn- ing (LTA) .............................262
High coolant temperature .....445
Hybrid system .......................446
Hybrid system overheat ........446
Intuitive parking assist .288, 290, 450
Low engine oil pressure .......446
LTA (Lane Tracing Assist) ...253, 257, 450
Open door ....................128, 130
PKSB (Parking Support Brake) ...........................................451
Pre-collision braking .............244
RCTA (Rear Cross Traffic Alert) ...........................................450
Seat belt .......................448, 449
Warning label ............................73
Warning lights .........................445 ABS ......................................447
Brake hold operated indicator...........................................452
Brake Override System ........447
Brake system ........................445
Charging system ..................446
Drive-Start Control ................447
Electric power steering .........448
High coolant temperature .....445
Hybrid system overheat warning light .....................................446
Intuitive parking assist OFF indi- cator ...................................450
Low engine oil pressure .......446
Low fuel level........................448
LTA indicator .........................450
Malfunction indica tor lamp ....446
Parking brake indicator.........452
PKSB OFF indicator .............451
Pre-collision syst em .............451