2023 TOYOTA TUNDRA HYBRID engine coolant

5377-2. Steps to take in an emergency
Owners Manual_USA_M0C052_en
7
When trouble arises
6 Start the hybrid system to
check that the radiator cool-
ing fan operates and to check
for coolant leaks from the
radiator or hoses.
7 If the fan is not operating:
Stop the hybrid system
immediately and contact your
Toyota dealer.
If the fan is operating:
Have the vehicle inspected at
the nearest Toyota dealer.
8 Check if “Engine Coolant
Temp High Stop in a Safe
Place See Owner’s Manual”
is shown on the multi-infor-
mation display.
If the message does not disappear:
Stop the hybrid system and contact
your Toyota dealer.
If the message is not displayed:
Have the vehicle i nspected at the
nearest Toyota dealer.
WARNING
■When inspecting under the
hood of your vehicle
Observe the following precau-
tions.
Failure to do so may result in seri-
ous injury such as burns.
●If steam is seen coming from
under the hood, do not open the
hood until the steam has sub-
sided. The engine compart-
ment may be very hot.
●After the hybrid system has
been turned off , check that the
“READY” indicator is off. When
the hybrid system is operating,
the gasoline engine may auto-
matically start, or the cooling fan
may suddenly operate even if
the gasoline engine stops. Do
not touch or approach rotating
parts such as the fan, which
may lead to fingers or clothing
(especially a tie, a scarf or a
muffler) getting caught, resulting
in serious injury.
●Do not loosen the coolant reser-
voir caps, while the hybrid sys-
tem and radiator are hot.
High temperature steam or
coolant could spray out.
NOTICE
■When adding coolant
Add coolant slowly after the
hybrid system has cooled down
sufficiently. Adding cool coolant to
a hot hybrid system too quickly
can cause damage to the hybrid
system.
■To prevent damage to the
cooling system
Observe the following precau-
tions:
●Avoid contaminating the coolant
with foreign matter (such as
sand or dust, etc.,).
●Do not use any coolant additive.

5448-1. Specifications
Owners Manual_USA_M0C052_en
Oil viscosity (0W-20 is explained
here as an example):
• The 0W in 0W-20 indicates the characteristic of the oil
which allows cold startability.
Oils with a lower value before
the W allow for easier starting
of the engine in cold weather.
• The 20 in 0W-20 indicates the viscosity characteristic of the
oil when the oil is at high tem-
perature.
How to read oil container label:
The International Lubricant Specification Advisory Commit-
tee (ILSAC) Certification Mark is
added to some oil containers to
help you select the oil you
should use.
*: The fluid capacity is a reference quantity.
If replacement is necessary, contact your Toyota dealer.
Cooling system
Capacity*
Gasoline
engine13.1 qt. (12.4 L , 10.9 Imp.qt.)
Intercooler4.6 qt. (4.4 L, 3.9 Imp.qt.)
Power con-
trol unit2.2 qt. (2.1 L, 1.8 Imp.qt.)
Coolant type
Use either of the following:
“Toyota Super Long Life Coolant”
 Similar high-quality ethylene glycol-based non-
silicate, non-amine, non- nitrite, and non-borate
coolant with long -life hybrid organic acid tech-
nology
Do not use plain water alone.
Ignition system (spark plug)
MakeDENSO EC22HPR-D7
Gap0.027 in. (0.7 mm)

5558-1. Specifications
Owners Manual_USA_M0C052_en
8
Vehicle specifications
heat buildup and possible tire fail- ure.
Glossary of tire terminology
Tire related termMeaning
Cold tire inflation 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 ava ilable as factory-
installed equipment (whether installed or
not)
Curb weight
The weight of a moto r 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
Maximum loaded vehicle
weight
The sum of:
(a) Curb weight
(b) Accessory weight
(c) Vehicle capacity weight
(d) Production options weight
Normal occupant weight
150 lb. (68 kg) times the number of occu-
pants specified in the second column of
Ta b l e 1
* that follows
Occupant distribution
Distribution of occupants in a vehicle as
specified in the third column of Table 1
*
below

Owners Manual_USA_M0C052_en
Alphabetical Index595
Seat belt extender precautions............................................. 30
Seat belt precautions ............. 52
Child-protectors .. ................... 116
Cleaning .......................... 442, 445 Aluminum wheel ornaments . 442
Aluminum wheels ................. 442
Exterior ................................. 442
Interior .................................. 445
Radar sensor........................ 226
Seat belts ............................. 445
Clock ......................................... 91
Coat hooks .............................. 426
Condenser .............................. 461
Console box ............................ 415
Console box light ................... 410
Consumption screen.............. 106
Coolant .................................... 460 Checking .............................. 460
Cooling system ...................... 460 Engine overheating .............. 535
Coussins gonflables Modification et é limination en fin
de vie des coussins gonflables ........................................... 583
Crawl Control .......................... 365
Cruise control Dynamic radar cruise control with full-speed range .......... 256
Cup holders ............................ 414
Current fuel consumption ....... 97
Curtain shield airbags ............. 36
Customizable features ........... 561D
DAC ..........................................372
Daytime running light system211
Daytime running lights Replacing light bulbs ............490
Deck divider ............................417
Defogger Outside rear view mirrors .....401
Rear window.........................401
Windshield ............................401
Differential ...............................546
Digital Rear-view Mirror .........146
Dimension ...............................540
Dinghy towing .........................194
Display Dynamic radar cruise control with full-speed range ..........256
Head-up display ...................102
Intuitive parking assist ..........274
LTA (Lane Tracing Assist) .....248
Multi-information display.........95
Warning messages ............... 511
Display change button .............93
Distance until next engine oil change .....................................93
Do-it-yourself maintenance ...449
Door courtesy lights...............410
Door lock Side doors ............................ 113
Smart key system .................128
Wireless remote control........ 111
Doors Automatic door locking and unlocking system ................ 116
Door glasses ........................160
Door lock .............................. 113
Open door warning buzzer . 114, 11 6
Outside rear view mirrors .....155
Rear door child-protectors .... 116
Side doors ............................ 113

Owners Manual_USA_M0C052_en
Alphabetical Index597
........................................... 499
If your vehicle becomes stuck ........................................... 538
If your vehicle has to be stopped in an emergency................. 494
If your vehicle needs to be towed ........................................... 497
If your vehicle overheats ...... 535
Engine ..................................... 542 ACC...................................... 198
Compartment ....................... 457
How to start the hybrid system........................................... 195
If the hybrid sy stem will not start
........................................... 524
If your vehicle has to be stopped in an emergency................. 494
Overheating.......................... 535
Power switch ........................ 195
Engine coolant ....................... 460 Capacity ............................... 544
Checking .............................. 460
Preparing and c hecking before
winter.................................. 395
Engine coolant temperature gauge....................................... 91
Engine oil Capacity ............................... 543
Checking .............................. 458
Warning light ........................ 502
Engine oil pressure gauge ...... 91
Engine switch (power switch)195 Auto power off function ........ 198
Changing the power switch modes ................................ 198
If your vehicle has to be stopped in an emergency................. 494
Starting the hybrid system.... 195
Enhanced Vehicle Stability Con- trol (Enhanced VSC) ............ 375
Enhanced VSC (Enhanced Vehi- cle Stability Control) ............ 375 EPS (Electric Po
wer Steering)
...............................................375 Warning light.........................503
Event data recorder (EDR) .........8
F
Flat tire.....................................515 Tire pressure w arning system
...........................................468
Floor mats .................................26
Fluid Automatic transm ission ........545
Brake ....................................546
Washer .................................462
Fog light Replacing light bulbs ............490
Switch ...................................214
Footwell lights ........................410
Four-wheel drive system .......361
Front fog light Replacing light bulbs ............490
Front passenger occupant clas- sification system ....................46
Front seats ..............................133 Adjustment ...........................133
Cleaning ...............................445
Correct driving posture ...........27
Driving position memory .......137
Head restraints .....................140
Memory recall function .........139
Power easy access system ..137
Seat heaters ....... ..................407
Seat position memory...........137
Seat ventilators.....................407
Front tray light ........................410
Front turn signal lights ..........204 Turn signal lever ...................204
Front turn signal/parking lights Replacing light bulbs ............490
Wattage ................................548
Fuel Capacity ...............................542

Owners Manual_USA_M0C052_en
Alphabetical Index607
W
Warning buzzersApproach warning ................ 263
Brake hold ............................ 506
Brake Override System ........ 505
Brake system ....................... 501
Charging system .................. 502
Downshifting......................... 203
Drive-Start Control ............... 505
Electric power steering ......... 503
Engine .................................. 502
Hands off steering wheel warn-ing (LTA) ............................. 251
Hybrid system ...................... 502
Intuitive parking assist .. 280, 504
Low engine oil pressure ....... 502
LTA (Lane Tracing Assist) ... 242, 246, 504
Open door .................... 114, 116
Open window ....................... 161
PCS (Pre-Collision System) . 503
PKSB (Parking Support Brake) ........................................... 504
Pre-collision braking ............. 230
Pre-collision warning ............ 230
RCTA (Rear Cross Traffic Alert) ................................... 282, 505
Seat belt ............................... 507
SRS airbag ........................... 502
Vehicle sway warning function (LTA) ................................... 252
Warning label ............................ 76
Warning lights .................. 87, 501 ABS ...................................... 503
Air suspension malfunction indi-cator ................................... 508
Brake hold operated indicator ........................................... 506
Brake Override System ........ 505
Brake system ....................... 501
Charging system .................. 502 Drive-Start Control
................505
Electric power steering .........503
High coolant temperature .....501
Hybrid system .......................502
Intuitive parking assist OFF indi- cator ...................................504
Low engine oil pressure .......502
Low fuel level........................507
LTA indicator .........................504
Malfunction indica tor lamp ....502
Parking brake indicator.........506
PKSB OFF indicator .............504
Pre-collision syst em .............503
RCTA OFF indicator .............505
Rear differential lock indicator ...........................................506
Seat belt reminder light ........507
Slip indicator .........................505
SRS airbag ...........................502
Tire pressure ...... ..................506
Trailer brake warn ing light ....508
Warning messages ................. 511
Washer .....................................218 Adding ..................................462
Preparing and checking before winter ..................................395
Switch ...................................218
Washing and waxing ..............442
Weight Cargo capacity .....................180
Load limits ............................180
Wheel lock nut ........................516
Wheels .....................................478 Replacing .............................478
Size ......................................547
Wheel lock nut ......................516
Window lock switch ...............162
Windows Power back window..............163
Power windows ....................160
Rear window defogger .........401
Washer .................................218