coolant TOYOTA TUNDRA 2023 Owners Manual

942. Instrument cluster
*1: These lights turn on when the engine switch is turned to the “ON” position(vehicles without a smart key system) or IGNITION ON mode (vehi cles
with a smart key system) to indicate that a system check is being per-
formed. They will turn off after the engine is started, or after a few seconds.
There may be a malfunction in a system if the lights do not com e on, or if
the lights do not turn off. Have the vehicle inspected by your Toyota dealer
for details.
*1, 3, 5PCS warning light
( P. 484)*4
(U.S.A.)
ABS warning light
(P. 491)
*2, 4, 5
(Yellow)
LDA indicator ( P. 484)
*4
(Canada)
ABS warning light
(P. 491)
*4
(U.S.A.)
Brake system warning
light ( P. 489)
*2, 4
Slip indicator ( P. 491)
*4
(Canada)
Brake system warning
light (P. 489)
*4, 5Tire pressure warning
light (P. 491)
*4Automatic transmission
fluid temperature warn-
ing light ( P. 490)*4Brake Override System/
Drive-Start Control warn-
ing light
(P. 492, 493, 503)
*4High engine coolant tem-
perature warning light
(P. 490)*4Low engine oil level
warning light ( P. 492)
*4Low engine oil pressure
warning light ( P. 490)*4
(Canada
only)
Low windshield washer
fluid warning light
(P. 493)
*4
Charging system warn-
ing light ( P. 490)

982. Instrument cluster
Gauges and meters
Tachometer
Displays the engine speed in revolutions per minute.
Outside temperature
Displays the outside temperature within the range of -40°F (-40°C) to
122°F (50°C). Low outside temperat ure indicator comes on when the
ambient temperature is 37°F (3°C) or lower.
Speedometer
Displays the vehicle speed.
Fuel gauge
Displays the quantity of fuel remaining in the tank.
Multi-information display
Presents the driver with a variety of vehicle data. ( P. 103)
Displays warning messages in case of a malfunction. ( P. 489)
Odometer/trip meter
P. 99
Shift position and shift range (vehicles with an automatic transmis-
sion)
Displays the selected shift position or selected shift range. ( P. 211)
“ODO/TRIP” and instrument panel light control button
P. 99
Engine coolant temperature gauge
Displays the engine coolant temperature.
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1012. Instrument cluster
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Instrument cluster
WARNING
■The information display at low temperatures
Allow the interior of the vehicle to warm up before using the liquid crystal
information display. At extremely low temperatures, the information display
monitor may respond slowly, and display changes may be delayed.
For example, there is a lag between the driver’s shifting and the new gear
number appearing on the display. This lag could cause the drive r to down-
shift again, causing rapid and excessive engine braking and pos sibly an
accident resulting in personal death or injury.
NOTICE
■ To prevent damage to the engine and its components
● Do not let the indicator needle of the tachometer enter the red zone, which
indicates the maximum engine speed.
● The engine may be overheating if the engine coolant temperature gauge is
in the red zone (H). In this case, immediately stop the vehicle in a safe
place, and check the engine after it has cooled completely. ( P. 534)

1944-1. Before driving
●Slow down before making a turn, in crosswinds, on wet or slippe ry
surfaces, etc.
Increasing vehicle speed can destabilize the trailer.
● Take care when passing other vehicles. Passing requires consider-
able distance. After passing a vehicle, do not forget the lengt h of
your trailer, and be sure you have plenty of room before changi ng
lanes.
● Vehicles with an automatic transmission: To maintain engine bra k-
ing efficiency and charging system performance when using engin e
braking, do not use the transmission in D. If in the S mode, th e
transmission shift range posit ion must be in 5 or lower.
● Vehicles with a manual transmiss ion: To maintain engine braking
efficiency and charging system performance when using engine
braking, do not use the sixth gear.
● Instability happens more frequently when descending steep or lo ng
downhill grades. Before descending, slow down and downshift. Do
not make sudden downshifts while descending steep or long down-
hill grades.
● Avoid holding the brake pedal down too long or applying the bra kes
too frequently. This could cause the brakes to overheat and result in
reduced braking efficiency.
● Due to the added load of the trailer, your vehicle’s engine may over-
heat on hot days (at temperatures over 85°F [30°C]) when drivin g
up a long or steep grade. If the engine coolant temperature gau ge
indicates overheating, immediately turn off the air conditionin g (if in
use), pull your vehicle off the road and stop in a safe spot.
(  P. 534)

3294-6. Driving tips
4
Driving
Winter driving tips
●Use fluids that are appropriate t o the prevailing outside tempera-
tures. • Engine oil
• Engine coolant
• Washer fluid
● Have a service technician inspec t the condition of the battery.
● Have the vehicle fitted with four snow tires or purchase a set of tire
chains for the rear tires.
Ensure that all tires are the same size and brand, and that chains match
the size of the tires.
Perform the following according to the driving conditions:
● Do not try to forcibly open a window or move a wiper that is fr ozen.
Pour warm water over the frozen area to melt the ice. Wipe away
the water immediately to p revent it from freezing.
● To ensure proper operation of the climate control system fan,
remove any snow that has accumulated on the air inlet vents in
front of the windshield.
● Check for and remove any excess ic e or snow that may have accu-
mulated on the exterior lights, vehicle’s roof, chassis, around the
tires or on the brakes.
● Remove any snow or mud from the bottom of your shoes before
getting in the vehicle.
Accelerate the vehicle slowly, keep a safe distance between you and
the vehicle ahead, and drive at a reduced speed suitable to roa d con-
ditions.
Carry out the necessary preparations and inspections before
driving the vehicle in winter. Always drive the vehicle in a ma n-
ner appropriate to the prevailing weather conditions.
Preparation for winter
Before driving the vehicle
When driving the vehicle

4116-2. Maintenance
6
Maintenance and care
General maintenance
Listed below are the general maintenance items that should be
performed at the intervals specified in the “Owner’s Warranty
Information Booklet” or “Own er’s Manual Supplement/Sched-
uled Maintenance Guide”. It is recommended that any problem
you notice should be brought to the attention of your Toyota
dealer or qualified s ervice shop for advice.
Engine compartment
ItemsCheck points
BatteryCheck the connections. (P. 428)
Brake fluidIs the brake fluid at the correct level? ( P. 425)
Engine coolantIs the engine coolant at the correct level? (P. 423)
Engine oilIs the engine oil at the correct level? (P. 421)
Exhaust systemThere should not be any fumes or strange sounds.
Power steering fluidIs the power steering fluid at correct level?
(P. 426)
Radiator/condenserThe radiator and condenser should be free from for-
eign objects. ( P. 425)
Washer fluidIs there sufficient washer fluid? (P. 430)

4156-3. Do-it-yourself maintenance
6
Maintenance and care
Do-it-yourself ser vice precautions
If you perform maintenance by yourself, be sure to follow the
correct procedure as given in these sections.
ItemsParts and tools
Battery condition
(  P. 428)• Warm water• Baking soda• Grease
• Conventional wrench (for terminal clamp bolts)
Brake fluid level
( P. 425)• FMVSS No.116 DOT 3 or SAE J1703 brake fluid
• Rag or paper towel
• Funnel (used only for adding brake fluid)
Engine coolant
level ( P. 423)
• “Toyota Super Long Life Coolant” or a similar high
quality ethylene glycol-based non-silicate, non-
amine, non-nitrite and non-borate coolant with long-
life hybrid organic acid technology
For the U.S.A.:
“Toyota Super Long Life Coolant” is pre-mixed with
50% coolant and 50% deionized water.
For Canada:
“Toyota Super Long Life Coolant” is pre-mixed with
55% coolant and 45% deionized water.
• Funnel (used only for adding coolant)
Engine oil level
(  P. 421)• “Toyota Genuine Motor Oil” or equivalent
• Rag or paper towel
• Funnel (used only for adding engine oil)
Fuses
( P. 455)• Fuse with same amperage rating as original
Light bulbs
( P. 458)
• Bulb with same number and wattage rating as origi-
nal
• Phillips-head screwdriver
• Flathead screwdriver• Wrench
Power steering
fluid level

(
P. 426)
• Automatic transmission fluid DEXRON® II or III
• Rag or paper towel
• Funnel (used only for adding power steering fluid)
Radiator and
condenser
(
P. 425)

Tire inflation
pressure
(  P. 442)• Tire pressure gauge
• Compressed air source
Washer fluid
( P. 430)• Water or washer fluid containing antifreeze (for win-
ter use)
• Funnel (used only for adding water or washer fluid)

4196-3. Do-it-yourself maintenance
6
Maintenance and care
Engine compartment
2TR-FE engine
Washer fluid tank (P. 430)
Radiator cap
Engine coolant reservoir ( P. 423)
Engine oil filler cap ( P. 422)
Power steering fluid reservoir ( P. 426) Engine oil level dipstick
( P. 421)
Brake fluid reservoir ( P. 425)
Fuse box ( P. 455)
Battery ( P. 428)
Condenser ( P. 425)
Radiator ( P. 425)1
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4206-3. Do-it-yourself maintenance
2GR-FKS engine
Washer fluid tank (P. 430)
Power steering fluid reservoir ( P. 426)
Radiator cap
Engine oil level dipstick ( P. 421)
Engine coolant reservoir ( P. 423) Engine oil filler cap (
P. 422)
Brake fluid reservoir ( P. 425)
Fuse box ( P. 455)
Battery ( P. 428)
Condenser ( P. 425)
Radiator ( P. 425)1
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4236-3. Do-it-yourself maintenance
6
Maintenance and care
The coolant level is satisfactory if it is between the “FULL” a nd “LOW”
lines on the reservoir when the engine is cold.
Reservoir cap
“FULL” line
“LOW” line
If the level is on or below the
“LOW” line, add coolant up to
the “FULL” line. ( P. 534)
WARNING
■Used engine oil
● Used engine oil contains potentially harmful contaminants which may
cause skin disorders such as inflammation and skin cancer, so care
should be taken to avoid prolonged and repeated contact. To remove used
engine oil from your skin, wash thoroughly with soap and water.
● Dispose of used oil and filters only in a safe and acceptable manner. Do
not dispose of used oil and filters in household trash, in sewers or onto the
ground.
Call your Toyota dealer, service station or auto parts store fo r information
concerning recycling or disposal.
● Do not leave used engine oil within the reach of children.
NOTICE
■To prevent serious engine damage
Check the oil level on a regular basis.
■ When replacing the engine oil
● Be careful not to spill engine oil on the vehicle components.
● Avoid overfilling, or the engine could be damaged.
● Check the oil level on the dipstick every time you refill the vehicle.
● Be sure the engine oil filler cap is properly tightened.
Engine coolant
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