2023 TOYOTA 4RUNNER overheating

892. Instrument cluster
2
Instrument cluster
4RUNNER (U)
Switches between odometer and
trip meter displays. When the trip
meter is displayed, pressing and
holding the button will reset the
trip meter.
The brightness of the instrument panel lights can be adjusted.Brighter
Darker
■The meters and display illuminate when
The engine switch is in IGNITION ON mode.
■ The brightness of the instrument panel lights
When the headlight switch is turned to on, the brightness will be reduced
slightly unless the control dial is turned fully upward.
Changing the display
Instrument panel light control
1
2
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. 519)

1734-1. Before driving
4
Driving
4RUNNER (U)
WARNING
Observe the following precautions.
Failure to do so may result in death or serious injury.
■When taking a nap in the vehicle
Always turn the engine off. Otherwise, if you accidentally move the shift
lever or depress the accelerator pedal, this could cause an acc ident or fire
due to engine overheating. Additionally, if the vehicle is parked in a poorly
ventilated area, exhaust gases may collect and enter the vehicl e, leading to
death or a serious health hazard.
■ When braking
● When the brakes are wet, drive more cautiously.
Braking distance increases when the brakes are wet, and this may cause
one side of the vehicle to brake differently than the other side. Also, the
parking brake may not securely hold the vehicle.
● If the brake booster device does not operate, do not follow oth er vehicles
closely and avoid hills or shar p turns that require braking.
In this case, braking is still possible, but the brake pedal should be
depressed more firmly than usual. Also, the braking distance will increase.
● Do not pump the brake pedal if the engine stalls.
Each push on the brake pedal uses up the reserve for the power-assisted
brakes.
● The brake system consists of 2 individual hydraulic systems; if one of the
systems fails, the other will still operate. In this case, the brake pedal
should be depressed more firmly than usual and the braking dist ance will
increase.
If this happens, do not continue to drive the vehicle. Have you r brakes
fixed immediately.

1924-1. Before driving
4RUNNER (U)
●Avoid jerky starts or sudden acceleration.
● Avoid jerky steering and sharp turns, and slow down before maki ng
turn.
● Note that when making a turn, the trailer wheels will be closer than
the vehicle wheels to the inside of the turn. Compensate by mak ing
a wider than normal turning radius.
● Slow down before making a turn, in cross winds, on wet or slipp ery
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.
● To maintain engine braking efficiency and charging system perfo r-
mance when using engine braking, do not put the transmission in
D.
● 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. 519)

2114-2. Driving procedures
4
Driving
4RUNNER (U)
To set the parking brake, fully
depress the parking brake pedal
with your left foot while depress-
ing the brake pedal with your right
foot.
(Depressing the pedal again
releases the parking brake.)
■Parking the vehicle
P. 166
■ Usage in winter time
P. 332
Parking brake
U.S.A.Canada
NOTICE
■Before driving
Fully release the parking brake.
Driving the vehicle with the parking brake set will lead to bra ke components
overheating, which may affect braking performance and increase brake
wear.

3214-5. Using the driving support systems
4
Driving
4RUNNER (U)
■Multi-terrain Select is temporarily canceled when
The front-wheel drive control lever is shifted to H4 when Multi -terrain Select is
in ROCK, MOGUL or LOOSE ROCK mode. The mode indicator will flas h until
the lever is shifted back to L4.
■ If the Multi-terrain Select indicator continues to flash
This may indicate a malfunction in the Multi-terrain Select sys tem.
In this case, Multi-terrain Select is automatically canceled. Have your vehicle
inspected by your Toyota dealer.
■ If the Multi-terrain Select indicator goes off while Multi-terrain Select is
operating
●One of the vehicle systems related to Multi-terrain Select may be malfunc-
tioning.
Have your vehicle inspected by your Toyota dealer.
●
The brake actuator may be at risk of overheating.
A buzzer will sound, the “A-TRAC” indicator will go off and the “TRAC OFF”
indicator will come on. Stop the vehicle in a safe place. Refrain from using
Multi-terrain Select until the “A-TRAC” indicator comes back on and the
“TRAC OFF” indicator goes off. (The vehicle can still be driven, even if Multi-
terrain Select is inoperative.)
In the above cases, Multi-terrain Select is automatically canceled.
WARNING
■ Before driving
To avoid an accident, observe the precautions relating to off-road driving.
(P. 335)
■ When using Multi-terrain Select
● Do not use the Multi-terrain Select system for normal (on-road) driving.
The Multi-terrain Select system is designed for off-road use on l y.
● Do not overly rely on Multi-terrain Select. This function does not extend
the vehicle’s performance limitations. Always check the terrain thoroughly
and drive safely.
● The recommended modes for the listed terrains ( P. 316) are only a refer-
ence. The selected mode may not be suitable to actual off-road conditions
due to factors such as the type or unevenness of the terrain or the degree
of incline. Check the actual terrain thoroughly and drive safel y.
● After selecting a mode, make sure that the Multi-terrain Select indicator
and the selected mode indicator come on. If any related indicator flashes,
the vehicle is not under Multi-terrain Select control.

5197-2. Steps to take in an emergency
7
When trouble arises
4RUNNER (U)
●The needle of the engine coolant temperature gauge ( P. 8 8 )
enters the red zone o r a loss of engine power is experienced.
(For example, the vehicle speed does not increase.)
● Steam comes out f rom under the hood.
Stop the vehicle in a safe place and turn off the air condition ing sys-
tem, and then stop the engine.
If you see steam:
Carefully lift the hood after the steam subsides.
If you do not see steam:
Carefully lift the hood.
After the engine has cooled
down sufficiently, inspect the
hoses and radiator core (radia-
tor) for any leaks. Radiator
Cooling fan
If a large amount of coolant leaks,
immediately contact your Toyota
dealer.
The coolant level is satisfactory
if it is between the “F” and “L”
lines on the reservoir.Reservoir
“F” line
“L” line
Radiator cap
If your vehicle overheats
The following may indicate that your vehicle is overheating:
Correction procedures
1
2
3
1
2
4
1
2
3
4

584Alphabetical index
4RUNNER (U)
Child safety ................................ 54Airbag precautions .................. 39
Back door precautions .......... 126
Battery precautions ....... 423, 518
Child restraint system ............. 55
How your child should
wear the seat belt ................. 33
Installing child restraints ......... 59
Moon roof precautions .......... 164
Power window lock switch .... 155
Power window precautions ... 157
Rear door child-protectors .... 109
Removed electronic key battery precautions ...... 448
Seat belt extender precautions ........................... 36
Seat belt precautions .............. 58
Seat heater precautions........ 357
Child-protectors....................... 109
Cleaning ........................... 396, 400 Exterior ................................. 396
Interior................................... 400
Seat belts .............................. 401
Wheels and wheel ornaments .......................... 397
Clock ......................................... 376
Compass .................................... 92
Condenser ................................ 419
Console box ............................. 364
Cooling system Engine overheating ............... 519
Crawl Control ........................... 312
Cruise control Dynamic radar cruise control................................. 257
Cup holders.............................. 365
Curtain shield airbags ............... 37
Customizable features ............ 549 Daytime running light
system.................................... 215
Defogger Front windshield ................... 351
Outside rear view
mirrors ........................ 344, 351
Rear window ................. 344, 351
Dimension ................................ 524
Dinghy towing.......................... 198
Display Dynamic radar cruise control ................................ 257
LDA
(Lane Departure Alert) ....... 249
Multi-information display ......... 90
Trip information....................... 90
Warning message................. 488
Do-it-yourself maintenance .... 409
Door courtesy lights Wattage ................................ 533
Doors Automatic door locking
and unlocking system......... 109
Back door ............................. 124
Door lock ...................... 108, 124
Door windows ....................... 155
Open door warning buzzer ... 115
Open door warning light ....... 479
Outside rear view mirrors ..... 153
Rear door child-protector ...... 109
Side doors ............................ 106
Downhill assist control
system.................................... 309
Drive-Start Control .................. 167
Driver’s seat position memory .................................. 142D

585Alphabetical index
4RUNNER (U)
Driving ...................................... 166Break-in tips .......................... 168
Correct driving posture ........... 30
Driving assist systems .......... 322
Off-road precautions ............. 335
Procedures ........................... 166
Winter drive tips .................... 331
Dynamic radar cruise
control .................................... 257
Eco Driving Indicator ................ 98
EDR (Event data recorder) ........ 10
Electronic key .......................... 102 Battery-saving function ......... 116
If the electronic key does not operate properly ................. 512
Replacing the battery ............ 447
Emergency, in case of
If the electronic key does not operate
properly .............................. 512
If the engine will not start ...... 509
If the vehicle battery is discharged .......................... 515
If the warning buzzer sounds ................................ 477
If the warning light turns on ....................................... 477
If a warning message is displayed......................... 488
If the vehicle is submerged
or water on the road is
rising ................................... 468
If you cannot operate
back door opener ............... 511 If you have a flat tire ............. 493
If you think something
is wrong .............................. 475
If your vehicle becomes stuck ................................... 522
If your vehicle has to be stopped in an emergency ... 467
If your vehicle needs
to be towed......................... 469
If your vehicle overheats....... 519
Emergency flashers ................ 466
Engine
ACCESSORY mode ............. 200
Compartment ........................ 413
Engine switch ....................... 199
Hood ..................................... 412
How to start the engine......... 199
Identification number ............ 525
If the engine will not start ...... 509
Ignition switch (engine switch) ................... 199
Overheating .......................... 519
Engine coolant......................... 417
Capacity................................ 528
Checking............................... 417
Preparing and checking before winter ...................... 331
Engine coolant temperature gauge ....................................... 88
Engine immobilizer system ...... 78
Engine oil ................................. 415
Capacity................................ 527
Checking............................... 415
Preparing and checking before winter ...................... 331
Engine switch .......................... 199
Event data recorder (EDR)........ 10
E