2021 TOYOTA 4RUNNER air condition

4727-2. Steps to take in an emergency
4RUNNER (U)
●Fluid leaks un der the vehicle.
(Water dripping from the air conditioning a fter use is normal.)
● Flat-looking tires or uneven tire wear
● Engine coolant temperature gauge needle continually points high er
than normal.
● Changes in exhaust sound
● Excessive tire squeal when cornering
● Strange noises related to the suspension system
● Pinging or other noises related to the engine
● Engine missing, stumb ling or running roughly
● Appreciable loss of power
● Vehicle pulls heavily to one side when braking
● Vehicle pulls heavily to one s ide when driving on a level road
● Loss of brake effectiveness, spongy feeling, pedal almost touch es
the floor
If you think something is wrong
If you notice any of the followi ng symptoms, your vehicle proba -
bly needs adjustment or repair. Contact your Toyota dealer as
soon as possible.
Visible symptoms
Audible symptoms
Operational symptoms

5147-2. Steps to take in an emergency
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

5398-1. Specifications
8
Vehicle specifications
4RUNNER (U)
Glossary of tire terminology
Tire related termMeaning
Cold tire inflation pres-
sure
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
pressureThe maximum cold inflated pressure to which
a tire may be inflated, shown on the sidewall
of the tire
Recommended infla-
tion pressureCold tire inflation pressure recommended by a
manufacturer
Accessory weight
The combined weight (in excess of those stan-
dard items which may be replaced) of auto-
matic transmission, power steering, power
brakes, power windows, power seats, radio
and heater, to the extent that these items are
available as factory-installed equipment
(whether installed or not)
Curb weight
The weight of a motor vehicle with standard
equipment, including the maximum capacity of
fuel, oil and coolant, and if so equipped, air
conditioning and additional weight optional
engine
Maximum loaded vehi-
cle weight
The sum of:
(a) Curb weight
(b) Accessory weight
(c) Vehicle capacity weight
(d) Production options weight
Normal occupant
weight150 lb. (68 kg) times the number of occupants
specified in the second column of Table 1
*
that follows
Occupant distributionDistribution of occupants in a vehicle as speci-
fied in the third column of Table 1
* below

5518-2. Customization
8
Vehicle specifications
4RUNNER (U)■
Meters (
P. 8 8 )
*: If equipped
■
Front automatic air conditioning system* ( P. 347)
*: If equipped
FunctionDefault settingCustomized
setting
Sensitivity of the ambient
light sensor used for dim-
ming the meter lights etc.
*
Standard -2 to 2 – – O
Sensitivity of the ambient
light sensor used for
brightening the meter
lights etc.
*
Standard -2 to 2 – – O
123
FunctionDefault settingCustomized setting
Switching between out-
side air and recirculated air
mode linked to automatic
mode button operation Auto Manual – O O
A/C automatic mode but-
ton operation Auto Manual – O O
123

579
4RUNNER (U)
Alphabetical index
Alphabetical index
A/C .................................... 340, 347Air conditioning filter ............. 441
ABS (Anti-lock Brake System)...... 320
Function ................................ 320
Warning light ......................... 475
Active head restraints ............. 137
Active traction control ............ 300
Air conditioning filter .............. 441
Air conditioning
system ............................ 340, 347 Air conditioning filter ............. 441
Airbags ....................................... 35
Airbag operating conditions .... 42
Airbag precautions for your child ......................... 37
Airbag warning light .............. 475
Correct driving posture ........... 28
Curtain shield airbag operating conditions ............. 42
Curtain shield airbag precautions ........................... 39
Front passenger occupant classification syst em............. 46
General airbag precautions .... 37
Locations of airbags................ 35
Modification and disposal of airbags.............................. 41
Side airbag operating
conditions ............................. 42
Side airbag precautions .......... 37
Side and curtain shield airbags operating conditions ............. 42
Side and curtain shield airbags precautions .............. 37
SRS airbags............................ 35 Alarm .......................................... 79
Alarm ...................................... 79
Warning buzzer .................... 474
Anchor brackets ........................ 57
Antennas (smart key system) ............... 118
Anti-lock Brake System (ABS) ...................................... 320
Function ................................ 320
Warning light......................... 475
Armrest..................................... 383
Assist grip ................................ 383
Audio system
*
AUTO LSD system................... 302
Automatic air conditioning
system.................................... 347
Automatic High Beam ............. 230
Automatic light control
system.................................... 225
Automatic running boards ..... 128
Automatic transmission ......... 218
If the shift lever cannot be shifted from P .... 221
S mode ................................. 219
AUX port
*
Auxiliary boxes ........................ 364
A
*: Refer to the “NAVIGATION AND MULTIMEDIA SYSTEM OWNER’S MANUAL”.

583Alphabetical index
4RUNNER (U)
Front passenger occupant classification system .............. 46
Front personal lights ............... 358
Front seats ............................... 136 Adjustment ............................ 136
Cleaning................................ 395
Correct driving posture ........... 28
Driving position memory ....... 149
Head restraints ..................... 153
Seat heaters ......................... 355
Seat position memory ........... 149
Seat ventilators ..................... 355
Front side marker lights.......... 225 Light switch ........................... 225
Replacing light bulbs............. 454
Wattage ................................ 529
Front turn signal lights ........... 223
Replacing light bulbs............. 452
Turn signal lever ................... 223
Wattage ................................ 529
Fuel ........................................... 242 Capacity ................................ 522
Fuel gauge .............................. 88
Fuel pump shut off system.... 473
Information ............................ 530
Refueling............................... 242
Type .............................. 242, 522
Warning light ......................... 477
Fuel filler door.......................... 242 Refueling............................... 242
Fuel pump shut off system ..... 473
Fuses ........................................ 446
Garage door opener ................ 384
Gauges ....................................... 88
Glove box ................................. 361
Grocery bag hooks .................. 370 Head restraints ........................ 153
Headlights ................................ 225
Automatic High Beam system .......... ...................... 230
Light switch ........................... 225
Replacing light bulbs .... 451, 459
Wattage ................................ 529
Heaters Air conditioning system ....... ................. 340, 347
Outside rear view mirrors ....................... 342, 349
Seat heaters ......................... 355
Hill-start assist control ........... 321
Hood ......................................... 407
Hooks Cargo hooks ......................... 367
Cargo net hooks ................... 368
Grocery bag hooks ............... 370
Retaining hooks (floor mat) .... 26
Horn .......................................... 156
G
H

585Alphabetical index
4RUNNER (U)
LATCH anchors ......................... 59
LeverAuxiliary catch lever .............. 407
Hood lock release lever ........ 407
Shift lever .............................. 218
Turn signal lever ................... 223
Wiper lever.................... 236, 239
License plate lights ................. 225 Light switch ........................... 225
Replacing light bulbs............. 458
Wattage ................................ 529
Light bulbs Replacing .............................. 451
Wattage ................................ 529
Lights Automatic High Beam
system ......... ....................... 230
Fog light switch ..................... 234
Front Interior light.................. 358
Headlight switch.................... 225
Interior lights list .................... 357
Luggage compartment lights ................................... 133
Personal lights ...................... 358
Rear interior light .................. 358
Replacing light bulbs............. 451
Turn signal lever ................... 223
Vanity lights .......................... 372
Wattage ................................ 529
Limited slip differential ........... 321
Load capacity........................... 191
Lock steering column ........................... 210, 215
Luggage compartment features .................................. 367 Maintenance
Do-it-yourself maintenance... 404
General maintenance ........... 400
Maintenance data ................. 520
Maintenance requirements ... 398
Resetting the message indicating maintenance is
required .............................. 399
Malfunction indicator lamp..... 475
Manual air conditioning system.................................... 340
Master warning light ....... 478, 484
Meter ........................................... 88 Indicators ................................ 85
Instrument panel light control .................................. 89
Meters..................................... 88
Multi-information display ......... 90
Warning lights ......................... 83
Mirrors Inside rear view mirror .......... 158
Outside rear view mirror defoggers ................... 342, 349
Outside rear view mirrors ..... 160
Vanity mirrors ....................... 372
Moon roof ................................. 170
Door lock linked moon roof operation ........... 172
Jam protection function ........ 171
Operation .............................. 170
LM