2020 TOYOTA 4RUNNER check engine

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4RUNNER (U)6-1. Maintenance and care
Cleaning and protecting the vehicle exterior .......... 390
Cleaning and protecting the vehicle interior ........... 393
6-2. Maintenance Maintenance requirements ................... 396
General maintenance ........ 398
Emission inspection and maintenance (I/M)
programs ......................... 401
6-3. Do-it-yourself maintenance
Do-it-yourself service precautions ..................... 402
Hood.................................. 405
Engine compartment ......... 406
Tires .................................. 420
Tire inflation pressure........ 434
Wheels .............................. 437
Air conditioning filter .......... 440
Wireless remote control/ electronic key battery ...... 442
Checking and replacing fuses ............................... 445
Light bulbs ......................... 448 7-1. Essential information
Emergency flashers ........... 464
If your vehicle has to be stopped in
an emergency.................. 465
If the vehicle is trapped in rising water .................. 467
7-2. Steps to take in an emergency
If your vehicle needs to be towed ...................... 468
If you think something is wrong ........................... 475
Fuel pump shut off system ............................. 476
If a warning light turns on or a warning buzzer
sounds ............................. 477
If a warning message is displayed...................... 487
If you have a flat tire .......... 492
If the engine will not start ................................. 507
If you cannot operate back door opener ............ 509
If the electronic key does not operate
properly ........................... 510
If the vehicle battery is discharged ................... 513
If your vehicle overheats......................... 517
If the vehicle becomes stuck ................................ 520
6Maintenance and care7When trouble arises

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4RUNNER (U)Please note that this manual applies to all models and explains
all equipment,
including options. Therefore, you may find some explanations fo r equipment
not installed on your vehicle.
All specifications provided in this manual are current at the t ime of printing.
However, because of the Toyota policy of continual product impr ovement, we
reserve the right to make changes at any time without notice.
Depending on specifications, the vehicle shown in the illustrat ions may differ
from your vehicle in terms of color and equipment.
Approximately five hours after the engine is turned off, you ma y hear sound
coming from under the vehicle for several minutes. This is the sound of a fuel
evaporation leakage check and, it does not indicate a malfunction.
A wide variety of non-genuine spare parts and accessories for T oyota vehi-
cles are currently available in the market. You should know tha t Toyota does
not warrant these products and is not responsible for their per formance,
repair, or replacement, or for any damage they may cause to, or adverse
effect they may have on, your Toyota vehicle.
This vehicle should not be modified with non-genuine Toyota pro ducts. Modi-
fication with non-genuine Toyota products could affect its perf ormance, safety
or durability, and may even violate governmental regulations. In addition,
damage or performance problems resulting from the modification may not be
covered under warranty.
The installation of a mobile two-way radio system in your vehic le could affect
electronic systems such as:
● Multiport fuel injection system/sequential multiport fuel injection system
● Toyota Safety Sense P
● Cruise control system
● Anti-lock brake system
● SRS airbag system
● Seat belt pretensioner system
Be sure to check with your Toyota dealer for precautionary meas ures or spe-
cial instructions regarding instal lation of a mobile two-way radio system.
For your infor mation
Main Owner’s Manual
Noise from under vehicle afte r turning off the engine
Accessories, spare parts and m odification of your Toyota
Installation of a mobile two-way radio system

15Pictorial index
4RUNNER (U)
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 420
Tire size/inflation pressure . . . . . . . . . . . . . . . . . . . . . . . . . P. 530
Winter tires/tire chain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 330
Checking/rotation/tire pressur e warning system . . . . . . . . .P. 420
Coping with flat tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 492
Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 405
Opening . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 405
Engine oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 525
Coping with overheat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 517
Headlights/daytime running lights . . . . . . . . . . . . . . . . . . . . P. 225
Front side marker lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 225
Front turn signal/parking lights . . . . . . . . . . . . . . . . . . . . . . P. 225
Fog lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 235
Turn signal lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 223
Stop/tail lights/rear side marker lights . . . . . . . . . . . . . . . . P. 225
License plate lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 225
Back-up lights
Shifting the shift lever to R . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 218
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Light bulbs of the exterior lights for driving
(Replacing method: P. 448, Wattages: P. 531)
*: Vehicles with a smart key system
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271-1. For safe use
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For safety and security
4RUNNER (U)
WARNING
Observe the following precautions.
Failure to do so may cause the driver’s floor mat to slip, possibly interfering
with the pedals while driving. An unexpectedly high speed may result or it may
become difficult to stop the vehicle. This could lead to an acc ident, resulting in
death or serious injury.
■ When installing the driver’s floor mat
● Do not use floor mats designed for other models or different mo del year
vehicles, even if they are Toyota Genuine floor mats.
● Only use floor mats designed for the driver’s seat.
● Always install the floor mat securely using the retaining hooks (clips) pro-
vided.
● Do not use two or more floor mats on top of each other.
● Do not place the floor mat bottom-side up or upside-down.
■ Before driving
● Check that the floor mat is securely
fixed in the correct place with all the
provided retaining hooks (clips). Be
especially careful to perform this check
after cleaning the floor.
● With the engine stopped and the shift
lever in P, fully depress each pedal to
the floor to make sure it does not inter-
fere with the floor mat.

691-1. For safe use
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For safety and security
4RUNNER (U)
Exhaust gas precautions
Harmful substance to the human body is included in exhaust
gases if inhale.
WARNING
Exhaust gases include harmful carbon monoxide (CO), which is colorless and
odorless. Observe the following precautions.
Failure to do so may cause exhaust gases enter the vehicle and may lead to
an accident caused by light-headedness, or may lead to death or a serious
health hazard.
■ Important points while driving
● Keep the back door closed.
● If you smell exhaust gases in the vehicle even when the back do or is
closed, open the windows and have the vehicle inspected at your Toyota
dealer as soon as possible.
■ When parking
● If the vehicle is in a poorly ventilated area or a closed area, such as a
garage, stop the engine.
● Do not leave the vehicle with the engine on for a long time.
If such a situation cannot be avoided, park the vehicle in an o pen space
and ensure that exhaust fumes do not enter the vehicle interior .
● Do not leave the engine running in an area with snow build-up, or where it
is snowing. If snowbanks build up around the vehicle while the engine is
running, exhaust gases may collect and enter the vehicle.
■ Exhaust pipe
The exhaust system needs to be checked periodically. If there is a hole or
crack caused by corrosion, damage to a joint or abnormal exhaust noise, be
sure to have the vehicle inspected and repaired by your Toyota dealer.

842. Instrument cluster
4RUNNER (U)
*1: These lights turn on when the engine switch is turned to IGNITION ON
mode (vehicles with a smart key system) or the engine switch is turned to
the “ON” position (vehicles without a smart key system) to indi cate that a
system check is being performed. 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 come on, or do not turn off. Have the vehicle inspected by
your Toyota dealer.
*2: This light flashes to indicate a malfunction.
*3: This light flashes rapidly to indicate a malfunction.
*4: This light flashes continuously to indicate a malfunction.
*5: This light illuminates on the multi-information display.
*6: This light flashes or illuminates to indicate a malfunction.
*1, 6PCS warning light
( P. 480)*1Power steering warning
light ( P. 479)
*5
(Amber)
LDA indicator ( P. 481)
*1Master warning light
(P. 487)
Open door warning light
(P. 479)*1Tire pressure warning
light ( P. 481)
Low fuel level warning
light (P. 480)
(if equipped)
Unengaged “Park” warn-
ing light ( P. 479)
Seat belt reminder light
(P. 480)*1
(if equipped)
KDSS warning light
(P. 479)
*5
Low engine oil pressure
warning light ( P. 477)*1, 2
(if equipped)
Automatic running
boards indicator light
(P. 479)

862. Instrument cluster
4RUNNER (U)
*1: These lights turn on when the engine switch is turned to the “ON” position
(vehicles without a smart key system) or the engine switch is turned to
IGNITION ON mode (vehicles with a smart key system) to indicate that a
system check is being performed. 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 come on, or do not turn off. Have the vehicle inspected by
your Toyota dealer.
*2: This light flashes to indicate that the system is operating.
*3: This light does not turn on when the system is disabled.
*4: This light illuminates on the center panel.
*5: This light illuminates on the multi-information display.
*6: This light turns on when the system is off.
*5
(Green)
LDA indicator ( P. 265)
(if equipped)
“A-TRAC” indicator
(P. 301)
*2, 5
(Amber)
LDA indicator ( P. 265)
*1
(if equipped)
“AUTO LSD” indicator
(P. 303)
(if equipped)
Four-wheel drive indica-
tor ( P. 293)*5
(if equipped)
Multi-terrain Select indi-
cator ( P. 314)
*1
(if equipped)
Downhill assist control
system indicator
(P. 308)*5
(if equipped)
Crawl Control indicator
(P. 3 1 1 )
(if equipped)
Low speed four-wheel
drive indicator
(P. 293, 297)
(if equipped)
Intuitive parking assist
indicator ( P. 286)
(if equipped)
Rear differential lock
indicator ( P. 305)*1, 2
(if equipped)
Automatic running
boards indicator
(P. 128)
(if equipped)
Center differential lock
indicator ( P. 297)

892. Instrument cluster
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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 instrumen t panel lights can be adjusted.
Brighter
Darker
■ The meters and display illuminate when
Vehicles without a smart key system
The engine switch is in the “ON” position.
Vehicles with a smart key system
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
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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. 517)