2023 TOYOTA 4RUNNER check engine

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4RUNNER (U)6-1. Maintenance and care
Cleaning and protecting the vehicle exterior .......... 396
Cleaning and protecting the vehicle interior ........... 400
6-2. Maintenance Maintenance requirements ................... 403
General maintenance ........ 405
Emission inspection and maintenance (I/M)
programs ......................... 408
6-3. Do-it-yourself maintenance
Do-it-yourself service precautions ..................... 409
Hood.................................. 412
Engine compartment ......... 413
Tires .................................. 427
Tire inflation pressure........ 440
Wheels .............................. 443
Air conditioning filter .......... 445
Electronic key battery ........ 447
Checking and replacing fuses ............................... 450
Light bulbs ......................... 453 7-1. Essential information
Emergency flashers ........... 466
If your vehicle has to be stopped in
an emergency.................. 467
If the vehicle is submerged or water
on the road is rising ......... 468
7-2. Steps to take in an emergency
If your vehicle needs to be towed ...................... 469
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...................... 488
If you have a flat tire .......... 493
If the engine will not start ................................. 509
If you cannot operate back door opener ............ 511
If the electronic key does not operate
properly ........................... 512
If the vehicle battery is discharged ................... 515
If your vehicle overheats......................... 519
If the vehicle becomes stuck ................................ 522
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 explanations for equ ipment not
installed on your vehicle and the illustrations used may differ from your vehi-
cle.
All specifications provided in this manual are current at the t ime of printing.
Over time, your vehicle may receive updates that modify the veh icle and
make material in this manual incomplete and/or inaccurate. Beca use of Toy-
ota's interest in continual product improvement, Toyota reserves the right to
make changes to this manual at any time without notice.
If Toyota chooses to update the manual, updated versions can be viewed by
selecting your vehicle by model and year at the following URL o r on your
mobile device if you have access to the Toyota app.
www.toyota.com/owners
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.
Also, remodeling like this will have an effect on advanced safe ty equipment
such as Toyota Safety Sense P and there is a danger that it wil l not work
properly or the danger that it may work in situations where it should not be
working.
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

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4RUNNER (U)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
● 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.
The vehicle is equipped with sophisticated computers that will record certain
data, such as:
• Engine speed/Electric motor speed (traction motor speed)
• Accelerator status
• Brake status
• Vehicle speed
• Operation status of the driving assist systems
• Images from the camerasYour vehicle is equipped with cameras. Contact your Toyota deal er for the
location of recording cameras.
The recorded data varies according to the vehicle grade level and options
with which it is equipped.
These computers do not record conversations or sounds, and only record
images outside of the vehicle in certain situations.
●Data Transmission
Your vehicle may transmit the data recorded in these computers to Toyota
without notification to you.
●Data usage
Toyota may use the data recorded in this computer to diagnose m alfunc-
tions, conduct research and development, and improve quality.
Toyota will not disclose the recorded data to a third party exc ept:
• With the consent of the vehicle owner or with the consent of the lessee if the vehicle is leased
• In response to an official request by the police, a court of l aw or a govern-
ment agency
• For use by Toyota in a lawsuit
• For research purposes where the data is not tied to a specific vehicle or
vehicle owner
●Recorded image information can be erased by your Toyota dealer.
The image recording function can be disabled. However, if the f unction is
disabled, data from when the system operates will not be available.
Installation of a mobile two-way radio system
Vehicle data recording

17Pictorial index
4RUNNER (U)
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 427
Tire size/inflation pressure . . . . . . . . . . . . . . . . . . . . . . . . . P. 532
Winter tires/tire chain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 331
Checking/rotation/tire pressur e warning system . . . . . . . . .P. 427
Coping with flat tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 493
Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 412
Opening . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 412
Engine oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 527
Coping with overheat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 519
Headlights/daytime running lights . . . . . . . . . . . . . . . . . . . . P. 212
Front side marker lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 212
Front turn signal/parking lights . . . . . . . . . . . . . . . . . . . . . . P. 212
Fog lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 221
Turn signal lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 210
Stop/tail lights/rear side marker lights . . . . . . . . . . . . . . . . P. 212
License plate lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 212
Back-up lights
Shifting the shift lever to R . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 205
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Light bulbs of the exterior lights for driving
(Replacing method: P. 453, Wattages: P. 533)
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291-1. 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 model 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.

711-1. 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 open 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 to indicate that a system check is being performed. They w ill turn off
after the engine is started, or after a few seconds. There may be a mal-
function in a system if a light does not come on, or turn off. Have the vehi-
cle 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.
*1BSM OFF (Blind Spot
Monitor) indicator
( P. 482)*5Low engine oil pressure
warning light ( P. 477)
*1
(Flashes)
RCTA OFF (Rear Cross
Traffic Alert) indicator
(P. 482)*1
Power steering warning
light ( P. 479)
*1, 6PCS warning light
(P. 481)*1Master warning light
(P. 488)
*5
(Amber)
LDA indicator ( P. 481)
*1Tire pressure warning
light (P. 481)
Open door warning light
(P. 479)
(if equipped)
Unengaged “Park” warn-
ing light ( P. 479)
Low fuel level warning
light (P. 480)*1
(if equipped)
KDSS warning light
(P. 479)
Seat belt reminder light
(P. 480)*1, 2
(if equipped)
Automatic running
boards indicator light
(P. 479)

872. Instrument cluster
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Instrument cluster
4RUNNER (U)
*1: These lights turn on when the engine switch is turned to IGNITION ON
mode 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 mal-
function in a system if a light does not come on, or turn off. Have the vehi-
cle 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.
*7: In order to confirm operation, the BSM outside rear view mirror indicators illuminate in the following situations:
• When the engine switch is turned to IGNITION ON mode while the sys-
tem is set to on.
• When the system is set to on while the engine switch is in IGN ITION ON
mode.
*8: This light illuminates on the outside rear view mirrors.
WARNING
■ If a safety system warning light does not come on
Should a safety system light such as the ABS and SRS warning li ght not
come on when you start the engine, this could mean that these s ystems are
not available to help protect you in an accident, which could result in death
or serious injury. Have the vehicle inspected by your Toyota dealer immedi-
ately if this occurs.