2023 TOYOTA TUNDRA check engine

1744-1. Before driving
WARNING
■If you hear a squealing or scraping noise (brake pad wear limit indica-
tors)
Have the brake pads checked and replaced by your Toyota dealer as soon
as possible.
Rotor damage may result if the pads are not replaced when neede d.
It is dangerous to drive the vehicle when the wear limits of the brake pads
and/or those of the brake discs are exceeded.
■ When the vehicle is stopped
● Do not race the engine.
If the vehicle is in any gear other than P (automatic transmission only) or
N, the vehicle may move suddenly and unexpectedly, causing an accident.
● On vehicles with an automatic transmission, in order to prevent accidents
due to the vehicle rolling away, always keep depressing the bra ke pedal
while the engine is running, and apply the parking brake as necessary.
● If the vehicle is stopped on an incline, in order to prevent ac cidents caused
by the vehicle rolling forward or backward, always depress the brake pedal
and securely apply the parking brake as needed.
● Avoid revving or racing the engine.
Running the engine at high speed while the vehicle is stopped may cause
the exhaust system to overheat, which could result in a fire if combustible
material is nearby.
■ When the vehicle is parked
● Do not leave glasses, cigarette lighters, spray cans, or soft drink cans in
the vehicle when it is in the sun.
Doing so may result in the following:
• Gas may leak from a cigarette lighter or spray can, and may le ad to a
fire.
• The temperature inside the vehicle may cause the plastic lenses and plastic material of glasses to deform or crack.
• Soft drink cans may rupture, causing the contents to spray ove r the
interior of the vehicle, and may also cause a short circuit in the vehicle’s
electrical components.
● Do not leave cigarette lighters in the vehicle. If a cigarette lighter is in a
place such as the glove box or on the floor, it may be lit accidentally when
luggage is loaded or the seat is adjusted, causing a fire.
● Do not attach adhesive discs to the windshield or windows. Do not place
containers such as air fresheners on the instrument panel or da shboard.
Adhesive discs or containers may act as lenses, causing a fire in the vehi-
cle.

1774-1. Before driving
4
Driving
NOTICE
■If you get a flat tire while driving
A flat or damaged tire may cause the following situations. Hold the steering
wheel firmly and gradually depress the brake pedal to slow down the vehi-
cle.
● It may be difficult to control your vehicle.
● The vehicle will make abnormal sounds or vibrations.
● The vehicle will lean abnormally.
Information on what to do in case of a flat tire ( P. 511)
■ When encountering flooded roads or waterlogged roads
Do not drive on a road that has flooded after heavy rain, etc. Doing so may
cause the following serious damage to the vehicle:
● Engine stalling
● Short in electrical components
● Engine damage caused by water immersion
● Rubber or mechanical part damage or poor lubrication due to grease
being washed away, or grease becoming contaminated with mud or dirt
In the event that you drive on a flooded road and the vehicle is flooded, be
sure to have your Toyota dealer check the following:
● Brake function
● Changes in quantity and quality of oil and fluid used for the engine, trans-
mission, transfer (4WD models) differentials, etc.
● Lubricant condition for the propeller shaft, clutch fork, beari ngs and sus-
pension joints (where possible), and the function of all joints, bearings, etc.

2024-2. Driving procedures
Engine (ignition) switch (vehicles without a
smart key system)
Automatic transmission
Check that the parking brake is set.
Check that the shift lever is set in P.
Firmly depress the brake pedal.
Turn the engine switch to the “S TART” position to start the engine.
Manual transmission
Check that the parking brake is set.
Check that the shift lever is set in N.
Firmly depress the clutch pedal.
Turn the engine switch to the “S TART” position to start the engine.
“LOCK”
The steering wheel is locked and
the key can be removed. (Vehicles
with an automatic transmission:
The key can be removed only
when the shift lever is in P.)
“ACC”
Some electrical components such
as the audio system can be used.
“ON”
All electrical components can be used.
“START”
For starting the engine.
Starting the engine
Changing the engine switch positions
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2
3
4
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2
3
4
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2
3
4

2044-2. Driving procedures
WARNING
■When starting the engine
Always start the engine while sitting in the driver’s seat. Do not depress the
accelerator pedal while starting the engine under any circumstances.
Doing so may cause an accident resulting in death or serious in jury.
■ Caution while driving
Do not turn the engine switch to the “LOCK” position while driving. If, in an
emergency, you must turn the engine off while the vehicle is moving, turn
the engine switch only to the “ACC” position to stop the engine . An accident
may result if the engine is stopped while driving. ( P. 473)
NOTICE
■To prevent battery discharge
Do not leave the engine switch in the “ACC” or “ON” position fo r long peri-
ods of time without the engine running.
■ When starting the engine
● Do not crank the engine for more than 30 seconds at a time. This may
overheat the starter and wiring system.
● Do not race a cold engine.
● If the engine becomes difficult to start or stalls frequently, have your vehi-
cle checked by your Toyota dealer immediately.

2054-2. Driving procedures
4
Driving
Engine (ignition) switch (vehicles with a
smart key system)
Check that the parking brake is set.
Check that the shift lever is in P.
Firmly depress the brake pedal.
and a message will be dis-
played on the multi-information dis-
play.
If it is not displayed, the engine
cannot be started.
Press the engine switch shortly
and firmly.
When operating the engine switch,
one short, firm press is enough. It
is not necessary to press and hold
the switch.
The engine will crank until it starts
or for up to 30 seconds, whichever
is less.
Continue depressing the brake pedal until the engine is complet ely started.
The engine can be started from any engine switch mode.
Performing the following opera tions when carrying the elec-
tronic key on your person starts the engine or changes engine
switch modes.
Starting the engine
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2
3
4

2074-2. Driving procedures
4
Driving
If the engine is stopped with the shift lever in a position other than P,
the engine switch will not be turned off but instead be turned to
ACCESSORY mode. Perform the following procedure to turn the
switch off:
Check that the park ing brake is set.
Shift the shift lever to P.
Check that “Turn Power OFF” is displayed on the multi-informati on
display and then press the engine switch once.
Check that “Turn Power OFF” on the multi-information display is off.
■Auto power off function
If the vehicle is left in ACCESSORY mode for more than 20 minut es or IGNI-
TION ON mode (the engine is not running) for more than an hour with the
shift lever in P, the engine switch will automatically turn off. However, this
function cannot entirely prevent battery discharge. Do not leav e the vehicle
with the engine switch in ACCESSORY or IGNITION ON mode for lon g peri-
ods of time when the engine is not running.
■ Automatic engine shut off feature (except for New Caledonia)
●The vehicle is equipped with a feature that automatically shuts off the
engine when the shift lever is in P with the engine running for an extended
period.
● The engine will automatically shut off after approximately 1 ho ur if it has
been left running while the shift lever is in P.
● The timer for the automatic engine shut off feature will reset if the brake
pedal is depressed or if the shift lever is in a position other than P.
● After the vehicle is parked, if the door is locked with the door lock switch
(P. 121) from the inside or the mechanical key ( P. 528) from the outside,
the automatic engine shut off feature will be disabled. The tim er for the auto-
matic engine shut off feature will be re-enabled if the driver’ s door is
opened.
■ Electronic key battery depletion
P. 116
■ Conditions affecting operation
P. 134
■ Note for the entry function
P. 135
When stopping the engine with the shift lever in a position other
than P
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2
3
4

2084-2. Driving procedures
■If the engine does not start
●The engine immobilizer system may not have been deactivated. ( P. 78)
Contact your Toyota dealer.
● Check that the shift lever is securely set in P. The engine may not start if the
shift lever is displaced out of P. “Shift to P Position” will b e displayed on the
multi-information display.
■ Steering lock
After turning the engine switch off and opening and closing the doors, the
steering wheel will be locked due to the steering lock function . Operating the
engine switch again automatically cancels the steering lock.
■ When the steering lock cannot be released
■ Steering lock motor overheating prevention
To prevent the steering lock motor from overheating, operation of the motor
may be suspended if the engine is turned on and off repeatedly in a short
period of time. In this case, refrain from running the engine. After about
10 seconds, the steering lock motor will resume functioning.
■ When “Smart Entry & Start System Check” is displayed on the multi-
information display
The system may be malfunctioning. Have the vehicle inspected by your
Toyota dealer immediately.
■ If the electronic key battery is depleted
P. 451
■ Operation of the engine switch
●If the switch is not pressed shortly and firmly, the engine swi tch mode may
not change or the engine may not start.
● If attempting to restart the engine immediately after turning t he engine
switch off, the engine may not start in some cases. After turni ng the engine
switch off, please wait a few seconds before restarting the eng ine.
■ If the smart key system has been d eactivated by a customized setting
P. 528 A message will be displayed on the multi-
information display.
Check that the shift lever is in P. Press the
engine switch while turning the steering
wheel left and right.

2104-2. Driving procedures
NOTICE
■To prevent battery discharge
● Do not leave the engine switch in ACCESSORY or IGNITION ON mode
for long periods of time without the engine running.
● If “ACCESSORY” or “IGNITION ON” is displayed on the multi-information
display while the engine is not running, the engine switch is not off. Exit the
vehicle after turning the engine switch off.
● Do not stop the engine when the shift lever is in a position ot her than P. If
the engine is stopped in another shift lever position, the engine switch will
not be turned off but instead be turned to ACCESSORY mode. If t he vehi-
cle is left in ACCESSORY mode, battery discharge may occur.
■ When starting the engine
● Do not race a cold engine.
● If the engine becomes difficult to start or stalls frequently, have your vehi-
cle checked by your Toyota dealer immediately.
■ Symptoms indicating a malfunction with the engine switch
If the engine switch seems to be operating somewhat differently than usual,
such as the switch sticking slightly, there may be a malfunction. Contact
your Toyota dealer immediately.