2021 TOYOTA TUNDRA ABS

851-3. Theft deterrent system
1
For safety and security
Engine immobilizer system
Vehicles without a smart key sys-
tem:
The indicator light flashes after
the key has been removed from
the engine switch to indicate that
the system is operating.
The indicator light stops flashing
after the registered key has been
inserted into the engine switch to
indicate that the system has been
canceled.
Vehicles with a smart key system:
The indicator light flashes aft er the engine switch has been tu rned off
to indicate that the system is operating.
The indicator light stops flashi ng after the engine switch has been
turned to ACC or ON to indicate t hat the system has been canceled.
The vehicle’s keys ha ve built-in transponder chips that prevent
the engine from starting if a key has not been previously regis -
tered in the vehicle’s on-board computer.
Never leave the keys inside the vehicle when you leave the vehi-
cle.
This system is designed to help prevent vehicle theft but does
not guarantee absolute security against all vehicle thefts.

1012. Instrument cluster
2
Instrument cluster
Warning lights inform the driver of malfunctions in the indicated vehi-
cle’s systems.
Warning lights
*1
(U.S.A.)
Brake system warning
light ( P. 485)Seat belt reminder light
(P. 486)
*1
(Canada)
Brake system warning
light ( P. 485)
*1
Master warning light
(P. 486)
*1
Charging system warn-
ing light ( P. 485)
*1, 3
(U.S.A.)
Parking brake warning
light (P. 486)
*1
(U.S.A.)
Malfunction indicator
lamp ( P. 485)
*1, 3
(Canada)
Parking brake warning
light (P. 486)
*1
(Canada)
Malfunction indicator
lamp ( P. 485)
*1
Tire pressure warning
light (P. 487)
*1
SRS warning light
(P. 485)
*1, 2
Slip indicator ( P. 487)
*1
(U.S.A.)
ABS warning light
(P. 486)
*1, 5PCS warning light
(P. 488)
*1
(Canada)
ABS warning light
(P. 486)
*2, 4, 5
(Yellow)
LDA indicator ( P. 488)
Low fuel level warning
light (P. 486)*4
High engine coolant tem-
perature warning light
(P. 494)

1042. Instrument cluster
*1: These lights turn on when the engine switch is turned to ON to indicate thata 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 if the lights do not turn off. Ha ve the vehicle
inspected by your Toyota dealer for details.
*2: The light flashes to indicate that the system is operating.
*3: In order to confirm operation, the BSM outside rear view mirro r indicators
illuminate in the following situations:
• When the engine switch is turned to ON, the BSM function is enabled on
the screen of the multi-information display.
• When the BSM function is enabled on the screen of the multi-i nfor-
mation display, the engine switch is turned to ON.
If the system is functioning correctly, the BSM outside rear vi ew mirror indi-
cators will turn off after a few seconds.
If the BSM outside rear view mirror indicators do not illuminat e or do not
turn off, there may be a malfunction with the system.
If this occurs, have the vehicle inspected by your Toyota deale r.
*4: The light illuminates on the outside rear view mirrors.
*5: The light illuminates on the center panel.
*6: The light illuminates on the multi-information display.
*7: When the outside temperature is approximately 37°F (3°C) or lo wer, the
indicator will flash for 10 times, then comes on.
*8: The light comes on when the system is turned off.
*9: If equipped
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 r esult in death
or serious injury. Have the vehicle inspected by your Toyota de aler immedi-
ately if this occurs.

1353-2. Opening, closing and locking the doors
3
Operation of each component
Open the tailgate.
Pull out the plastic wire protec-
tor located in the vehicle bed by
pressing the tabs and pulling
the protector.
Plastic wire protector
Pull out the wire harness from
the vehicle bed.
Attach the connector cover
(Gray) to the tailgate wire har-
ness connector (White). Tailgate wire harness con-
nector (White)
Connector cover (Gray)3
4
5
6
1

2114-1. Before driving
4
Driving
●Always place wheel blocks under both the vehicle’s and the trai ler’s
wheels when parking. Apply the parking brake firmly, and put th e
transmission in P. Avoid parking on a slope, but if unavoidable , do
so only after perform ing the following:
Apply the brakes and keep them applied.
Have someone place wheel blocks under both the vehicle’s and
trailer’s wheels.
When the wheel blocks are in pl ace, release the brakes slowly
until the blocks absorb the load.
Apply the parking brake firmly.
Shift into P and turn off the engine.
● When restarting afte r parking on a slope:
With the transmission in P, start the engine. Be sure to keep t he
brake pedal pressed.
Shift into D or R (if reversing).
Release the parking brake and brake pedal, and slowly pull or
back away from the wheel bloc ks. Stop and apply the brakes.
Have someone retrieve the blocks.
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2
3
4
5
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2
3
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2824-5. Using the driving support systems
WARNING
●Assisting the driver to judge proper following distance
The dynamic radar cruise control determines whether the followi ng dis-
tance between the driver’s own vehicle and a designated vehicle traveling
ahead is within a set range. It is not capable of making any other type of
judgement. Therefore, it is absolutely necessary for the driver to remain
vigilant and to determine whether or not there is a possibility of danger in
any given situation.
● Assisting the driver to operate the vehicle
The dynamic radar cruise control has limited capability to prev ent or avoid
a collision with a vehicle traveling ahead. Therefore, if there is ever any
danger, the driver must take immediate and direct control of th e vehicle
and act appropriately in order to ensure the safety of all involved.
■ Situations unsuitable for dynamic radar cruise control
Do not use dynamic radar cruise control in any of the following situations.
Doing so may result in inappropriate speed control and could ca use an acci-
dent resulting in death or serious injury.
● Roads where there are pedestrians, cyclists, etc.
● In heavy traffic
● On roads with sharp bends
● On winding roads
● On slippery roads, such as those covered with rain, ice or snow
● On steep downhills, or where there are sudden changes between s harp up
and down gradients
Vehicle speed may exceed the set speed when driving down a stee p hill.
● At entrances to freeways and highways
● When weather conditions are bad enough that they may prevent the sen-
sors from detecting correctly (fog, snow, sandstorm, heavy rain, etc.)
● When there is rain, snow, etc., on the front surface of the rad ar sensor or
front camera
● In traffic conditions that require frequent repeated acceleration and decel-
eration
● When your vehicle is towing a trailer or during emergency towin g
● When an approach warning buzzer is heard often

3034-5. Using the driving support systems
4
Driving
WARNING
●The shape of the obstacle may prevent the sensor from detecting it. Pay
particular attention to the following obstacles:
• Wires, fences, ropes, etc.
• Cotton, snow and other materials that absorb sound waves
• Sharply-angled objects
• Low obstacles
• Tall obstacles with upper sections projecting outwards in the direction of
your vehicle
● The following situations may occur during use.
• Depending on the shape of the obstacle and other factors, the detection
distance may shorten, or detection may be impossible.
• Obstacles may not be detected if they are too close to the sen sor.
• There will be a short delay between obstacle detection and dis play.
Even at slow speeds, there is a possibility that the obstacle w ill come
within the sensor’s detection areas before the display is shown and the
warning beep sounds.
• Thin posts or objects lower than the sensor may not be detecte d for col-
lision when approached, even if they have been detected once.
• It might be difficult to hear beeps due to the volume of audio system or
air flow noise of air conditioning system.

3204-5. Using the driving support systems
Driving assist systems
◆ABS (Anti-lock Brake System)
Helps to prevent wheel lock when the brakes are applied suddenl y,
or if the brakes are applied while driving on a slippery road surface
◆Brake assist
Generates an increased level of braking force after the brake p edal
is depressed when the system de tects a panic stop situation
◆VSC (Vehicle Stability Control)
Helps the driver to control skidding when swerving suddenly or
turning on slippery road surfaces
◆Trailer Sway Control
Helps the driver to control trailer sway by selectively applying brake
pressure for individual wheels and reducing driving torque when
trailer sway is detected
◆TRAC (Traction Control) for 2WD models and 2WD mode on
4WD models
Helps to maintain drive power and prevent the drive wheels from
spinning when starting the vehicl e or accelerating on slippery roads
◆Hill-start assist control
Helps to reduce the backward movement of the vehicle when start -
ing on an uphill
To keep driving safety and perf ormance, the following systems
operate automatically in respon se to various driving situations.
Be aware, however, that these systems are supplementary and
should not be relied upon too heav ily when operating the vehi-
cle.