2021 TOYOTA TUNDRA cruise control

2904-5. Using the driving support systems
■Dynamic radar cruise control can be set when
●The shift lever is in D or range 4 or higher of S has been sele cted.
● Vehicle speed is at or above approximately 30 mph (50 km/h).
■ Accelerating after setting the vehicle speed
The vehicle can accelerate by operating the accelerator pedal. After acceler-
ating, the set speed resumes. However, during vehicle-to-vehicl e distance
control mode, the vehicle speed may decrease below the set spee d in order
to maintain the distance to the preceding vehicle.
■ Automatic cancelation of vehicle-to-vehicle distance control mo de
Vehicle-to-vehicle distance control mode is automatically cance led in the fol-
lowing situations:
● Actual vehicle speed falls at or below approximately 25 mph (40 km/h).
● VSC is activated.
● TRAC is activated for a period of time.
● When the VSC or TRAC system is turned off.
● The sensor cannot detect correctly because it is covered in some way.
● Pre-collision braking is activated.
If vehicle-to-vehicle distance control mode is automatically ca nceled for any
other reason, there may be a malfunction in the system. Contact your Toyota
dealer.

2914-5. Using the driving support systems
4
Driving
■Automatic cancelation of c onstant speed control mode
Constant speed control mode is automatically canceled in the following situa-
tions:
● Actual vehicle speed is more than approximately 10 mph (16 km/h ) below
the set vehicle speed.
● Actual vehicle speed falls below approximately 25 mph (40 km/h) .
● VSC is activated.
● TRAC is activated for a period of time.
● When the VSC or TRAC system is turned off.
● Pre-collision braking is activated.
If constant speed control mode is automatically canceled for an y other rea-
son, there may be a malfunction in the system. Contact your Toyota dealer.
■ Brake system operation sound
If the brakes are applied automatically while the vehicle is in vehicle-to-vehi-
cle distance control mode, a brake system operation sound may b e heard.
This does not indicate a malfunction.
■ Warning messages and buzzers for d ynamic radar cruise control
Warning messages and buzzers are used to indicate a system malfunction or
to inform the driver of the need for caution while driving. If a warning message
is shown on the multi-information display, read the message and follow the
instructions.
■ When the sensor may not be correctly detect ing the vehicle ahead
In the case of the following and depending on the conditions, o perate the
brake pedal when deceleration of the system is insufficient or operate the
accelerator pedal when acceleration is required.
As the sensor may not be able to correctly detect these types o f vehicles, the
approach warning ( P. 288) may not be activated.
● Vehicles that cut in suddenly
● Vehicles traveling at low speeds
● Vehicles that are not moving in the same lane

2944-5. Using the driving support systems
Cruise control
Use the cruise control to maintain a set speed without depressi ng the
accelerator pedal.
Indicators
Cruise control switch
Press the “ON-OFF” button to
activate the cruise control.
Cruise control indicator will come
on.
Press the button again to deacti-
vate the cruise control.
Accelerate or decelerate the
vehicle to the desired speed,
and push the lever down to set
the speed.
“SET” indicator will come on.
The vehicle speed at the moment
the lever is released becomes the
set speed.
: If equipped
Summary of functions
1
2
Setting the vehicle speed
1
2

2964-5. Using the driving support systems
■Cruise control can be set when
●The shift lever is in D or range 4 or higher of S has been sele cted.
● Vehicle speed is above approximately 25 mph (40 km/h).
■ Accelerating after setting the vehicle speed
●The vehicle can be accelerated normally. After acceleration, th e set speed
resumes.
● Even without canceling the cruise control, the set speed can be increased
by first accelerating the vehicle to the desired speed and then pushing the
lever down to set the new speed.
■ Automatic cruise co ntrol cancelation
Cruise control will stop maintaining the vehicle speed in any o f the following
situations.
● Actual vehicle speed falls more than approximately 10 mph (16 k m/h) below
the preset vehicle speed.
At this time, the memorized set speed is not retained.
● Actual vehicle speed is below approximately 25 mph (40 km/h).
● VSC is activated.
● TRAC is activated for a period of time.
● When the VSC or TRAC system is turned off.
● 4WD models: The operation cannot be switched for 5 seconds or m ore after
operating the front-wheel drive control switch.
■ If “Cruise Control Malfunction Vi sit Your Dealer” is displayed on the
multi-information display
Press the “ON-OFF” button once to deactivate the system, and th en press
the button again to reactivate the system.
If the cruise control speed cannot be set or if the cruise cont rol cancels imme-
diately after being activated, there may be a malfunction in th e cruise control
system. Have the vehicle inspected by your Toyota dealer.

2974-5. Using the driving support systems
4
Driving
WARNING
■To avoid operating the cruise control by mistake
Switch the cruise control off using the “ON-OFF” button when not in use.
■ Situations unsuitable for cruise control
Do not use cruise control in any of the following situations.
Doing so may result in loss of control and could cause an accid ent resulting
in death or serious injury.
● 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 hills
Vehicle speed may exceed the set speed when driving down a stee p hill.
● When your vehicle is towing a trailer or during emergency towin g

4967-2. Steps to take in an emergency
Indicates that all maintenance according to the
driven distance on the maintenance schedule
*
should be performed soon.
Comes on approximately 4500 miles (7200 km)
after the message has been reset.
If necessary, perfo rm maintenance.
Indicates that all maintenance is required to cor-
respond to the driven distance on the mainte-
nance schedule
*.
Comes on approximately 5000 miles (8000 km)
after the message has been reset.
(The indicator will not work properly unless the
message has been reset.)
 Perform the necessary maintenance.
Please reset the message after the mainte-
nance is performed. ( P. 407)
Indicates a malfunction in the tire pressure warn-
ing system.
The tire pressure warning light comes on after
flashing for 1 minute.
 Have the vehicle inspected by your Toyota
dealer.
Indicates a malfunction in the cruise control sys-
tem.
• Press the “ON-OFF” button once to deacti-
vate the system, and then press the button
again to reactivate the system.
• A buzzer also sounds.
 Have the vehicle inspected by your Toyota
dealer immediately.
Indicates a malfunction in the Brake Override
System.
A buzzer also sounds.
 Have the vehicle inspected by your Toyota
dealer immediately.
Indicates that the accelerator and brake pedals
are being depressed simultaneously, and the
Brake Override System is operating. ( P. 185)
 Release the accelerator pedal and depress
the brake pedal.
Warning messageDetails/Actions
Maintenance
Required Soon
Maintenance Required
Visit Your Dealer
Tire Pressure Warning System
Malfunction, Visit Your Dealer
(Flashes
and then
remains on)
Cruise Control Malfunction
Visit Your Dealer
Brake Override Malfunction
Visit Your Dealer
Accelerator and Brake Pedals
Pressed
Simultaneously

4987-2. Steps to take in an emergency
(If equipped)
Indicates that radar cruise control sensor is dirty
or covered with ice.A buzzer also sounds.
 Clean the sensor.
(If equipped)
Indicates that the dynamic radar cruise control
system cannot be used temporarily due to bad
weather
A buzzer also sounds.
 Use the dynamic radar cruise control sys-
tem when it becomes available again.
(If equipped)
Indicates that the RCTA (Rear Cross Traffic Alert)
sensors or the surrounding area on the bumper is
dirty or covered with ice (if equipped)
A buzzer also sounds.
 Clean the sensor and its surrounding area
on the bumper.
(If equipped)
The operation conditions of the front camera
(temperature, etc.) are not met.
 When the operation conditions of the front
camera (temperature, etc.) are met, the fol-
lowing systems will become available.
(P. 258, 485)
• PCS (Pre-Collision System)
• LDA (Lane Departure Alert) system
• Dynamic radar cruise control
• Automatic High Beam
(If equipped)
Indicates that dirt, rain, condensation, ice, snow,
etc., are present on the windshield in front of the
front camera. The following systems may be sus-
pended until the problem shown in the message
is resolved. ( P. 258, 485)
• PCS (Pre-Collision System)
• LDA (Lane Departure Alert) system
• Dynamic radar cruise control
• Automatic High Beam
 Tum the system off, remove any dirt, rain,
condensation, ice, snow, etc., from the
windshield, and then turn the system back
on.
Warning messageDetails/Actions
Radar Cruise
Control
Unavailable
Clean Sensor
Radar Cruise Control
Unavailable
Rear Cross Traffic Alert Unavailable
Front Camera Unavailable
(Yellow)
Front Camera
Unavailable
See Owner’s Manual
(Yellow)

5017-2. Steps to take in an emergency
7
When trouble arises
*: Refer to the separate “Scheduled Maintenance Guide” or “Owner’s Manual
Supplement” for the maintenance interval applicable to your veh icle.
■Warning message in radar cruise mode (if equipped)
In the following cases, the warning message may not be displaye d even if
vehicle-to-vehicle distance decreases:
● When your vehicle and the vehicle ahead are traveling at the sa me speed or
the vehicle ahead is traveling more quickly than your vehicle
● When the vehicle ahead is traveling at a very low speed
● Immediately after cruise control speed is set
● At the instant the accelerator pedal is depressed
■
Conditions that the tire pressure warning system may not functi on
properly
 P. 4 3 2
Indicates that an internal switch failure of trailer
brake control system, an over current detected by
trailer brake control system.
 Have the vehicle inspected by your Toyota
dealer immediately.
Indicates that an internal microprocessor error,
output circuit to trailer brakes unintended current,
or manual brake output slider is stuck or broken
 Have the vehicle inspected by your Toyota
dealer immediately.
Indicates that the output circuit has reverse volt-
age, or the internal trailer brake control system
temperature is too high.
Check trailer wiring issue, check trailer
connection. If there is still a problem, have
the vehicle inspected by your Toyota dealer
immediately.
Warning messageDetails/Actions
Trailer Brake Error.
If Towing,
Come to a Safe Stop
Contact dealer.
Trailer Wiring,
Type, or Connection
fault.
See Owner’s manual.