2018 TOYOTA TUNDRA brake sensor

2744-5. Using the driving support systems
WARNING
■Sensor detection information
Pay particular attention to the following instances in where th is may occur.
Failing to do so way result in the vehicle being unable to be d riven or parked
safety and possibly cause an accident.
● The sensor’s detection areas are limited to the areas around the vehicle’s
front corner and rear bumpers.
● Certain vehicle conditions and the surrounding environment may affect the
ability of the sensor to correctly detect obstacles. Particular instances
where this may occur are listed below.
• There is dirt, snow or ice on the sensor. (Wiping the sensors will resolve
this problem.)
• The sensor is frozen. (Thawing the area will resolve this prob lem.)
• The sensor is covered in any way.
• The vehicle is leaning considerably to one side.
• On an extremely bumpy road, on an incline, on gravel, or on grass.
• The vicinity of the vehicle is noisy due to vehicle horns, mot orcycle
engines, air brakes of large vehicles, or other loud noises pro ducing
ultrasonic waves.
• There is another vehicle equipped with parking assist sensors in the
vicinity.
• The sensor is coated with a sheet of spray or heavy rain.
• The vehicle is equipped with a fender pole or radio antenna.
• The bumper or sensor receives a strong impact.
• The vehicle is approaching a tall or curved curb.
• In harsh sunlight or intense cold weather.
• The area directly under the bumpers is not detected.
• If obstacles draw too close to the sensor.
• A non-genuine Toyota suspension (lowered suspension, etc.) is installed.
• A backlit license plate, license plate holder, etc., are insta lled.
• People may not be detected if they are wearing certain types a nd color-
ing of clothing.
• People, animals, and moving objects may not be able to be detected.
In addition to the examples above, there are instances in which , because of
their shape, signs and other objects may be judged by the senso r to be
closer than they are.

3104-5. Using the driving support systems
Using the GAIN (+/-) selection
buttons, set a starting gain of
5.0.
While driving 20 - 25 mph [35 - 40 km/h], fully apply the
manual
TRAILER BRAKE OUTPUT
slider.
Adjust the gain setting, using t he GAIN (+/-) selection buttons , to
either increase or decrease to j ust below the point of trailer wheel
lock-up.
For confirmation, repeat steps and until desired gain setting
is reached (just below point of trailer wheel lock-up).
■ When using the trailer brake control system
Please turn off the intuitive parking assist while towing a tra iler. If left on,
sonar sensors will detect the trailer being towed.
■ When setting the gain
Wheel lock-up occurs when the trailer wheel squeals or tire smo ke occurs.
Trailer wheels may not lock-up while driving heavily loaded trailer. During this
case, adjust the Trailer gain to the highest allowable setting for the towing
condition.
■ When disconnecting and reco nnecting battery terminals
The gain setting data will be reset.
5
6
7
867

5518-2. Steps to take in an emergency
8
When trouble arises
Front passenger’s seat belt buzzer:
The front passenger’s seat belt buzzer sounds to alert the front passenger
that his or her seat belt is not fastened. The buzzer sounds on ce if the
vehicle reaches a speed of 12 mph (20 km/h). If the seat belt is sill unfas-
tened after 30 seconds, the buzzer will sound intermittently fo r 10 seconds.
Then, if the seat belt is still unfastened, the buzzer will sou nd in a different
tone for 20 more seconds.
*2: Parking brake engaged warning buzzer:
A buzzer will sound if the vehicle is driven at a speed of approximately
3 mph (5 km/h) or more.
■ SRS warning light
This warning light system monitors the airbag sensor assembly, front impact
sensors, side impact sensors (front door), side impact sensors (rear), driver’s
seat position sensor, driver’s seat belt buckle switch, front passenger occu-
pant classification system (ECU and sensors), “AIR BAG ON” indi cator light,
“AIR BAG OFF” indicator light, front passenger’s seat belt buck le switch, seat
belt pretensioners assemblies, airbags, interconnecting wiring and power
sources. ( P. 40)
■ Front passenger detection sensor, seat belt reminder and warnin g
buzzer
● If luggage is placed on the front passenger seat, the front pas senger detec-
tion sensor may cause the warning light to flash and the warnin g buzzer to
sound even if a passenger is not sitting in the seat.
● If a cushion is placed on the seat, the sensor may not detect a passenger,
and the warning light may not operate properly.
■ If the malfunction indicator lamp comes on while driving
First check the following:
●Is the fuel tank empty?
If it is, fill the fuel tank immediately.
● Is the fuel tank cap loose?
If it is, tighten it securely.
The light will go off after several driving trips.
If the light does not go off even after several trips, contact your Toyota dealer
as soon as possible.

5578-2. Steps to take in an emergency
8
When trouble arises
(If equipped)
Indicates a malfunction in the intuitive parking
assistThe malfunctioning assist-sensor is flashing.
 Have the vehicle inspected by your Toyota
dealer immediately.
(If equipped)
Indicates a malfunction in the Blind Spot Monitor
A buzzer also sounds.
 Have the vehicle inspected by your Toyota
dealer immediately.
Indicates that one or more of the doors or the
hood is not fully closed
The system also indicates which doors are not
fully closed.
If the vehicle reaches a speed of 3 mph
(5 km/h), flashes and a buzzer
sounds to indicate that the door(s) are not
yet fully closed.
 Make sure that all the doors and the hood
are closed.
Indicates that the automatic transmission fluid
temperature is to high
A buzzer also sounds.
 Immediately stop the vehicle in a safe
place, shift the shift lever to P and wait until
the light goes off.
If the light goes off, you may start the vehi-
cle again. If the light does not go off, con-
tact your Toyota dealer.
Indicates that the parking brake is still engaged
If the vehicle reaches a speed of 3 mph
(5 km/h), flashes and a buzzer
sounds to indicate that the parking brake is
still engaged.
 Release the parking brake.
Warning messageDetails/Actions
Parking Assist
Malfunction
Blind Spot Monitor Malfunction
Visit Your Dealer
High Transmission Fluid Temp
See Owner’s Manual
Release
Parking Brake
(U.S.A) (Canada)

5638-2. Steps to take in an emergency
8
When trouble arises
(If equipped)
Indicates that, since the VSC (Vehicle Stability
Control) system was turned off, the pre-collision
brake system operation is stopped.
Turn the VSC on. ( P. 304)
(If equipped)
Indicates that the pre-collision system is tempo-
rarily unavailable.
Please wait until the system returns. If the
message does not disappear, the system
may be malfunctioning. Have the vehicle
inspected by your Toyota dealer immedi-
ately.
(If equipped)
Indicates that the pre-collision system sensor is
dirty, covered with ice, etc.
Remove any dirt, ice, etc.
Indicates a malfunction in the RCTA (Rear Cross
Traffic Alert).
A buzzer also sounds.
 Have the vehicle inspected by your Toyota
dealer.
Indicates that the VSC ECU or G sensor is not
communicating with trailer brake control system.
Indicates a malfunction in the VSC system.
Have the vehicle inspected by your Toyota
dealer immediately.
Warning messageDetails/Actions
VSC Turned Off
Pre-Collision Brake
System
Unavailable
Pre-Collision System Unavailable
Pre-Collision System Unavailable
Clean Sensor
Rear Cross Traffic Alert Malfunction
Visit Your Dealer
Trailer Brake Error. If Towing,
Come to a Safe Stop
with Manual Controls.
Contact dealer.

655What to do if... (Troubleshooting)
●It is locked to prevent theft of the vehicle if the key is removed from the
engine switch. ( P. 196)
●Is the window lock switch pressed?
The power window except for the one at the driver’s seat cannot be oper-
ated if the window lock switch is pressed. ( P. 147)
●The seat belt reminder light is flashing
Are the driver and the front passenger wearing the seat belts? (P. 548)
●The parking brake indicator is on
Is the parking brake released? ( P. 205)
Depending on the situation, other types of warning buzzer may also sound.
( P. 547, 555)
●Did anyone inside the vehicle open a door during setting the al arm?
The sensor detects it and the alarm sounds. ( P. 85)
To stop the alarm, turn the engine switch to the “ACC” or “ON” position, or
start the engine.
●When a warning light turns on or a warning message is displayed , refer to
P. 547, 555.
The steering wheel cannot be turned after the engine is
stopped
The windows do not open or close by operating the power
window switches
A warning buzzer sounds during driving
An alarm is activated and the horn sounds
A warning light turns on or a warning message is displayed

665Alphabetical index
Parking assist sensors (intuitive parking assist) ....... 270
Parking brake ........................... 205 Operation .............................. 205
Parking brake engaged
warning buzzer ................... 547
Parking brake engaged
warning message ............... 557
Parking lights ........................... 206 Light switch ........................... 206
Replacing light bulbs..... 527, 534
Wattage ................................ 609
PCS
(Pre-Collision System) .......... 231 Pre-collision brake assist ...... 232
Pre-collision braking ............. 232
PCS warning ......................... 232
Warning light ......................... 550
Warning message ................. 555
Pen holder ................................ 439
Personal lights ......................... 430 Light switch ........................... 430
Wattage ................................ 609
Power back window ................ 151
Power easy access system .... 128
Power outlets ........................... 452
Power steering fluid ................ 491
Power windows........................ 147 Jam protection function......... 148
Operation .............................. 147
Window lock switch............... 147
Pre-Collision System (PCS) ...................................... 231 Radar cruise control
(dynamic radar
cruise control) ....................... 252
Radiator .................................... 490
Radio ........................................ 340
Rear personal lights ................ 430
Rear seat
Adjustment precautions ........ 127
Child seats/child restraint system installation . ............... 60
Cleaning ............................... 473
Head restraints ..................... 132
Raising the bottom cushion ............................... 126
Rear side marker lights........... 206 Light switch ........................... 206
Replacing light bulbs ............ 532
Wattage ................................ 609
Rear step bumper .................... 122
Rear turn signal lights ............ 204
Replacing light bulbs ............ 532
Turn signal lever ................... 204
Wattage ................................ 609
Rear view mirror Inside rear view mirror .......... 139
Outside rear view mirrors ..... 142
Rear view monitor system ...... 277
Refueling .................................. 220 Capacity................................ 601
Fuel types ............................. 601
Opening the fuel tank cap..... 220
PR