2020 TOYOTA TUNDRA four wheel drive

3
1
9 8
7 5 4
3
2
6
4-1. Before drivingDriving the vehicle ............. 184
Cargo and luggage............ 192
Vehicle load limits ............. 195
Trailer towing..................... 197
Dinghy towing.................... 216
4-2. Driving procedures Engine (ignition) switch (vehicles without
a smart key system) ........ 217
Engine (ignition) switch (vehicles with a smart
key system) ..................... 219
Automatic transmission ..... 225
Turn signal lever................ 232
Parking brake .................... 233
4-3. Operating the lights and wipers
Headlight switch ................ 234
Automatic High Beam ....... 239
Fog light switch ................. 244
Windshield wipers and washer ............................ 245
4-4. Refueling Opening the fuel tank cap .................................. 248 4-5. Using the driving support
systems
Toyota Safety Sense P ...... 252
PCS (Pre-Collision System) ........................... 259
LDA (Lane Departure Alert) ................................ 272
Dynamic radar cruise control.............................. 280
Cruise control .................... 294
Intuitive parking assist ....... 298
BSM (Blind Spot Monitor)......... 305
Four-wheel drive system ... 315
AUTO LSD system ............ 318
Driving assist systems ....... 320
Trailer brake controller....... 327
4-6. Driving tips Winter driving tips .............. 331
Off-road precautions .......... 335
4Driving

183
4Driving
4-1. Before drivingDriving the vehicle ............. 184
Cargo and luggage ........... 192
Vehicle load limits ............. 195
Trailer towing..................... 197
Dinghy towing ................... 216
4-2. Driving procedures Engine (ignition) switch(vehicles without
a smart key system) ........ 217
Engine (ignition) switch (vehicles with
a smart key system) ........ 219
Automatic transmission ..... 225
Turn signal lever................ 232
Parking brake .................... 233
4-3. Operating the lights and wipers
Headlight switch ................ 234
Automatic High Beam ....... 239
Fog light switch ................. 244
Windshield wipers and washer ............................ 245
4-4. Refueling Opening the fuel tank cap .................................. 248 4-5. Using the driving support
systems
Toyota Safety Sense P ..... 252
PCS (Pre-Collision System)........................... 259
LDA (Lane Departure Alert) ............................... 272
Dynamic radar cruise control ............................. 280
Cruise control .................... 294
Intuitive parking assist....... 298
BSM (Blind Spot Monitor) ........ 305
Four-wheel drive system ... 315
AUTO LSD system............ 318
Driving assist systems ...... 320
Trailer brake controller ...... 327
4-6. Driving tips Winter driving tips ............. 331
Off-road precautions ......... 335

1854-1. Before driving
4
Driving
■Driving in the rain
●Drive carefully when it is raining, because visibility will be reduced, the win-
dows may become fogged-up, and the road will be slippery.
● Drive carefully when it starts to rain, because the road surface will be espe-
cially slippery.
● Refrain from high speeds when driving on an expressway in the r ain,
because there may be a layer of water between the tires and the road sur-
face, preventing the steering and brakes from operating properl y.
■ Engine speed while driving
In the following conditions, the engine speed may become high w hile driving.
This is due to automatic up-shifting control or down-shifting implementation to
meet driving conditions. It does not indicate sudden acceleration.
● The vehicle is judged to be driving uphill or downhill
● When the accelerator pedal is released
● When the brake pedal is depressed while TOW/HAUL mode is select ed (if
equipped)
■ Restraining the engine out put (Brake Override System)
● When the accelerator and brake pedals are depressed at the same time, the
engine output may be restrained.
● A warning message is displayed on the multi-information display while the
system is operating.
■ Restraining sudden start (Drive-Start Control)
● When the following unusual operation is performed, the engine o utput may
be restrained.
• When the shift lever is shifted from R to D, D to R, N to R, P to D, or P to
R (D includes S) with the accelerator pedal depressed, a warnin g mes-
sage appears on the multi-information display.
• When the accelerator pedal is depressed too much while the veh icle is in
reverse.
●
While Drive-Start Control is being activated, your vehicle may have trouble
escaping from the mud or fresh snow. In such case, perform the following
actions to cancel Drive-Start Co ntrol so that the vehicle may become able to
escape from the mud or fresh snow.
•Deactivate TRAC (P. 323)
• When the AUTO LSD system is turned on. (P. 318)
• 4WD models: The four-wheel drive control switch is in “4L” pos ition.
(P. 315)

2654-5. Using the driving support systems
4
Driving
■Operational conditions
The pre-collision system is enabled and the system determines that the pos-
sibility of a frontal collision with a vehicle or pedestrian is high.
Each function is operational at the following speeds:
● Pre-collision warning:
• Vehicle speed is between approximately 7 and 110 mph (10 and 1 80 km/h).
(For detecting a pedestrian, vehicle speed is between approximately 7 and
50 mph [10 and 80 km/h].)
• The relative speed between your vehicle and the vehicle or ped estrian
ahead is approximately 7 mph (10 km/h) or more.
● Pre-collision brake assist:
• Vehicle speed is between approximately 20 and 110 mph (30 and 180 km/h).
(For detecting a pedestrian, vehicle speed is between approxima tely 20 and
50 mph [30 and 80 km/h].)
• The relative speed between your vehicle and the vehicle or ped estrian
ahead is approximately 20 mph (30 km/h) or more.
● Pre-collision braking:
• Vehicle speed is between approximately 7 and 110 mph (10 and 1 80 km/h).
(For detecting a pedestrian, vehicle speed is between approximately 7 and
50 mph [10 and 80 km/h].)
• The relative speed between your vehicle and the vehicle or ped estrian
ahead is approximately 7 mph (10 km/h) or more.
The system may not operate in the following situations:
● If a battery terminal has been disconnected and reconnected and then the
vehicle has not been driven for a certain amount of time
● If the shift lever is in R
● If VSC is disabled (only the pre-collision warning function will be opera-
tional)
● If the low speed four-wheel drive indicator is illuminated (onl y the pre-colli-
sion warning function will be operational)
■ Pedestrian detection function
The pre-collision system detects pedestri-
ans based on the size, profile, and motion
of a detected object. However, a pedes-
trian may not be detected depending on
the surrounding brightness and the
motion, posture, and angle of the
detected object, preventing the system
from operating properly. (P. 270)

3154-5. Using the driving support systems
4
Driving
Four-wheel drive system
Use the front-wheel drive control switch to select the following transfer
modes:“2WD” (high speed position, two-wheel drive)
Use this for normal driving on dry hard-surfaced roads. This po sition
gives greater economy, quietest ride and least wear.
“4H” (high speed position, four-wheel drive)
Use this for driving only on tracks that permit the tires slide, like off-road,
icy or snow-covered roads. This position provides greater traction than
two-wheel drive.
The “4HI” indicator will come on.
“4L” (low speed position, four-wheel drive)
Use this for maximum power and traction. Use “4L” for climbing or
descending steep hills, off-road driving, and hard pulling in s and, mud or
deep snow.
The “4LO” indicator will come on.
: If equipped
Summary of functions
1
2
3

3174-5. Using the driving support systems
4
Driving
■When the front-wheel drive cont rol switch is shifted to “4L”
VSC is automatically turned off.
■ If the “4HI” indicator flashes
The transfer mode may not successfully change. Drive straight a head while
accelerating or decelerating, or drive in reverse.
■ If the “4LO” indicator continues to flash
The transfer mode may not successfully change. Operate the fron t-wheel
drive control switch again.
■ If the “4LO” indicator continues to flash and a buzzer sounds
The shift lever is not in N and/or the vehicle is moving. Stop the vehicle com-
pletely, shift the shift lever to N and make sure that the indi cator stops flash-
ing.
■ If the “4HI” or “4LO” indicator flashes rapidly
There may be a malfunction in the four-wheel drive system. Have the vehicle
inspected by your Toyota dealer immediately.
■ Four-wheel drive usage frequency
You should drive in four-wheel drive for at least 10 miles (16 km) each month.
This will assure that the front drive components are lubricated .
WARNING
■Shifting the front-wheel drive control switch from “2WD” to “4H ” while
driving
Never operate the front-wheel drive control switch if the wheels are slipping.
Stop the slipping or spinning before shifting.
■ When the vehicle is parked
If the shift lever is moved before the “4LO” indicator turns on/off, the transfer
mode may not be shifted completely. The transfer mode disengage s both
the front and rear driveshafts from the powertrain and allows t he vehicle to
move regardless of the shift position. (At this time, the indic ator blinks and
the buzzer sounds.)
Therefore, the vehicle is free to roll even if the automatic tr ansmission is in
P. You or someone else could be seriously injured. You must com plete the
shifting of the transfer mode before placing transmission in P.

4797-2. Steps to take in an emergency
7
When trouble arises
WARNING
Observe the following precautions.
Failure to do so may result in death or serious injury.
■When towing the vehicle
■ While towing
● When towing using cables or chains, avoid sudden starts, etc. w hich place
excessive stress on the towing hooks, cables or chains. The tow ing hooks,
cables or chains may become damaged, broken debris may hit peop le,
and cause serious damage.
● Do not turn the engine switch to OFF.
There is a possibility that the steering wheel is locked and ca nnot be oper-
ated.
2WD models: Be sure to transport the
vehicle with all four wheels raised off the
ground. If the vehicle is towed with the
tires contacting the ground, the drivetrain
and related parts may be damaged or an
accident may occur due to a change in
direction of the vehicle.
4WD models: Be sure to transport the
vehicle with all four wheels raised off the
ground. If the vehicle is towed with the
tires contacting the ground, the drivetrain
or related parts may be damaged, the
vehicle may fly off the truck.

599Alphabetical index
If the warning message is displayed......................... 491
If you have a flat tire ............. 504
If you lose your keys ............. 123
If you think something
is wrong .............................. 481
If your vehicle becomes
stuck ................................... 530
If your vehicle has to be stopped in an emergency ... 473
If your vehicle needs to be towed ......................... 476
If your vehicle overheats ....... 527
Emergency flashers ................ 472
Engine “ACC” position ...................... 217
Compartment ........................ 415
Engine switch........................ 217
Hood ..................................... 414
How to start the engine ......... 217
Identification number ............ 539
If the engine will not start ...... 519
Ignition switch
(engine switch) ................... 217
Immobilizer system ................. 85
Overheating .......................... 527
Engine coolant ......................... 418 Capacity ................................ 543
Checking ............................... 418
Preparing and checking before winter....................... 331
Engine coolant temperature gauge...................................... 105
Engine immobilizer system ...... 85
Engine oil ................................. 416
Capacity ................................ 541
Checking ............................... 416
Preparing and checking before winter....................... 331
Engine oil maintenance
data ......................................... 407
Engine switch (ignition switch)..................... 217 Engine switch light
(ignition switch light) ............ 357
Event data recorder (EDR)........ 11
Flat tire ..................................... 504
Floor mats .................................. 30
Fluid
Automatic transmission ........ 544
Brake .................................... 545
Washer ................................. 425
Fog lights ................................. 244 Replacing light bulbs ............ 464
Switch ................................... 244
Wattage ................................ 548
Foot well light .......................... 357
Four-wheel drive system ........ 315
Front passenger occupant classification system .............. 53
Front personal lights............... 358
Front seats ............................... 147 Adjustment............................ 147
Cleaning ............................... 403
Correct driving posture ........... 32
Driving position memory ....... 152
Head restraints ..................... 157
Power easy access system .......... ...................... 152
Seat heaters ......................... 354
Seat position memory ........... 152
Seat ventilators ..................... 354
Front side marker lights Light switch ........................... 234
Replacing light bulbs ............ 462
Wattage ................................ 548
Front turn signal lights Replacing light bulbs ............ 461
Turn signal lever ................... 232
Wattage ................................ 548
F