2011 TOYOTA TUNDRA engine

245
2-4. Using other
driving systems
2
When driving
To disable VSC, Trailer Sway Control and/or TRAC (2WD models
and 2WD mode on 4WD models)
If the vehicle gets stuck in fresh snow or mud, VSC, Trailer Sway
Control and TRAC may reduce power from the engine to the wheels.
You may need to turn the system off to enable you to rock the vehicle
in order to free it.
■ TRAC OFF mode
Press the VSC OFF switch
briefly.
The AUTO LSD indicator will
come on.
The system is in TRAC off, AUTO
LSD on and VSC, Trailer Sway
Control on mode.
Push the switch again to turn the
system back on.
■AUTO LSD mode
Stop the vehicle completely, and
press the VSC OFF switch for
more than 3 seconds, when the
system is in the TRAC OFF
mode.
The VSC OFF and AUTO LSD
indicators will come on.
The system is in TRAC off, AUTO
LSD on and VSC, Trailer Sway
Control off mode.

246 2-4. Using other driving systems
■VSC OFF mode
Stop the vehicle completely, and
press the VSC OFF switch for
more than 3 seconds, when the
system is in the AUTO LSD
mode.
The VSC OFF and TRAC OFF
indicators will come on.
The system is all off mode.
To disable VSC, Trailer Sway Control or A-TRAC (4H mode on 4WD models)
If the vehicle gets stuck in fresh snow or mud, VSC, Trailer Sway
Control or A-TRAC may reduce power from the engine to the wheels.
You may need to turn the system off to enable you to rock the vehicle
in order to free it.
■A-TRAC OFF mode
Press the VSC OFF switch
briefly.
The TRAC OFF indicator will
come on.
The system is in A-TRAC off and
VSC, Trailer Sway Control on
mode.
Push the switch again to turn the
system back on.

247
2-4. Using other
driving systems
2
When driving
■VSC OFF mode
Stop the vehicle completely, and
press the VSC OFF switch for
more than 3 seconds.
The VSC OFF and TRAC OFF
indicators will come on.
The system is all off mode.
Push the switch again to turn the
system back on.
To disable A-TRAC (4L mode on 4WD models)
If the vehicle gets stuck in fresh snow or mud, A-TRAC may reduce
power from the engine to the wheels. You may need to turn the sys-
tem off to enable you to rock the vehicle in order to free it. Stop the vehicle completely, and
press the VSC OFF switch for
more than 3 seconds.
The TRAC OFF indicators will
come on.
Push the switch again to turn the
system back on.

248 2-4. Using other driving systems
■Automatic reactivation of TRAC, A-TRAC, VSC and Trailer Sway Con-
trol
Turning the engine switch off after turning off the TRAC, A-TRAC, VSC and
Trailer Sway Control systems will automatically re-enable them.
■ Sounds and vibrations caused by the ABS, TRAC, A-TRAC, VSC,
Trailer Sway Control and Brake Assist system
● A sound may be heard from the engine compartment when the engine is
started and just after the vehicle begins to move. This sound does not
indicate that a malfunction has occurred in any of these systems.
● Any of the following conditions may occur when the above systems are
operating. None of these indicates that a malfunction has occurred.
• Vibrations may be felt through the vehicle body and steering.
• A motor sound may be heard after the vehicle comes to a stop.
• The brake pedal may pulsate slightly after the ABS is activated.
• The brake pedal may move down slightly after the ABS is activated.
■ If the brake system overheats
TRAC or A-TRAC will cease operation, and the slip indicator will change
from flashing to being on continuously to alert the driver. Stop the vehicle in
a safe place. (There is no problem with continuing normal driving.)
■ Shifting to 4L
VSC and Trailer Sway Control are automatically turned off.

255
2-5. Driving information
2
When driving
NOTICE
■
To prevent the water damage
●Take all necessary safety measures to ensure that water damage to the
engine or other components does not occur.
● Water entering the engine air intake will cause severe engine damage.
● Water entering the automatic transmission will cause deterioration in shift
quality, locking up of your transmission accompanied by vibration, and ulti-
mately damage.
● Water can wash the grease from wheel bearings, causing rusting and pre-
mature failure, and may also enter the differentials, transmission and
transfer case, reducing the gear oil’s lubricating qualities.
■ When you drive through water
If driving through water, such as when crossing shallow streams, first check
the depth of the water and the bottom of the river bed for firmness. Drive
slowly and avoid deep water.
■ Inspection after off-road driving
●Sand and mud that has accumulat ed in brake drums and around brake
discs may affect braking efficiency and may damage brake system compo-
nents.
● Always perform a maintenance inspection after each day of off-road driv-
ing that has taken you through rough terrain, sand, mud, or water. For
scheduled maintenance information, refer to the “Scheduled Maintenance
Guide” or “Owner’s Manual Supplement”.

261
2-5. Driving information
2
When driving
Winter driving tips
Carry out the necessary preparations and inspections before driving
the vehicle in winter. Always drive the vehicle in a manner appropri-
ate to the prevailing weather conditions.
■ Pre-winter preparations
●Use fluids that are appropriate to the prevailing outside tem-
peratures.
• Engine oil
• Engine coolant
• Washer fluid
● Have a service technician inspect the level and specific grav-
ity of battery electrolyte.
● Have the vehicle fitted with four snow tires or purchase a set
of tire chains for the rear tires.
Ensure that all tires are the same size and brand, and that chains
match the size of the tires.
■Before driving the vehicle
Perform the following according to the driving conditions.
●Do not try to forcibly open a window, scrape an outside rear
view mirror surface or move a wiper or outside rear view mir-
ror that is frozen. Pour warm water over the frozen area to
melt the ice. Wipe away the water immediately to prevent it
from freezing.
● To ensure proper operation of th e climate control system fan,
remove any snow that has accumulated on the air inlet vents
in front of the windshield.
● Remove any ice that has accumu lated on the vehicle chassis.
● Periodically check for and remove any excess ice or snow
that may have accumulated in the wheel well or on the
brakes.

262 2-5. Driving information
Selecting tire chainsUse the correct tire chain size when mounting the snow chains.
Chain size is regulated for each tire size.
Side chain
0.2 in. (5 mm) in diameter
Cross chain
0.25 in. (6.3 mm) in diameter
■When driving the vehicle
Accelerate the vehicle slowly and drive at a reduced speed suit-
able to road conditions.
■ When parking the vehicle
Park the vehicle and move the shift lever to P without setting the
parking brake. The parking brak e may freeze up, preventing it
from being released. If necessary , block the wheels to prevent
inadvertent sliding or creeping.
■ Refueling (Flex-fuel vehicles)
Observe the following precautions when switching fuels, in order
to maintain starting and driving performance.
●Do not change fuels when the fuel level is 1/4 or less.
● Always add at least 2.6 gal. (10 L) of fuel.
● After fulling up with fuel, warm up the engine or drive the vehi-
cle for at least 5 minutes or 7 miles (11 km).
● Do not accelerate rapidly immediately after refueling.

270 2-5. Driving information
Confirm that the gross trailer weight, gross combination weight, gross
vehicle weight, gross axle weight and tongue weight are all within the
limits.
■GCWR
* and TWR*
Regular Cab models
*: These models meet the tow-vehicle trailering requirement of SAE
International per SAE J2807.
Model code*1EngineDriving
systemBed
typeGCWRTWR
GSK50L-TRADKA 4.0L V6
(1GR-FE) engine 2WDStandard
10000 lb.
(4535 kg) 4900 lb.
(2220 kg)
GSK51L-THADKA Long 4800 lb.
(2175 kg)
UPK50L-TRTDKA 4.6L V8
(1UR-FE) engine
2WDStandard
12500 lb.
(5670 kg)
*27100 lb.
(3220 kg)*2
14000 lb.
(6350 kg)*38600 lb.
(3900 kg)*3
USK51L-THTDKA
5.7L V8
(3UR-FE) engine Long
14000 lb.
(6350 kg)
*28400 lb.
(3810 kg)*2
16000 lb.
(7255 kg)*310400 lb.
(4715 kg)*3
USK55L-TRTDKA
4WDStandard 14000 lb.
(6350 kg)
*28200 lb.
(3715 kg)*2
15500 lb.
(7030 kg)*39700 lb.
(4395 kg)*3
15000 lb.
(6800 kg)*3,49200 lb.
(4170 kg)*3,4
USK56L-THTDKA Long14000 lb.
(6350 kg)
*28100 lb.
(3670 kg)*2
16000 lb.
(7255 kg)*310100 lb.
(4580 kg)*3