2015 TOYOTA TUNDRA brake

1584-1. Before driving
Trailer towing
Contact your Toyota dealer for further information about additional
requirements such as a towing kit, etc.
Your vehicle is designed primarily as a passenger-and-load-car-
rying vehicle. Towing a trailer can have an adverse impact on
handling, performance, braking, durability, and fuel consump-
tion. For your safety and the safe ty of others, you must not over-
load your vehicle or trailer. You must also ensure that you are
using appropriate towing equipmen t, that the towing equipment
has been installed correctly a nd used properly, and that you
employ the requisite driving habits.
Vehicle-trailer stability and braking performance are affected by
trailer stability, brake performance and setting, trailer brakes,
the hitch and hitch systems (if equipped).
To tow a trailer safely, use extreme care and drive the vehicle in
accordance with your trailer’s characteristics and operating
conditions.
Toyota warranties do not apply to damage or malfunction
caused by towing a trailer for commercial purposes.

1604-1. Before driving
■TWR (Trailer Weight Rating)
The maximum allowable gross
trailer weight. The gross trailer
weight is the sum of the trailer
weight and the weight of the
cargo in the trailer.
TWR is calculated assuming
base vehicle with one driver,
one front passenger, towing
package (if available), hitch and
hitch systems (if required).
Additional optional equipment, passengers and cargo in the vehicle will
reduce the trailer weight rating so as not to exceed GCWR, GVWR and
GAWR.
If the gross trailer weight exceeds 3000 lb. (1360 kg), it is recommended
to use a trailer with 2 or more axles.
■
Unbraked TWR (Unbraked Trailer Weight Rating)
The trailer weight rating for tow-
ing a trailer without a trailer ser-
vice brake system.
■Tongue Weight
The load placed on the trailer
hitch ball. ( P. 167)
(With brakes)
(Without brakes)

1614-1. Before driving
4
Driving
■Kingpin Weight
The load placed on the 5th
wheel mount or the gooseneck
ball. (P. 168)
● The gross trailer weight must never exceed the TWR described in
the table. ( P. 162)
● The gross combination weight must never exceed the GCWR
described in the table. ( P. 162)
● The gross vehicle weight must
never exceed the GVWR indi-
cated on the Certification Label.
● The gross axle weight on each
axle must never exceed the
GAWR indicated on the Certifi-
cation Label.
● If the gross trailer weight is over the unbraked TWR, trailer service
brakes are required.
● If the gross trailer weight is over 2000 lb. (907 kg), a sway control
device with sufficient capacity is required.
● If the gross trailer weight is over 5000 lb. (2268 kg), a weight distrib-
uting hitch with sufficient capacity is required.
Weight limits

1624-1. Before driving
Confirm that the gross trailer weight, gross combination weight, gross
vehicle weight, gross axle weight and tongue weight are all within the
limits.
■GCWR*5 and TWR*5
Regular Cab models
*1: The model code is indicated on the Certification Label. (P. 510)
*2: Vehicles without towing package
*3: Vehicles with towing package
*4: Vehicles with towing package and large fuel tank
GCWR, TWR, Unbraked TWR, Fifth wheel and Gooseneck towing
TWR
*5: These models meet the tow-vehicle trailering requirement of SAE International per SAE J2807.
Model code*1EngineDriving
systemBed typeGCWRTWR
USK51L-THTSKA 3UR-FE engine 2WD
Long14000 lb.
(6350 kg)
*28500 lb.
(3855 kg)
*2
16000 lb.
(7255 kg)
*310500 lb.
(4760 kg)
*3
16000 lb.
(7255 kg)
*410400 lb.
(4715 kg)
*4
USK56L-THTSKA
4WD14000 lb.
(6350 kg)
*28300 lb.
(3760 kg)
*2
16000 lb.
(7255 kg)
*310300 lb.
(4670 kg)
*3
16000 lb.
(7255 kg)
*410100 lb.
(4580 kg)
*4
USK56L-THTSGA 3UR-FBE
engine 14000 lb.
(6350 kg)
*28300 lb.
(3760 kg)
*2
16000 lb.
(7255 kg)
*310300 lb.
(4670 kg)
*3
16000 lb.
(7255 kg)
*410100 lb.
(4580 kg)
*4

1664-1. Before driving
*1: The model code is indicated on the Certification Label. (P. 510)
*2: Vehicles without towing package
*3: Vehicles with towing package
*4: Vehicles with towing package and large fuel tank
■
Unbraked TWR*5
1000 lb. (453 kg)
USK56L-PSTZKA 3UR-FE
engine 4WD Short 14000 lb.
(6350 kg)
*27800 lb.
(3535 kg)
*2
16000 lb.
(7255 kg)
*39800 lb.
(4445 kg)
*3
15200 lb.
(6890 kg)
*48800 lb.
(3990 kg)
*4
USK56L-PSTSGA
3UR-FBE engine 4WD Short 14000 lb.
(6350 kg)
*27800 lb.
(3535 kg)
*2
16000 lb.
(7255 kg)
*39800 lb.
(4445 kg)
*3
15900 lb.
(7210 kg)
*49600 lb.
(4350 kg)
*4
USK56L-PSTLGA 14000 lb.
(6350 kg)
*27800 lb.
(3535 kg)
*2
16000 lb.
(7255 kg)
*39800 lb.
(4445 kg)
*3
15200 lb.
(6890 kg)
*48800 lb.
(3990 kg)
*4
USK56L-PSTZGA 14000 lb.
(6350 kg)
*27800 lb.
(3535 kg)
*2
16000 lb.
(7255 kg)
*39800 lb.
(4445 kg)
*3
15200 lb.
(6890 kg)
*48800 lb.
(3990 kg)
*4
*5: These models meet the tow-vehicle trailering requirement of SAE
International per SAE J2807.
Model code*1EngineDriving
systemBed typeGCWRTWR

1704-1. Before driving
Hitch receiver pin hole position:
46.4 in. (1179 mm)
Use the wire harness stored in the rear end of the vehicle.
■ Service connector for towing brake controller (if equipped)
Positions for towing hitch receiver
1
Connecting trailer lights
Vehicles without towing pack-
ageVehicles with towing package
Your vehicle is equipped with a service
connector for the trailer brake controller
as shown.
Access the service connector.
Remove the scuff plate.
Remove the clip (screw type) and trim
board.
Remove the connector cover.
1
2
3

1724-1. Before driving
●Avoid sudden braking as you may skid, resulting in the trailer jack-
knifing and a loss of vehicle contro l. This is especially true on wet or
slippery surfaces.
● Avoid jerky starts or sudden acceleration.
● Avoid jerky steering and sharp turns, and slow down before making
a turn.
● Note that when making a turn, the trailer wheels will be closer than
the vehicle wheels to the inside of the turn. Compensate by making
a wider than normal turning radius.
● Slow down before making a turn, in crosswinds, on wet or slippery
surfaces, etc.
Increasing vehicle speed can destabilize the trailer.
● Take care when passing other vehicles. Passing requires consider-
able distance. After passing a vehicle, do not forget the length of
your trailer, and be sure you hav e plenty of room before changing
lanes.
● To maintain engine braking effici ency and charging system perfor-
mance when using engine braking, do not use the transmission in
D.
Transmission shift range position must be in 4 in the S mode.
● Instability happens more frequently when descending steep or long
downhill grades. Before descending, slow down and downshift. Do
not make sudden downshifts while descending steep or long down-
hill grades.
● Avoid holding the brake pedal down too long or applying the brakes
too frequently. This could cause th e brakes to overheat and result in
reduced braking efficiency.
● Due to the added load of the trailer, your vehicle’s engine may over-
heat on hot days (at temperatures over 85°F [30°C]) when driving
up a long or steep grade. If t he engine coolant temperature gauge
indicates overheating, immediately turn off the air conditioning (if in
use), pull your vehicle off the road and stop in a safe spot.
(  P. 497)

1734-1. Before driving
4
Driving
●Always place wheel blocks under both the vehicle’s and the trailer’s
wheels when parking. Apply the pa rking brake firmly, and put the
transmission in P. Avoid parking on a slope, but if unavoidable, do
so only after performing 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 after parking on a slope:
With the transmission in P, start the engine. Be sure to keep the
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 blocks. Stop and apply the brakes.
Have someone retrieve the blocks.
■Trailer brake controller
P. 237
■ Matching trailer ball height to trailer coupler height
No matter which class of tow hitch
applies, for a more safe trailer hookup,
the trailer ball setup must be the proper
height for the coupler on the trailer.
Coupler
Trailer ball
1
2
3
4
5
1
2
3
4
1
2