2020 TOYOTA TUNDRA light

4296-3. Do-it-yourself maintenance
6
Maintenance and care
◆Registering ID codes
Every tire pressure warning valve and transmitter has a unique ID
code. When replacing a tire pressure warning valve and transmit ter,
it is necessary to register the ID codes.
To register the ID codes, perf orm the following procedure:
Press the tire pressure warn-
ing reset switch 3 times until
the tire pressure warning
light blinks slowly 3 times.
Then a message will be dis-
played on multi-information
display. When registration is
being performed, the tire pres-
sure warning light will blink for
approximately 1 minute then
illuminate and “--” will be dis-
played for the inflation pres-
sure of each tire on the multi-
information display.
Drive straight (with occasional left and right turns) at approxi-
mately 25 mph (40 km/h) or more for approximately 10 to 30 min-
utes.
Registration is complete when the tire pressure warning light
turns off and the inflation pressure of each tire is displayed on the
multi-information display.
Registration may take longer t han approximately 30 minutes in
certain situations, such as when the vehicle is stopped for a long
time at traffic lights, etc. (→P. 434)
After registering the ID codes, make sure to initialize the tir e
pressure warning system. (→P. 427)
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4306-3. Do-it-yourself maintenance
■When to replace your vehicle’s tires
Tires should be replaced if:
●The treadwear indicators are showing on a tire.
●You have tire damage such as cuts, splits, cracks deep enough t o
expose the fabric, and bulges indicating internal damage
●A tire goes flat repeatedly or c annot be properly repaired due to the size
or location of a cut or other damage
If you are not sure, consult with your Toyota dealer.
■When replacing the tires and wheels
If the ID code of the tire press ure warning valve and transmitt er is not reg-
istered, the tire pressure warni ng system will not work properly. A f t e r d r i v -
ing for about 20 minutes, the tire pressure warning light blink s for
1 minute and stays on to indica te a system malfunction.
■Tire life
Any tire over 6 years old must be checked by a qualified techni cian even
if it has seldom or never been u sed or damage is not obvious.
■Routine tire inflation pressure checks
The tire pressure warning system does not replace routine tire inflation
pressure checks. Make sure to chec k tire inflation pressure as part of
your routine of daily vehicle checks.
■Maximum load of tire
Check that the number given by dividing the maximum load by 1.1 0 of the
replacement tire is greater than 1/2 of the Gross Axle Weight R atings
(GAWR) of either the front axle or the rear axle, whichever is greater.
For the GAWR, see the Certification
Label. For the maximum load of the tire,
see the load limit at maximum cold tire
inflation pressure mentioned on the
sidewall of the tire. ( P. 5 5 2 )

4346-3. Do-it-yourself maintenance
■When initialization of the tire pressure warning system has fai led
Initialization may take longer to complete if the vehicle is driven on an
unpaved road. When performing ini tialization, drive on a paved road if
possible. Depending on the driving environment and condition of the tires,
initialization will be completed i n approximately 10 to 30 minutes. If initial-
ization is not complete after dr iving approximately 10 to 30 mi nutes, con-
tinue driving for a while.
If the inflation pressure of each tire is not displayed after d riving for
approximately 1 hour, perf orm the following procedure.
●Park the vehicle in a safe place for approximately 20 minutes. Then
drive straight (with occasional left and right turns) at approx imately
25 mph (40 km/h) or more for approximately 10 to 30 minutes.
However, in the following situatio ns, the tire inflation pressure will not be
recorded and the system will not operate properly. Perform initialization
again.
●When operating the tire pressure warning reset switch, the tire pressure
warning light does not blink 3 times.
●After performing initialization, t he tire pressure warning light blinks for
1 minute then stays on while driving about 20 minutes.
If the inflation pressure of eac h tire is still not displayed, have the vehicle
inspected by you r Toyota dealer.

4386-3. Do-it-yourself maintenance
WARNING
■When inspecting or replacing tires
Observe the following precautions to prevent accidents.
Failure to do so may cause damage to parts of the drive train as well as
dangerous handling characteristics, which may lead to an accide nt
resulting in death o r serious injury.
●Do not mix tires of different ma kes, models or tread patterns.
Also, do not mix tires of re markably different treadwear.
●Do not use tire sizes other th an those recommended by Toyota.
●Do not mix differently constructed tires (radial, bias-belted o r bias-ply
tires).
●Do not mix summer, all season and snow tires.
●Do not use tires that have b een used on another vehicle.
Do not use tires if you do not kn ow how they were used previous ly.
■When initializing the tire pressure warning system
Do not operate the tire pressure warning reset switch without first
adjusting the tire inflation pressure to the specified level. O therwise, the
tire pressure warning light may not come on even if the tire in flation
pressure is low, or it may come on when the tire inflation pres sure is
actually normal.

4536-3. Do-it-yourself maintenance
6
Maintenance and care
Check if the fuse is blown.Normal fuse
Blown fuse
Type A and B:
Replace the blown fuse with a new fuse of an appropriate ampera ge rat-
ing. The amperage rating can be found on the fuse box cover.
Type C:
Contact your Toyota dealer.
■ After a fuse is replaced
●If the lights do not turn on even after the fuse has been repla ced, a bulb may
need replacement. ( P. 455)
● If the replaced fuse blows again, have the vehicle inspected by your Toyota
dealer.
■ If there is an overload in a circuit
The fuses are designed to blow, protecting the wiring harness f rom damage.
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Ty p e AType B
Ty p e C

4556-3. Do-it-yourself maintenance
6
Maintenance and care
Light bulbs
Check the wattage of the light bulb to be replaced. ( P. 548)
■Front
You may replace the following bul bs by yourself. The difficulty
level of replacement varies depending on the bulb. If neces-
sary bulb replacement seems difficult to perform, contact your
To y o t a d e a l e r.
For more information about replacing other light bulbs, contact
your Toyota dealer.
Preparing for light bulb replacement
Bulb locations
Headlights (bulb type)
Front turn signal lights/parking lights (bulb type)
Front side marker lights
Fog lights (bulb type) (if equipped)1
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4566-3. Do-it-yourself maintenance
■Rear
Stop/tail and rear side marker lights
Back up lights
Rear turn signal lights
License plate lights
High mounted stoplight and cargo lamps1
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4576-3. Do-it-yourself maintenance
6
Maintenance and care
■Headlights (bulb type)To allow enough working
space, turn the steering
wheel to the opposite side of
the bulb to be replaced.
Remove the screws and
fender liner clip, and remove
the fender liner.
Turn the steering wheel to the
left when replacing the right side
light bulb, and turn the steering
wheel to the right when replac-
ing the left side light bulb.
Open the fender liner and
unplug the connector.
Replacing light bulbs
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