2020 TOYOTA PRIUS C tire pressure reset

20Pictorial index
PRIUS c_U
■Switches
Automatic High Beam switch . . . . . . . . . . . . . . . . . . . . . . . . P. 246
Outside rear view mirror switches . . . . . . . . . . . . . . . . . . . . P. 161
Instrument panel light control dial . . . . . . . . . . . . . . . . . . . . P. 101
PCS (Pre-Collision system) switch . . . . . . . . . . . . . . . . . . . P. 231
LDA (Lane Departure Alert) switch. . . . . . . . . . . . . . . . . . . . P. 241
Window lock switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 163
Door lock switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 130
Power window switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 163
USB port/AUX port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 284
Tire pressure warning reset switch . . . . . . . . . . . . . . . . . . . P. 4361
2
3
4
5
6
7
8
9
10

4377-3. Do-it-yourself maintenance
7
Maintenance and care
PRIUS c_U
Turn the power switch to the “ON” position (vehicles without a
smart key system) or power switch to ON mode (vehicles with a
smart key system).
Press and hold the tire pres-
sure warning reset switch
until the tire pressure warn-
ing light blinks slowly 3 times.
Vehicles without a smart key syst em: Wait for a few minutes with
the power switch in the “ON” position and then turn the power
switch to the “ACC” or “LOCK” position.
Vehicles with a smart key system : Wait for a few minutes with the
power switch in ON mode and then turn the power switch off.
◆Registering ID codes
The tire pressure warning valve and transmitter is equipped wit h a
unique ID code. When replacing a tire pressure warning valve an d
transmitter, it is necessary to register the ID code. Have the ID code
registered by your Toyota dealer.
3
4
5

4407-3. Do-it-yourself maintenance
PRIUS c_U■
If the tire pressure warning system is not functioning
The tire pressure warning syst
em will be disabled in the follow ing condi-
tions:
(When the condition becomes normal, the system will work properly.)
●If tires not equipped with tire pressure warning valves and tra nsmitters
are used
●If the ID code on the tire pressure warning valves and transmit ters is not
registered in the tire pr essure warning computer
●If the tire inflation pressure is 70 psi (480 kPa, 4.9 kgf/cm2 or bar) or
higher
The tire pressure warning system may be disabled in the followi ng condi-
tions:
(When the condition becomes normal, the system will work properly.)
●If electronic devices or facilitie s using similar radio wave frequencies are
nearby
●If a radio set at a similar frequency is in use in the vehicle
●If a window tint that affects the radio wave signals is installed
●If there is a lot of snow or ice on the vehicle, particularly around the
wheels or wheel housings
●If non-genuine Toyota wheels are used (Even if you use Toyota wheels,
the tire pressure warning system may not work properly with som e types
of tires.)
●If tire chains are used
■The initialization operation
●Make sure to carry out initializ ation after adjusting the tire inflation pres-
sure.
Also, make sure the tires are co ld before carrying out initialization or tire
inflation pressure adjustment.
●If you have accidentally turned the power switch to off during initializa-
tion, it is not necessary to press the reset switch again as in itialization
will restart automatically when the power switch has been turned to the
ON mode for th e next time.
●If you accidentally press the reset switch when initialization is not neces-
sary, adjust the tire inflation pressure to the specified level when the
tires are cold, and cond uct initialization again.

4417-3. Do-it-yourself maintenance
7
Maintenance and care
PRIUS c_U■
When the initializati
on of the tire pressure warning system has failed
Initialization can be completed i n a few minutes. However, in the following
cases, the settings have not been record ed and the system will not oper-
ate properly. If repeated attempts to record tire inflation pre ssure settings
are unsuccessful, have the vehicl e inspected by your Toyota dealer.
●When operating the tire pressure warning reset switch, the tire pressure
warning light does not blink 3 times.
●After driving for a certain period of time since the initializa tion has been
completed, the warning light comes on after blinking for 1 minute.
■Tire pressure warning system certification
For vehicles sold in the U.S.A. and Puerto Rico
For vehicles sold in Canada

4427-3. Do-it-yourself maintenance
PRIUS c_U
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.
●Do not tow if your vehicle has a compact spare tire installed.
■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.

4848-2. Steps to take in an emergency
PRIUS c_U
■SRS warning light
This warning light system monitors the airbag sensor assembly, front impact
sensors, side impact sensors (front door), side impact sensors (front), side
impact sensors (rear), driver’s seat belt buckle switch, front passenger occu-
pant classification system, “AIR BAG ON” indicator light, “AIR BAG OFF” indi-
cator light, front passenger’s seat belt buckle switch, seat be lt pretensioners
(front), airbags, interconnecting wiring and power sources. ( P. 41)
■ Front passenger detection senso r, passenger seat belt reminder and
warning 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.
■ Electric power steering system wa rning light (warning buzzer)
When the 12-volt battery charge becomes insufficient or the vol tage tempo-
rarily drops, the electric power steering system warning light may come on
and the warning buzzer may sound.
■ 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.
■
When the tire pressure warning light comes on
Check the tire inflation pressure and adjust to the appropriate level. Push-
ing the tire pressur e warning reset switch will not turn off the tire pressure
warning light.
■The tire pressure warning light may come on due to natural caus es
The tire pressure warning light may come on due to natural caus es such
as natural air leaks and tire inflation pressure changes caused by tem-
perature. In this case, adjusting the tire inflation pressure w ill turn off the
warning light (afte r a few minutes).
■When a tire is replace d with a spare tire
The compact spare tire is not equipped with a tire pressure war ning valve
and transmitter. If a tire goes flat, the tire pressure warning light will not
turn off even though the flat tire has been replaced with the s pare tire.
Replace the spare tire with the repaired tire and adjust the ti re inflation
pressure. The tire pressure war ning light will go off after a few minutes.

5158-2. Steps to take in an emergency
8
When trouble arises
PRIUS c_U
■The compact spare tire
●The compact spare tire is identified by the label “TEMPORARY USE
ONLY” on the tire sidewall.
Use the compact spar e tire temporarily, and only in an emergenc y.
●Make sure to check the tire inflation pressure of the compact s pare tire.
(  P. 5 4 3 )
■After completing the tire change
The tire pressure warni ng system must be reset. ( P. 436)
■When using the compact spare tire
As the compact spare tire is not equipped with a tire pressure warning
valve and transmitter, low inflation pressure of the spare tire will not be
indicated by the tire pressure warning system. Also, if you rep lace the
compact spare tire after the tire pressure warning light comes on, the light
remains on.
■If you have a flat front tire on a road covered with snow or ic e
Install the compact spare tire on one of the rear wheels of the vehicle.
Perform the following steps and f it tire chains to the front tires:
Replace a rear tire with the compact spare tire.
Replace the flat front tire with the tire removed from the rear of the vehi-
cle.
Fit tire chains to the front tires.
1
2
3