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5
When trouble arises
473
5-2. Steps to take in an emergency
PRIUS v_OM_OM47820U_(U)
Pass the belt through the buckle
and secure the tire firmly. Check
that the belt is securely held by
the buckle.
The belt cannot be fastened
securely if the buckle is facing
the wrong direction.
STEP 4
■The compact spare tire
●The compact spare tire is identifi
ed by the label “TEMPORARY USE
ONLY” on the tire sidewall.
Use the compact spare tire temporarily, and only in an emergency.
●Make sure to check the tire inflation pressure of the compact spare
tire. ( P. 506)
■After completing the tire change
The tire pressure warning system must be reset. (P. 393)
■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 replace 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 ice
Install the compact spare tire on one of the rear wheels of the vehicle.
Perform the following steps and fit 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 vehicle.
Fit tire chains to the front tires.
STEP 1
STEP 2
STEP 3
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5
When trouble arises
477
5-2. Steps to take in an emergency
PRIUS v_OM_OM47820U_(U)
NOTICE
■Do not drive the vehicle with a flat tire
Do not continue driving with a flat tire.
Driving even a short distance with a flat tire can damage the tire and the
wheel beyond repair.
■Be careful when driving over bumps with the compact spare tire
installed on the vehicle
The vehicle becomes lower when driving with the compact spare tire
compared to when drivin
g with standard tires. Be careful when driving
over uneven road surfaces.
■Driving with tire chains and the compact spare tire
Do not fit tire chains to the compact spare tire.
Tire chains may damage the vehicle body and adversely affect driving
performance.
■When replacing the tires
When removing or fitting the wheels, tires or the tire pressure warning
valve and transmitter, contact your Toyota dealer as the tire pressure
warning valve and transmitter may be damaged if not handled correctly.
■To avoid damage to the tire pressure warning valves and transmit-
ters
When a tire is repaired with liquid sealants, the tire pressure warning
valve and transmitter may not operate properly. If a liquid sealant is
used, contact your Toyota dealer or other qualified service shop as soon
as possible. Make sure to replace the tire pressure warning valve and
transmitter when replacing the tire. ( P. 392)
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5
When trouble arises
489
5-2. Steps to take in an emergency
PRIUS v_OM_OM47820U_(U)
If your vehicle overheats
Correction procedures■ If the high coolant temperatur e warning light comes on or
flashes
Stop the vehicle in a safe place and turn off the air condition-
ing system, and then stop the hybrid system.
If you see steam: Carefully lift the hood after the steam subsides.
If you do not see steam: Carefully lift the hood.
After the hybrid system has
cooled down sufficiently, inspect
the hoses and radiator core
(radiator) for any leaks.
Radiator
Cooling fans
If a large amount of coolant leaks,
immediately contact your Toyota
dealer.
The following may indicate that your vehicle is overheating.
●The high coolant temperature warning light ( P. 447) comes on
or flashes, or a loss of hybrid system power is experienced. (For
example, the vehicle s peed does not increase.)
● The hybrid system overheat warning light ( P. 451) comes on.
● Steam comes out from under the hood.
STEP 1
STEP 2
STEP 3
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When trouble arises
491
5-2. Steps to take in an emergency
PRIUS v_OM_OM47820U_(U)
■
If the hybrid system overheat warning light comes on
Stop the vehicle in a safe place.
Stop the hybrid system and carefully lift the hood.
After the hybrid system has
cooled down, inspect the hoses
and radiator core (radiator) for
any leaks.
Radiator
Cooling fans
If a large amount of coolant leaks,
immediately contact your Toyota
dealer.
The coolant level is satisfactory if
it is between the “F” and “L” lines
on the reservoir.Reservoir
“F”
“L”
Add coolant if necessary.
Water can be used in an emer-
gency if coolant is unavailable.
Start the hybrid system and check for the instrument cluster.
If the hybrid system overheat warning light does not turn off: Stop the hybrid system and c ontact your Toyota dealer.
If the hybrid system overheat warning light does not come on:
Have the vehicle inspected at the nearest Toyota dealer.
STEP 1
STEP 2
STEP 3
STEP 4
STEP 5
STEP 6
Page 518 of 568

518 6-1. Specifications
PRIUS v_OM_OM47820U_(U)
■Traction AA, A, B, C
The traction grades, from highest to lowest, are AA, A, B and C,
and they represent the tire’s ab ility to stop on wet pavement as
measured under controlled cond itions on specified government
test surfaces of asphalt and concrete.
A tire marked C may have poor traction performance.
Warning: The traction grade assigned to this tire is based on braking
(straight ahead) traction tests and does not include cornering (turn-
ing) traction.
■ Temperature A, B, C
The temperature grades are A (the highest), B, and C, represent-
ing the tire’s resistance to the generation of heat and its ability to
dissipate heat when tested under controlled conditions on a speci-
fied indoor laboratory test wheel.
Sustained high temperature can cause the material of the tire to
degenerate and reduce tire life, and excessive temperature can lead
to sudden tire failure.
Grade C corresponds to a level of performance which all passenger
car tires must meet under the Federal Motor Vehicle Safety Standard
No. 109.
Grades B and A represent higher levels of performance on the labo-
ratory test wheel than the minimum required by law.
Warning: The temperature grades of a tire assume that it is properly
inflated and not overloaded.
Excessive speed, underinflation, or excessive loading, either sepa-
rately or in combination, can cause heat buildup and possible tire fail-
ure.
Page 532 of 568
532 6-2. Customization
PRIUS v_OM_OM47820U_(U)
ItemFunctionDefault set-tingCustom-ized
setting
Panoramic
roof shades
door lock-
linked auto-
matic closing
function
( P. 323) Operates when
the “POWER”
switch is turned
off and the doors
are locked from
inside or outside
the vehicle using
the wireless
remote control,
or are locked
from outside the
vehicle using the
smart key sys-
tem or mechani-
cal key
ON OFF – – O
Reverse
warning
buzzer
( P. 190) Operation sig-
nals (buzzer)
when shifting
into R
Beeps
repeatedly Beeps
once ––O
Seat belt
reminder
( P. 454) Vehicle speed
linked seat belt
reminder buzzer
ON OFF – – O
Page 533 of 568
533
6
Vehicle specifications
PRIUS v_OM_OM47820U_(U)
6-3. Initialization
Items to initialize
ItemWhen to initializeReference
Maintenance data After the maintenance is performed P. 358
Tire pressure warning
system • When rotating the tires on vehicles
with differing front and rear tire infla-
tion pressures
• When changing the tire size P. 393
The following items must be init
ialized for normal system operation
after such cases as the 12-volt batt ery being reconnected, or mainte-
nance being performed on the vehicle.
Page 553 of 568
553
Abbreviation list
PRIUS v_OM_OM47820U_(U)
ABBREVIATIONSMEANING
OBDOn Board Diagnostics
PCSPre-Collision System
PWRPower
SRSSupplemental Restraint System
TINTire Identification Number
TPMSTire Pressure Monitoring (Warning) System
TRACTraction Control
TWITreadwear Indicator
VINVehicle Identification Number
VSCVehicle Stability Control