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PRIUS PRIME_OM_OM47A88U_(U)
3835-5. Using the driving support systems
5
Driving
WARNING
■Before using LDA system
Do not rely solely upon the LDA system. The LDA system does not auto-
matically drive the vehicle or reduce the amount of attention that must be
paid to the area in front of the vehicle. The driver must always assume full
responsibility for driving safely by paying careful attention to the surround-
ing conditions and operating the steering wheel to correct the path of the
vehicle. Also, the driver must take adequate breaks when fatigued, such as
from driving for a long period of time.
Failure to perform appropriate driving operations and pay careful attention
may lead to an accident, resulting in death or serious injury.
■ To avoid operating LDA system by mistake
When not using the LDA system, use the LDA switch to turn the system off.
■ Situations unsuitable for LDA system
Do not use the LDA system in the following situations.
The system may not operate properly and lead to an accident, resulting in
death or serious injury.
● Tire chains are equipped.
● When the tires have been excessively worn, or when the tire inflation pres-
sure is low.
● Tires which differ by structure, manufacturer, brand or tread pattern are
used.
● Objects or patterns that could be mistaken for white (yellow) lines are
present on the side of the road (guardrails, curbs, reflective poles etc.).
● Vehicle is driven on a snow-covered road.
● White (yellow) lines are difficult to see due to rain, snow, fog, dust, etc.
● Asphalt repair marks, white (yellow) line marks, etc., are present due to
road repair.
● Vehicle is driven in a temporary lane or restricted lane due to construction
work.
● Vehicle is driven on a road surface which is slippery due to rainy weather,
fallen snow, freezing, etc.
● Vehicle is driven in traffic lanes other than on highways and freeways.
● Vehicle is driven in a construction zone.
Page 481 of 784
PRIUS PRIME_OM_OM47A88U_(U)
4815-5. Using the driving support systems
5
Driving
WARNING
■When the TRAC/VSC syst ems are turned off
Be especially careful and drive at a speed appropriate to the road condi-
tions. As these are the systems to help ensure vehicle stability and driving
force, do not turn the TRAC/VSC systems off unless necessary.
■ Replacing tires
Make sure that all tires are of the specified size, brand, tread pattern and
total load capacity. In addition, make sure that the tires are inflated to the
recommended tire inflation pressure level.
The ABS, TRAC and VSC systems will not function correctly if different tires
are installed on the vehicle.
Contact your Toyota dealer for further information when replacing tires or
wheels.
■ Handling of tires and the suspension
Using tires with any kind of problem or modifying the suspension will affect
the driving assist systems, and may cause a system to malfunction.
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PRIUS PRIME_OM_OM47A88U_(U)
6-4. Using the other interior features
■Enhanced Roadside Assistance
Enhanced Roadside Assi stance adds GPS data to the already
included warranty-based Toyota roadside service.
Subscribers can press the “SOS” bu tton to reach a Safety Connect
response-center agent, who can help with a wide range of needs,
such as: towing, flat tire, fuel deli very, etc. For a description of the
Roadside Assistance se rvices and their limitations, please see the
Safety Connect Terms and Conditions, which are available at
Toyota.com.
Important! Read this informatio n before using Safety Connect.
■Exposure to radio frequency signals
The Safety Connect system install ed in your vehicle is a low-power
radio transmitter and receiver. It receives and also sends out radio
frequency (RF) signals.
In August 1996, the Federal Communications Commission (FCC)
adopted RF exposure gui delines with safety levels for mobile wire-
less phones. Those guidelines are c onsistent with the safety stan-
dards previously set by the fo llowing U.S. and international
standards bodies.
● ANSI (American National Stand ards Institute) C95.1 [1992]
● NCRP (National Council on Radi ation Protection and Measure-
ment) Report 86 [1986]
● ICNIRP (International Commiss ion on Non-Ionizing Radiation
Protection) [1996]
Those standards were based on comprehensive and periodic eval-
uations of the relevant scientific literature. Over 120 scientists, engi-
neers, and physicians from uni versities, and government health
agencies and industries reviewed t he available body of research to
develop the ANSI Standard (C95.1).
The design of Safety Connect complies with the FCC guidelines in
addition to those standards.
Safety information for Safety Connect
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555
PRIUS PRIME_OM_OM47A88U_(U)
7Maintenance and care
7-1. Maintenance and careCleaning and protecting the vehicle exterior .......... 556
Cleaning and protecting the vehicle interior ........... 561
7-2. Maintenance Maintenance requirements ................... 567
General maintenance........ 570
Emission inspection and maintenance (I/M)
programs......................... 573
7-3. Do-it-yourself maintenance Do-it-yourself service precautions ..................... 574
Hood ................................. 577
Positioning a floor jack ...... 579
Engine compartment ......... 580
Tires .................................. 594
Tire inflation pressure ....... 603
Wheels .............................. 606
Replacing the tire .............. 609
Air conditioning filter.......... 620
Wiper rubber replacement .................... 624
Electronic key battery........ 627
Checking and replacing fuses ............................... 630
Headlight aim .................... 633
Light bulbs......................... 635
Page 572 of 784
572
PRIUS PRIME_OM_OM47A88U_(U)
7-2. Maintenance
Vehicle exterior
ItemsCheck points
Doors• Do the doors operate smoothly?
Engine hood• Does the engine hood lock system work prop-erly?
Fluid leaks• There should not be any signs of fluid leakageafter the vehicle has been parked.
Tires
• Is the tire inflation pressure correct?
• The tires should not be damaged or exces-sively worn.
• Have the tires been rotated according to the
maintenance schedule?
• The wheel nuts should not be loose.
Windshield wipers
• The wiper blades should not show any signs
of cracking, splitting, wear, contamination or
deformation.
• The wiper blades should clear the windshield
without streaking or skipping.
Charging equipment
ItemsCheck points
Charging cable• Check the conditions of the charging cableand charging connector. ( →P. 112)
WARNING
■If the hybrid system is operating
Turn the hybrid system off and ensure that there is adequate ventilation
before performing maintenance checks.
Page 575 of 784

PRIUS PRIME_OM_OM47A88U_(U)
5757-3. Do-it-yourself maintenance
7
Maintenance and care
Tire inflation
pressure
(→ P. 603)• Tire pressure gauge
• Compressed air source
Washer fluid
(→ P. 592)• Water or washer fluid containing antifreeze (for win-
ter use)
• Funnel (used only for adding water or washer fluid)
WARNING
The engine compartment contains many mechanisms and fluids that may
move suddenly, become hot, or become electrically energized. To avoid death
or serious injury, observe the following precautions.
■When working on the engine compartment
● Make sure that the “Accessory”, “Ignition ON” or mileage display
(→P. 197) on the main display and the “READY” indicator are both off.
● Keep hands, clothing and tools away from the moving fan.
● Be careful not to touch the engine, power control unit, radiator, exhaust
manifold, etc. right after driving as they may be hot. Oil and other fluids
may also be hot.
● Do not leave anything that may burn easily, such as paper and rags, in the
engine compartment.
● Do not smoke, cause sparks or expose an open flame to fuel. Fuel fumes
are flammable.
● Be extremely cautious when working on the 12- volt battery. It contains
poisonous and corrosive sulfuric acid.
■ When working near the electric cooling fans or radiator grille
Be sure the power switch is off.
With the power switch in ON mode, t he electric cooling fans may automati-
cally start to run if the air condition ing is on and/or the coolant temperature
is high. ( →P. 586)
■ Safety glasses
Wear safety glasses to prevent flying or falling material, fluid spray, etc.
from getting in your eyes.
ItemsParts and tools
Page 595 of 784

PRIUS PRIME_OM_OM47A88U_(U)
5957-3. Do-it-yourself maintenance
7
Maintenance and care
Your vehicle is equipped with a tire pressure warning system that uses
tire pressure warning valves and tr ansmitters to detect low tire infla-
tion pressure before serious problems arise.
If the tire pressure drops below a predetermined level, the driver is
warned by a warning light. ( →P. 656)
◆Installing tire pressure warning valves and transmitters
When replacing tires or wheels, tire pressure warning valves and
transmitters must also be installed.
When new tire pressure warning valves and transmitters are
installed, new ID codes must be registered in the tire pressure
warning computer and the tire pr essure warning system must be
initialized. Have tire pressure warning valve and transmitter ID
codes registered by your Toyota dealer. ( →P. 596)
◆Initializing the tire pressure warning system
■The tire pressure warning system must be initialized in the fol-
lowing circumstances:
● When rotating front and rear tires which have different tire infla-
tion pressures
● When the tire inflation pressure is changed such as when chang-
ing traveling speed or load weight
When the tire pressure warning system is initialized, the current tire
inflation pressure is set as the benchmark pressure.
Tire pressure warning system
Page 596 of 784

596
PRIUS PRIME_OM_OM47A88U_(U)
7-3. Do-it-yourself maintenance
■How to initialize the tire pressure warning systemPark the vehicle in a safe place and turn the power switch off.
Initialization cannot be performed while the vehicle is moving.
Adjust the tire inflation pressure to the specified cold tire inflation
pressure level. ( →P. 716)
Make sure to adjust the tire pressu re to the specified cold tire infla-
tion pressure level. The tire pressure warning system will operate
based on this pressure level.
Turn the power switch to ON mode.
Switch the multi-informatio n display to the screen.
( → P. 231)
Press or of the meter control switches, select “
(Vehicle Settings)”, and then press .
Press or of the meter cont rol switches, select “Mainte-
nance System”, and then press .
Press or of the meter control switches, select “TPMS”,
and then press .
Press and hold .
When initialization com-
pletes, a message is dis-
played on the multi-
information display and the
tire pressure warning light
illuminates.
◆Registering ID codes
The tire pressure warning valve and transmitter is equipped with a
unique ID code. When replacing a tire pressure warning valve and
transmitter, it is necessary to register the ID code. Have the ID code
registered by your Toyota dealer.
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