Page 440 of 784

440
PRIUS PRIME_OM_OM47A88U_(U)
5-5. Using the driving support systems
WARNING
■For safe use
Do not rely solely upon the system. Relying solely upon the system may
lead to an unexpected accident.
● Driving safely is the sole responsibility of the driver. Pay careful attention
to the surrounding conditions in order to ensure safe driving. The Intelli-
gent Clearance Sonar function can provide support to lessen the severity
of collisions. However, it may not operate depending on the situation.
● The Intelligent Clearance Sonar function is not a system designed to com-
pletely stop the vehicle. Furthermore, even if the Intelligent Clearance
Sonar function is able to stop the vehicle, brake control is canceled after
approximately 2 seconds, so depress the brake pedal immediately.
■ In order for the system to operate properly
Make sure to observe the following precautions regarding the sensors
(→ P. 431). Failure to observe these precautions may cause the sensors
not to operate properly, and may result in an unexpected accident.
● Do not perform work such as modification, disassembly or painting
● Only perform replacements using genuine parts
● Do not subject the area around the sensors to any impacts
● Do not damage the sensors, and always keep them clean
■ Handling the suspension
Do not modify the suspension, as changes to the height or incline of the
vehicle may prevent the sensors from correctly detecting obstacles, may
cause the system not operate, or may cause the system to operate unnec-
essarily.
Page 484 of 784

484
PRIUS PRIME_OM_OM47A88U_(U)
5-6. Driving tips
■Tire chain installation
Observe the following precautions when installing and removing chains:
●Install and remove tire chains in a safe location.
● Install tire chains on the front tires only. Do not install tire chains on the rear
tires.
● Install tire chains on front tires as tightly as possible. Retighten chains after
driving 1/4 - 1/2 mile (0.5 - 1.0 km).
● Install tire chains following the instructions provided with the tire ch\
ains.
■ Consumption of fuel and electricity
In cold temperatures, resistance of the parts of a vehicle (transmission, tires,
etc.) generally increases, resulting in increase of energy consumption. As a
result, fuel economy is likely to decrease.
Consumption of fuel and electricity of this vehicle is also likely to become
worse in cold temperatures.
WARNING
■Driving with snow tires
Observe the following precautions to reduce the risk of accidents.
Failure to do so may result in a loss of vehicle control and cause death or
serious injury.
● Use tires of the specified size.
● Maintain the recommended level of air pressure.
● Do not drive in excess of 75 mph (120 km/h), regardless of the type of
snow tires being used.
● Use snow tires on all, not just some wheels.
■ Driving with tire chains
Observe the following precautions to reduce the risk of accidents.
Failure to do so may result in the vehicle being unable to be driven safely,
and may cause death or serious injury.
● Do not drive in excess of the speed limit specified for the tire chains being
used, or 30 mph (50 km/h), whichever is lower.
● Avoid driving on bumpy road surfaces or over potholes.
● Avoid sudden acceleration, abrupt steering, sudden braking and shifting
operations that cause sudden engine braking.
● Slow down sufficiently before entering a curve to ensure that vehicle con-
trol is maintained.
■ When parking the vehicle
When parking the vehicle without applying the parking brake, make sure to
chock the wheels. If you do not chock the wheels, the vehicle may move
unexpectedly, possibly resulting in an accident.
Page 532 of 784
532
PRIUS PRIME_OM_OM47A88U_(U)
6-4. Using the other interior features
A portable device can be charged by just placing Qi standard wireless
charge compatible portable devices according to the Wireless Power
Consortium, such as smart phones an d mobile batteries, etc., on the
charge area.
This function cannot be used wi th portable devices that are larger
than the charging area. Also, depend ing on the portable device, it may
not operate as normal. Please read the operation manual for portable
devices to be used.
■The “Qi” symbol
The “Qi” symbol is a trademark of the Wireless Power Consortium.
■Name for all parts
Power supply switch
Operation indicator light
Charge area
Wireless charger (if equipped)
1
2
3
Page 560 of 784

560
PRIUS PRIME_OM_OM47A88U_(U)
7-1. Maintenance and care
NOTICE
■When using a high pressure car wash
● When washing the vehicle, do not let water of the high pressure washer hit
directly or the vicinity of the camera. Due to the shock from the high pres-
sure water, it is possible the device may not operate as normal.
● Do not bring the nozzle tip close to boots (rubber or resin manufactured
cover), connectors or the following parts. The parts may be damaged if
they come into contact with high-pressure water.
• Traction related parts
• Steering parts
• Suspension parts
• Brake parts
● Do not wash the underside of the vehicle using a high pressure car
washer.
● Do not use the washer on the area around the charging port lid. Water
could get into the charging inlet and could damage the vehicle.
■ When raising the windshield wiper arms
Make sure to hold the hook parts of the
wiper arms to raise them.
Do not hold only the wiper blades when
raising them, or it may cause deformation
of the wiper blades.
Hook parts
Page 562 of 784

562
PRIUS PRIME_OM_OM47A88U_(U)
7-1. Maintenance and care
Clean the air intake vents and fil-
ters by the following procedures to
prevent dust from accumulating in
them, or to prevent them from
clogging.
The filters are attached to the back
side of the air intake vent grilles.
■
Cleaning the air intake vents and filters
Remove the dust from the vents
and filters with a vacuum
cleaner etc.
Clean the vents of the both
sides.
■
Cleaning the filters
If “Maintenance required for Traction battery cooling parts See
owner’s manual” is shown on the multi-information display, remove
the air intake vent grilles on the both sides of the rear seat and
clean the filters.
Insert a flathead screwdriver
etc. to the notch at the edge
of the grille to disconnect the
3 tabs, and remove the grille.
Turn over the rubber portion
beside the grille to insert the flat-
head screwdriver.
To prevent damage, cover the
tip of the flathead screwdriver
with a rag.
Cleaning the air intake vents and filters
1
Page 564 of 784

564
PRIUS PRIME_OM_OM47A88U_(U)
7-1. Maintenance and care
■Caring for leather areas
Toyota recommends cleaning the interior of the vehicle at least twice a year to
maintain the quality of the vehicle’s interior.
■ Shampooing the carpets
There are several commercial foaming-type cleaners available. Use a sponge
or brush to apply the foam. Rub in overlapping circles. Do not use water.
Wipe dirty surfaces and let them dry. Excellent results are obtained by keep-
ing the carpet as dry as possible.
■ Seat belts
Clean with mild soap and lukewarm water using a cloth or sponge. Also
check the belts periodically for excessive wear, fraying or cuts.
■ Cleaning the air intake vents and filters
●Dust on the air intake vents or filters may interferes cooling of the hybrid bat-
tery (traction battery) and results in poor electricity and fuel consumption.
Clean the air intake vents and filters periodically.
● If continuing to drive the vehicle with “Maintenance required for Traction bat-
tery cooling parts See owner’s manual” shown on the multi-information dis-
play, the hybrid battery (traction battery) may overheat, leading to
decreasing in distance that can be driven using the electric motor. It may
cause poor electricity and fuel consumption or a malfunction. If the warning
message is shown, clean the air intake vents and filters immediately.
● Improper handling may result in damage to the grille or filters. If you have
any concerns about cleaning the filters, contact your Toyota dealer.
● If the warning message on the multi-information display does not disappear
after cleaning the filters, have the vehicle inspected by your Toyota dealer.
● Timing of cleaning filters differs depending on the use environment of the
vehicle.
Page 568 of 784

568
PRIUS PRIME_OM_OM47A88U_(U)
7-2. Maintenance
■Repair and replacement
It is recommended that genuine Toyota parts be used for repairs to ensure
performance of each system. If non-Toyota parts are used in replacement or if
a repair shop other than a Toyota dealer performs repairs, confirm the war-
ranty coverage.
■ Resetting the message indicating maintenance is required (U.S.A. only)
After the required maintenance is preformed according to the maintenance
schedule, please reset the message.
To reset the message, follow the procedures described below:
While the hybrid system is operating, switch the multi-information display to
the screen. ( →P. 231)
Select “ (Vehicle Settings)”, and then press .
Select “Maintenance System”, and then press .
Select “Oil Maintenance”, and then press .
Select “Yes”, and then press .
■ Allow inspection and repairs to be performed by a Toyota dealer
●Toyota technicians are well-trained specialists and are kept up to date with
the latest service information. They are well informed about the operation of
all systems on your vehicle.
● Keep a copy of the repair order. It proves that the maintenance that has
been performed is under warranty cove rage. If any problem should arise
while your vehicle is under warranty, your Toyota dealer will promptly take
care of it.
A message will be displayed when the
reset procedure has been completed.
1
2
3
4
5
Page 574 of 784

574
PRIUS PRIME_OM_OM47A88U_(U)
7-3. Do-it-yourself maintenance
Do-it-yourself service precautions
If you perform maintenance by yourself, be sure to follow the
correct procedure as given in these sections.
ItemsParts and tools
12-volt battery
condition
(→ P. 587)•Grease
• Conventional wrench (for terminal clamp bolts)
Brake fluid level
(→ P. 590)• FMVSS No.116 DOT 3 or SAE J1703 brake fluid
• Rag or paper towel
• Funnel (used only for adding brake fluid)
Engine/power
control unit cool-
ant level
(→ P. 584)
• “Toyota Super Long Life Coolant” or a similar high
quality ethylene glycol-based non-silicate, non-
amine, non-nitrite and non-borate coolant with long-
life hybrid organic acid technology
For the U.S.A.:
“Toyota Super Long Life Coolant” is pre-mixed with
50% coolant and 50% deionized water.
For Canada:
“Toyota Super Long Life Coolant” is pre-mixed with
55% coolant and 45% deionized water.
• Funnel (used only for adding coolant)
Engine oil level
(→ P. 581)• “Toyota Genuine Motor Oil” or equivalent
• Rag or paper towel
• Funnel (used only for adding engine oil)
Fuses ( →P. 630)• Fuse with same amperage rating as original
Headlight aim
(→ P. 633)• Phillips-head screwdriver
Light bulbs
(→ P. 635)• Bulb with same number and wattage rating as origi-
nal
• Flathead screwdriver• Wrench
Radiator and con-
denser ( →P. 586)⎯