battery replacement TOYOTA PRIUS PRIME 2021 Owners Manual (in English)

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9 8
7
6 4 3
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PRIUS PRIME_OM_OM47D71U_(U)
10
5
6-4. Using the other interior
features
Other interior features ....... 553
• Sun visors ..................... 553
• Vanity mirrors................ 553
• Power outlets ................ 554
• USB charging ports....... 555
• Wireless charger ........... 557
• Armrest ......................... 566
• Coat hooks.................... 566
• Assist grips ................... 567
Garage door opener .......... 5687-1. Maintenance and care
Cleaning and protecting
the vehicle exterior .......... 576
Cleaning and protecting
the vehicle interior ........... 581
7-2. Maintenance
Maintenance
requirements ................... 587
General maintenance ........ 590
Emission inspection and
maintenance (I/M)
programs ......................... 593
7-3. Do-it-yourself maintenance
Do-it-yourself service
precautions ...................... 594
Hood .................................. 597
Positioning a floor jack....... 599
Engine compartment ......... 600
Tires................................... 614
Tire inflation pressure ........ 623
Wheels............................... 626
Replacing the tire............... 629
Air conditioning filter .......... 640
Wiper insert
replacement..................... 644
Electronic key battery ........ 647
Checking and replacing
fuses ................................ 650
Headlight aim..................... 653
Light bulbs ......................... 655
7Maintenance and care

104
PRIUS PRIME_OM_OM47D71U_(U)
2-1. Plug-in hybrid system
NOTICE
■Hybrid battery (traction battery) air vents
●Make sure not to block the air intake vent with anything, such as a seat
cover, plastic cover, or luggage. If the vents are blocked, the charging/dis-
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500044005c00030045004800460052005000480003004f004c[mited.
●When dust etc. has accumulated in the air intake vent, clean it with a vac-
uum cleaner to prevent the vent from clogging.
●Do not wet or allow foreign substances to enter the air vents as this may
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5c0003000b00570055004400460057004c0052005100030045[attery).
●Do not carry large amounts of water such as water cooler bottles in the
vehicle. If water spills onto the hybrid battery (traction battery), the battery
may be damaged. Have the vehicle inspected by your Toyota dealer.
●A filter is installed to the air intake vent. When the filter remains noticeably
dirty even after cleaning the air intake vent, filter cleaning or replacement
is recommended. When cleaning the filter, refer to P. 582.
■Notice about fuel
●For plug-in hybrid vehicles, fuel may remain in the tank for a long time and
undergo changes in quality depending on the how the vehicle is used.
Refuel at least 5.3 gal. (20 L, 4.4 Imp.gal.) of fuel every 12 months (refuel
a total of at least 5.3 gal. [20 L, 4.4 Imp.gal.] over a 12-month period), as
this may affect components of the fuel system or the gasoline engine.
●If the vehicle has not been refueled for a certain amount of time and it is
possible that the quality of the fuel remaining in the tank has changed, “No
new fuel has been added recently. Please refuel” is displayed on the multi-
information display when the power switch is turned to ON mode. If the
message is displayed, refuel the vehicle immediately.

PRIUS PRIME_OM_OM47D71U_(U)
1993. Instrument cluster
3
Instrument cluster
■The meters and display illuminate when
The power switch is in ON mode.
■Adjusting the instrument cluster brightness (P. 194)
●The brightness levels that can be selected differ depending on whether the
tail lights are on and surrounding brightness levels, as shown in the table
below.
*: 22 levels of the brightness are displayed on the setting screen. However,
the brightness setting will be the brightest when other than 1st level (the
darkest) is selected. If other than 1st or 22nd level is selected, when the
tail lights are turned on in a dark place, the instrument cluster brightness
setting will be the selected level.
●If the taillights are illuminated in a dark environment, the instrument cluster
light dims. However, when the brightness of the instrument cluster is set to
minimum or maximum (1st or 22nd level of the instrument cluster bright-
ness), even if the taillights are illuminated, the instrument cluster light will
not dim.
■When disconnecting and reconnecting 12-volt battery terminals
The settings of the clock will be reset.
■Calendar setting
●Until the calendar setting is completed, the check screen is displayed every
time the power switch is turned to ON mode.
●After the calendar information is set, it can be changed in the “Meter Cus-
tomize” settings. (P. 248)
The tail lights are offThe tail lights are on
In a bright place2 levels*2 levels*
In a dark place22 levels
If calendar recording is interrupted due to
replacement of the 12-volt battery or 12-
volt battery discharge, etc., when the
power switch is turned to ON mode after
maintenance, the calendar setting check
screen is automatically displayed on the
multi-information display.
●If date information is not set, the electric-
ity and fuel consumption record cannot
be stored correctly. Also, the charging
schedule function can not operate prop-
erly. When the calendar setting check
screen is displayed, make sure to com-
plete the calendar setting. (P. 246)

278
PRIUS PRIME_OM_OM47D71U_(U)
4-1. Key information
■Electronic key battery depletion
●The standard battery life is 1 to 2 years.
●If the battery becomes low, an alarm will sound in the cabin and a message
will be displayed on the multi-information display when the hybrid system
stops.
●As the electronic key always receives radio waves, the battery will become
depleted even if the electronic key is not used. The following symptoms indi-
cate that the electronic key battery may be depleted. Replace the battery
when necessary. (P. 647)
• The smart key system or the wireless remote control does not operate.
• The detection area becomes smaller.
• The LED indicator on the key surface does not turn on.
You can replace the battery by yourself (P. 647). However, as there is a
danger that the electronic key may be damaged, it is recommended that
replacement is carried out by your Toyota dealer.
●To avoid serious deterioration, do not leave the electronic key within 3 ft.
(1 m) of the following electrical appliances that produce a magnetic field:
•TVs
• Personal computers
• Cellular phones, cordless phones and battery chargers
• Table lamps
• Induction cookers

PRIUS PRIME_OM_OM47D71U_(U)
5236-1. Using the air conditioning system and defogger
6
Interior features
NOTICE
■Humidity sensor
●Do not spray the glass cleaner on the sensor or subject it to strong impacts
●Do not stick anything on the sensor
■To prevent 12-volt battery discharge
Do not leave the air conditioning system on longer than necessary when the
hybrid system is off.
■When repairing/replacing parts of the air conditioning system
Have repair/replacement performed by your Toyota dealer. When a part of
the air conditioning system, such as the evaporator, is to be replaced, it
must be replaced with a new one.
■Air outlets
The air outlets become hot when used for heating. Therefore, use caution
and adjust the air outlets accordingly.
In order to detect fog on the windshield, a
sensor which monitors the temperature
of the windshield, the surround humidity,
etc. is installed. (P. 520)
Follow these points to avoid damaging
the sensor:
●Do not disassemble the sensor

5346-1. Using the air conditioning system and defogger
PRIUS PRIME_OM_OM47D71U_(U)
NOTICE
■Humidity sensor
●Do not spray the glass cleaner on the sensor or subject it to strong impacts
●Do not stick anything on the sensor
■To prevent 12-volt battery discharge
Do not leave the air conditioning system on longer than necessary when the
hybrid system is off.
■When repairing/replacing parts of the air conditioning system
Have repair/replacement performed by your Toyota dealer. When a part of
the air conditioning system, such as the evaporator, is to be replaced, it
must be replaced with a new one.
■Air outlets
The air outlets become hot when used for heating. Therefore, use caution
and adjust the air outlets accordingly.
In order to detect fog on the windshield, a
sensor which monitors the temperature
of the windshield, the surround humidity,
etc. is installed. (P. 531)
Follow these points to avoid damaging
the sensor:
●Do not disassemble the sensor

575
PRIUS PRIME_OM_OM47D71U_(U)
7Maintenance and care
7-1. Maintenance and care
Cleaning and protecting
the vehicle exterior .......... 576
Cleaning and protecting
the vehicle interior ........... 581
7-2. Maintenance
Maintenance
requirements ................... 587
General maintenance........ 590
Emission inspection and
maintenance (I/M)
programs......................... 593
7-3. Do-it-yourself maintenance
Do-it-yourself service
precautions ..................... 594
Hood ................................. 597
Positioning a floor jack ...... 599
Engine compartment ......... 600
Tires .................................. 614
Tire inflation pressure ....... 623
Wheels .............................. 626
Replacing the tire .............. 629
Air conditioning filter.......... 640
Wiper insert
replacement .................... 644
Electronic key battery........ 647
Checking and replacing
fuses ............................... 650
Headlight aim .................... 653
Light bulbs......................... 655

642
PRIUS PRIME_OM_OM47D71U_(U)
7-3. Do-it-yourself maintenance
■Checking interval
Inspect and replace the air conditioning filter according to the maintenance
schedule. In dusty areas or areas with heavy traffic flow, early replacement
may be required. (For scheduled maintenance information, please refer to the
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5800530053004f0048005000480051005700b40011000c[
■If air flow from the vents decreases dramatically
The filter may be clogged. Check the filter and replace if necessary.
WARNING
■When replacing the air conditioning filter
Observe the following precautions. Failure to do so may result in the air
conditioning system operating during the procedure, possibly resulting in
injury.
●Check that the charging connector is not connected
The air conditioning may operate due to the “Climate Prep” (P. 157) or
“Traction Battery Cooler” (P. 136) setting.
●Do not use the Remote Air Conditioning System

736
PRIUS PRIME_OM_OM47D71U_(U)
9-1. Specifications
*: The fluid capacity is the quantity of reference.
If replacement is necessary, contact your Toyota dealer.
Electrical system (12-volt battery)
Open voltage at 68F (20C):
12.0 V or higher
If the voltage is lower than the standard
value, charge the battery. (After charging
the battery, turn on the high beam head-
lights for 30 seconds with the power switch
off, and turn the headlights off.)
Charging rates5 A max.
Transmission
Fluid capacity*3.9 qt. (3.7 L, 3.3 Imp.qt.)
Fluid typeToyota Genuine ATF WS
NOTICE
■Transmission fluid type
Using transmission fluid other than the above type may cause abnormal
noise or vibration, or ultimately damage the transmission of your vehicle.

804Alphabetical index
PRIUS PRIME_OM_OM47D71U_(U)
Warning messages .................. 684
Warning reflector storage
space ...................................... 550
Washer...................................... 365
Checking ............................... 612
Preparing and checking
before winter....................... 507
Switch ................................... 365
Washing and waxing ............... 576
Water-repellent coating........... 577
Weights..................................... 730
Cargo capacity ...................... 335
Load limits............................. 730
Wheels ...................................... 626
Replacing wheels.................. 629
Size ....................................... 737
Window glasses....................... 314
Window lock switch ................ 314Windows................................... 314
Power windows..................... 314
Rear window
defogger ..................... 516, 527
Washer ................................. 365
Windshield wipers ................... 365
Handling the wiper arms ....... 580
Rain-sensing windshield
wipers ................................. 367
Replacing the wiper insert .... 644
Winter driving tips ................... 507
Wiper insert replacement ....... 644
Wireless charger ..................... 557
Wireless remote control ......... 276
Battery-Saving Function ....... 294
Locking/Unlocking ................ 282
Panic mode........................... 277
Remote Air Conditioning
System ............................... 535
Replacing the battery............ 647
WMA disc
*