2021 TOYOTA PRIUS maintenance

PRIUS_OM_OM47E09U_(U)
Pictorial indexSearch by illustration
1For safety
and securityMake sure to read through them
2Instrument
clusterHow to read the gauges and meters, the variety of
warning lights and indicators, etc.
3Operation of
each componentOpening and closing the doors and windows,
adjustment before driving, etc.
4DrivingOperations and advice which are necessary for
driving
5Interior featuresUsage of the interior features, etc.
6Maintenance
and careCaring for your vehicle and maintenance
procedures
7When trouble
arisesWhat to do in case of malfunction or emergency
8Vehicle
specificationsVehicle specifications, customizable features, etc.
9For ownersReporting safety defects for U.S. owners, and seat
belt, SRS airbag and headlight aim instructions for
Canadian owners
IndexSearch by symptom
Search alphabetically

TABLE OF CONTENTS4
PRIUS_OM_OM47E09U_(U)5-1. Using the air conditioning
system and defogger
Automatic air conditioning system (vehicles with
7-inch display) ................. 436
Automatic air conditioning system (vehicles with
11.6-inch display) ............ 446
Heated steering wheel/ seat heaters .................... 456
5-2. Using the interior lights Interior lights list ................ 458• Front interior light .......... 459
• Front personal lights ..... 459
• Rear interior light .......... 460
5-3. Using the storage features
List of storage features...... 461 • Glove box...................... 462
• Console box .................. 462
• Cup holders .................. 463
• Bottle holders/door pockets ................. 464
• Auxiliary boxes .............. 465
• Seat back pockets ........ 466
Luggage compartment features ........................... 467 5-4. Using the other interior
features
Other interior features........ 473 • Sun visors ..................... 473
• Vanity mirrors ................ 473
• Power outlets ................ 474
• USB charging ports ....... 475
• Wireless charger ........... 477
• Armrest.......................... 486
• Coat hooks .................... 486
• Assist grips .................... 487
Garage door opener .......... 488
6-1. Maintenance and care Cleaning and protecting the vehicle exterior .......... 496
Cleaning and protecting the vehicle interior ........... 502
6-2. Maintenance Maintenance requirements ................... 505
General maintenance ........ 508
Emission inspection and maintenance (I/M)
programs ......................... 511
5Interior features
6Maintenance and care

5
1
9 8
7
6 4 3
2
PRIUS_OM_OM47E09U_(U)
5
6-3. Do-it-yourself maintenance
Do-it-yourself service precautions ..................... 512
Hood.................................. 515
Positioning a floor jack ...... 517
Engine compartment ......... 518
Tires .................................. 532
Tire inflation pressure........ 542
Wheels .............................. 545
Air conditioning filter .......... 548
Cleaning the hybrid battery (traction battery) air intake
vent and filter .................. 551
Wiper insert replacement .................... 556
Electronic key battery ........ 560
Checking and replacing fuses ............................... 563
Headlight aim .................... 566
Light bulbs ......................... 568
7-1. Essential information Emergency flashers .......... 580
If your vehicle has to be stopped in an
emergency ...................... 581
If the vehicle is trapped in rising water...................... 582 7-2. Steps to take in an
emergency
If your vehicle needs to be towed .......................... 584
If you think something is wrong............................... 591
If a warning light turns on or a warning buzzer
sounds ............................. 592
If a warning message is displayed ......................... 603
If you have a flat tire (vehicles without
spare tire) ........................ 611
If you have a flat tire (vehicles with
spare tire) ........................ 631
If the hybrid system will not start ........................... 645
If the electronic key does not operate properly ........ 647
If the 12-volt battery is discharged ....................... 650
If your vehicle overheats.... 656
If the vehicle becomes stuck ................................ 661
7When trouble arises

TABLE OF CONTENTS6
PRIUS_OM_OM47E09U_(U)8-1. Specifications
Maintenance data (fuel, oil level, etc.) .......... 664
Fuel information ................ 675
Tire information ................. 678
8-2. Customization Customizable features ...... 690
8-3. Initialization Items to initialize................ 701 Reporting safety defects
for U.S. owners ........................ 704
Seat belt instructions for Canadian owners
(in French)................................ 705
SRS airbag instructions for Canadian owners
(in French)................................ 707
Headlight aim instructions for Canadian owners
(in French)................................ 716
What to do if... (Troubleshooting) ..................... 720
Alphabetical index ...................... 724
8Vehicle specifications9For owners
Index
For vehicles with the navigation system, refer to the “NAVIGATI ON
SYSTEM OWNER’S MANUAL” for information regarding the equip-
ment listed below.
• Navigation system
• Audio/visual system
• Rear view monitor system• Hands-free system (for cellular phone)
For vehicles with the multimedia system, refer to the “MULTIMED IA
OWNER’S MANUAL” for information regarding the equipment listed
below.
• Audio/visual system
• Rear view monitor system• Hands-free system (for cellular phone)

871-4. Hybrid system
PRIUS_OM_OM47E09U_(U)
1
For safety and security
■Sounds and vibrations sp ecific to a hybrid vehicle
There may be no engine sound or vibration even though the vehic le is able to
move with the “READY” indicator is illuminated. For safety, app ly the parking
brake and make sure to shift the shift position to P when parke d.
The following sounds or vibrations may occur when the hybrid sy stem is
operating and are not a malfunction:
● Motor sounds may be heard from the engine compartment.
● Sounds may be heard from the hybrid battery (traction battery) under the
rear seats when the hybrid system starts or stops.
● Relay operating sounds such as a snap or soft clank will be emi tted from the
hybrid battery (traction battery), under the rear seats, when the hybrid sys-
tem is started or stopped.
● Sounds from the hybrid system may be heard when the back door is open.
● Sounds may be heard from the transmission when the gasoline engine
starts or stops, when driving at low speeds, or during idling.
● Engine sounds may be heard when accelerating sharply.
● Sounds may be heard due to regenerative braking when the brake pedal is
depressed or as the accelerator pedal is released.
● Vibration may be felt when the gasoline engine starts or stops.
● Cooling fan sounds may be heard from the air intake vent. ( P. 89)
■ Vehicle proximity notification system
In the following cases, the vehicle proximity notification syst em may be diffi-
cult for surrounding people to hear.
● In very noisy areas
● In the wind or the rain
Also, as the vehicle proximity notification system is installed on the front of
the vehicle, it may be more difficult to hear from the rear of the vehicle com-
pared to the front.
■ When “Proximity Notification Syst em Malfunction Visit Your Dealer” is
displayed on the multi-information display
The vehicle proximity notification system may be malfunctioning . Have the
vehicle inspected by your Toyota dealer immediately.
■ Maintenance, repair, recycling, and disposal
Contact your Toyota dealer regarding maintenance, repair, recyc ling and dis-
posal. Do not dispose of the vehicle yourself.

941-4. Hybrid system
PRIUS_OM_OM47E09U_(U)
NOTICE
■Hybrid battery (traction battery) air intake vent
● Make sure not to block the air intake vent with anything, such as a seat
cover, plastic cover, or luggage. If the vent is blocked, the charging/dis-
charging of the hybrid battery (traction battery) may become li 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 get water or foreign materials in the air intake vent as this may
cause a short circuit and damage the hybrid battery (traction b attery).
● Do not carry large amounts of water such as water cooler bottle s in the
vehicle. If water spills onto the hybrid battery (traction batt ery), the battery
may be damaged. Have the vehicle inspected by your Toyota deale r.
● There is a filter installed to the air intake vent. When the fi lter remains
noticeably dirty even after cleaning the air intake vent, filte r cleaning or
replacement is recommended. For information regarding filter cl eaning or
replacement, refer to P. 551.
● If “Maintenance required for Traction battery cooling parts See owner’s
manual” is shown on the multi-information display, the air intake vent and
filter may be clogged. Refer to P. 551 for information on how to clean the
air intake vent.

951-5. Theft deterrent system
PRIUS_OM_OM47E09U_(U)
1
For safety and security
Immobilizer system
The indicator light flashes after
the power switch has been turned
off to indicate that the system is
operating.
The indicator light stops flashing
after the power switch has been
turned to ACCESSORY or ON
mode to indicate that the system
has been canceled.
■System maintenance
The vehicle has a maintenance-free type immobilizer system.
■ Conditions that may cause the system to malfunction
●If the grip portion of the key is in contact with a metallic ob ject
● If the key is in close proximity to or touching a key registered to the security
system (key with a built-in transponder chip) of another vehicle
The vehicle’s keys ha ve built-in transponder chips that prevent
the hybrid system from starting if a key has not been previousl y
registered in the vehic le’s on-board computer.
Never leave the keys inside the vehicle when you leave the vehi-
cle. This system is designed to help prevent vehicle theft but does not
guarantee absolute security against all vehicle thefts.

PRIUS_OM_OM47E09U_(U)
1052. Instrument cluster
2
Instrument cluster
■When disconnecting and reconnecting 12-volt battery terminals
The settings of the clock will be reset.
■ Calendar settings
●Until the calendar settings are set, the check screen is displa yed 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. 153)
■ When the menu screen on the navi gation system is operated (vehicles
with 11.6-inch display)
■ Liquid crystal display
Small spots or light spots may appear on the display. This phen omenon is
characteristic of liquid crystal displays, and there is no prob lem continuing to
use the display.
■ Pop-up display
Some functions, such as the driving mode select switch and air conditioning
system, are operation-linked and display pop-up screens on the multi-infor-
mation display. If the pop-up screens of these functions are not desired, they
can be turned off in the “Meter Customize” settings. ( P. 153)
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 settings check
screen is automatically displayed on the
multi-information display.
●
If date information is not set, the fuel
consumption record cannot be stored
correctly. When the calendar settings
check screen is displayed, make sure to
always set the settings. ( P. 151)
A pop-up display of the menu screen icon
is displayed on the multi-information dis-
play.
*
*
: The pop-up display on the navigation
system can be turned off in the “Meter
Customize” settings. ( P. 153)