2022 TOYOTA PRIUS traction control

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PRIUS_OM_OM47F01U_(U)
6-3. Do-it-yourself maintenance
Do-it-yourself ser vice 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. 5 2 0 )•Grease
• Conventional wrench (for terminal clamp bolts)
Brake fluid level
( P. 5 2 4 )
• SAE J1703 or FMVSS No.116 DOT 3 or SAE J1704
or FMVSS No.116 DOT 4 brake fluid
• Rag or paper towel
• Funnel (used only for adding brake fluid)
Engine/power
control unit cool-
ant level
( P. 5 1 8 )
• “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. 5 1 5 )• “Toyota Genuine Motor Oil” or equivalent
• Rag or paper towel
• Funnel (used only for adding engine oil)
Fuses ( P. 558)• Fuse with same amperage rating as original
Hybrid battery
(traction battery)
air intake vent
( P. 5 4 6 )• Vacuum cleaner, etc.
• Phillips screwdriver
Light bulbs
( P. 5 6 3 )
• Bulb with same number and wattage rating as origi-
nal
• Phillips screwdriver
• Flathead screwdriver• Wrench
Radiator and con-
denser ( P. 520)

6037-2. Steps to take in an emergency
PRIUS_OM_OM47F01U_(U)
7
When trouble arises
■If “Shift System Malfunction See Owner’s Manual” is shown
Indicates a malfunction in the shift control system. Immediatel y have the sys-
tem inspected by your Toyota dealer.
The system may not operate properly.
■ If “Low 12-Volt Battery Apply Parking Brake Securely While Park ing See
Owner’s Manual” is shown
Indicates that the 12-volt battery charge is insufficient. Char ge or replace the
12-volt battery.
● When the message is shown, the hybrid system may not start or t he shift
position may not be changed normally. (Coping method: P. 606)
● After charging the 12-volt battery, the message may not go off until the shift
position is changed from P.
■ If “Shifting Unavailable Low 12-Volt Battery See Owner’s Manual ” is
shown
Indicates that the shift position cannot be changed because the voltage of the
12-volt battery drops. Charge or replace the 12-volt battery.
(Coping method in the case the 12-volt battery is discharged: P. 646)
■ If “Hybrid System Overheated. Reduced Output Power.” is shown
The message may be shown when driving under severe operating co nditions.
(For example, when driving up a long steep hill or driving up a steep hill in
reverse.)
Coping method: P. 652
■ If “Maintenance Required for Traction Battery Cooling Parts See Owner’s
Manual” is shown
The filter may be clogged, the air intake vent may be blocked or there may be
a gap in the duct.
● If the air intake vent is dirty, refer to P. 546 for information on how to clean
the air intake vent.
● If the message is shown when the air intake vent is not dirty, have the vehi-
cle inspected by your Toyota dealer.
■ If “Traction Battery Needs to be Protected Refrain From the Use of
Position” is shown
This message may be displayed when the shift position is in N.
As the hybrid battery (traction battery) can not be charged when the shift
position is in N, shift the shift position to P when the vehicle is stopped.
■ If “Traction Battery Needs to be Protected Shift into to Resta rt” is
shown
This message is displayed when the hybrid battery (traction battery) charge
has become extremely low because the vehicle has been left with the N shift
position selected for a certain amount of time.
When operating the vehicle, shift to P and restart the hybrid s ystem.

6067-2. Steps to take in an emergency
PRIUS_OM_OM47F01U_(U)■
If the shift position cannot be changed or the power switch is turned to
ACCESSORY mode even if trying to turn the power switch off when a
warning message is shown
If the 12-volt battery is discharged or the shift control system is malfunction-
ing, the followings may occur.
● The shift position may not be changed to P.
When parking, stop the vehicle on level ground and apply the parking brake
firmly.
● The hybrid system may not start.
● The power switch may be turned to ACCESSORY mode even if trying to
turn the power switch off.
In this case, the power switch may be turned off after applying the parking
brake.
● The automatic P position selection function ( P. 252) may not operate.
Before turning the power switch off, be sure to press the P position switch
and check that the shift position is in P by the shift position indicator or P
position switch indicator.
■ Warning buzzer
P. 595
NOTICE
■If “Maintenance Required for Traction Battery at Your Dealer” is shown
The hybrid battery (traction battery) is scheduled to be inspected or
replaced. Have the vehicle inspected by your Toyota dealer immediately.
● Continuing to drive the vehicle without having the hybrid batte ry (traction
battery) inspected will cause the hybrid system not to start.
● If the hybrid system does not start, contact your Toyota dealer immedi-
ately.

641
PRIUS_OM_OM47F01U_(U)
7
When trouble arises
7-2. Steps to take in an emergency
If the hybrid system will not start
One of the following may be the cause of the problem:
● The electronic key may no t be functioning properly.
* ( P. 643)
● There may not be sufficient f uel in the vehicle’s tank.
Refuel the vehicle. ( P. 91)
● There may be a malfunction in the immobilizer system.
* ( P. 9 6 )
● There may be a malfunction i n the shift control system.
*
(  P. 243, 606)
● The hybrid system may be malfunc tioning due to an electrical prob-
lem such as electronic key battery depletion or a blown fuse. H ow-
ever, depending on the type of malfunction, an interim measure is
available to start the hybrid system. ( P. 642)
● There is a possibility that the t emperature of the hybrid battery
(traction battery) is extremely low (approximately below -22°F
[-30°C]). ( P. 91, 242)
*: It may not be possible to shift the shift position other than P.
One of the following may be the cause of the problem:
● The 12-volt battery may be discharged. ( P. 646)
● The 12-volt battery terminal connections may be loose or corrod ed.
(  P. 520)
Reasons for the hybrid system not starting vary depending on
the situation. Check the followi ng and perform the appropriate
procedure:
The hybrid system will not start even though the correct starting
procedure is being followed. ( P. 239)
The interior lights and headlights are dim, or the horn does no t
sound or sounds at a low volume.

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PRIUS_OM_OM47F01U_(U)
8-1. Specifications
This information has been prepared in accordance with regulations
issued by the National Highway Tr affic Safety Administration of the
U.S. Department of Transportation.
It provides the purchasers and/or prospective purchasers of Toyota
vehicles with info rmation on uniform ti re quality grading.
Your Toyota dealer will help answer any questions you may have as
you read this information.
■DOT quality grades
All passenger vehicle tires must conform to Federal Safety Requ ire-
ments in addition to these grades. Quality grades can be found
where applicable on the tire sidewall between tread shoulder an d
maximum section width.
For example: Treadwear 200 Traction AA Temperature A
■Treadwear
The treadwear grade is a comparative rating based on the wear
rate of the tire when tested under controlled conditions on a s peci-
fied government t est course.
For example, a tire graded 150 would wear one and a half (1 - 1 /2)
times as well on the governmen t course as a tire graded 100.
The relative performance of tires depends upon the actual condi -
tions of their use. Performance ma y differ significantly from the norm
due to variations in driving habits, service practices and diff erences
in road characteristics and climate.
■Traction AA, A, B, C
The traction grades, from highest to lowest, are AA, A, B and C ,
and they represent the tire’s ability to stop on wet pavement a s
measured under controlled conditions on specified government te st
surfaces of asphalt and concrete.
A tire marked C may have p oor traction performance.
Warning: The traction grade assigned to this tire is based on b raking
(straight ahead) traction tests and does not include cornering (turn-
ing) traction.
Uniform Tire Quality Grading

721Alphabetical index
PRIUS_OM_OM47F01U_(U)
Anti-lock brake system (ABS) ...................................... 415
Function ................................ 415
Warning light ......................... 589
Approach warning ................... 331
Armrest ..................................... 480
Assist grips .............................. 481
Audio input
*
Audio system*
Automatic air conditioning system ............................ 430, 440
Air conditioning eco mode .......................... 433, 443
Air conditioning filter ............. 543
Automatic air conditioning
system ....... ................. 430, 440
Eco score (A/C score)........... 148
Front seat concentrated
airflow mode
(S-FLOW) ................... 432, 442
Automatic door locking and unlocking systems ................ 184
Automatic High Beam
(AHB) ...................................... 262
Automatic light control system .................................... 260
AUX port
*
Auxiliary box ............................ 459 Back door ................................. 187
Back-up light............................ 564
Replacing light bulb .............. 567
Wattage ................................ 670
Battery (12-volt battery) .......... 520
Battery checking ................... 520
If the 12-volt battery is discharged.......................... 646
Preparing and checking before winter ...................... 425
Replacing.............................. 649
Warning light......................... 588
Battery (traction battery) .......... 89 Air intake vent ......................... 90
Location .................................. 89
Specification ......................... 663
Blind Spot Monitor (BSM) ....... 344
Blind Spot Monitor function............................... 349
Rear Cross Traffic Alert
function............................... 352
Bluetooth
®*
B
*: Refer to “NAVIGATION SYSTEM OWNER’S MANUAL” or “MULTIMEDIA OWNER’S MANUAL”.

723Alphabetical index
PRIUS_OM_OM47F01U_(U)
CleaningAluminum wheels.................. 493
Exterior ................................. 492
Front camera ........................ 285
Hybrid battery (traction
battery) air intake vent ........ 546
Interior................................... 498
Radar sensor ........................ 284
Seat belts .............................. 499
Water-repellent coating......... 493
Clock ........................................... 98
Adjustment ............................ 103
Coat hooks ............................... 480
Combination meter .................... 98 Clock adjustment .................. 103
Main display .......................... 115
Multi-information display ....... 124
Warning lights and indicators ............................ 107
Condenser ................................ 520
Console box ............................. 456
Consumption screen ....... 165, 170
Coolant ..................................... 518
Capacity ................................ 666
Checking ............................... 518
Preparing and checking before winter....................... 425
Cooling system ........................ 518 Engine overheating ............... 652
Hybrid system overheating ... 654
Cruise control Cruise control........................ 337
Dynamic radar cruise control with full-speed range .......... 321
Cup holders.............................. 457
Curtain shield airbags ............... 35
Customizable features ............ 686 Daytime running light
system.................................... 260
Deck board ............................... 461
Defogger Outside rear view
mirrors ........................ 434, 444
Rear window ................. 434, 444
Windshield .................... 434, 444
Dimension ................................ 660
Dinghy towing.......................... 238
Display BSM (Blind Spot Monitor) ..... 344
Drive information .................. 126
Dynamic radar cruise control with full-speed range .......... 321
Energy monitor ..... 127, 165, 170
Head-up display.................... 158
Intuitive parking assist .......... 359
LTA (Lane Tracing Assist) .... 311
Main display.......................... 115
Multi-information display ....... 124
Parking Support Brake function............................... 376
RCTA detection screen ........ 344
RSA (Road Sign Assist) ....... 318
S-APGS (Simple Advanced Parking Guidance
System) .............................. 385
Pre-collision warning ............ 292
Trip information..................... 119
Warning messages ............... 599
Do-it-yourself maintenance .... 508
Door courtesy lights ............... 452 Location ................................ 452
Wattage ................................ 670D
*: Refer to “MULTIMEDIA OWNER’S MANUAL”.

724Alphabetical index
PRIUS_OM_OM47F01U_(U)
DoorsAutomatic door locking and
unlocking system ................ 184
Back door.............................. 187
Door glasses ......................... 212
Door lock............................... 181
Open door warning buzzer ... 185
Open door warning light........ 590
Outside rear view mirrors...... 210
Rear door child-protectors .... 184
Side doors............................. 181
Side windows ........................ 212
Drive information ..................... 126
Drive-Start Control (DSC) ....... 223 Sudden start restraint control................................. 223
Driver’s seat belt reminder
light......................................... 591
Driving ...................................... 222 Break-in tips .......................... 224
Correct driving posture ........... 28
Driving in the rain .................. 223
Driving mode select switch ... 342
Hybrid vehicle driving tips ..... 422
Procedures ........................... 222
Winter drive tips .................... 425
DSC (Drive-Start Control) ....... 223
Sudden start restraint control................................. 223
Dynamic radar cruise control
with full-speed range ............ 321
ECB (Electronically Controlled Brake System) .... 415
Eco drive mode ........................ 342
EDR (Event data recorder) ........ 11
Electric motor (traction motor) Location .................................. 84
Specification ......................... 663 Electric Power Steering
(EPS) ...................................... 416
Function ................................ 416
Warning light......................... 589
Electronic key .......................... 176
Battery-saving function ......... 194
If the electronic key does not operate properly ........... 643
Replacing the battery............ 555
Electronically Controlled Brake System (ECB) ............. 415
Emergency flashers ................ 576
Emergency tire puncture repair kit ................................. 609
Emergency, in case of If a warning buzzer sounds... 588
If a warning light turns on ..... 588
If a warning message is displayed ............................ 599
If the 12-volt battery is
discharged.......................... 646
If the electronic key does not operate properly ........... 643
If the hybrid system will not start .............................. 641
If the vehicle becomes stuck ................................... 657
If the vehicle is submerged or water on the road is
rising................................... 578
If you have a flat tire ..... 607, 627
If you lose your keys ..... 177, 180
If you think something is wrong .............................. 587
If your vehicle has to be stopped in an emergency ... 577
If your vehicle needs to be towed.................................. 580
If your vehicle overheats....... 652
Energy monitor ........ 127, 165, 170
E