2018 TOYOTA PRIUS traction control

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4-5. Using the driving support systems
If the vehicle gets stuck in mud, di rt or snow, the TRAC system may
reduce power from the hybrid sy stem to the wheels. Pressing
to turn the system off may make it easier for you to rock the vehicle in
order to free it.
To turn the TRAC system off,
quickly press and release
.
The “Traction Control Turned Off”
will be shown on the multi-informa-
tion display. Press
again to
turn the system back on.
■ Turning off both TRAC and VSC systems
To turn the TRAC and VSC systems off, press and hold for more than
3 seconds while the vehicle is stopped.
The VSC OFF indicator light will come on and the “Traction Control Turned
Off” will be shown on the multi-information display.
*
Press again to turn the systems back on.
*: On vehicles with pre-collision system, pre-collision brake assist and pre-
collision braking will also be disabled. The PCS warning light will come on
and the message will be shown on the multi-information display. ( →P. 674)
■ When the message is displayed on th e multi-information display show-
ing that TRAC has been disable d even if has not been pressed
TRAC cannot be operated. Contact your Toyota dealer.
Disabling the TRAC system

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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. 611)•Grease
• Conventional wrench (for terminal clamp bolts)
Brake fluid level
(→ P. 614)
• 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. 608)
• “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. 605)• “Toyota Genuine Motor Oil” or equivalent
• Rag or paper towel
• Funnel (used only for adding engine oil)
Fuses ( →P. 649)• Fuse with same amperage rating as original
Hybrid battery
(traction battery)
air intake vent
(→ P. 637)• Vacuum cleaner, etc.
• Phillips screwdriver
Light bulbs
(→ P. 654)
• Bulb with same number and wattage rating as origi-
nal
• Phillips-head screwdriver
• Flathead screwdriver• Wrench
Radiator and con-
denser ( →P. 610)⎯

6888-2. Steps to take in an emergency
PRIUS_OM_OM47B89U_(U)■
If “Shift System Malfunction See Owner’s Manual” is shown
Indicates a malfunction in the shift control system. Immediately 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 Parking See
Owner’s Manual” is shown
Indicates that the 12-volt battery charge is insufficient. Charge or replace the
12-volt battery.
● When the message is shown, the hybrid system may not start or the shift
position may not be changed normally. (Coping method: →P. 690)
● 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. 729)
■ If “Hybrid System Overheated. Re duced Output Power.” is shown
The message may be shown when driving under severe operating conditions.
(For example, when driving up a long steep hill or driving up a steep hill in
reverse.)
Coping method: →P. 735
■ If “Maintenance required for Traction battery cooling parts See owner’s
manual” is shown
The cooling air intake vent and filter may be clogged, the cooling 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. 637 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 Pr otected Shift into to Restart” is
shown
Message is displayed when the remaining charge for the hybrid battery (trac-
tion battery) is low, because vehicle has been shifted to N for a certain period
of time.
When operating the vehicle, shift to P and restart the hybrid system.

6908-2. Steps to take in an emergency
PRIUS_OM_OM47B89U_(U)■
If “Maintenance Required Visit Your Dealer” is displayed (U.S.A. only)
Indicates that all maintenance is required to correspond to the driven distance
on the maintenance schedule
*.
Comes on approximately 5000 miles (8000 km) after the message has been
reset. (The indicator will not work properly unless the message has been
reset.)
Perform the necessary maintenance. Please reset the message after the
maintenance is performed. ( →P. 592)
*: Refer to the separate “Scheduled Maintenance Guide” or “Owner’s Manual
Supplement” for the maintenance interval applicable to your vehicle.
■ If the shift position cannot be change d or the power switch is turned to
ACCESSORY mode even if trying to turn the po wer 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. 243) 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. 680
NOTICE
■If “Have Traction Battery Inspected” 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 battery (traction
battery) inspected will cause the hybrid system not to start.
● If the hybrid system does not start, contact your Toyota dealer immedi-
ately.

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8-2. 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 not be functioning properly.
* (→ P. 726)
● There may not be sufficient fuel in the vehicle’s tank.
Refuel the vehicle. ( →P. 84)
● There may be a malfunction in the immobilizer system.
* (→ P. 8 9 )
● There may be a malfunction in the shift control system.
*
( → P. 234, 690)
● The hybrid system may be malfunctioning due to an electrical prob-
lem such as electronic key battery depletion or a blown fuse. How-
ever, depending on the type of malfunction, an interim measure is
available to start the hybrid system. (→ P. 725)
● There is a possibility that the temperature of the hybrid battery
(traction battery) is extremely low (approximately below -22°F
[-30°C]). ( →P. 84, 234)
*: 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. 729)
● The 12-volt battery terminal con nections may be loose or corroded.
( → P. 6 1 1 )
Reasons for the hybrid system not starting vary depending on
the situation. Check the follo wing and perform the appropriate
procedure:
The hybrid system will not start even though the correct starting
procedure is being followed. ( →P. 231)
The interior lights and headlights are dim, or the horn does not
sound or sounds at a low volume.

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9-1. Specifications
This information has been prepared in accordance with regulations
issued by the National Highway Traffic Safety Administration of the
U.S. Department of Transportation.
It provides the purchasers and/or prospective purchasers of Toyota
vehicles with information on uniform tire quality grading.
Your Toyota dealer will help answe r any questions you may have as
you read this information.
■DOT quality grades
All passenger vehicle tires must c onform to Federal Safety Require-
ments in addition to these grades. Quality grades can be found
where applicable on the tire sidewall between tread shoulder and
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 speci-
fied government test course.
For example, a tire graded 150 wo uld wear one and a half (1 - 1/2)
times as well on the government course as a tire graded 100.
The relative performance of tire s depends upon the actual condi-
tions of their use. Performance may differ significantly from the norm
due to variations in driving habits, service practices and differences
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 as
measured under controlled conditio ns on specified government test
surfaces of asphalt and concrete.
A tire marked C may have poor traction performance.
Warning: The traction grade assigned to this tire is based on braking
(straight ahead) traction tests and does not include cornering (turn-
ing) traction.
Uniform Tire Quality Grading

803Alphabetical index
PRIUS_OM_OM47B89U_(U)
Anti-lock brake system (ABS) ...................................... 408
Function ................................ 408
Warning light ......................... 674
Approach warning ................... 313
Armrest ..................................... 565
Assist grips .............................. 566
Audio input............................... 429
Audio system
(Entune Audio) ...................... 425 Antenna ................................ 443
Audio input ............................ 429
AUX port ............................... 460
Basic operations ................... 430
Bluetooth
® audio................... 472
CD player .............................. 444
iPod....................................... 450
MP3/WMA disc ..................... 444
Optimal use........................... 441
Portable music player ........... 429
Radio .................................... 442
Steering wheel audio switches.............................. 428
USB memory ........................ 455
Audio system (Entune Premium Audio with Navigation)
*
Automatic air conditioning system Air conditioning filter ............. 634
Automatic air conditioning system ....... ................. 516, 526
Climate control ...................... 519
Eco score (A/C score)........... 136
Humidity sensor ............ 523, 533
S-FLOW mode .............. 518, 528 Automatic door locking
and unlocking systems ........ 174
Automatic High Beam ............. 253
Automatic light control system.................................... 251
AUX port ................................... 429
Auxiliary boxes ........................ 545
Back door ................................. 177
Back-up lights Replacing light bulbs ............ 657
Wattage ................................ 754
Battery (12-volt battery)
Battery checking ................... 611
If the 12-volt battery is discharged.......................... 729
Preparing and checking before winter ...................... 418
Replacing.............................. 732
Warning light......................... 673
Battery (traction battery) .......... 82
Blind Spot Monitor (BSM) ....... 326
Bluetooth
®............................... 503
Audio system ....... ................. 472
Hands-free system (for cellular phone) ............. 474
Registering/removing a Bluetooth
® device ........... 466
Selecting a Bluetooth®
device ................................. 468
Wireless communication....... 461
B
*: Refer to the “NAVIGATION SYSTEM OWNER’S MANUAL”.

805Alphabetical index
PRIUS_OM_OM47B89U_(U)
CleaningAluminum wheels.................. 583
Camera sensor ..................... 277
Exterior ................................. 582
Hybrid battery (traction
battery) air intake vent ........ 637
Interior................................... 588
Radar sensor ........................ 276
Seat belts .............................. 589
Water-repellent coating......... 583
Coat hooks ............................... 565
Combination meter .................... 92
Clock adjustment .................... 97
Main display .......................... 107
Multi-information display ....... 114
Warning lights and indicators ............................ 100
Condenser ................................ 610
Console box ............................. 542
Coolant Capacity ................................ 750
Checking ............................... 608
Preparing and checking before winter....................... 418
Cooling system ........................ 608 Hybrid system overheating......................... 735
Consumption screen ....... 153, 158
Cruise control Cruise control........................ 319
Dynamic radar cruise
control with full-speed
range .................................. 304
Cup holders.............................. 543
Curtain shield airbags ............... 36
Customizable features ............ 770 Daytime running light
system.................................... 251
Deck board ............................... 546
Defogger Outside rear view
mirrors ........................ 520, 530
Rear window ................. 520, 530
Windshield .................... 520, 530
Dimension ................................ 744
Dinghy towing.......................... 230
Display BSM (Blind Spot Monitor) ..... 326
Drive information .................. 116
Dynamic radar cruise control with full-speed range .......... 304
Energy monitor ..... 117, 153, 158
Head-up display.................... 146
LDA (Lane Departure Alert with steering control) .......... 298
Multi-information display ....... 114
Parking assist
system ....... ................. 340, 367
Pre-collision warning ............ 281
Trip information..................... 109
Warning messages ............... 684
Do-it-yourself maintenance .... 598
Door courtesy lights ............... 538 Location ................................ 538
Wattage ................................ 754D