
252
PRIUS v_OM_OM47B23U_(U)
4-5. Using the driving support systems
■Reduced effectiveness of the EPS system
The effectiveness of the EPS system is reduced to prevent the system from
overheating when there is frequent steering input over an extended period of
time. The steering wheel may feel heavy as a result. Should this occur, refrain
from excessive steering input or stop the vehicle and turn the hybrid system
off. The EPS system should return to normal within 10 minutes.
■ Automatic reactivation of TRAC system
After turning the TRAC system off, the system will be automatically re-
enabled in the following situations:
●When the power switch is turned off
● The TRAC will turn on when vehicle speed increases
■ Electric power steering system warning light (warning buzzer)
P. 493
■ Operating conditions of hill-start assist control
When the following four conditions are met, the hill-start assist control will
operate:
●The shift position is in a position other than P or N (when starting off forward/
backward on an upward incline).
● The vehicle is stopped.
● The accelerator pedal is not depressed.
● The parking brake is not engaged.
■ Automatic system cancelation of hill-start assist control
The hill-start assist control will turn off in any of the following situations:
● Shift the shift position to P or N.
● The accelerator pedal is depressed.
● The parking brake is engaged.
● Approximately 2 seconds elapse after the brake pedal is released.

PRIUS v_OM_OM47B23U_(U)
2534-5. Using the driving support systems
4
Driving
WARNING
■The ABS does not operate effectively when
●The limits of tire gripping performance have been exceeded (such as
excessively worn tires on a snow covered road).
● The vehicle hydroplanes while driving at high speed on wet or slick road.
■ Stopping distance when the ABS is operating may exceed that of nor-
mal conditions
The ABS is not designed to shorten the vehicle’s stopping distance. Always
maintain a safe distance from the vehicle in front of you, especially in the
following situations:
● When driving on dirt, gravel or snow-covered roads
● When driving with tire chains
● When driving over bumps in the road
● When driving over roads with potholes or uneven surfaces
■ TRAC may not operat e effectively when
Directional control and power may not be achievable while driving on slip-
pery road surfaces, even if the TRAC system is operating.
Drive the vehicle carefully in conditions where stability and power may be
lost.
■ Hill-start assist control does not operate effectively when
●Do not overly rely on the hill-start assist control. The hill-start assist control
may not operate effectively on steep inclines and roads covered with ice.
● Unlike the parking brake, hill-start assist control is not intended to hold the
vehicle stationary for an extended period of time. Do not attempt to use
hill-start assist control to hold the vehicle on an incline, as doing so may
lead to an accident.
■ When the VSC is activated
The slip indicator light flashes. Always drive carefully. Reckless driving may
cause an accident. Exercise particular care when the indicator light flashes.
■ When the TRAC/VSC syst em is turned off
Be especially careful and drive at a speed appropriate to the road condi-
tions. As this is the system to help ensure vehicle stability and driving force,
do not turn the TRAC/VSC system off unless necessary.

4898-2. Steps to take in an emergency
PRIUS v_OM_OM47B23U_(U)
8
When trouble arises
Securely attach cables or chains to the towing eyelet.
Take care not to damage the vehicle body.
Enter the vehicle being towed and start the hybrid system.
If the hybrid system does not start, turn the power switch to ON mode.
Shift the shift position to N and release the parking brake.
■While towing
If the hybrid system is off, the power assist for the brakes and steering will not
function, making steering and braking more difficult.
■ Wheel nut wrench
Wheel nut wrench is installed in luggage compartment. ( P. 525)
WARNING
Observe the following precautions.
Failure to do so may result in death or serious injury.
■When towing the vehicle
■ While towing
●When towing using cables or chains, avoid sudden starts, etc. which place
excessive stress on the towing eyelet, cables or chains. The towing eyelet,
cables or chains may become damaged, broken debris may hit people and
cause serious damage.
● Do not turn the power switch off.
This may lead to an accident as the front wheels will be locked by the
parking lock.
■ Installing towing eyelets to the vehicle
●The towing eyelets are only for the vehicle equipped with them. Do not use
the towing eyelets for another vehicle, and do not use the towing eyelets
for this vehicle on another vehicle.
● Make sure that towing eyelets are installed securely.
If not securely installed, towing eyelets may come loose during towing.
5
6
7
Be sure to transport the vehicle with the
front wheels raised or with all four wheels
raised off the ground. If the vehicle is
towed with the front wheels contacting
the ground, the drivetrain and related
parts may be damaged or electricity gen-
erated by the operation of the motor may
cause a fire to occur depending on the
nature of the damage or malfunction.

4948-2. Steps to take in an emergency
PRIUS v_OM_OM47B23U_(U)
Slip indicator lightIndicates a malfunction in:
• The VSC system;
• The TRAC system; or
• The hill-start assist control system
Have the vehicle inspected by your Toyota dealer
immediately.
The light will flash when the above systems and/or ABS
are operating.
(If equipped)
Parking lock system warnin g light (warning buzzer)
Indicates a malfunction in the shift control system
• In this situation, there is a possibility that the parking lock mechanism will not work. When parking, park the
vehicle on a flat surface and apply the parking brake
securely.
• The power switch may not be turned off. If this happens, applying the parking brake will enable the switch to be
turned off.
Have the vehicle inspected by your Toyota dealer
immediately.
(If equipped)
Parking lock system warnin g message (warning buzzer)
Indicates a malfunction in the shift control system when
the vehicle is stopped
• In this situation, there is a possibility that the parking
lock mechanism will not work. When parking, park the
vehicle on a flat surface and apply the parking brake
securely.
• The power switch may not be turned off. If this happens, applying the parking brake will enable the switch to be
turned off.
Have the vehicle inspected by your Toyota dealer
immediately.
(If equipped)
LED headlight warning light
Indicates a malfunction in the LED headlights The LED headlights will not normally illuminate when
there is a malfunction, however they may be able to illu-
minate depending on the nature of the problem.
Have the vehicle inspected by your Toyota dealer
immediately.
Warning lightWarning light/Details/Actions

608Alphabetical index
PRIUS v_OM_OM47B23U_(U)
Bluetooth® audio ..................... 321
Bluetooth® phone .................... 323
Deleting the call history......... 343
Making a call ......................... 326
Managing the contacts.......... 339
Message function.................. 333
Phone settings ...................... 338
Receiving a call..................... 329
Speaking on the phone ......... 330
Bottle holders .......................... 380
Brake Fluid ...................................... 560
Parking brake........................ 190
Regenerative braking.............. 76
Warning light ......................... 492
Brake assist ............................. 248
Break-in tips ............................. 159
Brightness control Instrument panel light control ........................... 94
Card holder .............................. 382
Care Aluminum wheels.................. 409
Exterior ................................. 408
Interior................................... 412
Panoramic roof ..................... 411
Radar sensor ................ 228, 260
Seat belts .............................. 413
Cargo capacity ......................... 171
Cargo hooks............................. 383 CD player.................................. 293
Chains ...................................... 266
Child restraint system............... 59
Booster seats definition .......... 60
Booster seat installation ......... 69
Convertible seat definition ...... 60
Convertible seat installation.... 67
Front passenger occupant classification syst em ............ 53
Infant seat definition ............... 60
Infant seat installation ............. 66
Installing CRS with LATCH system .......... ..................... ... 64
Installing CRS with seat
belt ....................................... 66
Installing CRS with top tether strap ........................... 70
LATCH system ....... ................ 63
Child safety ................................ 58 12-volt battery
precautions......................... 444
Airbag precautions.................. 44
Back door precautions .......... 127
Child restraint system ............. 59
How your child should wear the seat belt ................. 36
Installing child restraints ......... 63
Power window lock switch .... 153
Power window precautions......................... 155
Rear door child-protectors .... 123
Removed key battery precautions......................... 465
Seat belt extender precautions........................... 40
Seat belt precautions .............. 38
Seat heater precautions ....... 374
C