Page 269 of 600

2694-6. Using the driving support systems
4
Driving
PRIUS c_U
WARNING
■The ABS does not operate effectively when
● The limits of tire gripping performance have been exceeded (suc h as
excessively worn tires on a snow covered road).
● The vehicle hydroplanes while driving at high speed on wet or s lick roads.
■ 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, espe cially 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/VSC may not operate effectively when
Directional control and power may not be achievable while driving on slip-
pery road surfaces, even if the TRAC/VSC system is operating.
Drive the vehicle carefully in conditions where stability and p ower may be
lost.
■ Hill-start assist control does not operate effectively when
● Do not overly rely on hill-start assist control. Hill-start ass ist control may
not operate effectively on steep inclines and roads covered wit h ice.
● Unlike the parking brake, hill-start assist control is not inte nded 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 TRAC/ABS/VSC are 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 systems are turned off
Be especially careful and drive at a speed appropriate to the r oad condi-
tions. As these are the systems to help ensure vehicle stabilit y and driving
force, do not turn the TRAC/VSC systems off unless necessary.
Page 364 of 600
3645-10. Bluetooth® phone (Multimedia system)
PRIUS c_U
In other situations
Even though all conceivable measures have been taken, the symptom sta-
tus does not change.
The cellular phone is not close enough to this system.
Bring the cellular phone closer to this system.
The cellular phone is the most likely cause of the symptom.
Turn the cellular phone off, remove and reinstall the battery pack,
and then restart th e cellular phone.
Enable the cellular phone’s Bluetooth
® connection.
Stop the cellular phone’s security software and close all appli ca-
tions.
Before using an application installed on the cellular phone, ca re-
fully check its source and how it s operation might affect this sys-
tem.
Page 467 of 600
467
8When trouble arises
PRIUS c_U8-1. Essential information
Emergency flashers .......... 468
If your vehicle has to be stopped in
an emergency ................. 469
If the vehicle is trapped in rising water.................. 471
8-2. Steps to take in an emergency
If your vehicle needs to be towed ..................... 472
If you think something is wrong .......................... 479
If a warning light turns on or a warning buzzer
sounds ............................ 480
If a warning message is displayed ..................... 488
If you have a flat tire.......... 505
If the hybrid system will not start ..................... 518
If the electronic key does not operate properly ........ 520
If the vehicle 12-volt battery is discharged ....... 522
If your vehicle overheats ........................ 529
If the vehicle becomes stuck ................ 533
Page 521 of 600

5218-2. Steps to take in an emergency
8
When trouble arises
PRIUS c_U
Firmly depress the brake pedal and check that is displayed
on the multi-information display.
Press the power switc h shortly and firmly.
In the event that the power s witch still cannot be operated, co ntact
your Toyota dealer.
■ Stopping the hybrid system
Shift the shift lever to P and press the power switch as you normally do when
stopping the hybrid system.
■ Replacing the key battery
As the above procedure is a temporary measure, it is recommende d that the
electronic key battery be replaced immediately when the battery is depleted.
( P. 451)
■ Changing power switch modes
Release the brake pedal and press the power switch in above.
The hybrid system does not start and modes will be changed each time the
switch is pressed. ( P. 193)
■ If the doors cannot be locked o r unlocked by the smart key syst em
Lock and unlock the doors by the mechanical key or wireless rem ote control.
■ When the electronic key does not work properly
●Make sure that the smart key system has not been deactivated in the cus-
tomization setting. If it is off, turn the function on.
(Customizable features: P. 560)
● Check if battery-saving mode is set. If it is set, cancel the f unction.
( P. 142)
3
4
3
Page 530 of 600
5308-2. Steps to take in an emergency
PRIUS c_U
The coolant level is satisfac-
tory if it is between the
“FULL” and “LOW” lines on
the reservoir.Reservoir
“FULL” line
“LOW” line
Add coolant if necessary.
Water can be used in an emer-
gency if coolant is unavailable.
Start the hybrid system and turn the air conditioning system on to
check that the radiator cooling fan operates and to check for
coolant leaks from t he radiator or hoses.
The fan operates when the air conditioning system is turned on immedi-
ately after a cold start. Confirm that the fan is operating by checking the
fan sound and air flow. If it is difficult to check these, turn the air condi-
tioning system on and off repeatedly.
(The fan may not operate in freezing temperatures.)
If the fan is not operating:
Stop the hybrid system immediately and contact your Toyota
dealer.
If the fan is operating:
Have the vehicle inspected at the neare st Toyota dealer.
4
1
2
3
5
6
7
Page 531 of 600
5318-2. Steps to take in an emergency
8
When trouble arises
PRIUS c_U■
If the hybrid system overheat warning message is shown on
the multi-information display
Stop the vehicle in a safe place.
Stop the hybrid system and carefully lift the hood.
After the hybrid system has
cooled down, inspect the
hoses and radiator core
(radiator) for any leaks. Radiator
Cooling fan
If a large amount of coolant
leaks, immediately contact
your Toyota dealer.
The coolant level is satisfac-
tory if it is between the “F”
and “L” lines on the reservoir.
Reservoir
“F” line
“L” line
Add coolant if necessary.
Water can be used in an emer-
gency if coolant is unavailable.
Start the hybrid system and chec k for the multi-information dis-
play.
If the message d oes not disappear:
Stop the hybrid system and contact your Toyota dealer.
If the message is not displayed:
Have the vehicle inspected at the neare st Toyota dealer.
1
2
3
1
2
4
1
2
3
5
6
Page 532 of 600

5328-2. Steps to take in an emergency
PRIUS c_U
WARNING
■To prevent an accident or injury when inspecting under the hood of
your vehicle
● If steam is seen coming from under the hood, do not open the ho od until
the steam has subsided. The engine compartment may be very hot, caus-
ing serious injuries such as burns.
● After the hybrid system has been turned off, check that on the multi-
information display and the “READY” indicator are off.
When the hybrid system is operating, the gasoline engine may au tomati-
cally start, or the cooling fan may suddenly operate even if th e gasoline
engine stops. Do not touch or approach rotating parts such as t he fan,
which may lead to fingers or clothing (especially a tie, a scarf or a muffler)
getting caught, resulting in serious injury.
● Do not loosen the radiator cap while the hybrid system and radi ator are
hot.
Serious injuries, such as burns, may result from hot coolant an d steam
released under pressure.
NOTICE
■ When adding engine/power control unit coolant
Wait until the hybrid system has cooled down before adding engine/power
control unit coolant.
When adding coolant, do so slowly. Adding cool coolant to a hot hybrid sys-
tem too quickly can cause damage to the hybrid system.
■ To prevent damage to the cooling system
Observe the following precautions:
● Avoid contaminating the coolant with foreign matter (such as sa nd or dust
etc.).
● Do not use any coolant additive.
Page 533 of 600

5338-2. Steps to take in an emergency
8
When trouble arises
PRIUS c_U
Shift the shift lever to P and set the parking brake. Stop the hybrid
system.
Remove the mud, snow or sand from around the stuck tire.
Place wood, stones or some other material under the tires to help
provide traction.
Restart the hybrid system.
Shift the shift lever to the D or R position and carefully appl y the
accelerator to free the vehicle.
■ When it is difficult to free the vehicle
If the vehicle becomes stuck
Carry out the following procedures if the tires spin or the vehicle
becomes stuck in mud, dirt or snow:
Press to turn off TRAC.
WARNING
■When attempting to f ree a stuck vehicle
If you choose to push the vehicle back and forth to free it, ma ke sure the
surrounding area is clear to avoid striking other vehicles, obj ects or people.
The vehicle may also lunge forward or lunge back suddenly as it becomes
free. Use extreme caution.
■ When shifting the shift lever
Be careful not to shift the shift lever with the accelerator pedal depressed.
This may lead to unexpected rapid acceleration of the vehicle t hat may
cause an accident resulting in death or serious injury.
1
2
3
4
5