Page 252 of 600
2524-6. Using the driving support systems
PRIUS c_U
To change the set speed, operate the lever until the desired se t speed
is obtained.
Increases the speed
Decreases the speed
Fine  adjustment:  Momentarily
move the lever in the desired direc-
tion.
Large adjustment: Hold the lever in
the desired direction.
The set speed will be increased or decreased as follows:
Fine adjustment: By approximately 1 mph (1.6 km/h) each time th e lever is
operated.
Large adjustment: The set speed can be increased or decreased c ontinu-
ally until the lever is released.
Pulling  the  lever  toward  you
cancels  the  c onstant  speed
control.
The speed setting is also canceled
when the brakes are applied.
Pushing  the  lever  up  resumes
the constant  speed control.
Resuming  is  available  when  the
vehicle speed is more than approx-
imately 25 mph (40 km/h).
Adjusting the set speed
1
2
Canceling and resuming t he constant speed control
1
2 
         
        
        
     
        
        Page 254 of 600
2544-6. Using the driving support systems
PRIUS c_U
WARNING
■To avoid operating the cruise control by mistake
Switch the cruise control off using the “ON-OFF” button when not in use.
■ Situations unsuitable for cruise control
Do not use cruise control in any of the following situations.
Doing so may result in loss of control and could cause an accid ent resulting
in death or serious injury.
● In heavy traffic
● On roads with sharp bends
● On winding roads
● On slippery roads, such as those covered with rain, ice or snow
● On steep hills
Vehicle speed may exceed the set speed when driving down a stee p hill.
● During emergency towing 
         
        
        
     
        
        Page 371 of 600

3715-12. Using the voice command system (Multimedia system)
5
Audio system
PRIUS c_U
■Microphone
P. 333
■ When using the microphone
●It is unnecessary to speak directly into the microphone when gi ving a com-
mand.
● When  “Voice  Prompt  Interrupt”  set  to  on,  it  is  not  necessary  to   wait  for  the
confirmation beep before speaking a command. ( P. 293)
● Voice commands may not be recognized if:
• Spoken too quickly.
• Spoken at a low or high volume.
• The roof or windows are open.
• Passengers are talking while voice commands are spoken.
• The air conditioning speed is set high.
• The air conditioning vents are turned towards the microphone.
● In  the  following  conditions,  the  system  may  not  recognize  the  command
properly and using voice commands may not be possible:
• The command is incorrect or unclear. Note that certain words,  accents or
speech patterns may be difficult for the system to recognize.
• There is excessive background noise, such as wind noise.
Due  to  natural  language  speech  recognition  technology,  this  sys tem
enables  recognition  of  a  command  when  spoken  naturally.  However ,
the system cannot recognize ever y variation of each command.
In  some  situations,  it  is  possi ble  to  omit  the  command  for  the  proce-
dure and directly state the desired operation.
Not all voice commands are displayed in the short cut menu.
This function is available in  English, Spanish and French.
■Expression examples for each function
Casual speech recognization
CommandExpression examples
“Call  (name)
(type)”Get me (Robert Brown).
I need to call (Robert Brown) at (Work) right away.
“Dial (number)”Please dial the number (3334445555).
Ring (3334445555). 
         
        
        
     
        
        Page 392 of 600
3926-3. Using the storage features
PRIUS c_U
■When using the bottle holder
●When storing a bottle, close the cap.
● The bottle may not be stored depending on its size or shape.
Bottle holders
WARNING
Do not place anything other than a bottle in the bottle holders . 
Items in the bottle holders may be thrown out of the holders in the event of
an accident or sudden braking and cause injury.
NOTICE
Put the cap on before stowing a bottle. Do not place open bottl es in the bot-
tle  holders, or glasses and paper cups  containing liquid. The  c ontents may
spill and glasses may break. 
         
        
        
     
        
        Page 416 of 600

416
PRIUS c_U
7-3. 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.
ItemsCheck points
12-volt battery condition  (P. 431) • Grease
• Conventional wrench 
(for terminal clamp bolts)
Brake fluid level
(P. 428)
• FMVSS  No.116  DOT  3  or  SAE  J1703  brake
fluid
• Rag or paper towel
• Funnel (used only for adding brake fluid)
Engine/power  control
unit coolant level (P. 426)
• “Toyota  Super  Long  Life  Coolant”  or  a  similar
high  quality  ethylene  glycol  based  non-sili-
cate,  non-amine,  non-nitrite  and  non-borate
coolant with long-life hybrid organic acid tech-
nology
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. 423)• “Toyota Genuine Motor Oil” or equivalent
• Rag or paper towel
• Funnel (used only for adding engine oil)
Fuses ( P. 454)• Fuse with same amperage rating as original
Light bulbs (P. 458)
• Bulb with same number and wattage rating as
original
• Phillips-head screwdriver
• Flathead screwdriver
• Wrench
Radiator and condenser
(P. 428)
Tire inflation pressure
( P. 444)• Tire pressure gauge
• Compressed air source 
         
        
        
     
        
        Page 442 of 600

4427-3. Do-it-yourself maintenance
PRIUS c_U
WARNING
■When inspecting or replacing tires
Observe the following precautions to prevent accidents. 
Failure to do so may cause damage  to parts of the drive train as well as
dangerous  handling  characteristics,  which  may  lead  to  an  accide nt
resulting in death o r serious injury.
●Do not mix tires of different ma kes, models or tread patterns. 
Also, do not mix tires of re markably different treadwear.
●Do not use tire sizes other th an those recommended by Toyota.
●Do  not  mix  differently  constructed  tires  (radial,  bias-belted  o r  bias-ply
tires).
●Do not mix summer, all  season and snow tires.
●Do not use tires that have b een used on another vehicle. 
Do not use tires if you do not kn ow how they were used previous ly. 
●Do not tow if your vehicle has a compact spare tire installed.
■When initializing the tire pressure warning system
Do  not  operate  the  tire  pressure  warning  reset  switch  without  first
adjusting the tire inflation pressure to the specified level. O therwise, the
tire  pressure  warning  light  may  not  come  on  even  if  the  tire  in flation
pressure  is  low,  or  it  may  come  on  when  the  tire  inflation  pres sure  is
actually normal. 
         
        
        
     
        
        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 472 of 600
472
PRIUS c_U
8-2. Steps to take in an emergency
The following may indicate a problem with your transmission. Contact
your Toyota dealer or commercial  towing service before towing.
● A  warning  message  for  the  hybrid  system  is  shown  on  the  multi-
information display and the vehicle does not move.
● The vehicle makes an abnormal sound.
If  your vehicle needs to be towed
If  towing  is  necessary,  we  recommend  having  your  vehicle
towed  by  your  Toyota  dealer  o r  commercial  towing  service,
using a wheel-lift type t ruck or flatbed truck.
Use  a  safety  chain  system  for  all  towing,  and  abide  by  all  stat e/
provincial and local laws.
Situations when it is necessary to contact dealers before towing