
2264-5. Toyota Safety Sense C
PRIUS c_U
WARNING
■To avoid malfunction of the front sensor
Observe the following precautions.
Otherwise, the front sensor may not operate properly, possibly  leading to an
accident resulting in death or serious injury.
● Keep the windshield clean at all times. If the windshield is di rty or covered
with  an  oily  film,  water  droplets,  snow,  etc.,  clear  the  windshield.  If  the
inner side of the windshield in front of the front sensor is dirty, contact your
Toyota dealer.
● If there is a large difference in temperature between the inside and outside
of the vehicle, such as in winter, the windshield is likely to  fog up easily. If
the  part  of  the  windshield  in  front  of  the  front  sensor  is  fogg ed  up  or  cov-
ered  with  condensation  or  ice,  the  PCS  warning  light  may  illumi nate  and
the  system  may  be  temporarily  disabled.  In  this  case,  use  the  w indshield
defogger to remove the fog, etc. ( P. 376)
● If  the  area  of  the  windshield  in  front  of  the  front  sensor  is  covered  with
water droplets, use the windshield wipers to remove them. 
If  the  water  droplets  are  not  sufficiently  removed,  the  performance  of  the
front sensor may be reduced.
●Do  not attach objects,  such as  stickers,
transparent  stickers,  etc.,  and  so  forth,
to  the  outer  side  of  the  windshield  in
front of the front sensor (shaded area in
the illustration).
A:  From  the  top  of  the  windshield  to
approximately 4.0 in. (10 cm) below the
bottom of the front sensor
B:  Approximately  7.9  in.  (20  cm)
(Approximately  4.0  in.  (10  cm)  to  the
right and left from the center of the front
sensor)
● Do  not  install  or  attach  anything  to  the
inner  side  of  the  windshield  under  the
front sensor (shaded area in the illustra-
tion).
A: Approximately  4.0  in.  (10  cm)  (Start-
ing from the bottom of the front sensor)
B:  Approximately  7.9  in.  (20  cm)
(Approximately  4.0  in.  (10  cm)  to  the
right and left from the center of the front
sensor) 

2274-5. Toyota Safety Sense C
4
Driving
PRIUS c_U
WARNING
●If  water  droplets  cannot  be  properly  removed  from  the  area  of  t he  wind-
shield  in  front  of  the  front  sensor  by  the  windshield  wipers,  r eplace  the
wiper insert or wiper blade. 
If  the  wiper  inserts  or  wiper  blades  need  to  be  replaced,  contact  your
Toyota dealer.
● Do not attach window tint to the windshield.
● Replace the windshield if it is damaged or cracked. 
If the windshield needs to be replaced, contact your Toyota dea ler.
● Do not get the front sensor wet.
● Do not allow bright lights to shine into the front sensor.
● Do not dirty or damage the front sensor. 
When  cleaning  the  inside  of  the  windshield,  do  not  allow  glass  cleaner  to
contact the lens. Also, do not touch the lens. 
If the lens is dirty or damaged, contact your Toyota dealer.
● Do not subject the front sensor to a strong impact.
● Do  not  change  the  installation  position  or  direction  of  the  fro nt  sensor  or
remove it.
● Do not disassemble the front sensor.
● Do  not  modify  any  components  of  the  vehicle  around  the  front  sensor
(inside rear view mirror, etc.) or ceiling.
● Do  not  attach  any  accessories  that  may  obstruct  the  front  senso r  to  the
hood, front grille or front bumper. Contact your Toyota dealer  for details.
● If a surfboard or other long object is to be mounted on the roo f, make sure
that it will not obstruct the front sensor.
● Do not modify the headlights or other lights.
● Do not attach anything to or place anything on the dashboard.
■ Installation area of front sensor on windshield
When the windshield is fogging up easily, the glass around the  front sensor
may be hot due to the heater running. If the glass is touched,  it may result in
burns. 

2284-5. Toyota Safety Sense C
PRIUS c_U
■If a warning message is displayed on the multi-information disp lay
A  system  may  be  temporarily  unavailable  or  there  may  be  a  malfu nction  in
the system.
● In  the  following  situations,  perform  the  actions  specified  in  t he  table.  When
the normal operating conditions are detected, the warning messa ge will dis-
appear and the system will become operational.
If the warning message does not disappear, contact your Toyota dealer.
● If the warning message does not disappear even after the normal  operating
conditions  have  returned  and  the  vehicle  has  been  driven  for  so me  time,
contact your Toyota dealer.
SituationActions
When the area around the front
sensor  is  covered  with  dirt,
moisture  (fogged  up,  covered
with  condensation,  ice,  etc.),  or
other foreign matterTo clean the part of the windshield in front
of  the  front  sensor,  use  the  windshield
wipers or the windshield defogger 
( P. 376).
When  the  temperature  around
the  front  sensor  is  outside  of
the  operational  range,  such  as
when the vehicle is in the sun or
in  an  extremely  cold  environ-
ment
If the front sensor is hot, such as after the
vehicle  is  parked  in  the  sun,  use  the  air
conditioning system to decrease the tem-
perature around the front sensor.
If a sunshade was used when the vehi-
cle  was  parked,  depending  on  its  type,
the  sunlight  reflected  from  the  surface
of  the  sunshade  may  cause  the  tem-
perature  of  the  front  sensor  to  become
excessively high.
If  the  front  sensor  is  cold,  such  after  the
vehicle  is  parked  in  an  extremely  cold
environment,  use  the  air  conditioning
system  to  increase  the  temperature
around the front sensor.
The  area  in  front  of  the  front
sensor  is  obstructed,  such  as
when  the  hood  is  open  or  a
sticker is attached to the part of
the  windshield  in  front  of  the
front sensor.
Close  the  hood,  remove  the  sticker,  etc.
to clear the obstruction. 

4127-2. Maintenance
PRIUS c_U
Vehicle exterior
ItemsCheck points
Doors• Do the doors operate smoothly?
Engine hood• Does the engine hood lock system work prop-erly?
Fluid leaks• There should not be any signs of fluid leakageafter the vehicle has been parked.
Tires
• Is the tire inflati on pressure correct?
• The tires should not be damaged or exces- sively worn.
• Have the tires been rotated according to the
maintenance schedule?
• The wheel nuts should not be loose.
Windshield  wipers/rear
window  wiper  (if
equipped)
• The  wiper  blades  should  not  show  any  signs
of  cracking,  splitting,  wear,  contamination  or
deformation.
• The wiper blades should clear the windshield/
rear window without streaking or skipping.
WARNING
■If the hybrid system is operating
Turn  the  hybrid  system  off  and  ensure  that  there  is  adequate  ve ntilation
before performing maintenance checks. 

595Alphabetical index
PRIUS c_U
Warning buzzersBrake system ....... ................. 477
Electric power steering  system ......... ....................... 478
Key reminder ........................ 496
LDA 
(Lane Departure Alert)........ 239
Master warning ..................... 479
Pre-Collision warning ............ 479
Seat belt reminder ................ 479
Warning lights
Anti-lock brake system.......... 478
Brake assist system .............. 478
Brake system ....... ................. 477
Electric power steering  system ......... ....................... 478
Front passenger occupant 
classification system........... 478
Low brake fluid...................... 477
Low fuel level ........................ 479
Low tire inflation pressure ..... 480
Malfunction indicator lamp .... 478
Master warning light.............. 479
Parking brake........................ 478
PCS warning light ................. 479
Pretensioners........................ 478
Seat belt reminder light ......... 479
Slip indicator light.................. 479
SRS airbag system ............... 478
Tire pressure......................... 480
Tire pressure warning  system ......... ....................... 480 Warning messages.................. 485
Washer
Checking............................... 428
Preparing and checking before winter ...................... 272
Switch ........................... 212, 216
Washing and waxing ............... 398
Weight Cargo capacity...................... 183
Load limits ............................ 183
Weight .................................. 534
Wheels ...................................... 445
Window lock switch ................ 161
Windows Power windows..................... 161
Rear window defogger.......... 376
Washer ......................... 212, 216
Windshield wipers ................... 212
Wireless remote control key Replacing the key battery ..... 449
Wireless remote control ........ 119
WMA disc ................................. 298
W