
2123-4. Adjusting the steering wheel and mirrors
PRIUS_OM_OM47E09U_(U)
Steering wheel
Hold  the  steering  wheel  and
push the lever down.
Adjust  to  the  ideal  position  by
moving the steering wheel hori-
zontally and vertically.
After  adjustment,  pull  the  lever  up
to secure the steering wheel.
To  sound  the  horn,  press  on  or
close to the   mark.
Adjustment procedure
1
2
Horn 

370
PRIUS_OM_OM47E09U_(U)
4-5. Using the driving support systems
WARNING
■Sensors
Certain  vehicle  conditions  and  the  surrounding  environment may  affect  the
ability of the sensor to correctly detect obstacles. Particular  instances where
this may occur are listed below.
● There  is  dirt,  snow  or  ice  on  the  sensor.  (Wiping  the  sensors  w ill  resolve
this problem.)
● The sensor is frozen. (Thawing the area will resolve this probl em.) 
In  especially  cold  weather,  if  a  sensor  is  frozen,  the  screen  m ay  show  an
abnormal display, or obstacles may not be detected.
● The sensor is covered in any way.
● In harsh sunlight or intense cold weather
● On an extremely bumpy road, on an incline, on gravel, or on grass
● The  vicinity  of  the  vehicle  is  noisy  due  to  vehicle  horns,  moto rcycle
engines, air brakes of large vehicles, or other loud noises pro ducing ultra-
sonic waves.
● The sensor is splashed with water or drenched with heavy rain.
● The sensor is drenched with water on a flooded road.
● The vehicle is leaning considerably to one side.
● The vehicle is equipped with a fender pole or wireless antenna.
● The vehicle is approaching a tall or curved curb.
● The area directly under the bumpers is not detected.
● If obstacles draw too close to the sensor.
● The bumper or sensor receives a strong impact.
● A non-genuine Toyota suspension (lowered suspension etc.) is in stalled.
● There is another vehicle equipped with parking assist sensors i n the vicin-
ity.
● Towing eyelets are installed.
● A backlit license plate is installed.
In addition to the examples above, depending on the shape and c ondition of
obstacles,  detection  may  not  be  possible,  or  the  detection  rang e  may  be
shortened. 

PRIUS_OM_OM47E09U_(U)
3814-5. Using the driving support systems
4
Driving
■Situations when the system may operate even though there is no  possi-
bility of a collision
In  the  following  situations,  the  system  may  operate  even  though   there  is  no
possibility of a collision.
● Environmental influence
• The vehicle is driven toward a banner or flag, a low-hanging branch or a
boom  barrier  (such  as  those  used  at  railroad  crossings,  toll  gates  and
parking lots).
• There  is  an  obstacle  on  the  shoulder  of  the  road  (when  the  veh icle  is
driven in a narrow tunnel, on a narrow bridge or on a narrow road)
• The vehicle is being parallel parked
• There is a rut or hole in the surface of the road
• When the vehicle is driven on a metal cover (grating), such as  those used
for drainage ditches
• The vehicle is driven on a steep slope
• The sensor is covered by water on a flooded road
● Influence from the weather
• Ice,  snow,  dirt,  etc.,  has  adhered  to  the  sensor  (if  removed,  the  system
returns to normal)
• Heavy rain or water strikes the vehicle
• In severe weather such as fog, snow or a sand storm
● Influence from other sonic waves
• An  ultrasonic  wave  source  is  nearby,  such  as  the  horn  or  parki ng  assist
sensors of another vehicle, a vehicle detector, a motorcycle en gine or the
air brake of a large vehicle
• Electronic  components  (such  as  a  backlit  license  plate  (especially  fluo-
rescent  types),  fog  lights,  a  fender  pole  or  a  wireless  antenna )  are
installed near the sensors
• The  vehicle  is  driven  on  a  narrow
road
• The vehicle is driven on a gravel road or in an area with tall grass 

PRIUS_OM_OM47E09U_(U)
3834-5. Using the driving support systems
4
Driving
●Influence from other sonic waves
• An  ultrasonic  wave  source  is  nearby,  such  as  the  horn  or  parki ng  assist
sensors of another vehicle, a vehicle detector, a motorcycle en gine or the
air brake of a large vehicle
• Electronic  components  (such  as  a  backlit  license  plate  (especially  fluo- rescent  types),  fog  lights,  a  fender  pole  or  a  wireless  antenna )  are
installed near the sensors
● Changes in the vehicle
• When driving with the shift position in N
• The vehicle is tilted a large amount
• The height of the vehicle has drastically changed due to the c arried load
(the nose tilts up or down)
• The direction of the sensor has deviated due to a collision or  other impact
■ Parking  Support  Brake  function  while  the  Simple  Advanced  Parkin g
Guidance System is operating
P. 388
■ When removing and instal ling the 12-volt battery
The system needs to be initialized.
The system can be initialized by driving the vehicle straight a head for 5 sec-
onds or more at a speed of approximately 22 mph (35 km/h) or hi gher.
■ When “PKSB Unavailable” is displayed on the multi-information display
and the PKSB OFF indicator flashes
●Ice, snow, dirt, etc., may have adhered to the sensor. If this  occurs, remove
the ice, snow, dirt, etc., from the sensor to return the system  to normal.
Also, a warning message may be displayed at  low temperatures du e to ice
forming  on  the  sensor,  and  the  sensor  may  not  detect  obstacles.  Once  the
ice melts, the system will return to normal.
● If this message is shown even after removing dirt from the sensor, or shown
when  the  sensor  was  not  dirty  to  begin  with,  have  the  vehicle  i nspected  at
your Toyota dealer.
● System initialization may not have been performed after removal and instal-
lation of the 12-volt battery. Perform system initialization. 
■ When  “PKSB  Malfunction  Visit  Your  Dealer”  is  displayed  on  the  m ulti-
information  display,  the  PKSB  OFF  indicator  flashes  and  the  buz zer
sounds
The  system  may  not  be  operating  properly.  Have  the  vehicle  inspected  at
your Toyota dealer. 

PRIUS_OM_OM47E09U_(U)
4194-5. Using the driving support systems
4
Driving
WARNING
●Observe  the  following  precautions,  as  the  sensors  may  stop  func tioning
properly which may lead to an accident.
• Do  not  subject  the  sensor  to  strong  shocks  by  hitting  it,  etc.   The  sen-
sors may not function properly.
• When  using  a  high-pressure  washer  to  wash  the  vehicle,  do  not  spray
water  directly  on  the  sensors.  Equipment  may  not  function  prope rly  if
subjected  to  an  impact  from  strong  water  pressure.  If  the  vehic le
bumper strikes  something, equipment may not operate properly  du e  to
a sensor malfunction. Have the vehicle inspected at your Toyota dealer.
● In the following situations, the sensors may not operate normally and may
lead to an accident. Drive carefully.
• Obstacles cannot be detected in the side areas until a scan of  the side
areas is completed. ( P. 368)
• Even  after  the  scan  of  the  side  areas  is  completed,  obstacles  such  as other  vehicles,  people  or  animals  that  approach  from  the  sides  cannot
be detected.
• The sensor is frozen (if it thaws, the system returns to norma l). 
A warning message may display at particularly low temperatures  due to
the sensor freezing and it may not detect parked vehicles.
• The sensor is blocked by someone’s hand.
• The vehicle is tilted a large amount.
• The temperature is extremely hot or cold.
• The vehicle is driven on undulating roads, slopes, gravel road s, in areas
with tall grass, etc.
• An  ultrasonic  wave  source  is  nearby,  such  as  the  horn  or  senso rs  of
another vehicle, a motorcycle engine or the air brake of a larg e vehicle.
• Heavy rain or a water strikes the vehicle.
• The  angle  of  the  sensor  may  be  deviated  when  assist  control  st arts
even  if  there  is  a  parked  vehicle  in  the  target  parking  spot.  Have  the
vehicle inspected at your Toyota dealer.
• Do not install any accessories within the sensor detection ran ge. 

645
PRIUS_OM_OM47E09U_(U)
7
When trouble arises
7-2. 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 no t be functioning properly.
* ( P. 647)
● There may not be sufficient f uel in the vehicle’s tank.
Refuel the vehicle. ( P. 90)
● There may be a malfunction  in the immobilizer system.
* ( P.   9 5 )
● There may be a malfunction i n the shift control system.
* 
(  P. 249, 609)
● The hybrid system may be malfunc tioning due to an electrical prob-
lem such as electronic key battery depletion or a blown fuse. H ow-
ever,  depending  on  the  type  of  malfunction,  an  interim  measure  is
available to start the hybrid system. ( P. 646)
● There  is  a  possibility  that  the  t emperature  of  the  hybrid  battery
(traction  battery)  is  extremely  low  (approximately  below  -22°F
[-30°C]). ( P. 90, 248)
*: 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. 650)
● The 12-volt battery terminal connections may be loose or corrod ed. 
(  P. 524)
Reasons  for  the  hybrid  system  not  starting  vary  depending  on
the  situation.  Check  the  followi ng  and  perform  the  appropriate
procedure: 
The hybrid system will not start  even though the correct starting
procedure is being followed. ( P. 245)
The  interior  lights  and  headlights  are  dim,  or  the  horn  does  no t
sound or sounds at a low volume. 

6467-2. Steps to take in an emergency
PRIUS_OM_OM47E09U_(U)
One of the following may be the cause of the problem:
● The 12-volt battery  may be discharged. ( P. 650)
● One  or  both  of  the  12-volt  battery  terminals  may  be  disconnecte d.
(  P. 524)
Contact  your  Toyota  dealer  if  the  problem  cannot  be  repaired,  o r  if  repair
procedures are unknown.
When  the  hybrid  system  does  not  start,  the  following  steps  can  be
used  as  an  interim  measure  to  sta rt the hybrid system if the power
switch is functioning normally. 
Do not use this starting procedur e except in cases of emergency.
Set the parking brake.
Turn the power switch to ACCESSORY mode.
Press  and  hold  the  power  switch  for  about  15  seconds  while
depressing the brake pedal firmly.
Even  if  the  hybrid  system  can  be  started  using  the  above  steps,  the
system  may  be  malfunctioning.  Hav e  the  vehicle  inspected  by  your
Toyota dealer.
The  interior  lights  and  headlights  do  not  turn  on,  or  the  horn
does not sound.
Emergency start function
1
2
3 

730Alphabetical index
PRIUS_OM_OM47E09U_(U)
Front turn signal lights ........... 261Replacing light bulbs............. 577
Turn signal lever ................... 261
Fuel ........................................... 675 Capacity ................................ 667
Fuel gauge ............................ 116
Information ............................ 675
Refueling............................... 283
Type ...................................... 667
Warning light ......................... 594
Fuel consumption............ 133, 170
Fuel filler door.......................... 283
Opener .................................. 285
Refueling............................... 283
When the fuel filler door cannot be opened............... 286
Fuses ........................................ 563
Garage door opener ................ 488
Glove box ................................. 462
Hands-free system (for 
cellular phone)
*
Head restraints ........................ 209
Head-up display ....................... 158
Headlights ................................ 263 AHB (Automatic High Beam) ................................. 268
Headlight aim ................ 566, 716
Light switch ........................... 263
Replacing light bulbs............. 577
Heated steering wheel............. 456
Heaters Automatic air conditioning 
system ....... ................. 436, 446
Heated steering wheel .......... 456
Outside rear view mirrors ........................ 440, 450
Seat heaters ......................... 456 High coolant temperature 
warning light.......................... 594
High mounted stoplight Replacing.............................. 577
High-voltage components ........ 88
Hill-start assist control ........... 421
Hood ......................................... 515
Hooks
Cargo hooks ......................... 468
Coat hooks ........................... 486
Grocery bag hook ................. 469
Retaining hooks (floor mat) .... 26
Horn .......................................... 212
Hybrid battery (tr action battery)
Air intake vent ......................... 89
Location .................................. 88
Specification ......................... 667
Hybrid battery (traction  battery) air intake vent............ 89 Cleaning ............................... 551
Hybrid system............................ 84 Brake Override System ........ 229 
Drive-Start Control ................ 230 
Emergency shut off system .... 89
Energy monitor/consumption 
screen ................ 127, 165, 172
EV drive mode ...................... 252
High voltage components ....... 88
Hybrid System Indicator ....... 129
Hybrid system precautions ..... 88
Hybrid vehicle driving tips ..... 427
If the hybrid system will not  start .................................... 645
Overheating .......................... 656
Power switch ........................ 245
Regenerative braking ............. 86
Starting the hybrid system .... 245
Vehicle proximity notification  system .......... ..................... ... 85
Hybrid System Indicator ......... 129
Hybrid transmission................ 255
G
H