sensor TOYOTA AVALON HYBRID 2020 (in English) Owner's Manual
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2444-5. Using the driving support systems
WARNING
■When to disable the pre-collision system
In  the  following  situations,  disable  the  system,  as  it  may  not  operate  prop-
erly, possibly leading to an accident resulting in death or ser ious injury:
● When the vehicle is being towed
● When your vehicle is towing another vehicle
● When  transporting  the  vehicle  via  truck,  boat,  train  or  similar   means  of
transportation
● When the vehicle is raised on a lift with the hybrid system on  and the tires
are allowed to rotate freely
● When inspecting the vehicle using a drum tester such as a chass is dyna-
mometer  or  speedometer  tester,  or  when  using  an  on  vehicle  whee l  bal-
ancer
● When a strong impact is applied to the front bumper or front gr ille, due to
an accident or other reasons
● If the vehicle cannot be driven in a stable manner, such as when the vehi-
cle has been in an accident or is malfunctioning
● When the vehicle is driven in a sporty manner or off-road
● When the tires are not properly inflated
● When the tires are very worn
● When tires of a size other than specified are installed
● When tire chains are installed
● When a compact spare tire or an emergency tire puncture repair  kit is used
● If equipment (snow plow, etc.) that may obstruct the radar sens or or cam-
era sensor is temporarily installed to the vehicle 
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Driving
■Situations in which the syst em may not operate properly
● In  some  situations  such  as  the  following,  a  vehicle  may  not  be  detected  by
the radar sensor and camera sensor, preventing the system from  operating
properly:
• If an oncoming vehicle is approaching your vehicle
• If a vehicle ahead is a motorcycle or bicycle
• When approaching the side or front of a vehicle
• If a preceding vehicle has a small rear end, such as an unload ed truck
• If a vehicle ahead is carrying a load which protrudes past its rear bumper
• If a vehicle ahead is irregularly shaped, such as a tractor or side car
• If the sun or other light is shining directly on a vehicle ahe ad
• If a vehicle cuts in front of your vehicle or emerges from bes ide a vehicle
• If a vehicle ahead makes an abrupt maneuver (such as sudden sw erving,
acceleration or deceleration)
• When suddenly cutting behind a preceding vehicle
• When  driving  in  inclement  weather  such  as  heavy  rain,  fog,  snow  or  a
sandstorm
• When the vehicle is hit by water, snow, dust, etc. from a vehicle ahead
• When driving through steam or smoke
• When driving in  a place where the  surrounding brightness changes  sud- denly, such as at the entrance or exit of a tunnel
• If  a  preceding  vehicle  has  a  low  rear
end, such as a low bed trailer
• If a vehicle ahead has extremely high ground clearance
• When  a  vehicle  ahead  is  not  directly in front of your vehicle 
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2504-5. Using the driving support systems
• When  a  very  bright  light,  such  as  the  sun  or  the  headlights  of  oncoming
traffic, shines directly into the camera sensor
• When  the  surrounding  area  is  dim,  such  as  at  dawn  or  dusk,  or  while  at
night or in a tunnel
• After the hybrid system has started the vehicle has not been d riven for a
certain amount of time
• While  making  a  left/right  turn  and  for  a  few  seconds  after  mak ing  a  left/
right turn
• While driving on a curve and for a few seconds after driving o n a curve
• If your vehicle is skidding
• If the wheels are misaligned
• If a wiper blade is blocking the camera sensor
• The vehicle is wobbling.
• The vehicle is being driven at extremely high speeds.
• When driving on a hill 
• If the radar sensor or camera sensor is misaligned
● In some situations such as the following, sufficient braking fo rce may not be
obtained, preventing the system from performing properly:
• If  the  braking  functions  cannot  operate  to  their  full  extent,  such  as  when
the brake parts are extremely cold, extremely hot, or wet
• If  the  vehicle  is  not  properly  maintained  (brakes  or  tires  are   excessively
worn, improper tire inflation pressure, etc.)
• When  the  vehicle  is  being  driven  on  a  gravel  road  or  other  sli ppery  sur-
face
• If  the  front  of  the  vehicle  is  raised  or
lowered 
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Driving
●Some  pedestrians  such  as  the  following  may  not  be  detected  by  t he  radar
sensor and camera sensor, preventing the system from operating  properly:
• Pedestrians shorter than approximately 3.2 ft. (1 m) or taller  than approx-
imately 6.5 ft. (2 m)
• Pedestrians wearing oversized clothing (a rain coat, long skir t, etc.), mak-
ing their silhouette obscure
• Pedestrians  who  are  carrying  large  baggage,  holding  an  umbrell a,  etc.,
hiding part of their body
• Pedestrians who are bending forward or squatting
• Pedestrians who are pushing a stroller, wheelchair, bicycle or  other vehi-
cle
• Groups of pedestrians which are close together
• Pedestrians who are wearing white and look extremely bright
• Pedestrians in the dark, such as at night or while in a tunnel
• Pedestrians  whose  clothing  appears  to  be  nearly  the  same  color  or
brightness as their surroundings
• Pedestrians near walls, fences, guardrails, or large objects
• Pedestrians who  are  on a  metal  object (manhole cover,  steel plate,  etc.) on the road
• Pedestrians who are walking fast
• Pedestrians who are changing speed abruptly
• Pedestrians running out from beh ind a vehicle or a large object
• Pedestrians  who  are  extremely  close  to  the  side  of  the  vehicle  (outside
rear view mirror, etc.)
■ If the PCS warning light flashes or illuminates and a warning m essage is
displayed on the multi-information display
The  pre-collision  system  may  be  temporarily  unavailable  or  there  may  be  a
malfunction in the system.
● In  the  following  situations,  the  warning  light  will  turn  off,  t he  message  will
disappear  and  the  system  will  become  operational  when  normal  op erating
conditions return:
• When the radar sensor or camera sensor or the area around eith er sen-
sor is hot, such as in the sun
• When the radar sensor or camera sensor or the area around eith er sen-
sor is cold, such as in an extremely cold environment
• When a front sensor is dirty or covered with snow, etc.
• When  the  part  of  the  windshield  in  front  of  the  camera  sensor  is  fogged
up or covered with condensation or ice 
(Defogging the windshield: 
P. 343)
• If  the  camera  sensor  is  obstructed,  such  as  when  the  hood  is  open  or  a sticker is attached to the windshield near the camera sensor
● If  the  PCS  warning  light  continues  to  flash  or  remains  illuminated  or  the
warning message does not disappear even though the vehicle has  returned
to normal, the system may be malfunctioning. Have the vehicle inspected by
your Toyota dealer immediately. 
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Driving
When driving on highways and freeways with white (yellow) lines, this
function  alerts  the  driver  when  the  vehicle  might  depart  from  i ts  lane
and  provides  assistance  by  opera ting  the  steering  wheel  to  keep the
vehicle in its lane.
The  LDA  system  recognizes  visi-
ble  white  (yellow)  lines  with  the
camera  sensor  on  the  upper  por-
tion of the windshield.
LDA (Lane Depar ture Al ert with steering 
control)
Summary of functions 
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■Conditions in which function s may not operate properly
In  the  following  situations,  the  camera  sensor  may  not  detect  w hite  (yellow)
lines and various functions may not operate normally.
● There  are  shadows  on  the  road  that  run  parallel  with,  or  cover,   the  white
(yellow) lines.
● The vehicle is driven in an area without white (yellow) lines,  such as in front
of a tollgate or checkpoint, or at an intersection, etc.
● The  white  (yellow)  lines  are  cracked,  “Botts’  dots”,  “Raised  pa vement
marker” or stones are present.
● The  white  (yellow)  lines  cannot  be  seen  or  are  difficult  to  see   due  to  sand,
etc.
● The vehicle is driven on a road surface that is wet due to rain , puddles, etc.
● The  traffic  lines  are  yellow  (which  may  be  more  difficult  to  re cognize  than
lines that are white).
● The white (yellow) lines cross over a curb, etc.
● The vehicle is driven on a bright surface, such as concrete.
● The vehicle is driven on a surface that is bright due to reflec ted light, etc.
● The  vehicle  is  driven  in  an  area  where  the  brightness  changes  s uddenly,
such as at the entrances and exits of tunnels, etc.
● Light  from  the  headlights  of  an  oncoming  vehicle,  the  sun,  etc.   enters  the
camera.
● The vehicle is driven where the road diverges, merges, etc.
● The vehicle is driven on a slope.
● The vehicle is driven on a road which tilts left or right, or a  winding road.
● The vehicle is driven on an unpaved or rough road.
● The vehicle is driven around a sharp curve.
● The traffic lane is excessively narrow or wide.
● The  vehicle  is  extremely  tilted  due  to  carrying  heavy  luggage  or  having
improper tire pressure.
● The distance to the preceding vehicle is extremely short.
● The  vehicle  is  moving  up  and  down  a  large  amount  due  to  road  co nditions
during driving (poor roads or road seams).
● The headlight lenses are dirty and emit a faint amount of light at night, or the
beam axis has deviated.
● The vehicle is struck by a crosswind.
● The vehicle has just changed lanes or crossed an intersection.
● Snow tires, etc. are equipped. 
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Driving
■Warning message
If the following warning message is displayed on the multi-info rmation display
and  the  LDA  indicator  illuminates  in  amber,  follow  the  appropri ate  trouble-
shooting procedure.
If  a  different  warning  message  is  displayed,  follow  the  instructions  displayed
on the screen. ( P. 467)
■ Customization
Some functions can be customized. ( P.   1 1 1 )
Warning messageDetails/Actions
“LDA Malfunction 
Visit Your Dealer”
The  system  may  not  be  operating
properly.
 Have  the  vehicle  inspected  at  your
Toyota dealer.
“Front Camera Unavailable”
The  operation  conditions  of  the  cam-
era  sensor  (temperature,  etc.)  are  not
met.
When  the  operation  conditions  of
the  camera  sensor  (temperature,
etc.)  are  met,  the  LDA  system  will
become  available.  Turn  the  LDA
system  off,  wait  for  a  little  while,
and  then turn  the LDA system back
on.
“LDA Unavailable”
The  LDA  system  is  temporarily  can-
celed due to a malfunction in a sensor
other than the camera sensor.
Turn  the  LDA  system  off  and  follow
the  appropriate  troubleshooting
procedures  for  the  warning  mes-
sage.  Afterward,  drive  the  vehicle
for  a  short  time,  and  then  turn  the
LDA system back on.
“LDA Unavailable Below 
Approx. 32MPH”
The  LDA  system  cannot  be  used  as
the vehicle speed is less than approxi-
mately 32 mph (50 km/h).
Drive  the  vehicle  at  approximately
32 mph (50 km/h) or more. 
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Driving
WARNING
■Before using dynamic radar cruise control with full-speed range
● Driving  safely  is  the  sole  responsibility  of  the  driver.  Do  not  rely  solely  on
the system, and drive safely by always paying careful attention  to your sur-
roundings.
● The  dynamic  radar  cruise  control  with  full-speed  range  provides  driving
assistance to reduce the driver's burden. However, there are li mitations to
the assistance provided.
Read the following conditions carefully. Do  not overly rely on  this  system
and always drive carefully.
• When the sensor may not be correctly detecting the vehicle ahe ad: 
P. 275
• Conditions  under  which  the  vehicle-to-vehicle  distance  control   mode
may not function correctly:  P. 276
● Set the speed appropriately depending on the speed limit, traff ic flow, road
conditions, weather conditions, etc. The driver is responsible  for checking
the set speed.
● Even when the system is functioning normally, the condition of  the preced-
ing  vehicle  as  detected  by  the  system  may  differ  from  the  condition
observed  by  the  driver.  Therefore,  the  driver  must  always  remai n  alert,
assess  the danger of  each situation  and  drive safely. Relying  on this  sys-
tem  or  assuming  the  system  ensures  safety  while  driving  can  lea d  to  an
accident, resulting in death or serious injury.
● Switch the dynamic radar cruise control with full-speed range o ff using the
cruise control main switch when not in use.
■ Cautions regarding the driving assist systems
Observe the following precautions, as there are limitations to  the assistance
provided by the system.
Failure to do so may cause an accident resulting in death or se rious injury.
● Assisting the driver to measure following distance
The dynamic radar cruise control with full-speed range is only  intended to
help  the  driver  in  determining  the  following  distance  between  the  driver’s
own  vehicle  and  a  designated  vehicle  traveling  ahead.  It  is  not  a  mecha-
nism that allows careless or inattentive driving, and it is not  a system that
can  assist  the  driver  in  low-visibility  conditions.  It  is  still   necessary  for
driver to pay close attention to the vehicle’s surroundings.
● Assisting the driver to judge proper following distance
The  dynamic  radar  cruise  control  with  full-speed  range  determines
whether  the  following  distance  between  the  driver’s  own  vehicle   and  a
designated  vehicle  traveling  ahead  is  within  a  set  range.  It  is  not  capable
of  making  any  other  type  of  judgement.  Therefore,  it  is  absolutely  neces-
sary for the driver to remain vigilant and to determine whether  or not there
is a possibility of danger in any given situation. 
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WARNING
●Assisting the driver to operate the vehicle
The dynamic radar cruise control with full-speed range has limited capabil-
ity to prevent or avoid a collision with a vehicle traveling ah ead. Therefore,
if there is ever any danger, the driver must take immediate and direct con-
trol of the vehicle and act appropriately in order to ensure th e safety of all
involved.
■ Situations  unsuitable  for  dynamic  radar  cruise  control  with  ful l-speed
range
Do not use dynamic radar cruise control with full-speed range in any of the
following situations.
Doing so may result in inappropriate speed control and could ca use an acci-
dent resulting in death or serious injury.
● Roads where there are pedestrians, cyclists, etc.
● 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 downhills, or where there are sudden changes between s harp up
and down gradients 
Vehicle speed may exceed the set speed when driving down a stee p hill.
● At entrances to freeways and highways
● When weather conditions are bad enough that they may prevent the sen-
sors from detecting correctly (fog, snow, sandstorm, heavy rain, etc.)
● When  there  is  rain,  snow,  etc.  on  the  front  surface  of  the  radar  sensor  or
camera sensor
● In traffic conditions that require frequent repeated acceleration and decel-
eration
● When an approach warning buzzer is heard often 
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Driving
This mode employs a radar sensor to detect the presence of vehicles
up  to  approximately  328  ft.  (100  m)  ahead,  determines  the  curre nt
vehicle-to-vehicle following distance, and operates to maintain  a suit-
able following distance from the vehicle ahead.
Note that vehicle-to-vehicle distance will close in when travel ing on down-
hill slopes.
Example of constant speed cruising
When there are no  vehicles ahead
The  vehicle  travels  at  the  speed  set  by  the  driver. The  desired  vehicle-to-
vehicle  distance  can  also  be  set  by  operating  the  vehicle-to-ve hicle  dis-
tance switch.
Example of deceleration crui sing and follow-up cruising
When  a  preceding  vehicle  driving  slower  than  the  set  speed
appears
When a vehicle is detected running ahead of you, the system automatically
decelerates  your  vehicle.  When  a  greater  reduction  in  vehicle  s peed  is
necessary,  the  system  applies  the  brakes  (the  stop  lights  will  come  on  at
this time). The system will respond to changes in the speed of  the vehicle
ahead in order to maintain the vehicle-to-vehicle distance set by the driver.
Approach  warning  warns  you  when  the  system  cannot  decelerate  su ffi-
ciently to prevent your vehicle from closing in on the vehicle  ahead.
When the vehicle ahead of you stops, your vehicle will also stop (vehicle is
stopped by system control). After the vehicle ahead starts off, pressing the
“+  RES”  switch  or  depressing  the   accelerator  pedal  will  resume follow-up
cruising.
Driving in vehicle-to-vehi cle distance control mode
1
2