TOYOTA AVALON 2021 Owners Manual (in English)
Page 241 of 548
2414-5. Using the driving support systems
4
Driving
Press  the  LDA  switch  to  turn  the
LDA system on.
The  LDA  indicator  illuminates  and
a  message  is  displayed  on  the
multi-information display.
Press the LDA switch again to turn
the LDA system off.
When the LDA system is turned on
or off, operation of the LDA system
continues  in  the  same  condition
the next time the engine is started.
Turning LDA system on 
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2424-5. Using the driving support systems
The  illustration  used  is  intended  as  an  example,  and  may  differ from
the image that is actually displayed on the multi-information display.
LDA indicator
The illumination condition of the
indicator  informs  the  driver  of
the system operation status.
Illuminated in white: 
LDA system is operating.
Illuminated in green: 
Steering  wheel  assistance  of  the
steering  control  function  is  operat-
ing.
Flashing in amber: 
Lane  departure  alert  function  is
operating.
Operation display of steering wheel operation support
Indicates  that  steering  wheel  assistance  of  the  steering  control
function is operating.
Lane departure alert function display
Displayed  when  the  multi-information  display  is  switched  to  the
driving assist system information screen.
Indications on multi-information display
1
2
3
Inside  of  displayed  white  lines
is whiteInside  of  displayed  white  lines
is black
Indicates that the system is recog-
nizing  white  (yellow)  lines.  When
the  vehicle  departs  from  its  lane,
the  white  line  displayed  on  the
side  the  vehicle  departs  from
flashes yellow.Indicates  that  the  system  is  not
able  to  recognize  white  (yellow)
lines or is temporarily canceled. 
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2434-5. Using the driving support systems
4
Driving
■Operation conditions of each function
●Lane departure alert function
This function operates when all of the following conditions are met.
• LDA is turned on.
• Vehicle speed is approximately 32 mph (50 km/h) or more.
• System recognizes white (yellow) lines.
• Width of traffic lane is approximately 9.8 ft. (3 m) or more.
• Turn signal lever is not operated.
• Vehicle is driven on a straight road or around a gentle curve with a radius
of more than approximately 492 ft. (150 m).
• No system malfunctions are detected. (P. 246)
●Steering control function
This function operates when all of the following conditions are met in addi-
tion to the operation conditions for the lane departure alert function.
• Setting for “Steering Assist” in   of the multi-information display is set to
“On”. (P. 100)
• Vehicle is not accelerated or decelerated by a certain amount or more.
• Steering  wheel  is  not  operated  with  a  steering  force  level  suitable  for
changing lanes.
• ABS, VSC, TRAC and PCS are not operating.
• TRAC or VSC is not turned off.
• Hands off steering wheel warning is not displayed. (P.   2 4 4 )
●Vehicle sway warning function
This function operates when all of the following conditions are met.
• Setting for “Sway Warning” in   of the multi-information display is set to
“On”. (P. 100)
• Vehicle speed is approximately 32 mph (50 km/h) or more.
• Width of traffic lane is approximately 9.8 ft. (3 m) or more.
• No system malfunctions are detected. (P. 246) 
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2444-5. Using the driving support systems
■Temporary cancellation of functions
When  the  operation  conditions  are  no  longer  met, a  function  may be  tempo-
rarily canceled. However, when the operation conditions are met again, oper-
ation of the function is automatically restored. (P. 243)
■Steering control function
Depending  on  the  vehicle  speed,  lane  departure  situation,  road conditions,
etc., the  driver may not feel  the  function is operating or the function may not
operate at all.
■Lane departure alert function
The warning buzzer may be difficult to hear due to external noise, audio play-
back, etc.
■Hands off steering wheel warning
If the driver continues to keep their hands off of the steering wheel, a warning
message and the symbol shown in the illustration are displayed on the multi-
information display, and the function is temporarily canceled.
This  warning  also  operates  in  the  same  way  when  the  driver  continuously
operates the steering wheel only a small amount. Always keep your hands on
the steering wheel when using this system, regardless of warnings.
Depending on the vehicle and road conditions, the warning may not operate.
■Vehicle sway warning function
Depending on the vehicle and road conditions, the warning may not operate.
■White (yellow) lines are only on one side of road
The  LDA  system  will  not  operate  for  the  side  on  which  white  (yellow)  lines
could not be recognized. When  the  system  determines  that  the
driver  has  removed  their  hands  from  the
steering  wheel  while  the  steering  control
function is operating, a warning message
urging  the  driver  to  hold  the  steering
wheel  and the symbol shown  in the illus-
tration  are  displayed  on  the  multi-infor-
mation display.
When  the  system  determines  that  the
vehicle is swaying while the vehicle sway
warning  function  is  operating,  a  buzzer
sounds  and  a  warning  message  urging
the  driver  to  rest  and  the  symbol  shown
in  the  illustration  are  simultaneously  dis-
played on the multi-information display. 
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2454-5. Using the driving support systems
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Driving
■Conditions in which functions may not operate properly
In  the  following  situations,  the  camera  sensor  may  not  detect  white  (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  pavement
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  recognize  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 reflected light, etc.
●The  vehicle  is  driven  in  an  area  where  the  brightness  changes  suddenly,
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11[
●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  conditions
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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2464-5. Using the driving support systems
■Warning message
If the following warning message is displayed on the multi-information display
and  the  LDA  indicator  illuminates  in  amber,  follow  the  appropriate  trouble-
shooting procedure.
If  a  different  warning  message  is  displayed,  follow  the  instructions  displayed
on the screen. (P. 447)
■Customization
Some functions can be customized. (P. 100)
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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2474-5. Using the driving support systems
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Driving
In  vehicle-to-vehicle  distance  control  mode,  the  vehicle  automatically
accelerates, decelerates and stops to match the speed changes of the
preceding  vehicle  even  if  the  accelerator  pedal  is  not  depressed.  In
constant speed control mode, the vehicle runs at a fixed speed.
Use  the  dynamic  radar  cruise  control  with  full-speed  range  on  free-
ways and highways.
●Vehicle-to-vehicle distance control mode (P. 250)
●Constant speed control mode (P. 256)
■Meter display
Display
Set speed
Indicators
■Operation switches
Vehicle-to-vehicle  distance
switch
“+ RES” switch
Cruise control main switch
Cancel switch
“- SET” switch
Dynamic radar cruise controlwith full-
speed range
Summary of functions
1
2
3
1
2
3
4
5 
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2484-5. Using the driving support systems
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 limitations 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 ahead: 
P. 258
• Conditions  under  which  the  vehicle-to-vehicle  distance  control  mode
may not function correctly: P. 259
●Set the speed appropriately depending on the speed limit, traffic 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  remain  alert,
assess  the danger of  each situation  and  drive safely. Relying  on this  sys-
tem  or  assuming  the  system  ensures  safety  while  driving  can  lead  to  an
accident, resulting in death or serious injury.
●Switch the dynamic radar cruise control with full-speed range off 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 serious 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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Driving
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 ahead. 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 the safety of all
involved.
■Situations  unsuitable  for  dynamic  radar  cruise  control  with  full-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 cause 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 sharp up
and down gradients 
Vehicle speed may exceed the set speed when driving down a steep 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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2504-5. Using the driving support systems
This mode employs a radar sensor to detect the presence of vehicles
up  to  approximately  328  ft.  (100  m)  ahead,  determines  the  current
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 traveling 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-vehicle  dis-
tance switch.
Example of deceleration cruising 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  speed  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  suffi-
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-vehicle distance control mode
1
2