
3744-5. Using the driving support systems
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WARNING
■Emergency steering assist (for region A) 
● As emergency steering assist operation will be canceled when the system 
determines that lane departure prevention function has been com pleted. 
● Emergency steering assist may not operate or may be cancel in the follow- 
ing cases as the system may determine the driver is taking acti ons. 
• If the accelerator pedal is being depressed strongly, the stee ring wheel 
is  being  operated  sharply,  the  brake  pedal  is  being  depressed  o r  the 
turn signal lever is being  operated. In this case, the system m ay deter- 
mine that the driver is taking evasive action and the emergency  steering 
assist may not operate. 
• In  some  situations,  while  the  emergency  steering  assist  is  ope rating, 
operation  of  the  function  may  be  canceled  if  the  accelerator  pe dal  is 
depressed strongly, the steering wheel is operated sharply or t he brake 
pedal  is  being  depressed  and  the  system  determines  that  the  dri ver  is 
taking evasive action. 
• When  the emergency  steering  assist  is  operating,  if the  steeri ng  wheel 
is  held  firmly  or  is  operated  in  the  opposite  direction  to  that   which  the 
system is generating torque, the function may be canceled. 
■ 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  chassis 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  grille, 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 

3754-5. Using the driving support systems
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Driving
C-HR_HV_OM_Europe_OM10720E 
■Enabling/disabling the pre-collision system
The pre-collision system can be enabled/disabled on   (P. 787) 
of the multi-information display.
The  system  is  automatically  enabled  each  time  the  power  switch  is 
turned to ON mode.
If the system is disabled, the 
PCS  warning  light  will  turn  on 
and  a  message  will  be  dis- 
played  on  the  multi-information 
display.
WARNING
● 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  sensor  or  front 
camera is temporarily installed to the vehicle
Changing settings of the pre-collision system 

3864-5. Using the driving support systems
C-HR_HV_OM_Europe_OM10720E 
● For  region A:  In  addition  to  the  above,  in  some  situations,  such  as  the  fol- 
lowing, the emergency steering assist may not operate. 
• For region A: When the white (yellow) lane lines are difficult  to see, such 
as when they are faint, diverging/merging, or a shadow is cast  upon them 
• For region A: When the lane is wider or narrower than normal 
• For region A: When there is a light and dark pattern on the ro ad surface, 
such as due to road repairs 
• For  region A:  When  a  pedestrian  is  detected  near  the  centerlin e  of  the 
vehicle 
• For region A: When the target is too close 
• For  region A:  When  there  is  insufficient  safe  or  unobstructed  space  for 
the vehicle to be steered into 
• For region A: If oncoming vehicle is present 
• For region A: If VSC function is operating 
● In some situations such as the following, sufficient braking force or steering 
force (for  region A)  may  not  be  obtained,  preventing  the  system  from  per- 
forming 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 
• When the road surface has deep wheel tracks 
• When driving on a hill road 
• When driving on a road that has inclines to the left or right 
■ If VSC is disabled 
● If VSC is disabled (P. 535), the pre-collision brake assist and pre-collision 
braking functions are also disabled. 
● The PCS warning light will turn on and “VSC Turned Off. Pre-Collision Brake 
System Unavailable.” will be displayed on the multi-information  display. 

3884-5. Using the driving support systems
C-HR_HV_OM_Europe_OM10720E
WARNING
■Situations unsuitable for LTA system 
In the following situations, use the LTA switch to turn the sys tem off. Failure 
to do so may lead to an accident, resulting in death or serious  injury. 
● Vehicle is driven on a road surface which is slippery due to rainy weather, 
fallen snow, freezing, etc. 
● Vehicle is driven on a snow-covered road. 
● White (yellow) lines are difficult to see due to rain, snow, fog, dust, etc. 
● Vehicle is driven in a temporary lane or restricted lane due to construction 
work. 
● Vehicle is driven in a construction zone. 
● A spare tire, tire chains, etc. are equipped. 
● When the tires have been excessively worn, or when the tire inflation pres- 
sure is low. 
● When your vehicle is towing a trailer or during emergency towing 
■ Preventing  LTA  system  malfunctions  and  operations  performed  by 
mistake 
● Do  not  modify  the  headlights  or  place  stickers,  etc.  on  the  surface  of  the 
lights. 
● Do  not  modify  the  suspension  etc.  If  the  suspension  etc.  needs to  be 
replaced,  contact  any  authorized  Toyota  retailer  or  Toyota  auth orized 
repairer, or any reliable repairer. 
● Do not install or place anything on the hood or grille. Also, do not install a 
grille guard (bull bars, kangaroo bar, etc.). 
● If your windshield needs repairs, contact any authorized Toyota retailer or 
Toyota authorized repairer, or any reliable repairer. 

3914-5. Using the driving support systems
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Driving
C-HR_HV_OM_Europe_OM10720E
WARNING
●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. 
● If the edge of the road is not clear or straight. 
● 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, 
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 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 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). 
● When driving in a tunnel or at night with the headlights off or when a head- 
light is dim due to its lens being dirty or it being misaligned . 
● The vehicle is struck by a crosswind. 
● The vehicle is affected by wind from a vehicle driven in a nearby lane. 
● The vehicle has just changed lanes or crossed an intersection. 
● Tires  which  differ  by  structure,  manufacturer,  brand  or  tread  pattern  are 
used. 
● When tires of a size other than specified are installed. 
● Snow tires, etc. are equipped. 
● The vehicle is being driven at extremely high speeds. 

4554-5. Using the driving support systems
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Driving
C-HR_HV_OM_Europe_OM10720E 
● Instances  of  the  BSM  function  unnecessarily  detecting  a  vehicle  and/or 
object may increase in the following situations: 
• When the sensor is misaligned due to a strong impact to the se nsor or its 
surrounding area
• When  the  distance  between  your  vehicle  and  a  guardrail,  wall,  etc.,  that 
enters the detection area is short 
• When driving up and down consecutive steep inclines, such as h ills, dips 
in the road, etc. 
• When  vehicle  lanes  are  narrow,  or  when  driving  on  the  edge  of  a  lane, 
and a vehicle traveling in a lane other than the adjacent lanes  enters the 
detection area 
• When driving on roads with sharp bends, consecutive curves, or  uneven 
surfaces
• When the tires are slipping or spinning 
• When the distance between your vehicle and a following vehicle  is short 
• When  a  bicycle  carrier  or  other  accessory  is  installed  to  the  rear  of  the 
vehicle 

4674-5. Using the driving support systems
4
Driving
C-HR_HV_OM_Europe_OM10720E
WARNING
■Cautions regarding the use of the system 
There  is  a  limit  to  the  degree  of  recognition  accuracy  and  cont rol  perfor- 
mance that  this system can  provide,  do not overly  rely on  this  system. The 
driver is always responsible for paying attention to the vehicl e’ surroundings 
and driving safely. 
■ To ensure the system can operate properly 
Observe the following precautions.  
Failing  to  do  so  may  result  in  the  vehicle  being  unable  to  be  d riven  safely 
and possibly cause an accident. 
● Do not damage the sensors, and always keep them clean. 
● Do not attach a sticker or install an electronic component, such as a backlit 
license  plate  (especially  fluorescent  type),  fog  lights,  fender   pole  or  wire- 
less antenna near a radar sensor. 
● Do  not  subject  the  surrounding  area  of  the  sensor  to  a  strong  impact.  If 
subjected  to  an  impact,  have  the  vehicle  inspected  by  any  autho rized 
Toyota retailer or Toyota authorized repairer, or any reliable  repairer. If the 
front  or  rear  bumper  needs  to  be  removed/installed  or  replaced,   contact 
any authorized Toyota retailer or Toyota authorized repairer, o r any reliable 
repairer. 
● Do not modify, disassemble or paint the sensors. 
● Do not attach a license plate cover. 
● Keep your tires properly inflated. 
■ When to disable the function 
In  the  following  situations,  disable  the  function  as  it  may  ope rate  even 
though there is no possibility of a collision. 
● Failing to observe the warnings above. 
● A non-genuine Toyota suspension (lowered suspension, etc.) is installed. 

4744-5. Using the driving support systems
C-HR_HV_OM_Europe_OM10720E 
■ Situations in which the system may not operate properly 
The  RCTA  function  may  not  detect  vehicles  correctly  in  the  foll owing  situa- 
tions: 
● When  the  sensor  is  misaligned  due  to  a  strong  impact  to  the  sensor  or  its 
surrounding area 
● When  mud, snow, ice,  a  sticker, etc., is  covering  the sensor  or  surrounding 
area on the position above the rear bumper 
● When  driving  on  a  road  surface  that  is  wet  with  standing  water during  bad 
weather, such as heavy rain, snow, or fog 
● When  multiple  vehicles  are  approaching  with  only  a  small  gap  between 
each vehicle 
● When a vehicle is approaching at high speed 
● When  equipment  that  may  obstruct  a  sensor  is  installed,  such  as a towing 
eyelet,  bumper  protector  (an  additional  trim  strip,  etc.),  bicy cle  carrier,  or 
snow plow 
● When towing a trailer 
● When there is a significant difference in height between your vehicle and the 
vehicle that enters the detection area 
● When a sensor or the area around a sensor is extremely hot or cold 
● If  the  suspension  has  been  modified  or  tires  of  a  size  other  than  specified 
are installed 
● When  backing  up  on  a  slope  with  a 
sharp change in grade 
● When backing out of a sharp angle park- 
ing spot