
4265-5. Using the driving support systems
■The Parking Support Brake func- tion (static object) will operate  
when 
The function will operate when the  PKSB OFF indicator is not illuminated  
( P.170, 171) and all of the following  conditions are met:
●Hybrid system output restriction con-trol 
• The Parking Support Brake is  enabled.• The vehicle speed is approximately 15  
km/h (9 mph) or less. • There is a static object in the traveling direction of the vehicle and approxi- 
mately 2 to 4 m (6 to 13 ft.) away. • The Parking Support Brake deter-mines that a stronger-than-normal  
brake operation is necessary to avoid  a collision.
●Brake control• Hybrid system output restriction con-
WARNING
●If the area around a radar sensor is subjected to an impact, the system  
may not operate properly due to a  sensor malfunction. Have the vehi-cle inspected by any authorized  
Toyota retailer or Toyota authorized  repairer, or any reliable repairer.
■Handling the suspension 
Do not modify the suspension, as  changes to the height or inclination of  
the vehicle may prevent the sensors  from detecting objects correctly or cause the system to not operate or  
operate unnecessarily.
■If the Parking Support Brake 
function (static objects) operates  unnecessarily, such as at a rail-road crossing 
In the event that the Parking Support  Brake function (static objects) oper-ates unnecessarily, such as at a rail- 
road crossing, brake control will be  canceled after approximately 2 sec-onds, allowing you to proceed forward  
and leave the area, brake control can  also be canceled by depressing the brake pedal. Depressing the acceler- 
ator pedal after brake control is can- celed will allow you to proceed forward and leave the area.
■Notes when washing the vehicle 
Do not apply intensive bursts of water  
or steam to the sensor area. 
Doing so may result in the sensor  malfunctioning.
●When using a high pressure washer to wash the vehicle, do not  
spray the sensors directly, as doing  so may cause a sensor to malfunc-tion.
●When using steam to clean the vehicle, do not direct steam too  
close to the sensors as doing so  may cause a sensor to malfunction.
■When to disable the Parking Sup-port Brake 
In the following situations, disable the  
Parking Support Brake as the system  may operate even though there is no possibility of a collision.
●When inspecting the vehicle using a chassis roller, chassis dynamo or  
free roller
●When loading the vehicle onto a 
boat, truck or other transport vessel
●If the suspension has been modi-
fied or tires of a size other than  specified are installed
●If the front of the vehicle is raised or lowered due to the carried load
●When equipment that may obstruct a sensor is installed, such as a tow-ing eyelet, bumper protector (an  
additional trim strip, etc.), bicycle  carrier, or snow plow
●When using an automatic car wash 

427
5 5-5. Using the driving support systems
Driving
trol is operating
• The Parking Support Brake deter-
mines that an immediate brake opera-
tion is necessary to avoid a collision.
■The Parking Support Brake func-
tion (static objects) will stop oper-
ating when
The function will stop operating if any of 
the following conditions are met:
●Hybrid system output restriction con-
trol
• The Parking Support Brake is dis-
abled.
• The system determines that the colli-
sion has become avoidable with nor-
mal brake operation.
• The static object is no longer approxi-
mately 2 to 4 m (6 to 13 ft.) away from 
the vehicle or in the traveling direction 
of the vehicle.
●Brake control
• The Parking Support Brake is dis-
abled.
• Approximately 2 seconds have 
elapsed since the vehicle was 
stopped by brake control.
• The brake pedal is depressed after 
the vehicle is stopped by brake con-
trol.
• The static object is no longer approxi-
mately 2 to 4 m (6 to 13 ft.) away from 
the vehicle or in the traveling direction 
of the vehicle.
■Detection range of the Parking Sup-
port Brake function (static objects)
The detection range of the Parking Sup-
port Brake function (static objects) dif-
fers from the detection range of the 
Toyota parking assist-sensor. (P.418) 
Therefore, even if the Toyota parking 
assist-sensor detects an object and pro-
vides a warning, the Parking Support 
Brake function (static objects) may not 
start operating.
■Objects that the Parking Support 
Brake function (static objects) may 
not detect
The sensors may not be able to detect 
certain objects, such as the following:
●Pedestrian
●Cotton, snow, and other materials that 
are poor reflectors of sonic waves
●Objects which are not perpendicular 
to the ground, are not perpendicular to 
the traveling direction of the vehicle, 
are uneven or are waving
●Low objects
●Thin objects such as wires, fences, 
ropes and signposts
●Objects that are extremely close to 
the bumper
●Sharply-angled objects
●Tall objects with upper sections pro-
jecting outwards in the direction of 
your vehicle
■Situations in which the Parking 
Support Brake function (static 
objects) may not operate
When the shift lever is in N
■Toyota parking assist-sensor 
buzzer
Regardless of whether the Toyota park-
ing assist-sensor function is enabled or 
not (P.415), if the Parking Support 
Brake function (static objects) is enabled 
(P.421), the front or rear sensors 
detect an object and brake control and 
hybrid system output restriction control 
are performed, the Toyota parking 
assist-sensor buzzer will sound to notify 
the driver of the approximate distance to 
the object.
■Situations in which the Parking 
Support Brake function (static 
objects) may operate even if there 
is no possibility of a collision
In some situations, such as the follow-
ing, the Parking Support Brake function 
(static objects) may operate even 
though there is no possibility of a colli-
sion.
●Vehicle surroundings
• When driving on a narrow road 

4285-5. Using the driving support systems
• When driving on a gravel road or in an 
area with tall grass
• When driving toward a banner, flag, 
low-hanging branch or boom barrier 
(such as those used at railroad cross-
ings, toll gates and parking lots)
• When there is a structure on the road-
side (such as when driving in a narrow 
tunnel, on a narrow bridge or on a nar-
row road)
• When parallel parking
• When there is a rut or hole in the sur-
face of the road
• When driving on a metal cover (grat-
ing), such as those used for drainage 
ditches
• When driving up or down a steep 
slope
• If a sensor is hit by a large amount of 
water, such as when driving on a 
flooded road
• When loaded on ships or trucks
• Moving type automatic car wash
• Lift type parking area or multi-story 
parking lot
• Underground parking area
• Structures on the ground (speed 
bumps, cat’s eyes, etc.)
• Differences in height
• When moving straight ahead or turn-
ing right
• Snow-melting pipes
• Devices for detecting vehicles, such 
as traffic lights, devices for detecting traffic congestion, or devices for 
detecting empty spaces in parking 
areas
• Railroad tracks
• H-shaped steel
• When there are vehicles on both 
sides, or there is a vehicle that resem-
bles this vehicle
●Weather
• If a sensor is covered with ice, snow, 
dirt, etc. (when cleared, the system 
will return to normal)
• If heavy rain or water strikes a sensor
• When driving in inclement weather 
such as fog, snow or a sandstorm
• Strong wind is blowing
●Other sonic wave sources
• When vehicle horns, vehicle detec-
tors, motorcycle engines, air brakes of 
large vehicles, the clearance sonar of 
other vehicles or other devices which 
produce ultrasonic waves are near the 
vehicle
• If a sticker or an electronic compo-
nent, such as a backlit license plate 
(especially fluorescent type), fog 
lights, fender pole or wireless antenna 
is installed near a sensor
●Changes in the vehicle posture
• If the vehicle is significantly tilted
• If the front of the vehicle is raised or 
lowered due to the carried load
• If the orientation of a sensor has been 
changed due to a collision or other 
impact
■Situations in which the Parking 
Support Brake function (static 
objects) may not operate properly
In some situations, such as the follow-
ing, this function may not operate prop-
erly.
●Weather
• When a sensor or the area around a 
sensor is extremely hot or cold 

429
5 5-5. Using the driving support systems
Driving
• When strong winds are blowing
• If a sensor is covered with ice, snow, 
dirt, etc. (when cleared, the system 
will return to normal)
• If heavy rain or water strikes a sensor
• When driving in inclement weather 
such as fog, snow or a sandstorm
• A sensor is frozen. (Thawing the area 
will resolve this problem.)
●Vehicle surroundings
• When an object that cannot be 
detected is between the vehicle and a 
detected object
• If an object such as a vehicle, motor-
cycle, bicycle or pedestrian cuts in 
front of the vehicle or runs out from 
the side of the vehicle
• The vehicle is approaching a tall or 
curved curb.
• On an extremely bumpy road, on an 
incline, on gravel, or on grass.
• The objects draw too close to the sen-
sor.
●Other sonic waves sources
• When vehicle horns, vehicle detec-
tors, motorcycle engines, air brakes of 
large vehicles, the clearance sonar of 
other vehicles or other devices which 
produce ultrasonic waves are near the 
vehicle
• If a sticker or an electronic compo-
nent, such as a backlit license plate 
(especially fluorescent type), fog lights, fender pole or wireless antenna 
is installed near a sensor
●Changes in the vehicle
• If the vehicle is significantly tilted
• If the front of the vehicle is raised or 
lowered due to the carried load
• If the orientation of a sensor has been 
changed due to a collision or other 
impact
• When equipment that may obstruct a 
sensor is installed, such as a towing 
eyelet, bumper protector (an addi-
tional trim strip, etc.), bicycle carrier, 
or snow plow
• If the suspension has been modified 
or tires of a size other than specified 
are installed
• If paint or a sticker is applied to the 
sensor 

4305-5. Using the driving support systems
*: If equipped
This function will operate in situa- 
tions such as the following if a vehi- 
cle is detected in the traveling  
direction of the vehicle.
■When reversing, a vehicle is 
approaching and the brake  
pedal is not depressed, or is  
depressed late 
 P.408
■The Parking Support Brake func- tion (rear-crossing vehicles) will operate when 
The function will operate when the  PKSB OFF indicator is not illuminated ( P.170, 171) and all of the following  
conditions are met:
●Hybrid system output restriction con-
trol • The Parking Support Brake is enabled. 
• The vehicle speed is approximately 15  km/h (9 mph) or less.
Parking Support Brake  
function (rear-crossing  
vehicles)*
If a rear radar sensor detects a  
vehicle approaching from the  
right or left at the rear of the  
vehicle and the system deter- 
mines that the possibility of a  
collision is high, this function  
will perform brake control to  
reduce the likelihood of an  
impact with the approaching  
vehicle.
Examples of function opera- 
tion
Types of sensors
WARNING
■To ensure the Parking Support  
Brake (rear-crossing vehicles)  can operate properly 
Observe the following precautions  
regarding the rear radar sensors  ( P.408). Failure to do so may cause  
a sensor to not operate properly, and  may cause an accident.
●Do not modify, disassemble or paint the sensors.
●Do not replace a rear radar sensor with a part other than a genuine part.
●Do not damage the rear radar sen-sors, and always keep the radar  
sensors and their surrounding area  on the bumper clean.
●If the area around a rear radar sen-sor is subjected to an impact, the system may not operate properly  
due to a sensor malfunction. Have  the vehicle inspected by any autho-rized Toyota retailer or Toyota  
authorized repairer, or any reliable  repairer.
●Observe the rear radar sensor han-dling precautions. ( P.408) 

431
5 5-5. Using the driving support systems
Driving
• Vehicles are approaching from the 
right or left at the rear of the vehicle at 
a traveling speed of more than 
approximately 8 km/h (5 mph)
• The shift lever is in R.
• The Parking Support Brake deter-
mines that a stronger than normal 
brake operation is necessary to avoid 
a collision with an approaching vehi-
cle.
●Brake control
• Hybrid system output restriction con-
trol is operating
• The Parking Support Brake deter-
mines that an emergency brake oper-
ation is necessary to avoid a collision 
with an approaching vehicle.
■The Parking Support Brake func-
tion (rear-crossing vehicles) will 
stop operating when
The function will stop operating if any of 
the following conditions are met:
●Hybrid system output restriction con-
trol
• The Parking Support Brake is dis-
abled.
• The collision becomes avoidable with 
normal brake operation.
• A vehicle is no longer approaching 
from the right or left at the rear of the 
vehicle.
●Brake control
• The Parking Support Brake is dis-
abled.
• Approximately 2 seconds have 
elapsed since the vehicle was 
stopped by brake control.
• The brake pedal is depressed after 
the vehicle is stopped by brake con-
trol.
• A vehicle is no longer approaching 
from the right or left at the rear of the 
vehicle.
■Detection area of the Parking Sup-
port Brake function (rear-crossing 
vehicles)
The detection area of the Parking Sup-
port Brake function (rear-crossing vehi-
cles) differs from the detection area of 
the RCTA function (P.412). Therefore, even if the RCTA function detects a 
vehicle and provides an alert, the Park-
ing Support Brake function (rear-cross-
ing vehicles) may not start operating.
■Conditions under which the Park-
ing Support Brake function (rear-
crossing vehicles) will not detect a 
vehicle
The Parking Support Brake function 
(rear-crossing vehicles) is not designed 
to detect the following types of vehicles 
and/or objects:
●Vehicles approaching from directly 
behind
●Vehicles backing up in a parking 
space next to your vehicle
●Vehicles that the sensors cannot 
detect due to obstructions
●Vehicles which suddenly accelerate or 
decelerate near your vehicle
●Guardrails, walls, signs, parked vehi-
cles and similar stationary objects*
●Small motorcycles, bicycles, pedestri-
ans, etc.*
●Vehicles moving away from your vehi-
cle
●Vehicles approaching from the park-
ing spaces next to your vehicle*
●Objects which are extremely close to 
a radar sensor*
●Vehicles which are approaching from 
the right or left at the rear of the vehi-
cle at a traveling speed of less than 
approximately 8 km/h (5 mph)
●Vehicles which are approaching from 
the right or left at the rear of the vehi-
cle at a traveling speed of more than  

4325-5. Using the driving support systems
approximately 24 km/h (15 mph)
*: Depending on the conditions, detec-
tion of a vehicle and/or object may 
occur.
■Situations in which the system may 
operate even though there is no 
possibility of a collision
In some situations such as the following, 
the Parking Support Brake function 
(rear-crossing vehicles) may operate 
even though there is no possibility of a 
collision.
●When the parking space faces a 
street and vehicles are being driven 
on the street
●When a detected vehicle turns while 
approaching the vehicle
●When a vehicle passes by the side of 
your vehicle
●When the distance between your vehi-
cle and metal objects, such as a 
guardrail, wall, sign, or parked vehicle, which may reflect electrical waves 
toward the rear of the vehicle, is short 
●When there are spinning objects near 
your vehicle such as the fan of an air 
conditioning unit
●When water is splashed or sprayed 
toward the rear bumper, such as from 
a sprinkler
■Situations in which the Parking 
Support Brake function (rear-cross-
ing vehicles) may not operate prop-
erly
In some situations, such as the follow-
ing, the radar sensors may not detect an 
object and this function may not operate 
properly
●Stationary objects
●When a sensor or the area around a 
sensor is extremely hot or cold
●If the rear bumper is covered with ice, 
snow, dirt, etc.
●When it is raining heavily or water 
strikes the vehicle
●When the detection area of a radar 
sensor is obstructed by an adjacent 
vehicle
●If the vehicle is significantly tilted
●When equipment that may obstruct a 
sensor is installed, such as a towing 
eyelet, bumper protector (an addi-
tional trim strip, etc.), bicycle carrier, 
or snow plow
●If the suspension has been modified 
or tires of a size other than specified 
are installed
●If the front of the vehicle is raised or 
lowered due to the carried load
●If a sticker or an electronic compo- 

433
5 5-5. Using the driving support systems
Driving
nent, such as a backlit license plate 
(especially fluorescent type), fog 
lights, fender pole or wireless antenna 
is installed near a radar sensor
●If the orientation of a radar sensor has 
been changed
●When multiple vehicles are approach-
ing with only a small gap between 
each vehicle
●If a vehicle is approaching the rear of 
your vehicle rapidly 
●Situations in which the radar sensor 
may not detect a vehicle
• When a vehicle approaches from the 
right or left at the rear of the vehicle 
while you are turning while backing up
• When turning while backing up
• When backing out of a shallow angle 
parking spot
• When backing up on a slope with a 
sharp change in grade• When a vehicle turns into the detec-
tion area