Lexus ES: 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 determines 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 operation
This function will operate in situations such as the following if a vehicle
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
WARNING
■To ensure the Parking Support Brake
(rear-crossing vehicles) can operate
properly
Observe the following precautions
regarding the rear radar sensors. 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 sensors,
and always keep the radar sensors and
their surrounding area on the bumper
clean.
- If the area around a rear radar sensor
is subjected to an impact, the system
may not operate properly due to a
sensor malfunction. Have the vehicle
inspected by your Lexus dealer.
- Observe the rear radar sensor handling
precautions.
■The Parking Support Brake function
(rear-crossing vehicles) will operate
when
The function will operate when the PKSB
OFF indicator is not illuminated or flashing
and all of the following conditions
are met:
- Hybrid system output restriction control
- The Parking Support Brake is enabled.
- The vehicle speed is 9 mph (15 km/h) or
less.
- Vehicles are approaching from the right
or left at the rear of the vehicle at a traveling
speed of more than approximately 5
mph (8 km/h)
- The shift lever is in R.
- The Parking Support Brake determines
that a stronger than normal brake operation
is necessary to avoid a collision with
an approaching vehicle.
- Brake control
- Hybrid system output restriction control
is operating.
- The Parking Support Brake determines
that an emergency brake operation is
necessary to avoid a collision with an
approaching vehicle.
■The Parking Support Brake function
(rear-crossing vehicles) will stop operating
when
The function will stop operating if any of the
following conditions are met:
- Hybrid system output restriction control
- The Parking Support Brake is disabled.
- 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 disabled.
- 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 control.
- A vehicle is no longer approaching from
the right or left at the rear of the vehicle.
■Detection area of the Parking Support
Brake function (rear-crossing vehicles)
The detection area of the Parking Support
Brake function (rear-crossing vehicles) differs
from the detection area of the RCTA
function. Therefore, even if the
RCTA function detects a vehicle and provides
an alert, the Parking Support Brake
function (rear-crossing vehicles) may not
start operating.
■Conditions under which the Parking
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 vehicles
and similar stationary objects*
- Small motorcycles, bicycles, pedestrians, etc.*
- Vehicles moving away from your vehicle
- Vehicles approaching from the parking
spaces next to your vehicle*
- Objects which are extremely close to a
radar sensor*
- Vehicles are approaching from the right
or left at the rear of the vehicle at a traveling
speed of less than approximately 5
mph (8 km/h)
- Vehicles are approaching from the right
or left at the rear of the vehicle at a traveling
speed of more than approximately 15
mph (24 km/h)
*: Depending on the conditions, detection
of a vehicle and/or object may occur.
■RCTA buzzer
Regardless of whether the RCTA function is
enabled or not, if the Parking
Support Brake function is enabled
and brake control is performed,
a buzzer will sound to notify the driver.
■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 vehicle
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-crossing vehicles)
may not operate properly
In some situations, such as the following, 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 additional 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 component,
such as a backlit license plate (especially
fluorescent type), fog light, 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 approaching
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 detection
area
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detected pedestrian is high, a buzzer will s
To keep driving safety and performance,
the following systems operate
automatically in response to
various driving situations. Be aware,
however, that these systems are
supplementary and should n
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