2022 TOYOTA MIRAI Owners Manual

2735-5. Using the driving support systems
Owners Manual_USA_M62084_en
5
Driving
*: If equipped
■Parking Support Brake
function (static objects)
 P.278
■Parking Support Brake
function (rear-crossing
vehicles)
 P.280
■Parking Support Brake
function (rear pedestrians)
 P.282PKSB (Parking Sup-
por t Brake)*
The Parking Support Brake
system consists of the fol-
lowing functions that oper-
ate when driving at a low
speed or backing up, such
as when parking. When the
system determines that the
probability of a collision
with a detected object or
pedestrian is high, a warn-
ing operates to urge the
driver to take evasive
action. If the system deter-
mines that the possibility of
a collision with a detected
object or pedestrian is
extremely high, the brakes
are automatically applied to
help avoid the collision or
help reduce the impact of
the collision.
PKSB (Parking Support
Brake) system
WARNING
■Cautions regarding the use of
the system
Do not overly rely on the system,
as doing so may lead to an acci-
dent.
Always drive while checking the
safety of the surroundings of the
vehicle.
Depending on the vehicle and
road conditions, weather, etc., the
system may n ot operate.
The detection cap abilities of sen-
sors and radars are limited.
Always drive while checking the
safety of the surroundings of the
vehicle.
●The driver is solely responsible
for safe driving. Always drive
carefully, taking care to observe
your surroundings. The Parking
Support Brake system is
designed to provide support to
lessen the severity of collisions.
However, it may not operate in
some situations.
●The Parking Support Brake sys-
tem is not designed to stop the
vehicle completely. Additionally,
even if the system has stopped
the vehicle, it is necessary to
depress the brake pedal imme-
diately as brake control will be
canceled after approximately 2
seconds.
●It is extremely dangerous to
check the system operations by
intentionally driving the vehicle
into the direction of a wall, etc.
Never attempt such actions.

2745-5. Using the driving support systems
Owners Manual_USA_M62084_en
The Parking Support Brake can
be enabled/disabled on the
multi-information display. All of
the Parking Support Brake func-
tions (static objects, rear-cross-
ing vehicles, and rear
pedestrians) are enabled/dis-
abled simultaneously.
Use the meter control switches
to enable/disable the parking
support brake. (P.100)
1 Press or to select .
2 Press or to select
“ PKSB” and then press
.
When the Parking Support Brake is
disabled, the PKSB OFF indicator
( P.94) illuminates.
To re-enable the system when it
was disabled, select on the
multi-information display, select
“ PKSB” and then On. If dis-
abled using this method, the sys-
tem will not be re-enabled by
turning the power switch off and
then to ON.
If the fuel cell system output restric-
tion control or brake control oper-
ates, a buzzer will sound and a
WARNING
■When to disable the Parking
Support Brake
In the following situations, disable
the Parking Support Brake as the
system may operate even though
there is no poss ibility of a colli-
sion.
●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
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
●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
●When using automatic car
washing devices
●If the vehicle cannot be driven in
a stable manner, such as when
the vehicle has been in an acci-
dent 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 a tire chains, compact
spare tire or an emergency tire
puncture repair kit is used
Enabling/Disabling the
Parking Support Brake
Display and buzzer for
fuel cell system output
restriction control and
brake control

2755-5. Using the driving support systems
Owners Manual_USA_M62084_en
5
Driving
message will be dis played on the
multi-information display and head-
up display (if equipped), multimedia
display, to alert the driver.
Depending on the situation, fuel cell
system output restriction control will
operate to either limit acceleration
or restrict output as much as possi-
ble.
 Fuel cell system output
restriction control is operating
(acceleration restriction)
Acceleration greater than a certain
amount is restricted by the system.
Multimedia display: No warning dis-
played
Multi-information display: “Object
Detected Acceleration Reduced”
Head-up display (if equipped): No
warning displayed
PKSB OFF indicator: Not illumi-
nated
Buzzer: Does not sound
 Fuel cell system output
restriction control is operating
(output restricted as much as
possible)
The system has determined that
stronger-than-normal brake opera-
tion is necessary.
Multimedia display: “BRAKE!”
Multi-information display: “BRAKE!”
Head-up display (if equipped):
“BRAKE!”
PKSB OFF indicator: Not illumi-
nated
Buzzer: Short beep
 Brake control is operating
The system determined that emer-
gency braking is necessary.
Multimedia display: “BRAKE!”
Multi-information display: “BRAKE!”
Head-up display (if equipped):
“BRAKE!”
PKSB OFF indicator: Not illumi-
nated
Buzzer: Short beep
 Vehicle stopped by system
operation
The vehicle has been stopped by
brake control operation.
Multimedia display: “Press Brake
Pedal”
Multi-information display: “Switch to
Brake” (If the acce lerator pedal is
not depressed, “Br ake” will be dis-
played.)
Head-up display (if equipped):
“Switch to Brake” (If the accelerator
pedal is not depressed, “Press
Brake Pedal” will be displayed.)
PKSB OFF indicato r: Illuminated
Buzzer: Short beep
If the Parking Support Brake
determines that a collision with a
detected object or pedestrian is
possible, the fuel cell system
output will be restricted to
restrain any increase in the vehi-
cle speed. (Fuel cell system out-
put restriction control: See figure
2.)
Additionally, if the accelerator
pedal continues to be
System overview

2765-5. Using the driving support systems
Owners Manual_USA_M62084_en
depressed, the brakes will be
applied automatically to reduce
the vehicle speed. (Brake con-
trol: See figure 3.)
Figure 1 When the PKSB
(Parking Support Brake) is not
operating
Fuel cell system output
Braking force
Time
 Figure 2 When fuel cell sys-
tem output restriction control
operates
Fuel cell system output
Braking force
Time
Fuel cell system output
restriction control begins
operating (System deter- mines that possibility of colli-
sion with detected object is
high)
 Figure 3 When fuel cell sys-
tem output restriction control
and brake control operates
Fuel cell system output
Braking force
Time
Fuel cell system output
restriction control begins
operating (System deter-
mines that possibility of colli-
sion with detected object is
high)
Brake control begins operat-
ing (System determines that
possibility of co llision with
detected object is extremely
high)
■If the Parking Support Brake
has operated
If the vehicle is stopped due to oper-
ation of the Parking Support Brake,
the Parking Support Brake will be
disabled and the PKSB OFF indica-
tor will illuminate. If the Parking Sup-
port Brake operates unnecessarily,
brake control can be canceled by
depressing the brake pedal or wait-

2775-5. Using the driving support systems
Owners Manual_USA_M62084_en
5
Driving
ing for approximately 2 seconds for
it to automatically be canceled.
Then, the vehicle can be operated
by depressing the accelerator pedal.
■Re-enabling the Parking Sup-
port Brake
To re-enable the Parking Support
Brake when it has been disabled
due to operation of the Parking Sup-
port Brake, either enable the system
again ( P.274), or turn the power
switch off and then back to ON.
Additionally, if any of the following
conditions are me t, the system will
be re-enabled automatically and the
PKSB OFF indicato r will turn off:
●The P shift position is selected
●The object is no longer detected in
the traveling direction of the vehi-
cle
●The traveling direction of the vehi-
cle changes*
*
: Except when the Parking Support Brake function (rear pedestrians)
operated.
■If “PKSB Unavailable” is dis-
played on the multi-information
display and the PKSB OFF indi-
cator is on
If the vehicle is stopped due to oper-
ation of the Parki ng Support Brake,
the Parking Suppor t Brake will be
disabled and the PKSB OFF indica-
tor will illuminate.
●A sensor may be covered with
water drops, ice, snow, dirt, etc.
Remove the water drops, ice,
snow, dirt, etc., from the sensor to
return the system to normal.
Also, due to ice forming on a sen-
sor at low temperatures, a warn-
ing message may be displayed or
the sensor may n ot be able to
detect an object. Once the ice
melts, the system will return to
normal.
●If this message is displayed only
when the R shift position is selected, the rear camera lens
may be dirty. Clean the camera
lens. If this message is displayed
when the shift position is any posi-
tion other than R,
a sensor on the
front or rear bumper may be dirty.
Clean the sensors and their sur-
rounding area on the bumpers.
●If this message continues to be
displayed even after cleaning the
sensor, or is displayed even
though the sensor is clean, have
the vehicle inspected by your Toy-
ota dealer.
■If a 12-volt battery terminal has
been disconnected and recon-
nected
The system needs to be initialized.
To initialize the system, drive the
vehicle straight ahead for 5 seconds
or more at a speed of approximately
22 mph (35 km/h) or more.

2785-5. Using the driving support systems
Owners Manual_USA_M62084_en
*: If equipped
This function will operate in situ-
ations such as the following if an
object is detected in the travel-
ing direction of the vehicle.
■When traveling at a low
speed and the brake pedal
is not depressed, or is
depressed late
■When the accelerator pedal
is depressed excessively
Parking Suppor t Brake
function (static
objects)
*
If the sensors detect a static
object, such as a wall, in the
traveling direction of the
vehicle and the system
determines that a collision
may occur due to the vehi-
cle suddenly moving for-
ward due to an accidental
accelerator pedal operation,
the vehicle moving the
unintended direction due to
the wrong shift position
being selected, or while
parking or traveling at low
speeds, the system will
operate to lessen the impact
with the detected static
object and reduce the
resulting damage.
Examples of function
operation

2795-5. Using the driving support systems
Owners Manual_USA_M62084_en
5
Driving
■When the vehicle moves in
the unintended direction
due to the wrong shift posi-
tion being selected
 P.254
■The Parking Support Brake
function (static object) will
operate when
The function will operate when the
PKSB OFF indicator is not illumi-
nated or flashing ( P.94, 445) and
all of the followin g conditions are
met:
●Fuel cell system output restriction
control
• The Parking Support Brake is
enabled.
• The vehicle speed is approxi- mately 9 mph (15 km/h) or less.
• There is a static object in the trav- eling direction of the vehicle and
approximately 6 to 13 ft. (2 to 4 m)
away.
• The Parking Support Brake deter- mines that a stronger-than-nor-
mal brake operation is necessary
to avoid a collision.
●Brake control
• Fuel cell system output restriction control is operating.
• The Parking Support Brake deter- mines that an immediate brake
operation is necessary to avoid a
collision.
■The Parking Support Brake
function (static objects) will
stop operating when
The function will stop operating if
any of the following conditions are
met:
●Fuel cell system output restriction
control
• The Parking Support Brake is dis- abled.
• The system determines that the collision has become avoidable
with normal brake operation.
• The static object is no longer approximately 6 to 13 ft. (2 to 4 m)
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 control.
• The static object is no longer approximately 6 to 13 ft. (2 to 4 m)
away from the vehicle or in the
traveling direction of the vehicle.
Types of sensors
WARNING
■To ensure the system can
operate properly
 P. 2 5 5
■If the Parking Support Brake
function (static objects) oper-
ates unnecessarily, such as
at a railroad crossing
 P. 2 7 6
■Notes when washing the vehi-
cle
 P. 2 5 5

2805-5. Using the driving support systems
Owners Manual_USA_M62084_en
■Detection range of the Parking
Support Brake function (static
objects)
The detection range of the Parking
Support Brake function (static
objects) differs from the detection
range of the intuitive parking assist.
(  P.259) Therefore, even if the intu-
itive parking assist detects an object
and provides a warning, the Parking
Support Brake function (static
objects) may not start operating.
■Situations in which the system
may not operate properly
 P. 2 5 7
■Situations in which the system
may operate even if there is no
possibility of a collision
 P. 2 5 7
*: If equipped
This function will operate in situ-
ations such as the following if a
vehicle is detected in the travel-
ing direction of the vehicle.
■When reversing, a vehicle is
approaching and the brake
pedal is not depressed, or
is depressed late
Parking Support Brake
function (rear-crossing
vehicles)
*
If a rear radar sensor
detects a vehicle approach-
ing 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 approach-
ing vehicle.
Examples of function
operation