TOYOTA PRIUS PRIME 2019 (in English) Service Manual

39
Quick overview-Toyota Safety Sense™ P (TSS-P)
Sensors
TSS-P combines an in-vehicle camera mounted in front of the inside rear \
view mirror
and a millimeter-wave radar mounted in the front grill. These sensors su\
pport the
driver assist systems.
Camera sensor
Radar sensor
TOYOTA SAFETY SENSE™
Toyota Safety Sense™ P (TSS-P) is a set of active safety technologies designed
to help mitigate or prevent collisions across a wide range of traffic si\
tuations, in
certain conditions. TSS-P is designed to help support the driver’s aw\
areness,
decision making and vehicle operation contributing to a safe driving exp\
erience.
Refer to the Owner’s Manual for operation, setting adjustments, limitations and
more details to understand these functions and complete safety precautions. For
more information, please go to http://www.toyota.com/safety-sense
Lane Departure Alert with Steering Assist (LDA w/SA)
LDA w/SA is designed to provide notification when the system detects
an unintended lane departure.
The Steering Assist function is designed to provide small corrective
steering inputs to the steering wheel for a short period of time to help\

keep the vehicle in its lane.
Automatic High Beams (AHB)
AHB is designed to detect the headlights of oncoming vehicles and the
tail lights of preceding vehicles and switch between high beams and
low beams as appropriate.
Pre-Collision System with Pedestrian Detection (PCS w/PD)
PCS w/PD is designed to provide alert, mitigation, and/or avoidance
support in certain conditions, when the system detects a potential
collision with a preceding vehicle is likely to occur.
The advanced millimeter-wave radar sensor system is designed to
work with the camera sensor to help recognize a preceding pedestrian,
and provide an alert, mitigation and/or avoidance support in certain
conditions.
Full-Speed Range Dynamic Radar Cruise Control (DRCC)
DRCC is designed to help maintain a pre-set distance to a preceding
vehicle when the preceding vehicle is traveling at a lower speed.
OVERVIEW
ELECTRIC VEHICLE SYSTEM
FEATURES & OPERATIONS
TOYOTA SAFETY SENSE
SAFETY &
EMERGENCY FEATURES

40
The Pre-Collision System uses a radar sensor and camera sensor to help d\
etect a
vehicle or pedestrian in front of your vehicle.
As there is a limit to the degree of recognition accuracy and control pe\
rformance
that this system can provide, do not overly rely on this system. This sy\
stem will not
prevent collisions or lessen collision damage or injury in every situati\
on. Do not use
PCS instead of normal braking operations under any circumstances. Do not\
attempt
to test the operation of the pre-collision system yourself, as the syste\
m may not
operate or engage, possibly leading to an accident. In some situations, \
such as
when driving in inclement weather such as heavy rain, fog, snow or a san\
dstorm or
while driving on a curve and for a few seconds after driving on a curve,\
a vehicle or
pedestrian may not be detected by the radar and camera sensors, preventi\
ng the
system from operating or engaging properly.
Refer to the Toyota Owner’s Manual for a list of additional situation\
s in which the
system may not operate properly.Refer to the Toyota Owner’s Manual for additional information on PCS \
w/PD
operation, settings adjustments, limitations, and precautions before att\
empting to
use it. Pre-Collision Warning
When the system determines that the possibility of a frontal collision i\
s high, a
buzzer will sound and a warning message will be displayed on the Multi-I\
nformation
Display (MID) to urge the driver to take evasive action.
Pre-Collision Brake Assist
If the driver notices the hazard and brakes, the system may provide addi\
tional
braking force using Brake Assist. This system may prime the brakes and m\
ay apply
greater braking force in relation to how strongly the brake pedal is dep\
ressed.
Pre-Collision Braking
If the driver does not brake in a set time and the system determines tha\
t the
possibility of a frontal collision with a preceding vehicle is extremely\
high, the
system may automatically apply the brakes, reducing speed in order to he\
lp the
driver reduce the impact and in certain cases avoid the collision.
Pre-Collision System with Pedestrian
Detection (PCS w/PD)
TOYOTA SAFETY SENSE
™

41
CHANGING PCS ALERT TIMING
Far
Middle
(default)
Near
(1) Press “” switches and select from the Multi-Information Display (MID).
(2) Press “
” switches and select from the MID and then press “”. The
setting screen is displayed.
(3) Press “
” each time to change the setting. Each time it is pressed, the
response to the PCS alert timing changes as shown above. You can press “
” to
go back to the menu.
Note: PCS is enabled each time the engine switch is turned to Ignition On.
The system can be disabled/enabled and the alert timing of the system can be
changed. (Alert timing only, brake operation remains the same.)
Monocular camera sensor
Millimeter
wave radar
As part of the Pre-Collision System, this function is also designed to f\
irst provide an
alert and then automatic braking if needed.Under certain conditions, the PCS system included with the TSS-P package may
also help to detect a pedestrian in front of your vehicle using the in-v\
ehicle camera
and front-grill mounted millimeter wave radar. The in-vehicle camera of \
PCS
detects a potential pedestrian based on size, profile, and motion of the\
detected
pedestrian. However, a pedestrian may not be detected depending on the
conditions, including the surrounding brightness and the motion, posture\
, size, and
angle of the potential detected pedestrian, preventing the system from o\
perating or
engaging.
Refer to the Toyota Owner’s Manual for additional limitations and inf\
ormation.
PCS PEDESTRIAN DETECTION
OVERVIEW
ELECTRIC VEHICLE SYSTEM
FEATURES & OPERATIONS
TOYOTA SAFETY SENSE
SAFETY &
EMERGENCY FEATURES

42
TOYOTA SAFETY SENSE™
DISABLING PRE-COLLISION SYSTEM (PCS)
LDA in TSS-P uses an in-vehicle camera designed to detect visible white \
and
yellow lane markers in front of the vehicle and the vehicle’s positio\
n on the road.
If the system determines that the vehicle is starting to unintentionally\
deviate from
its lane, the system alerts the driver with an audio and visual alert. W\
hen the alerts
occur, the driver must check the surrounding road situation and carefull\
y operate
the steering wheel to move the vehicle back to the center part of their \
lane.
LDA is designed to function at speeds of approximately 32 MPH or higher \
on
relatively straight roadways.
In addition to the alert function, LDA w/SA also features a steering ass\
ist
function. When enabled, if the system determines that the vehicle is on \
a path
to unintentionally depart from its lane, the system may provide small co\
rrective
steering inputs to the steering wheel for a short period of time to help\
keep the
vehicle in its lane.
(1) Press “” switches and select from the Multi-Information Display (MID).
(2) Press “
” switches and select the setting function from the MID and then
press “
”. The setting screen is displayed.
(3) Press “
” each time to change the setting. You can press “” to go back to
the menu.
Lane Departure Alert with Steering Assist
(LDA w/SA)

43
OVERVIEW
ELECTRIC VEHICLE SYSTEM
FEATURES & OPERATIONS
TOYOTA SAFETY SENSE
SAFETY &
EMERGENCY FEATURES
TURNING THE LDA SYSTEM ON/OFF
Press the LDA switch to turn the LDA system on. Depress again to turn it\
off.
Note: Operation of the LDA system and setting adjustments continues in the
same condition regardless of Ignition cycle until changed by the driver or the
system is reset.
Refer to the Toyota Owner’s Manual for additional information on LDA \
operation,
settings adjustments, limitations, and precautions before attempting to \
use it.
LANE DEPARTURE ALERT
LDA function display
Steering control indicator LDA indicator
LDA function display
Lane markers
(2)
(1)
Lane Departure Alert (LDA) indicator flashes orange when operating.
Steering wheel operation support

44
TOYOTA SAFETY SENSE™
The LDA function displays when the Multi-Information Display (MID) is
switched to the driving assist system information screen.
(1) The system displays solid white lines on the LDA indicator when visible lane
markers on the road are detected. A side flashes orange to alert the dri\
ver when the
vehicle deviates from its lane.
(2) The system displays outlines on the LDA indicator when lane markers on the
road are not detected or the function is temporarily cancelled.
Note: When operation conditions are no longer met, a function may be
temporarily canceled. However, when the operation conditions are met again,
operation of the function is automatically restored. For example, LDA may not
function on the side(s) where white/yellow lines are not detectable.
Refer to the Toyota Owner’s Manual for additional information on LDA \
operation,
settings adjustments, limitations, and precautions before attempting to \
use it.
The driver can adjust the sensitivity of the LDA (warning) function from the
Multi-Information Display (MID) customization screen. High - Is designed to warn approximately before the front tire crosses
the lane marker.
Normal - Is designed to warn approximately when the front tire crosses
the lane marker.
(1) Press “
” switches and select from the Multi-Information Display (MID).
(2) Press “
” switches and select the setting function and then press “”.
(3) Press “
” each time to change the setting.
(4) Press “
” to go back to the menu.
(1) Press “
” switches and select from the Multi-Information Display (MID).
(2) Press “
” switches and select the setting function and then press “”.
(3) Press “
” each time to change the setting.
(4) Press “
” to go back to the menu.
Note: Operation of the LDA system and setting adjustments continues in the
same condition regardless of Ignition cycle until changed by the driver or the
system is reset.
LANE DEPARTURE ALERT (CONTINUED)
CHANGING LDA ALERT SENSITIVITY
DISABLING STEERING ASSIST

45
OVERVIEW
ELECTRIC VEHICLE SYSTEM
FEATURES & OPERATIONS
TOYOTA SAFETY SENSE
SAFETY &
EMERGENCY FEATURES
SWS is a function of LDA and is designed to detect swaying based on the \
vehicle
location in the lane and the driver’s steering wheel operation. To he\
lp prevent
swaying, the system alerts the driver using a buzzer sound and a warning\
displays
in the MID.
Continuous lane deviations from
swaying.
Gentle swaying from driver’s
inattentiveness.
Acute steering wheel operation after the
number of operations decrease due to driver’s
inattentiveness.
(1) Press “” switches and select from the Multi-Information Display (MID).
(2) Press “
” switches and select the setting function and then press “”.
(3) Press “
” each time to change the setting.
(4) Press “
” to go back to the menu.
(1) Press “
” switches and select from the Multi-Information Display (MID).
(2) Press “
” switches and select the setting function and then press “”.
(3) Press “
” each time to change the setting.
(4) Press “
” to go back to the menu.
Note: Operation of the LDA system and setting adjustments continues in the
same condition regardless of Ignition cycle until changed by the driver or the
system is reset.
SWAY WARNING SYSTEM
ADJUSTING SWAY ALERT SENSITIVITY
DISABLING LDA SWAY WARNING SYSTEM

46
TOYOTA SAFETY SENSE™
TURNING SYSTEM ON/OFF
ADJUSTING SET SPEED
1 The set speed may also be cancelled by depressing the brake pedal.
2 The set speed may be resumed once vehicle speed exceeds 25 mph.
DRCC helps maintain a pre-set distance to a preceding vehicle when the p\
receding
vehicle is traveling at a lower speed. This mode is always selected firs\
t when
the cruise control button is depressed. Constant speed control mode is a\
lso
available. Full-Speed Range DRCC is designed to function at speeds betwe\
en 0 to
approximately 110 MPH and is intended for highway use.
Vehicle will cruise at a set speed, decelerate to maintain selected dist\
ance from a
slower vehicle traveling in front and accelerate back up to the selected\
speed if the
vehicle in front changes lanes or speeds up.

(1) Push the ON-OFF button. The “RADAR READY” or “
” indicator will come on.
(2) Push the lever down to SET speed, push it up to Resume and pull it or depress brake to Cancel.
(3) Push up to increase the set speed, push down to decrease (1 mph [1.6 km/h] or 1 km/h [0.6 mph] increments).
(3)
(1) (2)
Decrease
speed Increase
speed
Cancel1
Resume2
Set
Display Set speed
Full-Speed Range Dynamic Radar Cruise
Control vehicle-to-vehicle distance button
Cruise control switch Indicators
Full-Speed Range

Dynamic Radar Cruise Control (DRCC)
Refer to page 48 for switching to Constant Speed (Cruise) Control Mode\
.
Push once: On
Push again: Off

47
OVERVIEW
ELECTRIC VEHICLE SYSTEM
FEATURES & OPERATIONS
TOYOTA SAFETY SENSE
SAFETY &
EMERGENCY FEATURES
ADJUSTING DISTANCE
To change the vehicle-to-vehicle distance

Push the “
” button to cycle
through the settings, which will
change progressively.
This mode employs a radar sensor to detect the presence of a preceding v\
ehicle
up to approximately 328 ft (100 m) ahead, determines the current vehicle-to-vehicle
following distance and operates to maintain a preset following distance \
from the
vehicle ahead. These distances vary based on vehicle speed.
Preceding vehicle mark
LONG
(default setting) MIDDLE SHORT
(1) (2) (3)
(1) 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
control.
(2) 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 automaticall\
y
decelerates your vehicle. When a greater reduction in vehicle speed is
necessary, the system applies the brakes (the brake 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. \
A warning
tone warns you when the system cannot decelerate sufficiently to prevent\
your
vehicle from closing in on the vehicle ahead.
Note: Vehicle-to-vehicle distance will close in when traveling on long downhill
slopes.

48
TOYOTA SAFETY SENSE™
SWITCHING TO CONSTANT SPEED (CRUISE) CONTROL MODE
Note: When your vehicle is too close to a vehicle ahead, and sufficient automatic
deceleration via the cruise control is not possible, the display will flash and the
buzzer will sound to alert the driver. An example of this would be if another driver
cuts in front of you while you are following a vehicle. Depress the brake pedal to
ensure an appropriate vehicle-to-vehicle distance.
If you are already using DRCC “”, push ON-OFF button to turn the system off
first, then push and hold ON-OFF button for at least 1.5 seconds to swit\
ch.
Note: When the engine is turned off, it will automatically default to DRCC.
Refer to the Toyota Owner’s Manual for additional information on DRCC\
operation,
settings adjustments, limitations, and precautions before attempting to \
use it.
(3) Acceleration when there are no longer any preceding vehicles driving
slower than the set speed The system accelerates until the set speed is reached. The system then
returns to constant speed cruising.
SETTING CONSTANT SPEED (CRUISE) CONTROL
Refer to the Toyota Owner’s Manual for additional information on DRCC\
operation,
settings adjustments, limitations, and precautions before attempting to \
use it.
Set
To adjust speed or cancel, see steps (2) and (3) of ADJUSTING SET SPEED on
page 46.
DRCC ADJUSTING DISTANCE (CONTINUED)
1.5 seconds