TOYOTA PRIUS PRIME 2021 (in English) Service Manual
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TOYOTA SAFETY SENSE™
OVERVIEW ELECTRIC VEHICLE SYSTEM FEATURES & OPERATIONS TOYOTA SAFETY SENSE SAFETY &
EMERGENCY FEATURES
Toyota Safety Sense™ 5 4 4
J T B T F U P G B D U J W F T B G F U Z U F D I O P M P H J F T E F T J H O F E
to help mitigate or prevent collisions across a wide range of traffic situations, in
certain conditions. TSS 2.0 is designed to help support the driver’s awareness,
decision making and vehicle operation contributing to a safe driving experience.
5 H I H U W R W K H 2 Z Q H U
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TOYOTA SAFETY SENSE™
Sensors
TSS 2.0 combines a forward-facing camera mounted in front of the inside rear view
mirror and a grille-mounted radar mounted in the front grille. These sensors support the
driver assist systems.
The Pre-Collision System uses a grille-mounted radar and forward-facing camera to
help detect a vehicle or pedestrian or bicyclist in front of your vehicle.
As there is a limit to the degree of recognition accuracy and control performance
that this system can provide, do not overly rely on this system. This system will not
prevent collisions or lessen collision damage or injury in every situation. 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 system 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 sandstorm or while driving
on a curve and for a few seconds after driving on a curve, a vehicle or pedestrian or
bicyclist may not be detected by the grille-mounted radar and forward-facing camera,
preventing the system from operating or engaging properly.
Refer to the Toyota Owner’s Manual for a list of additional situations in which the
system may not operate properly.
Pre-Collision Warning
When the system determines that the possibility of a frontal collision is high, a buzzer
will sound and a warning message will be displayed on the Multi-Information 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 additional braking
force using Brake Assist. This system may prime the brakes and may apply greater
braking force in relation to how strongly the brake pedal is depressed.
Pre-Collision System with
Pedestrian Detection (PCS w/PD)
Forwardfacing camera Grillemounted radar
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Monocular camera sensor
Millimeter
wave radar
OVERVIEW ELECTRIC VEHICLE SYSTEM FEATURES & OPERATIONS TOYOTA SAFETY SENSE SAFETY &
EMERGENCY FEATURES
As part of the Pre-Collision System, this function is also designed to first provide an
alert and then automatic braking if needed.
Refer to the Toyota Owner’s Manual for additional limitations and information.
1 3 & $ 0 - - * 4 * 0 / 4 : 4 5 & . $ 0 / 5 * / 6 & %
Refer to the Toyota Owner’s Manual for additional information on PCS operation,
settings adjustments, limitations, and precautions before attempting to use it. Pre-Collision Braking
If the driver does not brake in a set time and the system determines that 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 help the driver reduce the
impact and in certain cases avoid the collision.
PCS PEDESTRIAN DETECTION
6 O E F S D F S U B J O D P O E J U J P O T
U I F 1 $ 4 T Z T U F N J O D M V E F E X J U I U I F 5 4 4 Q B D L B H F
may also help to detect a pedestrian or bicyclist in front of your vehicle using the
forward-facing camera and front grille-mounted radar. The forward-facing camera
of PCS detects a potential pedestrian or bicyclist based on size, profile, and motion
of the detected pedestrian or bicyclist. However, a pedestrian or bicyclist may not
be detected depending on the conditions, including the surrounding brightness
and the motion, posture, size, and angle of the potential detected pedestrian or
bicyclist, preventing the system from operating or engaging.
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TOYOTA SAFETY SENSE™
CHANGING PRE-COLLISION ALERT TIMING
% * 4 " # - * / ( 1 3 & $ 0 - - * 4 * 0 / 4 : 4 5 & . 1 $ 4
1 S F T T “ ” switches and select “” G S P N U I F . V M U J * O G P S N B U J P O % J T Q M B Z . * %
1 S F T T “
” switches and select “” and then press “.” The setting
screen is displayed.
1 S F T T i
” to select the desired setting. Each time it is pressed, the response to
the PCS warning timing changes as shown above.
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).
Press “
” switches and select “” G S P N U I F . V M U J * O G P S N B U J P O % J T Q M B Z . * %
1 S F T T “
” switches and select “” and then press “.” The setting
screen is displayed.
1 S F T T i
w U P T F M F D U U I F E F T J S F E T F U U J O H 0 / 0 ' '
1 S F T T i
” to go back to the menu.
Note: The system is enabled each time the power switch is turned to ON mode.
Refer to the Toyota Owner’s Manual for additional information on PCS operation,
settings adjustments, limitations, and precautions before attempting to use it.
Far
Middle
(default)
Near
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OVERVIEW ELECTRIC VEHICLE SYSTEM FEATURES & OPERATIONS TOYOTA SAFETY SENSE SAFETY &
EMERGENCY FEATURES
LDA in TSS 2.0 uses a forward-facing camera designed to detect visible white and
yellow lane markers or road edge in front of the vehicle and the vehicle’s position
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.
When the alerts occur, the driver must check the surrounding road situation and
carefully operate the steering wheel to move the vehicle back to the center part of
their lane.
- % " J T E F T J H O F E U P G V O D U J P O B U T Q F F E T P G B Q Q S P Y J N B U F M Z N Q I L N I
P S I J H I F S
on relatively straight roadways.
In addition to the alert function, LDA w/SA also features a steering assist
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 corrective steering
inputs to the steering wheel for a short period of time to help keep the vehicle in its
lane.
If the vehicle repeatedly deviates from the lane, the vehicle drifts within the lane due
to inattention, or the driver abruptly operates the steering wheel after an inattentive
period, when enabled, the vehicle sway warning function alerts the driver with an
audio and visual alert, urging them to take a break.
Lane Departure Alert with Steering Assist
(LDA w/SA)
5 6 3 / * / ( 5 ) & - % " 4 : 4 5 & . 0 / 0 ' '
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.
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TOYOTA SAFETY SENSE™
- " / & % & 1 " 3 5 6 3 & " - & 3 5
LDA function display
Operation display
of steering wheel
operation support
LDA indicator Steering control
indicator and
operation display
(steering assist
function)
Lane markers/road edge
(2) (1) - B O F % F Q B S U V S F " M F S U - % "
J O E J D B U P S G M B T I F T P S B O H F X I F O P Q F S B U J O H
The LDA function “ w E J T Q M B Z T X I F O U I F . V M U J * O G P S N B U J P O % J T Q M B Z . * %
J T
switched to the driving assist system information screen.
5 I F T Z T U F N E J T Q M B Z T T P M J E X I J U F M J O F T P O U I F - % " J O E J D B U P S X I F O W J T J C M F M B O F
markers or the road are detected. A side flashes orange to alert the driver when the
vehicle deviates from its lane.
5 I F T Z T U F N E J T Q M B Z T P V U M J O F T P O U I F - % " J O E J D B U P S X I F O M B O F N B S L F S T P S U I F S P B E
are not detected or the function is temporarily canceled.
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.
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OVERVIEW ELECTRIC VEHICLE SYSTEM FEATURES & OPERATIONS TOYOTA SAFETY SENSE SAFETY &
EMERGENCY FEATURES
" % + 6 4 5 * / ( - % " " - & 3 5 4 & / 4 * 5 * 7 * 5 :
DISABLING STEERING ASSIST
5 I F E S J W F S D B O B E K V T U U I F T F O T J U J W J U Z P G U I F - % " X B S O J O H
G V O D U J P O G S P N U I F
. V M U J * O G P S N B U J P O % J T Q M B Z . * %
D V T U P N J [ B U J P O T D S F F O
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.
Press “
” switches and select “” G S P N U I F . V M U J * O G P S N B U J P O % J T Q M B Z . * %
1 S F T T “
” switches and select the “” and then press “.” The setting
screen is displayed.
Press “
” U P T F M F D U U I F E F T J S F E T F U U J O H ) J H I / P S N B M
1 S F T T i
” to go back to the menu.
Press “
” switches and select “” G S P N U I F . V M U J * O G P S N B U J P O % J T Q M B Z . * %
1 S F T T “
” switches and select the “” and then press “.” The setting
screen is displayed.
Press “
” U P T F M F D U U I F E F T J S F E T F U U J O H 0 / 0 ' '
1 S F T T i
” 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.
4 8 " : 8 " 3 / * / ( 4 : 4 5 & .
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 help 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.
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TOYOTA SAFETY SENSE™
Press “ ” switches and select “” G S P N U I F . V M U J * O G P S N B U J P O % J T Q M B Z . * %
1 S F T T “
” switches and select the “” and then press “.” The setting
screen is displayed.
Press “
” to select the desired setting. Each time it is pressed, the response to
the sway warning timing changes.
1 S F T T i
” to go back to the menu.
Refer to the Toyota Owner’s Manual for additional information on LDA operation,
settings adjustments, limitations, and precautions before attempting to use it.
Press “
” switches and select “” G S P N U I F . V M U J * O G P S N B U J P O % J T Q M B Z . * %
1 S F T T “
” switches and select the “” and then press “.” The setting
screen is displayed.
Press “
” U P T F M F D U U I F E F T J S F E T F U U J O H 0 / 0 ' '
1 S F T T i
” 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.
" % + 6 4 5 * / ( 4 8 " : " - & 3 5 4 & / 4 * 5 * 7 * 5 :
% * 4 " # - * / ( - % " 4 8 " : 8 " 3 / * / ( " - & 3 5
When enabled, the LTA system’s lane centering function is designed to
automatically provide assistance to help keep the vehicle in the center of the lane
when Full-Speed Range DRCC is set.
Lane Tracing Assist (LTA)
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OVERVIEW ELECTRIC VEHICLE SYSTEM FEATURES & OPERATIONS TOYOTA SAFETY SENSE SAFETY &
EMERGENCY FEATURES
5 6 3 / * / ( 5 ) & - 5 " 4 : 4 5 & . 0 / 0 ' '
Press the LTA switch to turn the LTA system on. Depress again to turn it off.
Note: Operation of the LTA 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 LTA operation,
settings adjustments, limitations, and precautions before attempting to use it.
LANE TRACING ASSIST
LTA function display
- B O F 5 S B D J O H " T T J T U - 5 "
J O E J D B U P S G M B T I F T P S B O H F X I F O P Q F S B U J O H
Operation display
of steering wheel
operation support
LTA indicator Steering control
indicator and
operation display
(steering assist
function)
Lane markersFollowup cruising
display
(2) (1)
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TOYOTA SAFETY SENSE™
The LTA function “ w E J T Q M B Z T X I F O U I F . V M U J * O G P S N B U J P O % J T Q M B Z . * %
J T
switched to the driving assist system information screen.
5 I F T Z T U F N E J T Q M B Z T T P M J E X I J U F M J O F T P O U I F - 5 " J O E J D B U P S X I F O W J T J C M F M B O F
markers on the road are detected. A side flashes orange to alert the driver when the
vehicle deviates from its lane.
5 I F T Z T U F N E J T Q M B Z T P V U M J O F T P O U I F - 5 " J O E J D B U P S X I F O M B O F N B S L F S T P O U I F S P B E
are not detected or the function is temporarily canceled.
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, LTA 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 LTA operation,
settings adjustments, limitations, and precautions before attempting to use it.
" % + 6 4 5 * / ( - 5 " " - & 3 5 4 & / 4 * 5 * 7 * 5 :
DISABLING STEERING ASSIST
- " / & 5 3 " $ * / ( " 4 4 * 4 5 $ 0 / 5 * / 6 & %
5 I F E S J W F S D B O B E K V T U U I F T F O T J U J W J U Z P G U I F - 5 " X B S O J O H
G V O D U J P O G S P N U I F
. V M U J * O G P S N B U J P O % J T Q M B Z . * %
D V T U P N J [ B U J P O T D S F F O
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.
Press “
” switches and select “” G S P N U I F . V M U J * O G P S N B U J P O % J T Q M B Z . * %
1 S F T T “
” switches and select the “” and then press “.” The setting
screen is displayed.
Press “
” U P T F M F D U U I F E F T J S F E T F U U J O H 0 / 0 ' '
1 S F T T i
” to go back to the menu.
Note: Operation of the LTA system and setting adjustments continues in the
same condition regardless of Ignition cycle until changed by the driver or the
system is reset.
Press “
” switches and select “” G S P N U I F . V M U J * O G P S N B U J P O % J T Q M B Z . * %
1 S F T T “
” switches and select the “” and then press “.” The setting
screen is displayed.
Press “
” U P T F M F D U U I F E F T J S F E T F U U J O H ) J H I / P S N B M
1 S F T T i
” to go back to the menu.