TOYOTA PRIUS PRIME 2018 (in English) Service Manual

39
CHANGING THE 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 first provide an
alert and then automatic braking if needed.In certain conditions, the PCS system included with the TSS-P package may also
help to detect a pedestrian in front of your vehicle. With Toyota Safety Sense™ P,
PCS uses an in-vehicle camera and front-grill mounted millimeter-wave radar to
help detect a pedestrian in front of your vehicle in certain conditions. 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
operating or engaging. Refer to a Toyota Owner’s Manual for additional information.
PEDESTRIAN DETECTION FUNCTION
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40
DISABLING THE 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 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.
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 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.
(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 function (LDA w/SA)
TOYOTA SAFETY SENSE™

41
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 a Toyota Owner’s Manual for additional information on LDA operation,
settings adjustments, limitations, and precautions before attempting to use it.
FUNCTIONS
LDA function display
Steering control indicatorLDA indicator LDA function display
Lane marker
(2) (1) Lane Departure Alert (LDA) indicator flashes orange when operating.
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42 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 driver 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 a Toyota Owner’s Manual for additional information on LDA operation,
settings adjustments, limitations, and precautions before attempting to use it.
CHANGING THE LDA ALERT SENSITIVITY
DISABLING THE STEERING ASSIST FUNCTION
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.
TOYOTA SAFETY SENSE™

43
VEHICLE SWAY WARNING SYSTEM (SWS) FUNCTION
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.
(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.
ADJUSTING SWAY ALERT SENSITIVITY
DISABLING SWS
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44
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 preceding
vehicle is traveling at a lower speed. This mode is always selected first when
the cruise control button is depressed. Constant speed control mode is also
available. Full-Speed Range DRCC is designed to function at speeds between 0 to
approximately 110 MPH and is intended for highway use.
Vehicle will cruise at a set speed, decelerate to maintain selected distance 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 increments).
(3) (1) (2)
Decrease
speedIncrease
speed
Cancel1
Resume2
Set
Display Set speed Full-Speed Range Dynamic Radar Cruise
Control vehicle-to-vehicle distance button
Cruise control switchIndicators
Full-Speed Range
Dynamic Radar Cruise Control (DRCC)
TOYOTA SAFETY SENSE™
Refer to page 46 for switching to Constant Speed (Cruise) Control Mode.
Push once: On
Push again: Off

45
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 vehicle
up to approximately 328 ft (100m) ahead, determines the current vehicle-to-vehicle
following distance and operates to maintain a suitable 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 distance
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 automatically
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.
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46
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 switch.
Note: When the engine is turned off, it will automatically default to DRCC.
Refer to a Toyota Owner’s Manual for additional information on DRCC operation,
settings adjustments, limitations, and precautions before attempting to use it.
1.5 seconds
(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.
TOYOTA SAFETY SENSE™
SETTING CONSTANT SPEED (CRUISE) CONTROL
Refer to a 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 44.
DRCC ADJUSTING DISTANCE (CONTINUED)

47 AHB is a safety system designed to help drivers see more of what’s ahead at
nighttime without dazzling other drivers. When enabled, AHB uses an in-vehicle
camera to help detect the headlights of oncoming vehicles and tail lights of
preceding vehicles, then automatically switches between high and low beams
as appropriate to provide the most light possible and enhance forward visibility.
By using high beams more frequently, the system may allow earlier detection of
pedestrians and obstacles.
Refer to a Toyota Owner’s Manual for additional information on AHB operation,
settings adjustments, limitations, and precautions before attempting to use it.
Automatic High Beams (AHB)
Note: The AHB function only operates at night.
(1) With the engine switch in IGNITION ON mode and headlight switch turned to
“AUTO” or “
” position, push lever away from you.
(2) Depress the Automatic High Beam “
” switch.
The AHB indicator will come on when the headlights are turned on automatically
to indicate that the system is active.
Note: Pull the lever back toward you to turn the AHB system off. The AHB
indicator will turn off and the high beam indicator “
” turns on.
When all of these conditions are met, high beams will be automatically turned on
(after approximately 1 second):
• Vehicle speed is above approximately 21 mph (34 km/h.)
• The area ahead of the vehicle is dark.
• There are no oncoming or preceding vehicles with headlights or tail lights
turned on.
• There are few street lights on the road ahead.
If any of these conditions occur, the system is designed to automatically turn off
high beams:
• Vehicle speed drops below approximately 17 mph (27 km/h.)
• The area ahead of the vehicle is not dark.
• Oncoming or preceding vehicles have headlights or tail lights
turned on.
• There are many streetlights on the road ahead.
ACTIVATING THE AHB SYSTEM
CONDITIONS WHERE AHB WILL TURN ON/OFF AUTOMATICALLY
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48
If the Tire Pressure Warning indicator “” illuminates without blinking, adjust tire
pressures to factory-specified levels.* The light will turn off after a few minutes. The
warning light may come on due to temperature changes or changes in tire pressure
from natural air leakage.
If the tire pressure indicator flashes for more than 60 seconds and then remains on,
take the vehicle to your local Toyota dealer.
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