2018 TOYOTA PRIUS PLUG-IN HYBRID lane assist

4085-5. Using the driving support systems
PRIUS PHV_OM_OM47C99E_(EE)
◆Steering control function
When the system determines
that the vehicle might depart
from its lane, the system pro-
vides assistance as necessary
by operating the steering wheel
in small amounts for a short
period of time to keep the vehi-
cle in its lane.
If the system detects that the
steering wheel has not been
operated for a fixed amount of
time or the steering wheel is not
being firmly gripped, a warning
is displayed on the multi-infor-
mation display and the function
is temporarily canceled.
◆Vehicle sway warning function
When the vehicle is swaying or
appears as if it may depart from
its lane multiple times, the
warning buzzer sounds and a
message is displayed on the
multi-information display to alert
the driver.

4115-5. Using the driving support systems
PRIUS PHV_OM_OM47C99E_(EE)
5
Driving
LDA indicator
Illuminates when the LDA sys-
tem is on.
Steering control indicator and
operation display of steering
wheel operation support
When that steering wheel
assistance of the steering con-
trol function is operating, the
indicator illuminates and the
operation display on the multi-
information display is turned on.
Lane departure alert function display
Displayed when the multi-information display is switched to the
screen. (P. 249)
Indications on combination meter
1
2
3
Inside of displayed white lines
is whiteInside of displayed white lines
is black
Indicates that the system is recog-
nizing white (yellow) lines. When
the vehicle departs from its lane,
the white line displayed on the
side the vehicle departs from
flashes orange.Indicates that the system is not
able to recognize white (yellow)
lines or is temporarily canceled.

4125-5. Using the driving support systems
PRIUS PHV_OM_OM47C99E_(EE)
■Operation conditions of each function
●Lane departure alert function
This function operates when all of the following conditions are met.
• LDA is turned on.
• Vehicle speed is approximately 50 km/h (32 mph) or more.
• System recognizes white (yellow) lines.
• Width of traffic lane is approximately 3 m (9.8 ft.) or more.
• Turn signal lever is not operated.
• Vehicle is driven on a straight road or around a gentle curve with a radius
of more than approximately 150 m (492 ft.).
• No system malfunctions are detected. (P. 415)
●Steering control function
This function operates when all of the following conditions are met in addi-
tion to the operation conditions for the lane departure alert function.
• Setting for (“LDA Steering Assist Mode”) in the screen of
the multi-information display is set to “On”. (P. 250)
• Vehicle is not accelerated or decelerated by a fixed amount or more.
• Steering wheel is not operated with a steering force level suitable for
changing lanes.
• ABS, VSC, TRC and PCS are not operating.
• TRC or VSC is not turned off.
• Hands off steering wheel alert is not displayed. (P. 413)
●Vehicle sway warning function
This function operates when all of the following conditions are met.
• Setting for (“Lane Sway Warning Status”) in the screen of
the multi-information display is set to “On”. (P. 250)
• Vehicle speed is approximately 50 km/h (32 mph) or more.
• Width of traffic lane is approximately 3 m (9.8 ft.) or more.
• No system malfunctions are detected. (P. 415)

4165-5. Using the driving support systems
PRIUS PHV_OM_OM47C99E_(EE)If a different warning message is displayed, follow the instructions displayed
on the screen.
■Other indicators
If the following indicators are displayed on the multi-information display, fol-
low the appropriate procedure.
■Customization
The following settings can be changed.
For how to change settings, refer to P. 250.
“Lane Departure Alert
System is Unavailable
Below Approx.
50 km/h.”The LDA system cannot be used as
the vehicle speed is less than approxi-
mately 50 km/h (32 mph).
Drive the vehicle at approximately
50 km/h (32 mph) or more.
Warning messageDetails/Actions
IndicatorDetails/Actions
Indicates that the LDA system has determined that the
driver does not have the hands on the steering wheel
while the steering control function is on
Firmly hold the steering wheel.
Indicates that the LDA system has determined that the
vehicle is swaying
Immediately take a break if you feel tired while driving.
FunctionSetting details
Lane departure alert functionAdjust alert sensitivity
Steering control functionTurn steering wheel assistance on and off
Vehicle sway warning functionTurn function on and off
Adjust alert sensitivity

4425-5. Using the driving support systems
PRIUS PHV_OM_OM47C99E_(EE)
BSM (Blind Spot Monitor)
The Blind Spot Monitor is a system that has 2 functions;
●The Blind Spot Monitor function
Assists the driver in making the decision when changing lanes
●The Rear Crossing Traffic Alert function
Assists the driver when backing up
These functions use same sensors.
Outside rear view mirror indicators
Blind Spot Monitor function:
When a vehicle is detected in the blind spot, the outside rear view mirror
indicator comes on while the turn signal lever is not operated. If the turn
signal lever is operated toward the detected side, the outside rear view
mirror indicator flashes.
Rear Crossing Traffic Alert function:
When a vehicle approaching from the right or left rear of the vehicle is
detected, the outside rear view mirror indicators flash.
: If equipped
Summary of the Blind Spot Monitor
1

5235-5. Using the driving support systems
PRIUS PHV_OM_OM47C99E_(EE)
5
Driving
WARNING
■The ABS does not operate effectively when
● The limits of tire gripping performance have been exceeded (such as
excessively worn tires on a snow covered road).
● The vehicle hydroplanes while driving at high speed on wet or slick road.
■ Stopping distance when the ABS is operating may exceed that of nor-
mal conditions
The ABS is not designed to shorten t he vehicle’s stopping distance. Always
maintain a safe distance from the vehicle in front of you, especially in the
following situations:
● When driving on dirt, gravel or snow-covered roads
● When driving with tire chains
● When driving over bumps in the road
● When driving over roads with potholes or uneven surfaces
■ TRC/VSC may not operate effectively when
Directional control and power may not be achievable while driving on slip-
pery road surfaces, even if the TRC/VSC systems are operating. Drive the
vehicle carefully in conditions where stability and power may be lost.
■ Hill-start assist control does not operate effectively when
● Do not overly rely on hill-start assist control. Hill-start assist control may
not operate effectively on steep inclines and roads covered with ice.
● Unlike the parking brake, hill-start assist control is not intended to hold the
vehicle stationary for an extended period of time. Do not attempt to use
hill-start assist control to hold the vehicle on an incline, as doing so may
lead to an accident.
■ When the TRC, VSC and/or ABS is activated
The slip indicator light flashes. Always drive carefully. Reckless driving may
cause an accident. Exercise particular care when the indicator light flashes.

757Alphabetical index
PRIUS PHV_OM_OM47C99E_(EE)
Child-protectors ....................... 280
Cleaning............................ 572, 577
Aluminum wheels .................. 573
Camera sensor ..................... 387
Exterior.................................. 572
Interior ................................... 577
Radar sensor ........................ 386
Seat belts .............................. 580
Water-repellent coating ......... 573
Clock ......................................... 198
Adjustment ............................ 204
Coat hooks ............................... 569
Combination meter .................. 198
Clock adjustment .................. 204
Main display .......................... 215
Multi-information display ....... 223
Warning lights and
indicators ............................ 207
Condenser ................................ 598
Console box ............................. 552
Consumption screen ............... 268
Coolant ..................................... 596
Capacity ................................ 732
Checking ............................... 596
Preparing and checking
before winter....................... 525
Cooling system ........................ 596
Engine overheating ............... 718
Hybrid system overheating ... 720
Cruise control .......................... 422
Dynamic radar cruise
control with full-speed
range .................................. 422
Cup holders .............................. 553
Curtain shield airbags ............... 39
Customizable features ............ 738Daytime running light
system .................................... 366
Deck board ............................... 556
Defogger
Outside rear view mirrors...... 535
Rear window ......................... 535
Windshield ............................ 535
Dimension ................................ 726
Display
BSM (Blind Spot Monitor) ..... 442
Drive information................... 225
Dynamic radar cruise
control with full-speed
range .................................. 422
Energy monitor ............. 226, 265
Head-up display .................... 257
Intelligent Clearance
Sonar.................................. 476
LDA (Lane Departure Alert
with steering control) .......... 411
Main display .......................... 215
Multi-information display ....... 223
Pre-crash warning................. 395
RSA (Road Sign Assist)........ 418
S-IPA (Simple Intelligent
Parking Assist System) ...... 487
Toyota parking assist
sensor................................. 460
Warning messages ............... 680
Do-it-yourself maintenance .... 586
Door courtesy lights................ 548
Location ................................ 548
Wattage ................................ 735D

763Alphabetical index
PRIUS PHV_OM_OM47C99E_(EE)
Main display ............................. 215
Maintenance
Do-it-yourself maintenance ... 586
Maintenance data ................. 726
Maintenance requirements ... 583
Malfunction indicator lamp ..... 672
Master warning light ................ 680
Meter ......................................... 198
Clock adjustment .................. 204
Combination meter................ 198
Head-up display .................... 257
Indicators .............................. 209
Instrument cluster light
control................................. 200
Main display .......................... 215
Multi-information display ....... 223
Warning lights ....................... 208
Warning messages ............... 680
Microphone
*
Mirrors
Inside rear view mirror .......... 326
Outside rear view mirror
defoggers............................ 535
Outside rear view mirrors ...... 328
Vanity mirrors ........................ 561Multi-information display ........ 223
Air conditioning system
settings screen ................... 245
Audio system-linked
display ................................ 244
BSM (Blind Spot Monitor) ..... 442
Display contents ................... 223
Drive information................... 225
Driving assist system
information.......................... 249
Dynamic radar cruise control
with full-speed range .......... 422
Energy monitor ..................... 226
Intelligent Clearance
Sonar.................................. 476
Language .............................. 253
LDA (Lane Departure Alert
with steering control) .......... 411
Pre-crash warning................. 395
RSA (Road Sign Assist)........ 418
S-IPA (Simple Intelligent
Parking Assist System) ...... 487
Settings ................................. 250
Toyota parking assist
sensor................................. 460
Warning message ................. 249
M
*: Refer to the “Navigation system Owner’s manual”.