
231
4 
4-5. Using the driving support systems
Driving
bled.
●The PCS warning light will turn on and  
“VSC Turned OFF Pre-Collision Brake 
System Unavailable” will be displayed  on the multi-information display.*: If equipped
LTA (Lane Tracing  
Assist)*
When driving on highways and  
freeways with white (yellow) 
lane lines, this function alerts 
the driver when the vehicle 
might depart from its lane or  
course* and provides assis- 
tance by operating the steering 
wheel to keep the vehicle in its  
lane or course*. Furthermore,  
the system provides steering 
assistance when dynamic 
radar cruise control with 
full-speed range is operating to 
keep the vehicle in its lane.
The LTA system recognizes 
white (yellow) la ne lines or a  
course* using the front cam- 
era. Additionally, it detects 
preceding vehicles using the 
front camera and radar.
*: Boundary between asphalt and the  
side of the road, such as grass, 
soil, or a curb 

235
4 
4-5. Using the driving support systems
Driving
the lane. 
Vehicle with BSM: When the system  
determines that the vehicle might 
depart from its lane and that the possi-
bility of a collision with an overtaking 
vehicle in the adjacent lane is high, the 
lane departure alert will operate even if 
the turn signals are operating.
*: Boundary between asphalt and the 
side of the road, such as grass, soil, 
or a curb
■Steering assist function 
When the system de termines that  
the vehicle might depart from its  
lane or course*, the system pro- 
vides assistance as necessary by 
operating the steering wheel in 
small amounts for a short period of 
time to keep the vehicle 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-information dis- 
play and the function is temporarily 
canceled. 
Vehicle with BSM: When the system  
determines that the vehicle might 
depart from its lane and that the possi-
bility of a collision with an overtaking 
vehicle in the adjacent lane is high, the 
steering assist function will operate 
even if the turn signals are operating.
*: Boundary between asphalt and the 
side of the road, such as grass, soil, 
or a curb
■Vehicle sway warning function 
When the vehicle is swaying within  
a lane, the warning buzzer will 
sound and a message will be dis-
played on the multi-information dis-
play to alert the driver. 

2364-5. Using the driving support systems
■Lane centering function 
This function is linked with dynamic  
radar cruise control with full-speed 
range and provides the required 
assistance by operating the steer-
ing wheel to keep the vehicle in its 
current lane.
When dynamic radar cruise control with  
full-speed range is not operating, the 
lane centering function does not oper-
ate. 
In situations where the white (yellow)  
lane lines are difficult to see or are not 
visible, such as when in a traffic jam, 
this function will operate to help follow a 
preceding vehicle by monitoring the 
position of the preceding vehicle. 
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-information dis-
play and the function is temporarily  
canceled.
Press the LTA switch to turn the  
LTA system on.
The LTA indicator illuminates and a  
message is displayed on the multi-infor-
mation display. 
Press the LTA switch again to turn the  
LTA system off. 
When the LTA system is turned on or  
off, operation of the LTA system contin-
ues in the same condition the next time 
the engine is started.
Turning LTA system on 

237
4 
4-5. Using the driving support systems
Driving
LTA i n d i c a t o r
The illumination condition of the indica- 
tor informs the driver of the system  
operation status. 
Illuminated in white: LTA system is  
operating. 
Illuminated in green: Steering wheel  
assistance of the st eering assist func- 
tion or lane centering function is operat-
ing. 
Flashing in orange: Lane departure  
alert function is operating.
Operation display of steering  
wheel operation support
Displayed when the multi-information  
display is switched to the driving sup-
port system info rmation screen. 
Indicates that steering wheel assis- 
tance of the steering assist function or  
lane centering function is operating. 
Both outer sides of the lane are dis- 
played: Indicates that steering wheel 
assist of the lane centering function is 
operating. 
One outer side of the lane is displayed:  
Indicates that steering wheel assist of 
the steering assist function is operating. 
Both outer sides of the lane are flash- 
ing: Alerts the driver that their input is 
necessary to stay in  the center of the  
lane (lane centering function).
Lane departure alert function  
display
Displayed when the multi-information  
display is switched to the driving sup-
port system information screen.
Inside of displayed lines is white 
Indicates that the system is recog- 
nizing white (yellow) lines or a  
course*. When the vehicle departs  
from its lane, the white line dis-
played on the side the vehicle 
departs from flashes orange.
Indications on multi-infor- 
mation display 

2384-5. Using the driving support systems
Inside of displayed lines is black 
Indicates that the system is not able  
to recognize white  (yellow) lines or  
a course* or is temporarily 
canceled.
*: Boundary between asphalt and the  
side of the road, such as grass, soil, 
or a curb
Follow-up cruising display
Displayed when the multi-information 
display is switched to the driving sup-
port system info rmation screen. 
Indicates that steering assist of the lane  
centering function is operating by moni-
toring the position of a preceding vehi-
cle. 
When the follow-up cruising display is  
displayed, if the preceding vehicle 
moves, your vehicle may move in the 
same way. Always pay careful attention 
to your surroundings and operate the 
steering wheel as necessary to correct 
the path of the vehicle and ensure 
safety.
■Operation conditions of each func- 
tion
●Lane departure alert function 
This function operates when all of the  
following conditions are met.
• LTA is turned on. • Vehicle speed is approximately 50  
km/h (32 mph) or more.*1
• System recognizes white (yellow) lane  
lines or a course*2. (When a white  
[yellow] line or course*2 is recognized  
on only one side, the system will oper- ate only for the recognized side.) 
• Width of traffic lane is approximately 3 
m (9.8 ft.) or more. • Turn signal lever is not operated. 
(Vehicle with BSM: Except when  
another vehicle is in the lane on the 
side where the turn signal was oper-
ated)
• Vehicle is not being driven around a  
sharp curve. • No system malfunctio ns are detected.  
( P.240)*1: The function operates even if the  
vehicle speed is less than approxi-
mately 50 km/h (32 mph) when the 
lane centering function is operating.
*2: Boundary between asphalt and the 
side of the road, such as grass, soil, 
or a curb
●Steering assist function 
This function operates when all of the  
following conditions are met in addition 
to the operation conditions for the lane 
departure alert function. 
• Setting for “Steering Assist” in   of  
the multi-information display is set to  “ON”. ( P.577) 
• Vehicle is not accelerated or deceler-
ated by a fixed amount or more. • Steering wheel is not operated with a  
steering force level suitable for chang-
ing lanes.
• ABS, VSC, TRC and PCS are not  operating. 
• TRC or VSC is not turned off.
• Hands off steering wheel warning is  not displayed. ( P.239)
●Vehicle sway warning function 
This function operates when all of the  
following conditions are met. 

239
4 
4-5. Using the driving support systems
Driving
• Setting for “Sway Warning” in   of  
the multi-information display is set to  “ON”. ( P.577) 
• 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.240)
●Lane centering function 
This function operates when all of the  
following conditions are met.
• LTA is turned on. 
• Setting for “Steering Assist” and “Lane  
Centre” in   of th e multi-information  
display are set to “ON” ( P.577) 
• This function recognizes white (yel-
low) lane lines or the position of a  preceding vehicle (except when the  
preceding vehicle is small, such as a 
motorcycle). • The dynamic radar cruise control with  
full-speed range is operating in vehi-
cle-to-vehicle distance control mode. • Width of traffic lane is approximately 3  
to 4 m (10 to 13 ft.).
• Turn signal lever is not operated. • Vehicle is not being driven around a  
sharp curve.
• No system malfunctions are detected.  ( P.240) 
• Vehicle does not accelerate or 
decelerate by a fixed amount or more. • Steering wheel is not operated with a  
steering force level suitable for chang-
ing lanes.
• ABS, VSC, TRC and PCS are not  operating. 
• TRC or VSC is not turned off.
• Hands off steering wheel warning is  not displayed. ( P.239) 
• The vehicle is being driven in the 
center of a lane. • Steering assist function is not operat- 
ing.
■Temporary cancellation of func-
tions
●When operation conditions are no 
longer met, a function may be tempo- 
rarily canceled. However, when the  
operation conditions are met again,  operation of the function is automati- 
cally restored. ( P.238)
●If the operation conditions (P.238)  
are no longer met while the lane cen-
tering function is operating, the buzzer  may sound to indicate that the func- 
tion has been temporarily canceled.
■Steering assist function/lane cen-
tering function
●Depending on the vehicle speed, lane 
departure situation, road conditions,  etc., the driver may not feel the func- 
tion is operating or the function may 
not operate at all.
●The steering control of the function is 
overridden by the driver’s steering  wheel operation.
●Do not attempt to test the operation of the steering assist function.
■Lane departure alert function
●The warning buzzer may be difficult to hear due to external noise, audio play- 
back, etc.
●If the edge of the course* is not clear  
or straight, the lane departure alert  
function may not operate.
●Vehicle with BSM: It may not be possi-
ble for the system to determine if there  is a danger of a collision with a vehicle  
in an adjacent lane.
●Do not attempt to test the operation of 
the lane departure alert function.*: Boundary between asphalt and the  
side of the road, such as grass, soil, 
or a curb
■Hands off steering wheel warning 
In the following situations, a warning  message urging the driver to hold the  
steering wheel and the symbol shown in 
the illustration are displayed on the  multi-information display to warn the  
driver. The warning stops when the sys-
tem determines that the driver holds the  steering wheel. Always keep your hands  

2404-5. Using the driving support systems 
on the steering wheel when using this  
system, regardless of warnings.
●When the system determines that the 
driver is driving without holding the  steering wheel whil e the system is  
operating 
If the driver continues to keep their  
hands off of the steering wheel, the 
buzzer sounds, the driver is warned and  the function is temporarily canceled.  
This warning also operates in the same 
way when the driver continuously oper- ates the steering wheel only a small  
amount.
●When the system determines that the 
vehicle may not turn and instead 
depart from its lane while driving  around a curve 
Depending on the vehicle condition and  road conditions, the warning may not  
operate. Also,  if  the system determines  
that the vehicle is driving around a  curve, warnings will  occur earlier than  
during straight-lane driving.
●When the system determines that the 
driver is driving without holding the 
steering wheel while the steering  wheel assist of the steering assist  
function is operating. 
If the driver continues to keep their  
hands off of the steering wheel and the 
steering wheel assist is operating, the  buzzer sounds and the driver is warned.  
Each time the buzzer sounds, the con-
tinuing time of the buzzer becomes 
longer.
■Vehicle sway warning function 
When the system dete rmines that the  
vehicle is swaying while the vehicle 
sway warning function is operating, a  
buzzer sounds and a warning message  
urging the driver to rest and the symbol  shown in the illustration are simultane- 
ously displayed on the multi-information 
display. 
Depending on the vehicle and road con- 
ditions, the warning may not operate.
■Warning message 
If the following warning message is dis- 
played on the multi-information display 
and the LTA indicator illuminates in  orange, follow the appropriate trouble- 
shooting procedure. Also, if a different 
warning message is displayed, follow  the instructions displayed on the screen.
●“LTA Malfunction Visit Your Dealer” 
The system may not be operating prop- 
erly. Have the vehicle inspected by any  authorized Toyota retailer or Toyota  
authorized repairer, or any reliable 
repairer.
●“LTA Unavailable” 
The system is temporarily canceled due  
to a malfunction in a sensor other than 
the front camera. Turn the LTA system  off, wait for a little while, and then turn  
the LTA system back on.
●“LTA Unavailable at Current Speed” 
The function cannot be used as the  vehicle speed exceeds the LTA opera- 
tion range. Drive slower.
■Customization 
Function settings can be changed.  
( P.577) 

2444-5. Using the driving support systems 
vehicle in the adjacent lane is high, the  
lane departure alert will operate even if 
the turn signals are operating.
*: Boundary between asphalt and the 
side of the road, such as grass, soil, 
or a curb
■Steering assist function 
When the system de termines that  
the vehicle might depart from its  
lane or course*, the system pro- 
vides assistance as necessary by 
operating the steering wheel in 
small amounts for a short period of 
time to keep the vehicle 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-information dis-
play and the function is temporarily 
canceled. 
Vehicle with BSM: When the system  
determines that the vehicle might  
depart from its lane and that the possi- 
bility of a collision with an overtaking 
vehicle in the adjacent lane is high, the 
steering assist function will operate 
even if the turn signals are operating.
*: Boundary between asphalt and the 
side of the road, such as grass, soil, 
or a curb
■Vehicle sway warning function 
When the vehicle is swaying within  
a lane, the warning buzzer will 
sound and a message will be dis-
played on the multi-information dis-
play to alert the driver.