TOYOTA SIENNA HYBRID 2021 (in English) Workshop Manual

49
OVERVIEW
FEATURES & OPERATIONS
TOYOTA SAFETY SENSE
SAFETY & EMERGENCY FEATURES
By detecting visible white/yellow lane markings or the road’s edge at\
speeds above
32 mph, Lane Departure Alert with Steering Assist (LDA w/SA) is design\
ed to issue
a visual alert and audio or steering vibration alert if an inadvertent l\
ane departure is
detected. If the driver does not take corrective action, the Steering As\
sist function is
designed to provide gentle corrective steering.*
* See www.toyota.com/safety-sense for more information.
Refer to the Toyota Owner’s Manual for a list of additional situation\
s in which the
system operation may be limited.
Lane Departure Alert with Steering Assist
(LDA w/SA)
Press the LDA switch to turn the LDA system on. Depress again to turn it\
off.
Note: The system will continue in the last state it was in (ON or OFF) when the
vehicle is started again.
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
(2)
(1)
Lane Departure Alert (LDA) indicator flashes orange when operating.
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 vi\
sible lane markers or 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 marker\
s or the road 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.
Operation display
of steering wheel
operation support LDA indicator
Lane markers/road edge
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50
TOYOTA SAFETY SENSE™
DISABLING STEERING ASSIST
(1) Press “” or “” switches and select “” from the Multi-Information Display
(MID).
(2) Press “
or ” switches and select “ (LDA)” and then press “.” The
setting screen is displayed.
(3) Press “
or ” switches and select “Steering Assist” and then press “” to
select the desired 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 LDA ALERT SENSITIVITY
The driver can adjust the sensitivity of the LDA (warning) function fr\
om 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 “
” or “” switches and select “” from the Multi-Information Display
(MID).
(2) Press “
or ” switches and select “ (LDA)” and then press “.” The
setting screen is displayed.
(3) Press “
or ” switches and select “Sensitivity” and then press “” to select
the desired 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
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\
display
on the MID.
ADJUSTING SWAY ALERT SENSITIVITY
DISABLING LDA SWAY WARNING ALERT
(1) Press “” or “ ” switches and select “” from the Multi-Information Display
(MID).
(2) Press “ or
” switches and select “
(LDA)” and then press “.” The
setting screen is displayed.
(3) Press “ or
” switches and select “Sway Sensitivity” and then press “
” to
select the desired setting.
(4) Press “
” 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.
(1) Press

51
OVERVIEW
FEATURES & OPERATIONS
TOYOTA SAFETY SENSE
SAFETY & EMERGENCY FEATURES
(1) Press “” or “ ” switches and select “” from the Multi-Information Display
(MID).
(2) Press “ or
” switches and select “
(LDA)” and then press “.” The
setting screen is displayed.
(3) Press “ or
” switches and select “Steering Assist” and then press “
” to
select the desired 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.
The driver can adjust the sensitivity of the LDA (warning) function fr\
om 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 “
” or “ ” switches and select “
” from the Multi-Information Display
(MID).
(2) Press “ or
” switches and select “
(LDA)” and then press “.” The
setting screen is displayed.
(3) Press “ or
” switches and select “Sensitivity” and then press “
” to select
the desired 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
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\
display
on 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.
ADJUSTING SWAY ALERT SENSITIVITY
DISABLING LDA SWAY WARNING ALERT
(1) Press “” or “” switches and select “” from the Multi-Information Display
(MID).
(2) Press “
or ” switches and select “ (LDA)” and then press “.” The
setting screen is displayed.
(3) Press “
or ” switches and select “Sway Sensitivity” and then press “” to
select the desired setting.
(4) Press “
” 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. (1) Press “
” or “” switches and select “” from the Multi-Information Display
(MID).
(2) Press “
or ” switches and select “ (LDA)” and then press “.” The
setting screen is displayed.
(3) Press “
or ” switches and select “Sway Warning” and then press “” to
select the desired 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.
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52
TOYOTA SAFETY SENSE™
When Full-Speed Range Dynamic Radar Cruise Control (DRCC) is enabled a\
nd
lane markers are detectable, Lane Tracing Assist (LTA) uses the lines \
on the road
and/or preceding vehicles to help keep the vehicle centered in its lane.\

See www.toyota.com/safety-sense for model applicability.
Refer to the Toyota Owner’s Manual for a list of additional situation\
s in which the
system operation may be limited.
Lane Tracing Assist (LTA)
TURNING THE LTA SYSTEM ON/OFF
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(1)
Lane Tracing Assist (LTA) indicator flashes orange when operating.
The LTA 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 LTA indicator when vi\
sible 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 LTA indicator when lane marker\
s on the road 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.
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53
OVERVIEW
FEATURES & OPERATIONS
TOYOTA SAFETY SENSE
SAFETY & EMERGENCY FEATURES
When Full-Speed Range Dynamic Radar Cruise Control (DRCC) is enabled a\
nd
lane markers are detectable, Lane Tracing Assist (LTA) uses the lines \
on the road
and/or preceding vehicles to help keep the vehicle centered in its lane.\

See www.toyota.com/safety-sense for model applicability.
Refer to the Toyota Owner’s Manual for a list of additional situation\
s in which the
system operation may be limited.
Lane Tracing Assist (LTA)
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
Operation display
of steering wheel
operation support Follow-up
cruising display
LTA indicator
Lane markers
(2)
(1)
Lane Tracing Assist (LTA) indicator flashes orange when operating.
The LTA 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 LTA indicator when vi\
sible 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 LTA indicator when lane marker\
s on the road 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.
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54
TOYOTA SAFETY SENSE™
DISABLING STEERING ASSIST
(1) Press “” or “” switches and select “” from the Multi-Information Display
(MID).
(2) Press “
or ” switches and select “ (LTA)” and then press “.” The
setting screen is displayed.
(3) Press “
or ” switches and select “Steering Assist” and then press “” to
select the desired setting.
(4) Press “
” 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.
ADJUSTING LTA ALERT SENSITIVITY
The driver can adjust the sensitivity of the LTA (warning) function fr\
om 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 “
” or “” switches and select “” from the Multi-Information Display
(MID).
(2) Press “
or ” switches and select “ (LTA)” and then press “.” The
setting screen is displayed.
(3) Press “
or ” switches and select “Sensitivity” and then press “” to select
the desired setting.
(4) Press “
” to go back to the menu.
LANE CENTERING
The lane centering function is linked with Full-Speed Range Dynamic Rada\
r Cruise
Control (DRCC) and provides the required assistance by operating the s\
teering
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 operate.
(1) Press “” or “ ” switches and select “” from the Multi-Information Display
(MID).
(2) Press “ or
” switches and select “
(LTA)” and then press “.” The
setting screen is displayed.
(3) Press “ or
” switches and select “Lane Center” and then press “
” to
select the desired setting.
(4) Press “
” 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.
Refer to the Toyota Owner’s Manual for additional information on LTA \
operation,
settings adjustments, limitations, and precautions before attempting to \
use it.
DISABLING LANE CENTERING FUNCTION
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55
OVERVIEW
FEATURES & OPERATIONS
TOYOTA SAFETY SENSE
SAFETY & EMERGENCY FEATURES
(1) Press “” or “ ” switches and select “” from the Multi-Information Display
(MID).
(2) Press “ or
” switches and select “
(LTA)” and then press “.” The
setting screen is displayed.
(3) Press “ or
” switches and select “Steering Assist” and then press “
” to
select the desired setting.
(4) Press “
” 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.
The driver can adjust the sensitivity of the LTA (warning) function fr\
om 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 “
” or “ ” switches and select “
” from the Multi-Information Display
(MID).
(2) Press “ or
” switches and select “
(LTA)” and then press “.” The
setting screen is displayed.
(3) Press “ or
” switches and select “Sensitivity” and then press “
” to select
the desired setting.
(4) Press “
” to go back to the menu.
LANE CENTERING
The lane centering function is linked with Full-Speed Range Dynamic Rada\
r Cruise
Control (DRCC) and provides the required assistance by operating the s\
teering
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 operate.
(1) Press “
” or “” switches and select “” from the Multi-Information Display
(MID).
(2) Press “
or ” switches and select “ (LTA)” and then press “.” The
setting screen is displayed.
(3) Press “
or ” switches and select “Lane Center” and then press “” to
select the desired setting.
(4) Press “
” 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.
Refer to the Toyota Owner’s Manual for additional information on LTA \
operation,
settings adjustments, limitations, and precautions before attempting to \
use it.
DISABLING LANE CENTERING FUNCTION
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56
TOYOTA SAFETY SENSE™
Full-Speed Range Dynamic Radar Cruise
Control (DRCC)
Intended for highway use, Full-Speed Range Dynamic Radar Cruise Control \
(DRCC) lets you drive at a preset speed. The system is designed to fun\
ction
between 0-110 mph* and uses vehicle-to-vehicle distance control, helping\
maintain
a preset distance from the vehicle ahead of you.*
* See www.toyota.com/safety-sense for more information.
Refer to the Toyota Owner’s Manual for a list of additional situation\
s in which the
system operation may be limited.
ADJUSTING DRCC SET SPEED
TURNING SYSTEM ON/OFF
Refer to page 58 for switching to Constant Speed (Cruise) Control Mode\
.
Multi-information
displaySet speed
Full-Speed Range
Dynamic Radar Cruise
Control vehicle-to-
vehicle distance button
Cruise control
switches
Indicators
(1)
Push once: On
Push twice: Off
(2) (3) Increase speed/
Resume
Set/
Decrease speedCancel*
Vehicle will cruise at a set speed, decelerate to maintain a selected di\
stance 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 “
” to turn DRCC system ON. The “RADAR READY” and “”
indicator will come on.
(2)

Use the steering wheel controls to increase speed by pushing

“+RES” or
decrease the speed by pushing “-SET.” Push and hold to make a large
adjustment or push each time to make fine adjustments (1 mph [1.6 km/h]\
or 1
km/h [0.6 mph] increments.)
(3) Push “Cancel” to cancel the speed control.
* The speed control may also be canceled by depressing the brake pedal.
ADJUSTING DISTANCE
This mode employs a radar sensor to detect the presence of vehicles up t\
o
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.
Note: Vehicle-to-vehicle distance will close in when traveling on long downhill
slopes.
(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 slower vehicle is detected running ahead of you, the system
automatically decelerates your vehicle. When a greater reduction in vehi\
cle
speed is necessary, the system may apply the brakes (the brake lights w\
ill
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 b\
y the
driver. A warning tone warns you when the system cannot decelerate suffi\
ciently
to prevent your vehicle from closing in on the vehicle ahead.
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57
OVERVIEW
FEATURES & OPERATIONS
TOYOTA SAFETY SENSE
SAFETY & EMERGENCY FEATURES
Full-Speed Range Dynamic Radar Cruise
Control (DRCC)
Intended for highway use, Full-Speed Range Dynamic Radar Cruise Control \
(DRCC) lets you drive at a preset speed. The system is designed to fun\
ction
between 0-110 mph* and uses vehicle-to-vehicle distance control, helping\
maintain
a preset distance from the vehicle ahead of you.*
* See www.toyota.com/safety-sense for more information.
Refer to the Toyota Owner’s Manual for a list of additional situation\
s in which the
system operation may be limited.
Refer to page 58 for switching to Constant Speed (Cruise) Control Mode\
.
Full-Speed Range
Dynamic Radar Cruise
Control vehicle-to-
vehicle distance button
Vehicle will cruise at a set speed, decelerate to maintain a selected di\
stance 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 “
” to turn DRCC system ON. The “RADAR READY” and “”
indicator will come on.
(2) Use the steering wheel controls to increase speed by pushing “+RES” or
decrease the speed by pushing “-SET.” Push and hold to make a large
adjustment or push each time to make fine adjustments (1 mph [1.6 km/h]\
or 1
km/h [0.6 mph] increments.)
(3) Push “Cancel” to cancel the speed control.
* The speed control may also be canceled by depressing the brake pedal.
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 vehicles up t\
o
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.
Note: Vehicle-to-vehicle distance will close in when traveling on long downhill
slopes.
(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) Dece

leration cruising and follow-up cruising when a preceding vehicle


driving

slower than the set speed appears
When a slower vehicle is detected running ahead of you, the system
automatically decelerates your vehicle. When a greater reduction in vehi\
cle
speed is necessary, the system may apply the brakes (the brake lights w\
ill
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 b\
y the
driver. A warning tone warns you when the system cannot decelerate suffi\
ciently
to prevent your vehicle from closing in on the vehicle ahead.
LONG
(default setting) MEDIUM
SHORT
Preceding vehicle
mark
(1) (2) (3)
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58
TOYOTA SAFETY SENSE™
SWITCHING TO CONSTANT SPEED (CRUISE) CONTROL MODE
If you are already using DRCC, push “” button to turn the system off first, then
push and hold the button for at least 1.5 seconds to switch.
Note: When the vehicle is turned off, it will automatically default to DRCC.
1.5 seconds
SETTING CONSTANT SPEED (CRUISE) CONTROL
Set
To adjust speed or cancel, see steps (2) and (3) of ADJUSTING SET SPEED on
page 56.
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.
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.
ADJUSTING DISTANCE (CONTINUED)
When all of the following conditions are met, the high beams will be aut\
omatically
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 the following conditions occur, the high beams will be automat\
ically turned off: • 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 turne\
d on.
• There are many streetlights on the road ahead.
ACTIVATING THE AHB SYSTEM
CONDITIONS WHERE AHB WILL TURN ON/OFF AUTOMATICALLY
The Automatic High Beams (AHB) safety system is designed to help you s\
ee
more clearly at night. At speeds above 25 mph, AHB can detect the headli\
ghts of
oncoming vehicles and taillights of preceding vehicles, then automatical\
ly toggles
between high and low beams accordingly.
See www.toyota.com/safety-sense for more information.
Refer to the Toyota Owner’s Manual for a list of additional situation\
s in which the
system operation may be limited.
(1) Press the