TOYOTA SIENNA 2019 (in English) Service Manual

39
OVERVIEW
FEATURES & OPERATIONS
TOYOTA SAFETY SENSE
SAFETY & EMERGENCY FEATURES
DISABLING STEERING ASSIST
(1) Press “” switches to find and select .
(2) Press “
or ” switches to find the setting function and then press
“
”. The LDA Steering Assist system will be disabled.
(3) You can 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 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 to find and select .
(2) Press “
or ” switches to find the setting function and then press
“
”. The setting screen is displayed.
(3) Select “Sensitivity” and then press “
.” Each time “” is pressed, the
response to the LDA alert sensitivity changes. You can 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\
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.

40
TOYOTA SAFETY SENSE™
(1) Press “” switches to find and select .
(2) Press “
or ” 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 to find and select .
(2) Press “
or ” 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 LDA SWAY WARNING SYSTEM

41
OVERVIEW
FEATURES & OPERATIONS
TOYOTA SAFETY SENSE
SAFETY & EMERGENCY FEATURES
68°FEx terior68MPH
DRCC helps maintain a pre-set distance to a preceding vehicle when the p\
receding
vehicle is traveling at a lower speed. This mode is always selected firs\
t when the
cruise control button is depressed. Constant speed cruise control mode i\
s also
available.
Dynamic Radar Cruise Control (DRCC)
Set speed
Display
Indicators
Dynamic Radar
Cruise Control
vehicle-to-vehicle
distance button
Cruise control switch
Refer to a Toyota Owner’s Manual for additional information on DRCC o\
peration,
settings adjustments, limitations, and precautions before attempting to \
use it.
ADJUSTING DRCC 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.
Vehicle will cruise at a set speed, decelerate to maintain selected dist\
ance 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 [1.6 km/h] or 1 km/h [0.6 mph] increments).
(3) (2)
Decrease speed Increase
speedCancel1
Resume2
Set
TURNING SYSTEM ON/OFF
(1)
Refer to page 43 for switching to Constant Speed (Cruise) Control Mode\
.
Push once: On
Push again: Off

42
TOYOTA SAFETY SENSE™
ADJUSTING DISTANCE
To change the vehicle-to-vehicle distance

Push the “
” button to cycle
through the settings, which will
change progressively. Preceding vehicle mark
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.
LONG
(default setting)MIDDLE SHORT
(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 vehicle is detected running ahead of you, the system automaticall\
y
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.
(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.
(1) (2) (3)

43
OVERVIEW
FEATURES & OPERATIONS
TOYOTA SAFETY SENSE
SAFETY & EMERGENCY FEATURES
SWITCHING TO CONSTANT SPEED (CRUISE) CONTROL MODE
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 swit\
ch.
Note: When the engine is turned off, it will automatically default to DRCC.
1.5 seconds
SETTING CONSTANT SPEED (CRUISE) CONTROL
Refer to the 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 41.

44
TOYOTA SAFETY SENSE™
Automatic High Beams (AHB)
(1) With the engine switch in IGNITION ON mode and headlight switch turned to “AUTO” position, push lever away from you.
The “
” indicator will come on when the headlights are turned on
automatically to indicate that the system is active.
(2) Pull the lever back toward you to turn the AHB system off.
The “
” will turn off and the “” turns on.
When all of these conditions are met, high beams will be automatically t\
urned on
(after approximately 1 second): • Vehicle speed is above approximately 20 mph (32 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 automaticall\
y turn off
high beams: • Vehicle speed drops below approximately 20 mph (32 km/h).
• The area ahead of the vehicle is not dark.
• Oncoming or preceding vehicles have headlights or tail lightsturned on.
• There are many streetlights on the road ahead.
ACTIVATING THE AHB SYSTEM
CONDITIONS WHERE AHB WILL TURN ON/OFF AUTOMATICALLY
AHB is a safety system designed to help drivers see more of what’s ah\
ead at
nighttime and reduce glare for oncoming 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 vi\
sibility.
By using high beams more frequently, the system may allow earlier detect\
ion of
pedestrians and obstacles.
Refer to the Toyota Owner’s Manual for additional information on AHB \
operation,
settings adjustments, limitations, and precautions before attempting to \
use it.

45
OVERVIEW
FEATURES & OPERATIONS
TOYOTA SAFETY SENSE
SAFETY & EMERGENCY FEATURES
SAFETY & EMERGENCY FEATURES
Rear door child safety locks
Seat belts-Shoulder belt anchor
Child restraint anchors
Moving the lever downward will allow the door to be opened only from the\
outside.
Push up, or squeeze
lock release to lower
Rear door
2nd seat
8 passenger models2nd seat7 passenger models3rd seat
Lock
Unlock

46
SAFETY & EMERGENCY FEATURES
Seat belts
Tire Pressure Monitoring (warning) System (TPMS)
System reset initialization
1. Push and hold “
SET” button until
the indicator blinks three times.
2. Wait a few minutes to allow initialization to complete.
After adjusting tire pressures, or after tires have been rotated or repl\
aced, turn the
ignition switch to “ON” and press and hold the “
SET” button until indicator blinks
three times. Let the vehicle sit for a few minutes to allow initializati\
on to complete.
Refer to the load label on the door jamb or the Owner’s Manual for ti\
re inflation
specifications.
If the tire pressure indicator flashes for more than 60 seconds and then\
remains on,
take the vehicle to your local Toyota dealer.
NOTE: The warning light may come on due to temperature changes or changes
in tire pressure from natural air leakage. If the system has not been initialized
recently, setting the tire pressures to factory specifications should turn off the
light.
Keep as low on
hips as possible
Take up slack
Too high
NOTE: If a passenger’s seat belt is fully extended, then retracted even slightly,
the Automatic locking retractor (ALR) will prevent it from being re-extended
beyond that point, unless fully retracted again. This feature is used to help
hold child restraint systems securely.
To find more information about seat belts, and how to install a child re\
straint
system, refer to the Owner’s Manual.

47
OVERVIEW
FEATURES & OPERATIONS
TOYOTA SAFETY SENSE
SAFETY & EMERGENCY FEATURES
Spare tire & tools
Refer to the Owner’s Manual for jack positioning and tire changing pr\
ocedures. All-Wheel Drive models are equipped with run-flat tires. Refer to the Owner’s
Manual for more details.
Spare tire clamp bolt TurnSocket adapter
Front Wheel Drive models
Tire bag
Jack
Wheel nut wrench
Socket adapter
Tire strap
Jack handle
Spare tire
TOOL & SPARE TIRE LOCATION
REMOVING THE SPARE TIRE

48
SAFETY & EMERGENCY FEATURES
Star Safety System™
VEHICLE STABILITY CONTROL (VSC)
VSC helps prevent loss of traction during cornering by reducing engine p\
ower and
applying brake force to selected wheels.
Toyota’s VSC monitors steering angle and the direction your vehicle i\
s traveling.
When it senses that the front or rear wheels begin to lose traction, VSC\
reduces
engine power and applies braking to selected wheels. This helps restore \
traction
and vehicle control.
ANTI-LOCK BRAKE SYSTEM (ABS)
Toyota’s ABS sensors detect which wheels are locking up and limits wh\
eel lockup
by “pulsing” each wheel’s brakes independently. Pulsing release\
s brake pressure
repeatedly for fractions of a second. This helps the tires attain the tr\
action that
current road conditions will allow, helping you to stay in directional c\
ontrol.
BRAKE ASSIST (BA)
Brake Assist is designed to detect sudden or “panic” braking, and \
then add braking
pressure to help decrease the vehicle’s stopping distance. When there\
’s only a split
second to react, Brake Assist can add additional brake pressure more qui\
ckly than
just the driver alone can.
ELECTRONIC BRAKE FORCE DISTRIBUTION (EBD)
Toyota’s ABS technology has Electronic Brake-force Distribution (EBD) to help
maintain control and balance when braking. EBD responds to sudden stops \
by
redistributing brake force to enhance the braking effectiveness of all f\
our wheels. Your vehicle comes standard standard with the Star Safety System
TM, which
combines Anti-lock Braking System (ABS), Brake Assist (BA), Electronic Brake-force
Distribution (EBD), Smart Stop Technology (SST), Traction Control (TRAC) and
Vehicle Stability Control (VSC).
Refer to the Owner’s Manual for more details and important information on limitations
to these systems.
SMART STOP TECHNOLOGY (SST)
Smart Stop Technology automatically reduces engine power when the accele\
rator
and brake pedals are pressed simultaneously under certain conditions.
SST engages when the accelerator is depressed first and the brakes are a\
pplied
firmly for longer than one-half second at speeds greater than five miles\
per hour.
SST doesn’t engage if the brake pedal is depressed before the acceler\
ator pedal,
allowing vehicles to start on a steep hill and safely accelerate without\
rolling
backward.