2012 TOYOTA SIENNA Owners Manual

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When driving
SIENNA_U (OM45477U)
CAUTION
■To avoid operating the cruise control by mistake
Switch the cruise control off using the “ON-OFF” button when not in use.
■ Situations unsuitable for cruise control
Do not use cruise control in any of the following situations.
Doing so may result in loss of control and could cause an accident resulting
in death or serious injury.
● In heavy traffic
● On roads with sharp bends
● On winding roads
● On slippery roads, such as those covered with rain, ice or snow
● On steep hills
Vehicle speed may exceed the set speed when driving down a steep hill.
● When your vehicle is towing a trailer or during emergency towing

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Dynamic radar cruise control
: If equipped
Dynamic radar cruise control supplements conventional cruise con-
trol with a vehicle-to-vehicle dist ance control. In vehicle-to-vehicle
distance control mode, the vehicle automatically accelerates or
decelerates in order to maintain a set following distance from vehi-
cles ahead.
Display
Set speed
Indicators
Vehicle-to-vehicle distance
button
Cruise control switch

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When driving
SIENNA_U (OM45477U)
■Setting the vehicle speed (vehicle-to-vehicle distance con-
trol mode)
Press the “ON-OFF” button to
activate the cruise control.
Dynamic radar cruise control
indicator will come on.
Press the button again to
deactivate the cruise control.
Accelerate or decelerate to
the desired speed and push
the lever down to set the
speed.
The vehicle speed at the
moment the lever is released
becomes the set speed.
STEP1
STEP2

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SIENNA_U (OM45477U)
■Adjusting the set speed
To change the set speed, operate the lever until the desired set
speed is displayed.
Increases the speed
Decreases the speed
Fine adjustment: Momentarily
move the lever in the desired
direction.
Large adjustment: Hold the
lever in the desired direction.
In the vehicle-to-vehicle distance control mode, the set speed
will be increased or decreased as follows:
• When the set speed is shown in “MPH”Fine adjustment: By approximately 1 mph (1.6 km/h) each
time the lever is operated
Large adjustment: By approximat ely 5 mph (8 km/h) for each
0.75 seconds the lever is held
• When the set speed is shown in “km/h” Fine adjustment: By approximately 0.6 mph (1 km/h) each
time the lever is operated
Large adjustment: By approximately 3.1 mph (5 km/h) for
each 0.75 seconds the lever is held
In the constant speed control mode ( P. 305), the set speed will
be increased or decreased as follows:
Fine adjustment: By approximat ely 1 mph (1.6 km/h) each time
the lever is operated
Large adjustment: The set speed can be increased or
decreased continually until the lever is released.

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When driving
SIENNA_U (OM45477U)
■Changing the vehicle -to-vehicle distance
Pressing the button changes
the vehicle-to-vehicle dis-
tance as follows:
Long
Medium
Short
Vehicles without a smart key
system:
The vehicle-to-vehicle distance
is set automatically to long
mode when the engine switch
is turned to the “ON” position.
Vehicles with a smart key sys-
tem:
The vehicle-to-vehicle distance
is set automatically to long
mode when the “ENGINE
START STOP” switch is turned
to IGNITION ON mode.
If a vehicle is running ahead of
you, the preceding vehicle
mark will be also displayed.
Preceding
vehicle mark

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SIENNA_U (OM45477U)
■Vehicle-to-vehicle distance settings
Select a distance from the table below. Note that the distances
shown correspond to a vehicle speed of 50 mph (80 km/h). Vehi-
cle-to-vehicle distance increases/decreases in accordance with
vehicle speed.
■ Canceling and resuming the speed control
Pulling the lever toward you
cancels the constant speed
control.
The speed setting is also can-
celed when the brakes are
applied.
Pushing the lever up
resumes the cruise control
and returns vehicle speed
to the set speed.
Resuming is available when
the vehicle speed is more
than approximately 25 mph
(40 km/h).
Distance optionsVehicle-to-vehicle distance
LongApproximately 160 ft. (50 m)
MediumApproximately 130 ft. (40 m)
ShortApproximately 100 ft. (30 m)

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When driving
SIENNA_U (OM45477U)
Driving in vehicle-to-vehicle distance control mode
This mode employs a radar sensor to detect the presence of vehicles
up to approximately 400 ft. (120 m) ahead, determines the current
vehicle-to-vehicle following distance, and operates to maintain a suit-
able following distance from the vehicle ahead.
Note that vehicle-to-vehicle distance will close in when traveling on long
downhill slopes.
Example of 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.
Example of deceleration cruising
When the vehicle ahead is driving slower than the set speed
When a vehicle is detected running ahead of you, the system automati-
cally decelerates your vehicle. When a greater reduction in vehicle speed
is necessary, the system applies the brakes. A warning tone warns you
when the system cannot decelerate sufficiently to prevent your vehicle
from closing in on the vehicle ahead.

304 2-4. Using other driving systems
SIENNA_U (OM45477U)Example of follow-up cruising
When following a vehicle driv
ing slower than the set speed
The system continues follow-up cruising while adjusting for changes in the
speed of the vehicle ahead in order to maintain the vehicle-to-vehicle dis-
tance set by the driver.
Example of acceleration
When there are no longer any vehi cles ahead driving slower than
the set speed
The system accelerates until the set speed is reached. The system then
returns to constant speed cruising.
Approach warning
When your vehicle is too close to a vehicle ahead, and sufficient
automatic deceleration via the cruise control is not possible, the dis-
play will flash and the bu zzer will sound to alert the driver. An exam-
ple of this would be if another driver cuts in front of you while you are
following a vehicle. Apply the brakes to ensure an appropriate vehi-
cle-to-vehicle distance.
■ Warnings may not occur when
In the following instan ces, there is a possibility that the warnings
will not occur:
● When the speed of the vehicl e ahead matches or exceeds your
vehicle speed
● When the vehicle ahead is traveling at an extremely slow speed
● Immediately after the cruise control speed was set
● At the instant the accelerator is applied