Page 342 of 876

342 2-4. Using other driving systems
SIENNA_OM_OM45472U_(U)
■Situations in which the pre-collis ion system does not function properly
The system may not function effectively in situations such as the following:
● On roads with sharp bends or uneven surfaces
● If a vehicle suddenly moves in front of your vehicle, such as at an inter-
section
● If a vehicle suddenly cuts in front of your vehicle, such as when overtak-
ing
● In inclement weather such as heavy rain, fog, snow or sand storms
● When your vehicle is skidding such as the VSC system off
● When an extreme change in vehicle height occurs
● When the axis of the radar is out of adjustment
■ Automatic cancelation of the pre-collision system
When a malfunction occurs due to sensor contamination, etc. that results in
the sensors being unable to detect obstacles, the pre-collision system will be
automatically disabled. In this case, the system will not activate even if there
is a collision possibility.
■ When there is a malfunction in the system
Warning lights and warning messages will turn on or flash. ( P. 745)
Page 355 of 876

355
2-4. Using other
driving systems
2
When driving
SIENNA_OM_OM45472U_(U)
■The outside rear view mirror indicators visibility
When under strong sunlight, the outside rear view mirror indicator may be
difficult to see.
■ When there is a malfunction in the Blind Spot Monitor system
If a system malfunction is detected due to any of the following reasons,
warning lights will turn on: ( P. 746)
● There is a malfunction with the sensors
● The sensors have become dirty
● The outside temperature is extremely high or low
● The sensor voltage has become abnormal
■ Certification for the Blind Spot Monitor system
For vehicles sold in the U.S.A.
FCC ID: OAYSRR2A
This device complies with part 15 of the FCC Rules. Operation is subject to
the following two conditions:
(1) This device may not cause harmful interference, and
(2) this device must accept any interference received, including interference
that may cause undesired operation.
FCC WARNING
Changes or modifications not expressly approved by the party responsible
for compliance could void the user’s authority to operate the equipment.
For vehicles sold in Canada
Applicable law: Canada 310
This device complies with Industry Canada licence-exempt RSS stan-
dard(s). Operation is subject to the following two conditions: (1) this device
may not cause interference, and (2) this device must accept any interfer-
ence, including interference that may cause undesired operation of the
device.
Frequency bands: 24.05-24.25 GHz
Output power: less than 20 milliwatts
Page 380 of 876
380 2-5. Driving information
SIENNA_OM_OM45472U_(U)
Positions for towing hitch receiverHitch receiver pin hole posi-
tion: 37.3 in. (949.8 mm)
Connecting trailer lightsPlease consult your dealer when inst alling trailer lights, as incorrect
installation may cause damage to the vehicle’s lights. Please take
care to comply with your state’ s laws when installing trailer lights.
Page 381 of 876

381
2-5. Driving information
2
When driving
SIENNA_OM_OM45472U_(U)
Trailer towing tips
Your vehicle will handle differently when towing a trailer. Help to avoid
an accident, death or serious injury, keep the following in mind when
towing:
● Speed limits for towing a trailer vary by state or province. Do not
exceed the posted towing speed limit.
● Toyota recommends that the vehicle-trailer speed limit is 65 mph
(104 km/h) on a flat, straight, dry road. Do not exceed this limit, the
posted towing speed limit or the speed limit for your trailer as set
forth in your trailer owner’s man ual, whichever is lowest. Instability
of the towing vehicle-trailer combin ation (trailer sway) increases as
speed increases. Exceeding speed limits may cause loss of con-
trol.
● Before starting out, check the trailer lights, tires and the vehicle-
trailer connections. Recheck after driving a short distance.
● Practice turning, stopping and reve rsing with the trailer attached in
an area away from traffic until you become accustomed to the feel
of the vehicle-trailer combination.
Page 385 of 876

385
2-5. Driving information
2
When driving
SIENNA_OM_OM45472U_(U)
■
Matching trailer ball height to trailer coupler height
■ Before towing
Check that the following conditions are met:
● Ensure that your vehicle’s tires are properly inflated. ( P. 810)
● Trailer tires are inflated according to the trailer manufacturer’s recom-
mendation.
● All trailer lights work as required by law.
● All lights work each time you connect them.
● The trailer ball is set at the proper height for the coupler on the trai\
ler.
● The trailer is level when it is hitched.
Do not drive if the trailer is not level, and check for improper tongue
weight, overloading, worn suspension, or other possible causes.
● The trailer cargo is securely loaded.
● The rear view mirrors conform to all applicable federal, state/provincial or
local regulations. If they do not, install rear view mirrors appropriate for
towing purposes.
No matter which class of tow hitch
applies, for a safe trailer hookup, the
trailer ball setup on must be proper height
for the coupler on the trailer.
Coupler
Trailer ball
Page 390 of 876

390 2-5. Driving information
SIENNA_OM_OM45472U_(U)
CAUTION
■When towing a trailer
Toyota recommends trailers with brakes that conform to any applicable fed-
eral and state/provincial regulations.
● If the gross trailer weight exceeds unbraked TWR, trailer brakes are
required. Toyota recommends trailers with brakes that conform to all appli-
cable federal and state/provincial regulations.
● Never tap into your vehicle’s hydraulic system, as this will lower the vehi-
cle’s braking effectiveness.
● Never tow a trailer without using a safety chain securely attached to both
the trailer and the vehicle. If damage occurs to the coupling unit or hitch
ball, there is danger of the trailer wandering into another lane.
NOTICE
■When installing a trailer hitch
Use only the position recommended by your Toyota dealer. Do not install the
trailer hitch on the bumper; this may cause body damage.
■ Do not directly splice trailer lights
Do not directly splice trailer lights. Directly splicing trailer lights may damage
your vehicle’s electrical system and cause a malfunction.
Page 393 of 876

Interior features3
393
SIENNA_OM_OM45472U_(U)
3-5. Using the hands-free phone system (for cellular phone)
Hands-free phone system (for cellular phone)
features .......................... 543
Using the hands-free phone system
(for cellular phone) ......... 548
Making a phone call ......... 557
Setting a cellular phone ............................. 562
Security and system setup .............................. 567
Using the phone book ...... 572
3-6. Using the interior lights Interior lights list ............... 580
• Personal/interior light main switch .................... 581
• Personal/interior lights ... 582
• Personal lights ............... 584
• Rear ceiling lights .......... 584 3-7. Using the storage features
List of storage features .... 586
• Glove boxes ................... 587
• Console box ................... 589
• Overhead console .......... 592
• Cup holders ................... 593
• Bottle holders ................. 596
• Door pockets .................. 598
• Auxiliary boxes ............... 599
3-8. Other interior features Sun visors ........................ 604
Vanity mirrors ................... 605
Clock ................................ 606
Conversation mirror ......... 607
Power outlets ................... 608
Seat heaters..................... 612
Armrests........................... 614
Assist grips....................... 616
Rear side sunshades ....... 617
Grocery bag hooks........... 618
Floor mat .......................... 620
Luggage compartment features .......................... 622
Garage door opener......... 624
Compass .......................... 632
Safety Connect ................ 637
Page 580 of 876
580
SIENNA_OM_OM45472U_(U)
3-6. Using the interior lights
Interior lights list
Outer foot lights (if equipped)
Rear interior light
Rear personal/interior lights (P. 583)
Rear ceiling lights (if equipped) ( P. 584)
Front personal/interior lights ( P. 582)
Engine switch light (if equipped)
Front door courtesy lights (if equipped)