2017 TOYOTA SIENNA sensor

5498-2. Steps to take in an emergency
SIENNA_OM_OM08007U_(U)
8
When trouble arises
■SRS warning light
This warning light system monitors the airbag sensor assembly, front impact
sensors, side impact sensors (front door), side impact sensors (rear), driver’s
seat position sensor, driver’s seat belt buckle switch, front passenger occu-
pant classification system (ECU and sensors), “AIR BAG ON” indicator light,
“AIR BAG OFF” indicator light, front passenger’s seat belt buckle switch, seat
belt assemblies, airbags, interconnecting wiring and power sources. ( P. 36)
■ Front passenger detection sensor, seat belt reminder and warning
buzzer
● If luggage is placed on the front passenger seat, the front passenger detec-
tion sensor may cause the warning light to flash and the warning buzzer to
sound even if a passenger is not sitting in the seat.
● If a cushion is placed on the seat, the sensor may not detect a passenger,
and the warning light may not operate properly.
■ If the malfunction indicator la mp comes on while driving
First check the following:
● Is the fuel tank empty?
If it is, fill the fuel tank immediately.
● Is the fuel tank cap loose?
If it is, tighten it securely.
The light will go off after several driving trips.
If the light does not go off even after several trips, contact your Toyota dealer
as soon as possible.
■ Electric power steering system warning light (warning buzzer)
When the battery charge becomes insufficient or the voltage temporarily
drops, the electric power steering system warning light may come on and the
warning buzzer may sound.
■
When the tire pressure warning light comes on
Check the tire inflation pressure and adjust to the appropriate level. Push-
ing the tire pressure warning reset switch will not turn off the tire pressure
warning light.
■The tire pressure warning light may come on due to natural causes
The tire pressure warning light may come on due to natural causes such
as natural air leaks and tire inflation pressure changes caused by temper-
ature. In this case, adjusting the ti re inflation pressure will turn off the
warning light (after a few minutes).

5568-2. Steps to take in an emergency
SIENNA_OM_OM08007U_(U)Indicates that the hood is not fully closed
If the vehicle reaches a speed of 3 mph (5 km/h),
flashes and a buzzer sounds to indicate
that the hood is not yet fully closed.
 Close the hood.
Indicates that the back door is not fully closed If the vehicle reaches a speed of 3 mph (5 km/h),
flashes and a buzzer sounds to indicate
that the back door is not yet fully closed.
 Close the back door.
(If equipped)
Indicates a malfunction in the intuitive parking
assist
A buzzer also sounds.
 Have the vehicle inspected by your Toyota
dealer.
(If equipped)
Indicates that the intuitive parking assist is dirty or
covered with ice
A buzzer also sounds.
 Clean the sensor.
Warning messageDetails/Actions

5598-2. Steps to take in an emergency
SIENNA_OM_OM08007U_(U)
8
When trouble arises
Indicates that the engine coolant temperature is
too highA buzzer also sounds.
 P. 594
Indicates a malfunction in the vehicle’s charging
system.
 Immediately stop the vehicle in a safe place
and contact your Toyota dealer. Continuing
to drive the vehicle may be dangerous.
(If equipped)
Indicates that the radar sensor is dirty or covered
with ice A buzzer also sounds.
 Clean the sensor.
(If equipped)
Indicates that the dynamic radar cruise control
system is unable to judge vehicle-to-vehicle dis-
tance
A buzzer also sounds.
 If the windshield wipers are on, turn them
off or set them to a mode other than AUTO
or high speed wiper operation.
Warning messageDetails/Actions

5608-2. Steps to take in an emergency
SIENNA_OM_OM08007U_(U)
(If equipped)
Indicates that a Blind Spot Monitor sensor or the
surrounding area on the bumper is dirty or cov-
ered with iceA buzzer also sounds.
 Clean the sensor and its surrounding area
on the bumper.
Indicates a malfunction in:
• The cruise control system; or
• The dynamic radar cruise control system (if equipped)
Press the “ON/OFF” button once to deactivate
the system, and then press the button again to
reactivate the system.
A buzzer also sounds.
 Have the vehicle inspected by your Toyota
dealer.
(If equipped)
Indicates a malfunction in the PCS (Pre-Collision
system)
A buzzer also sounds.
 Have the vehicle inspected by your Toyota
dealer.
(If equipped)
Indicates a malfunction in the BSM (Blind Spot
Monitor) system
A buzzer also sounds.
 Have the vehicle inspected by your Toyota
dealer.
(If equipped)
Indicates a malfunction in the steering lock sys-
tem
Have the vehicle inspected by your Toyota
dealer.
Warning messageDetails/Actions
(Flashes)
(Flashes)

5648-2. Steps to take in an emergency
SIENNA_OM_OM08007U_(U)
*: Refer to the separate “Scheduled Maintenance Guide” or “Owner’s ManualSupplement” for the maintenance interval applicable to your vehicle.
(U.S.A. only)
Indicates that all maintenance is required to cor-
respond to the driven distance on the mainte-
nance schedule
*.
Comes on approximately 5000 miles (8000 km)
after the message has been reset. (The indicator
will not work properly unless the message has
been reset.)
 Perform the necessary maintenance.
Please reset the message after the mainte-
nance is performed ( P. 475)
(If equipped)
Indicates that the PCS (Pre-collision system) is
not currently functional because the grille cover
or the sensor is dirty
Check the grille cover and the sensor and
clean them if they are dirty.
Warning messageDetails/Actions

SIENNA_OM_OM08007U_(U)
6319-2. Customization
9
Vehicle specifications
■Automatic light control system (P. 242)
*1: If equipped
*2: U.S.A. only
■
Intuitive parking assist*1 (  P. 279)
*1: If equipped
*2: When intuitive parking assist is operating.
■
Automatic air condi tioning system (P. 412)
FunctionDefault settingCustomized
setting
Light sensor sensitivity Standard -2 to 2 O – O
Time elapsed before head-
lights automatically turn off
after doors are closed 30 secondsOff
O–O
60 seconds
90 seconds
Automatic High Beam
*1On Off – – O
Daytime running light
system
*2On Off – – O
123
FunctionDefault settingCustomized
setting
Detection distance of the
rear center sensor Far Near O – O
Buzzer volume Level 3 Level 1 to 5 O – O
Display setting
*2All sensors displayed Display off O – O
123
FunctionDefault settingCustomized
setting
A/C on operation linked
with “AUTO” button On Off O – O
123

653What to do if... (Troubleshooting)
SIENNA_OM_OM08007U_(U)
●The seat belt reminder light is flashing
Are the driver and the front passenger wearing the seat belts? (P. 547)
●The brake system warning light is on
Is the parking brake released? (P. 241)
Depending on the situation, other types of warning buzzer may also sound.
(  P. 545, 554)
●Did anyone inside the vehicle open a door during setting the alarm?
The sensor detects it and the alarm sounds. ( P. 77)
To stop the alarm, turn the engine switch to the “ON” position (vehicles with-
out a smart key system) or IGNITION ON mode (vehicles with a smart key
system) or start the engine.
●Is the message displayed on the multi-information display?
Check the message on the multi-information display. ( P. 554)
A warning buzzer sounds during driving
An alarm is activated and the horn sounds (if equipped)
A warning buzzer sounds when leaving the vehicle
(vehicles with a smart key system)

664Alphabetical index
SIENNA_OM_OM08007U_(U)
Parking assist sensors (intuitive parking assist) ....... 279
Parking brake ........................... 241 Operation .............................. 241
Parking brake engaged warning
buzzer/message ......... 545, 558
Parking lights
Light switch ........................... 242
Replacing light bulbs..... 525, 531
Wattage ................................ 608
PCS (Pre-Collision System) Function ................................ 302
Pre-collision braking off switch ................................. 303
Warning light ......................... 546
Warning message ............. 555, 560, 564
Personal lights Switch ................................... 428
Wattage ................................ 608
Power back door...................... 133
Power outlets ........................... 445
Power windows Jam protection function......... 185
Operation .............................. 184
Window lock switch............... 184
Pre-collision system (PCS) Function ................................ 302
Pre-collision braking off switch ................................. 303
Warning light ......................... 546
Warning message ............. 555, 560, 564 Quarter windows ..................... 187
Radar cruise control
(dynamic radar cruise
control)................................... 266
Radiator .................................... 491
Radio
*...................................... 340
Rear automatic air conditioning system ............. 421
Rear ceiling light ..................... 429
Rear seat
Adjustment............................ 152
Folding third seats ........ 159, 160
Installing second seats ......... 158
Removing second seats ....... 156
Stowing third seats ....... 161, 163
Rear seat entertainment system
*
Rear turn signal lights Replacing light bulbs ............ 528
Turn signal lever ................... 240
Wattage ................................ 608
Rear view mirror Compass .............................. 457
Inside rear view mirror .......... 179
Outside rear view mirrors ..... 181
Rear view monitor system ...... 287
Rear window defogger ............ 416
Rear window wiper .................. 257
Replacing Electronic key battery ........... 511
Fuses .................................... 514
Light bulbs ............................ 517
Rear seat entertainment system control battery
*
Tires...................................... 572
Wireless remote control battery ................................ 511
PQ
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