sensor TOYOTA SIENNA 2018 (in English) Repair Manual

4727-2. Steps to take in an emergency
SIENNA_OM_OM08019U_(U)
SRS warning lightIndicates a malfunction in:
• The SRS airbag system;
• The front passenger occupant classification system; or
• The seat belt pretensioner system
 Have the vehicle inspected by your Toyota dealer
immediately.
(U.S.A.)
(Canada)
ABS warning light Indicates a malfunction in:
• The ABS; or
• The brake assist system
 Have the vehicle inspected by your Toyota dealer
immediately.
Electric power steering system warning light (warning
buzzer)
Indicates a malfunction in the EPS (Electric Power
Steering) system
 Have the vehicle inspected by your Toyota dealer
immediately.
(Flashes or
illuminates)
PCS warning light
Indicates a malfunction in the PCS (Pre-Collision System)
or that the system is temporarily unavailable due to the
vehicle being extremely hot/cold, or dirt around a front
sensor, etc. ( P. 278, 481)
 Follow the instructions dis played on the multi-infor-
mation display. (P. 278, 481)
If the PCS (Pre-Collision System) or VSC (Vehicle Stability
Control) system is disabled, the PCS warning light will illu-
minate.
 P. 278
(Amber)
LDA indicator*2
Indicates a malfunction in the LDA (Lane Departure Alert
with steering control)
 When “Lane Departure Alert Unavailable” is dis-
played on the multi-information display, turn the LDA
system off, drive the vehicle for a short time, and
then turn the LDA system back on. ( P. 282)
When a message other than above is displayed, fol-
low the instructions displayed in the message.
Warning lightWarning light/Details/Actions

4767-2. Steps to take in an emergency
SIENNA_OM_OM08019U_(U)
■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” indi cator light,
“AIR BAG OFF” indicator light, front passenger’s seat belt buck le switch, seat
belt assemblies, airbags, inter connecting wiring and power sour ces. (P. 38)
■ Front passenger detection sensor, seat belt reminder and warnin g
buzzer
● If luggage is placed on the front passenger seat, the front pas senger detec-
tion sensor may cause the warning light to flash and the warnin g 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 lamp 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 wa rning light (warning buzzer)
When the battery charge becomes insufficient or the voltage tem porarily
drops, the electric power steering system warning light may com e 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 pressur e warning reset switch will not turn off the tire pressure
warning light.
■The tire pressure warning light may come on due to natural caus es
The tire pressure warning light may come on due to natural caus es such
as natural air leaks and tire inflation pressure changes caused by tem-
perature. In this case, adjusting the tire inflation pressure w ill turn off the
warning light (afte r a few minutes).

4847-2. Steps to take in an emergency
SIENNA_OM_OM08019U_(U)■
If “Engine Coolant Temp is High” is shown
The engine coolant temperature is too high. Following the instr uctions,
accordingly. ( P. 509)
■ If “Clean Park Sonar” is shown
The intuitive parking assist is dirty or covered with ice. Clean the sensor.
■ The messages that need for cont acting your Toyota dealer
● If any of the following messages is shown on the multi-informat ion display, it
may indicate a malfunction. Have the vehicle inspected by your To y o t a
dealer immediately.
• “Check Park Sonar System”
• “Check Vehicle Stability Control System”
• “Check Steering Lock System”
● If any of the following messages is shown on the multi-informat ion display, it
may indicate a malfunction. Immediately stop the vehicle and contact your
Toyota dealer.
• “Check Charging System”
• “Low Oil Pressure”
• “Check Brake System”

546
SIENNA_OM_OM08019U_(U)
8-2. Customization
■Automatic light control system (P. 241)
*: U.S.A. only
■
Intuitive parking assist* (  P. 314)
*: If equipped
■
Automatic air c onditioning system ( P. 332)
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 On Off – – O
Daytime running light
system
*On Off – – O
123
FunctionDefault settingCustomized
setting
Detection distance of the
rear center sensor Far Near O – O
Buzzer volume Level 2 Level 1 to 3 O – O
123
FunctionDefault settingCustomized setting
A/C on operation linked
with “AUTO” button On Off O – O
123

569What to do if... (Troubleshooting)
SIENNA_OM_OM08019U_(U)
●Did anyone inside the vehicle open a door during setting the alarm?
The sensor detects it and the alarm sounds. ( P. 79)
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 sm art key
system) or start the engine.
●Is the message displayed on the multi-information display?
Check the message on the multi-information display. ( P. 481)
●When a warning light turns on or a warning message is displayed , refer to
P. 471, 481.
●Vehicles with run-flat tires:
Slow down the vehicle, drive wit h extra caution, and take your vehicle
to the nearest Toyota dealer or authorized tire dealer as soon as possi-
ble to have the tire replaced. ( P. 4 9 9 )
●Vehicles with a compact spare tire:
Stop the vehicle in a safe place and replace the flat tire with the spare
tire. ( P. 485)
●Try the procedure for when the vehicle becomes stuck in mud, di rt, or
snow. ( P. 512)
An alarm is activated and t he horn sounds (if equipped)
A warning buzzer sounds w hen leaving the vehicle
(vehicles with a smart key system)
A warning light turns on or a warning message is displayed
When a problem has occurred
If you have a flat tire
The vehicle becomes stuck

578Alphabetical index
SIENNA_OM_OM08019U_(U)
Navigation system*Noise from under vehicle............ 8
Odometer.................................... 90
OilEngine oil .............................. 518
Opener
Back door.............................. 134
Fuel filler door ....................... 258
Hood ..................................... 407
Outer foot lights Outer foot lights .................... 347
Replacing light bulbs............. 456
Outside rear view mirrors Adjusting and folding ............ 181
BSM (Blind spot monitor) ...... 302
Driving position memory ....... 169
Outside rear view mirror defoggers ........................... 336
Outside temperature display ...................................... 90
Overhead console ................... 358
Overheating, Engine................ 509 Panoramic view monitor
*
Parking assist sensors
(intuitive parking assist)....... 314
Parking brake........................... 240 Operation .............................. 240
Parking brake
engaged warning
buzzer ................................ 471
Parking lights Light switch ........................... 241
Replacing light bulbs .... 450, 456
Wattage ................................ 525
PCS (Pre-Collision System).... 267 Enabling/disabling the
system .......... ...................... 270
Function ................................ 267
Warning light......................... 472
Personal lights Switch ................................... 348
Wattage ................................ 525
Power back door ..................... 133
Power outlets ........................... 365
Power windows Jam protection function ........ 185
Operation .............................. 184
Window lock switch .............. 184
Pre-collision system (PCS)..... 267
Enabling/disabling the system .......... ...................... 270
Function ................................ 267
Warning light......................... 472
N
O
P

580Alphabetical index
SIENNA_OM_OM08019U_(U)
SeatsAdjustment .................... 149, 152
Adjustment
precaution................... 151, 166
Child seats/child restraint
system installation . ............... 58
Cleaning................................ 395
Driver’s seat position memory .............................. 169
Head restraint ....................... 173
Properly sitting in the seat ...... 28
Seat heaters ......................... 344
Sensor Automatic headlight
system ......... ....................... 244
Automatic High Beam system ......... ....................... 248
Inside rear view mirror .......... 180
Intuitive parking assist .......... 314
LDA (Lane Departure Alert)........ 279
Radar sensor ........................ 263
Rain-sensing windshield wipers ................................. 254
Service reminder indicators ..... 84
Shift lever Automatic transaxle .............. 233
If the shift lever cannot
be shifted from P ................ 237
Shift lock system ..................... 236
Side airbags ............................... 38
Side marker lights Light switch ........................... 241
Replacing .............. 450, 452, 456
Wattage ................................ 525
Side mirrors
Adjusting and folding ............ 181
BSM (Blind Spot Monitor) ..... 302
Heaters ................................. 336
Mirror position memory ......... 169 Sliding doors
Sliding doors ......................... 121
Wireless remote control ........ 124
Smart key system Antenna location ................... 143
Entry function........ 110, 121, 133
Starting the engine ............... 228
Warning message................. 481
Snow tires ................................ 327
Spare tire Inflation pressure .................. 524
Storage location.................... 486
Spark plug ................................ 520
Specifications .......................... 516
Speedometer.............................. 90
Steering wheel Adjustment............................ 177
Audio switches
*
Column lock release ..... 226, 231
Heated steering wheel .......... 344
Meter control switches ............ 93
Talk switch
*
Telephone switches*
Stop lights
Replacing light bulbs .... 453, 456
Wattage ................................ 525
Storage feature ........................ 350
Storage precautions........ 207, 350
Stuck If your vehicle becomes
stuck ................................... 512
Sunshades Rear door.............................. 372
Roof ...................................... 190
Sun visors ................................ 363
Switch Audio remote control switches
*
Cruise control switch ............ 289