sensor TOYOTA AVALON 2020 (in English) Repair Manual

3104-5. Using the driving support systems
◆EPS (Electric Power Steering)
Employs an electric motor to reduce the amount of effort needed to
turn the steering wheel
◆Adaptive Variable Suspension System (if equipped)
By independently controlling the damping force of the shock
absorbers for each of the 4 wheels according to the road and dr iv-
ing conditions, this system helps riding comfort with superior vehi-
cle stability, and helps good vehicle posture ( P. 3 0 5 )
◆The Secondary Collision Brake
When the SRS airbag sensor detects a collision and the system
operates, the brakes and stop li ghts are automatically controlled to
reduce the vehicle speed and hel p reduce the possibility of further
damage due to a secondary collision.
The slip indicator light will flash
while the TRAC/VSC systems are
operating.
When the TRAC/VSC systems are operating

3134-5. Using the driving support systems
4
Driving
■Sounds and vibrations caused by the ABS, brake assist, VSC, TRA C and
hill-start assist control systems
● A sound may be heard from the engine compartment when the brake pedal
is depressed repeatedly, when the engine is started or just aft er the vehicle
begins to move. This sound does not indicate that a malfunction has
occurred in any of these systems.
● Any of the following conditions may occur when the above system s are
operating. None of these indicates that a malfunction has occur red.
• Vibrations may be felt through the vehicle body and steering.
• A motor sound may be heard also after the vehicle comes to a s top.
• The brake pedal may pulsate slightly after the ABS is activate d.
• The brake pedal may move down slightly after the ABS is activa ted.
■ EPS operation sound
When the steering wheel is operated, a motor sound (whirring so und) may be
heard. This does not indicate a malfunction.
■ Active Cornering Assist operation sounds and vibrations
When the Active Cornering Assist is operated, operation sounds and vibra-
tions may be generated from the brake system, but this is not a malfunction.
■ Automatic reactivation of TRAC and VSC systems
After turning the TRAC and VSC systems off, the systems will be automati-
cally re-enabled in the following situations:
● When the engine switch is turned off
● If only the TRAC system is turned off, the TRAC will turn on wh en vehicle
speed increases
If both the TRAC and VSC systems are turned off, automatic re-e nabling will
not occur when vehicle speed increases.
■ Operating conditions of Active Cornering Assist
The system operates when the following occurs.
●TRAC/VSC can operate
● The driver is attempting to accelerate while turning
● The system detects that the vehicle is sliding to the outer sid e
● The brake pedal is released
■ Secondary Collision Brake operating conditions
The system operates when the SRS airbag sensor detects a collis ion while
the vehicle is in motion.
However, the system does not operate in any of the following si tuations.
● The vehicle speed is below 6 mph (10 km/h)
● Components are damaged

4327-2. Steps to take in an emergency
(Flashes)(U.S.A.)
(Flashes)
(Canada)
Parking brake indicator (warning buzzer)*2
It is possible that the parking brake is not fully engaged or
released
 Operate the parking brake once again.
This light comes on when the parking brake is not
released. If the light turns off after the parking brake is ful ly
released, the system is operating normally.
(Flashes)
Brake hold operated indicator Indicates a malfunction in the brake hold system
 Have the vehicle inspected by your Toyota dealer
immediately.
(Red/yellow)
Electric power steering system warning light (warning
buzzer)
Indicates a malfunction in the EPS (Electric Power Steer-
ing) system
 Have the vehicle inspected by your Toyota dealer
immediately.
(Amber)
LDA indicator
Indicates a malfunction in the LDA
 When “LDA Unavailable” is displayed 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. 242)
When a message other than above is displayed, fol-
low the instructions displayed in the message.
(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. 236, 440)
 Follow the instructions displayed on the multi-infor-
mation display. (P. 236, 440)
If the PCS (Pre-Collision System) or VSC (Vehicle Stability
Control) system is disabled, the PCS warning light will illu-
minate.
 P. 237
Warning lightWarning light/Details/Actions

4337-2. Steps to take in an emergency
7
When trouble arises
(If equipped)(Flashes)
ICS OFF indicator
When a buzzer sounds:
Indicates a malfunction in the Intelligent Clearance Sonar
system
 Have the vehicle inspected by your Toyota dealer
immediately.
When a buzzer does not sound:
Indicates that the system is temporarily unavailable, possi-
bly due to a sensor being dirty or covered with ice, etc.
 Clear the dirt, etc.
Slip indicator
Indicates a malfunction in:
• The VSC (Vehicle Stability Control) system;
• The TRAC (Traction Control) system; or
• The ABS
The light will flash when the VSC or TRAC
system is oper-
ating.
 Have the vehicle inspected by your Toyota dealer
immediately.
Low fuel level warning light
Indicates that remaining fuel is approximately 2.2 gal. (8.3
L, 1.6 Imp. gal.)
*3
Indicates that remaining fuel is approximately 2.4 gal. (9.1
L, 2.0 Imp. gal.)
 Refuel the vehicle.
Driver’s and front passenger’ s seat belt reminder light
(warning buzzer)
*4
Warns the driver and/or front passenger to fasten their
seat belts
 Fasten the seat belt.
If the front passenger’s seat is occupied, the front
passenger’s seat belt also needs to be fastened to
make the warning light (warning buzzer) turn off.
Rear passengers’ seat belt reminder lights (warning
buzzer)
*5
Warns the rear passengers to fasten their seat belts.
 Fasten the seat belt.
Master warning light (warning buzzer)
A buzzer sounds and the warning light comes on and
flashes to indicate that the master warning system has
detected a malfunction.
 P. 440
Warning lightWarning light/Details/Actions

4357-2. Steps to take in an emergency
7
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 (front), side
impact sensors (rear), driver’s seat position sensor, driver’s seat belt buckle
switch, front passenger occupant classification system (ECU and sensors),
“AIR BAG ON” indicator light, “A IR BAG OFF” indicator light, seat belt preten-
sioners, airbags, interconnecting wiring and power sources. (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 w arning 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.

5028-2. Customization
■Automatic light control system (P. 2 0 2 )
■Lights ( P. 202)
*: Except for Canada
■
Intuitive parking assist* (  P. 276)
*: If equipped
FunctionDefault settingCustomized setting
Light sensor sensitivityStandard-2 to 2OO
Time elapsed before
headlights automatically
turn off after doors are
closed
30 seconds
Off
OO60 seconds
90 seconds
12
FunctionDefault settingCustomized setting
Daytime running light
systemOnOff*OO
Welcome lightingOnOff—O
Windshield wiper linked
headlight illuminationOnOff—O
12
FunctionDefault settingCustomized setting
Detection distance of the
front center sensorFarNear—O
Detection distance of the
rear center sensorFarNear—O
12

524What to do if... (Troubleshooting)
●The seat belt reminder light is flashing
Are the driver and the passenger wearing the seat belts? (P. 433)
●The parking brake indicator is on
Is the parking brake released? (P. 196)
Depending on the situation, other types of warning buzzer may also sound.
( P. 430, 440)
●Did anyone inside the vehicle open a door during setting the al arm?
The sensor detects it and the alarm sounds. ( P. 80)
Do one of the following to stop the alarm: • Unlock the doors.
• Open the trunk using the entry function or wireless remote con trol.
• Turn the engine switch to ACCESSORY or IGNITION ON mode, or st art
the engine.
●Is the message displayed on the multi-information display?
Check the message on the multi-information display. ( P. 440)
●When a warning light turns on or a warning message is displayed , refer to
P. 430, 440.
●Stop the vehicle in a safe place and replace the flat tire with the spare
tire. ( P. 445)
●Try the procedure for when the vehicle becomes stuck in mud, di rt, or
snow. ( P. 469)
A warning buzzer sounds during driving
An alarm is activated and the horn sounds
A warning buzzer sounds w hen leaving the vehicle
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

535Alphabetical index
Seats ................................. 142, 144Adjustment .................... 142, 144
Adjustment precautions ................. 143, 145
Child seats/child restraint system installation . ............... 63
Cleaning................................ 369
Driving position memory ....... 146
Folding down the rear seatbacks ........................... 144
Front seat heaters................. 329
Head restraints ..................... 151
Power easy access system ......... ....................... 146
Properly sitting in the seat ...... 28
Rear seat heaters ................. 329
Seat ventilators ..................... 329
Secondary Collis ion Brake ..... 310
Sensor
Automatic headlight system ......... ....................... 204
Automatic High Beam
system ......... ....................... 206
Camera sensor ..................... 220
Inside rear view mirror .......... 156
Intuitive parking assist .......... 276
LDA (Lane Departure Alert with steering control) .......... 238
Radar sensor ........................ 220
Service reminder indicators ................................. 84
Shift lever ................................. 189 Automatic transmission......... 189
If the shift lever cannot be shifted from P ................ 193
S mode ................................. 190 Shift lock system ..................... 192
Side airbags ............................... 37
Side marker lights ................... 202
Light switch ........................... 202
Replacing light bulbs ............ 419
Side mirrors ............................. 157 Adjusting and folding ............ 157
BSM (Blind Spot Monitor) ..... 261
Heaters ................................. 324
Side turn signal lights
Replacing light bulbs ............ 419
Turn signal lever ................... 195
Smart key system .................... 135
Antenna location ................... 135
Entry functions .............. 125, 131
Starting the engine ............... 184
Snow tires ................................ 318
Spare tire .................................. 445 Inflation pressure .................. 478
Storage location.................... 446
Spark plug ................................ 476
Specifications .......................... 472
Speedometer.............................. 90
Sport mode .............................. 305
Steering lock Column lock release ............. 186
Steering wheel ......................... 153 Adjustment............................ 153
Heated steering wheel .......... 329
Meter control switches ............ 94
Power easy access
system .......... ...................... 146
Stoplights Replacing light bulbs ............ 419
Storage feature ........................ 335
Storage precautions................ 335