sensor Lexus ES350 2017 s Workshop Manual

4838-2. Steps to take in an emergency
ES350_OM_OM33C68U_(U)
8
When trouble arises
Electric power steering system warning light (warning buzzer) Indicates a malfunction in the EPS (Electric Power Steering) sys-
tem
→ Have the vehicle inspected by your Lexus dealer immediately.
(If equipped)
PCS (Pre-Collision System) warning light
●When the warning light flashes (and a buzzer sounds):
Indicates a malfunction in the PCS (Pre-Collision System)
→Have the vehicle inspected by your Lexus dealer immediately.
●When the warning light flashes (and a buzzer does not sound):
Indicates that the PCS (Pre-Collision System) is temporarily
unavailable, possibly due to either of the following:
• An area around the radar sensor or camera sensor being dirty
or covered with condensation, ice, stickers, etc.
→ Clear the dirt, condensation, ice, stickers, etc. ( →P. 1 8 2 )
• Radar sensor or camera sensor operational conditions (such as temperature etc.) being not met
→ Driving is possible in this case. The PCS (Pre-Collision Sys-
tem) will be enabled if the operational conditions (such as
temperature etc.) are met again.
●When the warning light is illuminated:
Either the VSC (Vehicle Stability Control) system or PCS (Pre-
Collision System) is disabled or both are disabled.
→ To enable the PCS (Pre-Collision System), enable both the
VSC system and PCS (Pre-Collision System). ( →P. 2 6 0 )
Slip indicator light
Indicates a malfunction in:
• The VSC system;
•The TRAC system; or
• The hill-start assist control system
→ Have the vehicle inspected by your Lexus dealer immediately.
The light will flash when the VSC or TRAC is operating.
Low fuel level warning light
Indicates that remaining fuel is approximately 2.6 gal. (9.7 L, 2.1
Imp.gal.) or less
→ Refuel the vehicle.
Seat belt reminder light (warning buzzer)*
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.
Master warning light
A buzzer sounds and the warning light comes on and flashes to
indicate that the master warning system has detected a malfunc-
tion.
→ P. 4 8 8
Warning lightWarning light/Details/Actions

4848-2. Steps to take in an emergency
ES350_OM_OM33C68U_(U)
*: Driver’s and front passenger’s seat belt warning buzzer:The driver’s seat belt warning buzzer sounds to alert the driver that his or her seat belt
is not fastened. Once the engine switch is turned to IGNITION ON mode, the
buzzer sounds for 6 seconds. If the vehicle reaches a speed of 12 mph (20 km/h), the
buzzer sounds once. If the seat belt is still unfastened after 30 seconds, the buzzer will
sound intermittently for 10 seconds. Then, if the seat belt is still unfastened, the buzzer
will sound in a different tone for 20 more seconds.
The front passenger’s seat belt warning buzzer sounds to alert the front passenger
that his or her seat belt is not fastened. The buzzer sounds once if the vehicle reaches
a speed of 12 mph (20 km/h). If the seat be lt is still unfastened after 30 seconds, the
buzzer will sound intermittently for 10 seconds. Then, if the seat belt is still unfastened,
the buzzer will sound in a different tone for 20 more seconds.
■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, “AIR BAG OFF”
indicator light, front passenger’s seat belt buckle switch, seat belt pretensioner assem-
blies, airbags, inte rconnecting wiring and power sources. ( →P. 3 6 )
Tire pressure warning light
When the light comes on:
Low tire inflation pressure such as
• Natural causes (→ P. 4 8 5 )
•Flat tire ( →P. 4 9 1 )
→ Adjust the tire inflation pressure to the specified level.
The light will turn off after a few minutes. In case the light does
not turn off even if the tire inflation pressure is adjusted, have the
system checked by your Lexus dealer.
When the light comes on after blinking for 1 minute:
Malfunction in the tire pressure warning system ( →P. 4 8 5 )
→ Have the system checked by your Lexus dealer.
(Flashes)
(If equipped)
“A F S O F F ” i n d i c a t o r Indicates a malfunction in the adaptive front-lighting system
→ Have the vehicle inspected by your Lexus dealer immediately.
Warning lightWarning light/Details/Actions

4858-2. Steps to take in an emergency
ES350_OM_OM33C68U_(U)
8
When trouble arises
■Front passenger detection sensor, seat belt reminder and warning buzzer
●If luggage is placed on the front passenger seat, the front passenger detection sensor
may cause the warning light to flash and the warning buzzer to sound even if a passen-
ger is not sitting in the seat.
●If a cushion is placed on the seat, the sensor may not detect a passenger, and the warn-
ing light may not operate properly.
■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.
■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 Lexus dealer as soon as
possible.
■When the tire pressure warning light comes on
Check the tire inflation pressure and adjust to the appropriate level. Pushing 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 temperature. In this case, adjusting
the tire inflation pressure will turn off the warning light (after a few minutes).
■When a tire is replaced with a spare tire
The compact spare tire is not equipped with a tire pressure warning valve and transmit-
ter. If a tire goes flat, the tire pressure warning light will not turn off even though the flat
tire has been replaced with the spare tire.
■Conditions that the tire pressure warning system may not function properly
→ P. 4 4 6
■If the tire pressure warning light freque ntly comes on after blinking for 1 minute
If the tire pressure warning light frequently comes on after blinking for 1 minute when the
engine switch is turned to IGNITION ON mode, have it checked by your Lexus dealer.
■Warning buzzer
In some cases, the buzzer may not be heard because of noisy place or an audio sound.

ES350_OM_OM33C68U_(U)
5459-2. Customization
9
Vehicle specifications
■Automatic light control system (→P. 1 6 5 )
■Lights (→P. 1 6 5 )
*:Except for Canada
■Intuitive parking assist (if equipped) ( →P. 223)
■Automatic air conditioning system ( →P. 3 6 8 )
FunctionDefault settingCustomized
setting
Adjust the sensitivity of the
ambient light sensor0-2 to 2O—O
Adjust the time elapsed
before the headlights auto-
matically turn off
30 seconds
Off
O—O60 seconds
90 seconds
Welcome light illumination
controlOnOff——O
123
FunctionDefault settingCustomized setting
Daytime running lights can be
disabled*OnOffO—O
123
FunctionDefault settingCustomized setting
Detection distance of the
front/rear center sensorFarNearO—O
Alert volume can be adjusted31 to 5O—O
Display setting
(when intuitive parking assist
is operating)All sensors displayedDisplay offO—O
123
FunctionDefault settingCustomized
setting
A/C Auto switch operationOnOffO—O
Exhaust gas sensor sensitivity0-3 to 3O—O
123

562What to do if... (Troubleshooting)
ES350_OM_OM33C68U_(U)
●The seat belt reminder light is flashing
Are the driver and the front passenger wearing the seat belts? ( →P. 4 8 3 )
●The parking brake indicator is on
Is the parking brake released? ( →P. 1 6 4 )
Depending on the situation, other type s of warning buzzer may also sound.
( → P. 482, 488)
●Did anyone inside the vehicle open a door during setting the alarm?
The sensor detects it and the alarm sounds. ( →P. 6 7 )
To stop the alarm, turn the engine switch to IGNITION ON mode or start the
engine.
●Is the electronic key left inside th e vehicle or the moon roof opened?
Check the message on the multi-information display. ( →P. 4 8 8 )
●When a warning light turns on or a warning message is displayed, refer to
P. 482, 488.
●Stop the vehicle in a safe place and replace the flat tire with the spare tire.
(→ P. 4 9 1 )
●Try the procedure for when the vehicle becomes stuck in mud, dirt, or snow.
(→ P. 5 1 3 )
A warning buzzer sounds during driving
An alarm is activate
d and the horn sounds
A warning buzzer sounds wh en 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

572Alphabetical index
ES350_OM_OM33C68U_(U)
Ornament lights .................................... 379
Outer foot lightsOuter foot lights ................................. 379
Replacing light bulbs ........................470
Wattage ..................................................524
Outside rear view mirrors
Adjusting and folding ........................ 128
Blind spot monitor ............................ 250
Linked mirror function when reversing ................................. 129
Mirror position memory .................... 117
Outside rear view mirror defoggers ............................ 372
Outside temperature display ..............76
Overheating ............................................ 510
Parking assist sensors
(intuitive parking assist) .................. 223
Parking brake
Operation ............................................... 164
Parking brake engaged warning buzzer ................................ 164
Parking lights
Light switch ............................................ 165
Replacing light bulbs ........................470
PCS (Pre-Collision System) Function ................................................... 187
Warning light ...................................... 483
Personal lights........................................380 Power easy access system...................117
Power outlets ......................................... 389
Power steering (Electric Power
Steering system)................................ 259
Warning light .......................................483
Power trunk opener and closer ........ 101
Power windows Door lock linked
window operation ........................... 132
Jam protection function......................131
Operation..................................................131
Window lock switch ............................131
Pre-Collision System (PCS) Function ....................................................187
Warning light .......................................483
Radar cruise control (dynamic radar cruise control)........................ 208
Radiator.....................................................437
Radio
*.......................................................296
RCTA (Rear Cross
Traffic Alert)........................................ 250
Rear personal lights ............................ 380
Rear side marker lights Light switch.............................................165
Replacing light bulbs ....................... 470
PR

574Alphabetical index
ES350_OM_OM33C68U_(U)
SeatsAdjustment ............................................... 116
Adjustment precautions .................... 116
Child seats/child restraint
system installation..............................55
Cleaning ...................................................417
Driving position memory .................. 117
Head restraints....................................... 121
Power easy access system .............. 117
Properly sitting in the seat ................28
Seat heaters ..........................................378
Seat position memory......................... 117
Seat ventilators ....................................378
Sensor
Automatic headlight system .......... 166
Inside rear view mirror ......................127
Intuitive parking assist ...................... 223
Lexus Safety System+....................... 182
Radar sensor ......................................... 182
Rain-sensing windshield wipers .................................................... 175
Service reminder indicators ................72
Shift lever Automatic transmission ................... 159
If the shift lever cannot be shifted from P ............. 162
Shift lever light ....................................... 379
Shift lock system......................................162
Side airbags ............................................... 35
Side marker lights Light switch ............................................ 165
Replacing light bulbs ............467, 470 Side mirrors
Adjusting and folding ........................128
Blind Spot Monitor ...........................250
Linked mirror function
when reversing.................................. 129
Mirror position memory ....................117
Side turn signal lights Replacing light bulbs ....................... 470
Turn signal lever ...................................163
Smart access system
with push-button startAntenna location................................. 108
Entry functions ....................................... 95
Starting the engine ..............................154
Snow tires .................................................266
Spare tire ................................................... 491 Inflation pressure................................ 523
Storage location ................................. 492
Spark plug ............................................... 520
Specifications........................................... 516
Speedometer ............................................. 76
Sport mode ............................................. 248
Steering lock ............................................ 156 Column lock release ......................... 157
Steering wheel Adjustment.............................................. 124
Audio switches
*................................ 276
Heated steering wheel ................... 378
Power easy access system ............... 117
Steering wheel
position memory ................................ 117
Stop lights
Replacing light bulbs ....................... 470
Storage feature ..................................... 382
Stuck If the vehicle becomes stuck..........513