sensor Lexus ES300h 2017 Workshop Manual

ES300h_OM_OM33C75U_(U)
3976-1. Using the air conditioning system and defogger
6
Interior features
NOTICE
■Humidity sensor
●Do not stick anything on the sensor
■To prevent 12-volt battery discharge
Do not leave the air conditioning system on longer than necessary when the hybrid sys-
tem is off.
In order to detect fog on the windshield, a sen-
sor which monitors the temperature of the
windshield, the surround humidity, etc. is
installed. (→P. 3 9 5 )
Follow these points to avoid damaging the sen-
sor:
●Do not disassemble the sensor
●Do not spray the glass cleaner on the sensor
or subject it to strong impacts

ES300h_OM_OM33C75U_(U)
4256-4. Using the other interior features
6
Interior features
NOTICE
■To avoid the compass malfunctions
Do not place magnets or any metal objects near the inside rear view mirror.
Doing this may cause the compass sensor to malfunction.
■To ensure normal operation of the compass
●Do not perform circling calibration of the compass in a place where the earth’s mag-
netic field is subject to interference by artificial magnetic fields.
●During calibration, do not operate electric systems (moon roof, power windows, etc.)
as they may interfere with the calibration.

ES300h_OM_OM33C75U_(U)
4357-1. Maintenance and care
7
Maintenance and care
■Aluminum wheels
●Remove any dirt immediately by using a neutral detergent. Do not use hard brushes or
abrasive cleaners. Do not use strong or harsh chemical cleaners.
Use the same mild detergent and wax as used on the paint.
●Do not use detergent on the wheels when they are hot, for example after driving for
long distance in the hot weather.
●Wash detergent from the wheels immediately after use.
■Bumpers and side moldings
Do not scrub with abrasive cleaners.
WA R N I N G
■When washing the vehicle
Do not apply water to the inside of the engine compartment. Doing so may cause the
electrical components, etc., to be damaged or catch fire.
■When cleaning the windshield (vehicles with rain-sensing windshield wipers)
●When the upper part of the windshield where the raindrop sensor is located is
touched by hand
●When a wet rag or similar is held close to the raindrop sensor
●If something bumps against the windshield
●If you directly touch the raindrop sensor bo dy or if something bumps into the raindrop
sensor
■Precautions regarding exhaust pipe
Exhaust gases cause exhaust pipe to become quite hot.
When washing the vehicle, be careful not to touch the pipe until they have cooled suffi-
ciently, as touching hot exhaust pipe can cause burns.
■Precaution regarding the Blind Spot Monitor (if equipped)
If the paint of the rear bumper is chipped or scratched, the system may malfunction. If
this occurs, consult your Lexus dealer.
Set the wiper switch to off.
If the switch is in “AUTO”, the wipers may oper-
ate unexpectedly in the following situations,
and may result in hands being caught or other
serious injuries and cause damage to the wiper
blades.
Off

5068-2. Steps to take in an emergency
ES300h_OM_OM33C75U_(U)
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. 2 0 0 )
• 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 7 8 )
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 AB S, 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. 5 1 1
Warning lightWarning light/Details/Actions

5078-2. Steps to take in an emergency
ES300h_OM_OM33C75U_(U)
8
When trouble arises
*: 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 power switch is turned to 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 inter-
mittently 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 8 )
Tire pressure warning light
When the light comes on:
Low tire inflation pressure such as
• Natural causes ( →P. 5 0 8 )
•Flat tire ( →P. 5 1 5 )
→ 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. 5 0 8 )
→ 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

5088-2. Steps to take in an emergency
ES300h_OM_OM33C75U_(U)
■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 12-volt battery charge becomes insufficient or the voltage temporarily drops,
the electric power steering system warnin g 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 6 9
■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
power switch is turned to ON mode, ha ve 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.

570
ES300h_OM_OM33C75U_(U)9-2. Customization
■Automatic light control system (
→P. 1 8 2 )
■Lights ( →P. 1 8 2 )
*:Except for Canada
■Intuitive parking assist (if equipped) ( →P. 2 4 1 )
■Automatic air conditioning system ( →P. 3 8 8 )
FunctionDefault settingCustomized
setting
Adjust the sensitivity of the
ambient light sensor0-2 to 2O—O
Adjust the time
elapsed before the headlights
automatically 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

588What to do if... (Troubleshooting)
ES300h_OM_OM33C75U_(U)
●The auto power off function will be operated if the vehicle is left in ACCES-
SORY or ON mode (the hybrid system is not operating) for a period of time.
( → P. 1 7 0 )
●The seat belt reminder light is flashing
Are the driver and the front passenger wearing the seat belts? ( →P. 5 0 6 )
●The parking brake indicator is on
Is the parking brake released? ( →P. 181)
Depending on the situation, other type s of warning buzzer may also sound.
( → P. 505, 511)
●Did anyone inside the vehicle open a door during setting the alarm?
The sensor detects it and the alarm sounds. ( →P. 7 8 )
To stop the alarm, turn the power switch to ON mode or start the hybrid system.
●Is the electronic key left inside th e vehicle or the moon roof opened?
Check the message on the multi-information display. ( →P. 511)
●When a warning light turns on or a warning message is displayed, refer to
P. 505, 511. The power switch is turned off automatically
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

590Alphabetical index
ES300h_OM_OM33C75U_(U)
Alphabetical index
A/CAir conditioning filter ........................ 479
Automatic air conditioning system ................................................. 388
Humidity sensor ................................. 397
Micro dust and pollen filter ........................................................393
ABS (Anti-lock Brake System) Function .................................................. 276
Warning light ...................................... 505
Adaptive Front-lighting System
(AFS) ....................................................... 183
AFS (Adaptive Front-lighting
System) ................................................... 183
Air conditioning filter .......................... 479
Air conditioning system Air conditioning filter ........................ 479
Automatic air conditioning system ................................................. 388
Humidity sensor ................................ 397
Micro dust and pollen filter ........................................................393 Airbags
Airbag operating conditions .......... 43
Airbag precautions for your child ....................................... 39
Airbag warning light ....................... 505
Correct driving posture .................... 30
Curtain shield airbag operating conditions ....................... 43
Curtain shield airbag precautions .......................................... 39
Front passenger occupant classification system......................... 46
General airbag precautions ........... 39
Locations of airbags.............................37
Modification and disposal of airbags................................................42
Side airbag operating conditions ............................................. 43
Side airbag precautions .................... 39
Side and curtain shield airbags operating conditions ....................... 43
Side and curtain shield
airbags precautions ......................... 39
SRS airbags ..............................................37
Alarm ............................................................78 Warning buzzer ................................ 505
Anchor brackets.......................................57
Antennas (smart access system with push-button start) .......................121
Anti-lock Brake System (ABS)
Function .................................................. 276
Warning light ...................................... 505
Approach warning (dynamic radar cruise control)........................ 233
Armrest ........................................................411
Assist grip .................................................. 414
Audio input ............................................. 299
A

600Alphabetical index
ES300h_OM_OM33C75U_(U)
Parking assist sensors (intuitive parking assist) ....................241
Parking brake
Operation .................................................181
Parking brake engaged warning buzzer ..................................181
Parking lights
Light switch ............................................ 182
Replacing light bulbs ....................... 495
PCS (Pre-Collision System) Function ................................................. 205
Warning light ...................................... 506
Personal lights......................................... 401
Power control unit .................................... 71
Power control unit coolant
Capacity ................................................ 545
Checking................................................ 457
Preparing and checking before winter ....................................284
Radiator ................................................. 458
Power easy access system ................ 130
Power outlets .......................................... 410
Power steering (Electric Power
Steering system) .................................277Warning light ...................................... 506
Power switch ........................................... 168 Power trunk opener and closer .........114
Power windows
Door lock linked window operation ...........................146
Jam protection function....................145
Operation................................................145
Window lock switch ..........................145
Pre-Collision System (PCS)
Function ..................................................205
Warning light ...................................... 506
Radar cruise control (dynamic radar cruise control).........................226
Radiator.................................................... 458
Radio
*........................................................ 316
RCTA (Rear Cross Traffic Alert)........................................ 268
Rear personal lights .............................. 401
Rear side marker lights Light switch.............................................182
Replacing light bulbs ....................... 495
Rear door sunshades............................ 412
Rear sunshade Operation................................................ 412
Reverse operation feature ..............413
P
R