2017 Lexus ES300h hybrid system malfunction

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ES300h_OM_OM33C75U_(U)
For your information
The Owner’s Manual provides instructions on the proper operation of this vehicle. The
driver should read the Owner’s Manual prior to driving the vehicle. Failure to follow the
instructions in the Owner’s Manual could lead to an accident, resulting in death or seri-
ous injury.
Please note that this manual applies to all models and explains all equipment, including
options. Therefore, you may find some explanations for equipment not installed on your
vehicle.
All specifications provided in this manual are current at the time of printing. However,
because of the Lexus policy of continual product improvement, we reserve the right to
make changes at any time without notice.
Depending on specifications, the vehicle shown in the illustrations may differ from your
vehicle in terms of color and equipment.
Approximately five hours after the hybrid system is turned off, you may hear sound com-
ing from under the vehicle for several minutes. This is the sound of a fuel evaporation
leakage check and, it does not indicate a malfunction.
A wide variety of non-genuine spare parts and accessories for Lexus vehicles are cur-
rently available in the market. You should know that Toyota does not warrant these prod-
ucts and is not responsible for their perfor mance, repair, or replacement, or for any
damage they may cause to, or adverse effect they may have on, your Lexus vehicle.
This vehicle should not be modified with non-genuine Lexus products. Modification with
non-genuine Lexus products could affect its performance, safety or durability, and may
even violate governmental regulations. In addition, damage or performance problems
resulting from the modification may not be covered under warranty.
Main Owner’s Manual
Noise from under vehicle after turning off the hybrid system
Accessories, spare parts and modification of your Lexus

701-2. Hybrid system
ES300h_OM_OM33C75U_(U)
■Sounds and vibrations specific to a hybrid vehicle
There may be no engine sound or vibration even though the vehicle is able to move with
the “READY” indicator is illuminated. For safety, apply the parking brake and make sure
to shift the shift lever to P when parked.
The following sounds or vibrations may occur when the hybrid system is operating and
are not a malfunction:
●Motor sounds may be heard from the engine compartment.
●Sounds may be heard from the hybrid battery (traction battery) behind the rear seats
when the hybrid system starts or stops.
●Relay operating sounds such as a snap or so ft clank will be emitted from the hybrid bat-
tery (traction battery), behind the rear se ats, when the hybrid system is started or
stopped.
●Sounds from the hybrid system may be heard when the trunk lid is open.
●Sounds may be heard from the transmission when the gasoline engine starts or stops,
when driving at low sp eeds, or during idling.
●Engine sounds may be heard when accelerating sharply.
●Sounds may be heard due to regenerative braking when the brake pedal is depressed
or as the accelerator pedal is released.
●Vibration may be felt when the gasoline engine starts or stops.
●Cooling fan sounds may be heard from the air intake vent on rear left seat.
■Vehicle proximity notification system
In the following cases, the vehicle proximity notification system may be difficult for sur-
rounding people to hear.
●In very noisy areas
●In the wind or the rain
Also, as the vehicle proximity notification system is installed on the front of the vehicle, it
may be more difficult to hear from the rear of the vehicle compared to the front.
■If “Proximity Notification System Malfunction” is displayed on the multi-information
display
The system may be malfunctioning. Have the vehicle inspected by your Lexus dealer.
■Maintenance, repair, recycling, and disposal
Contact your Lexus dealer regarding maintenance, repair, recycling and disposal. Do
not dispose of the vehicle yourself.
■Customization
Settings (e.g. on/off operation of the EV indicator) can be changed.
(Customizable features: →P. 5 6 2 )

721-2. Hybrid system
ES300h_OM_OM33C75U_(U)
There is an air intake vent beside the
rear left seat for the purpose of cooling
the hybrid battery (traction battery). If
the vent becomes blocked, the hybrid
battery may overheat, leading to a
reduction in hybrid battery output.
When a certain level of impact is detected by the impact sensor, the emergency
shut off system blocks the high voltage current and stops the fuel pump to mini-
mize the risk of electrocution and fuel leakage. If the emergency shut off system
activates, your vehicle will not restart. To restart the hybrid system, contact your
Lexus dealer.
A message is automatically displayed when a malfunction occurs in the hybrid
system or an improper operation is attempted.
If a warning message is shown on the
multi-information display, read the
message and follow the instructions.
Hybrid battery (traction battery) air intake vent
Emergency shut off system
Hybrid warning message

761-3. Theft deterrent system
ES300h_OM_OM33C75U_(U)
Immobilizer system
The indicator light flashes after the
power switch has been turned off to
indicate that the system is operating.
The indicator light stops flashing after
the power switch has been turned to
ACCESSORY or ON mode to indi-
cate that the system has been canceled.
■System maintenance
The vehicle has a maintenance-free type immobilizer system.
■Conditions that may cause the system to malfunction
●If the grip portion of the key is in contact with a metallic object
●If the key is in close proximity to or touching a key to the security system (key with a
built-in transponder chip) of another vehicle
The vehicle’s keys have built-in transponder chips that prevent the hybrid sys-
tem from starting if a key has not been previously registered in the vehicle’s
on-board computer.
Never leave the keys inside the vehicle when you leave the vehicle.
This system is designed to help prevent vehicle theft but does not guarantee
absolute security against all vehicle thefts.

ES300h_OM_OM33C75U_(U)
832. Instrument cluster
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Instrument cluster
Warning lights inform the driver of malfunctions in the indicated vehicle’s sys-
tems.
*1: These lights turn on when the power switch is turned to ON mode to indicate that asystem check is being performe d. They will turn off after the hybrid system is on, or
after a few seconds. There may be a malfunction in a system if a light does not come
on, or turn off. Have the vehicle inspected by your Lexus dealer.
*2: The light flashes to indicate a malfunction.
Warning lights
*1
(U.S.A.)
Brake system warning light
( → P. 5 0 5 )*1Electric power steering
system warning light
(→ P. 5 0 6 )
*1
(Canada)
Brake system warning light
(→ P. 5 0 5 )*1Slip indicator light
(→ P. 5 0 6 )
*1
(U.S.A.)
Malfunction indicator lamp
(→ P. 5 0 5 )*1Brake system warning light
(→ P. 505)
*1
(Canada)
Malfunction indicator lamp
(→ P. 5 0 5 )Low fuel level warning light
(→ P. 5 0 6 )
*1SRS warning light
(→ P. 5 0 5 )Seat belt reminder light
(→ P. 5 0 6 )
*1
(U.S.A.)
ABS warning light
(→ P. 5 0 5 )*1Master warning light
(→ P. 5 0 6 )
*1
(Canada)
ABS warning light
(→ P. 5 0 5 )*1Tire pressure warning light
(→ P. 5 0 7 )
*1, 2
(if equipped)
PCS warning light
(→ P. 5 0 6 )
*1, 2
(if equipped)
“AFS OFF” indicator
(→
P. 5 0 7)

ES300h_OM_OM33C75U_(U)
852. Instrument cluster
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Instrument cluster
*1: These lights turn on when the power switch is turned to ON mode to indicate that asystem check is being performe d. They will turn off after the hybrid system is on, or
after a few seconds. There may be a malfunction in a system if a light does not come
on, or turn off. Have the vehicle inspected by your Lexus dealer.
*2: The light flashes to indicate that the system is operating.
*3: The light turns on when the system is turned off.
*4: In order to confirm operation, the BSM outside rear view mirror indicators illuminate in the following situations:
• When the power switch is turned to ON mode while the BSM main switch is set to ON.
• When the BSM main switch is set to ON while the power switch is in ON mode.
If the system is functioning correctly, the BSM outside rear view mirror indicators will
turn off after a few seconds.
If the BSM outside rear view mirror indicators do not illuminate or do not turn off,
there may be a malfunction with the system. If this occurs, have the vehicle inspected
by your Lexus dealer.
*5: This light illuminates on the outside rear view mirrors.
*6: This light illuminates on the center panel.
*7: When the outside temperature is approximately 37°F (3°C) or lower, the indicator
will flash for approximately 10 seconds, then stay on.
WA R N I N G
■If a safety system warning light does not come on
Should a safety system light such as the ABS and SRS warning light not come on when
you start the hybrid system, this could mean that these systems are not available to help
protect you in an accident, which could result in death or serious injury. Have the vehi-
cle inspected by your Lexus dealer immediately if this occurs.

86
ES300h_OM_OM33C75U_(U)2. Instrument cluster
Gauges and meters
The units used on the speedometer may differ depending on the target region.
Engine coolant temperature gauge
Displays the engine coolant temperature
Tachometer/Hybrid System Indicator
Tachometer:
Displays the engine speed in revolutions per minute.
Hybrid System Indicator:
Displays hybrid system output or regeneration level. (→
P. 8 8 )
Outside temperature
Displays the outside temperature within the range of -40 °F (-40 °C) to 122 °F
(50 °C). Low outside temperature indicator comes on when the ambient temperature
is 37 °F (3 °C) or lower.
Clock
Time can be adjusted or a clock format can be set from (settings display) of
the multi-information display. ( →P. 9 1 )
Multi-information display
Presents the driver with a variety of vehicle data ( →P. 9 1 )
Displays warning messages in case of a malfunction ( →P. 5 1 1 )
Speedometer
Displays the vehicle speed
Fuel gauge
Displays the quantity of fuel remaining in the tank
Shift position and shift range
Displays the selected shift position or selected shift range ( →P. 1 7 5 )
1
2
3
4
5
6
7
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ES300h_OM_OM33C75U_(U)
892. Instrument cluster
2
Instrument cluster
■Tachometer
Hybrid System Indicator switches to the tachometer when driving mode is in sport mode.
The settings of the tachometer display can be changed on the multi-information display.
( → P. 9 1 )
■Engine speed
Engine speed is precisely controlled in order to help improve fuel efficiency and reduce
exhaust emissions etc.
There are times when the engine speed that is displayed may differ even when vehicle
operation and driving conditions are the same.
■Outside temperature display
●In the following situations, the correct outside temperature may not be displayed, or the
display may take longer than normal to change.
• When stopped, or driving at low speeds (less than 12 mph [20 km/h])
• When the outside temperature has changed suddenly (at the entrance/exit of a garage, tunnel, etc.)
• When the vehicle is parked in direct sunlight
●When “--” or “E” is displayed, the system may be malfunctioning.
Take your vehicle to your Lexus dealer.
■Pop-up display
In some situations, a pop-up display will be temporarily displayed on the multi-informa-
tion display or the odometer/trip meter/ maintenance required information screen.
The pop-up display function can be set on/off. ( →P. 5 6 4 )
■Liquid crystal display
Small spots or light spots may appear on the display. This phenomenon is characteristic
of liquid crystal displays, and there is no problem continuing to use the display.
■Customization
The meter display can be customized on the multi-information display.
(Customizable features →P. 5 6 2 )
WA R N I N G
■The information display at low temperatures
Allow the interior of the vehicle to warm up before using the liquid crystal information
display. At extremely low temperatures, the information display monitor may respond
slowly, and display changes may be delayed.
For example, there is a lag between the driver’s shifting and the new gear number
appearing on the display. This lag could cause the driver to downshift again, causing
rapid and excessive engine braking and possibly an accident resulting in personal
death or injury.