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841-2. Hybrid system
IS300h_EE(OM53B95E)
There is an air intake vent on the
right side of the rear seatback for
the purpose of cooling the hybrid
battery (traction battery). If the vent
becomes blocked, the hybrid battery
may overheat, leading to a reduc-
tion in hybrid battery output.
When a certain level of impact is detected by the impact sensor, the emer-
gency shut off system blocks the high voltage current and stops the fuel
pump to minimize the risk of electrocution and fuel leakage. If the emer-
gency shut off system activates, your vehicle will not restart. To restart
the hybrid system, contact any authorized Lexus dealer or repairer, or
another duly qualified and equipped professional.
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 instruc-
tions.
(P. 513)
Hybrid battery (traction battery) air vent
Emergency shut off system
Hybrid warning message
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851-2. Hybrid system
1
For safety and security
IS300h_EE(OM53B95E)
If a warning light comes on, a warning message is displayed, or the 12-volt bat-
tery is disconnected
The hybrid system may not start. In this case, try to start the system again. If the
“READY” indicator does not come on, contact any authorized Lexus dealer or
repairer, or another duly qualified and equipped professional.
Running out of fuel
When the vehicle has run out of fuel and the hybrid system cannot be started,
refuel the vehicle with at least enough gasoline to make the low fuel level warn-
ing light (P. 509) go off. If there is only a small amount of fuel, the hybrid sys-
tem may not be able to start. (The minimum amount of fuel to add to make the
low fuel level warning light go out is about 10 L [2.7 gal., 2.2 Imp. gal.], when
the vehicle is on a level surface. This value may vary when the vehicle is on a
slope.)
Electromagnetic waves
High voltage parts and cables on hybrid vehicles incorporate electromagnetic
shielding, and therefore emit approximately the same amount of electromag-
netic waves as conventional gasoline powered vehicles or home electronic
appliances.
Your vehicle may cause sound interference in some third party-produced radio
parts.
Hybrid battery (traction battery)
The hybrid battery (traction battery) has a limited service life. The lifespan of the
hybrid battery (traction battery) can change in accordance with driving style and
driving conditions.
Declaration of conformity
This model conforms to hydrogen emissions according to regulation ECE100
(Battery electric vehicle safety).
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991-3. Theft deterrent system
1
For safety and security
IS300h_EE(OM53B95E)
The intrusion sensor detects intruders or movement in the vehicle.
The tilt sensor detects changes in vehicle inclination, such as when the
vehicle is towed away.
This system is designed to deter and prevent vehicle theft but does not
guarantee absolute security against all intrusions.
Setting the intrusion sensor and tilt sensor
The intrusion sensor and tilt sensor will be set automatically when the
alarm is set. (P. 9 6 )
Canceling the intrusion sensor and tilt sensor
If you are leaving pets or other moving things inside the vehicle, make
sure to disable the intrusion sensor and tilt sensor before setting the
alarm, as they will respond to movement inside the vehicle.
Turn the power switch off.
Press the intrusion sensor and
tilt sensor cancel switch.
Press the switch again to re-
enable the intrusion sensor and
tilt sensor.
Each time the intrusion sensor is
canceled/set, a message will be
shown on the multi-information
display in the instrument cluster.
Intrusion sensor and tilt sensor (if equipped)
1
2
Page 104 of 628
103
2Instrument cluster
IS300h_EE(OM53B95E)
2. Instrument cluster
Warning lights and
indicators ........................ 104
Gauges and meters ............ 109
Multi-information display..115
Energy monitor/
consumption screen ........ 121
Page 105 of 628
104
IS300h_EE(OM53B95E)2. Instrument cluster
Except F SPORT models
F SPORT models
The units used on the meters may differ depending on the target region.
Warning lights and indicators
The warning lights and indicators on the instrument cluster and center
panel inform the driver of the status of the vehicle’s various systems.
For the purpose of explanation, the following illustrations display all
warning lights and indicators illuminated.
Page 112 of 628

1112. Instrument cluster
2
Instrument cluster
IS300h_EE(OM53B95E)
F SPORT models (when the main meter is in the right-side position)
The units used on the meters may differ depending on the target region.
Engine coolant temperature gauge
Displays the engine coolant temperature
Hybrid System Indicator
Displays hybrid system output or regeneration level (P. 114)
This display changes to a tachometer depending on the drive mode, and can be
set to show the tachometer in any drive mode on the settings display. (P.
119)
Outside temperature
Displays the outside temperature within the range of -40°C (-40°F) to 50°C
(122°F). Low outside temperature indicator comes on when the ambient tem-
perature is 3°C (37°F) or lower.
Shift position and shift range (P. 216)
Speedometer
Fuel gauge
Multi-information display
Presents the driver with a variety of vehicle data (P. 1 1 6 )
Displays warning messages in case of a malfunction (P. 513)
Odometer and trip meter display
Odometer:
Displays the total distance the vehicle has been driven
Trip meter:
Displays the distance the vehicle has been driven since the meter was last
reset. Trip meters “A” and “B” can be used to record and display different dis-
tances independently.
1
2
3
4
5
6
7
8
Page 113 of 628
1122. Instrument cluster
IS300h_EE(OM53B95E)
Odometer/Trip meter
Switches between odometer and
trip meter displays. When the trip
meter is displayed, pressing and
holding the button will reset the
trip meter.
Main meter (F SPORT models)
Moves between center and right-
side positions.
Changing the display
Page 114 of 628
1132. Instrument cluster
2
Instrument cluster
IS300h_EE(OM53B95E)
The brightness of the instrument panel lights can be adjusted.
Darker
Brighter
The meters and display illuminate when
The power switch is in ON mode.
Instrument panel brightness adjustment
The instrument panel brightness levels when the tail lights are on and off can be
adjusted individually. However, when the surroundings are bright (daytime, etc.),
turning on the tail lights will not change the instrument panel brightness.
Instrument panel light control
1
2