Page 513 of 612

5138-2. Steps to take in an emergency
8
When trouble arises
IS300h_EE(OM53C61E)
Indicates a malfunction in the EPS (Electric Power Steer-
ing) system
A buzzer also sounds.
→Have the vehicle inspected by any authorized Lexus
dealer or repairer, or another duly qualified and
equipped professional.
Indicates that the vehicle is being driven at 5 km/h (3
mph) or more with the parking brake still engaged
A buzzer also sounds.
→Release the parking brake.
Indicates a malfunction in:
• The SRS airbag system; or
• The seat belt pretensioner system
A buzzer also sounds.
→Have the vehicle inspected by any authorized Lexus
dealer or repairer, or another duly qualified and
equipped professional.
Indicates a malfunction in:
•The ABS; or
• The brake assist system
A buzzer also sounds.
→Have the vehicle inspected by any authorized Lexus
dealer or repairer, or another duly qualified and
equipped professional.
Indicates that the engine coolant temperature is too high
A buzzer also sounds.
→P. 5 5 2
(If equipped)
Indicates that the radar sensor is dirty or covered with
ice
A buzzer also sounds.
→Clean the sensor.
Wa r n i n g m e s s a g eDetails/Actions
(Flashes)
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5148-2. Steps to take in an emergency
IS300h_EE(OM53C61E)
(If equipped)
Indicates that the dynamic radar cruise control system is
unable to judge vehicle-to-vehicle distance
A buzzer also sounds.
→Tu r n o f f s n o w m o d e .
If the windshield wipers are on, turn them off or set
them to a mode other than AUTO or high speed
wiper operation.
(If equipped)
Indicates that the LDA (Lane Departure Alert) system is
suspended
The camera sensor temperature is higher than the
operation temperature range.
A buzzer also sounds.
→Restart the LDA after driving for a while.
(If equipped)
Indicates that:
• The grille shutter system cannot operate; or
• The grille shutter is dirty or covered with ice
A buzzer also sounds.
→Have the vehicle inspected by any authorized Lexus
dealer or repairer, or another duly qualified and
equipped professional.
(If equipped)
Indicates that a Blind Spot Monitor sensor or the sur-
rounding area on the bumper is dirty or covered with ice
A buzzer also sounds.
→Clean the sensor and its surrounding area on the
bumper.
(If equipped)
Indicates a malfunction in:
• The cruise control system; or
• The dynamic radar cruise control system
Press the “ON/OFF” button once to deactivate the
system, and then press the button again to reactivate
the system.
A buzzer also sounds.
→Have the vehicle inspected by any authorized Lexus
dealer or repairer, or another duly qualified and
equipped professional.
(If equipped)
Indicates a malfunction in the LDA (Lane Departure
Alert) system
A buzzer also sounds.
→Have the vehicle inspected by any authorized Lexus
dealer or repairer, or another duly qualified and
equipped professional.
Wa r n i n g m e s s a g eDetails/Actions
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5158-2. Steps to take in an emergency
8
When trouble arises
IS300h_EE(OM53C61E)
(If equipped)
Indicates a malfunction in the PCS (Pre-Crash Safety
system)
A buzzer also sounds.
→Have the vehicle inspected by any authorized Lexus
dealer or repairer, or another duly qualified and
equipped professional.
(If equipped)
Indicates a malfunction in the BSM (Blind Spot Monitor)
system
A buzzer also sounds.
→Have the vehicle inspected by any authorized Lexus
dealer or repairer, or another duly qualified and
equipped professional.
Indicates abnormal engine oil pressure
A buzzer also sounds.
→Immediately stop the vehicle in a safe place and
contact any authorized Lexus dealer or repairer, or
another duly qualified and equipped professional.
Indicates a malfunction in:
• The regenerative brake system; or
• The electronically controlled brake system
A buzzer also sounds.
→Immediately stop the vehicle in a safe place and
contact any authorized Lexus dealer or repairer, or
another duly qualified and equipped professional.
Indicates that the Pop Up Hood system has operated
A buzzer also sounds.
→Have the vehicle inspected by any authorized Lexus
dealer or repairer, or another duly qualified and
equipped professional.
Indicates a malfunction in the Pop Up Hood system
A buzzer also sounds.
→Have the vehicle inspected by any authorized Lexus
dealer or repairer, or another duly qualified and
equipped professional.
Indicates that the hybrid system was stopped while driv-
ing
A buzzer also sounds.
→Operate the steering wheel with more force than
usual.
Wa r n i n g m e s s a g eDetails/Actions
(Flashes)
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5168-2. Steps to take in an emergency
IS300h_EE(OM53C61E)
Indicates that the power switch is turned off or turned to
ACCESSORY mode and the driver’s door is opened
while the lights are turned on
A buzzer also sounds.
→Turn the lights off.
(If equipped)
Indicates that the moon roof is not fully closed (with the
power switch off, and the driver’s door open)
A buzzer also sounds.
→Close the moon roof.
Indicates that the windows are not fully closed (with the
power switch off, and the driver’s door open)
A buzzer also sounds.
→Close all the windows.
(If equipped)
Indicates that the windows and the moon roof are not
fully closed (with the power switch off, and the driver’s
door open)
A buzzer also sounds.
→Close all the windows and the moon roof.
Indicates a malfunction in the brake override system
A buzzer also sounds.
→Have the vehicle inspected by any authorized Lexus
dealer or repairer, or another duly qualified and
equipped professional.
Indicates that engine oil level is low
A buzzer also sounds.
→Check the level of engine oil, and add if necessary.
Indicates that the hybrid system has overheated
This message may be displayed when driving under
severe operating conditions. (For example, when driv-
ing up a long steep hill.)
A buzzer also sounds.
→Stop and check. (→P. 552)
Wa r n i n g m e s s a g eDetails/Actions
(Flashes)
(Flashes)
(Flashes)
(Flashes)
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Page 517 of 612

5178-2. Steps to take in an emergency
8
When trouble arises
IS300h_EE(OM53C61E)
Indicates a malfunction in:
• The automatic headlight leveling system; or
• The Automatic High Beam system (if equipped)
• The LED headlight system (if equipped)
A buzzer also sounds.
→Have the vehicle inspected by any authorized Lexus
dealer or repairer, or another duly qualified and
equipped professional.
Indicates that the accelerator and brake pedal are being
depressed simultaneously
→Release the accelerator or brake pedal.
Indicates that the cooling performance of the hybrid bat-
tery (traction battery) has dropped
→Have the vehicle inspected by any authorized Lexus
dealer or repairer, or another duly qualified and
equipped professional.
Indicates that the washer fluid level is low
→Add washer fluid.
Indicates that remaining fuel is approximately 10 L (2.6
gal., 2.2 Imp. gal.) or less
→Refuel the vehicle.
Indicates that the TRC (Traction Control) system has
been deactivated
→Tu r n t h e T R C o n . (→P. 288)
(If equipped)
Indicates that all maintenance according to the driven
distance on the maintenance schedule
*1 should be per-
formed soon.
→If necessary, perform maintenance.
Wa r n i n g m e s s a g eDetails/Actions
(Flashes)
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5188-2. Steps to take in an emergency
IS300h_EE(OM53C61E)
(If equipped)
Indicates that all maintenance listed in the maintenance
schedule*1 corresponding to the current vehicle mile-
age is necessary.
(The indicator will not work properly unless the mainte-
nance data has been reset.)
→Perform the necessary maintenance. Please reset
the maintenance data after the maintenance is per-
formed (→P. 4 4 2 )
(If equipped)
Indicates that the Automatic High Beam switch is
pressed while the headlights are in low beam.
→Turn the high beam on and press the Automatic
High Beam switch again.
(If equipped)
Indicates that, since the VSC (Vehicle Stability Control)
system was turned off, the pre-crash brake system oper-
ation is stopped
→Tu r n t h e V S C o n . (→P. 2 8 8 )
(If equipped)
Indicates that the PCS (Pre-Crash Safety system) is not
currently functional because the grille cover or the sen-
sor is dirty
→Check the grille cover and the sensor and clean
them if they are dirty.
Indicates that operation of large electricity consuming
systems such as the air conditioning system are sus-
pended
→Stop using unnecessary electric components to
reduce electricity consumption. Wait a while until
the electric power supply is restored.
(If equipped)
Indicates that the LDA (Lane Departure Alert) system
cannot be used because the vehicle speed is lower than
approximately 50 km/h (32 mph)
→Drive the vehicle at 50 km/h (32 mph) or higher.
Wa r n i n g m e s s a g eDetails/Actions
(Flashes)
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5198-2. Steps to take in an emergency
8
When trouble arises
IS300h_EE(OM53C61E)
*1: Refer to the separate “Lexus Service Booklet” or “Lexus Warranty Booklet” for the
maintenance interval applicable to your vehicle.
*2: For the EV drive mode operating conditions: →P. 2 1 4
Indicates that the EV drive mode is not available*2
The reason the EV drive mode is not available (the
vehicle is idling, hybrid battery [traction battery]
charge is low, speed is higher than the EV drive mode
operating speed range, accelerator pedal is
depressed too much) may be displayed.
A buzzer also sounds.
→Use the EV drive mode when it becomes available.
Indicates that the EV drive mode has been automatically
canceled
*2
The reason the EV drive mode is not available (the
hybrid battery [traction battery] charge is low, speed is
higher than the EV drive mode operating speed
range, accelerator pedal is depressed too much) may
be displayed.
A buzzer also sounds.
→Drive the vehicle for a while.
Wa r n i n g m e s s a g eDetails/Actions
(Except F
SPORT models)(F SPORT
models)
(Flashes) (Flashes)
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5208-2. Steps to take in an emergency
IS300h_EE(OM53C61E)
■Warning messages
The warning message illustrations used are intended as examples, and may differ from
the image that is actually displayed on the multi-information display.
■Warning message in radar cruise mode (if equipped)
In the following situations, the warning message may not be displayed even if vehicle-to-
vehicle distance decreases:
●When your vehicle and the vehicle ahead are traveling at the same speed or the vehicle
ahead is traveling more quickly than your vehicle
●When the vehicle ahead is traveling at a very low speed
●Immediately after cruise control speed is set
●At the instant the accelerator pedal is depressed
■The LDA (Lane Departure Alert) lane departure warning function (if equipped)
In the following situations, the warning message will not be displayed even if a lane line is
crossed.
●When the vehicle speed deviates from the operating range of the LDA system func-
tions
●When the lane lines cannot be recognized
■After changing the engine oil (if equipped)
Make sure to reset the oil change system. (→P. 4 4 2 )
■Warning buzzer
→P. 5 0 7
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