Page 527 of 628
5138-2. Steps to take in an emergency
8
When trouble arises
IS300h_EE(OM53B95E)
NOTICE
Precaution when installing a different tire
When differently constructed tires or tires of different makers, models or tread
patterns are installed, the tire pressure warning system may not operate prop-
erly.
Page 528 of 628
5148-2. Steps to take in an emergency
IS300h_EE(OM53B95E)
Master warning light
The master warning light also comes on or flashes in order to indicate that a
message is currently being displayed on the multi-information display.
Multi-information display
If any of the warning lights come on again after the following actions
have been performed, contact any authorized Lexus dealer or repairer, or
another duly qualified and equipped professional.
If a warning message is displayed
If a warning is shown on the multi-information display, stay calm and
perform the following actions:
Except F SPORT modelsF SPORT models (when the main
meter is in the center position)
F SPORT models (when the
main meter is in the right-side
position)
1
2
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5158-2. Steps to take in an emergency
8
When trouble arises
IS300h_EE(OM53B95E)
Warning message and warning buzzer list
Warning messageDetails/Actions
(If equipped)
Indicates that:
• There is a high possibility of a frontal collision;
or
• The pre-crash braking function is operating
A buzzer also sounds.
Slow the vehicle by applying the brakes.
Indicates that the hybrid system was stopped with
the shift lever not in P
A buzzer also sounds.
Shift the shift lever to P.
Indicates that the hybrid system was stopped while
driving
A buzzer also sounds.
Stop the vehicle in a safe place such as the shoul-
der of a road.
(If equipped)
Indicates that your vehicle is nearing the vehicle
ahead (in vehicle-to-vehicle distance mode)
A buzzer also sounds.
Slow the vehicle by applying the brakes.
(If equipped)
Alerts the driver that the vehicle has deviated from
the lane (while the LDA [Lane Departure Alert]
system is operating)
The lane line on the side the vehicle has deviated
from flashes in yellow.
The warning buzzer sounds continuously.
Check around the vehicle and back to inside of
the lane lines.
(Flashes)
(Flashes)
(Flashes)
Page 530 of 628
5168-2. Steps to take in an emergency
IS300h_EE(OM53B95E)
Indicates that:
• The brake fluid level is low; or
• The brake system is malfunctioning
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 profes-
sional. Continuing to drive the vehicle may be
dangerous.
Indicates a malfunction in the hybrid 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 profes-
sional.
Indicates that one or more of the doors is not fully
closed
The system also indicates which doors are not
fully closed.
If the vehicle reaches a speed of 5 km/h (3 mph),
flashes and a buzzer sounds to indicate
that the door(s) are not yet fully closed.
Make sure that all the doors are closed.
Indicates that the hood is not fully closed
If the vehicle reaches a speed of 5 km/h (3 mph),
flashes and a buzzer sounds to indicate
that the hood is not yet fully closed.
Close the hood.
Indicates that the trunk is not fully closed
If the vehicle reaches a speed of 5 km/h (3 mph),
flashes and a buzzer sounds to indicate
that the trunk is not yet fully closed.
Close the trunk.
(If equipped)
Indicates a malfunction in the Lexus parking
assists-sensor
The assist-sensors flash.
A buzzer also sounds.
Have the vehicle inspected by any authorized
Lexus dealer or repairer, or another duly quali-
fied and equipped professional.
Warning messageDetails/Actions
Page 531 of 628
5178-2. Steps to take in an emergency
8
When trouble arises
IS300h_EE(OM53B95E)
(If equipped)
Indicates that a Lexus parking assist-sensor is dirty
or covered with ice
A buzzer also sounds.
Clean the sensor.
Indicates that the accelerator pedal is depressed
while the shift position is in N
A buzzer also sounds.
Release the accelerator pedal and shift the shift
lever to D, S or R.
Indicates that the hybrid battery (traction battery)
power has dropped because a long period of time
has elapsed after shifting the shift lever to N
A buzzer also sounds.
Restart the hybrid system when starting the vehi-
cle.
Indicates a malfunction in the hybrid 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 profes-
sional.
Indicates that the hybrid battery (traction battery) is
low
A buzzer also sounds.
When stopping the vehicle for a long period of
time, shift the shift lever to P. The hybrid battery
(traction battery) cannot be charged with the
shift lever in N.
Warning messageDetails/Actions
(Flashes)
(Flashes)
(Flashes)
Page 532 of 628
5188-2. Steps to take in an emergency
IS300h_EE(OM53B95E)
Indicates a malfunction in the EPS (Electric Power
Steering) system
A buzzer also sounds.
Have the vehicle inspected by any authorized
Lexus dealer or repairer, or another duly quali-
fied 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 quali-
fied 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 quali-
fied and equipped professional.
Indicates that the engine coolant temperature is too
high
A buzzer also sounds.
P. 5 5 6
(If equipped)
Indicates that the radar sensor is dirty or covered
with ice
A buzzer also sounds.
Clean the sensor.
Warning messageDetails/Actions
(Flashes)
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5198-2. Steps to take in an emergency
8
When trouble arises
IS300h_EE(OM53B95E)
(If equipped)
Indicates that the dynamic radar cruise control sys-
tem is unable to judge vehicle-to-vehicle distance
A buzzer also sounds.
Turn off snow mode.
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) sys-
tem 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 quali-
fied and equipped professional.
(If equipped)
Indicates that a Blind Spot Monitor sensor or the
surrounding 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 reacti-
vate the system.
A buzzer also sounds.
Have the vehicle inspected by any authorized
Lexus dealer or repairer, or another duly quali-
fied and equipped professional.
(If equipped)
Indicates a malfunction in the LDA (Lane Depar-
ture Alert) system
A buzzer also sounds.
Have the vehicle inspected by any authorized
Lexus dealer or repairer, or another duly quali-
fied and equipped professional.
Warning messageDetails/Actions
Page 534 of 628
5208-2. Steps to take in an emergency
IS300h_EE(OM53B95E)
(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 quali-
fied 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 quali-
fied 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 profes-
sional.
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 profes-
sional.
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 quali-
fied 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 quali-
fied and equipped professional.
Indicates that the hybrid system was stopped while
driving
A buzzer also sounds.
Operate the steering wheel with more force than
usual.
Warning messageDetails/Actions
(Flashes)
