Lexus RX 450h Owner's Manual page 527

Brake hold operated indicator
■
Warning light
(flashes)
Master warning light
■
Warning light
Warning buzzer
■
In some cases, the buzzer may not be heard
due to being in a noisy location or audio
sound.
Front passenger detection sensor, seat
■
belt reminder and warning buzzer
If luggage is placed on the front passen-
●
ger seat, the front passenger detection
sensor may cause the warning light to
flash and the warning buzzer to sound
even if a passenger is not sitting in the
seat.
If a cushion is placed on the seat, the sen-
●
sor may not detect a passenger, and the
warning light may not operate properly.
If the malfunction indicator lamp comes
■
on while driving
The malfunction indicator lamp will come
on if the fuel tank becomes completely
empty. If the fuel tank is empty, refuel the
vehicle immediately. The malfunction indi-
cator lamp will go off after several trips.
If the malfunction indicator lamp does not
go off, contact your Lexus dealer as soon as
possible.
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
warning light may come on and the warning
� � � � � � � � � � � � � � � � �
Indicates a malfunction in the brake hold system
 Have the vehicle inspected by your Lexus dealer immediately.
A buzzer sounds and the warning light comes on and flashes to indicate
that the master warning system has detected a malfunction.
 P.527
7-2. Steps to take in an emergency
Details/Actions
Details/Actions
buzzer may sound.
When the tire pressure warning light
■
comes on (vehicles with the tire pres-
sure warning system)
Inspect the tires to check if a tire is punc-
tured.
If a tire is punctured: P.531
If none of the tires are punctured:
Turn the power switch off then turn it to ON
mode. Check if the tire pressure warning
light comes on or blinks.
 If the tire pressure warning light blinks for
1 minute then stays on
There may be a malfunction in the tire
pressure warning system. Have the vehicle
inspected by your Lexus dealer immedi-
ately.
 If the tire pressure warning light comes
on
1 After the temperature of the tires has
lowered sufficiently, check the inflation
pressure of each tire and adjust them to
the specified level.
If the warning light does not turn off
2
even after several minutes have
elapsed, check that the inflation pres-
sure of each tire is at the specified level
and perform initialization. (P.487)
If the warning light does not turn off several
minutes after the initialization has been per-
formed, have the vehicle inspected by your
Lexus dealer immediately.
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