Srs Warning Light; Front Passenger Detection Sensor, Seat Belt Reminder And Warning Buzzer; Electric Power Steering System Warning Light (Warning Buzzer); When The Tire Pressure Warning Light Comes On - Lexus RX 450H Owner's Manual

SRS warning light

■
This warning light system monitors the airbag sensor assembly, front impact sensors, side
impact sensors (front door), side impact sensors (rear), driver's seat position sensor,
driver's seat belt buckle switch, front passenger occupant classification system (ECU and
sensors), "AIR BAG ON" indicator light, "AIR BAG OFF" indicator light, front passen-
ger's seat belt buckle switch, driver's seat belt pretensioner, front passenger's seat belt
pretensioner and force limiter, airbags, interconnecting wiring and power sources.
(→P. 38)

Front passenger detection sensor, seat belt reminder and warning buzzer

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If luggage is placed on the front passenger seat, the front passenger detection sensor
●
may cause the warning light to flash and the warning buzzer to sound even if a passen-
ger is not sitting in the seat.
If a cushion is placed on the seat, the sensor may not detect a passenger, and the warn-
●
ing light may not operate properly.

Electric power steering system warning light (warning buzzer)

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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 buzzer
may sound.
If the malfunction indicator lamp comes on while driving
■
First check the following:
Is the fuel tank empty?
●
If it is, fill the fuel tank immediately.
Is the fuel tank cap loose?
●
If it is, tighten it securely.
The light will go off after several driving trips.
If the light does not go off even after several trips, contact your Lexus dealer as soon as
possible.

When the tire pressure warning light comes on

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Inspect the tires to check if a tire is punctured.
If a tire is punctured: →P. 550
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 comes on

After the temperature of the tires has lowered sufficiently, check the inflation pressure
1
of each tire and adjust them to the specified level.
If the warning light does not turn off even after several minutes have elapsed, check
2
that the inflation pressure of each tire is at the specified level and perform initialization.
(→P. 491)
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.
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 immediately.
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7-2. Steps to take in an emergency
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