Lexus IS300H 2017 Manual page 578

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8-2. Steps to take in an emergency
Warning light
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: Parking brake engaged warning buzzer:
P. 587
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: Open door warning buzzer:
P. 583
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: Seat belt warning buzzer:
The seat belt warning buzzer sounds to alert the driver, front passenger and rear pas-
sengers that his or her seat belt is not fastened. The buzzer sounds for 30 seconds
after the vehicle reaches a speed of 20 km/h (12 mph). Then, if the seat belt is still
unfastened, the buzzer will sound in a different tone for 90 more seconds.
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
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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-
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ing light may not operate properly.
If the malfunction indicator lamp comes on while driving
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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 indicator lamp
will go off after several trips.
If the malfunction indicator lamp does not go off, contact any authorized Lexus retailer or
Lexus authorized repairer, or any reliable repairer as soon as possible.
Warning light/Details/Actions
Rear passengers' seat belt reminder lights (warning buzzer)
Warns the rear passengers to fasten their seat belts
 Fasten the seat belt.
Master warning light
A buzzer sounds and the warning light comes on and flashes to
indicate that the master warning system has detected a malfunc-
tion.
 P. 581
Tire pressure warning light
When the light comes on:
Low tire inflation pressure such as
• Natural causes (P. 579)
• Flat tire (P. 610, 625)
 Adjust the tire inflation pressure to the specified level.
The light will turn off after a few minutes. In case the light does
not turn off even if the tire inflation pressure is adjusted, have the
system checked by any authorized Lexus retailer or Lexus
authorized repairer, or any reliable repairer.
When the light comes on after blinking for 1 minute:
Malfunction in the tire pressure warning system
 Have the system checked by any authorized Lexus retailer or
Lexus authorized repairer, or any reliable repairer.
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