Lexus ES300 Owner's Manual page 72

GAUGES, METERS AND SERVICE REMINDER INDICATORS
How to check all the service reminder
indicators
(except the low fuel level warning light and low washer
fluid warning light):
1. Apply the parking brake.
2. Open the door.
The following service reminder indicator should come on. It
goes off when you close the door completely.
3. Turn the ignition key to "ON".
The following service reminder indicators should come on.
or
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The following service reminder indicators go off after a few
seconds.
or
The following service reminder indicator goes off after 6
seconds.
If any service reminder indicator or warning buzzer does not
function as described above, have it checked by your Lexus
dealer as soon as possible.
or
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Finish