Lexus RX300 Manual page 57

GAUGES, METERS AND SERVICE REMINDER INDICATORS
How to check all the service reminder indicators
(except the low fuel level 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 "ACC".
The following service reminder indicator should come on. It goes
off after 6 seconds.
4. Turn the ignition key to "ON".
The following service reminder indicators should come on.
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The following service reminder indicators go off after a few seconds.
If any service reminder indicator or warning buzzer does not
function, either the bulb is burned out or circuit is in need of repair.
Have it checked by your Lexus dealer as soon as possible.
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