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Have the malfunction repaired immediately.
After taking the specified steps to correct the suspected problem, check that the warning message and light go off. ...

Stop the vehicle immediately.
The following warning indicates the possibility of damage to the vehicle that may lead to an accident. Immediately stop the vehicle in a safe place and contact your Lexus dealer. ...

Headlight switch
The headlights can be operated manually or automatically. Turning the end of the lever turns on the lights as follows: Type A 1. The daytime running lights turn off. 2. The headlights, park- ...