Lexus 2012 RX450h Owner's Manual page 863

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: Open door warning buzzer:

The open door warning buzzer sounds to alert one or more of the doors is not

fully closed (with the vehicle having reached a speed of 3 mph [5 km/h]).

: Driver's and front passenger's seat belt buzzer:

The driver' s and front passenger' s seat belt buzzer sounds to alert the driver and

front passenger that his or her seat belt is not fastened. The buzzer sounds inter-

mittently for 10 seconds after the vehicle reaches a speed of 12 mph (20 km/h).

Then, if the seat belt is still unfastened, the buzzer will sound in a different tone

for 20 more seconds.

5-2. Steps to take in an emergency