Lexus LX 570 2016 Service Manual page 527

Warning light
Brake system warning light
 Have the vehicle inspected by your Lexus dealer immediately.
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: Brake system warning buzzer:
The buzzer sounds to indicate that the brake fluid level is low (with the vehicle
reached a speed of 3 mph [5 km/h]).
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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 3mph [5 km/h]).
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: Driver' s seat belt buzzer:
The driver' s seat belt buzzer sounds to alert the driver that his or her seat belt is not
fastened. Once the engine switch is turned to IGNITION ON mode, the buzzer
sounds for 6 seconds. If the vehicle reaches a speed of 12 mph (20 km/h), the buzzer
sounds once. If the seat belt is still unfastened after 24 seconds, the buzzer will sound
intermittently for 10 seconds. Then, if the seat belt is still unfastened, the buzzer will
sound in a different tone for 20 more seconds.
Front passenger' s seat belt buzzer:
The front passenger' s seat belt buzzer sounds to alert the front passenger that his or
her seat belt is not fastened. The buzzer sounds once if the vehicle reaches a speed of
12 mph (20 km/h). If the seat belt is still unfastened after 24 seconds, the buzzer will
sound intermittently for 10 seconds. Then, if the seat belt is still unfastened, the buzzer
will sound in a different tone for 20 more seconds.
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: Parking brake engaged warning buzzer:
A buzzer sounds to indicate that the parking brake is still engaged (with the vehicle
having reached a speed of 3 mph [5 km/h]).
LX570_OM_OM60N01U_(U)
7-2. Steps to take in an emergency
Warning light/Details/Actions
Indicates a malfunction in:
• The electronically controlled brake system
• The parking brake system
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