Lexus GS350 Owner's Manual page 458

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7-2. Steps to take in an emergency
Warning message
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GS350_300_GS F_OM_OM30G34U_(U)
Details/Actions
Indicates that the engine switch is turned off or turned to
ACCESSORY mode and the driver's door is opened
while the lights are turned on
A buzzer also sounds.
→ Turn the lights off.
Indicates that the moon roof is not fully closed (with the
engine switch off, and the driver's door open)
A buzzer also sounds.
→ Close the moon roof.
Indicates that the windows are not fully closed (with the
engine switch off, and the driver's door open)
A buzzer also sounds.
→ Close all the windows.
Indicates that the windows and the moon roof are not
fully closed (with the engine switch off, and the driver's
door open)
A buzzer also sounds.
→ Close all the windows and the moon roof.
Indicates a malfunction in the brake hold system
A buzzer also sounds.
→ Have the vehicle inspected by your Lexus dealer
immediately.