Lexus GS 350 Owner's Manual page 530

Warning message
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GS350_300_GS F_OM_OM30J17E_(GE)
Indicates that the brake hold system is turned on while on
a steep slope
A buzzer also sounds.
 Do not use only the brake hold system on steep
slopes. Be sure to also depress the brake pedal.
Indicates a malfunction in the parking brake system
A buzzer also sounds.
 Press the parking brake switch. If the warning mes-
sage is still displayed, have the vehicle inspected by
your Lexus dealer.
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Indicates an attempt was made to release the parking
brake without depressing the brake pedal
A buzzer also sounds.
 Release the parking brake while depressing the
brake pedal.
Indicates that the shift position was changed and Drive-
Start Control was operated while depressing the accel-
erator pedal
A buzzer also sounds.
 Momentarily release the accelerator pedal.
7-2. Steps to take in an emergency
Details/Actions
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