Lexus GS430 User Manual page 376

STARTING AND DRIVING
If you push the engine switch while the brake pedal is
depressed with the transmission not in "P" or "N", "IG−ON"
mode is selected with the engine not running.
It is not a malfunction if the needles on all meters and gauges
move slightly when selected in "IG−ON" mode.
NOTICE
Do not leave the engine switch in "IG−ON" mode while
the engine is not running.
discharged.
352
"OFF" mode
The battery will be
This mode turns the engine and all accessories off.
To select the "OFF" mode, be sure that the selector lever
is in "P" and then turn the engine switch to "OFF".
To select the "OFF" mode from "IG−ON" mode:
D If the engine is not running, push the engine switch once
D If the engine is running, push the engine switch once
To select the "OFF" mode from "ACC" mode, push the engine
switch twice while the brake pedal is not depressed.
The engine immobilizer is automatically set, the security
indicator light blinks and the engine switch indicator light is
turned off. (For details, see "Engine immobilizer" on page 12.)
G31032
while the brake pedal is not depressed.
regardless of brake pedal position while the vehicle is
completely stopped.