Lexus GS430 User Manual page 375

"ACC" mode
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This mode allows some accessories to be operable such
as the radio, even if the engine is not running. An amber
indicator light turns on at the engine switch.
To select the "ACC" mode from "OFF" mode, push the engine
switch once without depressing the brake pedal. The engine
immobilizer is disabled and the security indicator light goes
out. (For details, see "Engine immobilizer" on page 12.)
If you cycle once through all the modes ("OFF", "ACC",
"IG−ON") with the driver's door closed, the second time you
select the "ACC" mode, the above message will appear for a
few seconds.
If the vehicle is left in "ACC" mode for about an hour, the engine
switch is automatically off.
If the driver's door is opened with the transmission in "P", a
buzzer will remind you in "ACC" mode.
STARTING AND DRIVING
"IG−ON" mode
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"IG−ON" mode has two conditions: all gauges, meters
and accessories on and the engine is not running, or
engine running.
To select the "IG−ON" mode while the engine is not running:
D From "OFF" mode—push the engine switch twice without
depressing the brake pedal.
D From "ACC" mode—push the engine switch once without
depressing the brake pedal.
The engine switch indicator light will be illuminated amber if the
engine is not running, and will turn off when the engine is
running.
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