Lexus GS430 User Manual page 454

STARTING AND DRIVING
GS430—The slip indicator light comes on when the engine
switch is selected in "IG−ON" mode. The light goes off when
the engine is started.
GS300—The slip indicator light comes on for a few seconds
when the engine switch is selected in "IG−ON" mode.
If the indicator light does not come on when the engine switch
is selected in "IG−ON" mode, contact your Lexus dealer.
Keep the following in mind when driving:
D The hill−start assist control system operates for 5 seconds
maximally. If both the brake and accelerator pedals remain
undepressed for longer than 5 seconds, the system will
gradually stop operating.
D The hill−start assist control system is not designed for
stopping the vehicle on an uphill slope. When stopping the
vehicle, be sure to depress the brake pedal.
430
Hill−start assist control system failure
warning
G31039
" 1 GS430
2 GS300
If the hill−start assist control system malfunctions, the
slip indicator light (two−wheel drive models only) and
brake system warning light (yellow) come on. At this time,
the above message appears. (GS430 only—In some
cases, the multi−information display shows either
"CHECK VSC" or "CHECK ECB*" only.)
*: Electronically Controlled Brake System
If the message appears, the hill−start assist control system,
vehicle stability control system and traction control system do
not work. Although it is no problem to continue driving, have
your vehicle checked by your Lexus dealer as soon as
possible.