Lexus GS430 User Manual page 450

STARTING AND DRIVING
GS430 only—When the vehicle speed exceeds about 50 km/h
(30 mph) even if the traction control system is turned off, the
system turns on automatically.
To turn on: Push "TRAC OFF" switch once again.
The slip indicator light will go off.
In the following cases, contact your Lexus dealer:
D The slip indicator light does not come on when the engine
switch is selected in "IG−ON" mode.
D The slip indicator light remains on after the engine is started
(GS430), or remains on a few seconds after the engine
switch is selected in "IG−ON" mode (GS300).
D The slip indicator light comes on in the normal driving mode
while driving.
426
Traction control system failure warning
G31039
" 1 GS430
2 GS300
If the traction 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 traction control system, vehicle
stability control system and hill−start assist 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.